CN103185142B - Follow-up sealing device for reciprocating motion of shaft lever - Google Patents

Abstract

A follow-up sealing device for the reciprocating movement of the shaft, including a fixed groove and overlapping multi-layer sealing sheets arranged inside the fixed groove; Sealing sheet, the arc length of the opening area of the multi-layer sealing sheet increases sequentially from top to bottom; the fixing groove is a box composed of two sealing sheets with the largest openings, and the width of the fixing groove is not less than that of the sealing sheet The width of the fixed groove is not less than the sum of the thicknesses of other sealing sheets; the invention provides a motor shaft that meets the basic requirements of the working box when the motor shaft moves back and forth in a circular arc and fan-shaped area relative to the working box. A device that requires sealing; the device solves the problem of a large amount of leakage of medium and noise in the box during the working process, improves the environmental protection performance of the equipment, improves the working environment, and has a simple structure, convenient installation, and low cost; the present invention is also applicable It is used on some devices that need to achieve sealing during movement.

Description

Follow-up sealing device for shaft reciprocating motion

technical field

The present invention relates to a sealing device in the field of engineering and machinery, in particular, it relates to a method for realizing that the working box always maintains a sealed state when the motor shaft or other moving bodies reciprocate on the plane perpendicular to the motor shaft of the working box. Dynamic sealing device.

Background technique

When the motor is working, the motor shaft rotates or moves back and forth. In order to achieve higher sealing requirements, most shaft seals such as floating seals, sliding positioning angle joint follower seals and magnetic follower seals are used to seal the shaft and adjacent parts as a whole. For equipment such as mills, grinders, mixers, crushers, and cutting machines, when the motor shaft performs linear reciprocating motion relative to a plane of the working box, in order to avoid flying dust and materials, control noise, and avoid motors and dust or For the contact of coolant, the front end of the motor shaft is often enclosed in the working box. Therefore, the motor shaft not only rotates itself or moves back and forth along the axial direction of the shaft, but also performs arc or fan-shaped reciprocating motion relative to the working box. And this area must be sealed to avoid flying dust and materials, control noise, avoid motor contact with dust or coolant, keep the working environment clean and protect the equipment. When the area of reciprocating motion is small enough relative to the box body, the sealing of the area of reciprocating motion of the shaft rod can be solved by connecting a sealing piece through the shaft sealing mechanism. When the area of reciprocating motion is large enough relative to the box body, since a sealing piece is limited by the boundary when moving, the problem of sealing is often not solved.

Contents of the invention

Aiming at the sealing problem of the working box when the motor shaft makes arc reciprocating motion relative to the working box which cannot be solved in the prior art, the present invention provides a follow-up sealing device for the reciprocating movement of the shaft, which solves the problem of When the movement area is larger than the box body, the sealing problem of the shaft movement area.

The technical solution of the present invention: the follow-up sealing device II for the reciprocating movement of the shaft, including a fixed groove and overlapping multi-layer sealing sheets arranged inside the fixed groove; the sealing sheet is provided with an arc-shaped opening at the center An arc-shaped metal sealing sheet with a radius of R, the arc length of the opening area of the multi-layer sealing sheet increases sequentially from top to bottom; the fixing groove is a box composed of two sealing sheets with the largest openings, and the fixing The width of the groove is not less than the width of the sealing sheet, and the thickness of the fixing groove is greater than the sum of the thicknesses of other sealing sheets;

The arc opening radius of the sealing sheet described in the first layer is equal to the shaft radius r, and the opening half angle θ ₁ is equal to 2arcsin (r/2R), and the arc opening width of the sealing sheet described in the nth layer is 2r, and the opening The half angle is θ _n ; the central angle of the sealing sheet moving from the center position at the beginning to the edge of the next layer of sealing sheet is m, and the distance between the opening of the sealing sheet in each layer and the upper and lower ends of the sealing sheet is equal. is d, the central angle corresponding to the distance between the arc-shaped opening of each layer of the sealing sheet and the distance between the left and right ends of the sealing sheet is L, and the corresponding central angle of the overlapping part between adjacent sealing sheets is not less than θ ”; the fixed groove is a box composed of two n-th layer sealing plates, and the θ _n -θ ₁ is the half-angle of movement of the shaft; there is the following relationship between the above parameters:

θ _n -θ ₁ =(n-1)×m(Eq.1), L=2m+θ"(Eq.2)

Obtained according to Eq.1 and Eq.2, the quantity n _I of described sealing sheet=[2(θ _n- θ ₁ )/(L _I -θ″)+1]+1; Said y=[x] is rounding function.

Preferably, the follow-up sealing device further includes a linear reciprocating sealing device, and the linear reciprocating sealing device includes a fixing groove II arranged on the first layer of sealing sheet and an overlapping multi-layer sealing sheet inside the fixing groove II II; the sealing sheet II is a rectangular metal sheet with an opening II in the center, and the length of the opening II of the multi-layer sealing sheet II increases sequentially from top to bottom; the fixing groove II is formed by two openings A box composed of the sealing sheet II with the largest hole II, the width of the fixing groove II is not less than the width of the sealing sheet II, and the thickness of the fixing groove II is greater than the sum of the thicknesses of other sealing sheets II;

The opening radius R _II1 of the sealing sheet II of the first layer is equal to the shaft radius r, and the distance from the center position of each layer of sealing sheet II to the edge of the sealing sheet II of the next layer is m _II , the nth The opening width of the sealing sheet II in the _II layer is 2r, and the opening length R _IIn = (n _II -1) × m _II + r, the opening of the sealing sheet II in each layer is on the upper and lower sides of the sealing sheet II. The distance between the ends is d _II1 , the distance between the opening of the sealing sheet II of each layer and the left and right ends of the sealing sheet II is L _II , and the overlapping length between adjacent sealing sheets II is not less than d _II2 , The opening length D _II of the fixed groove II is the radius of motion of the multilayer sealing sheet II; there is the following relationship between the above-mentioned parameters:

L _II =2m _II +d _II2 (Eq.3), D _II =R _IIn =(n _II -1)×m _II +r (Eq.4)

According to Eq.3 and Eq.4, the number n _II of the sealing sheet II =[2(D _II -r)/(L _II -d _II2 )+1]+1; the y=[x] is rounding function.

Preferably, the fixing groove is fixed on the opening part of the working box so as to realize the sealing in the working box when the shaft rod moves back and forth in an arc, and the fixing method is welding or screwing; the shaft rod and the first layer of sealing sheet The sealing method between them is the shaft seal.

Preferably, the fixing groove is fixed on the opening part of the working box to realize the sealing in the working box when the shaft moves, and the fixing way of the fixing groove is welding or bolting; the fixing groove II is fixed at the second The opening I of one layer of sealing sheet is used to realize the sealing in the working box when the shaft rod reciprocates in a straight line, and the fixing method is welding or screwing; the sealing method between the shaft rod and the first layer of sealing sheet II is shaft sealing .

Design principle of the present invention:

1. Follow-up sealing device in the arc reciprocating motion area

The whole sealing device is composed of a group of arc-shaped sealing sheets with openings. The arc-shaped sealing sheets are dislocated and overlapped with the arc reciprocating motion of the motor shaft, and the sealing sheets of each layer can move with the shaft in a certain area. According to the size of the circular reciprocating motion area of the motor shaft and the available area of the box, the number and size of the sealing pieces are designed according to certain rules, and the overall economy of the entire sealing device can be obtained while ensuring the sealing effect.

The sealing sheet can be iron sheet or other materials with certain strength. There is a certain overlapping length between the arc-shaped sealing sheets to ensure that the dust will not leak from the contact of the two sealing sheets. The central angle corresponding to the overlapping length of the arc-shaped sealing sheets in the arc direction is θ", no matter how the arc-shaped sealing sheets of each layer move, there is at least a certain overlapping length θ" between adjacent arc-shaped sealing sheets, so that Ensure effective sealing between two adjacent arc-shaped sealing sheets. The lap length between the arc edge of the arc-shaped sealing sheet and the fixing groove is d.

The multi-layer sealing sheet is divided into the first layer sealing sheet, the second layer sealing sheet, ... the nth layer sealing sheet according to the size. The arc lengths of the arc-shaped sealing sheets of each layer and the arc-shaped lengths of the openings increase sequentially (Fig. 1).

The largest (nth layer) arc-shaped sealing sheet is motionless and serves as a fixing groove for the sealing device. The fixing groove is a box with an opening formed by two n-th layer sealing plates, and the size of the opening is the size of the circular reciprocating motion area of the shaft. Other arc-shaped sealing sheets are placed in the fixing groove to realize their arc-shaped reciprocating movement with the shaft rod in the fixing groove. The width of the fixed groove is greater than that of the sealing sheet, and the thickness of the fixed groove is slightly greater than the sum of the thicknesses of the other sealing sheets, so as to accommodate the arc-shaped sealing sheet and ensure that the movement of the sealing sheet is relatively stable. The fixing groove can be fixed on the box body by welding or screwing, which is a part of the box body.

The opening radius of the first layer of sealing sheet is the radius r of the shaft or moving body, and the shaft seal or other sealing methods are used between the shaft rod and the first layer of sealing sheet.

1.1 Sealing principle of arc reciprocating motion area

Different arc-shaped sealing sheets have different arc-shaped openings, and the corresponding motion lengths are also different. Now take the follow-up sealing device of 3 arc-shaped plates as an example to explain the principle of motion.

Through the mutual movement of each arc-shaped sealing sheet, the gap left by the movement of each arc-shaped sealing sheet is filled by other sealing sheets to ensure that dust cannot pass through. The sealing sheets can be overlapped sequentially, alternately, or disorderly, subject to obtaining a good sealing effect. Sealing sheet I is on the first layer, sealing sheet II is on the second layer, and sealing sheet III is on the third layer. When moving, the seal I rotates to the edge of the opening of the seal II under the action of the shaft; then continues to move, and under the drag of the shaft, the seal I and the seal II rotate together to the edge of the seal III. The edge of the hole, the shaft moves to the edge of the movement. When moving back and forth, the sealing sheet I first rotates in the opposite direction and reaches the edge of the opening of the sealing sheet II; then drag the sealing sheet I and sealing sheet II to rotate together, and move to the other edge of the sealing sheet III, and finally realize the follow-up of the device. Mobility and sealing (Figure 1).

1.2 Design of sealing mechanism in arc reciprocating motion area

In arc motion, the most intuitive thing is the change of the arc corresponding to the central angle. Therefore, various parameters of the arc-shaped sealing sheet are determined by calculating the change of the angle corresponding to the central angle after each movement of the shaft.

It is known that the radius of the shaft or moving body is r, the radius of the moving arc is R (Figure 2), and the sealing contact length of the arc edge of the arc seal is d, then the width of the arc seal h≥2(r+ d) (Fig. 3). At the same time, the sealing contact length of the end edge of the arc-shaped sealing sheet in the arc direction is measured by the central angle θ".

Set the maximum opening half-angle to θ _n , and the central angle of a circle with a radius r corresponding to a circle with a radius R is θ ₁ =2arcsin(r/2R) (Figure 2), then the range of movement of the center point of the shaft is 2( θ _n -θ ₁ ).

The opening radius of the smallest sealing sheet is the shaft radius r, and the opening half-angle of the largest sealing sheet is θ _n . The opening angle 2θ _n on the largest sealing sheet (the nth sheet) is the maximum movement angle of the shaft; the largest sealing sheet does not participate in the movement, but a fixed groove for accommodating each layer of sealing sheets, and the flange part of the fixed groove corresponds to The central angle L determines the number n of sealing sheets.

Assume that when the movement starts, the arc-shaped sealing sheets are all in the center of the arc, and the central angle of the rotation of the sealing sheet moving to the edge of the next layer of sealing sheet is m. When n sealing sheets are used to cover and seal, n sealing sheets After realizing (n-1) times of sequential motion, the central angle of rotation is the maximum motion half angle θ _n -θ ₁ , namely:

(n-1)×m=θ _n -θ ₁ (Eq.1.1)

Then it can be determined that the angle value of each movement of each sealing piece is:

m=(θ _n -θ ₁ )/(n-1)(Eq.1.2)

It can be obtained from this that when the flange parts on both sides of the largest sealing piece (i.e. the fixing groove) correspond to the central angle L to satisfy L≥2m+θ″, the fixing groove can meet the requirements for accommodating the sealing piece, and the flange part of the fixing groove corresponds to the center of the circle Angle L is:

L=2m+θ"(Eq.1.3)

Combining formula (Eq.1.2) and formula (Eq.1.3), the number n of sealing sheets is determined by the following formula:

n=2(θ _n -θ ₁ )/(L-θ")+1(Eq.1.4)

Since the number of slices can only be rounded, the actual number of slices n' is:

n'=[n]+1=[2(θ _n -θ ₁ )/(L-θ")+1]+1 (Eq.1.5)

After calculating n', replace n' with n', calculate the moving angle m of each sealing plate according to the formula (Eq.1.2), and then calculate the size of each sealing plate.

The size of each sealing piece is calculated according to the following method.

Now take 4 sealing sheets, the opening half-angle of the first sealing sheet is θ ₁ , and the maximum half-angle of the opening on the largest sealing sheet (nth sheet) is θ ₄ as an example to deduce the formula.

Figure 2 shows the position reached by the shaft after three movements;

It can be seen from Fig. 3 that the center angle of the first movement of the shaft is m=(θ ₄ -θ ₁ )/3, and the angle of movement is m;

It can be seen from Figure 4 that the angle of the center of the second movement of the shaft is m=(θ ₄ -θ ₁ )/3, and the movement is 2m;

It can be seen from Fig. 5 that the center angle of the third movement of the shaft is m=(θ ₄ -θ ₁ )/3, and the angle of movement is 3m.

The specific parameters of each sealing sheet (opening half angle and sealing sheet arc length half angle) are as follows:

The first layer of sealing sheet: the half angle of the opening is θ ₁ , the arc length and half angle of the sealing sheet is 2m+θ ₁ +θ″;

The second layer of sealing sheet: the half angle of the opening is θ ₁ +m, and the arc length and half angle of the sealing sheet is 3m+θ ₁ +θ″;

The third layer of sealing sheet: the half angle of the opening is θ ₁ +2m, and the arc length and half angle of the sealing sheet is 4m+θ ₁ +θ″;

...

The nth layer sealing sheet: the opening half angle is θ ₁ +(n-1)m=θ ₁ +(n-1)(θ _n -θ ₁ )/(n-1)=θ _n ,

The arc length and half angle of the sealing sheet is (n+1)m+θ ₁ +θ″=θ _n +2m+θ″

From the formula of the last nth slice, it is known that the above parameter formulas are all established and the conditions are satisfied.

It is known from the formula that the central angle L corresponding to the flange length (length of the unopened hole) of all sealing sheets is 2m+θ". Therefore, by increasing the number of sealing sheets and reducing the movement angle m each time, the sealing The flange length of the sheet and the size of the fixing groove. The result calculated by this method satisfies 2m+θ″≤L, and L is the actual flange length of the fixing groove (Figure 6).

The simplest mechanism is a layer of movable plates and a fixed slot. In this case, the movement area is relatively small compared to the case.

2. Combined follow-up sealing device in the fan-shaped reciprocating motion area

2.1 Design principle

The sealing in the fan-shaped area is realized through the combination of the circular arc reciprocating sealing device and the linear reciprocating sealing device. Fix the linear reciprocating motion sealing device on the first sealing piece I of the circular arc reciprocating motion device. The linear reciprocating motion sealing device is used to adjust the radial position of the moving body in the fan-shaped motion area. When the radial position is determined, the circular arc reciprocating motion The motion device can be adjusted in the arc direction to change the arc position of the device, so as to realize the movement of the motion body in the fan-shaped area.

The radius of the opening II of the first sealing sheet II of the linear reciprocating sealing device is the radius r of the shaft or the moving body, and the shaft or moving body is fixed and sealed with the first sealing sheet II. The opening I of the first fan-shaped sealing sheet I of the arc reciprocating motion sealing device is the fixing groove II of the linear reciprocating motion device, and the first fan-shaped sealing sheet I of the arc reciprocating motion device is fixed and sealed with the fixing groove II of the linear reciprocating motion device . The combined device realizes the movement of the shaft rod or the moving body in the fan-shaped area. Refer to Figure 7 for the motion track and fan-shaped motion area of the combined follow-up sealing device, refer to Figure 8 for the seal II of the linear reciprocating sealing device, and refer to Figure 9 for the seal I of the circular arc reciprocating sealing device.

Different sealing sheets have different openings, and the corresponding movement lengths are also different. When adjusting the radius of motion, it is realized by the linear reciprocating motion sealing device. Carry out arc motion, and the linear reciprocating motion sealing device drags the fan-shaped sealing sheet I of the opening to move mutually. The fan-shaped sealing piece 1 is embedded in the hole groove, and the frictional force is small, and it also moves thereupon, and finally realizes follow-up and sealing of the device.

Through the mutual movement of each sealing sheet, the gap left by each sealing sheet is filled by other sealing sheets to ensure that dust cannot pass through. The sealing sheets can be overlapped sequentially, alternately, or disorderly, subject to obtaining a good sealing effect.

2.2 Linear reciprocating motion sealing device

When the shaft or moving body reciprocates linearly relative to the working box, the radius of the shaft or moving body is known as r, the size of the linear reciprocating motion is 2D _II , and the overlapping length between each sealing plate is d _II2 . The distance between the opening of each sealing piece and the upper and lower ends is d _II1 , in order to keep the seal, the width of the sealing piece h≥2×(r+d _II1 ) (Figure 10).

The opening radius of the sealing sheet II of the first layer is R _II1 =r. The largest sealing piece I does not participate in the movement, it is a fixed groove, and the opening radius of the fixed groove R _IIn =D _II . The opening radius D _II of the fixing groove determines the final movement radius of the shaft rod, and other sealing plates II are placed in the fixing groove II. The size of the fixing groove, that is, the last sealing sheet II (block n), is limited by the size of the casing.

The quantity and the size of the opening for each sealing sheet II are determined by the following formula:

Assume that when the movement starts, the seals II are all in the center position (Figure 10). The sealing sheet II moves to the edge of the next sealing sheet II at a distance of m _II each time. After the first sealing sheet II moves to the left for a distance of m _II , the left side reaches the opening edge of the second sealing sheet II. On the side, the end of the first sealing plate II is aligned with the end of the second sealing plate II; on the right side, the end of the first sealing plate II and the end of the second sealing plate II have an overlap of length d _II2 . Thus, when the flange length L _II on both sides of the last stage sealing sheet II (fixing groove) is 2m _II +d _II2 , the relative movement and sealing requirements of the sealing sheet II can be met. In order to meet the requirement of accommodating the sealing sheet II for the fixing groove II, the flange length L _II of the fixing groove II should not be less than 2m _II +d _II2 .

To obtain all the parameters of each sealing plate II, when the radius r of the rod shaft and the moving radius D _II of the sealing plate mechanism are known, the number n _II of the sealing plate II and the moving distance m _II of the sealing plate II should also be known .

The n _II -level sealing sheet realizes (n _II -1) times of movement, and the moving distance is (n _II -1)m _II (Figure 4), then:

(n _II -1)×m _II +r＝D _II (Eq.2.1)

Then: m _II = (D _II -r)/(n _II -1) (Eq.2.2)

If the flange length of the fixing slot is L _II , then (Fig. 4):

L _II ＝2m _II +d _II2 (Eq.2.3)

Combining formula (Eq.2.2) and formula (Eq.2.3), the number n of sealing sheets is determined by the following formula:

n _II ＝2(D _II -r)/(L _II -d _II2 )+1(Eq.2.4)

Since the number of slices can only be rounded, the actual number of slices n _II ′ is:

n _II ′=[n _II ]+1=[2(D _II -r)/(L _II -d _II2 )+1]+1 (Eq.2.5)

From the formula (Eq.2.4), it can be seen that if the opening radius D _II is larger, the groove width L _II is smaller, and the number of sealing sheets II required is larger. When L _II ≥ D _II + d _II2 , one layer of movable sheet and one fixed groove can realize sealing.

After calculating n _II ′, replace n _II with n _II ′, calculate the moving distance m _II of each sealing sheet II according to the formula (Eq.2.2), and then calculate the size of each sealing sheet II.

The opening radius and sealing plate radius of the sealing plate II can be obtained by the following formula:

The first layer of sealing sheet II: opening radius R _II1 = r, sealing sheet radius S _II1 = r+2m _II +d _II2 ;

The second sealing sheet II: opening radius R _II2 = r+m _II , sealing sheet radius S _II2 = r+3m _II +d _II2 ;

The third layer of sealing sheet II: opening radius R _II3 =r+2m _II , sealing sheet radius S _II3 =r+4m _II +d _II2 ;

...

Sealing sheet II of the nth _II layer: opening radius R _IIn =r+(n _II -1)m _II =D _II ,

Radius of sealing sheet S _IIn =r+(n _II +1)m _II +d _II2 =D _II +2m _II +d _II2 .

From the formula, it is known that the flange length L _II (the length without holes) of all sealing sheets II is 2m _II +d _II2 , which is related to the moving distance m _II each time. Therefore, if you want to reduce the size of the fixing groove II, you can reduce the moving distance m _II each time by increasing the number of sealing pieces II, and at the same time reduce the flange length L _II of the sealing piece II, reducing the fixing Dimensions of Tank II. The result calculated by this method satisfies 2m _II +d _II2 ≤ L _IIa , where L _IIa is the actual flange length of the fixing groove II.

2.3 Combination of linear reciprocating sealing device and arc reciprocating sealing device

The linear reciprocating motion sealing device is placed in the fixed groove I, and is connected with the first sealing piece I of the circular arc reciprocating motion device by welding or screwing, so as to achieve the purpose of combined motion. Refer to Figure 11 for the specific style. And the circular arc reciprocating device is also placed in the corresponding fixed groove 1, and is connected with the machine by welding or mortise.

Beneficial effects of the present invention:

(1) The present invention provides a device that meets the basic sealing requirements of the working box when the motor shaft moves back and forth in a circular arc and fan-shaped area relative to the working box; The problem of a large amount of leakage of medium and noise in the body improves the environmental protection performance of the equipment and improves the working environment, and the structure is simple, the installation is convenient, and the cost is low;

(2) The present invention realizes the sealing of the working box during the reciprocating motion in the circular arc and fan-shaped area of the motor shaft through the overlapping and embedding of the multi-layer sealing sheets arranged in the fixing groove at the opening of the working box;

(3) The present invention can be designed according to the size of the box body and the size of the reciprocating motion area of the shaft, thereby determining the number and specific size of the sealing sheets, realizing a win-win situation of material saving and sealing effect, and achieving better economic effects;

(4) The follow-up sealing device of the present invention utilizes the space of the casing to the greatest extent, and obtains the working area of the motor under the premise of limited space;

(5) The present invention is not only applicable to shaft rods, but also applicable to some devices that need to realize sealing during movement.

Description of drawings

Fig. 1 is an exploded pattern diagram of the three-layer sealing sheet in the follow-up sealing device of circular arc reciprocating motion of the present invention;

Fig. 2 is the three motion states of the shaft rod in the circular arc reciprocating motion follow-up sealing device of the present invention;

Fig. 3 is the circular arc reciprocating motion follow-up sealing device of the present invention, in which the shaft drags the sealing sheet I to move to the left edge of the opening of the sealing sheet II;

Fig. 4 is the circular arc reciprocating motion follow-up sealing device of the present invention, in which the shaft rod drags the sealing plate II to move to the left edge of the opening of the sealing plate III;

Fig. 5 is the maximum seal piece (fixed groove) of the follow-up sealing device of circular arc reciprocating motion of the present invention;

Fig. 6 shows the installation area and the actual situation of the machine of the circular-arc reciprocating motion follow-up sealing device of the present invention.

Fig. 7 is the motion track and the fan-shaped motion area of the moving body in the combined follow-up sealing device of the fan-shaped reciprocating motion area of the present invention;

Fig. 8 is a schematic structural view of the linear reciprocating motion sealing device (three pieces) sealing sheet II in the combined follow-up sealing device in the fan-shaped reciprocating motion area of the present invention;

Fig. 9 is the structural representation of circular arc reciprocating motion sealing device (three pieces) sealing sheet 1 in the combined follow-up sealing device of fan-shaped reciprocating motion area of the present invention;

Fig. 10 is an exploded view of the sealing principle of the linear reciprocating sealing device in the combined follow-up sealing device in the fan-shaped reciprocating motion area of the present invention;

Fig. 11 is the specific pattern when the combined follow-up sealing device in the fan-shaped reciprocating motion area is superimposed;

Among them: 1. Fan-shaped motion area, 2. Linear motion trajectory, 3. Arc motion trajectory, 4. Shaft, 5. The first layer of sealing sheet, 6. The second layer of sealing sheet, 7. The third layer of sealing sheet.

detailed description

The present invention will be further described below in conjunction with the accompanying drawings.

Example 1:

The follow-up sealing device II for the reciprocating movement of the shaft includes a fixed groove and overlapping multi-layer sealing sheets arranged inside the fixed groove; Metal sealing sheet, the arc length of the opening area of the multi-layer sealing sheet increases sequentially from top to bottom; the fixing groove is a box composed of two sealing sheets with the largest opening, and the width of the fixing groove is not less than the width of the sealing sheet Width, the thickness of the fixing groove is greater than the sum of the thicknesses of other sealing sheets. The fixing groove is fixed on the opening part of the working box to realize the sealing in the working box when the shaft rod moves back and forth in a circular arc, and the fixing method is welding or bolting. The sealing method between the shaft rod and the first layer of sealing sheet is shaft sealing.

The arc-shaped opening radius of the first sealing sheet is equal to the shaft radius r, and the half-angle of the opening θ ₁ is equal to 2arcsin (r/2R). The arc-shaped opening width of the n-th layer of sealing sheet is r, and the opening half-angle is θ _n The center angle of each layer of sealing sheet moving from the center position at the beginning to the edge of the next layer of sealing sheet is m, the distance between the opening of each layer of sealing sheet and the upper and lower ends of the sealing sheet is d, and the distance of each layer of sealing sheet The central angle corresponding to the distance between the arc-shaped opening and the left and right ends of the sealing sheet is L, and the corresponding central angle of the overlapping part between adjacent sealing sheets is not less than θ"; A box composed of layers of sealing sheets, the θ _n -θ ₁ is the half-angle of movement of the shaft; the relationship between the above parameters is as follows:

θ _n -θ ₁ =(n-1)×m(Eq.1), L=2m+θ"(Eq.2)

Obtained according to Eq.1 and Eq.2, the quantity n _I of described sealing sheet=[2(θ _n- θ ₁ )/(L _I -θ″)+1]+1; Said y=[x] is rounding function.

Example 2:

The follow-up sealing device II for the reciprocating motion of the shaft includes a circular arc reciprocating sealing device and a linear reciprocating sealing device; the circular arc reciprocating sealing device includes a fixed groove I on the working box and a fixed The overlapping multi-layer sealing sheet I inside the groove I; the fan-shaped metal sealing sheet whose center is provided with the radius R of the arc-shaped opening is the fan-shaped metal sealing sheet I, and the arc length of the multilayer sealing sheet I opening area is from top to The lower ones increase sequentially; the fixed groove I is a box composed of two sealing sheets I with the largest openings, the width of the fixed groove I is not less than the width of the sealing sheet I, and the thickness of the fixed groove I is greater than other sealing sheets The sum of the thicknesses of I; the linear reciprocating sealing device includes the fixed groove II on the first layer of sealing sheet I and the overlapping multi-layer sealing sheet II inside the fixing groove II; the sealing sheet II is set at the center There is a rectangular metal sealing sheet with opening II, the length of the opening II of the multilayer sealing sheet II increases sequentially from top to bottom; the fixed groove II is a box composed of two sealing sheets II with the largest opening II, The width of the fixing groove II is not smaller than the width of the sealing sheet II, and the thickness of the fixing groove II is greater than the sum of the thicknesses of other sealing sheets II. The fixing groove I is fixed on the opening part of the working box to realize the sealing in the working box when the shaft moves, and the fixing method is welding or screwing. The fixing groove II is fixed at the opening I of the first layer of sealing sheet I to realize the sealing in the working box when the shaft rod reciprocates linearly, and the fixing method is welding or screwing. The sealing method between the shaft rod and the first layer of sealing sheet II is shaft sealing.

The radius of the arc-shaped opening I of the first layer of sealing sheet I is equal to the shaft radius r, and the opening half-angle θ ₁ is equal to 2 arcsin (r/2R), and the width of the arc-shaped opening of the n-th layer of sealing sheet I is r, and the opening The half angle is θ _n ; every layer of sealing sheet I moves from the central position at the beginning to the center angle of the rotation of the edge of the next layer of sealing sheet I is m, and the opening I of each layer of sealing sheet I is connected to the upper and lower ends of sealing sheet I. The distances are all d _I , the central angle corresponding to the distance between the arc-shaped opening of each layer of sealing sheet I and the distance between the left and right ends of sealing sheet I is L _I , and the corresponding central angle of the overlapping part between adjacent sealing sheets I is not less than θ"; the fixed groove I is a box composed of two n-th layers of sealing sheets I, and the θ _n -θ ₁ is the half-angle of movement of the shaft; the relationship between the above parameters is as follows:

θ _n -θ ₁ =(n _I -1)×m _I (Eq.5), L _I =2m _I +θ” (Eq.6)

According to Eq.5 and Eq.6, the number n _I of the sealing sheet I=[2( _{θn- θ1} )/(L _I -θ")+1]+1; the y=[x] is the rounding function.

The opening radius R _II1 of the first layer of sealing sheet II is equal to the shaft radius r, and the distance from the center position of each layer of sealing sheet II to the edge of the next layer of sealing sheet II is m _II , and the nth layer of sealing sheet II The opening width is 2r, the opening length R _IIn =(n _II -1)×m _II +r, the distance between the opening of each layer of sealing sheet II and the upper and lower ends of sealing sheet II is d _II1 , each layer The distance between the opening of the sealing sheet II and the left and right ends of the sealing sheet II is L _II , the lap length between adjacent sealing sheets II is not less than d _II2 , and the opening length D _II of the fixing groove II is at least The radius of motion of the layer sealing sheet II; there is the following relationship between the above parameters:

L _II =2m _II +d _II2 (Eq.3), D _II =R _IIn =(n _II -1)×m _II +r (Eq.4)

According to Eq.3 and Eq.4, the number n _II of the sealing sheet II =[2(D _II -r)/(L _II -d _II2 )+1]+1; the y=[x] is rounding function.

Claims (4)

1. for the reciprocating servo sealer of axostylus axostyle, it is characterized in that: comprise multi-layer sealed, multi-layer sealed total n+1 layer diaphragm seal, wherein n-th layer diaphragm seal is identical with (n+1)th layer of diaphragm seal structure, fixed groove is the box be made up of n-th layer diaphragm seal and (n+1)th layer of diaphragm seal, and all the other diaphragm seals are arranged on fixed groove inside and lay equal stress on to stack and put; The radius being provided with arc perforate centered by diaphragm seal described in multilayer is the curved foil of R, and described in multilayer, the arc length of diaphragm seal arc opening area from top to bottom increases successively; The arc perforate of described n-th layer diaphragm seal and (n+1)th layer of diaphragm seal is maximum, and the width of described fixed groove is not less than the width of other diaphragm seals, and the thickness of described fixed groove is greater than the thickness sum of other diaphragm seals; The arc perforate radius of diaphragm seal described in first layer equals axostylus axostyle radius r, arc perforate half-angle θ ₁equal 2arcsin (r/2R), the arc aperture widths of described n-th layer diaphragm seal is 2r, and arc perforate half-angle is θ _n; It is m that every layer of described diaphragm seal moves to the central position of the axostylus axostyle during axostylus axostyle setting in motion central angle that lower one deck diaphragm seal arc apertured end rotates by this layer of diaphragm seal, the arc apertured end of every layer of described diaphragm seal and the distance of this layer of diaphragm seal upper/lower terminal are d, the central angle that the arc apertured end of every layer of described diaphragm seal is corresponding with the distance at this layer of left and right two ends of diaphragm seal is L, and the central angle that the overlap between adjacent described diaphragm seal is corresponding is not less than θ "; θ _n-θ ₁for the motion half-angle of axostylus axostyle; Following relation is there is between above-mentioned parameter:

Eq.1:θ _n-θ ₁＝(n-1)×m，Eq.2:L＝2m+θ”

Obtain according to Eq.1 and Eq.2, the quantity n+1=[2 (θ of diaphragm seal described in multilayer _n-θ ₁)/(L-θ ")+1]+1; Wherein, [2 (θ _n-θ ₁)/(L-θ ")+1] round.

2. according to claim 1 for the reciprocating servo sealer of axostylus axostyle, it is characterized in that: described servo sealer also comprises straight reciprocating motion seal arrangement, described straight reciprocating motion seal arrangement comprises multi-layer sealed II, and described multi-layer sealed II has n _iI+ 1 layer of diaphragm seal II, wherein n-th _iIlayer diaphragm seal II and n-th _iI+ 1 layer of diaphragm seal II structure is identical, and fixed groove II is located on diaphragm seal described in first layer, and fixed groove II is by n-th _iIlayer diaphragm seal II and n-th _iIthe box that+1 layer of diaphragm seal II forms, all the other diaphragm seals II is arranged on fixed groove II inside and lays equal stress on to stack and put; Be provided with the rectangular sheet metal of perforate II centered by described multi-layer sealed II, the length of the perforate II of described multi-layer sealed II from top to bottom increases successively; Described n-th _iIlayer diaphragm seal II and n-th _iIthe perforate II of+1 layer of diaphragm seal II is maximum, and the width of described fixed groove II is greater than the width of other diaphragm seals II, and the thickness of described fixed groove II is not less than the thickness sum of other diaphragm seals II; The radius R of the perforate II of diaphragm seal II described in first layer _iI1equal axostylus axostyle radius r, the distance that every layer of described diaphragm seal II moves to the end of the perforate II of lower one deck diaphragm seal II by this layer of diaphragm seal II with the central position of axostylus axostyle during axostylus axostyle setting in motion is m, described n-th _iIthe width of the perforate II of layer diaphragm seal II is the half R of 2r, the length of perforate II _iIn=(n _iI-1) × m _iIthe end of+r, the perforate II of every layer of described diaphragm seal II and the distance of this layer of diaphragm seal II upper/lower terminal are d _iI1, the end of the perforate II of every layer of described diaphragm seal II and the distance at this layer of left and right two ends of diaphragm seal II are L _iI, the lap length between adjacent described diaphragm seal II is not less than d _iI2, the half D of the length of the perforate II of described fixed groove II _iIbe n-th _iIthe half of the length of the perforate II of layer diaphragm seal II; Following relation is there is between above-mentioned parameter:

Eq.3:L _II＝2m _II+d _II2，Eq.4:D _II＝R _IIn＝(n _II-1)×m _II+r

Obtain according to Eq.3 and Eq.4, the quantity n of described diaphragm seal II _iI+ 1=[2 (D _iI-r)/(L _iI-d _iI2)+1]+1; Wherein, [2 (D _iI-r)/(L _iI-d _iI2)+1] round.

3. according to claim 1 for the reciprocating servo sealer of axostylus axostyle, it is characterized in that: the sealing when open part that described fixed groove is fixed on working box is to realize the to-and-fro motion of axostylus axostyle circular arc in working box, the fixing mode of described fixed groove is welding or rivet clasp; Sealing means between axostylus axostyle and first layer diaphragm seal is shaft sealing.

4. according to claim 2 for the reciprocating servo sealer of axostylus axostyle, it is characterized in that: described fixed groove is fixed on the open part of working box to realize sealing when axostylus axostyle moves in working box, and the mode that described fixed groove is fixed is welding or rivet clasp; The sealing when tapping that described fixed groove II is fixed on first layer diaphragm seal is to realize axostylus axostyle straight reciprocating motion in working box, described fixed groove II is fixed on the means of fixation of the tapping of first layer diaphragm seal for welding or rivet clasp; Sealing means between axostylus axostyle and first layer diaphragm seal II is shaft sealing.