A stepless loading mechanical power closed test platform

Abstract

The application relates to a stepless loading mechanical power closed test platform, and relates to a mechanical power closed test platform.The application is used for solving the problems of high cost, large power consumption and poor economy of the existing gear closed test platform in the full-load long-time performance test of the gear box under heavy load and high power.The loading gear support device of the application is installed in a test gear box (22) of a mechanical power closed system, a hydraulic loading system is connected with the test gear box (22), the power of a test gear box (1) of the mechanical power closed system is steplessly loaded by the hydraulic loading system, the test power required by the test gear box (1) is only circulated in the mechanical power closed system, and a motor (7) of the mechanical power closed system only needs to overcome the frictional power consumption of the whole test platform.The application adopts the hydraulic loading mode, can realize stepless loading, and is stable and free of impact.The application is used for the gear box power closed test.

Description

Technical Field

[0001] This invention relates to a closed test platform, specifically a continuously variable mechanical power closed test platform. Background Technology

[0002] Gear transmission is an important form of power transmission, playing a vital role in the automotive, shipbuilding, aerospace, aviation, and chemical industries. With technological advancements and increasing demands, the power transmitted by gears is gradually increasing, and their operating speeds are rising. From the perspective of gearbox testing methods, based on the different driving and loading methods, there are separate test benches and closed power flow test benches.

[0003] An open test bench consists of a power source (motor), a test gearbox, and a power-consuming device. The power of these components must be equal to the power of the test gearbox. As the test power increases, the cost and scale of the test bench will increase exponentially. Therefore, this test method is generally only suitable for no-load testing or load testing of small gearboxes.

[0004] A closed power flow test bench connects the test gearbox and the auxiliary gearbox in a certain way to form a closed state. A loading device is connected in series in the closed system to load the test gearbox. During the test, the closed power inside the test gearbox can reach full load, while the driving power only needs to overcome the frictional power loss of the closed system of the gearbox.

[0005] For example, the utility model patent with announcement number CN204988721U, entitled "Gear Enclosed Test Bench," describes a first gear transmission box and a second gear transmission box that are structurally identical, including transmission ratio, center distance, and number of teeth. The first gear transmission box, the second gear transmission box, the test gearbox, and the hydraulic loader are sequentially connected to form a closed mechanical system to achieve internal power circulation. The output shaft of the drive motor is connected to another input shaft of the first gear transmission box via a transmission belt to supplement power to the closed mechanical system. The main unit of this test bench loads the test piece through a mechanically enclosed loading method, and the drive motor is used to overcome the system's frictional torque, driving the test piece to rotate. However, for heavy-duty, high-power gearbox full-load long-term performance tests, this test platform suffers from high cost, high power consumption, and poor economic efficiency.

[0006] In summary, existing gear enclosed test benches suffer from high cost, high power consumption, and poor economic efficiency when conducting long-term performance tests on heavy-duty, high-power gearboxes under full load. Summary of the Invention

[0007] The purpose of this invention is to address the problems of high cost, high power consumption, and poor economic efficiency in existing gear closed test benches for long-term performance testing of heavy-duty, high-power gearboxes under full load. Therefore, this invention provides a continuously variable loading mechanical power closed test platform.

[0008] The technical solution of the present invention is as follows: A continuously variable loading mechanical power closed test platform includes a mechanical power closed system, a hydraulic loading system, and a loading gear support device. The loading gear support device is installed in the test gearbox of the mechanical power closed system. The hydraulic loading system is connected to the test gearbox. The power of the test gearbox of the mechanical power closed system is continuously loaded by the hydraulic loading system. The test power required by the test gearbox circulates only within the mechanical power closed system. The motor of the mechanical power closed system only needs to overcome the frictional power consumption of the entire test platform.

[0009] Furthermore, the mechanical power closed system includes a test gearbox, a connecting shaft section, a test gearbox, a motor, and a torque measuring instrument. The test gearbox is connected to one output end of the test gearbox via the connecting shaft section, the motor is connected to the input end of the test gearbox, the other output end of the test gearbox is connected to the test gearbox via the connecting shaft section, and the torque measuring instrument is installed on the connecting shaft section between the other output end of the test gearbox and the test gearbox.

[0010] Furthermore, the connecting shaft section includes a first set of connecting shaft sections, a second set of connecting shaft sections, and a second coupling. The first set of connecting shaft sections and the second set of connecting shaft sections are arranged in parallel and are both connected to the test gearbox and the auxiliary test gearbox. The motor is connected to the input end of the auxiliary test gearbox through the second coupling.

[0011] Furthermore, the first set of connecting shaft segments includes a first coupling and a support base. One end of the first coupling is connected to the test gearbox, and the other end of the first coupling is connected to an output end of the auxiliary gearbox. The support base is mounted on the first coupling.

[0012] Furthermore, the second set of connecting shaft sections includes a third coupling and a fourth coupling. One end of the third coupling is connected to the other output end of the test gearbox, and the other end of the third coupling is connected to one end of the torque measuring instrument. One end of the fourth coupling is connected to the other end of the torque measuring instrument, and the other end of the fourth coupling is connected to the test gearbox.

[0013] Furthermore, the loading gear support device includes an outer blade shaft, a first connecting end plate, an inner blade gear, a second connecting end plate, a locking plate, and an end cover. The outer blade shaft is mounted on the lower housing of the test gearbox, and one end of the outer blade shaft is connected to a second coupling. The other end of the outer blade shaft is connected to one end of the second connecting end plate. A locking plate is installed on the other end of the second connecting end plate. The end cover is installed on the outside of the second connecting end plate. The inner blade gear and the outer blade shaft are fitted together in the circumferential direction to achieve unidirectional loading, or the inner blade gear and the outer blade shaft mesh to achieve forward and reverse loading. The first connecting end plate is mounted on the outer blade shaft and forms a loading area between it and the second connecting end plate. The inner blade gear and the outer blade shaft are located within the loading area. The hydraulic oil of the hydraulic loading system enters the loading area through the second connecting end plate. The upper housing cover of the test gearbox is mounted on the lower housing.

[0014] Furthermore, the loading gear support device also includes a locating ring and a rolling bearing, which are mounted on the second connecting end plate.

[0015] Furthermore, the loading gear support device also includes a locking nut, and the locking plate is mounted on the second connecting end plate via the locking nut.

[0016] Furthermore, the hydraulic loading system includes a hydraulic station and a hydraulic plug. The hydraulic plug is installed on the second connecting end plate, and the hydraulic oil of the hydraulic station is connected to the hydraulic plug through a pipeline.

[0017] Furthermore, the second connecting end plate has a main hydraulic channel along its axial direction and multiple vertical hydraulic channels along its radial direction. One end of each of the multiple vertical hydraulic channels is connected to the main hydraulic channel in the circumferential direction. The second connecting end plate also has multiple sub-hydraulic channels along its axial direction. The other end of each vertical hydraulic channel is connected to one end of a sub-hydraulic channel, and the other end of the sub-hydraulic channel is connected to the loading area.

[0018] Compared with the prior art, the present invention has the following advantages:

[0019] 1. This invention adopts a closed mechanical power type for performance testing of gearboxes, especially heavy-duty gearboxes, under full speed and full load conditions. The power of the drive device is only used to overcome the frictional power consumption of the test platform. The gearbox test power is loaded by a hydraulic loading system, which can achieve stepless loading, smooth loading without impact, clear principle and simple structure.

[0020] 2. This invention uses a hydraulic loading method, which can achieve stepless loading and smooth loading without impact.

[0021] 3. The power consumption of the driving device of this invention is relatively low, and it only needs to overcome the frictional power consumption of the test platform. It is low in cost and economical.

[0022] 4. This invention is applicable to full-load performance testing of heavy-duty, high-power gearboxes, especially for batch products.

[0023] 5. This invention achieves arbitrary unidirectional loading by tightly fitting the outer blades of the outer blade shaft with the inner blades of the corresponding inner blade gear along the circumferential direction. The loading direction can be selected according to the application requirements, based on the plane where the outer blades of the outer blade shaft and the inner blades of the corresponding inner blade gear are fitted. Furthermore, this invention achieves bidirectional loading by placing the outer blades of the blade shaft at any position between the inner blades of the corresponding inner blade gear. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0025] Figure 2 This is a schematic diagram of the transmission principle of the present invention. Detailed Implementation

[0026] Specific implementation method one: Combining Figure 1 and Figure 2 This embodiment describes a continuously variable loading mechanical power closed test platform, which includes a mechanical power closed system, a hydraulic loading system, and a loading gear support device.

[0027] The loading gear support device is installed in the test gearbox 22 of the mechanical power closed system. The hydraulic loading system is connected to the test gearbox 22. The power of the test gearbox 1 of the mechanical power closed system is continuously loaded by the hydraulic loading system. The test power required by the test gearbox 1 circulates only within the mechanical power closed system. The motor 7 of the mechanical power closed system only needs to overcome the frictional power consumption of the entire test platform.

[0028] This embodiment provides a continuously variable loading mechanical power closed test platform for performance testing of gearboxes, especially heavy-duty gearboxes, under full speed and full load conditions. It solves the problem that open test platforms for gearboxes generally require the same power for the load and power-consuming equipment, especially addressing the prominent issues of high cost, high power consumption, and poor economy of test platforms during long-term full-load performance testing of heavy-duty, high-power gearboxes.

[0029] This embodiment adopts a hydraulic loading method. By adjusting the oil supply pressure of the hydraulic station 4, torque can be applied under any working condition to achieve stepless loading.

[0030] Specific Implementation Method Two: Combining Figure 1This embodiment describes a mechanical power closed system comprising a test gearbox 1, a connecting shaft section, a test gearbox 22, a motor 7, and a torque measuring instrument 20. The test gearbox 1 is connected to one output end of the test gearbox 22 via the connecting shaft section. The motor 7 is connected to the input end of the test gearbox 22. The other output end of the test gearbox 22 is connected to the test gearbox 1 via the connecting shaft section. The torque measuring instrument 20 is mounted on the connecting shaft section between the other output end of the test gearbox 22 and the test gearbox 1.

[0031] In this embodiment, the test platform is driven by an electric motor 7. The test power required by the test gearbox 1 circulates only within the closed mechanical power system, and the electric motor 7 only needs to overcome the frictional power consumption of the entire test platform.

[0032] Other components and connections are the same as in Specific Implementation Method 1.

[0033] Specific implementation method three: Combining Figure 1 This embodiment describes a connecting shaft configuration comprising a first set of connecting shaft segments, a second set of connecting shaft segments, and a second coupling 6. The first and second sets of connecting shaft segments are arranged in parallel and both are connected to the test gearbox 1 and the auxiliary gearbox 22. The motor 7 is connected to the input end of the auxiliary gearbox 22 via the second coupling 6. This configuration facilitates the connection between the test gearbox 1 and the auxiliary gearbox 22 and ensures more accurate power transmission. Other components and connections are the same as in specific embodiments one or two.

[0034] Specific implementation method four: Combination Figure 1 This embodiment describes a first set of connecting shaft segments comprising a first coupling 2 and a support base 3. One end of the first coupling 2 is connected to the test gearbox 1, and the other end is connected to an output end of the auxiliary gearbox 22. The support base 3 is mounted on the first coupling 2. This configuration addresses the issue of excessively long shaft segments by adding a support base 3 to the long first coupling 2. Other components and connections are the same as in specific embodiments one, two, or three.

[0035] Specific Implementation Method Five: Combining Figure 1 In this embodiment, the second set of connecting shaft segments includes a third coupling 19 and a fourth coupling 21. One end of the third coupling 19 is connected to the other output end of the test gearbox 22, and the other end of the third coupling 19 is connected to one end of the torque measuring instrument 20. One end of the fourth coupling 21 is connected to the other end of the torque measuring instrument 20, and the other end of the fourth coupling 21 is connected to the test gearbox 1.

[0036] This configuration facilitates the connection between the test gearbox 1 and the auxiliary gearbox 22. Other components and connections are the same as in specific embodiments one, two, three, or four.

[0037] Specific Implementation Method Six: Combination Figure 1 This embodiment describes a loading gear support device comprising an outer blade shaft 8, a first connecting end plate 9, an inner blade gear 10, a second connecting end plate 11, a locking plate 14, and an end cover 17.

[0038] The outer blade shaft 8 is mounted on the lower housing 16 of the test gearbox 22, and one end of the outer blade shaft 8 is connected to the second coupling 6. The other end of the outer blade shaft 8 is connected to one end of the second connecting end plate 11. The other end of the second connecting end plate 11 is equipped with a locking piece 14. The end cover 17 is mounted on the outside of the second connecting end plate 11. The inner blade gear 10 and the outer blade shaft 8 are fitted together in the circumferential direction to achieve unidirectional loading, or the inner blade gear 10 and the outer blade shaft 8 are meshed to achieve forward and reverse loading. The first connecting end plate 9 is mounted on the outer blade shaft 8 and forms a loading area between it and the second connecting end plate 11. The inner blade gear 10 and the outer blade shaft 8 are located in the loading area. The hydraulic oil of the hydraulic loading system enters the loading area through the second connecting end plate 11. The upper housing 5 of the test gearbox 22 is covered on the lower housing 16.

[0039] This configuration facilitates the provision of power, enabling loading tests to be conducted inside the test gearbox. Other components and connections are the same as in specific implementation methods one, two, three, four, or five.

[0040] Specific implementation method seven: Combination Figure 1 This embodiment further includes a positioning ring 12 and a rolling bearing 13, which are mounted on the second connecting end plate 11. This arrangement facilitates the positioning of the rolling bearing 13, and the installation of the rolling bearing 13 ensures smoother rotation of the entire second connecting end plate 11. Other components and connections are the same as in specific embodiments one, two, three, four, five, or six.

[0041] Specific implementation method eight: Combination Figure 1 This embodiment further includes a locking nut 15, through which the locking plate 14 is mounted on the second connecting end plate 11. This configuration provides a simple and reliable connection method for the locking plate, facilitating assembly and disassembly. Other components and connections are the same as in specific embodiments one, two, three, four, five, six, or seven.

[0042] Specific Implementation Method Nine: Combining Figure 1This embodiment describes a hydraulic loading system comprising a hydraulic power unit 4 and a hydraulic plug 18. The hydraulic plug 18 is mounted on the second connecting end plate 11, and the hydraulic oil from the hydraulic power unit 4 is connected to the hydraulic plug 18 via a pipeline. This configuration facilitates the flow of hydraulic oil and enables stepless loading. Other components and connections are the same as in any of the specific embodiments one through eight.

[0043] Specific Implementation Method Ten: Combining Figure 1 In this embodiment, the second connecting end plate 11 has a main hydraulic channel along its axial direction and multiple vertical hydraulic channels along its radial direction. One end of each of the multiple vertical hydraulic channels is connected to the main hydraulic channel in the circumferential direction. The second connecting end plate 11 also has multiple branch hydraulic channels along its axial direction. The other end of each vertical hydraulic channel is connected to one end of a branch hydraulic channel, and the other end of the branch hydraulic channel is connected to the loading area. With this configuration, the hydraulic oil from the hydraulic station 4 enters the test gearbox 22 through the hydraulic plug 18, passes through the main hydraulic channel, vertical hydraulic channel, and branch hydraulic channels of the second connecting end plate 11, and reaches the sealed cavity (referring to the loading area) formed by the inner blade of the inner blade gear 10 and the outer blade of the outer blade shaft 8, respectively. This increases the oil supply pressure in the hydraulic station 4, causing the outer blade of the outer blade shaft 8 and the inner blade of the inner blade gear 10 to rotate relative to each other in a circumferential manner, thus achieving loading. Other components and connections are the same as in any one of the specific embodiments one to nine.

[0044] Combination Figure 1 and Figure 2 Explanation of the working principle of this invention:

[0045] This invention adopts a mechanically closed power design and uses hydraulic loading, which can achieve stepless loading under any working condition. It is used for performance testing of gearboxes, especially heavy-duty gearboxes, under full speed and full load conditions. It solves the problem that the load and power-consuming equipment of open gearbox test platforms generally need to have the same power, especially the prominent problems of high cost, high power consumption and poor economy of test platforms when conducting full load and long-term performance testing of heavy-duty and high-power gearboxes.

[0046] Working principle 1: By tightly fitting the outer blade of the outer blade shaft with the inner blade of the corresponding inner blade gear along the circumferential direction, arbitrary unidirectional loading can be achieved. The loading direction can be selected according to the application requirements, which is the plane where the outer blade of the outer blade shaft and the inner blade of the corresponding inner blade gear are fitted.

[0047] Working principle 2: By placing the outer blades of the blade shaft at any position between the inner blades of the corresponding inner blade gear 10, bidirectional loading in both directions can be achieved.

[0048] While the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the invention. Those skilled in the art can make other changes within the spirit of the invention and apply it to fields not mentioned in the invention. Of course, all such changes made in accordance with the spirit of the invention should be included within the scope of protection claimed by the invention.

Claims

1. A continuously variable mechanical power closed test platform, characterized in that: It includes a mechanical power enclosure system, a hydraulic loading system, and a loading gear support device. The loading gear support device is installed in the test gearbox (22) of the mechanical power closed system. The hydraulic loading system is connected to the test gearbox (22). The power of the test gearbox (1) of the mechanical power closed system is continuously loaded by the hydraulic loading system. The test power required by the test gearbox (1) only circulates within the mechanical power closed system. The motor (7) of the mechanical power closed system only needs to overcome the frictional power consumption of the entire test platform. The loading gear support device includes an outer blade shaft (8), a first connecting end plate (9), an inner blade gear (10), a second connecting end plate (11), a locking plate (14), and an end cover (17). The outer blade shaft (8) is installed on the lower housing (16) of the test gearbox (22), and one end of the outer blade shaft (8) is connected to the second coupling (6), and the other end of the outer blade shaft (8) is connected to one end of the second connecting end plate (11). The other end of the second connecting end plate (11) is equipped with a locking piece (14), and the end cover (17) is installed on the outside of the second connecting end plate (11). The inner blade gear (10) and the outer blade shaft (8) are fitted together in the circumferential direction to achieve unidirectional loading, or the inner blade gear (10) and the outer blade shaft (8) mesh to achieve forward and reverse loading. The first connecting end plate (9) is installed on the outer blade shaft (8) and forms a loading area between it and the second connecting end plate (11). The inner blade gear (10) and the outer blade shaft (8) are located in the loading area. The hydraulic oil of the hydraulic loading system enters the loading area through the second connecting end plate (11). The upper housing (5) of the test gearbox (22) is covered on the lower housing (16).

2. The continuously variable loading mechanical power closed test platform according to claim 1, characterized in that: The mechanical power closed system includes a test gearbox (1), a connecting shaft section, a test gearbox (22), a motor (7), and a torque measuring instrument (20). The test gearbox (1) is connected to one output end of the test gearbox (22) through the connecting shaft section. The motor (7) is connected to the input end of the test gearbox (22). The other output end of the test gearbox (22) is connected to the test gearbox (1) through the connecting shaft section. The torque measuring instrument (20) is installed on the connecting shaft section between the other output end of the test gearbox (22) and the test gearbox (1).

3. The continuously variable loading mechanical power closed test platform according to claim 2, characterized in that: The connecting shaft section includes a first set of connecting shaft sections, a second set of connecting shaft sections, and a second coupling (6). The first set of connecting shaft sections and the second set of connecting shaft sections are arranged in parallel and are both connected to the test gearbox (1) and the auxiliary gearbox (22). The motor (7) is connected to the input end of the auxiliary gearbox (22) through the second coupling (6).

4. The continuously variable loading mechanical power closed test platform according to claim 3, characterized in that: The first set of connecting shaft segments includes a first coupling (2) and a support base (3). One end of the first coupling (2) is connected to the test gearbox (1), and the other end of the first coupling (2) is connected to one output end of the test gearbox (22). The support base (3) is supported and installed on the first coupling (2).

5. The continuously variable loading mechanical power closed test platform according to claim 4, characterized in that: The second set of connecting shaft sections includes a third coupling (19) and a fourth coupling (21). One end of the third coupling (19) is connected to the other output end of the test gearbox (22), and the other end of the third coupling (19) is connected to one end of the torque measuring instrument (20). One end of the fourth coupling (21) is connected to the other end of the torque measuring instrument (20), and the other end of the fourth coupling (21) is connected to the test gearbox (1).

6. The continuously variable loading mechanical power closed test platform according to claim 5, characterized in that: The loading gear support device also includes a positioning ring (12) and a rolling bearing (13), which are mounted on the second connecting end plate (11).

7. The continuously variable loading mechanical power closed test platform according to claim 6, characterized in that: The loading gear support device also includes a locking nut (15), and the locking plate (14) is mounted on the second connecting end plate (11) by means of the locking nut (15).

8. The continuously variable loading mechanical power closed test platform according to claim 7, characterized in that: The hydraulic loading system includes a hydraulic station (4) and a hydraulic plug (18). The hydraulic plug (18) is installed on the second connecting end plate (11). The hydraulic oil of the hydraulic station (4) is connected to the hydraulic plug (18) through a pipeline.

9. The continuously variable loading mechanical power closed test platform according to claim 8, characterized in that: The second connecting end plate (11) has a main hydraulic channel along its axial direction and multiple vertical hydraulic channels along its radial direction. One end of each of the multiple vertical hydraulic channels is connected to the main hydraulic channel in the circumferential direction. The second connecting end plate (11) also has multiple sub-hydraulic channels along its axial direction. The other end of each vertical hydraulic channel is connected to one end of a sub-hydraulic channel, and the other end of the sub-hydraulic channel is connected to the loading area.

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