A grease low-temperature torque test device

Abstract

The present invention relates to the technical field of grease performance testing, and particularly relates to a low-temperature torque testing device for grease, which comprises an outer box body. An insulation box and a refrigeration component are installed inside the outer box body. A torque detection component is installed inside the insulation box. A bearing, a grease delivery component and a grease recovery component are installed on the torque detection component. The grease delivery component is thermally connected to the refrigeration component. A temperature detection component is installed on the insulation box and the grease recovery component. A control component is installed on the outer box body. During the low-temperature torque test of the grease in this application, only the bearing needs to be installed in the torque detection component, and the automatic feeding of the grease can be completed through the grease delivery component. Automatic control can also be carried out by using the control component, which is beneficial to simplifying the preparation operation before the test. Moreover, the cooling efficiency of the grease and the bearing is improved, the waiting time for cooling before the test is reduced, and thus the efficiency of the low-temperature torque test of the grease is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of grease performance testing, and particularly relates to a grease low-temperature torque testing device. Background Art

[0002] In many industrial fields, such as aerospace, automobile manufacturing, precision instruments, etc., the performance of grease in a low-temperature environment is crucial. Low-temperature torque is one of the key indicators for measuring the low-temperature performance of grease, which directly affects the starting performance and operating efficiency of mechanical equipment under low-temperature conditions.

[0003] At present, the refrigeration method of the existing grease low-temperature torque testing devices on the market responds slowly, making it difficult to quickly reduce the test environment temperature to the target low temperature, and the temperature fluctuates greatly in the low-temperature environment, unable to provide a stable low-temperature condition for the test, resulting in large deviations in test results and a long test cycle. In addition, most of the existing testing devices have a simple structure and cumbersome operation. During the operation process, the operator needs to evenly apply the grease inside the bearing used for testing. The internal space of the bearing is narrow, making it difficult to ensure that the grease completely fills the inside of the bearing, and it is also easy to mix dust and other sundries in the external environment into the grease during the operation process. Therefore, it has high requirements for the professional skills of the operator and is not conducive to wide application in production practice and quality inspection.

[0004] Therefore, how to simplify the operation during the low-temperature torque test of grease and improve the detection efficiency at the same time is an urgent problem to be solved by those skilled in the art. Summary of the Invention

[0005] In order to simplify the operation during the low-temperature torque test of grease and improve the detection efficiency at the same time, the present application provides a grease low-temperature torque testing device.

[0006] The grease low-temperature torque testing device provided by the present application adopts the following technical solutions:

[0007] A grease low-temperature torque testing device includes an outer box body. An insulating box is installed inside the outer box body. A refrigeration component communicated with the insulating box is installed inside the outer box body. A torque detection component is rotatably connected inside the insulating box. A bearing for detecting grease is detachably installed on the torque detection component. A grease delivery component and a grease recovery component are also connected to the torque detection component. The grease delivery component is thermally connected to the refrigeration component. A temperature detection component is installed on the insulating box and the grease recovery component. A control component electrically connected to the refrigeration component, the torque detection component, the grease delivery component, the grease recovery component, and the temperature detection component is installed on the outer box body.

[0008] By adopting the above technical solution, during the low-temperature torque test of the grease, only the bearing needs to be installed in the torque detection component, and the automatic feeding of the grease can be completed through the grease conveying component. The control component can also be used for automatic control, which is beneficial to simplifying the preparation operation before the test. Moreover, the cold generated by the refrigeration component can not only cool the torque detection component, the bearing and the grease inside the bearing through the heat insulation box, but also cool the grease in the conveying component to a low temperature state in advance through the heat conduction connection between the grease conveying component and the refrigeration component. This effectively improves the cooling efficiency of the grease and the bearing, reduces the waiting time for cooling before the test, and thus improves the efficiency of the low-temperature torque test of the grease.

[0009] Further, a heat insulation door is hermetically installed through the side wall of the outer box at the front end of the heat insulation box. The heat insulation door is rotatably connected to the outer box, and heat insulation layers are attached to the inner wall of the heat insulation box and the side of the heat insulation door facing the inside of the heat insulation box.

[0010] By adopting the above technical solution, the hermetic installation between the heat insulation door and the heat insulation box greatly reduces the heat transfer from the outside through the door opening. The heat insulation layers are attached to the inner wall of the heat insulation box and the side of the heat insulation door facing the inside, further enhancing the heat insulation effect, making the low-temperature environment inside the heat insulation box more stable, reducing the working burden of the refrigeration component, and being beneficial to reducing energy consumption. Moreover, the heat insulation door and the heat insulation layers can effectively reduce heat interference, ensure a constant temperature during the test, make the data detected by the torque detection component more accurate and reliable, and improve the test accuracy and reliability of the entire test device.

[0011] Further, the refrigeration component includes a refrigerator electrically connected to the control component, and a first heat exchange tube is connected to the refrigerator; an air inlet and an air outlet are arranged side by side up and down at the rear end of the heat insulation box. A first heat exchange box is fixedly and hermetically installed on the heat insulation box corresponding to the air outlet, and a second heat exchange box is fixedly and hermetically installed on the heat insulation box corresponding to the air inlet. An axial flow fan electrically connected to the control component is installed between the first heat exchange box and the second heat exchange box; the first heat exchange tube is installed inside the first heat exchange box, a second heat exchange tube is installed inside the second heat exchange box, and the second heat exchange tube is connected in series in the grease conveying component.

[0012] By adopting the above technical solution, the axial flow fan can be used to drive air circulation. On the one hand, the air in the heat insulation box continuously conducts deep heat exchange with the first heat exchange tube, which can quickly and effectively reduce the temperature inside the heat insulation box, meeting the requirement for the rapid formation of a low-temperature environment in the low-temperature torque test of grease. On the other hand, while cooling the heat insulation box, the grease in the grease conveying assembly exchanges heat with the cold air through the second heat exchange tube, achieving synchronous cooling of the grease and the test environment, enabling the grease to be tested under low-temperature conditions similar to the actual use scenario, and improving the accuracy and reliability of the test results. Moreover, the air circulates between the heat insulation box, the first heat exchange box, and the second heat exchange box, ensuring that the temperature in each area of the heat insulation box is relatively uniform, avoiding test errors caused by local temperature differences, and providing a stable and uniform low-temperature environment for the grease test.

[0013] Further, the torque detection assembly includes a driving hollow shaft, the driving hollow shaft is rotatably connected to the side wall of the heat insulation box, one end of the driving hollow shaft facing the inside of the heat insulation box is fixedly installed with a bearing outer ring mounting sleeve, the outer side of one end of the driving hollow shaft facing the outside of the heat insulation box is drivingly connected with a driving member electrically connected to the control assembly, the side wall of the heat insulation box is rotatably connected with a driven hollow shaft coaxially arranged with the driving hollow shaft, the driven hollow shaft is rotatably connected with a first mounting plate, the first mounting plate is annularly and evenly provided with a first telescopic member and a second telescopic member electrically connected to the control assembly, the telescopic end of the first telescopic member is installed with a second mounting plate, the second mounting plate is fixedly installed with a bearing inner ring mounting shaft, the bearing is installed between the bearing inner ring mounting shaft and the bearing outer ring mounting sleeve, and the outer side of the first mounting plate is drivingly connected with a first torque detector electrically connected to the control assembly.

[0014] By adopting the above technical solution, driving the rotation of the bearing outer ring mounting sleeve by the driving hollow shaft and the cooperation of the bearing inner ring mounting shaft and the first mounting plate can truly simulate the operation of the bearing in actual work, making the test results more accurately reflect the performance of the grease under actual working conditions. The setting of the first telescopic member can not only accurately position the installation position of the bearing, but also facilitate the installation and disassembly of the bearing, improving the convenience of using the equipment. The first torque detector directly detects the torque of the first mounting plate connected to the bearing inner ring, reducing the error in the intermediate link, and can accurately obtain the low-temperature torque data of the grease, improving the accuracy of the test. The entire torque detection process is uniformly controlled by the control assembly, realizing automated operation, reducing the interference of human factors, and improving the efficiency and reliability of the test.

[0015] Further, a first gear disk is coaxially and fixedly installed on the outer side of the first mounting disk. An installation plate is fixedly installed inside the heat insulation box. The first torque detector is fixedly installed on the installation plate. A first gear is fixedly installed on the first torque detector. The first gear meshes with the first gear disk. A second gear disk is fixedly installed on the bearing outer ring installation sleeve. A second torque detector electrically connected to the control component is fixedly installed on the installation plate corresponding to the second gear disk. A second gear is fixedly installed on the second torque detector. The second gear meshes with the second gear disk.

[0016] By adopting the above technical solution, two torque detectors are set to detect the rotational torques of the inner and outer rings of the bearing respectively, so as to obtain the action data of the grease during the operation of the bearing from multiple angles and more comprehensively evaluate the performance of the grease. By means of gear meshing transmission, the torque is transmitted to the torque detector, which can reduce the installation error and vibration interference compared with direct connection, make the torque detection more accurate, and improve the reliability of the test data. The control component comprehensively analyzes the data of the two torque detectors, can dig out more information about the grease performance, such as judging the lubrication effect difference of the grease in different parts according to the torque difference between the inner and outer rings, and provides more valuable reference for the research and development and improvement of the grease.

[0017] Further, the telescopic end of the second telescopic member slidably penetrates through the second mounting disk and is installed with a third mounting disk. A bearing outer ring installation sleeve cover that is hermetically slidably sleeved on the bearing inner ring installation shaft is fixedly installed on the third mounting disk. The bearing outer ring installation sleeve cover corresponds to the bearing outer ring installation sleeve. A grease delivery channel is opened on the bearing inner ring installation shaft corresponding to the bearing outer ring installation sleeve cover. One end of the bearing inner ring installation shaft facing the driven hollow shaft is installed with a connecting pipe communicated with the grease delivery channel. The connecting pipe is hermetically communicated with one end of the driven hollow shaft located inside the heat insulation box. One end of the driven hollow shaft located outside the heat insulation box is hermetically and rotationally connected with the grease delivery component. A grease recovery channel communicated with the active hollow shaft is opened inside the bearing outer ring installation sleeve. One end of the active hollow shaft located outside the heat insulation box is hermetically and rotationally connected with the grease recovery component.

[0018] By adopting the above technical solution, the second telescopic member can be used to control the sealing combination and separation of the bearing outer ring mounting cover and the bearing outer ring mounting sleeve. When the second telescopic member is controlled to extend to make the bearing outer ring mounting cover and the bearing outer ring mounting sleeve be sealed and combined, a closed grease conveying channel can be constructed at both ends of the bearing, which can not only conveniently fill the grease to be tested inside the bearing, but also utilize the continuously conveyed grease to regulate and detect the temperature inside the bearing. When the second telescopic member is controlled to retract to separate the bearing outer ring mounting cover and the bearing outer ring mounting sleeve, during the low-temperature torque test of the grease, the interference caused by their contact to the test can be avoided, ensuring that the test results truly reflect the low-temperature torque performance of the grease.

[0019] Further, the grease conveying assembly includes a conveying cylinder, a piston body is hermetically and slidably connected inside the conveying cylinder, a third telescopic member fixedly connected to the piston body and electrically connected to the control assembly is provided, a one-way input valve and a one-way output valve are installed at one end of the conveying cylinder away from the third telescopic member, an input pipe is connected to the one-way input valve, a first output pipe is connected to the one-way output valve, the first output pipe is thermally connected to the refrigeration assembly and then connected to a second output pipe, and the second output pipe is connected to the torque detection assembly.

[0020] By adopting the above technical solution, by the expansion and contraction of the third telescopic member, the movement of the piston body in the conveying cylinder can be accurately controlled, and then the conveying amount and conveying speed of the grease can be accurately controlled to meet the requirements of different tests for the grease usage amount and conveying rhythm. The setting of the one-way input valve and the one-way output valve ensures that the grease can only flow in a predetermined direction, preventing the grease from flowing back during the conveying process, and ensuring the stability and reliability of the conveying process. The first output pipe is thermally connected to the refrigeration assembly, so that the grease can be cooled to a low temperature in time during the conveying process, enabling the grease conveyed to the torque detection assembly to quickly enter the low-temperature state, reducing the cooling time before the test, and being beneficial to improving the test efficiency.

[0021] Further, the grease recovery assembly includes a recovery pipe connected to the torque detection assembly, an electronically controlled opening regulating valve is connected to the recovery pipe, the electronically controlled opening regulating valve is electrically connected to the control assembly, and a collection box is detachably connected to the end of the recovery pipe.

[0022] By adopting the above technical solution, by the control of the control assembly over the electronically controlled opening regulating valve, the conveying speed of the grease or the cleaner can be accurately adjusted. According to different working requirements and the characteristics of the grease, the opening can be flexibly adjusted. On the one hand, it ensures that the grease can be fully filled inside the bearing, and on the other hand, it can completely remove the grease inside the bearing.

[0023] Further, the temperature detection component includes a first temperature sensor and a second temperature sensor electrically connected to the control component. The first temperature sensor is fixedly and hermetically installed inside the heat insulation box, and the second temperature sensor is fixedly and hermetically installed on the recovery pipe.

[0024] By adopting the above technical solution, the first temperature sensor and the second temperature sensor can be used to real-time feedback the temperature conditions inside the heat insulation box and inside the bearing, ensuring that the test environment temperature is stable and meets the requirements, which helps to ensure that the low-temperature torque test of the grease is carried out under the set temperature conditions, and improves the accuracy and reliability of the test.

[0025] Further, the control component includes a controller, on which a control panel and a display screen are installed. The controller is electrically connected to the control panel and the display screen, and the controller is electrically connected to the refrigeration component, the torque detection component, the grease delivery component, the grease recovery component and the temperature detection component.

[0026] By adopting the above technical solution, each component of the entire grease low-temperature torque test system is integrated under a control system, and centralized control of multiple links such as refrigeration, torque detection, grease delivery and recovery, and temperature detection is realized through the controller, avoiding the tediousness of individual operation of each component, and improving the operation efficiency and coordination of the system. The settings of the control panel and the display screen enable the operator to conveniently operate and monitor the system. The operator can complete various parameter settings and instruction inputs on one interface, and at the same time intuitively obtain the operation information of the system, reducing the operation difficulty and improving the work efficiency. The controller can accurately control the operation of each component according to the preset program and the received feedback signal, ensuring that parameters such as temperature, grease delivery volume, and recovery speed during the low-temperature torque test of the grease can meet the set requirements, thereby improving the accuracy and reliability of the test results.

[0027] The beneficial effects achieved:

[0028] During the low-temperature torque test of the grease in this application, only need to install the bearing in the torque detection component, and the automatic feeding of the grease can be completed through the grease delivery component, and the automatic control can also be carried out by using the control component, which is beneficial to simplify the preparation operation before the test and improve the work efficiency of the low-temperature torque test of the grease.

[0029] By using the cooling capacity generated by the refrigeration component, the present application can not only cool down the torque detection component, the bearing, and the grease inside the bearing through the heat insulation box, but also cool the grease in the conveying component to a low temperature state in advance through the heat conduction connection between the grease conveying component and the refrigeration component. This effectively improves the cooling efficiency of the grease and the bearing, reduces the waiting time for cooling before the test, and thus also improves the efficiency of the low-temperature torque test on the grease. Description of the Drawings

[0030] Figure 1 is the overall structural schematic diagram of an embodiment of the present application.

[0031] Figure 2 is the internal structural schematic diagram of an embodiment of the present application.

[0032] Figure 3 is the structural decomposition schematic diagram of an embodiment of the present application.

[0033] Figure 4 is the cross-sectional structural schematic diagram of an embodiment of the present application.

[0034] Figure 5 is the structural decomposition schematic diagram of the refrigeration component in an embodiment of the present application.

[0035] Figure 6 is the structural decomposition schematic diagram of the torque detection component in an embodiment of the present application.

[0036] Figure 7 is the installation structural schematic diagram of the grease recovery component in an embodiment of the present application.

[0037] Description of reference numerals: 100, outer box body; 101, support pad; 102, rear cover plate; 103, heat dissipation window; 104, access opening; 105, mounting seat; 200, heat insulation box; 201, heat insulation door; 202, thermal insulation layer; 300, refrigeration component; 301, refrigerator; 302, first heat exchange tube; 303, air inlet; 304, air outlet; 305, first heat exchange box; 306, second heat exchange box; 307, axial flow fan; 308, second heat exchange tube; 400, torque detection component; 401, driving hollow shaft; 402, bearing outer ring mounting sleeve; 403, driving member; 4031, motor; 4032, first bevel gear; 4033, second bevel gear; 404, driven hollow shaft; 405, first mounting plate; 406, first telescopic member; 407, second telescopic member; 408, second mounting plate; 409, third mounting plate; 410, bearing inner ring mounting shaft; 411, bearing outer ring mounting sleeve cover; 412, first torque detector; 413, grease delivery channel; 414, connecting pipe; 415, grease recovery channel; 416, first gear disk; 417, mounting plate; 418, first gear; 419, second gear disk; 420, second torque detector; 421, second gear; 500, grease delivery component; 501, delivery cylinder; 502, piston body; 503, third telescopic member; 504, one-way input valve; 505, one-way output valve; 506, input pipe; 507, first output pipe; 508, second output pipe; 600, grease recovery component; 601, recovery pipe; 602, electronically controlled opening regulating valve; 603, collection box; 700, temperature detection component; 701, first temperature sensor; 702, second temperature sensor; 800, control component; 801, controller; 802, control panel; 803, display screen; 900, bearing. Detailed implementation manners

[0038] The following will further elaborate on this application in conjunction with the attached Figure 1-7 drawings.

[0039] In the description of this application, it should be noted that the orientation or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the orientation or positional relationships shown in the drawings. These are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention. In addition, the terms "first", "second", and "third" are only used for descriptive purposes and should not be construed as indicating or implying relative importance.

[0040] In the description of the present application, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0041] The embodiment of the present application discloses a lubricating grease low-temperature torque testing device.

[0042] Please refer to Figures 1 to 7 , in an embodiment of the present application, a lubricating grease low-temperature torque testing device includes an outer box body 100. An insulating box 200 is installed inside the outer box body 100. A refrigeration component 300 communicated with the insulating box 200 is installed inside the outer box body 100. A torque detection component 400 is rotatably connected inside the insulating box 200. A bearing 900 for detecting the lubricating grease is detachably installed on the torque detection component 400. A lubricating grease conveying component 500 and a lubricating grease recycling component 600 are also connected to the torque detection component 400. The lubricating grease conveying component 500 is thermally connected to the refrigeration component 300. A temperature detection component 700 is installed on the insulating box 200 and the lubricating grease recycling component 600. A control component 800 electrically connected to the refrigeration component 300, the torque detection component 400, the lubricating grease conveying component 500, the lubricating grease recycling component 600, and the temperature detection component 700 is installed on the outer box body 100.

[0043] The implementation principle of a lubricating grease low-temperature torque testing device according to an embodiment of the present application is:

[0044] First, the bearing 900 for detecting grease is detachably installed on the torque detection assembly 400. Then, the refrigeration assembly 300 is started through the control assembly 800. The cold generated by the refrigeration assembly 300 forms a stable low-temperature environment inside the heat insulation box 200 through connection with the heat insulation box 200. At the same time, the grease to be detected is continuously transported to the bearing 900 on the torque detection assembly 400 through the grease delivery assembly 500, and the grease to be detected entering the bearing 900 will be discharged through the grease recovery assembly 600. Since the grease delivery assembly 500 is thermally connected to the refrigeration assembly 300, the grease in the delivery assembly is also cooled to a low temperature state. Meanwhile, the temperature detection assembly 700 monitors the temperature inside the heat insulation box 200 (the temperature outside the bearing 900) and the temperature of the grease in the grease recovery assembly 600 (the temperature inside the bearing 900) in real time, and feeds back the data to the control assembly 800. The control assembly 800 performs real-time regulation on the refrigeration assembly 300 according to the temperature data. When the temperature detection assembly 700 monitors that the temperatures inside and outside the bearing 900 are both at the set temperature, the control assembly 800 automatically controls the grease delivery assembly 500 to stop transporting and controls the torque detection assembly 400 to drive the bearing 900 to rotate. During this process, the torque detection assembly 400 detects the torque change during rotation in real time and transmits the data to the control assembly 800, thereby completing the low-temperature torque test of the grease.

[0045] Please refer to Figures 1 to 7 , in a specific embodiment of the present application, a support pad 101 is installed at the bottom of the outer box 100. Installing the support pad 101 at the bottom of the outer box 100 mainly serves to support the entire device and keep it stably placed on the ground or other supporting surfaces.

[0046] Please refer to Figures 1 to 7 , in a specific embodiment of the present application, a rear cover plate 102 is detachably installed at the rear end of the outer box 100. The rear cover plate 102 is detachably installed at the rear end of the outer box 100. When it is necessary to maintain, repair or replace the components inside the device, the rear cover plate 102 can be removed, facilitating the operator to operate on the inside of the device.

[0047] Please refer to Figures 1 to 7 , in a specific embodiment of the present application, a heat dissipation window 103 is provided on the rear cover plate 102 corresponding to the refrigeration assembly 300. The heat dissipation window 103 is provided at the position on the rear cover plate 102 corresponding to the refrigeration assembly 300. The refrigeration assembly 300 generates heat during operation, and the heat dissipation window 103 allows air to circulate and dissipates the heat generated by the refrigeration assembly 300 to the external environment, ensuring that the refrigeration assembly 300 operates within a suitable temperature range and avoiding affecting its performance and lifespan due to overheating.

[0048] Please refer toFigures 1 to 7 In an embodiment of the present application, a heat-insulating door 201 is hermetically installed through the side wall of the outer box body 100 at the front end of the heat-insulating box 200. The heat-insulating door 201 is rotatably connected to the outer box body 100, and heat-insulating layers 202 are attached to the inner wall of the heat-insulating box 200 and the side of the heat-insulating door 201 facing the inside of the heat-insulating box 200.

[0049] During the working process, the heat-insulating door 201 is rotatably connected to the outer box body 100, facilitating opening and closing operations. When the heat-insulating door 201 is opened, the bearing 900 for detecting grease can be conveniently installed on the torque detection assembly 400, and other components inside the heat-insulating box 200 can be inspected and maintained. When the heat-insulating door 201 is closed, a sealed space can be ensured inside the heat-insulating box 200. During the entire testing process, the refrigeration assembly 300 operates to keep the inside of the heat-insulating box 200 at a low temperature. By the synergistic effect of the heat-insulating door 201 and the heat-insulating layer 202, heat can be effectively prevented from entering the heat-insulating box 200, maintaining a stable low-temperature environment inside, ensuring the normal operation of the torque detection assembly 400, etc. under low-temperature conditions, and accurately detecting the low-temperature torque of the grease.

[0050] In some specific embodiments of the present application, the heat-insulating layer 202 can be made of polyurethane foam, polystyrene foam, aerogel felt, etc. Polyurethane foam has an extremely low thermal conductivity, which can effectively prevent heat transfer and can well maintain the low temperature inside the heat-insulating box in a low-temperature environment, reducing the energy consumption of the refrigeration assembly; it has a certain strength and toughness, can firmly adhere to the inner wall of the heat-insulating box and the heat-insulating door, is not easily damaged, and ensures the long-term stability of the heat-insulating layer. Polystyrene foam has a relatively low thermal conductivity, can provide a certain degree of heat insulation effect, and helps maintain the low-temperature environment inside the heat-insulating box; this material is relatively light in weight and will not add too much burden to the heat-insulating box and the heat-insulating door, which is beneficial to the overall structural design and operation of the equipment. Aerogel felt is a highly efficient heat-insulating material, whose thermal conductivity is much lower than that of traditional heat-insulating materials, can provide excellent heat insulation effect, and can effectively maintain the low temperature inside the heat-insulating box even at extremely low temperatures; aerogel felt is light and thin in texture, can achieve good heat insulation without adding too much space and weight, which is beneficial to the miniaturization and lightweight design of the equipment.

[0051] Please refer to Figures 1 to 7, in an implementation manner of the present application, the refrigeration component 300 includes a refrigerator 301 electrically connected to the control component 800, and a first heat exchange tube 302 is connected to the refrigerator 301; an air inlet 303 and an air outlet 304 are arranged side by side up and down at the rear end of the heat insulation box 200, a first heat exchange box 305 is fixedly and sealingly installed on the heat insulation box 200 corresponding to the air outlet 304, a second heat exchange box 306 is fixedly and sealingly installed on the heat insulation box 200 corresponding to the air inlet 303, and an axial flow fan 307 electrically connected to the control component 800 is installed between the first heat exchange box 305 and the second heat exchange box 306; the first heat exchange tube 302 is installed inside the first heat exchange box 305, a second heat exchange tube 308 is installed inside the second heat exchange box 306, and the second heat exchange tube 308 is connected in series in the grease conveying component 500.

[0052] During the working process, the control component 800 sends a start command to the refrigerator 301 according to the preset low-temperature test environment requirements. The refrigerator 301 starts to operate, generates cold quantity and transfers it to the first heat exchange box 305 through the first heat exchange tube 302. The axial flow fan 307 operates under the control of the control component 800, promoting the air in the heat insulation box 200 to flow into the first heat exchange box 305 from the air outlet 304 for deep heat exchange with the first heat exchange tube 302, being cooled into low-temperature air and then entering the second heat exchange box 306 through the axial flow fan 307. The cold air in the second heat exchange box 306 enters the heat insulation box 200 again through the air inlet 303 to form a cycle, realizing the cooling of the interior of the heat insulation box 200. At the same time, the grease flowing in the grease conveying component 500 will enter the second heat exchange tube 308 to exchange heat with the cold air in the second heat exchange box 306, thereby realizing the cooling of the grease. The temperature detection component 700 monitors the temperatures of the heat insulation box 200 and the grease recovery component 600 in real time and feeds the data back to the control component 800. The control component 800 adjusts the refrigeration intensity of the refrigerator 301 and the rotation speed of the axial flow fan 307 according to the feedback results to maintain a stable low-temperature environment.

[0053] Please refer to Figures 1 to 7In one embodiment of the present application, the torque detection component 400 includes an active hollow shaft 401, which is rotatably connected to the side wall of the heat insulation box 200, and a bearing outer ring mounting sleeve 402 is fixedly installed on one end of the active hollow shaft 401 facing the inside of the heat insulation box 200, and a driving member 403 electrically connected to the control component 800 is transmission-connected to the outer side of one end of the active hollow shaft 401 facing the outside of the heat insulation box 200, and a driven hollow shaft 404 coaxially arranged with the active hollow shaft 401 is rotatably connected to the side wall of the heat insulation box 200, and the driven hollow shaft A first mounting plate 405 is rotatably connected to 404, and a first telescopic member 406 and a second telescopic member 407 electrically connected to the control component 800 are evenly distributed in a ring shape on the first mounting plate 405. A second mounting plate 408 is installed at the telescopic end of the first telescopic member 406, and a bearing inner ring mounting shaft 410 is fixedly installed on the second mounting plate 408. The bearing 900 is installed between the bearing inner ring mounting shaft 410 and the bearing outer ring mounting sleeve 402. The outer side of the first mounting plate 405 is transmission-connected to a first torque detector 412 electrically connected to the control component 800.

[0054] During operation, the control component 800 controls the movement of the first telescopic member 406, and through telescopic adjustment, the bearing 900 is accurately installed between the bearing inner ring mounting shaft 410 and the bearing outer ring mounting sleeve 402, so that the bearing 900 is in a suitable test position. When performing a torque test, the control component 800 sends a command to the driving member 403, and the driving member 403 operates to drive the active hollow shaft 401 to rotate. Since the bearing outer ring mounting sleeve 402 is fixed on the active hollow shaft 401, the bearing outer ring mounting sleeve 402 rotates accordingly. When the active hollow shaft 401 drives the bearing outer ring mounting sleeve 402 to rotate, since the inner ring of the bearing 900 is connected to the first mounting plate 405 through the bearing inner ring mounting shaft 410, and the first mounting plate 405 is rotatably connected to the driven hollow shaft 404, relative rotation occurs between the inner ring and the outer ring of the bearing, and the grease plays a lubricating role therebetween. At this time, the first torque detector 412 detects the torque applied to the first mounting plate 405. Since the first mounting plate 405 is connected to the inner ring of the bearing, the detected torque reflects the torque generated by the inner ring of the bearing 900 due to the resistance of the grease, thereby obtaining the torque data of the grease in a low temperature environment. The control component 800 collects and processes the data transmitted by the first torque detector 412 to complete the detection of the low temperature torque of the grease.

[0055] Please refer to Figures 1 to 7, in an implementation manner of the present application, the driving member 403 is configured as a motor 4031. The motor 4031 is electrically connected to the control component 800. The motor 4031 is fixedly installed on the outer wall surface of the heat insulation box 200. A first bevel gear 4032 is fixedly installed on the motor 4031. A second bevel gear 4033 is fixedly installed corresponding to the first bevel gear 4032 on the outer side of one end of the driving hollow shaft 401 facing the outside of the heat insulation box 200. The first bevel gear 4032 meshes with the second bevel gear 4033.

[0056] During the working process, after the control component 800 sends a start command to the motor 4031, the motor 4031 starts to operate. The first bevel gear 4032 fixed on the motor 4031 rotates synchronously with the rotation of the motor 4031. Since the first bevel gear 4032 meshes with the second bevel gear 4033 fixed on the driving hollow shaft 401, according to the transmission principle of the bevel gear, the rotation of the first bevel gear 4032 drives the rotation of the second bevel gear 4033, thereby causing the driving hollow shaft 401 to start rotating. The rotation of the driving hollow shaft 401 drives the rotation of the bearing outer ring mounting sleeve 402 fixed at one end thereof, so as to realize the outer ring drive of the bearing 900 installed between the bearing outer ring mounting sleeve 402 and the bearing inner ring mounting shaft 410, simulating the operation of the bearing under actual working conditions for the low-temperature torque test of the grease.

[0057] Please refer to Figures 1 to 7 , in an implementation manner of the present application, a first gear disk 416 is coaxially and fixedly installed on the outer side of the first mounting disk 405. A mounting plate 417 is fixedly installed inside the heat insulation box 200. A first torque detector 412 is fixedly installed on the mounting plate 417. A first gear 418 is fixedly installed on the first torque detector 412. The first gear 418 meshes with the first gear disk 416. A second gear disk 419 is fixedly installed on the bearing outer ring mounting sleeve 402. A second torque detector 420 electrically connected to the control component 800 is fixedly installed on the mounting plate 417 corresponding to the second gear disk 419. A second gear 421 is fixedly installed on the second torque detector 420. The second gear 421 meshes with the second gear disk 419.

[0058] During the working process, when the torque detection component 400 starts to work, the driving member 403 drives the driving hollow shaft 401 to rotate, thereby causing the bearing outer ring mounting sleeve 402 to rotate, and the second gear disc 419 thereon rotates synchronously. The second gear disc 419 meshes with the second gear 421, driving the second gear 421 to rotate. Since the second gear 421 is fixed on the second torque detector 420, the second torque detector 420 can detect the torque change generated by the rotation of the second gear disc 419, reflecting the torque change when the driving member 403 drives the bearing outer ring to rotate during the detection process. At the same time, the first mounting disc 405 rotates with the rotation of the bearing inner ring. Because the first gear disc 416 is coaxially fixed on the outside of the first mounting disc 405, and the first gear disc 416 meshes with the first gear 418 fixed on the first torque detector 412, the first gear disc 416 drives the first gear 418 to rotate, and the first torque detector 412 can detect the torque when the first mounting disc 405 rotates. This torque reflects the rotational resistance of the bearing inner ring under the action of the grease. The control component 800 collects the data transmitted by the first torque detector 412 and the second torque detector 420, and comprehensively analyzes information such as the torque difference between the two, enabling a more comprehensive and accurate evaluation of the torque performance of the grease in a low-temperature environment.

[0059] Please refer to Figures 1 to 7 , in the specific embodiment of the present application, the first torque detector 412 and the second torque detector 420 are configured as strain gauge torque sensors. The strain gauge torque sensor is based on the strain effect. The strain gauge is pasted on the elastic shaft. When the shaft is deformed under the action of torque, the resistance value of the strain gauge changes, and the torque value is calculated by measuring the resistance change. For example: HBMT40B: It has extremely high precision, a linearity of up to ±0.03%, a wide range of measurement ranges, from 50 Nm to 10 kNm, and a working temperature range of -40°C to +120°C, which can adapt to low-temperature environments. It adopts a non-contact power supply and signal transmission method, but the strain gauge is in contact with the shaft during measurement, enabling dynamic and high-precision torque measurement. It is widely used in fields such as automotive engine testing and aerospace, and can accurately detect the torque affected by the grease when the shaft rotates at low temperatures.

[0060] It can be understood that in other embodiments of the present application, the first torque detector 412 and the second torque detector 420 can also be configured as magnetoelectric torque sensors, optoelectronic torque sensors, etc.

[0061] Please refer to Figures 1 to 7, in an embodiment of the present application, a third mounting plate 409 is slidably mounted through the telescopic end of the second telescopic member 407 on the second mounting plate 408. A bearing outer ring mounting cover 411 which is fixedly mounted on the third mounting plate 409 and is hermetically sleeved on the bearing inner ring mounting shaft 410 is provided. The bearing outer ring mounting cover 411 corresponds to the bearing outer ring mounting sleeve 402. A grease delivery channel 413 is provided on the bearing inner ring mounting shaft 410 corresponding to the bearing outer ring mounting cover 411. One end of the bearing inner ring mounting shaft 410 facing the driven hollow shaft 404 is mounted with a connecting pipe 414 communicating with the grease delivery channel 413. The connecting pipe 414 is hermetically connected to one end of the driven hollow shaft 404 located inside the heat insulation box 200. One end of the driven hollow shaft 404 located outside the heat insulation box 200 is hermetically and rotationally connected to the grease delivery assembly 500. A grease recovery channel 415 communicating with the driving hollow shaft 401 is provided inside the bearing outer ring mounting sleeve 402. One end of the driving hollow shaft 401 located outside the heat insulation box 200 is hermetically and rotationally connected to the grease recovery assembly 600.

[0062] During the working process, when it is necessary to deliver the grease to be detected into the bearing 900 for low-temperature torque test of the grease, the control assembly 800 controls the second telescopic member 407 to extend, pushing the third mounting plate 409 and the connected bearing outer ring mounting cover 411 to move towards the bearing outer ring mounting sleeve 402 until the two are hermetically and correspondingly fitted. At this time, the grease delivery assembly 500 starts to work under the control of the control assembly 800, delivering the low-temperature grease into the driven hollow shaft 404 through one end hermetically and rotationally connected to the driven hollow shaft 404, then entering the grease delivery channel 413 of the bearing inner ring mounting shaft 410 through the connecting pipe 414, and finally being delivered into the interior of the bearing 900.

[0063] During the process of delivering the grease, the driving member 403 can also be controlled to drive the driving hollow shaft 401 to rotate through program setting, so as to further rotate the bearing outer ring mounting sleeve 402, so that the grease can fill the interior of the bearing 900.

[0064] The grease inside the bearing 900 will enter the grease recovery channel 415 inside the bearing outer ring mounting sleeve 402, and then be delivered to the grease recovery assembly 600 through the channel hermetically communicating with the driving hollow shaft 401 from one end of the driving hollow shaft 401 located outside the heat insulation box 200. On the one hand, the recovery of the grease is realized, and on the other hand, the internal temperature of the bearing 900 can be detected in real time by monitoring the temperature of the recovered grease.

[0065] After the temperatures inside and outside the bearing 900 reach the set test temperature, the low-temperature torque test of the grease can be carried out. At this time, the second telescopic member 407 is controlled by the control component 800 to retract, thereby driving the third mounting plate 409 and the bearing outer ring mounting sleeve cover 411 connected thereto to move away from the bearing outer ring mounting sleeve 402 until the two are separated, avoiding the contact between the bearing outer ring mounting sleeve cover 411 and the bearing outer ring mounting sleeve 402 and affecting the low-temperature torque test of the grease.

[0066] After the test is completed, the bearing outer ring mounting sleeve cover 411 and the bearing outer ring mounting sleeve 402 are hermetically fitted correspondingly, and the cleaning agent is input into the bearing 900 inside the bearing outer ring mounting sleeve cover 411 and the bearing outer ring mounting sleeve 402 through the grease conveying component 500 for cleaning. The cleaned grease and cleaning agent will enter the grease recovery component 600 for the next test of greases of other specifications.

[0067] Please refer to Figures 1 to 7 , in an embodiment of the present application, the grease conveying component 500 includes a conveying cylinder 501. A piston body 502 is hermetically and slidably connected inside the conveying cylinder 501. A third telescopic member 503 electrically connected to the control component 800 is fixedly connected to the piston body 502. A one-way input valve 504 and a one-way output valve 505 are installed at one end of the conveying cylinder 501 away from the third telescopic member 503. An input pipe 506 is connected to the one-way input valve 504, and a first output pipe 507 is connected to the one-way output valve 505. After the first output pipe 507 is thermally connected to the refrigeration component 300, a second output pipe 508 is connected. The second output pipe 508 is connected to the torque detection component 400.

[0068] During the working process, when it is necessary to start the grease conveying component 500 to convey grease or cleaning agent, first place the input pipe 506 in the grease or cleaning agent, and then send a start command through the control component 800, and the third telescopic member 503 will start to reciprocate and extend.

[0069] When the third telescopic member 503 retracts, the piston body 502 slides in the reverse direction, and the pressure inside the conveying cylinder 501 decreases. At this time, the one-way output valve 505 closes to prevent the grease or cleaning agent inside the first output pipe 507 from flowing back, and the one-way input valve 504 opens, and the grease or cleaning agent will enter the conveying cylinder 501 through the input pipe 506.

[0070] When the third telescopic member 503 extends, it pushes the piston body 502 to slide sealingly within the delivery cylinder 501, increasing the pressure within the delivery cylinder 501. Due to the one-way conduction characteristic of the one-way input valve 504, the one-way input valve 504 closes at this time, preventing the grease or cleaner from flowing back into the input pipe 506; while the one-way output valve 505 opens, and the grease or cleaner within the delivery cylinder 501 enters the first output pipe 507 through the one-way output valve 505.

[0071] The grease or cleaner inside the first output pipe 507 forms a heat conduction connection with the refrigeration component 300 through the second heat exchange pipe 308. The grease will be cooled to a suitable low temperature by the refrigeration component 300 after passing through the first output pipe 507. The cooled grease will be transported to the bearing 900 in the torque detection component 400 through the second output pipe 508 for low-temperature torque testing of the grease.

[0072] Please refer to Figures 1 to 7 , in a specific embodiment of the present application, the first telescopic member 406, the second telescopic member 407, and the third telescopic member 503 are all configured as electric push rods. Because the electric push rod can achieve precise control of the telescopic length of the push rod through precise motor control and transmission mechanisms, it can meet the working requirements of some tasks that require high-precision positioning or adjustment. And it can provide a large thrust or pulling force, can push or pull heavy loads, and is suitable for occasions that require a large force to achieve telescopic movements. It has good stability and reliability, operates smoothly, has low noise, can work stably for a long time, and reduces the probability of failures.

[0073] It can be understood that in other embodiments of the present application, the first telescopic member 406, the second telescopic member 407, and the third telescopic member 503 can also be configured as hydraulic cylinders, pneumatic cylinders, or other devices capable of achieving telescopic movements.

[0074] Please refer to Figures 1 to 7 , in an embodiment of the present application, the grease recovery component 600 includes a recovery pipe 601 connected to the torque detection component 400. An electronically controlled opening degree regulating valve 602 is connected to the recovery pipe 601. The electronically controlled opening degree regulating valve 602 is electrically connected to the control component 800. The end of the recovery pipe 601 is detachably connected to a collection box 603.

[0075] During the working process, the grease squeezed out from the bearing 900 inside the torque detection component 400 can be collected inside the collection box 603 through the recovery pipe 601 connected to the torque detection component 400. During the transportation process, the control component 800 sends instructions to the electronically controlled opening degree regulating valve 602 according to a preset program, and can adjust its opening degree.

[0076] Before the test starts, when it is necessary to fill the grease inside the bearing 900, the control component 800 controls the electronically controlled opening degree regulating valve 602 to open to a smaller opening degree or temporarily close completely, so that there is a certain pressure inside the bearing 900, enabling the grease to be more fully filled inside the bearing 900.

[0077] After the test ends, when it is necessary to recover or clean the grease, the control component 800 controls the electronically controlled opening degree regulating valve 602 to open to a larger opening degree or open completely, so that the grease can smoothly flow into the collection box 603 through the recovery pipe 601. At the same time, since the collection box 603 and the recovery pipe 601 are detachably connected, the collection box 603 can be conveniently disassembled or replaced for subsequent treatment of the collected grease.

[0078] Please refer to Figures 1 to 7 , in an embodiment of the present application, the temperature detection component 700 includes a first temperature sensor 701 and a second temperature sensor 702 electrically connected to the control component 800. The first temperature sensor 701 is fixedly and hermetically installed inside the heat insulation box 200, and the second temperature sensor 702 is fixedly and hermetically installed on the recovery pipe 601.

[0079] In some specific embodiments of the present application, the first temperature sensor 701 and the second temperature sensor 702 in the temperature detection component 700 can utilize the characteristics of temperature sensing elements such as thermal resistors and thermocouples to work.

[0080] During the working process, when the temperature changes, physical quantities such as the resistance value or potential difference of the sensing element will change accordingly. The sensor converts these changes in physical quantities into electrical signals and then transmits them to the control component 800. The first temperature sensor 701 is responsible for real-time monitoring of the temperature inside the heat insulation box 200, and the second temperature sensor 702 detects the temperature of the grease in the recovery pipe 601 in real time, so that the temperature data inside and outside the bearing 900 can be detected simultaneously, ensuring accurate and reliable temperature adjustment of the grease during the low-temperature torque test.

[0081] Please refer to Figures 1 to 7 , in an embodiment of the present application, the control component 800 includes a controller 801. A control panel 802 and a display screen 803 are installed on the controller 801. The controller 801 is electrically connected to the control panel 802 and the display screen 803, and the controller 801 is electrically connected to the refrigeration component 300, the torque detection component 400, the grease delivery component 500, the grease recovery component 600, and the temperature detection component 700.

[0082] During the working process, the control component 800 takes the controller 801 as the core, and receives various instructions input by the operator through the control panel 802, such as setting test parameters, starting or stopping the device, controlling the operating states of each component, etc. Meanwhile, the display screen 803 is used to show various information of the system to the operator, including the current temperature, torque data, device operating state, etc., realizing the human-machine interaction function.

[0083] The controller 801 is electrically connected to the refrigeration component 300, the torque detection component 400, the grease delivery component 500, the grease recovery component 600, and the temperature detection component 700. It can send control signals to these components to coordinate their work. For example, it controls the refrigeration power of the refrigeration component 300 according to the set temperature value; controls when the grease delivery component 500 delivers grease and how much the delivery volume is according to the test process; controls the opening degree of the electronically controlled opening and closing valve 602 in the grease recovery component 600, etc. Meanwhile, it also receives feedback signals from these components, such as the temperature data transmitted by the temperature detection component 700, the torque data detected by the torque detection component 400, etc., so as to monitor and adjust the operating state of the entire system in real time.

[0084] Please refer to Figures 1 to 7 , in a specific embodiment of the present application, a pick-and-place opening 104 is provided on the rear cover plate 102 corresponding to the grease recovery component 600. The pick-and-place opening 104 is provided at the position on the rear cover plate 102 corresponding to the grease recovery component 600. When it is necessary to clean, replace or take out the collected grease in the collection box 603 of the grease recovery component 600, the operation can be carried out through the pick-and-place opening 104, without disassembling the entire device, improving the operation convenience.

[0085] Please refer to Figures 1 to 7 , in a specific embodiment of the present application, a mounting seat 105 is fixedly installed on the top of the outer box body 100 corresponding to the control component 800, and the control component 800 is rotatably installed on the mounting seat 105. The operator can rotate the control component 800 according to his own operation habit and viewing angle to make it in a suitable position, facilitating the operation of the control component 800 and viewing the information on the display screen 803.

[0086] The above are all the preferred embodiments of the present application. Without limiting the protection scope of the present application accordingly, therefore: all equivalent changes made according to the structure, shape, and principle of the present application shall be covered within the protection scope of the present application.

Claims

1. A grease low-temperature torque testing device, characterized in that: It includes an outer box body (100), an insulation box (200) is installed inside the outer box body (100), a refrigeration component (300) communicated with the insulation box (200) is installed inside the outer box body (100), a torque detection component (400) is rotatably connected inside the insulation box (200), a bearing (900) for detecting grease is detachably installed on the torque detection component (400), a grease delivery component (500) and a grease recovery component (600) are also connected to the torque detection component (400), the grease delivery component (500) is thermally connected to the refrigeration component (300), a temperature detection component (700) is installed on the insulation box (200) and the grease recovery component (600), and a control component (800) electrically connected to the refrigeration component (300), the torque detection component (400), the grease delivery component (500), the grease recovery component (600) and the temperature detection component (700) is installed on the outer box body (100); the torque detection component (400) includes a driving hollow shaft (401), the driving hollow shaft (401) is rotatably connected to the side wall of the insulation box (200), a bearing outer ring installation sleeve (402) is fixedly installed at one end of the driving hollow shaft (401) facing the inside of the insulation box (200), a driving part (403) electrically connected to the control component (800) is drivingly connected to the outside of one end of the driving hollow shaft (401) facing the outside of the insulation box (200), a driven hollow shaft (404) coaxially arranged with the driving hollow shaft (401) is rotatably connected to the side wall of the insulation box (200), a first mounting disc (405) is rotatably connected to the driven hollow shaft (404), a first telescopic part (406) and a second telescopic part (407) electrically connected to the control component (800) are annularly and evenly installed on the first mounting disc (405), a second mounting disc (408) is installed at the telescopic end of the first telescopic part (406), a bearing inner ring installation shaft (410) is fixedly installed on the second mounting disc (408), the bearing (900) is installed between the bearing inner ring installation shaft (410) and the bearing outer ring installation sleeve (402), and a first torque detector (412) electrically connected to the control component (800) is drivingly connected to the outside of the first mounting disc (405).

2. The low-temperature torque testing device for grease according to claim 1, wherein: A heat insulation door (201) is sealably installed through the side wall of the outer box body (100) at the front end of the insulation box (200), the heat insulation door (201) is rotatably connected to the outer box body (100), and heat insulation layers (202) are attached to the inner wall of the insulation box (200) and one side of the heat insulation door (201) facing the inside of the insulation box (200).

3. The low-temperature torque testing device for grease according to claim 1, wherein: The refrigeration assembly (300) includes a refrigerator (301) electrically connected to the control assembly (800), and a first heat exchange tube (302) is connected to the refrigerator (301); an air inlet (303) and an air outlet (304) arranged side by side up and down are formed at the rear end of the heat insulation box (200), a first heat exchange box (305) is fixedly and sealingly installed on the heat insulation box (200) corresponding to the air outlet (304), a second heat exchange box (306) is fixedly and sealingly installed on the heat insulation box (200) corresponding to the air inlet (303), an axial flow fan (307) electrically connected to the control assembly (800) is installed between the first heat exchange box (305) and the second heat exchange box (306); the first heat exchange tube (302) is installed inside the first heat exchange box (305), a second heat exchange tube (308) is installed inside the second heat exchange box (306), and the second heat exchange tube (308) is connected in series in the grease conveying assembly (500).

4. A grease low-temperature torque testing device according to claim 1, characterized in that: A first gear disc (416) is coaxially and fixedly installed on the outer side of the first mounting disc (405), a mounting plate (417) is fixedly installed inside the heat insulation box (200), a first torque detector (412) is fixedly installed on the mounting plate (417), a first gear (418) is fixedly installed on the first torque detector (412), the first gear (418) meshes with the first gear disc (416), a second gear disc (419) is fixedly installed on the bearing outer ring mounting sleeve (402), a second torque detector (420) electrically connected to the control assembly (800) is fixedly installed on the mounting plate (417) corresponding to the second gear disc (419), a second gear (421) is fixedly installed on the second torque detector (420), and the second gear (421) meshes with the second gear disc (419).

5. The low-temperature torque testing device for grease according to claim 1, wherein: The telescopic end of the second telescopic member (407) slides through the second mounting disc (408) and is provided with a third mounting disc (409). A bearing outer ring mounting cover (411) which is fixedly mounted on the third mounting disc (409) and is hermetically sleeved on the bearing inner ring mounting shaft (410) is provided. The bearing outer ring mounting cover (411) corresponds to the bearing outer ring mounting sleeve (402). A grease delivery channel (413) is provided on the bearing inner ring mounting shaft (410) corresponding to the bearing outer ring mounting cover (411). One end of the bearing inner ring mounting shaft (410) facing the driven hollow shaft (404) is provided with a connecting pipe (414) communicating with the grease delivery channel (413). The connecting pipe (414) is hermetically connected to one end of the driven hollow shaft (404) located inside the heat insulation box (200). One end of the driven hollow shaft (404) located outside the heat insulation box (200) is hermetically and rotatably connected to the grease delivery assembly (500). A grease recovery channel (415) which is hermetically connected to the driving hollow shaft (401) is provided inside the bearing outer ring mounting sleeve (402). One end of the driving hollow shaft (401) located outside the heat insulation box (200) is hermetically and rotatably connected to the grease recovery assembly (600).

6. The low-temperature torque testing device for grease according to claim 1, wherein: The grease delivery assembly (500) includes a delivery cylinder (501). A piston body (502) is hermetically and slidably connected inside the delivery cylinder (501). A third telescopic member (503) which is fixedly connected to the piston body (502) and is electrically connected to the control assembly (800) is provided. A one-way input valve (504) and a one-way output valve (505) are mounted at one end of the delivery cylinder (501) away from the third telescopic member (503). An input pipe (506) is connected to the one-way input valve (504). A first output pipe (507) is connected to the one-way output valve (505). After the first output pipe (507) is thermally connected to the refrigeration assembly (300), a second output pipe (508) is connected. The second output pipe (508) is connected to the driven hollow shaft (404) in the torque detection assembly (400).

7. The low-temperature torque testing device for grease according to claim 1, wherein: The grease recovery assembly (600) includes a recovery pipe (601) connected to the torque detection assembly (400). An electronically controlled opening regulating valve (602) is connected to the recovery pipe (601). The electronically controlled opening regulating valve (602) is electrically connected to the control assembly (800). The end of the recovery pipe (601) is detachably connected to a collection box (603).

8. The low-temperature torque testing device for grease according to claim 7, wherein: The temperature detection assembly (700) includes a first temperature sensor (701) and a second temperature sensor (702) which are electrically connected to the control assembly (800). The first temperature sensor (701) is fixedly and hermetically mounted inside the heat insulation box (200). The second temperature sensor (702) is fixedly and hermetically mounted on the recovery pipe (601).

9. A grease low-temperature torque testing device according to any one of claims 1-8, characterized in that: The control component (800) includes a controller (801), on which a control panel (802) and a display screen (803) are installed. The controller (801) is electrically connected to the control panel (802) and the display screen (803), and the controller (801) is electrically connected to the refrigeration component (300), the torque detection component (400), the grease delivery component (500), the grease recovery component (600), and the temperature detection component (700).

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