Hub reduction gear performance detection test bed and test method

Abstract

The invention relates to the technical field of mechanical transmission performance testing, in particular to a hub reduction gear performance detection test bed and a test method. The test bench comprises a cross coupling, two bearing seats, a test hub reduction gear and an accompanying test hub reduction gear which are symmetrically arranged about the center line of the cross coupling, and an input end rotating speed torque sensor and an output end rotating speed torque sensor which are respectively connected with the test hub reduction gear and the accompanying test hub reduction gear through telescopic transmission shafts, the speed regulating motor and the loading motor are connected with the input end rotating speed torque sensor and the output end rotating speed torque sensor respectively, the bearing seats are connected with the speed reducers and the cross coupling, the detection units are arranged on the two speed reducers respectively to monitor performance parameters of the two speed reducers, the cross coupling can transmit torque, and the loading motor is connected with the loading motor. The centering precision is guaranteed through the machining precision, and the assembling efficiency and the centering precision are improved.

Description

Technical Field

[0001] The invention relates to the technical field of mechanical transmission performance testing, and in particular to a wheel-end reducer performance testing bench and a testing method. Background Art

[0002] The wheel-side reducer is the last stage of deceleration and torque increase device in the vehicle travel system. The wheel-side reducer itself has a large internal transmission density and a complex structure. In order to ensure the reliability of the transmission, it is necessary to test and analyze the performance of the wheel-side reducer.

[0003] At present, the transmission performance test of wheel-side reducers is mostly carried out by supporting tests. There is a problem of centering error in the connection between the test wheel-side reducer and the companion wheel-side reducer. In addition, the connection of the speed torque sensor requires a transition device, which further increases the number of test benches and leads to a decrease in assembly accuracy and efficiency. Summary of the invention

[0004] In order to solve the above technical problems, the present invention provides a wheel reducer performance detection test bench and a test method which can improve the centering accuracy and assembly efficiency of the wheel reducer during performance detection.

[0005] A first aspect of the present invention provides a wheel-side reducer performance detection test bench, comprising a cross coupling, two bearing seats, a test wheel-side reducer, a companion test wheel-side reducer, an input end speed torque sensor, an output end speed torque sensor, a speed regulating motor, a loading motor and a detection unit, wherein the test wheel-side reducer and the companion test wheel-side reducer are symmetrically arranged about the center line of the cross coupling, and their planetary ends are respectively connected to the two bearing seats, and the opposite ends of the two bearing seats are both connected to the cross coupling, the test wheel-side reducer is connected to one end of the input end speed torque sensor through a telescopic transmission shaft, and the other end of the input end speed torque sensor is connected to the speed regulating motor, the companion test wheel-side reducer is connected to one end of the output end speed torque sensor through the telescopic transmission shaft, and the other end of the output end speed torque sensor is connected to the loading motor, and the detection units are respectively arranged on the test wheel-side reducer and the companion test wheel-side reducer to monitor the performance parameters of the test wheel-side reducer and the companion test wheel-side reducer.

[0006] Optionally, the detection unit includes a high-speed vibration acceleration sensor, a planetary vibration acceleration sensor and a temperature sensor to respectively monitor the vibration data of the test wheel reducer and the companion test wheel reducer and the temperature of the planetary lubricating oil therein;

[0007] The specifications and installation positions of the temperature sensors arranged inside the test wheel reducer and the companion test wheel reducer are the same, and the temperature, brand and oil quantity of the lubricating oil used in the test wheel reducer and the companion test wheel reducer are the same.

[0008] Optionally, two temperature sensors are respectively provided on the test wheel reducer and the companion test wheel reducer, and the two temperature sensors are respectively provided on the high-speed stage and the low-speed stage of the test wheel reducer and the companion test wheel reducer.

[0009] Optionally, the test wheel reducer and the companion test wheel reducer have the same structure and specifications, and both include the same internal gears, bearings and connectors.

[0010] Optionally, the high-speed end faces of the test wheel-side reducer and the companion test wheel-side reducer are both fixed by a wheel-side reducer bracket, and the wheel-side reducer bracket is arranged on the test bench.

[0011] Optionally, it also includes a transition connection device, a connecting plate, a speed torque sensor bracket and a motor bracket, the transition connection device is arranged between the two telescopic transmission shafts and the input end speed torque sensor and the output end speed torque sensor, the connecting plate is arranged between the input end speed torque sensor and the output end speed torque sensor and the speed regulating motor and the loading motor, the input end speed torque sensor and the output end speed torque sensor are both arranged on the speed torque sensor bracket, and the speed regulating motor and the loading motor are both arranged on the motor bracket.

[0012] A second aspect of the present invention provides a test method for a wheel reducer performance test bench, which is completed based on the wheel reducer performance test bench described in any of the above embodiments and includes the following steps:

[0013] S1, start the speed regulating motor for trial operation, and ensure that the speed reaches the rated speed to ensure normal operation;

[0014] S2. Set the speed of the speed regulating motor and the torque of the loading motor, and perform no-load test, efficiency test, temperature rise test, overload test and overspeed test in sequence;

[0015] S3, real-time monitoring of the speed and torque of the input speed and torque sensor, when the relative error is greater than a set value, cyclically regulating the speed regulating motor and the loading motor to ensure that the relative error is less than 0.5%;

[0016] S4. During the stage test, relevant data are recorded and saved regularly. The torque value collected by the input end speed torque sensor is Τ1, and the speed value is n1. The torque value collected by the output end speed torque sensor is T2, and the speed value is n2. The number of collected data is K groups. The average power of the input end speed torque sensor and the output end speed torque sensor is:

[0017]

[0018] The average speed of the input end speed torque sensor and the output end speed torque sensor is:

[0019]

[0020] The working efficiency of the test wheel reducer and the accompanying test wheel reducer is obtained as follows:

[0021]

[0022] S5, the detection unit collects the acceleration response signal of the test wheel reducer, analyzes the signal data, obtains the frequency domain response signal of the test wheel reducer, and completes the dynamic performance quality evaluation of the test wheel reducer;

[0023] S6. The detection unit collects the lubricating oil temperature of the test wheel reducer to obtain a trend diagram of the influence of lubricating oil temperature on time and power factor.

[0024] Compared with the prior art, the technical solution provided by the embodiment of the present invention has the following beneficial effects:

[0025] The embodiment of the present invention provides a wheel-side reducer performance detection test bench and test method, the test wheel-side reducer and the accompanying test wheel-side reducer are both connected to the cross coupling through a bearing seat, and are symmetrically arranged about the center line of the cross coupling, the cross coupling transmits torque through the physical structure of "cross interlocking", and its centering accuracy is guaranteed by the processing accuracy, which can not only improve the assembly efficiency, but also further improve the centering accuracy, and solve the problem of low centerline centering accuracy in the wheel-side reducer support test method, and the two wheel-side reducers are connected to the speed torque sensor through a telescopic transmission shaft. When the test bench is built, the telescopic transmission shaft is installed last, which can compensate for the center axis offset error of each component during the installation process, and can realize the various parts of the test bench within an effective range. The connection between the components reduces the difficulty of setting up the test bench and improves work efficiency. At the same time, both reducers are connected with speed and torque sensors. By real-time monitoring of the speed and torque of the speed and torque sensors, it can be found that the speed and loading torque are turbulent within a certain range during the test. By performing deviation detection on the data obtained from real-time monitoring, the dynamic changes of the speed regulating motor and the loading motor are automatically guided, which further improves the accuracy of the performance detection of the wheel-side reducer. The performance parameters of the test wheel-side reducer and the accompanying test wheel-side reducer are monitored by the detection unit, which realizes real-time monitoring of various data in the test. At the same time, the speed and torque of the power source input are corrected in time according to the data feedback, which makes up for the data fluctuation deviation in the test process and improves the accuracy of the test data. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0027] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0028] Figure 1 It is a structural schematic diagram of a wheel reducer performance detection test bench according to an embodiment of the present invention;

[0029] Figure 2 This is a flow chart of the wheel reducer performance detection test described in an embodiment of the present invention.

[0030] Among them, 1. speed regulating motor; 2. connecting plate; 3. input end speed torque sensor; 4. transition connection device; 5. telescopic transmission shaft; 6. test wheel side reducer; 7. bearing seat; 8. cross coupling; 9. test wheel side reducer; 10. motor bracket; 11. speed torque sensor bracket; 12. wheel side reducer bracket; 13. bearing seat bracket; 14. temperature sensor; 15. high-speed vibration acceleration sensor; 16. planetary vibration acceleration sensor; 17. loading motor; 18. output end speed torque sensor. DETAILED DESCRIPTION

[0031] In order to more clearly understand the above-mentioned objectives, features and advantages of the present invention, the scheme of the present invention will be further described below. It should be noted that the embodiments of the present invention and the features in the embodiments can be combined with each other without conflict.

[0032] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein; it is obvious that the embodiments in the specification are only part of the embodiments of the present invention, rather than all of the embodiments.

[0033] Reference Figure 1 and Figure 2 As shown, the first aspect of this embodiment provides a wheel-side reducer performance detection test bench, including a cross coupling 8, two bearing seats 7, a test wheel-side reducer 9, a companion test wheel-side reducer 6, an input-end speed torque sensor 3, an output-end speed torque sensor 18, a speed regulating motor 1, a loading motor 17 and a detection unit. The test wheel-side reducer 9 and the companion test wheel-side reducer 6 are symmetrically arranged about the center line of the cross coupling 8, and their planetary ends are respectively connected to the two bearing seats 7, and the opposite ends of the two bearing seats 7 are both connected to the cross coupling 8. The test wheel-side reducer 9 is connected to one end of the input-end speed torque sensor 3 through a telescopic transmission shaft 5, and the other end of the input-end speed torque sensor 3 is connected to the speed regulating motor 1. The companion test wheel-side reducer 6 is connected to one end of the output-end speed torque sensor 18 through the telescopic transmission shaft 5, and the other end of the output-end speed torque sensor 18 is connected to the loading motor 17. The detection units are respectively arranged on the test wheel-side reducer 9 and the companion test wheel-side reducer 6 to monitor the performance parameters of the test wheel-side reducer 9 and the companion test wheel-side reducer 6.

[0034] Specifically, the input and output ends of the test wheel-side reducer 9 and the accompanying test wheel-side reducer 6 in this embodiment are both vertically arranged, and the test wheel-side reducer 9 and the accompanying test wheel-side reducer 6 are both connected to the cross coupling 8 through the bearing seat 7, and are symmetrically arranged about the center line of the cross coupling 8. The cross coupling 8 transmits torque through the physical structure of "cross interlocking", and its centering accuracy is guaranteed by the processing accuracy, which can not only improve the assembly efficiency, but also further improve the centering accuracy, and solve the problem of low centerline centering accuracy in the wheel-side reducer support test method, and the two wheel-side reducers are connected to the speed torque sensor through the telescopic transmission shaft 5. When the test bench is built, the telescopic transmission shaft 5 is installed last, which can make up for the center axis offset error of each component during the installation process, and can be within an effective range. The connection between the various components of the test bench is realized within the range, which reduces the difficulty of building the test bench and improves work efficiency. At the same time, both reducers are connected with speed and torque sensors. By real-time monitoring of the speed and torque of the speed and torque sensors, it can be found that the speed and loading torque are turbulent within a certain range during the test. By performing deviation detection on the data obtained by real-time monitoring, the dynamic changes of the speed control motor 1 and the loading motor 17 are automatically guided, and the accuracy of the performance detection of the wheel-side reducer is further improved. The performance parameters of the test wheel-side reducer 9 and the accompanying test wheel-side reducer 6 are monitored by the detection unit, and real-time monitoring of various data in the test is realized. At the same time, the speed and torque of the power source input are corrected in time according to the data feedback, which makes up for the data fluctuation deviation in the test process and improves the accuracy of the test data.

[0035] The wheel-side reducer performance detection test bench provided in this embodiment has wide versatility. It only needs to design a universal test bench and select a speed regulating motor 1 and a loading motor 17 with a suitable power and speed range according to the parameter (speed and power) range of the wheel-side reducer or a reducer of similar type, so as to complete the performance detection test of the wheel-side reducer or a reducer of similar type within the corresponding range.

[0036] Furthermore, the detection unit includes a high-speed vibration acceleration sensor 15, a planetary vibration acceleration sensor 16 and a temperature sensor 14, so as to monitor the vibration data of the test wheel reducer 9 and the companion test wheel reducer 6 and the temperature of the planetary lubricating oil therein respectively. The specifications and installation positions of the temperature sensors 14 arranged inside the test wheel reducer 9 and the companion test wheel reducer 6 are the same, and the temperature, brand and oil quantity of the lubricating oil used by the test wheel reducer 9 and the companion test wheel reducer 6 are the same. Specifically, the data collected by the detection unit can reflect the test status in time, but data fluctuations often occur during the test process, and these data collection points will affect the detection accuracy. Therefore, the speed and torque data collected by the input speed torque sensor 3 are judged for deviation. If the deviation between the actual collected data and the theoretical data at a certain moment is greater than the deviation limit, the speed regulating motor 1 and the loading motor 17 are adjusted in time to realize dynamic control of the data and improve the accuracy of the detection result.

[0037] Among them, two temperature sensors 14 are respectively arranged on the test wheel reducer 9 and the companion test wheel reducer 6, and the two temperature sensors 14 are respectively arranged on the high-speed stage and the low-speed stage of the test wheel reducer 9 and the companion test wheel reducer 6. Specifically, the space connecting the high-speed stage and the low-speed stage of the wheel reducer is relatively small, so that the temperature difference between the high-speed stage and the low-speed stage is relatively large. By respectively arranging the temperature sensors 10 on the high-speed stage and the low-speed stage of the wheel reducer, the oil temperature in the high-speed stage and the low-speed stage cavity is monitored to prevent the occurrence of oil seal damage, oil leakage, gear bonding, etc. due to overheating of the oil temperature during the test.

[0038] To ensure the accuracy of the experimental results, the test wheel reducer 9 and the companion wheel reducer 6 have the same structure and specifications, and both include the same internal gears, bearings and connectors.

[0039] In order to achieve the stability of each component, the high-speed end faces of the test wheel-side reducer 9 and the companion test wheel-side reducer 6 are fixed by the wheel-side reducer bracket 12, and the wheel-side reducer bracket 12 is set on the test bench. The two bearing seats 7 are fixed by the bearing seat bracket 13. It also includes a transition connection device 4, a connecting plate 2, a speed torque sensor bracket 11 and a motor bracket 10. The transition connection device 4 is arranged between the two telescopic transmission shafts 5 and the input end speed torque sensor 3 and the output end speed torque sensor 18. The connecting plate 2 is arranged between the input end speed torque sensor 3 and the output end speed torque sensor 18 and the speed regulating motor 1 and the loading motor 17. The input end speed torque sensor 3 and the output end speed torque sensor 18 are both arranged on the speed torque sensor bracket 11, and the speed regulating motor 1 and the loading motor 17 are both arranged on the motor bracket 10.

[0040] Reference Figure 2As shown, the second aspect of the present invention provides a test method for a wheel reducer performance test bench, which is completed based on the wheel reducer performance test bench described in any of the above embodiments, and includes the following steps:

[0041] S1, start the speed regulating motor 1 for trial operation, and ensure that the speed reaches the rated speed to ensure normal operation;

[0042] S2. Set the speed of the speed regulating motor 1 and the torque of the loading motor 17, and perform no-load test, efficiency test, temperature rise test, overload test and overspeed test in sequence. The no-load test refers to testing the test wheel reducer 9 at the rated speed and without load, and observing whether there is any obvious abnormal sound during the test. Usually, the forward and reverse rotations are operated for 1 hour each. The efficiency test refers to loading step by step at 25%, 50%, 75%, and 100% of the rated power, and the duration is usually 60 minutes. The oil temperature is controlled below 90°C, and the temperature is kept at 40°C. The rise test is conducted at rated power. There is no limit on the test duration. The requirement is that the temperature rise cannot change by more than 2°C within 1 hour, that is, thermal equilibrium is reached. The overload test refers to the test at 125% of the rated load, and the overspeed test refers to the test at 130% of the rated speed. Of course, during the test, the oil temperature must not exceed 90°C, the reducer runs smoothly without obvious abnormal noise, the reducer noise value is lower than 80dB(A), the connectors and fasteners are not allowed to loosen, and there must be no oil leakage at the seals and joints.

[0043] S3, real-time monitoring of the speed and torque of the input speed torque sensor 3, when the relative error is greater than the set value, the speed regulating motor 1 and the loading motor 17 are cyclically regulated to ensure that the relative error is less than 0.5%;

[0044] S4. During the stage test, relevant data are recorded and saved regularly. The torque value collected by the input end speed torque sensor 3 is Τ1, and the speed value is n1. The torque value collected by the output end speed torque sensor 18 is T2, and the speed value is n2. The number of collected data is K groups. The average power of the input end speed torque sensor 3 and the output end speed torque sensor 18 is:

[0045]

[0046] The average speed of the input end speed torque sensor 3 and the output end speed torque sensor 18 is:

[0047]

[0048] The working efficiency of the test wheel reducer 9 and the accompanying test wheel reducer 6 is obtained as follows:

[0049]

[0050] S5, the detection unit collects the acceleration response signal of the test wheel reducer 9, analyzes the signal data, obtains the frequency domain response signal of the test wheel reducer 9, and completes the dynamic performance quality evaluation of the test wheel reducer 9;

[0051] S6. The detection unit collects the lubricating oil temperature of the test wheel reducer 9 and obtains a trend diagram of the lubricating oil temperature with time and power factor, which serves as a basis for evaluating the performance of the wheel reducer.

[0052] It should be noted that, in this article, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0053] The above description is only a specific embodiment of the present invention, so that those skilled in the art can understand or implement the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments described herein, but should conform to the widest scope consistent with the principles and novel features invented herein.

Claims

1. A wheel reducer performance test bench, characterized in that: The invention comprises a cross coupling (8), two bearing seats (7), a test wheel reducer (9), a companion test wheel reducer (6), an input end speed torque sensor (3), an output end speed torque sensor (18), a speed regulating motor (1), a loading motor (17) and a detection unit, wherein the test wheel reducer (9) and the companion test wheel reducer (6) are symmetrically arranged about the center line of the cross coupling (8), and the planetary ends thereof are respectively connected to the two bearing seats (7), and the opposite ends of the two bearing seats (7) are both connected to the cross coupling (8), and the test wheel reducer (9) is connected to the test wheel reducer (9) via a telescopic transmission shaft. (5) is connected to one end of the input end speed torque sensor (3), the other end of the input end speed torque sensor (3) is connected to the speed regulating motor (1), the accompanying test wheel side reducer (6) is connected to one end of the output end speed torque sensor (18) through the telescopic transmission shaft (5), the other end of the output end speed torque sensor (18) is connected to the loading motor (17), and the detection unit is respectively arranged on the test wheel side reducer (9) and the accompanying test wheel side reducer (6) to monitor the performance parameters of the test wheel side reducer (9) and the accompanying test wheel side reducer (6).

2. The wheel reducer performance test bench according to claim 1 is characterized in that: The detection unit comprises a high-speed vibration acceleration sensor (15), a planetary vibration acceleration sensor (16) and a temperature sensor (14) to respectively monitor the vibration data of the test wheel reducer (9) and the companion test wheel reducer (6) and the temperature of the planetary lubricating oil therein; The specifications and installation positions of the temperature sensors (14) arranged inside the test wheel reducer (9) and the companion test wheel reducer (6) are the same, and the temperature, brand and oil quantity of the lubricating oil used in the test wheel reducer (9) and the companion test wheel reducer (6) are the same.

3. The wheel reducer performance test bench according to claim 2 is characterized in that: The test wheel reducer (9) and the companion test wheel reducer (6) are respectively provided with two temperature sensors (14), and the two temperature sensors (14) are respectively provided on the high speed stage and the low speed stage of the test wheel reducer (9) and the companion test wheel reducer (6).

4. The wheel reducer performance test bench according to claim 1 is characterized in that: The test wheel reducer (9) and the companion test wheel reducer (6) have the same structure and specifications, and both include the same internal gears, bearings and connecting parts.

5. The wheel reducer performance test bench according to claim 1 is characterized in that: The high-speed end faces of the test wheel reducer (9) and the accompanying test wheel reducer (6) are both fixed by a wheel reducer bracket (12), and the wheel reducer bracket (12) is arranged on the test table.

6. The wheel reducer performance test bench according to claim 1 is characterized in that: The invention also comprises a transition connection device (4), a connection plate (2), a speed torque sensor bracket (11) and a motor bracket (10); the transition connection device (4) is arranged between the two telescopic transmission shafts (5) and the input speed torque sensor (3) and the output speed torque sensor (18); the connection plate (2) is arranged between the input speed torque sensor (3) and the output speed torque sensor (18) and the speed regulating motor (1) and the loading motor (17); the input speed torque sensor (3) and the output speed torque sensor (18) are both arranged on the speed torque sensor bracket (11); and the speed regulating motor (1) and the loading motor (17) are both arranged on the motor bracket (10).

7. A test method for a wheel reducer performance test bench, based on the wheel reducer performance test bench according to any one of claims 1 to 6, characterized in that: The following steps are involved: S1, starting the speed regulating motor (1) for trial operation, and ensuring that the speed reaches the rated speed to ensure normal operation; S2, setting the rotation speed of the speed regulating motor (1) and the torque of the loading motor (17), and sequentially performing a no-load test, an efficiency test, a temperature rise test, an overload test, and an overspeed test; S3, real-time monitoring of the speed and torque of the input-end speed and torque sensor (3), when the relative error is greater than a set value, cyclically regulating the speed regulating motor (1) and the loading motor (17) to ensure that the relative error is less than 0.5%; S4. During the stage test, relevant data are recorded and saved at regular intervals. The torque value collected by the input end speed torque sensor (3) is T1, and the speed value is n1. The torque value collected by the output end speed torque sensor (18) is T2, and the speed value is n2. The number of collected data is K groups. The average power of the input end speed torque sensor (3) and the output end speed torque sensor (18) is: The average speed of the input end speed torque sensor (3) and the output end speed torque sensor (18) is: The working efficiency of the test wheel reducer (9) and the accompanying test wheel reducer (6) is obtained as follows: S5, the detection unit collects the acceleration response signal of the test wheel reducer (9), analyzes the signal data, obtains the frequency domain response signal of the test wheel reducer (9), and completes the dynamic performance quality evaluation of the test wheel reducer (9); S6. The detection unit collects the lubricating oil temperature of the test wheel reducer (9) to obtain a trend diagram of the influence of the lubricating oil temperature on time and power factor.

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