CN107218215B

CN107218215B - Vane type volumetric pump

Info

Publication number: CN107218215B
Application number: CN201710653958.4A
Authority: CN
Inventors: 郭素英
Original assignee: Individual
Current assignee: Wenling Chentai Machinery Co ltd
Priority date: 2017-08-03
Filing date: 2017-08-03
Publication date: 2019-01-01
Anticipated expiration: 2037-08-03
Also published as: CN107218215A

Abstract

The invention relates to a vane type positive displacement pump, comprising a stator, a drive shaft, a vane, a ferrule, a flow distribution side plate and an end cover. It is enclosed with the distribution side plate to form a pump chamber. The vane, the ferrule and the drive shaft are arranged in the pump chamber. The ferrule device is on both sides of the drive shaft in the axial direction and forms an annular groove with the outer cylindrical surface of the drive shaft. One end of the vane is hinged on the On the inner wall of the stator, the other end is slidably clamped in the annular groove. By changing the blade structure and arranging rolling bearings on the rotor surface, the invention converts the sliding of the blade along the rotor groove into the swing of the blade around the cylindrical hinge, and changes the sliding friction into rolling friction. Due to the limitation of the annular groove, one end of the blade is abutted outside the rolling bearing. The surface of the vane is improved, the force of the vane is improved, the large wear and blocking caused by the sliding of the vane of the traditional vane pump along the radial groove are avoided, and the strength of the drive shaft, the mechanical efficiency and the service life of the pump are improved.

Description

Vane type volumetric pump

Technical field

The present invention relates to volume pump technical fields more particularly to a kind of vane type volumetric to pump.

Background technique

Traditional single acting vane pump is to be configured by blade in rotor slot using rotor and the eccentric of stator, is being turned Son rotation when, so that blade is slided and is thrown away along rotor slot by centrifugal force and be pressed on stator inner wall, thus formed it is several can be changed it is close Cavity is sealed to realize imbibition and drain.Traditional blades pump configuration makes between blade and rotor slot that there are sliding friction, blade upper ends It is acted on by centrifugal force there is also larger frictional force with stator inner surface, exacerbates blade wear, reduce vane pump service life, And frictional force and the inclination of the resultant direction and blade groove of blade centrifugal force between Corioli inertial force, blade suffered by the blade and stator When direction is inconsistent, will generate lateral force causes blade stuck, influences the reliability and operation flexibility of pump.

Summary of the invention

To solve the problems, such as that traditional single acting vane pump blade wear is big, easily stuck, the present invention provides a kind of vane type Blade is changed into blade one end and the hinged other end of stator along the sliding of rotor slot and swung around circle hinged place, become and slide by positive displacement pump Dynamic friction is rolling friction, effectively reduces the abrasion and easy stuck problem of blade, improves the service life of vane pump.

The technical scheme to solve the above technical problems is that a kind of vane type volumetric pump, comprising:

Stator has tubular cavity and two mounting surfaces positioned at tubular cavity two sides, offers on the stator Channel, the channel are connected to the inner wall of two mounting surfaces and the stator；

Drive shaft, in the rotatable tubular cavity that the stator is set；The drive shaft includes rotor and peace Shaft on the rotor, the shaft and the tubular cavity of the stator are coaxial, the axis of the rotor with it is described fixed The axis of auxiliary cylinder shape cavity is in parallel without being overlapped, and distance between the two is eccentricity one, and the rotor is driven by the shaft And it rotates；

Cutting ferrule offers circular groove to be cylindric on an end face of the cutting ferrule, the axis of the circular groove with For the axis of the cutting ferrule external cylindrical surface in parallel without being overlapped, distance between the two is eccentricity two, the eccentricity two and institute It is equal to state eccentricity one, the cutting ferrule is set as two, the circular groove notch of two cutting ferrules relatively device described The two sides of stator and the rotor in axial direction, the bottom surface of two circular grooves respectively with two end faces of the rotor Fitting, whens drive shaft turns, drive the cutting ferrule to rotate with it, the inner sidewall of the circular groove and the rotor it is outer Annular groove, the circular groove and the rotor coaxial are formed between cylindrical surface；The mounting surface difference of two of the stator It is slidably matched with the end face of two cutting ferrules；

Flow side plate, to be cylindric, one end face opens up fluted, the flow side plate external cylindrical surface and the groove Side between offer multiple assignment holes for running through the flow side plate both ends of the surface, flow side plate include preceding flow side plate and Flow side plate afterwards, the assignment hole of the preceding flow side plate is interior to be equipped with tapping valve, the assignment hole of the rear flow side plate Interior to be equipped with liquid sucting valve, the preceding flow side plate and/or the center of flow side plate afterwards are also provided with and match with the shaft Axis hole two；Two groove notches of the preceding flow side plate and the rear flow side plate are relatively mounted on the stator Axial two sides are enclosed pump chamber with the stator, and the pump chamber is connected to by the channel with the assignment hole；

Multiple blades, one end, and can be relatively described fixed along the inner wall that the axial direction of the stator is hinged on the stator Son rotation, the other end of the blade are provided with cylindrical trunnion, the diameter of the trunnion and the annular groove radially Width is equal, and the trunnion is inserted into the annular groove and can swing with the rotation of the annular groove；

Working chamber, the working chamber are formed between two adjacent blades, the inner wall of stator, the external cylindrical surface of rotor and two cutting ferrules It is connected to by the channel with institute assignment hole；

End cap, fixed device in axial two outside of the pump chamber, including drive end bearing bracket and rear end cap, the drive end bearing bracket and/or Axis hole three is also provided on rear end cap；The shaft is pierced by from the axis hole three, is divided on the drive end bearing bracket and the rear end cap Not She Zhi apocenosis passage and imbibition channel, the apocenosis passage and the imbibition channel pass sequentially through respectively the assignment hole and The channel is connected to the working chamber；

When the shaft drives rotor rotation, the radial distance of the external cylindrical surface of the rotor and the stator inner wall Generating period sexually revises, and the rotor drives the blade to swing around with the articulated section of stator inner wall.

Further, axially disposed on the inner wall of the stator to have cylinder groove, one end of the blade is provided with and circle The cylinder hinge that column slot matches, the cylinder hinge are inserted into cylinder groove, form the blade and the stator hingedly.

Further, axially disposed on the inner wall of the stator to have cylinder hinge, one end of the blade is provided with and circle Column cuts with scissors the cylinder groove matched, and the cylinder hinge is inserted into cylinder groove, forms the blade and the stator hingedly.

Further, axis hole is offered on the end face of at least one in two cutting ferrules, the shaft is inserted into institute It states in axis hole.

Further, using transition fit or interference fit connection between the shaft and axis hole one, or using key connection Or spline connection.

Further, the rotor exterior device has rolling bearing, and the blade is connected to the outer ring of the rolling bearing On.

Further, the imbibition channel is arranged on the rear end cap, it includes the liquid sucting port being connected and low pressure oil Chamber, the liquid sucting port are to be provided with the through-hole of the rear end cap radially, and the low pressure oil pocket is to be provided with the rear end cap end Annular groove on face, the liquid sucting port are connected to by the low pressure oil pocket with the assignment hole；The apocenosis passage is arranged in institute It states on drive end bearing bracket, it includes the leakage fluid dram and high-voltage oil cavity being connected, and the leakage fluid dram is to be provided with the drive end bearing bracket radially Through-hole, the high-voltage oil cavity is the annular groove being provided on the drive end bearing bracket end face, and the leakage fluid dram passes through the high pressure oil Chamber is connected to the assignment hole.

Further, the rolling bearing is needle bearing.

Further, two mounting surfaces of the stator are connected to by the channel with the inner wall of the stator simultaneously.

Further, the channel includes channel one and channel two, the channel one by the inner wall of the stator with it is described One mounting surface of stator is connected to, and the inner wall of the stator is connected to by the channel two with another mounting surface of the stator.

The invention has the advantages that rolling bearing is set in rotor surface by changing blade construction in the present invention, it will Blade is changed into the swing that blade is cut with scissors around cylinder along the sliding of rotor slot, and change sliding friction is rolling friction, while cutting ferrule and rolling One end of blade is connected to rolling bearing outer surface by the annular groove between dynamic bearing, is improved vane stress situation, is avoided Traditional blades pump blade wears big and stuck phenomenon caused by radially slot slides, and improves the intensity of drive shaft, the machinery of pump Efficiency and service life, sealing effect are good.

Detailed description of the invention

Fig. 1 is overall structure diagram of the invention；

Fig. 2 is cross-sectional view at A-A in Fig. 1；

Fig. 3 is stator structure schematic diagram of the invention；

Fig. 4 is blade construction schematic diagram of the invention；

Fig. 5 is drive shaft structural schematic diagram of the invention；

Fig. 6 is ferrule structure schematic diagram of the invention；

Fig. 7 is preceding flow side front plate structural schematic diagram of the invention；

Fig. 8 is preceding flow side back panel construction schematic diagram of the invention；

Fig. 9 is rear flow side plate positive structure schematic of the invention；

Figure 10 is rear flow side plate structure schematic diagram of the invention；

Figure 11 is drive end bearing bracket structural schematic diagram of the invention；

Figure 12 is rear end cover structure schematic diagram of the invention；

1. rear end cap, flow side plate after 2., 3. stators, 4. blades, flow side plate before 5., 6. drive end bearing brackets；7. cutting ferrule；8. Rotor；9. shaft；10. rolling bearing, 11. liquid sucting ports, 12 low pressure oil pockets, 21. grooves, 22. assignment holes, 23. tapping valves, 24. Liquid sucting valve, 31. cylinder grooves, 32. channels, 41. cylinders hinge, 42. trunnions, 51. axis holes two, 61. leakage fluid drams, 62. high-voltage oil cavities, 63. axis hole three, 71. axis holes one, 72. circular grooves.

Specific embodiment

The present invention will be described in detail below with reference to the accompanying drawings and embodiments.Below in conjunction with attached drawing to the principle of the present invention It is described with feature, it should be noted that in the absence of conflict, the features in the embodiments and the embodiments of the present application It can be combined with each other.The given examples are served only to explain the present invention, is not intended to limit the scope of the present invention.

Fig. 1-2 is please referred to, Fig. 1-2 schematically shows one embodiment of 4 formula positive displacement pump of single-acting blade in the present invention Structure, including stator 3, drive shaft, blade 4, cutting ferrule 7, flow side plate and end cap.

Centered on stator 3, successively device has flow side plate and end cap, stator 3 and flow side plate to axial sides respectively It is enclosed pump chamber, blade 4, cutting ferrule 7 and drive shaft are all disposed in pump chamber, and 7 device of cutting ferrule is in drive shaft axial sides, with drive Moving axis connects and can form annular groove between cutting ferrule 7 and drive shaft external cylindrical surface with drive shaft turns, and 4 one end of blade is hinged on On 3 inner wall of stator, the other end is clamped in a ring groove.

Referring to Fig. 3, stator 3 is cylindric and has coaxial tubular cavity, and positioned at the two of tubular cavity two sides A mounting surface is equably provided with multiple cylinder grooves 31 along axial direction on inner wall, for hinged with blade 4.It is offered on stator Channel 32, channel 32 are connected to the inner wall of two mounting surfaces and stator 3 of stator 3.

Fig. 4 schematically shows the structure of blade 4, one end of blade 4 is provided with the cylinder matched with cylinder groove 31 Hinge 41 forms blade 4 and stator 3 hingedly by the way that cylinder hinge 41 to be inserted into the cylinder groove 31 of 3 inner wall of stator；Blade 4 The other end is provided with cylindrical trunnion 42, and trunnion 42 is inserted into annular groove and is connected on the external cylindrical surface of the rotor 8, and can It is swung with the rotation of annular groove, the preferably diameter of trunnion 42 and the radial width of annular groove is equal.

It is hinged between stator 3 and blade 4, there can also be cylinder hinge by axially disposed on the inner wall of stator 3, together When blade 4 one end be provided with 41 cylinder grooves 31 that match of cylinder hinge, cylinder hinge 41 is inserted into cylinder groove 31, thus Realize that blade 4 and stator 3 are formed hingedly.

In the rotatable tubular cavity that stator 3 is arranged in of drive shaft, referring to Fig. 5, drive shaft includes shaft 9 and consolidates Rotor 8 of the Dingan County in shaft 9, rotor 8 is driven by shaft 9 and is rotated with it, as shown in Figure 1, the cylinder of shaft 9 and stator 3 The coaxial arrangement of shape space, the axis of shaft 9 is parallel with the axis of rotor 8 without being overlapped, and distance between the two is eccentricity one, When rotor 8 rotates in pump chamber with the rotation of shaft 9, i.e., 8 axis of rotor is rotated around 3 axis of stator, in the process, rotor 8 The radial distance of external cylindrical surface and 3 inner wall of stator rotates and generating period sexually revises with shaft 9.

As shown in fig. 6, cutting ferrule 7 be it is cylindric, offer circular groove 72, circular groove 72 on an end face of cutting ferrule 7 Diameter be greater than rotor 8 diameter, the axis of circular groove 72 it is parallel with the axis of cutting ferrule 7 without coincidence, between the two away from From referred to as eccentricity two, eccentricity two is equal with eccentricity one.72 notch of circular groove of two cutting ferrules 7 relatively determining by device The two sides of son 3 and 8 axial direction of rotor offer the axis hole 1 passed through for shaft 9, axis on the end face of two cutting ferrules 7 Hole 1 and 7 external cylindrical surface of cutting ferrule are coaxial, and the both ends of shaft 9 are inserted into respectively in axis hole 1.The bottom of two circular grooves 72 Face and two end faces of rotor 8 respectively fit, and drive cutting ferrule 7 to rotate with it when drive shaft turns, the inside of circular groove 72 Annular groove is formed between wall and the external cylindrical surface of rotor 8, while circular groove 72 and rotor 8 are coaxial.Two mounting surfaces of stator 3 The end face with cutting ferrule 7 is slidably matched respectively, makes to relatively rotate between cutting ferrule 7 and stator 3, while having preferable sealing Property.

In the present solution, cutting ferrule 7 can be mounted on rotor 8 (as being coupled by card slot and bayonet), driven by rotor 8 Dynamic cutting ferrule 7 rotates, and uses transition fit between shaft 9 and axis hole 1 at this time；Or by the way that cutting ferrule 7 is mounted in shaft, Such as make using interference fit connection between shaft 9 and axis hole 1, or using key connection or spline connection, driven by shaft 9 Cutting ferrule 7 rotates；Or above-mentioned two scheme is combined, while driving cutting ferrule 7 to rotate by rotor 8 and shaft 9.

As is seen in figs 7-10, flow side plate is cylindric, one end face offers the groove 21 matched with cutting ferrule 7, Multiple assignment holes 22, axial direction of the assignment hole 22 along flow side plate are offered between flow side plate external cylindrical surface and the side of groove 21 It opens up, and penetrates through two end faces of flow side plate.Flow side plate includes preceding flow side plate 5(such as Fig. 7-8) and rear flow side plate 2 (such as Fig. 9-10), the center of preceding flow side plate 5 are also provided with the axis hole 2 51 matched with shaft 9, preceding flow side plate 5 It is equipped with tapping valve 23 in the assignment hole 22, is equipped with liquid sucting valve 24 in the assignment hole 22 of the rear flow side plate 2；Liquid sucting valve 24 or tapping valve 23 check valve or combination valve can be selected；21 notch of groove of preceding flow side plate 5 and rear flow side plate 2 is relatively pacified Mounted in 3 axial sides of stator, shaft 9 is inserted into axis hole 2 51, and two flow side plates and stator 3 are enclosed pump chamber, is pumped Room is connected to by the channel (32) with assignment hole (22).

In above scheme, axis hole two can also be offered on rear flow side plate.

The working chamber of sealing, work are formed between two adjacent blades 4, the inner wall of stator 3,8 external cylindrical surface of rotor and two cutting ferrules 7 Make chamber to be connected to the assignment hole 22 on preceding flow side plate 5 and rear flow side plate 2 respectively by the channel (32).

If Figure 11-12 schematically shows the structure of end cap, end-cap fixture is enclosed in stator 3 with valve plate Pump chamber axial two outside, end cap includes drive end bearing bracket 6(such as Figure 11) and rear end cap 1(such as Figure 12), drive end bearing bracket is also opened at 6 center Equipped with the axis hole 3 63 matched with shaft 9, shaft 9 is connected after being pierced by from axis hole 3 63 with power mechanism.It can also divide Axis hole 3 63 is not opened up on drive end bearing bracket and rear end cap.

Drive end bearing bracket 6 is fixedly connected with front thrust plate, and rear end cap 1 is fixedly connected with rear thrust plate.The row of offering on drive end bearing bracket 6 Liquid channel, apocenosis passage include the leakage fluid dram 61 and high-voltage oil cavity 62 being connected, and leakage fluid dram 61 is to be provided with drive end bearing bracket 6 radially Through-hole, high-voltage oil cavity 62 is the annular groove being provided on 6 axial end face of drive end bearing bracket, and leakage fluid dram 61 is by high-voltage oil cavity 62 and matches Discharge orifice 22 is connected to；Imbibition channel is offered on rear end cap 1, imbibition channel includes the liquid sucting port 11 and low pressure oil pocket being connected, and is inhaled Liquid mouth 11 is to be provided with the through-hole of rear end cap 1 radially, and low pressure oil pocket is the annular groove being provided on 1 axial end face of rear end cap, The liquid sucting port 11 is connected to by low pressure oil pocket with assignment hole 22.

As shown in Figure 1, channel 32 can be designed as the shape of similar tee tube, one is provided with 3 inner wall of stator On, other two opening is provided with respectively on two mounting surfaces of stator 3, to by two mounting surfaces of stator 3 and determine simultaneously The inner wall of son 3 is connected to, and is both provided with channel 32 between each adjacent blades 4, is made working chamber that can be respectively communicated with imbibition channel and row Liquid channel.

Channel 32 can also be designed as including channel one and channel two, one one end of channel is provided with stator 3 On inner wall, on a mounting surface for being provided with stator 3 for the other end, the inner wall of stator 3 is connected to the mounting surface；Channel Two one end are provided on the inner wall of stator 3, and being provided on another mounting surface of stator 3 for the other end will be determined The inner wall of son 3 is connected to the mounting surface.It is provided with channel one and channel two simultaneously between two adjacent blades 4, makes working chamber can It is respectively communicated with imbibition channel and apocenosis passage.

In general, in order to which convenient processing and manufacture, liquid sucting port 11 and leakage fluid dram 61 are both designed as circular hole, and aperture phase Together, but in order to reduce the resistance at liquid sucting port, it is ensured that oil suction is unobstructed, the aperture of liquid sucting port 11 can be increased, keep its through-flow Sectional area is greater than the cross-sectional flow area of leakage fluid dram 61.

When shaft 9 rotates, while rotor 8 and cutting ferrule 7 being driven to rotate, due to 3 eccentric setting of rotor 8 and stator, rotor 8 The radial distance of external cylindrical surface and 3 inner wall of stator is sexually revised as shaft 9 rotates generating period, thus with movable vane piece 4 around cylinder Hinge 41 is swung along 8 external cylindrical surface of rotor, and adjacent blades 4 is also made to generate the instantaneous deflection being not quite similar around respective cylinder hinge 41 Angle, the volume so as to cause each working chamber change；When working chamber volume increases, its internal formation negative pressure, makes the work Make to be connected to the liquid sucting valve 24 in the assignment hole 22 in imbibition channel in chamber to open, the working chamber is connected to imbibition channel, and inhales Enter liquid；When working chamber volume reduces, the work cavity pressure increases, and makes to be connected to matching for apocenosis passage in the working chamber Tapping valve 23 in discharge orifice 22 is opened, and the working chamber is connected to apocenosis passage, and liquid is discharged；8 axis every revolution of rotor, The volume of each working chamber increase and reduce it is each primary, to realize an imbibition and a drain.

The trunnion 42 of blade 4 is rolled along annular groove, can be born a part of lateral force of blade 4, be improved 4 lower end of blade Stress condition, alleviate the abrasion of blade 4 lower end and bearing outer ring.Annular groove works as blade to the effect of contraction of blade 4 simultaneously When 4 trunnion 42 is rolled along annular groove, annular groove is applied to 4 one support reactions of blade, when so that 8 axis of rotor rotating, under blade 4 End can abut needle bearing outer ring, avoid larger between the excessive caused blade 4 of the pump centrifugal force of traditional blades 4 and stator 3 Abrasion, improves functional reliability, extends the service life of pump.

Constraint due to 4 lower end of blade by annular groove, is kept in contact with rotor 8 always, it is no longer necessary to which centrifugal force is by leaf Piece 4 is thrown away, therefore can be worked compared with low engine speed range, to widen the range of speeds of the pump of blade 4.

It preferably, can be in 8 external cylindrical surface device rolling bearing 10 of rotor, preferably rolling bearing 10 and 8 external cylindrical surface of rotor Transition fit, blade 4 is connected on the outer ring of rolling bearing 10 by trunnion 42, and can be swung with the rotation of annular groove. At this point, forming the working chamber of sealing between two adjacent blades 4, the inner wall of stator 3, the external cylindrical surface of rotor 8 and two cutting ferrules 7.By In 3 eccentric setting of rotor 8 and stator, when rotor 8 is rotated around 3 axis of stator, the axis of rolling that is in contact with 8 external cylindrical surface of rotor 10 are held and then to rotate together, external cylindrical surface, 10 outer ring of rolling bearing and the annular groove of rotor 8 and 3 inner wall of stator it is radial away from It is sexually revised from as shaft 9 rotates generating period, to occur around cylinder hinge 41 along 10 external cylindrical surface of rolling bearing with movable vane piece 4 It swings, the volume so as to cause each working chamber changes；When working chamber volume increases, its internal formation negative pressure, makes described The liquid sucting valve 24 being connected in the assignment hole 22 in imbibition channel in working chamber is opened, and the working chamber is connected to imbibition channel, and Suck liquid；When working chamber volume reduces, the work cavity pressure increases, and makes to be connected to apocenosis passage in the working chamber Tapping valve 23 in assignment hole 22 is opened, and the working chamber is connected to apocenosis passage, and liquid is discharged；8 every turn of axis one of rotor Turn, the volume of each working chamber increase and reduce it is each primary, to realize an imbibition and a drain.

Rolling friction between 8 external cylindrical surface of blade 4 and rotor is converted to rolling element and bearing by above-mentioned preferred embodiment Rolling friction between outer ring and/or inner ring further decreases the frictional force that blade 4 is subject to, and improve blade 4 uses the longevity Life.

The preferred needle bearing of above-mentioned rolling bearing 10, needle bearing radial structure is compact, internal diameter and load-carrying ability When identical as other types bearing, it is minimum to occupy annular slot space for minimum outer diameter.

In embodiment shown in FIG. 1, one rolling bearing 10 of device in drive shaft.In practical applications, according to difference The case where require, multiple rolling bearings 10 also can be set in drive shaft.

By changing blade construction in the present invention, and rolling bearing is arranged in rotor surface, by blade along the sliding of rotor slot It is changed into the swing that blade is cut with scissors around cylinder, becomes sliding friction as rolling friction, while the annular groove between cutting ferrule and rolling bearing One end of blade is connected to rolling bearing outer surface, improves vane stress situation, avoids traditional blades pump blade along diameter Big and stuck phenomenon is worn caused by sliding to slot, improves the intensity of drive shaft, the mechanical efficiency of pump and service life, is sealed Effect is good.

In the description of the present invention, it is to be understood that, term " on ", "lower", "front", "rear", "left", "right", " perpendicular Directly ", the orientation or positional relationship of the instructions such as "horizontal", "top", "bottom" "inner", "outside", " circumferential direction " is side based on the figure Position or positional relationship, are merely for convenience of description of the present invention and simplification of the description, rather than the device or member of indication or suggestion meaning Part must have a particular orientation, be constructed and operated in a specific orientation, therefore be not considered as limiting the invention.

In the present invention unless specifically defined or limited otherwise, term " installation ", " connected ", " connection ", " fixation " etc. Term shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integral；It can be mechanical connect It connects, is also possible to be electrically connected；It can be directly connected, can also can be in two elements indirectly connected through an intermediary The interaction relationship of the connection in portion or two elements, unless otherwise restricted clearly.For those of ordinary skill in the art For, the specific meanings of the above terms in the present invention can be understood according to specific conditions.

In the present invention unless specifically defined or limited otherwise, fisrt feature in the second feature " on " or " down " can be with It is that the first and second features directly contact or the first and second features pass through intermediary mediate contact.Moreover, fisrt feature exists Second feature " on ", " top " and " above " but fisrt feature be directly above or diagonally above the second feature, or be merely representative of First feature horizontal height is higher than second feature.Fisrt feature can be under the second feature " below ", " below " and " below " One feature is directly under or diagonally below the second feature, or is merely representative of first feature horizontal height less than second feature.

In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show The description of example " or " some examples " etc. means specific features, structure, material or spy described in conjunction with this embodiment or example Point is included at least one embodiment or example of the invention.In the present specification, schematic expression of the above terms are not It must be directed to identical embodiment or example.Moreover, particular features, structures, materials, or characteristics described can be in office It can be combined in any suitable manner in one or more embodiment or examples.In addition, without conflicting with each other, the skill of this field Art personnel can tie the feature of different embodiments or examples described in this specification and different embodiments or examples It closes and combines.

Although the embodiments of the present invention has been shown and described above, it is to be understood that above-described embodiment is example Property, it is not considered as limiting the invention, those skilled in the art within the scope of the invention can be to above-mentioned Embodiment is changed, modifies, replacement and variant.

Claims

1. a kind of vane type volumetric pump characterized by comprising

Stator (3) has tubular cavity and two mounting surfaces positioned at tubular cavity two sides, offers on the stator logical Road (32), the channel (32) are connected to the inner wall of two mounting surfaces and the stator (3)；

Drive shaft, it is rotatable to be arranged in the tubular cavity of the stator (3)；The drive shaft include rotor (8) and The shaft (9) being mounted on the rotor (8), the shaft (9) and the tubular cavity of the stator (3) are coaxial, the rotor (8) axis is parallel with the axis of the stator (3) tubular cavity without being overlapped, and distance between the two is eccentricity one, institute Rotor (8) is stated to be driven by the shaft (9) and rotated；

Cutting ferrule (7) offers circular groove (72), the circular groove on an end face of the cutting ferrule (7) to be cylindric (72) axis is parallel with the axis of the cutting ferrule (7) external cylindrical surface without being overlapped, and distance between the two is eccentricity two, institute It is equal with the eccentricity one to state eccentricity two, the cutting ferrule (7) is set as two, the circular groove of two cutting ferrules (7) (72) notch relatively two sides of the device in the stator (3) and the rotor (8) in axial direction, two circular grooves (72) bottom surface is bonded with two end faces of the rotor (8) respectively, and whens drive shaft turns drives the cutting ferrule (7) therewith Rotation, forms annular groove, the circle is recessed between the inner sidewall of the circular groove (72) and the external cylindrical surface of the rotor (8) Slot (72) and the rotor (8) are coaxial；Two mounting surfaces of the stator (3) end with two cutting ferrules (7) respectively Face is slidably matched；

Flow side plate, to be cylindric, one end face is opened up fluted (21), the flow side plate external cylindrical surface and the groove (21) multiple assignment holes (22) for running through the flow side plate both ends of the surface are offered between side, flow side plate is matched before including Side plate (5) and rear flow side plate (2) are flowed, is equipped with tapping valve (23) in the assignment hole (22) of the preceding flow side plate (5), institute State in the assignment hole (22) of rear flow side plate (2) and be equipped with liquid sucting valve (24), the preceding flow side plate (5) and/or it is described after The center of flow side plate (2) is also provided with the axis hole two (51) matched with the shaft (9)；The preceding flow side plate (5) with Two groove (21) notches of flow side plate (2) are relatively mounted on the two sides of the stator (3) axial direction after described, with institute It states stator (3) and is enclosed pump chamber, the pump chamber is connected to by the channel (32) with the assignment hole (22)；

Multiple blades (4), one end are hinged on the inner wall of the stator (3) along the axial direction of the stator (3), and can be with respect to institute Stator (3) rotation is stated, the other end of the blade (4) is provided with cylindrical trunnion (42), the diameter of the trunnion (42) and institute The width radially for stating annular groove is equal, and the trunnion (42) is inserted into the annular groove and can be with turn of the annular groove It moves and swings；

Working chamber is formed between two adjacent blades (4), the inner wall of stator (3), the external cylindrical surface of rotor (8) and two cutting ferrules (7), institute Working chamber is stated to be connected to by the channel (32) with institute's assignment hole (22)；

End cap, fixed device is in axial two outside of the pump chamber, including drive end bearing bracket (6) and rear end cap (1), the drive end bearing bracket (6) And/or axis hole three (63) is also provided on rear end cap (1)；The shaft (9) is pierced by from the axis hole three (63), in the front end Apocenosis passage and imbibition channel, the apocenosis passage and the imbibition channel point are respectively set on lid (6) and the rear end cap (1) The assignment hole (22) is not passed sequentially through and the channel (32) are connected to the working chamber；

When the shaft (9) drives the rotor (8) rotation, external cylindrical surface and the stator (3) inner wall of the rotor (8) Radial distance generating period sexually revises, and the rotor (8) drives the blade (4) to swing around with the articulated section of stator (3) inner wall.

2. vane type volumetric pump according to claim 1, which is characterized in that set on the inner wall of the stator (3) along axial direction It is equipped with cylinder groove (31), one end of the blade (4) is provided with the cylinder hinge (41) matched with cylinder groove (31), the cylinder Hinge (41) is inserted into cylinder groove (31), forms the blade (4) and the stator (3) hinged.

3. vane type volumetric pump according to claim 1, which is characterized in that set on the inner wall of the stator (3) along axial direction It is equipped with cylinder hinge (41), one end of the blade (4) is provided with the cylinder groove (31) matched with cylinder hinge (41), the cylinder Hinge (41) is inserted into cylinder groove (31), forms the blade (4) and the stator (3) hinged.

4. vane type volumetric pump according to claim 1, which is characterized in that at least one in two cutting ferrules (7) End face on offer axis hole (71), the shaft (9) is inserted into the axis hole (71).

5. vane type volumetric pump according to claim 4, which is characterized in that between the shaft (9) and axis hole one (71) Using transition fit or interference fit connection, or using key connection.

6. vane type volumetric pump according to claim 1, which is characterized in that rotor (8) external device (ED) has the axis of rolling It holds (10), the blade (4) is connected on the outer ring of the rolling bearing (10).

7. vane type volumetric pump according to claim 1, which is characterized in that the imbibition channel is arranged in the rear end cap (1) on, it includes the liquid sucting port (11) and low pressure oil pocket (12) being connected, and the liquid sucting port (11) is to be provided with the rear end cap (1) through-hole radially, the low pressure oil pocket (12) are the annular groove being provided on the rear end cap (1) end face, the imbibition Mouth (11) is connected to by the low pressure oil pocket (12) with the assignment hole (22)；The apocenosis passage is arranged in the drive end bearing bracket (6) on, it includes the leakage fluid dram (61) and high-voltage oil cavity (62) being connected, and the leakage fluid dram (61) is to be provided with the drive end bearing bracket (6) through-hole radially, the high-voltage oil cavity (62) are the annular groove being provided on the drive end bearing bracket (6) end face, the drain Mouth (61) is connected to by the high-voltage oil cavity (62) with the assignment hole (22).

8. vane type volumetric pump according to claim 6, which is characterized in that the rolling bearing (10) is needle bearing.

9. vane type volumetric pump according to claim 1, which is characterized in that the channel (32) is simultaneously by the stator (3) two mounting surfaces are connected to the inner wall of the stator (3).

10. being pumped according to vane type volumetric described in claim 1, which is characterized in that the channel (32) includes channel one and channel Two, the inner wall of the stator (3) is connected to by the channel one with a mounting surface of the stator (3), and the channel two is by institute The inner wall for stating stator (3) is connected to another mounting surface of the stator (3).