Axial force balancing device

Abstract

The application provides an axial force balancing device, which comprises a balancing box and a supporting assembly; the balancing box is provided with a closed containing cavity, is used for being connected with a shell of a motor, and an output shaft of the motor is inserted into the containing cavity; the supporting assembly is used for being sleeved on the output shaft, the output shaft is connected with the supporting assembly to drive the supporting assembly to rotate; the supporting assembly abuts against an inner side wall of the containing cavity, and the supporting assembly and the output shaft jointly divide the containing cavity into a first cavity and a second cavity; the box body is further provided with an air inlet, the air inlet is communicated with the first cavity, an end of the output shaft faces the first cavity, the air inlet is used for inputting gas to balance the axial force applied on the output shaft, and the second cavity is communicated with the outside. The axial force balancing device can balance the axial force on the output shaft of the motor, and effectively improves the stability and reliability of the motor.

Description

Technical Field

[0001] This invention relates to the field of component testing technology for rotating equipment, and in particular to an axial force balancing device. Background Technology

[0002] With the development of technology, it is possible to manufacture some basic research equipment to simulate actual working conditions, so as to conduct performance research and testing on some key components in rotating equipment.

[0003] To test the performance of key components of rotating equipment, the experimental device is directly driven by the output shaft of a motor, causing the tested components to rotate and simulating high-speed operating conditions. Since the relative speed and load of the friction pairs of the key components in the rotating equipment are significantly increased, the basic research equipment used to simulate actual operating conditions, such as high-speed, high-load friction and wear test benches and high-speed, high-load sealing test benches, typically generate large axial forces. These axial forces ultimately act on the output shaft of the motor through the test device, causing the motor to bear a significant axial force.

[0004] However, in existing technologies, the lifespan of motor bearings is shortened under axial force, which increases the risk of motor failure and reduces the stability and reliability of the motor. Summary of the Invention

[0005] This invention provides an axial force balancing device that can balance the axial force on the motor output shaft, effectively improving the stability and reliability of the motor.

[0006] This invention provides an axial force balancing device, comprising: a balancing box and a support assembly;

[0007] The balance box has a closed receiving cavity. The balance box is used to connect with the motor housing, and the motor output shaft is inserted into the receiving cavity. The support assembly is used to be sleeved on the output shaft. The output shaft is connected to the support assembly to drive the support assembly to rotate.

[0008] The support assembly abuts against the inner wall of the receiving cavity. The support assembly and the output shaft together divide the receiving cavity into a first chamber and a second chamber. The balance box also has an air inlet that communicates with the first chamber. The end of the output shaft faces the first chamber. The air inlet is used to input gas to balance the axial force applied to the output shaft. The second chamber communicates with the outside.

[0009] In one possible implementation, the axial force balancing device provided by the present invention includes a support component comprising an abutment and a support component, wherein the support component is sleeved within the abutment.

[0010] The outer side wall of the abutting member abuts against the inner side wall of the receiving cavity. The output shaft includes a connecting part and a limiting part that are coaxially connected. The support member and the abutting member are sleeved on the connecting part, and part of the connecting part is located in the first chamber. Part of the end face of the support member facing the limiting part abuts against the limiting part.

[0011] In one possible implementation, the axial force balancing device provided by the present invention further includes a connecting assembly, which includes a first connecting member and a plurality of second connecting members. The first connecting member is sleeved on the connecting portion located in the first chamber, and the second connecting members connect the first connecting member and the connecting portion.

[0012] In one possible implementation, the axial force balancing device provided by the present invention has a first connecting member as a pressure cap and a second connecting member as a screw or bolt.

[0013] In one possible implementation, the axial force balancing device provided by the present invention includes a balancing box comprising a box body and a box cover. A receiving cavity is located inside the box body, and the box cover is placed on the box body to close the receiving cavity. The box cover is connected to the box body, and an air inlet is located on the box cover. The bottom of the box body has a mounting hole, and the output shaft portion is inserted into the mounting hole and abuts against the inner sidewall of the mounting hole.

[0014] In one possible implementation, the axial force balancing device provided by the present invention further includes a sealing assembly for reducing fluid leakage through the gap between the outer wall of the abutment and the inner wall of the receiving cavity.

[0015] In one possible implementation, the axial force balancing device provided by the present invention includes a sealing assembly comprising a first seal, an outer wall of an abutment having a first abutment portion and a second abutment portion adjacent to each other, the first seal being located between the first abutment portion and the inner wall of the receiving cavity, and a seal being formed between the end of the first seal facing the lid and the inner side of the lid.

[0016] In one possible implementation, the axial force balancing device provided by the present invention further includes a plurality of second seals in the sealing assembly, the second seals being located between the second abutment portion and the inner wall of the receiving cavity.

[0017] In one possible implementation, the axial force balancing device provided by the present invention has a wear-resistant layer on the second abutment portion.

[0018] In one possible implementation, the axial force balancing device provided by the present invention further includes a plurality of soft partitions, which are spaced apart from the second seal.

[0019] In one possible implementation, the axial force balancing device provided by the present invention has a labyrinth seal as the first seal and a brush seal as the second seal.

[0020] The axial force balancing device provided by this invention arranges a support assembly within the accommodating cavity of a balancing chamber. This support assembly is connected to the output shaft of a motor inserted within the accommodating cavity. When the output shaft rotates, it only drives the support assembly to rotate relative to the balancing chamber, facilitating a fixed connection between the balancing chamber and the motor's housing. The support assembly and the motor's output shaft together divide the accommodating cavity into two independent chambers: a first chamber and a second chamber. This creates a pressure difference between the two chambers. By introducing high-pressure gas into the first chamber, the high-pressure gas can exert an axial force towards the motor's housing through the support assembly onto the motor's output shaft. This axial force balances the axial force acting on the output shaft from the test chamber, achieving a force balance on the motor's output shaft. This effectively reduces the axial load on the motor's output shaft, preventing damage to the motor bearings under axial load, thus significantly improving the motor's operating efficiency and enhancing the stability and reliability of the electrodes. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the structure of the motor and the test chamber in the prior art;

[0023] Figure 2 A schematic diagram of the axial force balancing device provided by the present invention;

[0024] Figure 3 A schematic diagram illustrating the usage state of the axial force balancing device provided by the present invention;

[0025] Figure 4 A schematic diagram showing the connection between the axial force balancing device and the motor provided by the present invention;

[0026] Figure 5 This is a schematic diagram of the sealing component in the axial force balancing device provided by the present invention.

[0027] Explanation of reference numerals in the attached figures:

[0028] 10 - Motor; 20 - Test chamber; 30 - Axial force balancing device;

[0029] 110 - Output shaft; 111 - Connecting part; 112 - Limiting part;

[0030] 120 - Outer shell;

[0031] 210 - Component to be tested;

[0032] 311-First chamber; 312-Second chamber; 313-Air inlet; 314-Box body; 315-Box cover; 316-One-way valve; 317-Pressure relief port;

[0033] 321 - Abutment component; 322 - Support component;

[0034] 3211 - First abutment part; 3212 - Second abutment part;

[0035] 331 - First connector; 332 - Second connector;

[0036] 341 - First seal; 342 - Second seal; 343 - Seal; 344 - Soft separator;

[0037] F1 - Axial force applied to the output shaft by the axial force balancing device;

[0038] F2 - The axial force applied to the output shaft by the test chamber. Detailed Implementation

[0039] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0040] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, an indirect connection through an intermediate medium, or the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0041] In the description of this application, it should be understood that the terms "upper", "lower", "front", "back", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0042] The terms "first," "second," and "third" (if any) in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a particular order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented, for example, in orders other than those illustrated or described herein.

[0043] Furthermore, the terms “comprising” and “having”, and any variations thereof, are intended to cover non-exclusive inclusion, such as a process, method, system, product, or maintenance tool that includes a series of steps or units, not necessarily limited to those steps or units that are explicitly listed, but may include other steps or units that are not explicitly listed or that are inherent to such process, method, product, or maintenance tool.

[0044] With technological advancements, it's possible to manufacture basic research equipment to simulate real-world working conditions, enabling performance testing of key components in rotating equipment. For example, enclosed test chambers can be created, and the components to be tested can be placed inside to simulate real-world conditions involving high speeds and high loads. Figure 1 As shown, the test chamber 20 is used to simulate the actual working conditions of the component 210 under test. The component 210 is placed inside the test chamber 20. One end of the test chamber 20 is connected to the motor 10, and the output shaft 110 of the motor 10 directly drives the component 210 inside the test chamber 20 to rotate, thus simulating high-speed working conditions. Additionally, high-pressure gas is introduced into the other end of the test chamber 20 away from the motor 10. The high-pressure gas contacts one end face of the component 210 and applies pressure to that end face. Figure 1 (In the direction indicated by the dashed arrow), the pressure converges to form an axial force acting on the component 210 under test, thus simulating high-load conditions.

[0045] Because the relative speed and load of the friction pairs of key components in rotating equipment are greatly increased, the basic research equipment used to simulate actual working conditions for performance studies, such as high-speed high-load friction and wear test benches and high-speed high-load sealing test benches, usually generate large axial forces. These axial forces ultimately act on the output shaft 110 of the motor 10 through the component under test 210, thus subjecting the motor 10 to a large axial force. Moreover, this axial force can shorten the bearing life of the motor 10, increasing the risk of motor failure and reducing the stability and reliability of the motor 10.

[0046] Based on this, this application provides an axial force balancing device. By installing this axial force balancing device at the end of the output shaft 110 of the motor 10 away from the test chamber 20, and by generating an axial force toward the output shaft 110 of the motor 10 through this axial force balancing device, it can achieve balance with the axial force generated by the test chamber 20, so that the output shaft 110 of the motor 10 is always in a state of force balance. This improves the bearing life of the motor 10, thereby improving the stability and reliability of the motor 10.

[0047] Example

[0048] Figure 2 A schematic diagram of the axial force balancing device provided by the present invention; Figure 3 This is a schematic diagram showing the usage state of the axial force balancing device provided by the present invention. Figure 4 This is a schematic diagram showing the connection between the axial force balancing device and the motor provided by the present invention. Figures 2-4 As shown, this application provides an axial force balancing device 30, including a balancing box (not shown) and a support assembly (not shown). The balancing box has a closed receiving cavity (not shown), which is used to connect to the housing 120 of the motor 10. The output shaft 110 of the motor 10 is inserted into the receiving cavity. The support assembly is used to be sleeved on the output shaft 110. The output shaft 110 is connected to the support assembly to drive the support assembly to rotate. The support assembly abuts against the inner wall of the receiving cavity. The support assembly and the output shaft 110 together divide the receiving cavity into a first chamber 311 and a second chamber 312. The balancing box also has an air inlet 313, which communicates with the first chamber 311. The end of the output shaft 110 faces the first chamber 311. The air inlet 313 is used to input gas to balance the axial force applied to the output shaft 110. The second chamber 312 communicates with the outside.

[0049] In practice, both the balance box and the support assembly can be cylindrical structures, and the receiving cavity inside the balance chamber can also be cylindrical. The support assembly is located inside the receiving cavity, and the axes of the support assembly, the receiving cavity, and the balance box coincide. One end of the balance box can be connected to the housing 120 of the motor 10 by means of threaded connection, riveting, or welding. The axis of the output shaft 110 of the motor 10 can coincide with the axis of the receiving cavity. In this way, the output shaft 110 of the motor 10 can be inserted into the receiving cavity and connected to the support assembly inside the receiving cavity. When the motor 10 is working, it can drive the output shaft 110 to rotate, and the output shaft 110 can in turn drive the support assembly to rotate.

[0050] The outer wall of the support assembly can abut against the inner wall of the receiving cavity, so that when the support assembly is sleeved on the output shaft 110, it can jointly divide the receiving cavity into a first chamber 311 and a second chamber 312 that are independent of each other. The first chamber 311 and the second chamber 312 are located on opposite sides of the support assembly, and the second chamber 312 is close to the housing 120 of the motor 10.

[0051] The air inlet 313 can be located on the balance box, at the end of the balance box furthest from the motor 10. The air inlet 313 communicates with the first chamber 311, allowing high-pressure gas to be supplied into the first chamber 311. A one-way valve 316 can also be installed on the air inlet 313, used to open or close the air inlet 313 in one direction. An internal thread can be provided on the inner wall of the air inlet 313, and the one-way valve 316 can have an external thread. This threaded connection connects the one-way valve 316 to the air inlet 313, allowing it to communicate with a gas source (not shown in the figure). High-pressure gas can then be continuously supplied into the first chamber 311 through the one-way valve 316, and the one-way valve 316 effectively prevents backflow of high-pressure gas from inside the first chamber 311.

[0052] After being pressurized, the high-pressure gas is input into the first chamber 311 through the air inlet 313. The high-pressure gas accumulated inside the first chamber 311 can exert pressure on the support assembly, and the surface on which the pressure acts is the end face of the support assembly away from the motor 10, and the direction of the pressure is towards the motor 10. Figure 4 (The direction indicated by the dashed arrow). After being transmitted through the support components, the pressure converges on the output shaft 110 of the motor 10 to form a force as shown in the image. Figure 3 The axial force F1 shown is along the axis of the output shaft 110. This axial force F1 is collinear with the axial force F2 acting on the output shaft 110 of the motor 10 from the test chamber 20, and their directions are opposite. This allows the pressure of the high-pressure gas input into the first chamber 311 to be equal to the pressure of the high-pressure gas input into the test chamber 20. This ensures that the axial forces F1 and F2 generated at opposite ends of the output shaft 110 of the motor 10 are equal in magnitude and opposite in direction, thus achieving a state of force balance on the output shaft 110 of the motor 10.

[0053] The second chamber 312 can be connected to the external environment through the pressure relief port 317, so that the pressure inside the second chamber 312 can be kept consistent with the atmospheric pressure in the external environment, thereby ensuring that the pressure inside the first chamber 311 is greater than the pressure inside the second chamber 312, so that the high-pressure gas inside the first chamber 311 can apply pressure to the support component.

[0054] The axial force balancing device 30 provided in this application arranges a support assembly within the accommodating cavity of the balancing box. The support assembly is connected to the output shaft 110 of the motor 10 inserted within the accommodating cavity. This allows the output shaft 110 to rotate only the support assembly relative to the balancing box, facilitating a fixed connection between the balancing box and the housing 120 of the motor 10. The support assembly and the output shaft 110 of the motor 10 together divide the accommodating cavity into two independent chambers: a first chamber 311 and a second chamber 312. This creates a pressure difference between the first chamber 311 and the second chamber 312. By introducing high-pressure gas into the first chamber 311, the high-pressure gas can apply an axial force F1 towards the motor housing 120 to the output shaft 110 of the motor 10 through the support assembly. This axial force F1 balances the axial force F2 acting on the output shaft 110 by the test chamber 20, so that the output shaft 110 of the motor 10 reaches a force balance state. This can effectively reduce the axial load on the output shaft 110 of the motor 10, avoid damage to the bearings of the motor 10 under the action of axial load, effectively improve the working efficiency of the motor 10, and improve the stability and reliability of the motor 10.

[0055] Please continue reading Figure 4 As shown, the support assembly includes an abutment 321 and a support 322. The support 322 is sleeved inside the abutment 321. A portion of the outer sidewall of the abutment 321 abuts against the inner sidewall of the receiving cavity. The output shaft 110 includes a coaxially connected connecting portion 111 and a limiting portion 112. The support 322 and the abutment 321 are sleeved on the connecting portion 111, and a portion of the connecting portion 111 is located in the first chamber 311. A portion of the end face of the support 322 facing the limiting portion 112 abuts against the limiting portion 112.

[0056] Specifically, the support assembly may include an abutment 321 and a support 322, both of which may be cylindrical structures with their axes coinciding. A circular groove (not shown in the figure) may be provided on the abutment 321, with its axis coinciding with the line of the abutment 321. The support 322 can be fitted into the circular groove. The outer wall of the abutment 321 may abut against the inner wall of the receiving cavity, thus allowing the abutment 321 and the support 322 to together form the support assembly. Through the combined action of the abutment 321, the support 322, and the output shaft 110, the first chamber 311 and the second chamber 312 can be independent of each other.

[0057] In some embodiments, the support assembly can be an integrally formed component, that is, the abutment 321 and the support 322 can be integrated into one part, which can effectively reduce the assembly steps of the axial force balancing device and improve the assembly efficiency of the axial force balancing device. The support assembly can abut against the output shaft 110, so that the support assembly and the output shaft 110 can jointly divide the receiving cavity into a first chamber 311 and a second chamber 312.

[0058] The support assembly may have a first mounting hole (not shown) and a second mounting hole (not shown) that are interconnected. The inner diameter of the first mounting hole is equal to the inner diameter of the second mounting hole, and the axes of both the first and second mounting holes coincide with the axis of the output shaft 110 of the motor 10. The first mounting hole may be located on the abutment member 321, and the second mounting hole may be located on the support member 322. This allows the output shaft 110 to be fitted together through the first and second mounting holes, thereby connecting the output shaft 110 to the support assembly.

[0059] The output shaft 110 may include a connecting part 111 and a limiting part 112 that are coaxially connected. The connecting part 111 may be sleeved in the first mounting hole and the second mounting hole. The limiting part 112 may abut against the end of the support member 322 adjacent to the limiting part 112 to limit the support member 322.

[0060] The support member 322 can be a hollow structure to reduce the weight of the support member 322, which can reduce the moment of inertia generated by the support member 322 at high rotation speed.

[0061] Please continue reading Figure 4 As shown, the axial force balancing device 30 provided in this application also includes a connecting assembly (not shown in the figure). The connecting assembly includes a first connecting member 331 and a plurality of second connecting members 332. The first connecting member 331 is sleeved on the connecting portion 111 located in the first chamber 311, and the second connecting members 332 connect the first connecting member 331 and the connecting portion 111. The first connecting member 331 is a pressure cap, and the second connecting members 332 are screws or bolts.

[0062] In some embodiments, the support assembly can also be connected to the output shaft 110 by providing a connecting assembly. The connecting assembly may include a first connector 331 and a second connector 332, wherein the first connector 331 can be sleeved on the end of the connecting portion 111 of the output shaft 110 located inside the first chamber 311, and the first connector 331 simultaneously abuts against the side of the abutment 321 opposite to the support member 322, so as to limit the abutment 321. In this way, the support assembly can be limited and fixed on the connecting portion 111 by the combined action of the first connector 331 and the second connector 332.

[0063] The second connector 332 can be used to fix the first connector 331 to the end of the connecting part 111. There can be multiple second connectors 332. Specifically, the first connector 331 can be a pressure cap, and the second connector 332 can be a screw. Correspondingly, a threaded hole (not shown in the figure) corresponding to the second connector 332 is also provided at the end of the connecting part 111. In this way, the pressure cap can be fixedly connected to the end of the connecting part 111 by means of threaded connection.

[0064] In some embodiments, the second connector 332 can be a bolt, which can be a bolt with two round nuts screwed together with a screw rod to form a double round nut bolt. By screwing the bolt into the threaded hole of the connecting part 111, the gland can be fixedly connected to the end of the connecting part 111 by bolt connection. In addition, after the double round nuts are tightened, an axial force is generated between the two round nuts. This axial force can increase the friction between the threads of the double round nuts and the threads of the screw rod, thereby preventing the double round nuts from loosening and falling off automatically.

[0065] Bolts can also be formed by screwing a single round nut and a locking washer together with the screw rod to form a bolt with a round nut. After the round nut is tightened, the locking washer can effectively prevent the round nut from loosening and falling off, thus improving the reliability of the bolt connection.

[0066] Please continue reading Figure 4 As shown, the balance box includes a box body 314 and a box cover 315. The receiving cavity is located inside the box body 314. The box cover 315 is placed on the box body 314 to close the receiving cavity. The box cover 315 is connected to the box body 314. The air inlet 313 is located on the box cover 315. The bottom of the box body 314 has a mounting hole (not shown in the figure). The output shaft 110 is partially inserted into the mounting hole and abuts against the inner wall of the mounting hole.

[0067] In some embodiments, the balance box may include a box body 314 and a box cover 315. The receiving cavity is located within the box body 314. The box body 314 also has an opening (not shown) communicating with the receiving cavity. The box cover 315 can be placed over the opening to close the receiving cavity. The support assembly can be fitted into the receiving cavity through the opening.

[0068] The cover 315 can be connected to the body 314 by means of threaded connection, riveting, or snap-fit. A sealing gasket (not shown in the figure) can be installed between the cover 315 and the body 314, which can effectively improve the sealing performance of the balance box.

[0069] The mounting hole is located at the bottom of the housing 314 away from the cover 315. The mounting hole communicates with the receiving cavity, and the axis of the mounting hole coincides with the axis of the receiving cavity. This allows the output shaft 110 of the motor 10 to be inserted into the receiving cavity through the mounting hole.

[0070] Figure 5 This is a schematic diagram of the sealing assembly in the axial force balancing device provided by the present invention, as shown below. Figure 4 and Figure 5 As shown, the axial force balancing device 30 provided in this application further includes a sealing assembly (not shown in the figure). The sealing assembly is used to reduce fluid leakage from the gap between the outer wall of the abutment 321 and the inner wall of the receiving cavity. The sealing assembly includes a first seal 341. The outer wall of the abutment 321 has a first abutment portion 3211 and a second abutment portion 3212, which are adjacent to each other. The first seal 341 is located between the first abutment portion 3211 and the inner wall of the receiving cavity, and a seal 343 is provided between the end of the first seal 341 facing the cover 315 and the inner side surface of the cover 315. The sealing assembly also includes a plurality of second seals 342, which are located between the second abutment portion 3212 and the inner wall of the receiving cavity.

[0071] In this embodiment, since there is a gap between the outer wall of the abutment 321 and the inner wall of the receiving cavity, and fluid will flow out from this gap, a sealing assembly is disposed between the outer wall of the abutment 321 and the inner wall of the receiving cavity. This effectively improves the sealing performance between the outer wall of the abutment 321 and the inner wall of the receiving cavity, thereby reducing the fluid flowing out from the gap, so that the first chamber 311 and the second chamber 312 can be relatively independent. It should be noted that the fluid can be a liquid or a gas; in this embodiment, the fluid is high-pressure gas.

[0072] The sealing assembly may include a first seal 341 and a plurality of second seals 342. The first seal 341 and the second seal 342 are both disposed between the outer side wall of the abutment 321 and the inner side wall of the receiving cavity. The first seal 341 and the second seal 342 can effectively improve the sealing performance between the outer side wall of the abutment 321 and the inner side wall of the receiving cavity.

[0073] The first abutment portion 3211 and the second abutment portion 3212 are disposed on the outer wall of the abutment member 321. The outer diameter of the first abutment portion 3211 is larger than the outer diameter of the second abutment portion 3212. The first sealing member 341 is disposed between the first abutment portion 3211 and the inner wall of the receiving cavity. A plurality of second sealing members 342 are sequentially disposed between the second abutment portion 3212 and the inner wall of the receiving cavity. In this way, the sealing performance between the outer wall of the abutment member 321 and the inner wall of the receiving cavity can be further improved through the joint cooperation of the first sealing member 341 and the second sealing member 342.

[0074] The end of the first sealing element 341 facing the cover 315 abuts against the inner side of the cover 315. A sealing element 343 can be provided between the first sealing element 341 and the cover 315 to improve the sealing performance between the first sealing element 341 and the cover 315.

[0075] In this embodiment, the second contact portion 3212 has a wear-resistant layer (not shown in the figure). Specifically, the wear-resistant layer can be a cadmium oxide (Cr2O3) coating or an aluminum oxide (Al2O3) coating; this application does not specifically limit the application in this regard. The wear-resistant layer can effectively increase the wear resistance of the second contact portion 3212, thereby reducing frictional wear on the second contact portion 3212.

[0076] Please continue reading Figure 5 As shown, the axial force balancing device 30 provided in this application also includes a plurality of soft partitions 344, which are spaced apart from the second sealing member 342.

[0077] In practice, the soft separator 344 can be a rubber block. The soft separator 344 is spaced between the second seals 342, which can effectively improve the sealing performance between multiple second seals 342.

[0078] Please continue reading Figure 5 As shown, the first seal 341 is a labyrinth seal, and the second seal 342 is a brush seal.

[0079] In this embodiment, the first seal 341 can be a labyrinth seal. Labyrinth seals have good sealing performance under high-speed conditions, do not require lubrication, have no friction, are easy to maintain, have a long service life, and do not require the use of other sealing materials.

[0080] The second sealing element 342 can be a brush seal. Brush seals are mainly suitable for dynamic sealing applications. Since the contact surface between the brush seal and the rotating part is composed of multiple metal brush filaments, and these brush filaments have a certain angle of inclination with the rotating part, they have a very good sealing effect.

[0081] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. An axial force balancing device, characterized by, Includes the balance box and support components; The balance box has a closed receiving cavity. The balance box is connected to the housing of the motor. One end of the output shaft of the motor is inserted into the receiving cavity and connected to the support assembly sleeved on the output shaft to drive the support assembly to rotate. A test chamber is provided on the side of the motor away from the axial force balancing device. The test chamber contains a component to be tested for use on a rotating device. The other end of the motor's output shaft is inserted into the test chamber and connected to the component to be tested in the test chamber to drive the component to be tested to rotate. When the component to be tested is subjected to rotation testing, the gas input into the test chamber applies pressure to the end face of the component to be tested on the side away from the motor, forming an axial force acting on the component to be tested. The support assembly abuts against the inner wall of the receiving cavity. The support assembly and the output shaft together divide the receiving cavity into a first chamber and a second chamber. The balance box also has an air inlet, which communicates with the first chamber. The end of the output shaft faces the first chamber. The air inlet is used to input gas to balance the axial force applied to the output shaft. The second chamber communicates with the outside.

2. The axial force balancing device of claim 1, wherein, The support assembly includes an abutment and a support, with the support sleeved inside the abutment; A portion of the outer sidewall of the abutting member abuts against the inner sidewall of the receiving cavity. The output shaft includes a connecting portion and a limiting portion that are coaxially connected. The support member and the abutting member are sleeved on the connecting portion, and a portion of the connecting portion is located in the first cavity. A portion of the end face of the support member facing the limiting portion abuts against the limiting portion.

3. The axial force balancing device of claim 2, wherein, It also includes a connecting component, which includes a first connector and a plurality of second connectors. The first connector is sleeved on the connecting portion located in the first cavity, and the second connectors connect the first connector and the connecting portion.

4. The axial force balancing device of claim 3, wherein, The first connector is a pressure cap, and the second connector is a screw or bolt.

5. The axial force balancing device according to claim 2, characterized in that, The balance box includes a box body and a box cover. The receiving cavity is located inside the box body. The box cover is placed on the box body to close the receiving cavity. The box cover is connected to the box body. The air inlet is located on the box cover. The bottom of the box body has a mounting hole. The output shaft is inserted into the mounting hole and abuts against the inner side wall of the mounting hole.

6. The axial force balancing device according to claim 5, characterized in that, It also includes a sealing assembly for reducing fluid leakage through the gap between the outer wall of the abutment and the inner wall of the receiving cavity.

7. The axial force balancing device according to claim 6, characterized in that, The sealing assembly includes a first seal, the outer side wall of the abutment has a first abutment portion and a second abutment portion, the first abutment portion and the second abutment portion are adjacent to each other, the first seal is located between the first abutment portion and the inner side wall of the receiving cavity, and the end of the first seal facing the lid has a seal between it and the inner side of the lid.

8. The axial force balancing device according to claim 7, characterized in that, The sealing assembly further includes a plurality of second seals located between the second abutment and the inner wall of the receiving cavity.

9. The axial force balancing device according to claim 8, characterized in that, The second contact portion has a wear-resistant layer.

10. The axial force balancing device according to claim 9, characterized in that, It also includes multiple soft spacers, which are spaced apart from the second seal.

11. The axial force balancing device according to any one of claims 8-10, characterized in that, The first seal is a labyrinth seal, and the second seal is a brush seal.

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