CN217059138U - Axial force balancing device - Google Patents
Axial force balancing device Download PDFInfo
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- CN217059138U CN217059138U CN202220737857.1U CN202220737857U CN217059138U CN 217059138 U CN217059138 U CN 217059138U CN 202220737857 U CN202220737857 U CN 202220737857U CN 217059138 U CN217059138 U CN 217059138U
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Abstract
The utility model provides an axial force balancing device, which comprises a balancing box and a supporting component; the balance box is internally provided with a closed accommodating cavity and is used for being connected with a shell of the motor, an output shaft of the motor is inserted into the accommodating cavity, the support assembly is used for being sleeved on the output shaft, and the output shaft is connected with the support assembly so as to drive the support assembly to rotate; the supporting component and the inside wall butt that holds the chamber, supporting component and output shaft will hold the chamber jointly and separate for first cavity and second cavity, still have the air inlet on the box, air inlet and first cavity intercommunication, the tip of output shaft towards first cavity, the air inlet is used for the input gas to balanced axial force of exerting on the output shaft, second cavity and external intercommunication. The utility model provides an axial force balancing unit can balance the epaxial axial force of motor output, effectively improves the stability and the reliability of motor.
Description
Technical Field
The utility model relates to a rotating equipment's spare part test technical field especially relates to an axial force balancing unit.
Background
As science and technology develops, basic research equipment can be manufactured to simulate actual working conditions so as to perform performance research tests on key parts in the rotating equipment.
In order to test the performance of some key parts of the rotating equipment, the experimental device is directly driven by the rotating shaft of the output shaft of the motor, so that the parts to be tested of the experimental device rotate, and the working condition of high rotating speed is simulated. Because the relative motion speed and the load of the friction pair of the key parts of the parts to be tested in the rotating equipment are greatly improved, the corresponding basic research equipment for simulating the actual working condition to carry out performance research, such as a high-speed high-load friction wear test bed and a high-speed high-load sealing test bed, can usually generate larger axial force, and the axial force can finally act on the output shaft of the rotating shaft of the motor through the test device of the parts to be tested so as to enable the motor to bear larger axial force.
However, in the prior art, the service life of the motor bearing is shortened under the action of axial force, so that the risk of motor failure is increased, and the stability and reliability of the motor are reduced.
SUMMERY OF THE UTILITY MODEL
The utility model provides an axial force balancing unit can balance the epaxial axial force of motor output, effectively improves the stability and the reliability of motor.
The utility model provides an axial force balancing unit, include: comprises a balance box and a support component;
the balance box is internally provided with a closed accommodating cavity and is used for being connected with a shell of the motor, an output shaft of the motor is inserted into the accommodating cavity, the support component is used for being sleeved on the output shaft, and the output shaft is connected with the support component so as to drive the support component to rotate;
the supporting component and the inside wall butt that holds the chamber, supporting component and output shaft will hold the chamber jointly and separate for first cavity and second cavity, still have the air inlet on the balance box, air inlet and first cavity intercommunication, the tip of output shaft towards first cavity, the air inlet is used for the input gas to balanced axial force of exerting on the output shaft, second cavity and external intercommunication.
In a possible implementation manner, the axial force balancing device provided by the utility model comprises a support component and a support component, wherein the support component is sleeved in the support component;
the partial lateral wall of butt piece and the inside wall butt that holds the chamber, the output shaft includes coaxial coupling's connecting portion and spacing portion, and support piece and butt piece cover are on connecting portion, and partial connecting portion are located first cavity, and support piece is towards the partial terminal surface and the spacing portion butt of spacing portion.
In a possible implementation manner, the utility model provides an axial force balancing unit still includes coupling assembling, and coupling assembling includes first connecting piece and a plurality of second connecting piece, and first connecting piece cover is established on being located the connecting portion in first chamber, and first connecting piece and connecting portion are connected to the second connecting piece.
In a possible implementation manner, the utility model provides an axial force balancing unit, first connecting piece are the gland, and the second connecting piece is screw or bolt.
In a possible implementation manner, the utility model provides an axial force balancing unit, balanced case and bag include box and case lid, hold the chamber and lie in the box originally internally, and the case lid is established on the box and is held the chamber with the closure, and the case lid is connected with the box, and the air inlet lies in the case lid, and the bottom of box has the mounting hole, and output shaft part inserts and establishes in the mounting hole, and with the inside wall butt of mounting hole.
In a possible implementation manner, the utility model provides an axial force balancing unit still includes seal assembly, seal assembly is used for reducing the fluid that the clearance between the lateral wall of butt piece and the inside wall that holds the chamber flows out.
In a possible implementation manner, the utility model provides an axial force balancing unit, seal assembly include first sealing member, and the lateral wall of butt piece has first butt portion and second butt portion, and first butt portion and second butt portion are adjacent, and first sealing member is located between first butt portion and the inside wall that holds the chamber, and has the sealing member between the medial surface of first sealing member towards the tip of case lid and case lid.
In a possible implementation manner, the utility model provides an axial force balancing unit, seal assembly still include a plurality of second sealing members, and the second sealing member is located between second butt portion and the inside wall that holds the chamber.
In one possible implementation, the utility model provides an axial force balancing unit has the wearing layer in the second butt portion.
In a possible implementation manner, the utility model provides an axial force balancing unit still includes a plurality of soft separators, soft separator and second sealing member interval setting.
In a possible implementation manner, the utility model provides an axial force balancing unit, first sealing member are labyrinth seal, and the second sealing member is brush seal.
The utility model provides an axial force balancing unit, through with the supporting component setting in the holding intracavity of balancing tank, and the supporting component with insert and establish the output shaft who holds the intracavity motor, the output shaft can only drive the relative balancing tank rotation of supporting component when rotatory like this to in the shell fixed connection of balancing tank and motor. The output shaft through supporting component and motor will hold the chamber jointly and separate for mutually independent first cavity and second cavity, can make the inside pressure of first cavity and second cavity variation in size like this to form the pressure difference. By inputting high pressure gas into the first chamber, the high pressure gas may apply an axial force to the output shaft of the motor through the support assembly toward the motor housing. The axial force acting on the output shaft through the balance test cavity is balanced, so that the motor output shaft reaches a force balance state, the axial load of the motor output shaft can be effectively reduced, the motor bearing is prevented from being damaged under the action of the axial load, and other faults, the working efficiency of the motor is effectively improved, and the stability and the reliability of the electrode are improved.
Drawings
In order to clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the description below are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic diagram of a prior art motor and test chamber configuration;
fig. 2 is a schematic structural diagram of the axial force balancing device provided by the present invention;
fig. 3 is a schematic view of a usage state of the axial force balancing device provided by the present invention;
fig. 4 is a schematic connection diagram of the axial force balancing device and the motor provided by the present invention;
fig. 5 is a schematic structural diagram of a sealing assembly in the axial force balancing apparatus provided by the present invention.
Description of the reference numerals:
10-a motor; 20-a test chamber; 30-axial force balancing means;
110-an output shaft; a 111-connection portion; 112-a limiting part;
120-a housing;
210-a part to be tested;
311-a first chamber; 312-a second chamber; 313-an air inlet; 314-a box; 315-box lid; 316-one-way valve; 317-a pressure relief port;
321-an abutment; 322-a support member;
3211-a first abutment; 3212-a second abutment;
331-a first connector; 332-a second connector;
341-first seal; 342-a second seal; 343-a seal; 344-soft separator;
f1-axial force exerted on the output shaft by the axial force balancing device;
f2 — axial force exerted by the test chamber on the output shaft.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
In the description of the present application, it should be noted that unless otherwise specifically stated or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, such as to be capable of being fixedly connected, indirectly connected through intervening media, and capable of being connected through two elements or in a mutual relationship between two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
In the description of the present application, it is to be understood that the terms "upper", "lower", "front", "back", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present application and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present application.
The terms "first," "second," and "third" (if any) in the description and claims of this application and in the above-described drawings are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are, for example, capable of operation in sequences other than those illustrated or otherwise described herein.
Moreover, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or maintenance tool that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or maintenance tool.
As science and technology develops, basic research equipment can be manufactured to simulate actual working conditions so as to perform performance research tests on key parts in the rotating equipment. For example, closed test chambers can be manufactured, and parts to be tested can be placed in the test chambers, so that actual working conditions with high rotating speed and high load can be simulated through the test chambers. As shown in fig. 1, the testing chamber 20 is used for simulating the actual working condition of the part 210 to be tested, the part 210 to be tested is placed inside the testing chamber 20, one end of the testing chamber 20 is connected with the motor 10, and the part 210 to be tested inside the testing chamber 20 is directly driven to rotate by the output shaft 110 of the motor 10, so that the working condition of high rotating speed can be simulated. In addition, high-pressure gas is introduced into the other end of the test chamber 20 away from the motor 10, the high-pressure gas contacts with one side end face of the part to be tested 210 and applies pressure (in the direction indicated by a dotted arrow in fig. 1) to one side end face of the part to be tested 210, and after the pressure is converged together, an axial force acting on the part to be tested 210 is formed, so that a high-load working condition can be simulated.
Because the relative movement speed and the load of the friction pair of the key parts in the rotating equipment are greatly improved, the corresponding basic research equipment for simulating the actual working condition to carry out performance research, such as a high-speed high-load friction wear test bed and a high-speed high-load sealing test bed, usually generates a larger axial force, and the axial force finally acts on the output shaft 110 of the motor 10 through the part 210 to be tested, so that the motor 10 bears the larger axial force. Moreover, the axial force may cause a reduction in the life of the bearings of the motor 10, resulting in an increased risk of motor failure, reducing the stability and reliability of the motor 10.
Based on this, the present application provides an axial force balancing device, which is installed at the other end of the output shaft 110 of the motor 10 away from the test chamber 20, and generates an axial force towards the output shaft 110 of the motor 10 through the axial force balancing device, so that the axial force generated by the test chamber 20 can be balanced, and the output shaft 110 of the motor 10 is always in a force balanced state. So as to improve the bearing life of the motor 10 and thus improve the stability and reliability of the motor 10.
Examples
Fig. 2 is a schematic structural diagram of the axial force balancing device provided by the present invention; fig. 3 is a schematic view of a usage status of the axial force balancing device provided by the present invention, and fig. 4 is a schematic view of the connection between the axial force balancing device and the motor provided by the present invention. As shown in fig. 2-4, the present application provides an axial force balancing apparatus 30 comprising a balancing tank (not shown) and a support assembly (not shown); the balance box is internally provided with a closed accommodating cavity (not marked in the figure), the balance box is used for being connected with a shell 120 of the motor 10, an output shaft 110 of the motor 10 is inserted into the accommodating cavity, the support component is used for being sleeved on the output shaft 110, and the output shaft 110 is connected with the support component so as to drive the support component to rotate; the support component is abutted against the inner side wall of the accommodating cavity, the accommodating cavity is divided into a first cavity 311 and a second cavity 312 by the support component and the output shaft 110 together, the balance box is further provided with an air inlet 313, the air inlet 313 is communicated with the first cavity 311, the end part of the output shaft 110 faces the first cavity 311, the air inlet 313 is used for inputting air so as to balance the axial force applied to the output shaft 110, and the second cavity 312 is communicated with the outside.
During the concrete realization, surge tank and supporting component can be cylindric structure, and the setting can also be for cylindric in the chamber that holds of surge tank inside, and the supporting component setting is holding intracavity portion, and supporting component, the axis coincidence that holds chamber and surge tank three. One end of the balancing tank may be connected to the housing 120 of the motor 10 by screwing, riveting or welding. The axis of the output shaft 110 of the motor 10 can coincide with the axis of the accommodating cavity, so that the output shaft 110 of the motor 10 can be inserted into the accommodating cavity and connected with the supporting component in the accommodating cavity, the motor 10 can drive the output shaft 110 to rotate during working, and the output shaft 110 can drive the supporting component to rotate.
The outer side wall of the supporting component may abut against the inner side wall of the accommodating cavity, so that after the supporting component is sleeved on the output shaft 110, the accommodating cavity may be partitioned into a first cavity 311 and a second cavity 312 which are independent of each other, wherein the first cavity 311 and the second cavity 312 are respectively located at two opposite sides of the supporting component, and the second cavity 312 is close to the housing 120 of the motor 10.
After being pressurized, the high-pressure gas is input into the first chamber 311 through the gas inlet 313, the high-pressure gas gathered inside the first chamber 311 can apply pressure to the support assembly, the acting surface of the pressure is the end surface of the support assembly on the side away from the motor 10, and the acting direction of the pressure is the direction toward the motor 10 (the direction indicated by the dotted arrow in fig. 4). The pressure force, after being transmitted through the support assembly, is focused on the output shaft 110 of the motor 10 to form an axial force F1 along the axial direction of the output shaft 110 as shown in fig. 3, the axial force F1 is collinear with and acts in the opposite direction to the axial force F2 of the test chamber 20 acting on the output shaft 110 of the motor 10. The pressure of the high-pressure gas input into the first chamber 311 can be equal to the pressure of the high-pressure gas input into the test chamber 20, so that the axial force F1 and the axial force F2 generated at the two opposite ends of the output shaft 110 of the motor 10 can be equal in magnitude and opposite in direction, and the output shaft 110 of the motor 10 can reach a force balance state.
The second chamber 312 may be in communication with the external environment through a pressure relief port 317, such that the pressure in the second chamber 312 may be maintained at the same pressure as the atmospheric pressure in the external environment, thereby ensuring that the pressure in the first chamber 311 is greater than the pressure in the second chamber 312, such that the high pressure gas in the first chamber 311 may exert a pressure on the support assembly.
The axial force balancing device 30 provided by the present application sets up the support assembly in the containing cavity of the balance box, and the support assembly is connected with the output shaft 110 inserted in the containing cavity of the motor 10, so that the output shaft 110 can only drive the support assembly to rotate relative to the balance box when rotating, so as to facilitate the fixed connection of the balance box and the housing 120 of the motor 10. The holding cavity is divided into a first chamber 311 and a second chamber 312 which are independent of each other by the support assembly and the output shaft 110 of the motor 10, so that the pressure inside the first chamber 311 and the second chamber 312 can be different in magnitude to form a pressure difference. By inputting high-pressure gas into the first chamber 311, the high-pressure gas can apply an axial force F1 facing the housing 120 of the motor 10 to the output shaft 110 of the motor 10 through the support assembly, and balance the axial force F2 of the test chamber 20 acting on the output shaft 110 through the axial force F1, so that the output shaft 110 of the motor 10 reaches a force balance state, the axial load on the output shaft 110 of the motor 10 can be effectively reduced, the bearing of the motor 10 is prevented from being damaged and other faults under the action of the axial load, the working efficiency of the motor 10 is effectively improved, and the stability and reliability of the motor 10 are improved.
With reference to fig. 4, the supporting component includes an abutting part 321 and a supporting part 322, the supporting part 322 is sleeved in the abutting part 321, a part of the outer sidewall of the abutting part 321 abuts against the inner sidewall of the accommodating cavity, the output shaft 110 includes a connecting part 111 and a limiting part 112 which are coaxially connected, the supporting part 322 and the abutting part 321 are sleeved on the connecting part 111, a part of the connecting part 111 is located in the first cavity 311, and a part of the end surface of the supporting part 322 facing the limiting part 112 abuts against the limiting part 112.
Specifically, the support assembly may include an abutting part 321 and a support 322, and the abutting part 321 and the support 322 may be both cylindrical structures, and the axes of the abutting part 321 and the support 322 coincide. A circular groove (not shown) may be provided in the abutment 321, the axis of the circular groove coinciding with the line of the abutment 321. The support 322 may be received in the circular groove. The outer sidewall of the abutting member 321 can abut against the inner sidewall of the accommodating cavity, so that the abutting member 321 and the support member 322 together form a support assembly, and the first chamber 311 and the second chamber 312 can be independent from each other through the cooperation of the abutting member 321, the support member 322 and the output shaft 110.
In some embodiments, the supporting component may be an integrally formed member, that is, the abutting part 321 and the supporting part 322 may be integrated into one component, so that the assembling process of the axial force balancing device may be effectively reduced, and the assembling efficiency of the axial force balancing device is improved. The support assembly may be abutted against the output shaft 110 such that the receiving cavity may be partitioned into the first chamber 311 and the second chamber 312 by the support assembly and the output shaft 110 together.
The support assembly may have a first mounting hole (not identified in the figure) and a second mounting hole (not identified in the figure) which are communicated with each other, the inner diameter of the first mounting hole is equal to that of the second mounting hole, and the axes of the first mounting hole and the second mounting hole are coincident with the axis of the output shaft 110 of the motor 10. The first mounting hole may be located on the abutting member 321, and the second mounting hole may be located on the supporting member 322, so that the output shaft 110 can be sleeved together through the first mounting hole and the second mounting hole, so as to connect the output shaft 110 with the supporting member.
The output shaft 110 may include a connecting portion 111 and a limiting portion 112 that are coaxially connected, the connecting portion 111 may be sleeved in the first mounting hole and the second mounting hole, and the limiting portion 112 may abut against a side end portion of the support 322 adjacent to the limiting portion 112 to limit the support 322.
The support member 322 may be hollowed out to reduce the weight of the support member 322, which may limit the moment of inertia of the support member 322 at high rotational speeds.
As shown in fig. 4, the axial force balance device 30 further includes a connecting assembly (not shown), the connecting assembly includes a first connecting member 331 and a plurality of second connecting members 332, the first connecting member 331 is disposed on the connecting portion 111 located in the first chamber 311, and the second connecting member 332 connects the first connecting member 331 and the connecting portion 111. The first connecting member 331 is a gland, and the second connecting member 332 is a screw or a bolt.
In some embodiments, a coupling assembly may also be provided to couple the support assembly to the output shaft 110. The connecting assembly may include a first connecting member 331 and a second connecting member 332, wherein the first connecting member 331 may be sleeved on an end portion of the connecting portion 111 of the output shaft 110 inside the first chamber 311, and the first connecting member 331 abuts against a side of the abutting member 321 away from the supporting member 322, so as to limit the abutting member 321, and thus, the supporting assembly may be limited and fixed on the connecting portion 111 by a combined action of the first connecting member 331 and the second connecting member 332.
The second connecting member 332 may be used to fixedly connect the first connecting member 331 to the end of the connecting portion 111, and the number of the second connecting member 332 may be plural. Specifically, the first connecting member 331 may be a gland, the second connecting member 332 may be a screw, and a corresponding threaded hole (not shown) corresponding to the second connecting member 332 is further provided at the end of the connecting portion 111, so that the gland may be fixedly connected to the end of the connecting portion 111 through a threaded connection manner.
In some embodiments, the second connector 332 may be a bolt, and the bolt may be a bolt formed by screwing two round nuts together with a screw rod to form a bolt with a double round nut, and the bolt may be screwed into a threaded hole of the connecting portion 111, so that the gland may be fixedly connected to the end of the connecting portion 111 by means of the bolt. In addition, after the double-round nut is tightened, an axial force is generated between the two round nuts, and the axial force can increase the friction force between the threads of the double-round nut and the threads of the screw rod so as to prevent the double-round nut from loosening and falling off automatically.
The bolt can also be formed by screwing a single round nut, the stop washer and the screw together to form the bolt with the round nut, and after the round nut is screwed down, the stop washer can effectively prevent the round nut from loosening and falling off, so that the reliability of bolt connection is improved.
With reference to fig. 4, the balancing box includes a box 314 and a box cover 315, the accommodating cavity is located in the box 314, the box cover 315 covers the box 314 to close the accommodating cavity, the box cover 315 is connected to the box 314, the air inlet 313 is located on the box cover 315, a mounting hole (not shown) is formed in the bottom of the box 314, and the output shaft 110 is partially inserted into the mounting hole and abuts against an inner sidewall of the mounting hole.
In some embodiments, the balancing box may include a box 314 and a cover 315, the accommodating cavity is located in the body of the box 314, the box 314 further has an opening (not shown) communicating with the accommodating cavity, and the cover 315 may be covered on the opening to close the accommodating cavity. The supporting component can be sleeved in the accommodating cavity through the opening.
The cover 315 may be attached to the housing 314 by a threaded connection, a rivet connection, or a snap connection. A gasket (not shown) may be disposed between the cover 315 and the housing 314, which may effectively improve the sealing performance of the surge tank.
The mounting hole sets up in the bottom that box 314 deviates from case lid 315, and the mounting hole communicates with the chamber that holds, and the axis of mounting hole and the coincidence of the axis that holds the chamber. This may facilitate the insertion of the output shaft 110 of the motor 10 into the receiving cavity through the mounting hole.
Fig. 5 is a schematic structural diagram of a sealing assembly in the axial force balancing apparatus provided by the present invention, as shown in fig. 4 and 5, the axial force balancing apparatus 30 provided by the present invention further includes a sealing assembly (not identified in the figure) for reducing a fluid flowing out from a gap between an outer sidewall of the abutting part 321 and an inner sidewall of the accommodating cavity. The sealing assembly includes a first seal 341, an outer sidewall of the abutting part 321 has a first abutting part 3211 and a second abutting part 3212, the first abutting part 3211 and the second abutting part 3212 are adjacent to each other, the first seal 341 is located between the first abutting part 3211 and an inner sidewall of the accommodating cavity, and a seal 343 is provided between an end of the first seal 341 facing the case cover 315 and an inner sidewall of the case cover 315. The seal assembly further includes a plurality of second seals 342, the second seals 342 being located between the second abutment 3212 and the interior sidewall of the receiving cavity.
In this embodiment, since a gap exists between the outer sidewall of the abutting member 321 and the inner sidewall of the accommodating cavity, and a fluid may flow out of the gap, the sealing element is disposed between the outer sidewall of the abutting member 321 and the inner sidewall of the accommodating cavity, so that the sealing performance between the outer sidewall of the abutting member 321 and the inner sidewall of the accommodating cavity can be effectively improved, and the fluid flowing out of the gap is reduced, so that the first chamber 311 and the second chamber 312 can be relatively independent. The fluid may be a liquid or a gas, and in this embodiment, the fluid is a high-pressure gas.
The sealing assembly may include a first sealing member 341 and a plurality of second sealing members 342, the first sealing member 341 and the second sealing member 342 are both disposed between the outer sidewall of the abutting member 321 and the inner sidewall of the accommodating chamber, and the first sealing member 341 and the second sealing member 342 may effectively improve the sealing performance between the outer sidewall of the abutting member 321 and the inner sidewall of the accommodating chamber.
The first abutting portion 3211 and the second abutting portion 3212 are provided on outer side walls of the abutting pieces 321, an outer diameter of the first abutting portion 3211 is larger than an outer diameter of the second abutting portion 3212, the first seal 341 is provided between the first abutting portion 3211 and inner side walls of the accommodating chamber, and the plurality of second seals 342 are sequentially provided between the second abutting portion 3212 and the inner side walls of the accommodating chamber. This may further improve the sealing performance between the outer sidewall of the abutment member 321 and the inner sidewall of the receiving chamber by the cooperation of the first seal 341 and the second seal 342.
The end of the first seal 341 facing the cover 315 abuts the inner side of the cover 315, and a seal 343 may be provided between the first seal 341 and the cover 315, which may improve the sealing performance between the first seal 341 and the cover 315.
In bookIn one embodiment, the second abutting portion 3212 has a wear layer (not shown). Specifically, the wear resistant layer may be cadmium oxide (Cr) 2 O 3 ) Coating or aluminium oxide (Al) 2 O 3 ) The plating layer is not particularly limited in this respect. The wear layer may effectively increase the wear resistance of the second abutment 3212 so as to reduce frictional losses on the second abutment 3212.
With continued reference to fig. 5, the axial force balancing device 30 provided herein further includes a plurality of soft spacers 344, the soft spacers 344 being spaced apart from the second seal 342.
In a specific implementation, the soft spacers 344 may be rubber blocks, and the soft spacers 344 are disposed between the second sealing members 342 at intervals, so that the sealing performance between the plurality of second sealing members 342 may be effectively improved.
With continued reference to fig. 5, the first seal 341 is a labyrinth seal and the second seal 342 is a brush seal.
In this embodiment, the first seal 341 may be a labyrinth seal, which has good sealing performance under high speed conditions, no need of lubrication, no friction, simple maintenance, long service life, and no need of using other sealing materials.
The second sealing element 342 may be a brush sealing element, which is mainly suitable for the working condition of dynamic sealing, because the contact surface between the brush sealing element and the rotating component is composed of a plurality of metal brush wires, and the brush wires and the rotating component have a certain inclination angle, so that the brush sealing element has a good sealing effect.
Finally, it should be noted that: the above embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art will understand that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present application.
Claims (11)
1. An axial force balancing device is characterized by comprising a balancing box and a supporting assembly;
the balance box is internally provided with a closed accommodating cavity, the balance box is used for being connected with a shell of a motor, an output shaft of the motor is inserted into the accommodating cavity, the support component is used for being sleeved on the output shaft, and the output shaft is connected with the support component so as to drive the support component to rotate;
the supporting assembly is abutted to the inner side wall of the accommodating cavity, the supporting assembly and the output shaft jointly divide the accommodating cavity into a first cavity and a second cavity, the balance box is further provided with an air inlet, the air inlet is communicated with the first cavity, the end part of the output shaft faces the first cavity, the air inlet is used for inputting air so as to balance the axial force applied to the output shaft, and the second cavity is communicated with the outside.
2. The axial force balancing device of claim 1, wherein the support assembly includes an abutment member and a support member, the support member being received within the abutment member;
the output shaft comprises a connecting part and a limiting part which are coaxially connected, the supporting part and the abutting part are sleeved on the connecting part, part of the connecting part is located in the first cavity, and the supporting part faces to the end face of the limiting part and abuts against the limiting part.
3. The axial force balancing device of claim 2, further comprising a coupling assembly, the coupling assembly including a first coupling member and a plurality of second coupling members, the first coupling member being sleeved over the connecting portion located in the first chamber, the second coupling member connecting the first coupling member and the connecting portion.
4. The axial force balancing device of claim 3, wherein the first connector is a gland and the second connector is a screw or bolt.
5. The axial force balancing device of claim 2, wherein the balancing box includes a box body and a box cover, the accommodating cavity is located in the box body, the box cover is disposed on the box body to close the accommodating cavity, the box cover is connected to the box body, the air inlet is located on the box cover, a mounting hole is formed in the bottom of the box body, and the output shaft is partially inserted into the mounting hole and abuts against an inner side wall of the mounting hole.
6. The axial force balancing device of claim 5, further comprising a seal assembly for reducing fluid egress from a gap between an outer sidewall of the abutment and an inner sidewall of the receiving cavity.
7. The axial force balancing device of claim 6, wherein the seal assembly comprises a first seal, wherein the outer sidewall of the abutment member has a first abutment and a second abutment, the first abutment and the second abutment are adjacent, the first seal is located between the first abutment and the inner sidewall of the receiving cavity, and a seal is located between an end of the first seal facing the cover and the inner sidewall of the cover.
8. The axial force balancing device of claim 7, wherein the seal assembly further comprises a second plurality of seals between the second abutment and the inner sidewall of the receiving cavity.
9. The axial force balancing device of claim 8, wherein the second abutment has a wear layer thereon.
10. The axial force balancing device of claim 9, further comprising a plurality of soft spacers spaced apart from the second seal.
11. An axial force balancing device according to any one of claims 8 to 10, wherein the first seal is a labyrinth seal and the second seal is a brush seal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220737857.1U CN217059138U (en) | 2022-03-31 | 2022-03-31 | Axial force balancing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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