An axial force loading device and an axial force adjustable rotating device

Abstract

This invention discloses an axial force loading device and an axial force adjustable rotating device, relating to the field of axial force application testing technology. It includes a stator and a mover. The stator's air inlet is connected to an air source, and the mover is coaxially connected to a rotating shaft. The mover is coaxially disposed within the stator's exhaust channel, with the outer wall of the mover spaced apart from the inner wall of the exhaust channel. The gas pressure provided by the air source can directly act on the mover, enabling it to generate axial movement and provide axial force to the rotating shaft. Furthermore, the spaced-apart arrangement between the outer wall of the mover and the inner wall of the exhaust channel prevents the mover from experiencing radial force from the stator during axial movement, thus avoiding the problem of radial force affecting the normal operation of the rotating shaft.

Description

Technical Field

[0001] This invention relates to the field of axial force application testing technology, and in particular to an axial force loading device and an axial force adjustable rotating device. Background Technology

[0002] Axial force is a significant factor contributing to malfunctions in rotating machinery. Excessive axial force can cause axial overload of bearings, increased bearing cavity temperature, and excessive contact stress, thus affecting bearing life. Conversely, insufficient axial force or force reversal can increase the risk of bearing slippage under light loads, rubbing damage, or impact damage. Therefore, axial force is a crucial parameter in rotating machinery design. During the development phase of rotating machinery, it is necessary to optimize the axial force design to ensure it remains within a reasonable range, thereby guaranteeing the safe and reliable operation of the bearings within their specified lifespan.

[0003] In traditional mechanical systems, axial force application devices typically use piston devices (such as hydraulic cylinders, pneumatic cylinders, or electric push rods) to provide thrust to the rotating shaft. These devices apply axial force to the rotating shaft through the linear motion of the piston rod to achieve axial positioning, pressure loading, or motion control.

[0004] However, existing piston-type axial force application devices generate additional radial force during operation due to load eccentricity, installation errors, inconsistent piston circumferential friction, or non-collinear movement. This radial force is transmitted to the rotating shaft, causing the bearing to be subjected to additional loads in directions other than those designed for it, affecting rotational accuracy, and even accelerating bearing wear or causing vibration. Summary of the Invention

[0005] The purpose of this invention is to provide an axial force loading device and an axial force adjustable rotating device, which provides axial force to the rotating shaft through a stationary and a moving part that do not come into contact with each other, thereby eliminating the influence of radial force on the rotating shaft.

[0006] To achieve the above objectives, the present invention provides the following solution:

[0007] This invention provides an axial force loading device, comprising:

[0008] The inlet of the stator is used to connect to an air source;

[0009] And a mover, which is used to be coaxially connected to the rotating shaft, and the mover is coaxially disposed in the exhaust channel of the stationary element, with the outer wall of the mover and the inner wall of the exhaust channel spaced apart.

[0010] As one embodiment, the system also includes a labyrinth sealing assembly, which includes a first grate and a second grate that cooperate with each other. The first grate is mounted on the inner wall of the stationary element, and the second grate is mounted on the outer wall of the moving element. The first grate and the second grate are in clearance fit.

[0011] As one embodiment, the stator includes a first part and a second part symmetrically arranged along the axial section of the exhaust channel, wherein the first part and the second part are detachably connected.

[0012] In one embodiment, the mover is hollow inside, and the end of the mover away from the rotation axis is the air intake end, which is connected to the exhaust channel.

[0013] As one embodiment, it also includes a pressure sensor, the sensing end of which is connected to the air pressure of the exhaust channel.

[0014] As one embodiment, a flow control valve is provided between the air inlet and the air source.

[0015] As one embodiment, it also includes a connector, the inlet end of which is threadedly connected to the outlet end of the gas source, and the outlet end of which is threadedly connected to the air inlet.

[0016] The present invention also discloses a rotating device with adjustable axial force, comprising:

[0017] The aforementioned axial force loading device;

[0018] A rotating shaft is connected to the end of the mover that is furthest from the air source;

[0019] And a support frame, which is disposed at one axial end of the rotating shaft, and the stator is fixedly installed on the support frame.

[0020] As one embodiment, the end of the mover away from the air source is provided with a threaded hole, and the rotating shaft is threadedly connected to the mover.

[0021] As one embodiment, the support frame is provided with mounting holes for accommodating the stator, and the stator is bolted to the support frame.

[0022] The present invention achieves the following technical effects compared to the prior art:

[0023] In the axial force loading device disclosed in this invention, the air inlet of the stator is used to connect to the air source, and the moving part, which is connected to the rotating shaft, is coaxially arranged in the exhaust channel of the stator. The gas pressure provided by the air source can directly act on the moving part, enabling the moving part to generate axial movement and provide axial force to the rotating shaft. Furthermore, the outer wall of the moving part and the inner wall of the exhaust channel are spaced apart. Therefore, the moving part will not be subjected to radial force from the stator during axial movement, thus avoiding the problem of radial force affecting the normal operation of the rotating shaft. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of the axial force loading device in an embodiment of the present invention;

[0026] Figure 2 This is a schematic diagram of an axially adjustable rotation device in an embodiment of the present invention;

[0027] The components are: 1. Stator; 2. Air source; 3. Moving element; 4. Exhaust channel; 5. First grate tooth; 6. Second grate tooth; 7. Pressure sensor; 8. Connector; 9. Rotating shaft; 10. Support frame. Detailed Implementation

[0028] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0029] The purpose of this invention is to provide an axial force loading device and an axial force adjustable rotating device to solve the problems existing in the prior art. By using gas as a power source and ensuring that the moving part and the stationary part do not come into contact with each other, the axial force is provided only to the rotating shaft.

[0030] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0031] Please refer to Figure 1-2The axial force loading device disclosed in this embodiment of the invention includes: a stator 1 and a mover 3; wherein the air inlet of the stator 1 is used to connect to the air source 2, and the mover 3 is used to connect to the rotating shaft 9, and the mover 3 and the rotating shaft 9 are coaxially arranged. The mover 3 is disposed in the exhaust channel 4 of the stator 1, and the mover 3 and the exhaust channel 4 of the stator 1 are coaxially arranged, and the outer wall of the mover 3 is spaced apart from the inner wall of the exhaust channel 4. Its working principle is as follows: the air source 2 provides high-pressure gas to the stator 1, and the high-pressure gas enters the exhaust channel 4 of the stator 1 through the air inlet. The mover 3 is connected to the rotating shaft 9, and the outer wall of the mover 3 is spaced apart from the inner wall of the stator 1. Under the push of the gas pressure, the mover 3 can generate a tendency to move along the axial direction of the exhaust channel 4, thereby providing axial pressure to the rotating shaft 9. During this process, the mover 3 will not come into contact with the stator 1, avoiding the radial force on the mover 3 due to contact with the stator 1, thus ensuring the normal operation of the rotating shaft 9.

[0032] It is understandable that although the spaced arrangement of the mover 3 and the stator 1 may cause some gas leakage, as long as the amount of gas provided by the gas source 2 per unit time is greater than the leakage amount of the gap between the mover 3 and the stator 1, it can be ensured that the gas source 2 can provide axial thrust to the mover 3.

[0033] In this embodiment, the axial force loading device further includes a labyrinth sealing assembly, which includes a first grate 5 and a second grate 6 that cooperate with each other. The first grate 5 is installed on the inner wall of the stator 1, and the second grate 6 is installed on the outer wall of the mover 3. The first grate 5 and the second grate 6 are in clearance fit. It can be understood that the first grate 5 extends towards the axis of the mover 3, and the second grate 6 extends towards the inner wall of the stator 1. The first grate 5 and the second grate 6 are staggered along the axis of the mover 3 and overlap along the radial direction of the mover 3, thereby forming a labyrinth seal, which effectively reduces the leakage of gas in the gap between the mover 3 and the stator 1.

[0034] In this embodiment, the stator 1 includes a first part and a second part symmetrically arranged along the axial section of the exhaust channel 4. The first part and the second part are detachably connected. The detachably connected first part and the second part form a split structure, which ensures that the stator 1 and the mover 3 are detachably arranged.

[0035] Furthermore, the first part and the second part are detachably connected by a bolt structure. It can be understood that: corresponding threaded holes can be opened on the first part and the second part without affecting the sealing performance of the stator 1, so that the first part and the second part can be connected together by a bolt structure; or connecting lugs can be provided on the outer walls of the first part and the second part, with threaded holes opened on the connecting lugs, so that the two parts can be connected together by a bolt structure.

[0036] In this embodiment, a sealing strip is provided between the first part and the second part to ensure the sealing effect of the stator 1. Of course, other existing sealing methods can also be used to seal the gap between the first part and the second part, which will not be elaborated here.

[0037] In this embodiment, the mover 3 is hollow inside, and the end of the mover 3 away from the rotating shaft 9 is the air inlet end, which is connected to the exhaust channel 4. That is, the mover 3 is a cylindrical structure with one end sealed and the other end open. The open end serves as the air inlet end of the mover 3. The mover 3 extends into the exhaust channel 4 of the stator 1, and the mover 3 is connected to the exhaust channel 4 through the air inlet end. This arrangement extends the axial overlap length of the mover 3 and the stator 1, so that more first grating teeth 5 / second grating teeth 6 can be arranged on the outer wall of the mover 3 / inner wall of the stator 1 along the axial direction, which further improves the sealing effect of the device. Moreover, this hollow arrangement of the mover 3 reduces the total weight of the mover 3 and reduces the influence of the mover 3's own weight on the radial force. Furthermore, this hollow design allows high-pressure gas to enter the interior of the mover 3 and preferentially move radially along the mover 3. It is then "caught" by the mover 3 and moves in the opposite direction, eventually reaching the gap between the mover 3 and the stationary 1. Compared to directly setting the mover 3 as a solid piston (where the gas impacts the piston end and moves radially directly to the gap between the mover 3 and the stationary 1, and flows out from the gap), this design extends the gas's movement path, increases the resistance during gas flow, makes it less likely for gas to leak from the system, reduces gas loss, and lowers costs.

[0038] In this embodiment, the axial force loading device also includes a pressure sensor 7. The sensing end of the pressure sensor 7 is connected to the air pressure of the exhaust channel 4, and the pressure in the exhaust channel 4 can be monitored in real time through the pressure sensor 7.

[0039] Furthermore, a mounting hole is provided on the side wall of the stator 1, and the sensing head of the pressure sensor 7 extends into the exhaust channel 4 of the stator 1 through the mounting hole, and the pressure sensor 7 is sealed to the mounting hole.

[0040] In this embodiment, a flow control valve is provided between the air inlet and the air source 2, and the air intake volume can be adjusted in real time through the flow control valve.

[0041] In this embodiment, the axial force loading device also includes a control module, which is connected to the pressure sensor 7. The control module has a built-in formula: F=P·S, where F is the axial force, P is the pressure, and S is the cross-sectional area of ​​the rotor, thus enabling the direct determination of the axial force provided by the device.

[0042] Furthermore, the flow control valve and the drive structure of air source 2 are also connected to the control module. When the control module detects a difference between the axial force provided by the system and the preset value, it can automatically adjust the axial force in real time by controlling the opening of the flow control valve and the power of the drive structure of air source 2. Of course, operators can also manually intervene in the axial force adjustment process according to actual needs.

[0043] In this embodiment, the axial force loading device also includes a connector 8. The inlet end of the connector 8 is threadedly connected to the outlet end of the air source 2, and the outlet end of the connector 8 is threadedly connected to the air inlet. The connector 8 enables the air source 2 and the air inlet of the stator 1 to be detachably connected without changing the outlet size of the air source 2 or the air inlet size of the stator 1.

[0044] This invention also discloses an axial force adjustable rotation device, comprising: the aforementioned axial force loading device, a rotating shaft 9, and a support frame 10. The rotating shaft 9 is connected to the end of the mover 3 away from the air source 2. The support frame 10 is disposed at one axial end of the rotating shaft 9. The stator 1 is fixedly installed on the support frame 10. The axial force loading device can apply axial force to the rotating shaft 9 to ensure the stable operation of the rotation device.

[0045] In this embodiment, the end of the mover 3 away from the air source 2 is provided with a threaded hole, and the outer side wall of the rotating shaft 9 near the mover 3 is provided with an external thread. The rotating shaft 9 is threadedly connected to the mover 3. The threaded connection has the advantages of stable connection and detachability, making it easier to assemble and disassemble the rotating shaft 9 and the axial force loading device.

[0046] In this embodiment, the support frame 10 is provided with mounting holes for accommodating the stator 1. The mounting holes are coaxially arranged with the rotating shaft 9. The stator 1 is bolted to the support frame 10, and the stability of the stator 1 during operation is ensured by the support frame 10. It can be understood that the support frame 10 can be directly fixed to the ground, or it can be mounted on one end of the rotating shaft 9 via a frame.

[0047] In this embodiment, two axial force loading devices are provided. The two axial force loading devices are respectively located at both ends of the rotating shaft 9 and connected to the rotating shaft 9 through the mover 3. By clamping from both sides, the stability of the rotating shaft 9 during operation is further improved.

[0048] Specific examples have been used to illustrate the principles and implementation methods of this invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of this invention. Furthermore, those skilled in the art will recognize that, based on the ideas of this invention, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of this invention.

Claims

1. An axial force loading device, characterized in that, include: The inlet of the stator (1) is used to connect to the air source (2); And a mover (3), the mover (3) is used to be coaxially connected with the rotating shaft (9), the mover (3) is coaxially arranged in the exhaust channel (4) of the stationary (1), and the outer wall of the mover (3) is spaced apart from the inner wall of the exhaust channel (4); The moving part (3) is hollow inside. The end of the moving part (3) away from the rotating shaft (9) is the air inlet end. The air inlet end is connected to the exhaust channel (4). The moving part (3) is a cylindrical structure with one end sealed and the other end open. The open end serves as the air inlet end of the moving part (3). The moving part (3) extends into the exhaust channel (4) of the stationary part (1). The moving part (3) is connected to the exhaust channel (4) through the air inlet end. The sealed end of the mover (3) is used to connect to the rotating shaft (9).

2. The axial force loading device according to claim 1, characterized in that, It also includes a labyrinth sealing assembly, which includes a first grate tooth (5) and a second grate tooth (6) that cooperate with each other. The first grate tooth (5) is installed on the inner wall of the stationary element (1), and the second grate tooth (6) is installed on the outer wall of the moving element (3). The first grate tooth (5) and the second grate tooth (6) are in clearance fit.

3. The axial force loading device according to claim 2, characterized in that, The stator (1) includes a first part and a second part symmetrically arranged along the axial section of the exhaust channel (4), and the first part and the second part are detachably connected.

4. The axial force loading device according to claim 2, characterized in that, The mover (3) is hollow inside. The end of the mover (3) away from the rotating shaft (9) is the air intake end, which is connected to the exhaust channel (4).

5. The axial force loading device according to claim 1, characterized in that, It also includes a pressure sensor (7), the sensing end of which is connected to the air pressure of the exhaust channel (4).

6. The axial force loading device according to claim 5, characterized in that, A flow control valve is provided between the air inlet and the air source (2).

7. The axial force loading device according to claim 1, characterized in that, It also includes a connector (8), the inlet end of which is threadedly connected to the outlet end of the gas source (2), and the outlet end of which is threadedly connected to the air inlet.

8. A rotating device with adjustable axial force, characterized in that, include: The axial force loading device according to any one of claims 1-7; A rotating shaft (9) is connected to the end of the mover (3) away from the air source (2); And a support frame (10), which is located at one axial end of the rotating shaft (9), and the stator (1) is fixedly installed on the support frame (10).

9. The axially force-adjustable rotating device according to claim 8, characterized in that, The end of the mover (3) away from the air source (2) is provided with a threaded hole, and the rotating shaft (9) is threadedly connected to the mover (3).

10. The axially force-adjustable rotating device according to claim 8, characterized in that, The support frame (10) is provided with mounting holes for accommodating the stator (1), and the stator (1) is bolted to the support frame (10).

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