Test device for simulating the friction degradation behavior of ball screw pairs

Abstract

The present invention relates to a test device for simulating the friction degradation behavior of a ball screw pair. The test device for simulating the friction degradation behavior of a ball screw pair includes a bench, including a base and a lower platform plate; a reactor, including a reactor body and a reactor cover; a lifting mechanism, including an upper platform plate and a lifting device, the lifting device is arranged on the lower platform plate, the reactor cover is arranged on the bottom surface of the upper platform plate, and the lifting device is used to lift the upper platform plate; a torque loading device includes a motor, a transmission shaft and an upper clamp, the motor is used to drive the transmission shaft to drive the upper clamp to rotate; a force loading device includes a force loader, a force loading shaft and a lower clamp, the force loader is used to push the force loading shaft upward, and the lower clamp is arranged on the top of the force loading shaft; in the reactor, the upper clamp and the lower clamp are used to clamp the ball screw pair up and down. The present invention can meet the test requirements for the ball screw pair.

Description

Technical Field

[0001] The invention relates to the technical field of nuclear reactor manufacturing, and in particular to a test device for simulating friction degradation behavior of a ball screw pair. Background Art

[0002] As a key equipment of the nuclear island, the Control Rod Drive Mechanism (CRDM) undertakes an important transmission function. The transmission components of CRDM are most susceptible to damage and wear during long-term operation, which is also a key factor in determining the life limit of CRDM. The amount of wear of CRDM transmission components directly determines its service life, and the wear resistance depends on the wear resistance of the transmission component materials. Therefore, the ultimate life and performance of CRDM need to be implemented through the selection and optimization of transmission component materials. However, in the material selection and optimization stage, it is impossible to determine whether the wear resistance of the candidate materials meets the service requirements, and it is difficult to determine their actual service time. Therefore, qualitatively and quantitatively evaluating the wear resistance of candidate materials and estimating their service life have become key issues that need to be urgently addressed in material selection and optimization.

[0003] The existing method for evaluating the applicability of transmission components is the whole machine test, but this method has problems such as long preparation time for a full set of components, large number of components involved and difficult to decouple, high investment, high cost and high risk, and difficulty in achieving rapid material iteration. Therefore, it is urgent to build a reliable experimental platform to study material reliability. In order to improve the design capability of small modular reactors, based on the need to qualitatively and quantitatively evaluate the wear resistance of CRDM transmission component materials, it is necessary to design a wear tester that can simulate the stress conditions of CRDM transmission components (such as screws, nuts and bearings). Summary of the invention

[0004] In view of the above problems in the prior art, the present invention proposes a test device for simulating the friction degradation behavior of a ball screw pair, which can meet the test requirements for the ball screw pair.

[0005] Specifically, the present invention proposes a test device for simulating the friction degradation behavior of a ball screw pair, comprising:

[0006] A stand, comprising a base and a lower platform plate, wherein the lower platform plate is arranged on the base;

[0007] A reaction kettle, comprising a kettle body and a kettle cover, wherein the kettle body is arranged on the lower platform plate, and the kettle cover is used to cover the top of the kettle body to form a sealing structure inside the kettle body;

[0008] A lifting mechanism, comprising an upper platform plate and a lifting device, wherein the lifting device is arranged on the lower platform plate, the kettle cover is arranged on the bottom surface of the upper platform plate, and the lifting device is used to lift the upper platform plate;

[0009] A torque loading device is arranged on the upper platform plate, and the torque loading device comprises a motor, a transmission shaft and an upper clamp, wherein the motor is used to drive the transmission shaft to rotate, the transmission shaft passes downward through the upper platform plate and the kettle cover, and the upper clamp is arranged at the bottom of the transmission shaft;

[0010] A force loading device, comprising a force loader, a force loading shaft and a lower fixture, wherein the force loader is arranged on the base and is used to push the force loading shaft upward, and the force loading shaft passes upward through the lower platform plate and the bottom of the kettle body;

[0011] In the reactor, the upper clamp and the lower clamp are used to clamp the ball screw pair up and down.

[0012] According to one embodiment of the present invention, the lifting device includes an outer tube, an inner tube, a guide shaft and a guide shaft support, the outer tube is vertically arranged on the lower platform plate, the inner tube is fixed to the bottom of the upper platform plate, and the outer tube and the inner tube are plug-in and slidingly matched; the guide shaft support is fixed to the lower platform plate, the guide shaft is vertically arranged, the bottom of the guide shaft is connected to the guide shaft support, and the top of the guide shaft passes upward through the upper platform plate.

[0013] According to an embodiment of the present invention, the lifting mechanism further includes a connecting flange, and the upper platform plate is connected to the kettle cover via the connecting flange.

[0014] According to one embodiment of the present invention, the reaction kettle further comprises a sealing ring and a kettle body base, wherein the sealing ring is arranged between the kettle body and the kettle cover, the kettle body base is arranged on the lower platform plate, and the kettle body bottom is fixed on the kettle body base.

[0015] According to one embodiment of the present invention, the torque loading device further includes a motor base and a coupling, the motor base is fixedly disposed on the upper platform plate, the motor is disposed on the motor base, and the motor applies torque to the transmission shaft through the coupling.

[0016] According to one embodiment of the present invention, the torque loading device further comprises an anti-twist frame, which is fixedly arranged at the bottom of the upper platform plate, and the transmission shaft passes downward through the anti-twist frame and the lower platform plate and extends into the kettle body.

[0017] According to one embodiment of the present invention, the torque loading device also includes an angular contact ball bearing and a deep groove ball bearing, the angular contact ball bearing is fixed on the upper platform plate, the deep groove ball bearing is fixed on the anti-torsion frame, and the transmission shaft passes downward through the angular contact ball bearing and the deep groove ball bearing.

[0018] According to one embodiment of the present invention, the torque loading device further comprises a first skeleton oil seal and a second skeleton oil seal, wherein the first skeleton oil seal is disposed on the first bearing end cover of the angular contact ball bearing, and the second skeleton oil seal is disposed on the bottom surface of the kettle cover.

[0019] According to one embodiment of the present invention, the force loading device also includes a force sensor and a water cooling jacket, the force loader is connected to the force loading shaft through the force sensor, the water cooling jacket is arranged on the bottom surface of the kettle body base, and the force loading shaft passes through the water cooling jacket and extends into the kettle body.

[0020] According to one embodiment of the present invention, the reactor further comprises a guide sleeve disposed at the bottom of the reactor body, and the force loading axially passes through the guide sleeve.

[0021] According to one embodiment of the present invention, the torque loading device also includes an anti-twist end cover and an anti-rotation shaft, the anti-twist end cover is fixed on the guide sleeve, the anti-rotation shaft is inserted into the lower clamp, and the anti-twist end cover and the anti-rotation shaft cooperate to limit the rotation of the lower clamp.

[0022] According to one embodiment of the present invention, the torque loading device further comprises a positioning steel ball disposed between the lower clamp and the force loading shaft.

[0023] The present invention provides a test device for simulating the friction degradation behavior of a ball screw pair. The torque and thrust are applied to the upper clamp and the lower clamp respectively through a torque loading device and a force loading device. The upper clamp and the lower clamp are inserted into the reactor and clamp the ball screw pair to achieve the test requirements of the ball screw pair. The test is used to solve the problem of predicting the life of the screw nut pair and the balls therein, and provide data reference for the selection and optimization of the screw nut pair and the ball materials.

[0024] It is to be understood that both the foregoing general description and the following detailed description of the present invention are exemplary and explanatory and are intended to provide further explanation of the invention as claimed. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The accompanying drawings are included to provide further explanation of the present invention, and they are incorporated into and constitute a part of this application. The accompanying drawings illustrate embodiments of the present invention and together with this specification serve to explain the principles of the present invention. In the accompanying drawings:

[0026] Figure 1 A schematic structural diagram of a test device for simulating friction degradation behavior of a ball screw pair according to an embodiment of the present application is shown.

[0027] Figure 2 yes Figure 1 Schematic diagram of the structure of the reactor and lifting device.

[0028] Figure 3 A schematic structural diagram of a torque loading device according to an embodiment of the present application is shown.

[0029] Figure 4 yes Figure 3 AA section view.

[0030] Figure 5 A schematic structural diagram of a reactor and a force loading device according to an embodiment of the present application is shown.

[0031] Figure 6 A diagram showing the use status of an upper clamp and a lower clamp according to an embodiment of the present application is shown.

[0032] Figure 7 yes Figure 6 BB section view.

[0033] The above drawings include the following reference numerals:

[0034] Stand 110

[0035] Base 111

[0036] Lower platform plate 112

[0037] Reactor 120

[0038] Kettle 121

[0039] Cauldron cover 122

[0040] Seal 123

[0041] Kettle body base 124

[0042] Guide sleeve 125

[0043] Lifting mechanism 130

[0044] Upper platform plate 131

[0045] Lifting equipment 132

[0046] Outer tube 1321

[0047] Inner tube 1322

[0048] Guide shaft 1323

[0049] Guide shaft support 1324

[0050] Linear bearing 1325

[0051] Connecting flange 1326

[0052] Torque loading device 140

[0053] Upper fixture 141

[0054] Motor 142

[0055] Drive shaft 143

[0056] Motor base 144

[0057] Coupling 145

[0058] Anti-torsion frame 146

[0059] Angular contact ball bearing 147

[0060] First bearing end cover 1471

[0061] Bearing sleeve 1472

[0062] Round nut 1473

[0063] Adjusting shim 1474

[0064] Deep groove ball bearing 148

[0065] Second bearing end cover 1481

[0066] The first skeleton oil seal 1491

[0067] Second skeleton oil seal 1492

[0068] Force loading device 150

[0069] Lower fixture 151

[0070] Force Loader 152

[0071] Force loading shaft 153

[0072] Force sensor 154

[0073] Water cooling jacket 155

[0074] Upper connector 1561

[0075] Lower connecting piece 1562

[0076] Gasket 157

[0077] Anti-twist end cap 1581

[0078] Anti-rotation shaft 1582

[0079] Positioning steel ball 159

[0080] Ball screw pair 200 DETAILED DESCRIPTION

[0081] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application may be combined with each other.

[0082] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present application and its application or use. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0083] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0084] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps set forth in these embodiments do not limit the scope of the application. Meanwhile, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to actual proportional relationships. The technology, methods and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be considered as a part of the specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, and therefore, once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0085] In the description of the present application, it should be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction, and therefore cannot be understood as limiting the scope of protection of the present application; the directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0086] In addition, it should be noted that the use of words such as "first" and "second" to define components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above words have no special meaning and cannot be understood as limiting the scope of protection of this application. In addition, although the terms used in this application are selected from well-known and commonly used terms, some terms mentioned in the specification of this application may be selected by the applicant at his or her discretion, and their detailed meanings are explained in the relevant parts of the description of this article. In addition, it is required to understand this application not only by the actual terms used, but also by the meaning implied by each term.

[0087] Figure 1 FIG. 1 is a schematic diagram showing the structure of a test device for simulating the friction degradation behavior of a ball screw pair according to an embodiment of the present application. Figure 1 As shown, a test device for simulating the friction degradation behavior of a ball screw pair 200 mainly includes a stand 110, a reactor 120, a lifting mechanism 130, a torque loading device 140 and a force loading device 150. The stand 110 includes a base 111 and a lower platform plate 112. The lower platform plate 112 is arranged on the base 111.

[0088] The reactor 120 includes a reactor body 121 and a reactor cover 122. The reactor cover 122 is closed on the top of the reactor body 121 to form a sealing structure so as to accommodate the ball screw pair to be tested. A pipeline interface is reserved on the reactor cover 122 for injecting a specific chemical medium into the reactor 120, or injecting circulating hot water or cold water to adjust the temperature in the reactor 120 to simulate the working state under the test environment.

[0089] Continue to refer Figure 1 The lifting mechanism 130 includes an upper platform plate 131 and a lifting device 132. One end of the lifting device 132 is arranged on the upper platform plate 131, and the other end is arranged on the lower platform plate 112. The kettle cover 122 is fixedly arranged on the bottom surface of the upper platform plate 131. The lifting device 132 can drive the upper platform plate 131, thereby driving the kettle cover 122 to rise and fall. When the kettle cover 122 does not cover the kettle body 121, it is convenient for the staff to install and remove the ball screw pair in the kettle body 121. The lifting mechanism 130 can accurately control the kettle cover 122 to descend and cover the top of the kettle body 121, and the kettle body 121 and the kettle cover 122 are connected and sealed by bolts.

[0090] Figure 3 The structure diagram of the torque loading device according to one embodiment of the present application is shown. Figure 1 and Figure 3As shown, the torque loading device 140 is disposed on the upper platform plate 131. The torque loading device 140 includes a motor 142, a transmission shaft 143 and an upper fixture 141. The motor 142 is used to drive the transmission shaft 143 to rotate. The selection of the motor 142 depends on the required torque size and speed requirements. Usually, a motor 142 with stable performance and high-precision control is selected to ensure that the required torque can be accurately provided during the test. The transmission shaft 143 passes downward through the upper platform plate 131 and the kettle cover 122, and the upper fixture 141 is disposed at the bottom of the transmission shaft 143. During the test, the rotation of the upper fixture 141 will affect the ball screw pair 200 (reference Figure 6 ) applies a torque. This torque simulates the rotation load that the ball screw pair 200 is subjected to in an actual working environment.

[0091] Figure 5 The structure diagram of the reaction kettle and the force loading device according to one embodiment of the present application is shown. Figure 1 and Figure 5 As shown, the force loading device 150 includes a force loading device 152, a force loading shaft 153 and a lower clamp 151 (refer to Figure 6 ). The force loader 152 is arranged on the base 111. The force loader 152 has a high-precision force control capability and can accurately output the set axial force. The force loader 152 is used to push the force loading shaft 153 upward. The force loading shaft 153 passes upward through the lower platform plate 112 and the bottom of the kettle body 121. The lower clamp 151 is arranged on the top of the force loading shaft 153. The lower clamp 151 is usually designed with sufficient friction and clamping force to ensure that when the force loading shaft 153 applies axial force, the ball screw pair 200 (reference Figure 6 ) can stably withstand axial forces without loosening or slipping.

[0092] Figure 6 The figure shows the use state of the upper clamp and the lower clamp of one embodiment of the present application. Figure 1 and Figure 6 In the reactor 120, the upper clamp 141 to which the torque is applied by the torque loading device 140 and the lower clamp 151 to which the force loading device 150 applies an upward thrust can clamp the ball screw pair 200 up and down, so that the ball screw pair 200 can be tested in a relatively closed and controllable environment to simulate various conditions that it may encounter in actual working conditions. Because in some working environments with high temperature, high pressure or special media, the friction performance of the ball screw pair 200 will be affected. The sealing structure formed by the reactor 120 can accurately simulate these actual working conditions by controlling the internal environment, such as temperature, pressure or medium, so as to study the friction degradation behavior of the ball screw pair 200 under these conditions.

[0093] Figure 2 yes Figure 1 Schematic diagram of the reactor and lifting device in the reference Figure 2 In some examples, the lifting device 132 includes an outer tube 1321, an inner tube 1322, a guide shaft 1323 and a guide shaft support 1324. The outer tube 1321 is vertically arranged on the lower platform plate 112, and the inner tube 1322 is fixed to the bottom of the upper platform plate 131 by bolts. The outer tube 1321 and the inner tube 1322 are plugged and slidably matched to form a telescopic structure. The outer tube 1321 is similar to a protective cover and a supporting structure, providing guidance and limit for the telescopic movement of the inner tube 1322. During the lifting and lowering process of the upper platform plate 131, the inner tube 1322 slides up and down smoothly along the inner wall of the outer tube 1321 to ensure the stability of the upper platform plate 131 during the lifting and lowering process. The guide shaft support 1324 is fixed on the lower platform plate 112, the guide shaft 1323 is vertically arranged, the bottom of the guide shaft 1323 is connected to the guide shaft support 1324, and the top of the guide shaft 1323 passes through the upper platform plate 131 upward. In this example, there are two sets of telescopic structures composed of the outer tube 1321 and the inner tube 1322, which are symmetrically installed on both sides of the reactor 120, so that the lifting process can be more stable and balanced. Because the symmetrical structure can effectively disperse the load, avoid tilting or uneven force during the lifting process, it is conducive to accurately controlling the closing process of the reactor cover 122 and the reactor body 121.

[0094] In some examples, the lifting device 132 also includes a linear bearing 1325 and a connecting flange 1326. The linear bearing 1325 is arranged in the mounting hole of the upper platform plate 131 and cooperates with the guide shaft 1323. The guide shaft 1323 slides in the linear bearing 1325, and the linear bearing 1325 and the guide shaft 1323 provide a guide path. In the process of the lifting mechanism 130 running and driving the upper platform plate 131 to rise and fall, the guide shaft 1323 moves linearly along the axial direction preset by the linear bearing 1325 to avoid lateral deviation or shaking, thereby ensuring that the kettle cover 122 can be accurately covered on the kettle body 121 to maintain the sealing and stability of the experimental environment. The upper platform plate 131 is connected to the kettle cover 122 by means of the connecting flange 1326, so that the upper platform plate 131 and the kettle cover 122 are connected as a whole. The connecting flange 1326 makes it easier to install and disassemble the upper platform plate 131 and the kettle cover 122.

[0095] In some examples, the reactor 120 further includes a sealing ring 123 and a reactor body base 124. The sealing ring 123 is installed at the contact portion between the reactor cover 122 and the reactor body 121 to form a sealing interface to ensure the sealing inside the reactor 120. The reactor body base 124 is arranged on the lower platform plate 112, and the bottom of the reactor body 121 is fixed on the reactor body base 124. The reactor body base 124 is used to provide structural support for the reactor 120 to prevent it from shaking or displacement. In addition, the reactor body base 124 isolates the reactor body 121 from the lower platform plate 112, reduces the erosion and wear of the reactor body 121 by external factors, and prolongs the service life of the reactor body 121.

[0096] refer to Figure 3 In some examples, the torque loading device 140 further includes a motor base 144 and a coupling 145. The motor base 144 is fixedly disposed on the upper platform plate 131, and the motor 142 is disposed on the motor base 144. The motor 142 applies torque to the transmission shaft 143 through the coupling 145.

[0097] Combined with reference Figure 1 and Figure 3 In some examples, the torque loading device 140 also includes an anti-torsion frame 146. The anti-torsion frame 146 is fixedly arranged at the bottom of the upper platform plate 131, and the transmission shaft 143 passes downward through the anti-torsion frame 146 and the lower platform plate 112 and extends into the kettle body 121. The anti-torsion frame 146 provides additional support and limitation for the transmission shaft 143. When the transmission shaft 143 rotates at high speed and transmits torque, torsional force will be generated. The anti-torsion frame 146 can constrain the transmission shaft 143 to prevent it from unnecessary twisting or swinging, and ensure that the transmission shaft 143 rotates stably along the predetermined axis, thereby improving the accuracy and reliability of the entire torque loading process. The transmission shaft 143 passes downward through the anti-torsion frame 146 and the lower platform plate 112 and extends into the kettle body 121, thereby introducing the power of the motor 142 into the reactor 120 and applying a suitable torque to the ball screw pair 200.

[0098] Figure 4 yes Figure 3 AA section view, combined with Figure 3 and Figure 4As shown, in some examples, the torque loading device 140 also includes an angular contact ball bearing 147 and a deep groove ball bearing 148. The angular contact ball bearing 147 is fixed on the upper platform plate 131, and the deep groove ball bearing 148 is fixed on the anti-torsion frame 146. The transmission shaft 143 passes downward through the angular contact ball bearing 147 and the deep groove ball bearing 148. The angular contact ball bearing 147 can withstand axial and radial loads to ensure that the transmission shaft 143 does not deviate during rotation. The deep groove ball bearing 148 assists in supporting the transmission shaft 143 and mainly bears radial loads. The angular contact ball bearing 147 includes a first bearing end cover 1471, a bearing sleeve 1472, a round nut 1473 and an adjusting gasket 1474. Among them, the first bearing end cover 1471 is used to protect the angular contact ball bearing 147. The round nut 1473 is used to fasten the first bearing end cover 1471 and the bearing sleeve 1472, and the adjusting washer 1474 is used to adjust the clearance between the first bearing end cover 1471 and the bearing sleeve 1472. The deep groove ball bearing 148 includes a second bearing end cover 1481, and the second bearing end cover 1481 is used to protect the deep groove ball bearing 148. The angular contact ball bearing 147 and the deep groove ball bearing 148 cooperate with the anti-torsion frame 146 from the overall structure to ensure that the torque applied by the motor 142 is stably loaded to the upper clamp 141.

[0099] In some examples, the torque loading device 140 further includes a first skeleton oil seal 1491 and a second skeleton oil seal 1492. The first skeleton oil seal 1491 is mounted on the first bearing end cover 1471, and forms a seal between the first bearing end cover 1471 and the transmission shaft 143 to isolate external air and dust. The second skeleton oil seal 1492 is mounted on the bottom surface of the kettle cover 122, and forms a seal between the kettle cover 122 and the transmission shaft 143 to isolate external impurities from entering the interior of the kettle body 121.

[0100] refer to Figure 5In some examples, the force loading device 150 also includes a force sensor 154 and a water cooling jacket 155. The force loader 152 is connected to the force loading shaft 153 through the force sensor 154. The force sensor 154 can accurately measure the magnitude of the force loaded, and then transfer the force to the force loading shaft 153 to achieve axial force loading on the ball screw pair 200. In this embodiment, the force loader 152 is an electric push cylinder. As an example and not a limitation, the force loader 152 can also be an electromagnetic thruster, a hydraulic cylinder or a pneumatic push rod. The water cooling jacket 155 is installed at the bottom of the kettle body 121, and the force loading shaft 153 passes through the water cooling jacket 155 upward and extends into the kettle body 121. The cold water jacket is used to achieve sealing and cooling of the force loading shaft 153. During the test, the heat in the reactor 120 will gather and be transferred to the force loading shaft 153. The water cooling jacket 155 transfers the heat on the shaft to the internal cooling water through heat conduction. The cooling water flows in from the joint at one end of the water-cooling jacket 155, absorbs heat during the flow in the water-cooling jacket 155, and then flows out from the joint at the other end, thereby achieving sealing and cooling of the force loading shaft 153, and preventing the force loading shaft 153 from being affected in performance or damaged due to overheating. This design ensures the stability and reliability of the force loading device 150 during long-term operation. Further, the force loading device 150 also includes an upper connecting member 1561 and a lower connecting member 1562. The upper connecting member 1561 is used to connect the force loading shaft 153 and the top of the force sensor 154. The upper connecting member 1561 is adapted to the force loading shaft 153 and the force sensor 154 to ensure that the two are firmly connected. The lower connecting member 1562 is used to connect the bottom of the sensor and the force loader 152. The lower connecting member 1562 is adapted to the respective interfaces of the force sensor 154 and the force loader 152, so that the force output by the force loader 152 can be transmitted to the upper connecting member 1561 and the force loading shaft 153 through the force sensor 154.

[0101] In some examples, the reactor 120 also includes a guide sleeve 125. The guide sleeve 125 is disposed at the bottom of the reactor body 121, and the force-loading shaft 153 passes upward through the guide sleeve 125. The guide sleeve 125 has a guiding function to ensure that the movement path of the force-loading shaft 153 always maintains a vertical direction to avoid deviation, shaking, and the like. The guide sleeve 125 also plays a role in protecting the force-loading shaft 153. Due to the complex internal environment of the reactor 120, the corrosion and wear of the force-loading shaft 153 can be reduced to a certain extent, thereby extending its service life. At the same time, the guide sleeve 125 assists in bearing part of the radial force of the force-loading shaft 153 during its movement, provides stable support for the shaft body, and maintains the mechanical balance of the force-loading shaft 153.

[0102] refer to Figure 6As shown, the torque loading device 140 also includes a gasket 157. The gasket 157 is arranged between the lower clamp 151 and the force loading shaft 153. The gasket 157 can be a circular ring made of silicone material, which is soft and easy to be squeezed and deformed. The gasket 157 is used to achieve a close fit between the lower clamp 151 and the force loading shaft 153. During the operation of the entire device, part of the impact force and vibration are buffered, and the risk of wear caused by rigid contact is reduced. Furthermore, the lower clamp 151 can adopt a circular flat plate, and its surface roughness is not less than 3.2. The lower clamp 151 provides a support platform for the ball screw pair 200. The ball screw pair 200 is placed on the lower clamp 151, and the static friction force is used to ensure that the ball screw pair 200 is stationary.

[0103] Figure 7 yes Figure 6 BB section view. Combined with reference Figure 6 and Figure 7 As shown, in some examples, the torque loading device 140 also includes an anti-twist end cap 1581 and an anti-rotation shaft 1582. The anti-twist end cap 1581 is fixed on the guide sleeve 125. The anti-rotation shaft 1582 is inserted into the lower fixture 151 in the horizontal direction. The anti-twist end cap 1581 and the anti-rotation shaft 1582 cooperate to limit the rotation of the lower fixture 151. When the torque loading device 140 starts to operate, the upper fixture 141 rotates driven by the transmission shaft 143, and when torque is applied to the ball screw pair 200, the lower fixture 151 is easily disturbed and rotates unnecessary. The anti-twist end cap 1581 and the anti-rotation shaft 1582 cooperate with each other to form an effective limit mechanism, which constrains the rotational freedom of the lower fixture 151, allows the lower fixture 151 to stably bear the axial force, and avoids interference from the rotational movement, thereby ensuring the accuracy and stability of the entire simulated ball screw pair 200 friction degradation behavior test.

[0104] In some examples, the torque loading device 140 also includes a positioning steel ball 159. The positioning steel ball 159 is arranged between the lower clamp 151 and the force loading shaft 153. The positioning steel ball 159 is placed above the force transmission shaft 143. A conical groove is formed on the bottom surface of the lower clamp 151 to cooperate with the positioning steel ball 159. This cooperation between the positioning steel ball 159 and the lower clamp 151 can effectively ensure that the upper clamp 141 and the lower clamp 151 always maintain the same horizontal position. During the initial installation, the positioning steel ball 159 cannot support the lower clamp 151 well, which may result in the upper clamp 141 and the lower clamp 151 not being able to ensure a good fit when the lifting mechanism 130 presses the upper clamp 141 downward. After the test starts, the force loading shaft 153 continues to apply thrust, and with the gasket 157 being squeezed and deformed, the positioning steel ball 159 can gradually realize its leveling function, while ensuring that the initial position of the lower clamp 151 is stable.

[0105] It will be apparent to those skilled in the art that various modifications and variations may be made to the above exemplary embodiments of the present invention without departing from the spirit and scope of the present invention. Therefore, it is intended that the present invention covers modifications and variations of the present invention that fall within the scope of the appended claims and their equivalent technical solutions.

Claims

1. A test device for simulating the friction degradation behavior of a ball screw pair, comprising: A stand, comprising a base and a lower platform plate, wherein the lower platform plate is arranged on the base; The reaction kettle comprises a kettle body and a kettle cover, wherein the kettle body is arranged on the lower platform plate, and the kettle cover is used to cover the top of the kettle body to form a sealing structure inside the kettle body; the reaction kettle further comprises a sealing ring and a kettle body base, wherein the sealing ring is arranged between the kettle body and the kettle cover, the kettle body base is arranged on the lower platform plate, and the bottom of the kettle body is fixed on the kettle body base; A lifting mechanism, comprising an upper platform plate and a lifting device, wherein the lifting device is arranged on the lower platform plate, the kettle cover is arranged on the bottom surface of the upper platform plate, and the lifting device is used to lift the upper platform plate; A torque loading device is arranged on the upper platform plate, and the torque loading device comprises a motor, a transmission shaft and an upper clamp, wherein the motor is used to drive the transmission shaft to rotate, the transmission shaft passes downward through the upper platform plate and the kettle cover, and the upper clamp is arranged at the bottom of the transmission shaft; A force loading device comprises a force loader, a force loading shaft and a lower clamp, wherein the force loader is arranged on the base and is used to push the force loading shaft upward, the force loading shaft passes through the lower platform plate and the bottom of the kettle body upward, and the lower clamp is arranged on the top of the force loading shaft; the force loading device also comprises a force sensor and a water cooling jacket, the force loader is connected to the force loading shaft through the force sensor, the water cooling jacket is arranged on the bottom surface of the kettle body base, and the force loading shaft passes through the water cooling jacket upward and extends into the kettle body.

2. The test device for simulating the friction degradation behavior of a ball screw pair according to claim 1, characterized in that: The lifting device includes an outer tube, an inner tube, a guide shaft and a guide shaft support. The outer tube is vertically arranged on the lower platform plate, the inner tube is fixed to the bottom of the upper platform plate, and the outer tube and the inner tube are plugged and slidably matched; the guide shaft support is fixed to the lower platform plate, the guide shaft is vertically arranged, the bottom of the guide shaft is connected to the guide shaft support, and the top of the guide shaft passes through the upper platform plate upward.

3. The test device for simulating the friction degradation behavior of a ball screw pair according to claim 1, characterized in that: The lifting mechanism further comprises a connecting flange, and the upper platform plate is connected to the kettle cover via the connecting flange.

4. The test device for simulating the friction degradation behavior of a ball screw pair according to claim 1, characterized in that: The torque loading device includes a motor base and a coupling. The motor base is fixedly arranged on the upper platform plate, the motor is arranged on the motor base, and the motor applies torque to the transmission shaft through the coupling.

5. The test device for simulating the friction degradation behavior of a ball screw pair according to claim 1, characterized in that: The torque loading device also includes an anti-twist frame, which is fixedly arranged at the bottom of the upper platform plate. The transmission shaft passes downward through the anti-twist frame and the lower platform plate and extends into the kettle body.

6. The test device for simulating the friction degradation behavior of a ball screw pair according to claim 1, characterized in that: The reactor further comprises a guide sleeve, which is arranged at the bottom of the reactor body, and the force loading axially passes through the guide sleeve.

7. The test device for simulating the friction degradation behavior of a ball screw pair according to claim 6, characterized in that: The torque loading device also includes an anti-twist end cover and an anti-rotation shaft, wherein the anti-twist end cover is fixed on the guide sleeve, and the anti-rotation shaft is inserted into the lower clamp, and the anti-twist end cover and the anti-rotation shaft cooperate to limit the rotation of the lower clamp.

8. The test device for simulating the friction degradation behavior of a ball screw pair according to claim 6, characterized in that: The torque loading device also includes an angular contact ball bearing and a deep groove ball bearing. The angular contact ball bearing is fixed on the upper platform plate, the deep groove ball bearing is fixed on the anti-torsion frame, and the transmission shaft passes downward through the angular contact ball bearing and the deep groove ball bearing.

9. The test device for simulating the friction degradation behavior of a ball screw pair according to claim 8, characterized in that: The torque loading device further comprises a first skeleton oil seal and a second skeleton oil seal, wherein the first skeleton oil seal is disposed on the first bearing end cover of the angular contact ball bearing, and the second skeleton oil seal is disposed on the bottom surface of the kettle cover.

10. The test device for simulating the friction degradation behavior of a ball screw pair according to claim 6, characterized in that: The torque loading device also includes a positioning steel ball, which is arranged between the lower clamp and the force loading shaft.

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