Water pump bearing friction torque detection instrument
The water pump shaft bearing friction torque testing instrument, which uses a servo motor and air spindle drive, solves the problem of inaccurate friction torque acquisition in existing technologies, achieving efficient and accurate testing results and meeting diverse testing needs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- C&U CO LTD
- Filing Date
- 2025-05-21
- Publication Date
- 2026-05-01
AI Technical Summary
Existing technologies cannot accurately obtain the friction torque data of the water pump shaft bearing under axial load, making it difficult for the test results to reflect the true performance of the bearing, which affects production efficiency and product delivery.
Employing a servo motor and air spindle drive, combined with a loading cylinder and force sensor, the instrument achieves efficient and accurate friction torque detection. The servo motor provides stable speed and load, while the force sensor monitors and adjusts automatically in real time. The design of the connection module and support structure enhances the instrument's versatility and stability.
To ensure the purity and accuracy of test data, improve test efficiency and precision, meet diverse test needs, reduce mechanical friction and vibration interference, and achieve automation and precision in load application.
Smart Images
Figure CN224189536U_ABST
Abstract
Description
Water pump shaft bearing friction torque testing instrument Technical Field
[0001] This utility model relates to an instrument for detecting the friction torque of a water pump shaft bearing. Background Technology
[0002] In modern industrial production and quality inspection, the performance testing of pump shaft bearings is crucial, directly impacting equipment operating efficiency and lifespan. However, a significant gap exists in routine testing methods for measuring the torque of pump shaft bearings. Current testing techniques cannot accurately obtain frictional torque data under axial loads, making it difficult for test results to fully reflect the bearing's true performance. This lack of testing capability prevents companies from meeting customers' stringent requirements for pump shaft bearing testing, impacting product delivery schedules and production efficiency. Summary of the Invention
[0003] To address the shortcomings of existing technologies, this utility model provides a water pump shaft bearing friction torque testing instrument. It has a simple structure, is closer to actual working conditions, and enables the measurement of torque of the water pump shaft bearing assembly under different loads.
[0004] To achieve the above objectives, this utility model provides a water pump shaft connecting bearing friction torque testing instrument, including a bracket and a servo motor. A loading cylinder is provided on the bracket, and a fixing fixture for fixing the outer ring of the water pump shaft connecting bearing is connected to the output end of the loading cylinder. A positioning fixture for fixing the mandrel of the water pump shaft connecting bearing is rotatably provided on the bracket below the loading cylinder. A torque sensor is connected to the output shaft of the servo motor, and the torque sensor is connected to the positioning fixture through a connecting module. The output shaft of the loading cylinder and the output shaft of the servo motor are coaxially arranged.
[0005] The advantages of this setup are as follows: As a preferred method, an air spindle can be used for power transmission. Ordinary mechanical transmission methods are easily affected by friction and vibration between mechanical components during speed transmission, leading to external additional torque mixing into the test data and interfering with the accuracy of the experimental results. Using an air spindle, the principle of air static pressure is utilized to suspend the rotating parts above an air film, greatly reducing friction and vibration caused by mechanical contact and fundamentally avoiding the generation of additional torque. This ensures that the torque transmitted to the bearing during testing is only the target torque output by the servo motor and the bearing's own frictional torque, guaranteeing the purity and accuracy of the test data. The servo motor, as the power output device, provides stable high-speed operation for testing due to its excellent performance. Compared to traditional motors, servo motors have precise speed control and rapid response characteristics, capable of reaching the preset speed in a short time and maintaining a high degree of speed stability. Whether testing the initial frictional torque of the bearing at low speeds or simulating high-speed conditions, the servo motor can output stably, ensuring the consistency and repeatability of the testing process. The loading system, composed of a loading cylinder and a force sensor, brings high efficiency and accuracy to the testing work. The loading cylinder can quickly and conveniently apply different levels of load to the bearing under test. Compared with traditional mechanical loading methods, its operation is simpler, and the load size and loading speed can be flexibly adjusted through the control system. The force sensor monitors the actual load in real time and compares it with the target load. Once a deviation occurs, the system immediately provides feedback and automatically adjusts the output of the loading cylinder to ensure that the load applied to the bearing always meets the testing requirements, thus achieving automation and precision in the load application process.
[0006] As a further feature of this utility model, the connection module includes a connecting part and a plug-in part. The connecting part has a plug-in groove, and the plug-in part is inserted into the plug-in groove. A mating groove and a mating block are provided between the inner wall of the plug-in groove and the plug-in part, and the mating groove and the mating block are engaged.
[0007] The advantages of this design are as follows: In terms of ease of connection, the plug-in structure allows for direct insertion of the plug into the slot of the connector, eliminating the need for complex tools or cumbersome installation steps, significantly reducing instrument assembly and debugging time. The snap-fit design of the mating groove and mating block automatically positions and locks the connection upon insertion, ensuring a stable connection and effectively preventing loosening due to vibration, thus guaranteeing stable operation during the testing process. Furthermore, the fine-tuning function in the length direction provides a flexible solution for testing bearings of different specifications. In actual testing, the lengths of the water pump shaft and bearing spindle vary, making traditional fixed connection structures incompatible. This connection module, through the relative sliding of the mating groove and mating block, allows for adjustment of the connection length within a certain range. This ensures that the distance between the positioning fixture and the torque sensor is precisely adapted to different bearings, avoiding transmission difficulties or testing errors caused by length mismatches. This enhances the instrument's versatility, meets diverse testing needs, and significantly improves testing efficiency and accuracy.
[0008] As a further feature of this utility model, the servo motor is mounted on the bracket via a motor mount. The motor mount is provided with an adjustment groove along the height direction of the bracket. The bracket is provided with a positioning hole corresponding to the position of the adjustment groove. The adjustment groove is provided with a fastening screw for threaded engagement with the positioning hole.
[0009] The advantages of this design are as follows: The servo motor is mounted on the bracket via a motor mount with an adjustment slot, greatly facilitating the debugging and use of the testing instrument. In actual testing work, different specifications of water pump shaft bearings have varying requirements for the installation space of the testing fixture, and traditional fixed installation methods are difficult to meet diverse needs. In this structure, the adjustment slot, along with the positioning hole and fastening screws, allows the position of the servo motor to be freely adjusted along the height of the bracket according to the actual working conditions. When it is necessary to change to a different size testing fixture, simply loosen the fastening screws, move the motor to the appropriate position within the adjustment slot, then precisely position it through the positioning hole and tighten the screws to secure it. This quickly provides ample operating space for the testing fixture, effectively avoiding installation inconvenience or testing errors caused by space limitations, and significantly improving the flexibility and efficiency of the testing work.
[0010] As a further feature of this utility model, a first support platform is provided on the bracket corresponding to the positioning fixture position, a support arm extends from the first support platform, a second support platform is provided at the other end of the support arm, the loading cylinder is provided on the second support platform, and a support side plate is also provided between the bracket and the first support platform.
[0011] The advantages of this design are as follows: The first support platform, assembled with the positioning fixture, provides a stable load-bearing foundation, ensuring accurate initial positioning during bearing testing. The extended support arm connects to the second support platform, allowing the loading cylinder to be installed in a suspended and rational layout. Compared to the traditional flat design, this significantly saves lateral space, making the overall structure more compact and effectively reducing the instrument's footprint, facilitating flexible placement in limited laboratory or workshop environments. The addition of the support side plate further enhances structural stability. It tightly connects the bracket to the first support platform, constructing a robust triangular support system in the vertical direction, enhancing the overall structure's resistance to deformation. When the loading cylinder applies a load, it effectively disperses pressure, reducing swaying or displacement caused by uneven force, ensuring a smooth testing process. Whether used for extended periods at high frequencies or handling high-intensity testing tasks, this stable structural design maintains excellent usability. Attached Figure Description
[0012] Figure 1 is a schematic diagram of the overall structure of an embodiment of the present utility model;
[0013] Figure 2 is an exploded view of the connection module in an embodiment of this utility model. Detailed Implementation
[0014] This utility model provides an embodiment of a water pump shaft bearing friction torque testing instrument, as shown in Figures 1 and 2. It includes a support 1 and a servo motor 6. A loading cylinder 2 is mounted on the support 1. The output end of the loading cylinder 2 is connected to a fixing fixture 21 for fixing the outer ring of the water pump shaft bearing. A positioning fixture 3 for fixing the water pump shaft bearing spindle is rotatably mounted on the support 1 below the loading cylinder 2. A torque sensor 5 is connected to the output shaft of the servo motor 6. The torque sensor 5 is connected to the positioning fixture 3 via a connecting module 4. The output shaft of the loading cylinder 2 and the output shaft of the servo motor 6 are coaxial. The advantages of this configuration are: preferably, an air spindle can be used for power transmission. Ordinary mechanical transmission methods are easily affected by friction and vibration between mechanical parts during speed transmission, leading to external additional torque mixing into the test data and interfering with the accuracy of the experimental results. Using an air spindle utilizes the principle of air static pressure to suspend the rotating parts above an air film, greatly reducing friction and vibration caused by mechanical contact and fundamentally avoiding the generation of additional torque. This ensures that during the testing process, the torque transmitted to the bearing is only the target torque output by the servo motor 6 and the bearing's own frictional torque, guaranteeing the purity and accuracy of the test data. As a power output device, the servo motor 6 provides stable high-speed operation for the testing work thanks to its excellent performance. Compared to traditional motors, the servo motor 6 has precise speed control and rapid response characteristics, enabling it to reach the preset speed in a short time and maintain a high degree of speed stability. Whether testing the initial frictional torque of the bearing at low speeds or simulating high-speed operating conditions, the servo motor 6 can output stably, ensuring the consistency and repeatability of the testing process. The loading system consists of the loading cylinder 2 and a force sensor, bringing high efficiency and accuracy to the testing work. The loading cylinder 2 can quickly and conveniently apply different levels of load to the bearing under test. Compared to traditional mechanical loading methods, its operation is simpler, and the load size and loading speed can be flexibly adjusted through the control system. The force sensor monitors the actual load in real time and compares it with the target load. Once a deviation occurs, the system immediately provides feedback and automatically adjusts the output of the loading cylinder 2, ensuring that the load applied to the bearing always meets the testing requirements, achieving automation and precision in the load application process.
[0015] As a further feature of this embodiment, the connection module 4 includes a connecting part 41 and a plug-in part 42. The connecting part 41 has a plug-in groove 411, and the plug-in part 42 is inserted into the plug-in groove 411. A mating groove 412 and a mating block 421 are provided between the inner wall of the plug-in groove 411 and the plug-in part 42, and the mating groove 412 and the mating block 421 are snap-fitted together. The advantages of this design are: In terms of connection convenience, the plug-in structure allows the plug-in part 42 to be directly inserted into the plug-in groove 411 of the connecting part 41 to complete the connection, eliminating the need for complex tools or cumbersome installation steps, significantly shortening the instrument assembly and debugging time. The snap-fit design of the mating groove 412 and the mating block 421 automatically positions and locks the connection upon insertion, ensuring a stable connection and effectively preventing loosening due to vibration, thus guaranteeing stable operation during the testing process. Furthermore, the fine-tuning function in the length direction provides a flexible solution for testing bearings of different specifications. In actual testing, the lengths of the bearing mandrels connecting the water pump shaft vary, making traditional fixed connection structures difficult to integrate. This connection module 4, through the relative sliding of the mating groove 412 and the mating block 421, can adjust the connection length within a certain range. This allows the distance between the positioning fixture 3 and the torque sensor 5 to precisely match different bearings, avoiding transmission difficulties or testing errors caused by length mismatches. This enhances the instrument's versatility, meets diverse testing needs, and significantly improves testing efficiency and accuracy.
[0016] As a further feature of this embodiment, the servo motor 6 is mounted on the bracket 1 via a motor mount 61. An adjustment groove 62 is provided on the motor mount 61 along the height direction of the bracket 1. A positioning hole is provided on the bracket 1 corresponding to the adjustment groove 62. A fastening screw for threaded engagement with the positioning hole is provided on the adjustment groove 62. The advantage of this configuration is that the servo motor 6 is mounted on the bracket 1 via the motor mount 61 with the adjustment groove 62, greatly facilitating the debugging and use of the testing instrument. In actual testing work, different specifications of water pump shaft bearings have varying requirements for the installation space of the testing fixture, and traditional fixed installation methods are difficult to meet diverse needs. In this structure, the adjustment groove 62, in conjunction with the positioning hole and fastening screw, allows the position of the servo motor 6 to be freely adjusted along the height direction of the bracket 1 according to the actual working conditions. When it is necessary to change to test fixtures of different sizes, simply loosen the fastening screws, move the motor to the appropriate position within the adjustment slot 62, and then accurately position and tighten the screws through the positioning holes. This quickly provides sufficient operating space for the test fixtures, effectively avoiding installation inconvenience or testing errors caused by space limitations, and significantly improving the flexibility and efficiency of testing work.
[0017] As a further feature of this embodiment, a first support platform 11 is provided on the bracket 1 corresponding to the position of the positioning fixture 3. A support arm 12 extends from the first support platform 11, and a second support platform 13 is provided at the other end of the support arm 12. The loading cylinder 2 is mounted on the second support platform 13, and a support side plate is also provided between the bracket 1 and the first support platform 11. The beneficial effects of this configuration are: with this configuration, the first support platform 11 is assembled with the positioning fixture 3, providing it with a stable load-bearing foundation and ensuring accurate initial positioning during bearing testing; the extended support arm 12 connects to the second support platform 13, allowing the loading cylinder 2 to be installed in a suspended and reasonable layout. Compared with the traditional flat design, this greatly saves lateral space, making the overall structure more compact and effectively reducing the instrument's footprint, facilitating flexible arrangement in limited laboratory or workshop environments. The addition of the support side plate further enhances structural stability. It tightly connects the bracket 1 and the first support platform 11, constructing a robust triangular support system in the vertical direction, enhancing the overall structure's resistance to deformation. When the loading cylinder 2 applies a load, it can effectively distribute the pressure, reduce shaking or displacement caused by uneven force, and ensure a smooth testing process. Whether used for long-term high-frequency applications or to handle high-intensity testing tasks, this stable structural design can always maintain good usability.
[0018] The above examples are merely one preferred embodiment of this utility model. Ordinary variations and substitutions made by those skilled in the art within the scope of this utility model's technical solution are all included within the protection scope of this utility model.
Claims
1. An instrument for detecting the friction torque of a water pump shaft bearing, characterized in that: The device includes a bracket and a servo motor. A loading cylinder is mounted on the bracket, and the output end of the loading cylinder is connected to a fixing fixture for fixing the outer ring of the water pump shaft connecting bearing. A positioning fixture for fixing the mandrel of the water pump shaft connecting bearing is rotatably mounted on the bracket below the loading cylinder. A torque sensor is connected to the output shaft of the servo motor, and the torque sensor is connected to the positioning fixture via a connecting module. The output shaft of the loading cylinder and the output shaft of the servo motor are coaxially arranged.
2. The water pump shaft bearing friction torque testing instrument according to claim 1, characterized in that: The connection module includes a connecting part and a plug-in part. The connecting part has a plug-in groove, and the plug-in part is inserted into the plug-in groove. A mating groove and a mating block are provided between the inner wall of the plug-in groove and the plug-in part. The mating groove and the mating block are engaged.
3. The water pump shaft bearing friction torque testing instrument according to claim 1, characterized in that: The servo motor is mounted on the bracket via a motor mount. The motor mount has an adjustment groove along the height of the bracket. The bracket has a positioning hole corresponding to the position of the adjustment groove. The adjustment groove is provided with a fastening screw for threaded engagement with the positioning hole.
4. The water pump shaft bearing friction torque testing instrument according to claim 1, characterized in that: A first support platform is provided on the bracket at the corresponding positioning fixture position. A support arm extends from the first support platform. A second support platform is provided at the other end of the support arm. The loading cylinder is provided on the second support platform. A support side plate is also provided between the bracket and the first support platform.