A mechanical preloaded power closed test platform

Abstract

A mechanical preload power closed test platform, which relates to a closed test platform. The present invention is intended to solve the problems of high cost, high power consumption and poor economy in the full-load long-term performance test of a high-power and heavy-load gearbox. The mechanical preload device of the present invention is installed in the loading gearbox of the mechanical power closed system; the transmission shaft of the mechanical preload device is passed through the loading gearbox, and the first loading gear and the second loading gear are respectively rotatably sleeved on the transmission shaft; the first loading flange is sleeved on the transmission shaft at the end of the first loading gear, and the second loading flange is sleeved on the outer circumference of one side of the first loading gear, and the first loading flange and the second loading flange are bolted; the first end cover is installed on the end face of one side of the loading gearbox; the positioning ring is installed on the outer end of the second loading gear, and the second end cover is pressed on the positioning ring; the end of the transmission shaft is provided with external teeth, and the tooling is sleeved on the external teeth to realize rotational loading. The present invention is used for preload power closed testing.

Description

Technical Field

[0001] The invention relates to a test platform, in particular to a mechanical preloaded power closed test platform. Background Art

[0002] Gear transmission is an important form of transmission for power transmission, and plays a vital role in the automotive, shipbuilding, aerospace, aviation, chemical and other fields. With the development of science and technology and the increase in usage demand, the power transmitted by gears has gradually increased and the operating speed has gradually increased.

[0003] From the perspective of gearbox testing methods, according to the different driving and loading methods, it is divided into open test bench and closed power flow test bench.

[0004] An open test bench consists of a power source (motor), a speed-changing gearbox, a test gearbox, and a power-consuming device. The power of the power-consuming device must be equal to that of the test gearbox. As the test power increases, the cost and size of the test bench increase exponentially. Therefore, this test method is generally only suitable for no-load tests or loaded tests on small gearboxes.

[0005] The closed power flow test bench connects the test gearbox and the accompanying test gearbox in some form to form a closed state, and connects a loading device in series within the closed system to load the test gearbox. During the test, the closed power inside the test gearbox can reach full load, and the drag power to drive them only needs to overcome the friction power consumption of the gearbox closed system. For the full-load and long-term performance test of heavy-load and high-power gearboxes, if the open test method is used, the power of the power source (motor), speed change gearbox, and power consumption device is equal to the power of the test gearbox; when the closed power flow test method is used, the power of the speed change gearbox and loading device is equal to the power of the test gearbox, and the power of the power source (motor) is generally only a few percent of the power of the test gearbox, which will reduce the construction cost of the test bench.

[0006] In summary, in order to solve the problems of high cost, high power consumption and poor economy in the full-load and long-term performance test of high-power and heavy-load gearboxes, the present invention analyzes the full-load test method of gearboxes, especially high-power and heavy-load gearboxes, and designs a mechanical preloaded power closed test platform. Summary of the Invention

[0007] The present invention aims to solve the problems of high cost, high power consumption and poor economic efficiency in full-load and long-term performance testing of high-power and heavy-duty gearboxes, and further provides a mechanical preloaded power closed test platform.

[0008] The technical solution of the present invention is: a mechanical preload power sealing test platform includes a mechanical power sealing system, which also includes a mechanical preload device, which is installed in the loading gear box of the mechanical power sealing system; wherein the mechanical preload device includes a first end cover, a first loading flange, a locking plate, a diaphragm assembly, a second loading flange, a first loading gear, a second loading gear, a positioning ring, a transmission shaft and a second end cover, the transmission shaft is passed through the loading gear box, the first loading gear and the second loading gear are respectively rotatably sleeved on the transmission shaft and meshed with the gears in the loading gear box; the first loading flange is sleeved on The first loading gear is mounted on the transmission shaft at the end thereof, the second loading flange is sleeved on the outer circumference of one side of the first loading gear, the locking plate and the diaphragm assembly are sleeved on the outer circumference of the end of the second loading flange, the first loading flange and the second loading flange are bolted together and the locking plate and the diaphragm assembly are clamped to complete the preloading of the mechanical power; the first end cover is mounted on one end face of the loading gear box and covers the end of the transmission shaft, the first loading flange and the second loading flange; the positioning ring is mounted on the outer end of the second loading gear, and the second end cover is press-fitted on the positioning ring; the end of the transmission shaft is provided with external teeth, and the tooling is sleeved on the external teeth to realize forward and reverse bidirectional rotation loading.

[0009] Furthermore, a gap is left between the first loading gear and the second loading gear.

[0010] Furthermore, the first loading flange is a stepped flange with unequal inner diameters.

[0011] Furthermore, loading teeth are provided on the outer circumferential surface of the first loading flange located at the minimum inner diameter.

[0012] Furthermore, the mechanical preloading device also includes nuts, bolts and locking nuts. The first loading flange and the second loading flange are connected by nuts and bolts. The locking nut is screwed on the end of the first loading gear and positions the locking plate.

[0013] Furthermore, the mechanical preloading device also includes a positioning flange, an adjusting gasket and a first rolling bearing. The first rolling bearing is mounted on one side of the first loading gear. The positioning flange is installed on the housing of the loading gear box after adjusting its position through the adjusting gasket, and one end of the positioning flange is placed on the outer ring of the first rolling bearing.

[0014] Furthermore, the mechanical preloading device also includes a second rolling bearing, a first retaining ring, a third rolling bearing and a second retaining ring, the second rolling bearing is mounted on the other side of the first loading gear, the third rolling bearing is mounted on one side of the second loading gear, the first retaining ring is mounted on the other side of the first loading gear and is blocked on the inner ring of the second rolling bearing, and the second retaining ring is mounted on one side of the second loading gear and is blocked on the inner ring of the third rolling bearing.

[0015] Furthermore, the mechanical preloading device further includes a fourth rolling bearing, which is sleeved on the other side of the second loading gear, and an outer ring of the fourth rolling bearing is abutted against the positioning ring.

[0016] Furthermore, the mechanical preloading device also includes a first coupling, one end of the first coupling is connected to the loading gearbox of the mechanical power closed system, and the other end of the first coupling is connected to the test gearbox of the mechanical power closed system.

[0017] Furthermore, the mechanical power closed system includes a test gearbox, a second coupling, a torque meter, a third coupling, a loading gearbox, a fourth coupling, a test gearbox, a fifth coupling and an electric motor. The test gearbox and the torque meter are connected through the second coupling, the torque meter and the test gearbox are connected through the third coupling, the loading gearbox and the test gearbox are connected through the fourth coupling, and the output shaft of the electric motor is connected to the input end of the test gearbox through the fifth coupling.

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

[0019] 1. The present invention embeds a mechanical preloading device into a mechanical power-enclosed system. By using a dedicated tooling sleeve to rotate clockwise or counterclockwise, rotational loading is applied to the outer teeth of the transmission shaft, enabling forward and reverse bidirectional loading. The loading torque can be adjusted according to the angle of rotation, thereby enabling testing of heavy-duty gearboxes at full speed and full load under mechanically enclosed working conditions. The power required to drive them (referring to the motor) only needs to overcome the frictional power loss of the gearbox enclosed system. Because the present invention makes minimal changes to existing gearbox testing equipment, it solves the problem of high test platform costs. Moreover, because the motor's power is reduced to a level that overcomes frictional power loss, it solves the problems of high power consumption and poor economic efficiency.

[0020] 2. The present invention adopts a hydraulic loading method during the loading process, which can achieve stepless loading and smooth loading without impact. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a front view of the present invention; Figure 2 It is a partial enlarged view of the loading end; Figure 3 It is an enlarged view of the entire loading section. DETAILED DESCRIPTION

[0022] Specific implementation method 1: Combination Figures 1 to 3The present embodiment is described. A mechanical preload power sealing test platform of the present embodiment includes a mechanical power sealing system, which also includes a mechanical preload device, which is installed in the loading gear box 5 of the mechanical power sealing system; wherein the mechanical preload device includes a first end cover 10, a first loading flange 13, a locking plate 15, a diaphragm assembly 16, a second loading flange 19, a first loading gear 21, a second loading gear 26, a positioning ring 28, a transmission shaft 29 and a second end cover 30, the transmission shaft 29 is provided in the loading gear box 5, the first loading gear 21 and the second loading gear 26 are respectively rotatably sleeved on the transmission shaft 29, and meshed with the gears in the loading gear box 5; the first loading flange 13 is sleeved in the first On the transmission shaft 29 at the end of the loading gear 21, the second loading flange 19 is mounted on the outer circumference of one side of the first loading gear 21, the locking plate 15 and the diaphragm assembly 16 are mounted on the outer circumference of the end of the second loading flange 19, the first loading flange 13 and the second loading flange 19 are bolted together and clamp the locking plate 15 and the diaphragm assembly 16 to complete the preloading of the mechanical power; the first end cover 10 is mounted on one end face of the loading gear box 5 and covers the end of the transmission shaft 29, the first loading flange 13 and the second loading flange 19; the positioning ring 28 is installed on the outer end of the second loading gear 26, and the second end cover 30 is press-fitted on the positioning ring 28; the end of the transmission shaft 29 is provided with external teeth, and the tooling is mounted on the external teeth to realize forward and reverse bidirectional rotation loading.

[0023] The mechanical preloaded power closed test platform of the present invention adopts a mechanical power closed type and a mechanical preload method for loading, which can realize mechanical power closed loading and is used for performance testing of gearboxes, especially heavy-loaded gearboxes under full speed and full load conditions. It solves the problem that the load and power-consuming equipment of the gearbox open test platform generally require the same power, especially the prominent problems of high cost, high power consumption and poor economy of the test platform during full-load and long-term performance testing of heavy-loaded and high-power gearboxes.

[0024] The test power required by the test gearbox of this invention circulates solely within the closed mechanical power system, with the motor only needing to overcome the frictional power losses of the entire test platform. Mechanical power preloading is achieved by rotating the gears on the drive shaft using a dedicated tooling sleeve. Simultaneously, two loading flanges are connected using nuts and bolts. Bidirectional loading can be achieved by rotating the drive shaft clockwise or counterclockwise, and the loading torque can be adjusted based on the angle of rotation.

[0025] Specific implementation method 2: Combination Figure 1 and Figure 3 In this embodiment, a gap is provided between the first loading gear 21 and the second loading gear 26. This arrangement prevents interference between the two during high-speed, full-load rotation. The remaining components and connections are the same as those in the first embodiment.

[0026] Specific implementation method three: Combination Figure 1 and Figure 3 In this embodiment, first loading flange 13 is a stepped flange with unequal inner diameters. This arrangement facilitates connection with second loading flange 19 and ensures operational strength. The remaining components and connections are identical to those in Embodiments 1 or 2.

[0027] Specific implementation method four: Combination Figure 1 and Figure 3 In this embodiment, the first loading flange 13 is provided with loading teeth on its outer circumferential surface with the smallest inner diameter. This arrangement facilitates the application of driving force. The remaining components and connections are identical to those in Embodiments 1, 2, or 3.

[0028] Specific implementation method five: Combination Figures 1 to 3 This embodiment describes a mechanical preloading device that also includes a nut 11, a bolt 12, and a lock nut 13. The first loading flange 13 and the second loading flange 19 are connected via the nut 11 and bolt 12. The lock nut 13 is screwed onto the end of the first loading gear 21 and positions the locking plate 15. This arrangement facilitates quick and removable connection between the first loading flange 13 and the second loading flange 19. The lock nut 13 facilitates positioning of one side of the locking plate 15, while the other side of the locking plate 15 is positioned by a shoulder on the first loading gear 21, ensuring secure installation and reliable high-speed operation. Other components and connections are identical to those in Specific Embodiments 1, 2, 3, or 4.

[0029] Specific implementation method six: combination Figures 1 to 3 This embodiment describes a mechanical preloading device that also includes a positioning flange 17, an adjustment washer 18, and a first rolling bearing 20. The first rolling bearing 20 is mounted on one side of a first loading gear 21. The positioning flange 17 is adjusted using the adjustment washer 18 and then mounted on the housing of the loading gearbox 5. One end of the positioning flange 17 rests on the outer ring of the first rolling bearing 20. This arrangement facilitates axial positioning of the first loading gear 21. The remaining components and connections are identical to those of Embodiments 1, 2, 3, 4, or 5.

[0030] Specific implementation method seven: combination Figure 1 and Figure 3To describe this embodiment, the mechanical preloading device of this embodiment further includes a second rolling bearing 22, a first retaining ring 23, a third rolling bearing 24, and a second retaining ring 25. The second rolling bearing 22 is mounted on the other side of the first loading gear 21, the third rolling bearing 24 is mounted on one side of the second loading gear 26, the first retaining ring 23 is mounted on the other side of the first loading gear 21 and blocks the inner ring of the second rolling bearing 22, and the second retaining ring 25 is mounted on one side of the second loading gear 26 and blocks the inner ring of the third rolling bearing 24. This arrangement facilitates stable and reliable separation of the first loading gear 21 and the second loading gear 26, and ensures that the first loading gear 21 and the second loading gear 26 can rotate reliably on the transmission shaft 29. Other components and connection relationships are the same as those of the first, second, third, fourth, fifth, or sixth embodiments.

[0031] Specific implementation method eight: combination Figures 1 to 3 This embodiment describes a mechanical preloading device that also includes a fourth rolling bearing 27. This fourth rolling bearing 27 is mounted on the other side of the second loading gear 26, with its outer ring abutting against a positioning ring 28. This arrangement ensures the axial positioning of the second loading gear 26. The remaining components and connections are identical to those of Embodiments 1, 2, 3, 4, 5, 6, or 7.

[0032] Specific implementation method nine: combination Figures 1 to 3 To explain this embodiment, the mechanical preloading device also includes a first coupling 31. One end of the first coupling 31 is connected to the loading gearbox 5 of the mechanical power containment system, and the other end of the first coupling 31 is connected to the test gearbox 1 of the mechanical power containment system. This arrangement facilitates connection to the test gearbox. The remaining components and connections are the same as those in any of the first to eighth embodiments.

[0033] Specific implementation method ten: Combination Figure 1 To describe this embodiment, the mechanical power closed system of this embodiment includes a test gearbox 1, a second coupling 2, a torque meter 3, a third coupling 4, a loading gearbox 5, a fourth coupling 6, a test gearbox 7, a fifth coupling 8 and an electric motor 9. The test gearbox 1 and the torque meter 3 are connected via the second coupling 2, the torque meter 3 and the test gearbox 7 are connected via the third coupling 4, the loading gearbox 5 and the test gearbox 7 are connected via the fourth coupling 6, and the output shaft of the electric motor 9 is connected to the input end of the test gearbox 7 via the fifth coupling 8. With this arrangement, the test power required to be loaded on the test gearbox 1 circulates only within the mechanical power closed system. Other components and connection relationships are the same as any one of the specific embodiments one to nine.

[0034] Combine Figures 1 to 3The working principle of the present invention is explained as follows: When the present invention is actually used, an external special tooling sleeve is used to rotate on the outer teeth of the transmission shaft. During rotation, the transmission shaft can be rotated clockwise or counterclockwise according to the test requirements, thereby realizing forward and reverse bidirectional loading; and the size of the loading torque can be adjusted according to the angle of rotation.

[0035] Although the present invention has been disclosed above with reference to preferred embodiments, this is not intended to limit the present invention. Those skilled in the art may also make other changes within the spirit of the present invention, and apply the present invention to fields not mentioned herein. Of course, these changes made in accordance with the spirit of the present invention should be included in the scope of protection claimed by the present invention.

Claims

1. A mechanical preload power sealing test platform, comprising a mechanical power sealing system, characterized in that: It also includes a mechanical preloading device, which is installed in a loading gear box (5) of the mechanical power closed system; The mechanical preloading device comprises a first end cover (10), a first loading flange (13), a locking plate (15), a diaphragm assembly (16), a second loading flange (19), a first loading gear (21), a second loading gear (26), a positioning ring (28), a transmission shaft (29) and a second end cover (30). The transmission shaft (29) is inserted into a loading gear box (5). The first loading gear (21) and the second loading gear (26) are respectively rotatably mounted on the transmission shaft (29) and meshed with gears in the loading gear box (5). The first loading flange (13) is mounted on the transmission shaft (29) at the end of the first loading gear (21), the second loading flange (19) is mounted on the outer circumference of one side of the first loading gear (21), the locking plate (15) and the diaphragm assembly (16) are mounted on the outer circumference of the end of the second loading flange (19), the first loading flange (13) and the second loading flange (19) are bolted together and clamp the locking plate (15) and the diaphragm assembly (16) to complete the preloading of the mechanical power; the first end cover (10) is mounted on the end face of one side of the loading gear box (5) and covers the end of the transmission shaft (29), the first loading flange (13) and the second loading flange (19); the positioning ring (28) is mounted on the outer end of the second loading gear (26), and the second end cover (30) is press-fitted on the positioning ring (28); the end of the transmission shaft (29) is provided with external teeth, and the tooling is mounted on the external teeth to realize forward and reverse bidirectional rotation loading.

2. A mechanical preload power closed test platform according to claim 1, characterized in that: A gap is left between the first loading gear (21) and the second loading gear (26).

3. A mechanical preload power sealing test platform according to claim 1 or 2, characterized in that: The first loading flange (13) is a stepped flange with unequal inner diameters.

4. A mechanical preload power sealing test platform according to claim 3, characterized in that: The first loading flange (13) is provided with loading teeth on its outer circumferential surface with the smallest inner diameter.

5. The mechanical preload power sealing test platform according to claim 4, characterized in that: The mechanical preloading device further comprises a nut (11), a bolt (12) and a locking nut. The first loading flange (13) and the second loading flange (19) are connected via the nut (11) and the bolt (12). The locking nut is screwed onto the end of the first loading gear (21) and positions the locking plate (15).

6. The mechanical preload power sealing test platform according to claim 5, characterized in that: The mechanical preloading device further comprises a positioning flange (17), an adjusting gasket (18) and a first rolling bearing (20). The first rolling bearing (20) is mounted on one side of a first loading gear (21). The positioning flange (17) is mounted on the housing of the loading gear box (5) after adjusting its position by means of the adjusting gasket (18). One end of the positioning flange (17) is mounted on the outer ring of the first rolling bearing (20).

7. The mechanical preload power sealing test platform according to claim 6, characterized in that: The mechanical preloading device further comprises a second rolling bearing (22), a first retaining ring (23), a third rolling bearing (24) and a second retaining ring (25), wherein the second rolling bearing (22) is mounted on the other side of the first loading gear (21), the third rolling bearing (24) is mounted on one side of the second loading gear (26), the first retaining ring (23) is mounted on the other side of the first loading gear (21) and is retained on the inner ring of the second rolling bearing (22), and the second retaining ring (25) is mounted on one side of the second loading gear (26) and is retained on the inner ring of the third rolling bearing (24).

8. The mechanical preload power sealing test platform according to claim 7, characterized in that: The mechanical preloading device further comprises a fourth rolling bearing (27), which is sleeved on the other side of the second loading gear (26), and the outer ring of the fourth rolling bearing (27) is abutted against the positioning ring (28).

9. The mechanical preload power sealing test platform according to claim 8, characterized in that: The mechanical preloading device further comprises a first coupling (31), one end of the first coupling (31) is connected to a loading gearbox (5) of the mechanical power closed system, and the other end of the first coupling (31) is connected to a test gearbox (1) of the mechanical power closed system.

10. A mechanical preload power sealing test platform according to claim 1 or 9, characterized in that: The mechanical power closed system comprises a test gearbox (1), a second coupling (2), a torque meter (3), a third coupling (4), a loading gearbox (5), a fourth coupling (6), a test gearbox (7), a fifth coupling (8) and a motor (9); the test gearbox (1) and the torque meter (3) are connected via the second coupling (2); the torque meter (3) and the test gearbox (7) are connected via the third coupling (4); the loading gearbox (5) and the test gearbox (7) are connected via the fourth coupling (6); and the output shaft of the motor (9) is connected to the input end of the test gearbox (7) via the fifth coupling (8).

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