Testing system for rotary hydraulic motor assembly with speed reducer

Abstract

The invention relates to the technical field of hydraulic motor testing, in particular to a testing system for a rotary hydraulic motor assembly with a speed reducer, which comprises a testing chassis, a testing loading device, a testing shaft seat device and a fixing seat device, and is characterized in that the testing loading device, the testing shaft seat device and the fixing seat device are all mounted on the testing chassis; and the test shaft seat device is positioned below the fixed seat device. Through the arrangement of the test shaft seat device and the fixed seat device, the large-scale rotary hydraulic motor assembly with the speed reducer can be tested in a vertical installation position, and the actual working state is accurately simulated; besides, ultra-large loading torque and accurate loading control are provided for testing through combination of the servo motor, the first speed change gear box and the second speed change gear box, the application range of the loading device is expanded, and the loading device can be suitable for loading testing of a large rotary hydraulic motor assembly with a speed reducer and can also be used for testing of the rotary hydraulic motor assembly with a speed reducer. And the test technical requirements of more torque and rotating speed combinations can be met.

Description

Technical Field

[0001] This invention relates to the technical field of hydraulic motor testing, and more specifically, to a testing system for a rotary hydraulic motor assembly with a speed reducer. Background Technology

[0002] The large rotary hydraulic motor assembly with a speed reducer is a combination of a rotary hydraulic motor and a speed reducer. It is a core component of the hydraulic transmission system, and its performance and reliability directly affect the operating quality of the entire equipment. In the factory testing phase, accurately simulating actual load conditions and meeting the loading test requirements of this ultra-large assembly are key requirements.

[0003] Currently, most common hydraulic motor test benches are designed for performance testing of individual hydraulic motors. Limited by loading capacity and structural design, they struggle to provide comprehensive performance evaluation of hydraulic motor assemblies with integrated reducers. While a few test devices possess assembly testing capabilities, their loading methods cannot accurately simulate actual load conditions, nor can they adapt to the loading requirements of different torque and speed combinations. In particular, they cannot meet the testing requirements of large rotary hydraulic motor assemblies with reducers, significantly impacting the accuracy and applicability of factory testing. Summary of the Invention

[0004] The purpose of this invention is to overcome the problem that existing test benches cannot meet the testing requirements of large rotary hydraulic motor assemblies with reducers, and to provide a testing system for rotary hydraulic motor assemblies with reducers. This system can not only accurately simulate actual load conditions and meet the testing requirements of large rotary hydraulic motor assemblies with reducers, but also adapt to loading technology requirements of different torque and speed combinations.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows: A testing system for a rotary hydraulic motor assembly with a speed reducer is provided, comprising a test chassis, a test loading device, a test shaft support device, and a mounting bracket for fixing the rotary hydraulic motor assembly with a speed reducer. The test loading device, the test shaft support device, and the mounting bracket are all mounted on the test chassis, with the test shaft support device located below the mounting bracket. The test loading device includes a servo motor, a second gearbox, and a first gearbox connected in sequence. The first gearbox is connected to the output shaft of the rotary hydraulic motor assembly with a speed reducer. The output shaft of the servo motor is horizontally positioned, while the output shaft of the rotary hydraulic motor assembly with a speed reducer is vertically positioned. The output speed of the rotary hydraulic motor assembly with a speed reducer is controlled by the first gearbox. The output torque of the gearbox increases according to a first speed ratio multiple, and the output speed decreases according to a first speed ratio multiple via the first gearbox. The output speed increases according to a second speed ratio multiple via the second gearbox, and the output torque decreases according to a second speed ratio multiple via the second gearbox. The test shaft support device includes a first fixed frame, a vertical coupling, a transmission gear sleeve assembly, a torque sensor, and a speed sensor. The first fixed frame is fixedly installed on the test chassis. The vertical coupling is connected to the first gearbox. The transmission gear sleeve assembly is used to connect the output shaft of the rotary hydraulic motor assembly with a reducer, and the transmission gear sleeve assembly is rotatably connected to the first fixed frame. The torque sensor is connected between the vertical coupling and the transmission gear sleeve assembly, and the speed sensor is installed on the transmission gear sleeve assembly.

[0006] The present invention provides a testing system for a rotary hydraulic motor assembly with a speed reducer. A fixed base device is used to vertically support and fix the large rotary hydraulic motor assembly with a speed reducer under test. A test loading device is set up to apply a counter-torsional load to the rotary hydraulic motor assembly with a speed reducer. A test shaft seat device connects the rotary hydraulic motor assembly with a speed reducer and the test loading device to test the torque and speed.

[0007] Using a combination of a first gearbox and a second gearbox as the test loading device, the output speed of the rotary hydraulic motor assembly with a reducer is increased by a first gear ratio multiple and the output torque is decreased by a first gear ratio multiple. The output speed is increased by a second gear ratio multiple and the output torque is decreased by a second gear ratio multiple. This converts the low speed (10-80 rpm) and high torque (10000-80000 Nm) output of the rotary hydraulic motor assembly with a reducer into high speed (400-3000 rpm) and low torque (200-2000 Nm) to adapt to the working conditions of the loading servo motor. The servo motor outputs a loading torque in the opposite direction to the output torque of the rotary hydraulic motor assembly with a reducer under test. This torque is then passed through the second gearbox and the first gearbox to form a counter-torque loading.

[0008] This invention, through the configuration of the test shaft seat device and the fixed seat device, allows large rotary hydraulic motor assemblies with reducers to be tested in a vertically mounted position. This installation direction is consistent with the installation direction of the large rotary hydraulic motor assembly with reducers, which can accurately simulate the actual working state and effectively improve the accuracy of factory testing. In addition, this invention provides ultra-large loading torque and precise loading control for testing through the combination of servo motor, first gearbox and second gearbox, expanding the applicability of the loading device. It can not only be used for loading testing of large rotary hydraulic motor assemblies with reducers, but also meet the testing technical requirements of more torque and speed combinations.

[0009] Furthermore, the output shaft of the servo motor is connected to a drive shaft via a first coupling, the drive shaft is connected to a second gearbox via a second coupling, and the second gearbox is connected to the first gearbox via a third coupling. A bearing housing is fixedly mounted on the test chassis, and the drive shaft passes through and is rotatably connected to the bearing housing. The arrangement of the first, second, and third couplings helps to achieve stable torque transmission.

[0010] Furthermore, the transmission gear sleeve assembly includes a transmission gear sleeve and a vertical rotating shaft fixedly connected. The transmission gear sleeve is used to connect to the output shaft of a rotary hydraulic motor assembly with a speed reducer. The vertical rotating shaft is rotatably mounted on the first fixed frame, and a bearing is provided between the vertical rotating shaft and the first fixed frame. The first fixed frame is connected to a bearing end cap located at the end of the bearing. Using the transmission gear sleeve and vertical rotating shaft as the transmission gear sleeve assembly, the diameter of the transmission gear sleeve is larger than the diameter of the vertical rotating shaft, and the vertical rotating shaft passes through the first fixed frame and connects to the torque sensor.

[0011] Furthermore, the torque sensor is fixedly connected to the vertical shaft via a coupling sleeve, and the speed sensor is fixedly mounted on the outer periphery of the coupling sleeve. The coupling sleeve simplifies the connection between the torque sensor and the vertical shaft and improves the connection stability between them. The torque sensor is used to detect the torque applied under torsional load.

[0012] Furthermore, the mounting bracket includes a second mounting frame, a mounting plate, and a key block. The rotary hydraulic motor assembly with a speed reducer is fixed to the mounting plate, and the mounting plate is fixedly mounted to the second mounting frame via the key block. During the load test of the large rotary hydraulic motor assembly with a speed reducer, the torque generated by its housing is transmitted to the test chassis via the key block to keep the housing of the large rotary hydraulic motor assembly with a speed reducer fixed and non-rotating.

[0013] Furthermore, both the second and first fixing frames are isosceles trapezoidal in shape, with their central axes collinear, and the first fixing frame located inside the second fixing frame. The arrangement of the first and second fixing frames separates and isolates the loading area and the testing area, which helps improve the accuracy of the test.

[0014] Furthermore, it also includes a brake disc and a braking device. The brake disc is located on the outer periphery of the drive shaft, and the braking device includes a friction block and a driving component. The driving component drives the friction block to move closer to or away from the brake disc, and the friction block is connected to the output end of the driving component. The brake disc and braking device work together to quickly and conveniently simulate the braking and starting conditions of a large rotary hydraulic motor assembly with a speed reducer and perform performance testing, further improving the accuracy of factory testing.

[0015] Furthermore, it also includes a caliper assembly and a sliding support fixedly mounted on the test chassis. The brake disc and friction block are both located inside the caliper assembly. The drive component is fixed to the side wall of the caliper assembly. The caliper assembly is slidably connected to the sliding support, and a resetter is connected between the caliper assembly and the sliding support. The sliding support allows the two ends of the brake disc to be clamped during braking, thereby improving braking stability.

[0016] Furthermore, it also includes a first circulating lubrication and cooling device for lubricating the first gearbox and a second circulating lubrication and cooling device for lubricating the second gearbox. Both the first and second circulating lubrication and cooling devices are mounted on the test chassis. The first circulating lubrication and cooling device is used for lubricating the first gearbox, and the second circulating lubrication and cooling device is used for lubricating the second gearbox, which can ensure the working stability of the first and second gearboxes and extend their service life.

[0017] Furthermore, both the first and second circulating lubrication and cooling devices include a lubrication pump and a circulation pipeline connecting the lubrication pump to the first or second gearbox. The circulation pipeline is equipped with a filter, a radiator assembly, a temperature sensor, and a pressure gauge. The filter is used to filter the lubricating oil, the radiator assembly is used to cool the lubricating oil, and the temperature sensor and pressure gauge are used to detect temperature and pressure. The filtered and cooled lubricating oil then re-enters the gearbox for lubrication, achieving the recycling of lubricating oil, which is energy-saving and environmentally friendly.

[0018] Compared with the prior art, the beneficial effects of the present invention are: The testing system for the rotary hydraulic motor assembly with a speed reducer of the present invention, through the setting of the test shaft seat device and the fixed seat device, enables the large rotary hydraulic motor assembly with a speed reducer to be tested in a vertically installed position. This installation direction is consistent with the installation direction of the large rotary hydraulic motor assembly with a speed reducer, which can accurately simulate the actual working state and effectively improve the accuracy of factory testing.

[0019] The testing system for a rotary hydraulic motor assembly with a speed reducer of the present invention provides ultra-large loading torque and precise loading control for testing through the combination of a servo motor, a first gearbox, and a second gearbox. This expands the applicability of the loading device, making it suitable not only for loading tests of large rotary hydraulic motor assemblies with speed reducers, but also for testing technical requirements of more torque and speed combinations.

[0020] The test system for the rotary hydraulic motor assembly with a speed reducer of the present invention, in conjunction with the brake disc and brake device, can quickly and conveniently simulate the braking and starting conditions of a large rotary hydraulic motor assembly with a speed reducer and conduct performance tests, further improving the accuracy of factory testing. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of a test system for a rotary hydraulic motor assembly with a speed reducer; Figure 2 This is a schematic diagram of the test loading device; Figure 3 This is a schematic diagram of the test bearing assembly; Figure 4 This is a schematic diagram of the fixed base device; Figure 5 This is a schematic diagram of the braking device. Figure 6 This is a schematic diagram of the structure of the first circulating lubrication and cooling device; In the attached diagram: 100, Test chassis; 200, Test loading device; 210, Servo motor; 220, Second gearbox; 230, First gearbox; 240, First coupling; 250, Drive shaft; 260, Second coupling; 270, Third coupling; 280, Brake disc; 290, Bearing housing; 300, Test shaft seat assembly; 310, First fixed frame; 320, Vertical coupling; 330, Transmission gear sleeve assembly; 331, Transmission gear sleeve; 332, Vertical rotating shaft; 340, Torque sensor; 350, Speed ​​sensor; 360, Bearing; 370, Bearing end cover; 380, Coupling sleeve; 400, Fixed base. Device; 410, Second fixing bracket; 420, Mounting plate; 430, Square key; 500, Braking device; 510, Friction block; 520, Drive component; 530, Jaw assembly; 531, Slider; 540, Sliding support; 541, Slide rod; 550, Resetter; 560, Limiting component; 570, Position pointer; 580, Position sensor; 600, First circulating lubrication and cooling device; 610, Lubrication pump; 620, Circulation pipeline; 630, Filter; 640, Radiator assembly; 650, Temperature sensor; 660, Pressure gauge; 700, Second circulating lubrication and cooling device; 800, Rotary hydraulic motor assembly with reducer. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0023] The present invention will be further described below with reference to specific embodiments. The accompanying drawings are for illustrative purposes only, representing schematic diagrams rather than actual physical objects, and should not be construed as limiting the scope of this patent. To better illustrate the embodiments of the present invention, some components in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings.

[0024] In the accompanying drawings of the embodiments of the present invention, the same or similar reference numerals correspond to the same or similar components. In the description of the present invention, it should be understood that if terms such as "upper," "lower," "left," "right," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting the present patent. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0025] Example 1 This embodiment is a first embodiment of a test system for a rotary hydraulic motor assembly 800 with a speed reducer. It includes a test chassis 100, a test loading device 200, a test shaft support device 300, and a mounting bracket 400 for fixing the rotary hydraulic motor assembly 800 with a speed reducer. The test loading device 200, the test shaft support device 300, and the mounting bracket 400 are all mounted on the test chassis 100. The test shaft support device 300 is located below the mounting bracket 400. Figure 1 As shown. In this embodiment, the fixed base device 400 is used to vertically support and fix the large rotary hydraulic motor assembly 800 with a reducer under test; the test loading device 200 is set to form a counter-torsional load on the rotary hydraulic motor assembly 800 with a reducer; the test shaft seat device 300 connects the rotary hydraulic motor assembly 800 with a reducer and the test loading device 200 to test the torque and speed of the output shaft of the large rotary hydraulic motor assembly 800 with a reducer under test.

[0026] The test loading device 200 includes a servo motor 210, a second gearbox 220, and a first gearbox 230 connected in sequence. The first gearbox 230 is connected to the output shaft of a rotary hydraulic motor assembly 800 with a reducer. The output shaft of the servo motor 210 is horizontally positioned, while the output shaft of the rotary hydraulic motor assembly 800 with a reducer is vertically positioned. The output speed of the rotary hydraulic motor assembly 800 is increased by a first speed ratio multiple through the first gearbox 230, and the output torque is decreased by a first speed ratio multiple through the first gearbox 230. Similarly, the output speed is increased by a second speed ratio multiple through the second gearbox 220, and the output torque is decreased by a second speed ratio multiple through the second gearbox 220. Figure 2 As shown.

[0027] Specifically, in this embodiment, the second gearbox 220 is a high-speed gearbox, and the first gearbox 230 is a high-ratio gearbox. In addition to changing the transmission speed and torque, the first gearbox 230 also changes the transmission direction output by the servo motor 210 from the horizontal direction to the vertical upward direction, thereby realizing that the rotary hydraulic motor assembly 800 with reducer is vertically mounted on the fixed base device 400. The output shaft of the servo motor 210 is connected to the transmission shaft 250 through the first coupling 240. The transmission shaft 250 is connected to the second gearbox 220 through the second coupling 260. The second gearbox 220 is connected to the first gearbox 230 through the third coupling 270. A bearing seat 290 is fixedly installed on the test chassis 100. The transmission shaft 250 passes through the bearing seat 290 and is rotatably connected to the bearing seat 290. The arrangement of the first coupling 240, the second coupling 260 and the third coupling 270 helps to achieve stable torque transmission and prevents the drive shaft 250 from deviating during transmission.

[0028] In this embodiment, the first gearbox 230 and the second gearbox 220 are combined as the test loading device 200. The output speed of the rotary hydraulic motor assembly 800 with a reducer is increased by a first gear ratio multiple through the first gearbox 230, and the output torque is decreased by a first gear ratio multiple through the first gearbox 230. Then, the output speed is increased by a second gear ratio multiple through the second gearbox 220, and the output torque is decreased by a second gear ratio multiple through the second gearbox 220, thereby loading the rotary hydraulic motor assembly 800 with a reducer... The low speed (10-80 rpm) and high torque (10000-80000 Nm) output of the hydraulic motor assembly 800 are converted into high speed (400-3000 rpm) and low torque (200-2000 Nm) to adapt to the working conditions of the loading servo motor 210. The servo motor 210 outputs a loading torque that is opposite in direction to the output torque of the rotary hydraulic motor assembly 800 with a reducer under test. This torque is then passed through the second gearbox 220 and the first gearbox 230 to form a counter-torque loading.

[0029] In addition, in this embodiment, the test shaft support device 300 includes a first fixed frame 310, a vertical coupling 320, a transmission gear sleeve assembly 330, a torque sensor 340, and a speed sensor 350. The first fixed frame 310 is fixedly installed on the test chassis 100. The vertical coupling 320 is connected to the first gearbox 230. The transmission gear sleeve assembly 330 is used to connect the output shaft of the rotary hydraulic motor assembly 800 with a reducer, and the transmission gear sleeve assembly 330 is rotatably connected to the first fixed frame 310. The torque sensor 340 is connected between the vertical coupling 320 and the transmission gear sleeve assembly 330. The speed sensor 350 is installed on the transmission gear sleeve assembly 330. Figure 3As shown. In this embodiment, the torque sensor 340 is specifically a disc-type torque sensor 340.

[0030] Specifically, the transmission gear sleeve assembly 330 includes a transmission gear sleeve 331 and a vertical rotating shaft 332 fixedly connected. The transmission gear sleeve 331 is used to connect the output shaft of the rotary hydraulic motor assembly 800 with a reducer. The vertical rotating shaft 332 is rotatably mounted on a first fixed frame 310. A bearing 360 is provided between the vertical rotating shaft 332 and the first fixed frame 310. The first fixed frame 310 is connected to a bearing end cap 370 located at the end of the bearing 360. Specifically, the bearing 360 can be a double-row tapered roller bearing 360. The transmission gear sleeve 331 is fixed to the vertical rotating shaft 332 and fixed together by a flat key. The torque sensor 340 is fixedly connected to the vertical rotating shaft 332 through a coupling sleeve 380, and the speed sensor 350 is fixedly mounted on the outer periphery of the coupling sleeve 380. Figure 3 As shown. In this embodiment, a transmission gear sleeve 331 and a vertical rotating shaft 332 are used as the transmission gear sleeve assembly 330. The diameter of the transmission gear sleeve 331 is larger than the diameter of the vertical rotating shaft 332. The vertical rotating shaft 332 passes through the first fixing frame 310 and is connected to the torque sensor 340. The coupling sleeve 380 simplifies the connection between the torque sensor 340 and the vertical rotating shaft 332 and improves the connection stability between the torque sensor 340 and the vertical rotating shaft 332. The torque sensor 340 is used to detect the torque applied under torsion.

[0031] The mounting bracket 400 includes a second mounting frame 410, a mounting plate 420, and a key block 430. A rotary hydraulic motor assembly 800 with a reducer is fixed to the mounting plate 420, and the mounting plate 420 is fixedly mounted to the second mounting frame 410 via the key block 430. Figure 4 As shown. In this embodiment, there are two square keys 430, which are arranged symmetrically. During the implementation of this embodiment, when the large rotary hydraulic motor assembly 800 with a reducer is under test, the torque generated by its housing is transmitted to the test chassis 100 through the square keys 430 to keep the housing of the large rotary hydraulic motor assembly 800 with a reducer fixed and not rotated.

[0032] In this embodiment, both the second fixing frame 410 and the first fixing frame 310 are in the shape of an isosceles trapezoid. The central axes of the first fixing frame 310 and the second fixing frame 410 are collinear, and the first fixing frame 310 is located inside the second fixing frame 410. The isosceles trapezoidal shape of the first fixing frame 310 and the second fixing frame 410 provides sufficient installation space and stable support. The arrangement of the first fixing frame 310 and the second fixing frame 410 separates and isolates the loading area and the testing area, which helps to improve the accuracy of the test.

[0033] In this embodiment, when installing the large rotary hydraulic motor assembly 800 with a speed reducer under test, the assembly is inserted into the inner hole of the mounting plate 420, aligning the flange of the assembly with the connecting holes on the mounting plate 420. The assembly is then moved until the flange of the assembly abuts against the mounting plate 420. At this point, the output shaft of the assembly is engaged with the transmission gear sleeve 331, and the connecting holes on the flange and mounting plate 420 are aligned. The flange and mounting plate 420 are then locked together using connectors to complete the fixed installation and test preparation of the large rotary hydraulic motor with a speed reducer under test. Due to the simplicity of the loading process, in actual testing, a robotic arm can be used to load and unload the large rotary hydraulic motor with a speed reducer under test.

[0034] Example 2 This embodiment is a second embodiment of a test system for a rotary hydraulic motor assembly 800 with a speed reducer. This embodiment is similar to the first embodiment, except that it also includes a brake disc 280 and a brake device 500. The brake disc 280 and the brake device 500 work together to quickly and conveniently simulate the braking and starting conditions of a large rotary hydraulic motor assembly 800 with a speed reducer and perform performance tests, further improving the accuracy of factory testing.

[0035] In this embodiment, the brake disc 280 is fixedly mounted on the outer periphery of the drive shaft 250. The braking device 500 includes a friction block 510 and a driving member 520. The driving member 520 drives the friction block 510 to move closer to or away from the brake disc 280. The friction block 510 is connected to the output end of the driving member 520. Specifically, the driving member 520 is a telescopic hydraulic cylinder. Figure 5 As shown. In this embodiment, the brake disc 280 and the brake device 500 work together to quickly and conveniently simulate the braking and starting conditions of a large rotary hydraulic motor assembly 800 with a reducer and perform performance tests, further improving the accuracy of factory testing.

[0036] To improve braking stability, the braking device 500 in this embodiment also includes a caliper assembly 530 and a sliding support 540 fixedly installed on the test chassis 100. The brake disc 280 and the friction block 510 are both located inside the caliper assembly 530. The drive member 520 is fixed to the side wall of the caliper assembly 530. The caliper assembly 530 is slidably connected to the sliding support 540. A resetter 550 is connected between the caliper assembly 530 and the sliding support 540.

[0037] Specifically, in this embodiment, as Figure 5As shown, the jaw assembly 530 is connected to two sliders 531, and the sliding support 540 is provided with two parallel sliding rods 541. The sliders 531 and the sliding rods 541 are slidably connected. Since there are two sets of sliders 531 and sliding rods 541, the jaw assembly 530 can only move back and forth relative to the sliding support 540 without rotating, thereby effectively transmitting the braking torque to the sliding support 540. The sliding support 540 is fixed to the test chassis 100, and the test chassis 100 counteracts the braking torque to ensure that the brake disc 280 does not rotate during the test, thus ensuring accurate test results. A friction surface is provided on one inner wall of the jaw assembly 530. The friction surface and the friction block 510 are located on both sides of the brake disc 280. In this embodiment, the drive member 520 drives the friction block 510 to move until the friction block 510 abuts against one end face of the brake disc 280. Then, the drive member 520 continues to extend, which will cause the jaw assembly 530 to slide relative to the sliding support 540 until the other end face of the brake disc 280 contacts the friction surface, thereby clamping the brake disc 280 between the friction block 510 and the friction surface. When the drive member 520 retracts and causes the friction block 510 to retract, the resetter 550 drives the jaw assembly 530 to return to its initial position.

[0038] To limit the movement of the jaw assembly 530, the braking device 500 in this embodiment also includes a limiting member 560. Specifically, only one set of limiting members 560 is required. The limiting members 560 are fixedly mounted on the sliding support 540, and the limiting members 560 and the driving member 520 are located on both sides of the jaw assembly 530, respectively. During the sliding process of the jaw assembly 530, the sliding stroke in one direction is limited by the limiting member 560, and the sliding stroke in the other direction is limited by the extension and retraction stroke of the driving member 520.

[0039] To visually indicate the braking status and brake release status, the braking device 500 in this embodiment also includes a position pointer 570 and a position sensor 580, such as... Figure 5 As shown. Specifically, the position pointer 570 is located on top of the friction block 510, and the position sensor 580 is fixedly mounted on the caliper assembly 530. When the position pointer 570 approaches the position sensor 580, the position sensor 580 sends a signal to notify the control system that it is currently in a braking state and can proceed to the next test action: starting the large rotary hydraulic motor assembly 800 with a reducer; after the braking performance and starting performance test are completed, the piston rod of the drive cylinder retracts to retract the friction block 510, causing it to disengage from the brake disc 280; at the same time, the resetter 550 pushes the brake caliper jaws to move in the opposite direction, eventually causing the brake caliper jaws to disengage from the brake disc 280 and return to the initial position; simultaneously, the position pointer 570 moves away from the position sensor 580, and the position sensor 580 sends a signal to notify the control system that it is currently in a released braking state and can proceed to the next test action.

[0040] Example 3 This embodiment is the third embodiment of a test system for a rotary hydraulic motor assembly 800 with a speed reducer. This embodiment is similar to the first or second embodiment, except that this embodiment also includes a first circulating lubrication cooling device 600 for lubricating the first gearbox 230 and a second circulating lubrication cooling device 700 for lubricating the second gearbox 220. Both the first circulating lubrication cooling device 600 and the second circulating lubrication cooling device 700 are mounted on the test chassis 100.

[0041] Specifically, in this embodiment, both the first circulating lubrication and cooling device 600 and the second circulating lubrication and cooling device 700 include a lubrication pump 610 and a circulation pipeline 620 connecting the lubrication pump 610 and the first transmission gearbox 230 or the second transmission gearbox 220. The circulation pipeline 620 is equipped with a filter 630, a radiator assembly 640, a temperature sensor 650, and a pressure gauge 660. Figure 6 As shown. Filter 630 is used to filter the lubricating oil, radiator assembly 640 is used to cool the lubricating oil, temperature sensor 650 and pressure gauge 660 are used to detect temperature and pressure. The filtered and cooled oil then enters the transmission gearbox for lubrication, realizing the recycling of lubricating oil, which is energy-saving and environmentally friendly.

[0042] In this embodiment, the first circulating lubrication and cooling device 600 is used for lubrication of the first gearbox 230, and the second circulating lubrication and cooling device 700 is used for lubrication of the second circulating lubrication and cooling device 700. This can ensure the working stability of the first gearbox 230 and the second gearbox 220 and extend their service life.

[0043] In the specific implementation of the above embodiments, the technical features can be combined in any non-contradictory way. For the sake of brevity, not all possible combinations of the above technical features are described. However, as long as the combination of these technical features is not contradictory, it should be considered to be within the scope of this specification.

[0044] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A test system for a rotary hydraulic motor assembly with a belt reduction, characterized by, The test chassis (100), the test loading device (200), the test shaft seat device (300) and the fixing seat device (400) for fixing and installing the rotary hydraulic motor assembly (800) with a belt reducer are provided: The test loading device (200), the test shaft seat device (300) and the fixing seat device (400) are all installed on the test chassis (100), and the test shaft seat device (300) is located below the fixing seat device (400): The test loading device (200) comprises a servo motor (210), a second speed change gearbox (220) and a first speed change gearbox (230) connected in sequence, the first speed change gearbox (230) is connected with an output shaft of the rotary hydraulic motor assembly (800) with a belt reducer, the output shaft of the servo motor (210) is horizontally arranged, and the output shaft of the rotary hydraulic motor assembly (800) with a belt reducer is vertically arranged; the output speed of the rotary hydraulic motor assembly (800) with a belt reducer is increased by a first speed ratio multiple through the first speed change gearbox (230), and the output torque is reduced by a first speed ratio multiple through the first speed change gearbox (230), and then the output speed is increased by a second speed ratio multiple through the second speed change gearbox (220), and the output torque is reduced by a second speed ratio multiple through the second speed change gearbox (220); The test shaft seat device (300) comprises a first fixing frame (310), a vertical shaft coupling (320), a transmission gear sleeve assembly (330), a torque sensor (340) and a rotational speed sensor (350), the first fixing frame (310) is fixedly installed on the test chassis (100), the vertical shaft coupling (320) is connected with the first speed change gearbox (230), the transmission gear sleeve assembly (330) is used for connecting the output shaft of the rotary hydraulic motor assembly (800) with a belt reducer, and the transmission gear sleeve assembly (330) is rotationally connected with the first fixing frame (310), the torque sensor (340) is connected between the vertical shaft coupling (320) and the transmission gear sleeve assembly (330), and the rotational speed sensor (350) is installed on the transmission gear sleeve assembly (330).

2. The test system for a rotary hydraulic motor assembly with a speed reducer of claim 1, wherein, The output shaft of the servo motor (210) is connected with a transmission shaft (250) through a first shaft coupling (240), the transmission shaft (250) is connected with the second speed change gearbox (220) through a second shaft coupling (260), and the second speed change gearbox (220) is connected with the first speed change gearbox (230) through a third shaft coupling (270); a bearing seat (290) is fixedly installed on the test chassis (100), the transmission shaft (250) penetrates through the bearing seat (290) and is rotationally connected with the bearing seat (290).

3. The test system for a rotary hydraulic motor assembly with a speed reducer of claim 1, wherein, The transmission gear sleeve assembly (330) comprises a fixedly connected transmission gear sleeve (331) and a vertical rotating shaft (332), the transmission gear sleeve (331) is used for connecting the output shaft of the rotary hydraulic motor assembly (800) with a speed reducer, the vertical rotating shaft (332) is rotatably installed on the first fixed frame (310), a bearing (360) is arranged between the vertical rotating shaft (332) and the fixed frame, the first fixed frame (310) is connected with a bearing end cover (370) located at the end of the bearing (360), and the vertical rotating shaft (332) is connected with the torque sensor (340).

4. The test system for a rotary hydraulic motor assembly with a speed reducer of claim 3, wherein, The torque sensor (340) is fixedly connected with the vertical rotating shaft (332) through a shaft sleeve (380), and the rotating speed sensor (350) is fixedly installed on the outer periphery of the shaft sleeve (380).

5. The test system for rotary hydraulic motor assemblies with a speed reducer of claim 1, wherein, The fixed seat device (400) comprises a second fixed frame (410), a mounting disc (420) and a square key (430), the rotary hydraulic motor assembly (800) with a speed reducer is fixed on the mounting disc (420), and the mounting disc (420) is fixedly installed on the second fixed frame (410) through the square key (430).

6. The test system for a rotary hydraulic motor assembly with a speed reducer of claim 5, wherein, The second fixed frame (410) and the first fixed frame (310) are isosceles trapezoidal, the central axes of the first fixed frame (310) and the second fixed frame (410) are collinear, and the first fixed frame (310) is located on the inner side of the second fixed frame (410).

7. The test system for rotary hydraulic motor assemblies with a speed reducer of claim 2, wherein, Further comprising a brake disc (280) and a brake device (500), the brake disc (280) is arranged on the outer periphery of the transmission shaft (250), the brake device (500) comprises a friction block (510) and a driving member (520), the driving member (520) is used for driving the friction block (510) to approach or move away from the brake disc (280), and the friction block (510) is connected to the output end of the driving member (520).

8. The test system for a rotary hydraulic motor assembly with a speed reducer of claim 7, wherein, Further comprising a jaw assembly (530) and a sliding support (540) fixedly installed on the test chassis (100), the brake disc (280) and the friction block (510) are located on the inner side of the jaw assembly (530), the driving member (520) is fixed to the side wall of the jaw assembly (530), the jaw assembly (530) is in sliding connection with the sliding support (540), and the resetter (550) is connected between the jaw assembly (530) and the sliding support (540).

9. The test system for rotary hydraulic motor assemblies with a speed reducer of any of claims 1 to 8, wherein, Further comprising a first circulating lubrication cooling device (600) for lubricating the first variable speed gearbox (230) and a second circulating lubrication cooling device (700) for lubricating the second variable speed gearbox (220), and the first circulating lubrication cooling device (600) and the second circulating lubrication cooling device (700) are installed on the test chassis (100).

10. The test system for a rotary hydraulic motor assembly with a speed reducer of claim 9, wherein, The first circulating lubrication cooling device (600) and the second circulating lubrication cooling device (700) each comprise a lubrication pump (610) and a circulating pipeline (620) connected between the lubrication pump (610) and the first transmission gear box (230) or the second transmission gear box (220), wherein the circulating pipeline (620) is provided with a filter (630), a radiator assembly (640), a temperature sensor (650) and a pressure gauge (660).

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