A reducer testing system and a testing method

Abstract

The present invention provides a reducer test system and a test method, belonging to the technical field of reducer testing. The reducer test system includes a reducer test bench, a lubricating oil circulation circuit and a cooling device, which are used to perform simulated working condition tests on the main tested reducer assembly in the reducer test bench. The lubricating oil circulation circuit is connected to the main tested reducer assembly to circulate the lubricating oil in the main tested reducer assembly. The cooling device cools the lubricating oil in the lubricating oil circulation circuit, realizing the heat dissipation of the lubricating oil inside the main tested reducer assembly, maintaining the temperature of the lubricating oil entering the main tested reducer assembly within the target temperature range, keeping the main tested reducer assembly running efficiently and stably, so as to avoid the influence of the change of the temperature parameter of the lubricating oil on the test result, thereby reducing the error of the test parameter and improving the test efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of reducer testing, and particularly relates to a reducer testing system and a testing method. Background Art

[0002] Rotary reducers are widely used in construction machinery, such as excavators, rotary drilling rigs, concrete pumps, and cranes. As a pipe device for the construction machinery to perform rotary actions, the reducer can bear radial loads. With the development of China's engineering construction, the use of construction machinery is increasing, and the operating environment faced is becoming more and more complex. Under special working conditions, it is necessary to ensure that the reducer can maintain its normal rotary working performance during continuous operation of the construction machinery.

[0003] In order to meet the normal operation of the reducer under special working conditions, during the production and R & D process of the reducer, it is necessary to conduct simulation tests for special working conditions to ensure the stability and safety of the reducer. In the existing test devices, mainly on a rotary platform, a companion test machine is used to simulate the body weight of the construction machinery, and then frequent start, stop, and commutation operations are performed on the reducer to be tested. However, during continuous testing, the temperature of the lubricating oil inside the reducer will rise, and the temperature rise of the lubricating oil of different reducers will be different. As the testing time and number of times increase, the temperature of the lubricating oil also changes, and the lubricating effect of the lubricating oil also changes accordingly, resulting in unstable internal transmission of the reducer, and further leading to large errors in the parameters obtained from multiple tests of the same performance of the same reducer, or large errors in the parameters obtained from the tests of the same performance of the same batch of reducers. Summary of the Invention

[0004] To solve the above technical problems, the present invention provides a reducer testing system and a testing method, which can realize the heat dissipation of the lubricating oil inside the main test reducer assembly, maintain the temperature of the lubricating oil within the target temperature range, reduce test errors, and improve test efficiency.

[0005] To achieve this purpose, the present invention provides a reducer testing system, which includes:

[0006] A reducer test bench, including a main test reducer assembly;

[0007] A lubricating oil circulation circuit, which is connected to the main test reducer assembly and is used to circulate the lubricating oil inside the main test reducer assembly; and

[0008] A cooling device, which is arranged on the lubricating oil circulation circuit and is used to cool the lubricating oil in the lubricating oil circulation circuit.

[0009] Preferably, the lubricating oil circulation circuit includes a first oil tank and a filter. The oil inlet and the oil outlet of the first oil tank are respectively connected to the main test reducer assembly, and the filter is arranged on the oil inlet and / or the oil outlet.

[0010] Preferably, the cooling device includes a circulating pump air cooler and a temperature sensor. The temperature sensor is installed on the first oil tank to detect the temperature of the gear oil in the first oil tank. When the temperature of the gear oil is greater than a preset target temperature, the circulating pump air cooler is started.

[0011] Preferably, the lubricating oil circulation circuit further includes a first pressure regulating valve, and the first pressure regulating valve is arranged on the oil outlet.

[0012] Preferably, the reducer test bench further includes: a rotary platform and a companion test reducer assembly; the main test reducer assembly and the companion test reducer assembly are respectively rotationally assembled with the rotary platform, and the companion test reducer assembly forms a counter-torque with the main test reducer assembly.

[0013] Preferably, the main test reducer assembly includes a first reducer and a driving device. The first reducer includes a first input end and a relative first output end. The first input end is connected to the driving device, the first output end is rotationally matched with the rotary platform, and the first reducer is connected to the lubricating oil circulation circuit.

[0014] Further preferably, the driving device includes one of a driving motor or a hydraulic motor.

[0015] Preferably, the companion test reducer assembly includes a second reducer and a load simulation device. The second reducer includes a second input end and a relative second output end. The second input end is rotationally matched with the rotary platform, and the second output end is connected to the load simulation device.

[0016] Preferably, the load simulation device includes a hydraulic pump and a pressure regulating circulation oil circuit. The hydraulic pump is connected to the second output end. The pressure regulating circulation oil circuit includes a second oil tank and a second pressure regulating valve. Wherein, the oil suction port of the hydraulic pump is connected to the second oil tank, and the oil discharge port of the hydraulic pump is sequentially connected to the second pressure regulating valve and the second oil tank.

[0017] Further preferably, the second pressure regulating valve includes one of an overflow valve, a pressure relief valve, a pressure reducing valve or a sequence valve. The second pressure regulating valve is used to set the pressure value of the high-pressure oil discharged from the oil discharge port.

[0018] Preferably, the rotary platform includes a support base and an internal gear ring assembly. The internal gear ring assembly is rotationally installed on the support base, and the internal gear ring assembly is respectively meshed and driven with the main test reducer assembly and the companion test reducer assembly.

[0019] The present invention also provides a testing method for a speed reducer, which is applied to the above-mentioned speed reducer testing system. The speed reducer testing method includes:

[0020] Start the speed reducer test bench to run the main tested speed reducer assembly to a preset working condition. Among them, the lubricating oil circulation circuit passively circulates the lubricating oil in the main tested speed reducer assembly, and the cooling device cools the lubricating oil in the lubricating oil circulation circuit to keep the temperature of the lubricating oil entering the main tested speed reducer assembly within the target temperature range;

[0021] Keep the main tested speed reducer assembly running for a predetermined period of time under the preset working condition;

[0022] Obtain the test parameter information of the main tested speed reducer assembly, stop the speed reducer test bench, and the test is completed.

[0023] Advantages of the present invention:

[0024] A speed reducer testing system and a testing method provided by the present invention are used to perform simulated working condition tests on the main tested speed reducer assembly in the speed reducer test bench. The speed reducer testing system includes a speed reducer test bench, a lubricating oil circulation circuit and a cooling device. The lubricating oil circulation circuit is connected to the main tested speed reducer assembly to circulate the lubricating oil in the main tested speed reducer assembly. The cooling device cools the lubricating oil in the lubricating oil circulation circuit, realizes the heat dissipation of the lubricating oil inside the main tested speed reducer assembly, keeps the temperature of the lubricating oil entering the main tested speed reducer assembly within the target temperature range, and keeps the main tested speed reducer assembly running efficiently and stably, so as to avoid the influence of the change of the temperature parameter of the lubricating oil on the test result, reduce the error of the test parameter, and improve the test efficiency. Description of the Drawings

[0025] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required in the embodiments. It should be understood that the following drawings only show some embodiments of the present invention, so they should not be regarded as limiting the scope. For those of ordinary skill in the art, without creative efforts, other related drawings can also be obtained based on these drawings.

[0026] Figure 1 Shows a schematic structural diagram of a speed reducer testing system provided by an embodiment of the present invention;

[0027] Figure 2 Shows a partial schematic diagram of the accompanying tested speed reducer assembly in an embodiment of the present invention;

[0028] Figure 3Shows a partial schematic diagram of the main test reducer assembly in an embodiment of the present invention;

[0029] Figure 4 Shows a top view of the reducer test bench in an embodiment of the present invention;

[0030] Figure 5 Shows a schematic diagram of the oil circuit of the lubricating oil circulation circuit in an embodiment of the present invention;

[0031] Figure 6 Shows a schematic diagram of the oil circuit of the load simulation device in an embodiment of the present invention.

[0032] Description of main component symbols:

[0033] 1 - Mounting base; 2 - Platform support plate; 3 - Companion test reducer assembly; 4 - Main test reducer assembly; 5 - Lubricating oil circulation circuit, 6 - Circulation pump air cooler; 20 - Shock pad; 21 - Internal gear ring assembly; 23 - Mounting hole; 30 - Second reducer; 31 - Load simulation device; 31a - Hydraulic pump; 31b - Pressure gauge; 31c - Second pressure regulating valve; 31d - Second oil tank; 32 - Second support frame; 33 - Second driving gear; 34 - Second bearing; 40 - First reducer; 40a - First oil drain port; 40b - First oil suction port; 41 - Driving device, 41a - Hydraulic motor; 42 - First support frame; 43 - First driving gear; 44 - First bearing; 50 - First oil tank; 50a - Oil inlet; 50b - Oil outlet; 51 - Filter; 52 - First pressure regulating valve; 60 - Temperature sensor; 100 - Reducer test bench; 201 - Internal gear ring part, 202 - Outer fixed ring. Detailed implementation manners

[0034] The embodiments of the present invention will be described in detail below. The examples of the embodiments are shown in the drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are only used to explain the present invention and should not be construed as a limitation to the present invention.

[0035] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and 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, and thus should not be construed as a limitation to the present invention.

[0036] In addition, the terms "first" and "second" are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, "a plurality of" means two or more unless otherwise specifically defined.

[0037] In the present invention, unless otherwise clearly specified and defined, terms such as "installed", "connected", "coupled", "fixed", etc. should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0038] In the present invention, unless otherwise clearly specified and defined, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0039] Embodiment 1

[0040] Please refer to Figure 1 , this embodiment provides a speed reducer test system, including: a speed reducer test bench 100, a lubricating oil circulation circuit 5 and a cooling device. Among them, the speed reducer test bench 100 is used to test the speed reducer to obtain various performance parameters of the speed reducer, and these parameters may include lubrication effect, anti-torsion ability, transmission efficiency, etc. The lubricating oil circulation circuit 5 is used to circulate the lubricating oil in the main tested speed reducer assembly 4, and the cooling device cools the lubricating oil in the lubricating oil circulation circuit 5 to maintain the temperature of the lubricating oil within the target temperature range.

[0041] The speed reducer test bench 100 includes: a rotating platform, a main tested speed reducer assembly 4 and an accompanying tested speed reducer assembly 3. The main tested speed reducer assembly 4 and the accompanying tested speed reducer assembly 3 are respectively rotationally assembled with the rotating platform, and the accompanying tested speed reducer assembly 3 forms a torsional pair with the main tested speed reducer assembly 4.

[0042] Combined with reference to Figure 2 andFigure 3 , specifically, the slewing platform includes: a support base and an internal gear ring assembly 21 rotatably mounted on the support base. Among them, the support base includes a mounting base 1 and a platform support plate 2. The mounting base 1 is arranged horizontally on the ground. The platform support plate 2 is mounted on the mounting base 1, and a slewing space is formed between the platform support plate 2 and the mounting base 1. The internal gear ring assembly 21 is rotatably mounted in the slewing space.

[0043] In some specific embodiments, a shock pad 20 is provided between the platform support plate 2 and the mounting base 1.

[0044] In this embodiment, the internal gear ring assembly 21 includes an internal gear ring member 201 and an opposing outer fixing ring 202. The outer fixing ring 202 is sleeved outside the internal gear ring member 201 and is coaxially arranged with the internal gear ring member 201. The outer fixing ring 202 is mounted on the mounting base 1. The internal gear ring member 201 forms a rotational assembly with the outer fixing ring 202 through a plurality of movable balls. Teeth for meshing are provided on the inner side of the internal gear ring.

[0045] In some specific embodiments, the internal gear ring assembly 21 selects a slewing support member. Teeth for meshing are provided on the inner ring of the slewing support member, that is, this inner ring is the internal gear ring member 201.

[0046] In some specific embodiments, the internal gear ring assembly 21 includes a slewing support member and an internal gear ring member 201. The internal gear ring member 201 is rotatably mounted on the inner ring of the slewing support member.

[0047] In some specific embodiments, the mounting base 1 is directly placed on the ground or fixedly mounted on the ground by bolts.

[0048] Refer to Figure 1 , Figure 3 , Figure 4 and Figure 5 , the main test reducer assembly 4 includes: a first reducer 40 and a driving device 41. Among them, the first reducer 40 is mounted on the platform support plate 2 through a first support frame 42. Corresponding mounting holes 23 are provided on the platform support plate 2. The first reducer 40 includes a first input end and an opposing first output end. The first output end faces the mounting base 1 and is provided with a first transmission gear 43. The first transmission gear 43 is rotatably matched with the first support frame 42 through a first bearing 44. The first transmission gear 43 forms a meshing transmission with the internal gear ring member 201. The first input end is connected to the driving device 41.

[0049] In some specific embodiments, the first transmission gear 43 may be a gear shaft structure, which is connected to the first output end through a coupling.

[0050] It can be understood that the driving device 41 drives the first input end to rotate, the first output end outputs power, and drives the first transmission gear 43 to mesh and drive with the internal gear ring member 201, thereby driving the internal gear ring member 201 to rotate.

[0051] It can be seen that Figure 5 , further in this embodiment, the first speed reducer 40 is also provided with a first oil drain port 40a and a relative first oil suction port 40b. The first oil drain port 40a and the first oil suction port 40b are respectively communicated with the lubricating oil circulation circuit 5, thereby realizing the circulation of the lubricating oil in the first speed reducer 40 in the lubricating oil circulation circuit 5. Specifically, the rotation of the first speed reducer 40 forms a positive pressure at the first oil drain port 40a, realizing the discharge of the lubricating oil inside the first speed reducer 40 into the lubricating oil circulation circuit 5, and at the same time forming a negative pressure at the first oil suction port 40b to suck the lubricating oil in the lubricating oil circulation circuit 5 into the first speed reducer 40 to form a self-circulation of the lubricating oil.

[0052] In some specific embodiments, the lubricating oil can be selected as gear oil or hydraulic oil, etc. The above are just several examples listed and do not limit the protection scope of this application. The selection of the lubricating oil is mainly based on a flowing liquid lubricant to ensure the smoothness of the circulating flow.

[0053] Further, the driving device 41 includes a driving motor or a hydraulic motor 41a. The above are just several examples listed and do not limit the protection scope of this application. In this embodiment, the driving device 41 selects the hydraulic motor 41a, and the hydraulic motor 41a is connected to a second oil tank 31d through a pipeline.

[0054] Refer to Figure 1 , Figure 2 , Figure 4 and Figure 6, the auxiliary test reducer assembly 3 is disposed on the other side of the rotary platform relative to the main test reducer assembly 4 to form a torsional pair with the main test reducer assembly 4. Specifically, the auxiliary test reducer assembly 3 includes: a second reducer 30 and a load simulation device 31. Among them, the second reducer 30 is installed on the platform support plate 2 through a second support frame 32, and corresponding mounting holes 23 are provided on the platform support plate 2. The second reducer 30 includes a second input end and an opposite second output end. The second input end faces the mounting base 1 and is provided with a second transmission gear 33. The second transmission gear 33 is rotationally matched with the second support frame 32 through a second bearing 34. The second transmission gear 33 is in meshing transmission with the internal gear ring member 201, and the second output end is connected to the load simulation device 31.

[0055] In some specific embodiments, the second transmission gear 33 may be a gear shaft structure, which is connected to the second input end through a coupling.

[0056] It can be understood that the first reducer 40 drives the internal gear ring member 201 to rotate. The internal gear ring member 201 drives the second transmission gear 33 to rotate, transmits the power to the second reducer 30. The second reducer 30 transmits the power to the load simulation device 31 through the second output end. The load simulation device 31 provides a rotational resistance to the second output end of the second reducer 30, thereby forming a torsional pair between the second reducer 30 and the first reducer 40. Among them, this resistance is the simulated load provided by the auxiliary test reducer assembly 3 for the main test reducer assembly 4.

[0057] It can be referred to Figure 6 , further in this embodiment, the load simulation device 31 includes: a hydraulic pump 31a and a pressure regulating circulation oil circuit. The hydraulic pump 31a is installed on the second output end through a coupling. The pressure regulating circulation oil circuit includes the second oil tank 31d and the second pressure regulating valve 31c. Among them, the hydraulic pump 31a includes a second oil suction port and a second oil discharge port. The second oil suction port is connected to the second oil tank 31d through a pipeline, and the second oil discharge port is connected to the second pressure regulating valve 31c and the second oil tank 31d through a pipeline in sequence.

[0058] It can be understood that the second speed reducer 30 drives the hydraulic pump 31a to rotate through the second output end. The oil suction port of the hydraulic pump 31a sucks oil from the second oil tank 31d, and after the hydraulic pump 31a sucks oil, it discharges high-pressure oil from the oil discharge port. This high-pressure oil needs to return to the second oil tank 31d through the second pressure regulating valve 31c. Further, by adjusting the opening pressure of the second pressure regulating valve 31c, the rotation and oil suction of the hydraulic pump 31a are resisted, and then the rotation of the second speed reducer 30 driving the hydraulic pump 31a is resisted by this resistance, and this resistance is the simulated load provided by the accompanying test speed reducer assembly 3 for the main test speed reducer assembly 4.

[0059] In some specific embodiments, the second oil tank 31d shared by the hydraulic pump 31a and the hydraulic motor 41a can be separately arranged into an independent oil tank.

[0060] In some specific embodiments, the second regulating valve includes one of an overflow valve, a throttle valve, a pressure relief valve, a pressure reducing valve or a sequence valve. The second pressure regulating valve 31c is used to set the pressure value of the high-pressure oil discharged from the oil discharge port. It should be noted that the above is only an example and cannot be used as a limitation of the protection scope of this application.

[0061] In this embodiment, an overflow valve is selected for pressure regulation. Further, a pressure gauge 31b is also installed between the second oil discharge port and the second pressure regulating valve 31c. The pressure gauge 31b can be a mechanical or electronic pressure gauge 31b, which is used to more intuitively display the pressure value of the second oil discharge port.

[0062] The lubricating oil circulation circuit 5 includes: a first oil tank 50, a filter 51 and a first pressure regulating valve 52. The oil inlet 50a and the oil outlet 50b of the first oil tank 50 are respectively connected to the first oil discharge port 40a and the first oil suction port 40b of the first speed reducer 40 through pipelines.

[0063] In this embodiment, the filter 51 is arranged on the oil inlet 50a to clean and filter the lubricating oil discharged from the first oil discharge port 40a, so as to ensure that the lubricating oil returning to the first oil suction port 40b through the first oil tank 50 is clean.

[0064] In some specific embodiments, valves are provided at both the oil inlet 50a and the oil outlet 50b. The valves can be manual valves, or electric valves, or a combination of manual valves and electric valves.

[0065] In some specific embodiments, the filter 51 is disposed on the oil outlet 50b, or one filter 51 is provided on each of the oil inlet 50a and the oil outlet 50b. These technical solutions can clean and filter the lubricating oil entering the first oil suction port 40b.

[0066] It can be understood that clean lubricating oil can ensure that the first speed reducer 40 operates efficiently and stably, and further reduce the error of the test parameters. At the same time, the stability and safety of the main test speed reducer assembly 4 are ensured, and the test stop caused by speed reducer failures and other reasons during the test is reduced, thereby improving the test efficiency.

[0067] In this embodiment, the first pressure regulating valve 52 is disposed on the oil outlet 50b to regulate the oil pressure of the lubricating oil delivered from the oil outlet 50b to the first speed reducer 40, so as to maintain the internal pressure of the first speed reducer 40 stable, and at the same time ensure that the oil volume of the lubricating oil in the first speed reducer 40 is constant, avoiding the influence of pressure and oil volume fluctuations on the test effect, thereby further reducing the test error and improving the test efficiency.

[0068] Further in this embodiment, a liquid level controller is further provided on the first oil tank 50. The liquid level controller is used to detect the oil level of the lubricating oil in the first oil tank 50 and is linked with the first pressure regulator. Specifically, when the oil level of the first oil tank 50 is higher than the test set value, the oil outlet 50b discharges oil. At the same time, the oil pressure of the discharged oil is regulated by the first pressure regulating valve 52. The lubricating oil enters the interior of the first speed reducer 40 through the first oil suction port 40b. After lubricating inside the first speed reducer 40, it is then discharged into the first oil tank 50 through the first oil drain port 40a to form a complete circulation loop.

[0069] Refer to Figure 1 、 Figure 3 and Figure 5, the cooling device is arranged on the lubricating oil circulation circuit 5 and includes a circulating pump air cooler 6 and a temperature sensor 60. Among them, the temperature sensor 60 is installed on the first oil tank 50 and is electrically connected to the circulating pump air cooler 6 for detecting the temperature of the gear oil in the first oil tank 50. The circulating pump air cooler 6 is arranged on the first oil tank 50. The temperature sensor 60 monitors the lubricating oil in the first oil tank 50 at all times. When the temperature of the lubricating oil in the first oil tank 50 is greater than the preset target temperature, the circulating pump air cooler 6 starts to cool to keep the temperature of the lubricating oil within the target temperature range required for the test. When the lubricating oil drops within the target temperature range, the circulating pump air cooler 6 stops. This ensures that the lubricating oil delivered to the first speed reducer 40 always remains within the target temperature range, reduces test errors, and improves test efficiency. It can be understood that this target temperature range is set according to actual needs during the test.

[0070] Among them, the circulating pump air cooler 6 includes an air cooler and a circulating pump, and it cools by pumping the lubricating oil through the air cooler by the circulating pump.

[0071] Combined with Figures 1-6 , this embodiment is implemented as follows:

[0072] In the main test speed reducer assembly 4, the first speed reducer 40 is driven to rotate by the hydraulic motor 41a, and the first transmission gear 43 drives the internal gear ring part 201 to rotate.

[0073] The companion test speed reducer assembly 3 simulates the actual working conditions of the main test speed reducer assembly 4. The internal gear ring part 201 drives the second transmission gear 33 to rotate, and then drives the second speed reducer 30 to rotate. The second output end is connected to the load simulation device 31. Among them, the load simulation device 31 gives resistance to the rotation of the second output end of the second speed reducer 30, thereby forming a torque counteraction between the second speed reducer 30 and the first speed reducer 40.

[0074] In the lubricating oil circulation circuit 5, when the first speed reducer 40 rotates, pressure is formed inside, and this pressure discharges the lubricating oil in the first speed reducer 40 from the first oil discharge port 40a. The lubricating oil enters the first oil tank 50 through the pipeline from the oil inlet 50a. At the same time, due to negative pressure, the first oil suction port 40b sucks in the lubricating oil from the oil outlet 50b. The filter 51 is arranged at the oil inlet 50a to clean and filter the lubricating oil entering the first oil tank 50. Therefore, the lubricating oil sucked in by the first oil suction port 40b is also clean.

[0075] The cooling device dissipates heat from the lubricating oil in the first oil tank 50, so that the lubricating oil sucked in by the first oil suction port 40b is maintained within the target temperature range.

[0076] The reducer test system provided in this embodiment provides lubricating oil with stable pressure, stable flow rate and stable temperature for the first reducer 40 in the main test reducer assembly 4, greatly reducing the influence of the lubricating oil on the test parameters. Therefore, the parameter errors obtained from multiple tests of the same performance of the same reducer, or the test parameter errors of the same performance of the reducers in the same batch, are greatly reduced, so as to improve the detection accuracy. At the same time, the overheating or failure shutdown of the first reducer 40 caused by the lubricating oil is reduced, and the test efficiency is improved.

[0077] Embodiment Two

[0078] Reference can continue to be made to Figure 1 and Figure 2 , this embodiment provides a reducer test system, which makes changes to the accompanying test reducer assembly 3 on the basis of Embodiment One, and other solutions are not adjusted, and the technical solutions in Embodiment One are continued to be used. The specific changes are as follows:

[0079] The accompanying test reducer assembly 3 is arranged on the other side of the rotary platform relative to the main test reducer assembly 4 for forming a counter-torsion with the main test reducer assembly 4. Specifically, the accompanying test reducer assembly 3 includes: a second reducer 30 and a load simulation device 31. Among them, the second reducer 30 is installed on the platform support plate 2 through a second support frame 32. The second reducer 30 includes a second input end and a relative second output end. The second input end is connected to the load simulation device 31, the second output end faces the installation base 1, and a second transmission gear 33 is installed. The second transmission gear 33 is rotationally matched with the second support frame 32 through a second bearing 34, and the second transmission gear 33 is in meshing transmission with the internal gear ring part 201.

[0080] Embodiment Three

[0081] Reference can continue to be made to Figure 1 and Figure 2 , this embodiment provides a reducer test system, which makes changes to the load simulation device 31 in the accompanying test reducer assembly 3 on the basis of Embodiment One or Embodiment Two, and other solutions are not adjusted, and the technical solutions in Embodiment One are continued to be used. Specifically, the load simulation device 31 is selected as an inertial flywheel structure.

[0082] Embodiment Four

[0083] Refer to Figures 1-6, this embodiment provides a reduction gear testing method, which is applied to the reduction gear testing system provided in the above-mentioned Embodiment 1, Embodiment 2 or Embodiment 3. Specifically, the reduction gear testing method includes the following steps:

[0084] S01: Start the reduction gear test bench 100 to make the first reduction gear 40 run to a preset working condition;

[0085] Among them, the hydraulic motor 41a drives the first reduction gear 40 to rotate, the first transmission gear 43 drives the internal gear ring part 201 to rotate, and the internal gear ring part 201 drives the second transmission gear 33 to rotate, thereby driving the second reduction gear 30 to rotate. The second output end drives the hydraulic pump 31a to rotate. The oil suction port of the hydraulic pump 31a sucks oil from the second oil tank 31d. After the hydraulic pump 31a sucks oil, it discharges high-pressure oil from the oil discharge port.

[0086] By adjusting the opening pressure of the second pressure regulating valve 31c, that is, adjusting the opening pressure of the overflow valve in this embodiment, the rotation and oil suction of the hydraulic pump 31a are resisted, and thus the rotation of the second reduction gear 30 driving the hydraulic pump 31a is resisted. This resistance is the simulated load provided by the accompanying test reduction gear assembly 3 for the main test reduction gear assembly 4.

[0087] The first reduction gear 40 discharges lubricating oil from the first oil discharge port 40a. After being filtered and cleaned by the filter 51, it enters the first oil tank 50. The first oil suction port 40b sucks oil from the first oil tank 50. When the liquid level controller detects that the oil level of the lubricating oil in the first oil tank 50 is higher than the test set value, the oil outlet 50b discharges oil. At the same time, the oil outlet pressure of the oil outlet 50b is adjusted through the first pressure regulating valve 52, and the lubricating oil enters the interior of the first reduction gear 40 through the first oil suction port 40b.

[0088] The temperature sensor 60 monitors the lubricating oil in the first oil tank 50 at all times. When the temperature of the lubricating oil in the first oil tank 50 is greater than the preset target temperature, the circulating pump air cooler 6 starts to cool to keep the temperature of the lubricating oil within the target temperature range required for the test. When the lubricating oil drops within the target temperature range, the circulating pump air cooler 6 stops.

[0089] S02: Keep the main test reduction gear assembly 4 running for a predetermined period of time under the preset working condition;

[0090] Among them, the preset working condition corresponds to the opening pressure of the overflow valve. In this embodiment, it is advisable that the predetermined period of time is greater than or equal to 1000 hours.

[0091] S03: Obtain the test parameter information of the first reducer 40 in the main test reducer assembly 4, stop the reducer test bench 100, and the test is completed.

[0092] The parameter information includes parameters such as the pressure, lubrication effect, anti-torsion ability, and transmission efficiency of the first reducer 40.

[0093] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0094] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present invention.

Claims

1. A speed reducer test system, characterized in that Comprising: A reducer test bench, including a main test reducer assembly, a rotary platform and an accompanying test reducer assembly; The main test reducer assembly and the accompanying test reducer assembly are respectively rotationally assembled with the rotary platform, and the accompanying test reducer assembly forms a counter-twist with the main test reducer assembly; A lubricating oil circulation circuit, which is communicated with the main test reducer assembly for circulating the lubricating oil in the main test reducer assembly; and a cooling device, which is arranged on the lubricating oil circulation circuit for cooling the lubricating oil in the lubricating oil circulation circuit; Wherein, the main test reducer assembly includes a first reducer and a driving device, the first reducer includes a first input end and a relative first output end, the first input end is connected to the driving device, the first output end is rotationally matched with the rotary platform, and the first reducer is communicated with the lubricating oil circulation circuit; a first oil drain port and a relative first oil suction port are arranged on the first reducer, and the first oil drain port and the first oil suction port are respectively communicated with the lubricating oil circulation circuit; when the first reducer rotates, it is adapted to form a positive pressure at the first oil drain port and a negative pressure at the first oil suction port to drain the lubricating oil inside the first reducer into the lubricating oil circulation circuit; and suck the lubricating oil in the lubricating oil circulation circuit into the first reducer; The accompanying test reducer assembly includes a second reducer and a load simulation device, the second reducer includes a second input end and a relative second output end, the second input end is rotationally matched with the rotary platform, and the second output end is connected to the load simulation device; the load simulation device includes a hydraulic pump and a pressure regulating circulation oil circuit, the hydraulic pump is connected to the second output end, and the pressure regulating circulation oil circuit includes a second oil tank and a second pressure regulating valve. Wherein, the oil suction port of the hydraulic pump is communicated with the second oil tank, and the oil discharge port of the hydraulic pump is sequentially communicated with the second pressure regulating valve and the second oil tank; the second pressure regulating valve is adapted to provide a simulated load for the main test reducer assembly.

2. The reducer test system according to claim 1, wherein The lubricating oil circulation circuit includes a first oil tank and a filter, the oil inlet and the oil outlet of the first oil tank are respectively communicated with the main test reducer assembly, and the filter is arranged on the oil inlet and / or the oil outlet.

3. The speed reducer test system according to claim 2, wherein, The cooling device includes a circulating pump air cooler and a temperature sensor, the temperature sensor is installed on the first oil tank for detecting the temperature of the gear oil in the first oil tank, and when the temperature of the gear oil is greater than a preset target temperature, the circulating pump air cooler is started.

4. The reducer testing system according to claim 2, wherein The lubricating oil circulation circuit further includes a first pressure regulating valve, and the first pressure regulating valve is arranged at the oil outlet.

5. The speed reducer test system according to claim 1, wherein The driving device includes one of a driving motor or a hydraulic motor.

6. The speed reducer testing system according to claim 1, wherein The second pressure regulating valve includes one of an overflow valve, a pressure relief valve, a pressure reducing valve or a sequence valve.

7. The speed reducer testing system according to claim 1, wherein, The rotary platform includes a support base and an internal gear ring assembly, the internal gear ring assembly is rotationally installed on the support base, and the internal gear ring assembly meshes and drives with the main test reducer assembly and the accompanying test reducer assembly respectively.

8. A method for testing a speed reducer, characterized in that Applied to the reducer test system according to any one of claims 1-7, the reducer test method includes: Start the reducer test bench and run the main test reducer assembly to a preset working condition. Among them, the lubricating oil circulation circuit passively circulates the lubricating oil in the main test reducer assembly, and the cooling device cools the lubricating oil in the lubricating oil circulation circuit to keep the temperature of the lubricating oil entering the main test reducer assembly within the target temperature range; Keep the main test reducer assembly running for a preset duration under the preset working condition; Obtain the test parameter information of the main test reducer assembly, stop the reducer test bench, and the test is completed.

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