CN102102722A

CN102102722A - Rub-impact damping protection device for high-speed rotating machinery

Info

Publication number: CN102102722A
Application number: CN 201110038549
Authority: CN
Inventors: 蒋书运
Original assignee: Southeast University
Current assignee: Southeast University
Priority date: 2011-02-16
Filing date: 2011-02-16
Publication date: 2011-06-22
Anticipated expiration: 2031-02-16
Also published as: CN102102722B

Abstract

The invention discloses a rubbing and damping protection device for high-speed rotating machinery, which comprises an upper cover plate, a lower cover plate, a casing, a slider, a rubbing ball head and a metal rubber ring, and the casing and the slider are both ring-shaped , the middle part of the upper cover is provided with an upper through hole, the middle part of the lower cover is provided with a lower through hole, the upper end of the housing is fixedly connected with the upper cover, the lower end of the housing is fixedly connected with the lower cover, the slider is located in the housing, and the slider Embedded between the upper cover and the lower cover, there is a gap between the slider and the shell, the metal rubber ring is placed in the gap, the rubbing ball is located on the inner wall of the slider, and the head of the rubbing ball faces The axis of the slider, and the distance from the head of the rubbing ball head to the axis are respectively smaller than the radius of the upper through hole and the radius of the lower through hole. The rubbing and damping protection device of this structure not only plays a role in limiting the rotation of the rotor, but also has the performance of a strong damping effect, which helps to improve the safety of the operation of the rotor system.

Description

A kind of be used for high-speed rotating machine bump frictional resistance Buddhist nun protective gear

Technical field

The invention belongs to the component of machine technical field, specifically, relate to a kind of be used for high-speed rotating machine bump frictional resistance Buddhist nun protective gear.

Background technique

In recent years, along with developing rapidly of nuclear industry, aviation industry, power industry, shipping industry, field of petrochemical industry, various rotating machineries such as centrifuge, turbo machine, accumulated energy flywheel, develop towards directions such as high speed, high power to weight ratio.In the running of rotor-support-foundation system, when the influence that is subjected to external excitation, rotor vibration exceeding the standard occurs or the motion unstable phenomenon happens occasionally, if do not controlled, very easily causes catastrophic failure.At present, exceed standard or the generation of motion unstable phenomenon for fear of rotor oscillation, a way of employing is to introduce the friction protective gear in rotor-support-foundation system.The friction protective gear can be divided into two classes: a class is the sliding friction protective gear: by the stop collar that teflon, graphite or bronze are made, stop collar is fixed on stator, and rotor is arranged in stop collar, and leaves certain interval between rotor and the stop collar.Stop collar mainly plays certain position limitation protection effect.Owing to lack damping member in the stop collar, rotor is difficult for getting back to fast the equilibrium position.The life-span of the friction ring on the stop collar is shorter in addition; Another kind of is the rolling friction protective gear: the rolling bearing that this device is promptly commonly used.Rolling bearing can play position-limiting action, and can solve wear problem, but since damping effect a little less than, so the damping effect that rubs of crashing is very limited.

Summary of the invention

Technical problem:Technical problem to be solved by this invention is: provide a kind of be used for high-speed rotating machine bump frictional resistance Buddhist nun protective gear; this device is when playing position-limiting action to rotor rotation; also have the strong performance of damping effect, help to improve the Security of rotor-support-foundation system operation.

Technological scheme:For solving the problems of the technologies described above, the technical solution used in the present invention is: the frictional resistance Buddhist nun protective gear that bumps that is used for high-speed rotating machine of the present invention comprises upper cover plate, lower cover plate, shell, slide block, bumps rub bulb and metal-rubber ring, shell and slide block are ring, the upper cover plate middle part is provided with through hole, the lower cover plate middle part is provided with lower through-hole, and shell, slide block, last through hole and lower through-hole are coaxial; Fixedly connected with upper cover plate in the upper end of shell, fixedly connected with lower cover plate in the lower end of shell, slide block is arranged in shell, and slide block is embedded between upper cover plate and the lower cover plate, leave the gap between slide block and the shell, the metal-rubber ring is placed in this gap, bumps on the inwall that the bulb that rubs is positioned at slide block, bump the axis of the head of the bulb that rubs towards slide block, and the head that bumps the bulb that rubs to the distance of axis respectively less than the radius of last through hole and the radius of lower through-hole.

Described be used for high-speed rotating machine bump frictional resistance Buddhist nun protective gear, be marked with damping oil in the gap between described shell and slide block.

Beneficial effect:Compared with prior art, adopt the beneficial effect of technological scheme of the present invention to be: 1. when rotor rotation is played position-limiting action, also have the strong performance of damping effect, help to improve the Security of rotor-support-foundation system operation.Except rub bulb and slide block are bumped in setting, also be provided with the metal-rubber ring in the technological scheme of the present invention.Rotor when running well, rotor and bump bumping in the frictional resistance Buddhist nun protective gear and rub gapped between the bulb.When the vibration exceeding the standard of rotor, rotor will collide the bulb that rubs, and bumps the bulb driving sliding block motion that rubs, and the existing radial motion of slide block has the hoop motion again.Slide block extrusion metal rubber ring.The metal-rubber ring applies the surface friction of high acceleration to slide block, stops the motion of slide block.Bumping in the frictional resistance Buddhist nun protective gear of this structure bumped the bulb that rubs rotor played position-limiting action, and the metal-rubber interannular connects rotor is played damping function, helps to improve the Security of rotor-support-foundation system operation.

2. damping is very obvious.The technical program can be added damping oil in the gap between shell and the slide block.Damping oil can improve the frictional force of whole metal-rubber ring when motion, helps the fast quick-recovery proper motion of rotor state.

3. whole apparatus structure is simple, with low cost, and the life-span is long.In the technical program, whole device can only comprise upper cover plate, lower cover plate, shell, slide block, bump rub bulb and six parts of metal-rubber ring, and is easy to assembly, with low cost.Simultaneously, bump rub bulb and slide block and rotate together, thereby slow down rotor and bump the rubbing action that rubs between the bulb, prolong the working life of bumping the bulb that rubs.

Description of drawings

Fig. 1 is a longitudinal sectional view of the present invention.

Fig. 2 is a plan view of the present invention.

Have among the figure: lower cover plate 1, oil seal ring 2, metal-rubber ring 3, shell 4, damping oil 5, screw 6, upper cover plate 7, gap 8, bump the bulb 9 that rubs, go up through hole 10, slide block 11, lower through-hole 12.

Embodiment

As depicted in figs. 1 and 2, of the present invention a kind of be used for high-speed rotating machine bump frictional resistance Buddhist nun protective gear, comprise upper cover plate 7, lower cover plate 1, shell 4, slide block 11, bump rub bulb 9 and metal-rubber ring 3.Shell 4 and slide block 11 are ring.Upper cover plate 7 middle parts are provided with through hole 10, and lower cover plate 1 middle part is provided with lower through-hole 12.Last through hole 10 and lower through-hole 12 are circular port.Bumping rub bulb 9 preferred bronze, graphite or polytetrafluoroethylmaterial material makes.Shell 4, slide block 11, last through hole 10 and lower through-hole 12 are coaxial.Fixedlying connected with upper cover plate 7 in the upper end of shell 4, fixedlys connected with lower cover plate 1 in the lower end of shell 4.Fixedly connected mode can have multiple, for example adopts screw 6 to connect.Slide block 11 is arranged in shell 4, and slide block 11 is embedded between upper cover plate 7 and the lower cover plate 1.The upper-end surface of slide block 11 is relative with the bottom surface of upper cover plate 7, and touch mutually with the end face of lower cover plate 1 lower end surface of slide block 11, leaves gap 8 between the inwall of the outer wall of slide block 11 and shell 4.Metal-rubber ring 3 is placed in the gap 8.Bump the bulb 9 that rubs and be positioned on the inwall of slide block 11, bump the axis of the head of the bulb 9 that rubs towards slide block 11.The head that bumps the bulb 9 that rubs is to the distance of the slide block 11 axis radius less than last through hole 10, and the head that bumps the bulb 9 that rubs is to the distance of the slide block 11 axis radius less than lower through-hole 12.That is to say, be the head that bumps the bulb 9 that rubs apart from the nearest part of slide block 11 axis.

That uses said structure bumps frictional resistance Buddhist nun protective gear, and need be fixed is connected on the stator, and this bumps the centre of frictional resistance Buddhist nun protective gear the rotor suit.Even it is overlapping that the axis of rotor and this bump the axis of frictional resistance Buddhist nun protective gear.During work, rotor rotates, rotor when running well, rotor and bump bumping in the frictional resistance Buddhist nun protective gear and rub gapped between the bulb 9.When the vibration exceeding the standard of rotor, rotor will collide the bulb 9 that rubs, and bumps bulb 9 driving sliding block 11 motions that rub, and slide block 11 existing radial motions have the hoop motion again.Slide block 11 extrusion metal rubber rings 3.3 pairs of slide blocks 11 of metal-rubber ring apply the surface friction of high acceleration, stop the motion of slide block 11.Bumping in the frictional resistance Buddhist nun protective gear of this structure bumps the 9 pairs of rotors of bulb that rub and play position-limiting action, and metal-rubber ring 3 played damping function to rotor indirectly.In a word, this device also has the strong performance of damping effect when rotor rotation is played position-limiting action, helps to improve the Security of rotor-support-foundation system operation.In addition, bump rub bulb 9 and slide block 11 and rotate together, thereby slow down rotor and bump the rubbing action that rubs between the bulb 9, prolong the working life of bumping the bulb 9 that rubs.

Further, in order to strengthen damping, be marked with damping oil 5 in the gap 8 between shell 4 and slide block 11.Like this, metal-rubber ring 3 is immersed in the damping oil 5.When rotor is run into the bulb 9 that rubs, damping oil 5 can be strengthened dampings, makes slide block 11 moving on metal-rubber ring 3 inwalls, and metal-rubber ring 3 moves difficulty more on shell 4 inwalls.Especially, the liquid level of damping oil 5 is higher than the end face of metal-rubber ring 3.Like this, whole metal-rubber ring 3 all is immersed in the damping oil 5, and the damping of metal-rubber ring 3 is the strongest.

Further,, avoid damping oil 5 to reveal, an oil seal ring 2 is set on the surface of contact of lower cover plate 1 and slide block 11, another oil seal ring 2 is set on the surface of contact of lower cover plate 1 and shell 4 in order to guarantee the damping of damping oil 5.By two oil seal rings 2 are set, damping oil 5 is confined to fully can not revealed by the slit in the gap 8 between shell 4 and the slide block 11.

Further, described to bump the bulb 9 that rubs be four, along the middle part that circumferentially is evenly arranged in slide block 11 inwalls.Be provided with four at the middle part of slide block 11 inwalls along periphery and bump the bulb 9 that rubs, can guarantee when rotor oscillation exceeds standard, bump the bulb 9 that rubs and to play position-limiting action and damping function to rotor efficiently.

Bottom and slide block 11 interference fit for the bulb 9 that guarantees connection stability, bump to rub.Like this, even rotor is run into when rubbing bulb 9 at high rotating speed, bump the bulb 9 that rubs and also be difficult for coming off from slide block 11.

Claims

1. A rubbing and damping protection device for high-speed rotating machinery, characterized in that it includes an upper cover (7), a lower cover (1), a casing (4), a slider (11), and a rubbing ball head (9) and the metal rubber ring (3), the shell (4) and the slider (11) are all ring-shaped, the upper cover (7) is provided with an upper through hole (10) in the middle, and the lower cover (1) middle A lower through hole (12) is provided, and the shell (4), slider (11), upper through hole (10) and lower through hole (12) are coaxial; the upper end of the shell (4) is fixed to the upper cover plate (7) connection, the lower end of the casing (4) is fixedly connected with the lower cover (1), the slider (11) is located in the casing (4), and the slider (11) is embedded in the upper cover (7) and the lower cover (1 ), there is a gap (8) between the slider (11) and the housing (4), the metal rubber ring (3) is placed in the gap (8), and the friction ball head (9) is located on the slider (11 ), the head of the rubbing ball head (9) faces the axis of the slider (11), and the distance from the head of the rubbing ball head (9) to the axis is smaller than the radius of the upper through hole (10) and the radius of the lower through hole (12).

2. The rubbing and damping protection device for high-speed rotating machinery according to claim 1, characterized in that damping is injected into the gap (8) between the housing (4) and the slider (11) oil (5).

3. The rubbing and damping protection device for high-speed rotating machinery according to claim 2, characterized in that it also includes two oil sealing rings (2), and one oil sealing ring (2) is arranged on the lower cover plate (1) On the contact surface with the slide block (11), another oil sealing ring (2) is arranged on the contact surface between the lower cover plate (1) and the casing (4).

4. The rubbing and damping protection device for high-speed rotating machinery according to claim 3, characterized in that the liquid level of the damping oil (5) is higher than the top surface of the metal rubber ring (3).

5. The rubbing and damping protection device for high-speed rotating machinery according to claim 1, 2, 3 or 4, characterized in that there are four rubbing ball heads (9), which are evenly arranged along the circumferential direction In the middle of the inner wall of the slider (11).

6. The rubbing and damping protection device for high-speed rotating machines according to claim 5, characterized in that, the rubbing ball head (9) is made of bronze, graphite or polytetrafluoroethylene.

7. The rubbing and damping protection device for high-speed rotating machines according to claim 6, characterized in that the bottom of the rubbing ball head (9) is in interference fit with the slider (11).