Device for testing wind resistance loss of planetary gear system

Abstract

The invention provides a wind resistance loss testing device for a planetary gear system. Power of the device is input by a motor at the left end, the motor is connected with an input shaft of a sun gear of an accompanying planetary gear transmission structure through a coupler, and speed transmission is achieved through meshing transmission of the planetary gear transmission structure. And planet carriers of the accompanying planetary gear transmission structure and the tested planetary gear transmission structure are fixedly connected with the support frame. A sun gear and a planet gear in the accompanying planetary gear transmission structure are fixedly connected with a sun gear and a planet gear of the tested planetary gear transmission structure through couplings, and a gear ring is in meshed connection with the sun gear and the planet gear of the tested planetary gear transmission structure through an external straight gear, so that the running speed of each component in the accompanying planetary gear transmission structure is consistent with that of each component in the tested planetary gear transmission structure. According to the wind resistance loss testing device for the planetary gear system, the test box is driven by the accompanying test box, so that the rotating speed of each component can be kept consistent on the premise that a planetary gear transmission structure is not meshed, power loss caused by tooth surface contact, rolling and sliding, bearing friction and the like can be eliminated, and the requirement of wind resistance testing is met.

Description

Technical Field

[0001] The present invention relates to the field of planetary gear transmission systems, and particularly to a wind resistance loss testing device for a planetary gear system. Background Art

[0002] When gears rotate at high speed, a pressure difference is generated between adjacent tooth surfaces under the eddy current effect, forming a resistance moment opposite to the rotation direction. The wind resistance loss testing device is used to test this resistance moment. Traditional testing methods and testing devices are mostly used for single-stage gear pairs, and the method of using a companion wheel to drive the test wheel is adopted to measure the resistance moment of a pair of gear pairs at high speed. With the wide application of planetary gear systems in ultra-high speed scenarios, such as the fields of aviation, aerospace, and ultra-high speed robots, etc. The demand for wind resistance loss testing of planetary gear systems is increasing continuously. Due to the complex composition of components in the planetary gear system and multiple wind resistance test input sources, conventional testing devices are difficult to meet its testing requirements.

[0003] Therefore, there is an urgent need for a new type of wind resistance loss testing device specifically designed for planetary gear systems. Summary of the Invention

[0004] The purpose of the present invention is to provide a wind resistance loss testing device for a planetary gear system to solve the problems existing in the prior art.

[0005] The technical solution adopted to achieve the purpose of the present invention is as follows: A wind resistance loss testing device for a planetary gear system includes a test platform, and a companion planetary gear transmission structure, a test planetary gear transmission structure, a companion box paired spur gear, a test box paired spur gear, a companion planetary gear support, a test planetary gear support, a companion box paired spur gear support, and a test box paired spur gear support arranged on the test platform.

[0006] An input motor and a load motor are provided on both sides of the test platform. A companion planetary gear support, a companion planetary gear transmission structure, a test planetary gear transmission structure, and a test planetary gear support are successively arranged between the input motor and the load motor.

[0007] The companion planetary gear transmission structure includes a sun gear I, a ring gear I, a plurality of planet gears I, and a planet carrier I. A sun gear connecting shaft I is installed in the shaft hole of the sun gear I. The sun gear input shaft I is a stepped shaft with torsional elasticity. A planet gear connecting shaft I is installed in the shaft hole of the planet gear I. The planet carrier I is fixedly connected to the companion planetary gear support. The planet gears I are supported on the planet carrier I through bearings. The plurality of planet gears I are arranged around the sun gear I. The planet gears I mesh with the ring gear I and the sun gear I. The sun gear connecting shaft I transmits power from the input motor to the sun gear I. The sun gear I drives the planet gears I to rotate self. The planet gears I push the ring gear I to rotate.

[0008] There is a mating spur gear for the test box beside the lower side of the accompanying planetary gear transmission structure. The mating spur gear for the test box includes a spur gear I and a power transmission stepped shaft I. The power transmission stepped shaft I is installed in the shaft hole of the spur gear I. The spur gear I is rotationally supported on the mating spur gear bracket for the test box through the power transmission stepped shaft I. The spur gear I meshes with the ring gear I.

[0009] The test planetary gear transmission structure includes a sun gear II, a ring gear II, a plurality of planet gears II and a planet carrier II. The sun gear connecting shaft II is installed in the shaft hole of the sun gear II. The planet gear connecting shaft II is installed in the shaft hole of the planet gear II. The planet carrier II is fixedly connected to the test planetary gear bracket. The planet gears II are supported on the planet carrier II through bearings. The plurality of planet gears II are arranged around the sun gear II. The ring gear II is disengaged from meshing contact with the planet gears II. The sun gear II is disengaged from meshing contact with the planet gears II. The sun gear connecting shaft II is connected to the sun gear connecting shaft I through a coupling. The planet gear connecting shaft II is connected to the planet gear connecting shaft I through a coupling.

[0010] There is a mating spur gear for the test box beside the lower side of the test planetary gear transmission structure. The mating spur gear for the test box includes a spur gear II and a power transmission stepped shaft II. The power transmission stepped shaft II is installed in the shaft hole of the spur gear II. The spur gear II is rotationally supported on the mating spur gear bracket for the test box through the power transmission stepped shaft II. The spur gear II meshes with the ring gear II. The power transmission stepped shaft II is connected to the power output shaft I through a coupling. The spur gear II drives the ring gear II to rotate.

[0011] Furthermore, the sun gear II, the ring gear II and the planet gears II are all made by undercutting treatment.

[0012] Furthermore, the sun gear I and the sun gear connecting shaft I, the planet gear I and the planet gear connecting shaft I, the sun gear II and the sun gear connecting shaft II, the planet gear II and the planet gear connecting shaft II, the spur gear I and the power transmission stepped shaft I, and the spur gear II and the power transmission stepped shaft II are all fixed by flat keys.

[0013] Furthermore, the plurality of planet gears I are 5 planet gears I of the same specification. The planet gears II are 5 planet gears II of the same specification.

[0014] Furthermore, the accompanying planetary gear bracket, the test planetary gear bracket, the mating spur gear bracket for the test box and the mating spur gear bracket for the test box are all connected to the test platform through bolts. The upper surface of the test platform is provided with a T-shaped chute. The head of the bolt is embedded in the chute and can slide along the chute. The rod part of the bolt passes through the base of the accompanying planetary gear bracket, the test planetary gear bracket, the mating spur gear bracket for the test box or the mating spur gear bracket for the test box and is tightened by a nut.

[0015] The present invention also provides a test method according to the above-mentioned wind resistance loss test device for a planetary gear system, comprising the following steps:

[0016] 1) Build a wind resistance loss test device for the planetary gear system.

[0017] 2) Measure the moment of inertia without the gear pair.

[0018] 3) Conduct an unloaded speed decay test.

[0019] 4) Install the test planetary gear transmission structure and measure the moment of inertia. The accompanying test planetary gear transmission structure adjusts the power and speed to the values required by the test planetary gear transmission structure, so as to achieve the same running speed of each component of the accompanying test planetary gear transmission structure and the measured planetary gear transmission structure.

[0020] 5) Conduct a loaded speed decay test.

[0021] 6) Calculate the wind resistance power loss.

[0022] The technical effect of the present invention is beyond doubt: By adopting the form of using an accompanying test box to drive the test box, it is possible to achieve the same rotational speed of each component of the test planetary gear transmission structure without meshing, and also eliminate the power losses caused by tooth surface contact, rolling and sliding, and bearing friction, meeting the requirements of the wind resistance test. Description of the Drawings

[0023] Figure 1 It is a schematic diagram of the overall structure of the test device;

[0024] Figure 2 It is a schematic diagram of the accompanying test planetary gear transmission structure;

[0025] Figure 3 It is a schematic diagram of the test planetary gear transmission structure;

[0026] Figure 4 It is a schematic diagram of the mating spur gears of the accompanying test box;

[0027] Figure 5 It is a schematic diagram of the mating spur gears of the test box;

[0028] Figure 6 It is a simplified transmission diagram of the test device.

[0029] In the figure: the auxiliary test planetary gear transmission structure 1, sun gear I 101, ring gear I 102, planetary gear I 103, planetary gear connecting shaft I 104, sun gear input shaft I 105, planet carrier I 106, test planetary gear transmission structure 2, sun gear II 201, ring gear II 202, planetary gear II 203, planetary gear connecting shaft II 204, sun gear connecting shaft II 205, planet carrier II 206, auxiliary test box mating spur gear 3, spur gear I 301, power transmission stepped shaft I 302, test box mating spur gear 4, spur gear II 401, power transmission stepped shaft II 402. Specific embodiments

[0030] The present invention will be further described below in conjunction with embodiments, but it should not be understood that the above-mentioned subject matter scope of the present invention is limited to the following embodiments. Without departing from the above technical idea of the present invention, various substitutions and changes made according to ordinary technical knowledge and customary means in the art should be included within the protection scope of the present invention.

[0031] Embodiment 1:

[0032] Refer to Figures 1 to 6 , this embodiment provides a wind resistance loss test device for a planetary gear system, including a test platform, and an auxiliary test planetary gear transmission structure 1, a test planetary gear transmission structure 2, an auxiliary test box mating spur gear 3, a test box mating spur gear 4, an auxiliary test planetary gear support, a test planetary gear support, an auxiliary test box mating spur gear support, and a test box mating spur gear support arranged on the test platform.

[0033] Input motors and load motors are provided on both sides of the test platform. An auxiliary test planetary gear support, an auxiliary test planetary gear transmission structure 1, a test planetary gear transmission structure 2, and a test planetary gear support are sequentially arranged between the input motor and the load motor.

[0034] The auxiliary test planetary gear transmission structure 1 includes a sun gear I 101, a ring gear I 102, a plurality of planetary gears I 103, and a planet carrier I 106. A sun gear connecting shaft I 105 is installed in the shaft hole of the sun gear I 101. The sun gear input shaft I 105 is a stepped shaft with torsional elasticity. A planetary gear connecting shaft I 104 is installed in the shaft hole of the planetary gear I 103. The planet carrier I 106 is fixedly connected to the auxiliary test planetary gear support. The planetary gear I 103 is supported on the planet carrier I 106 through bearings. The plurality of planetary gears I 103 are arranged around the sun gear I 101. The planetary gear I 103 meshes with the ring gear I 102 and the sun gear I 101. The sun gear connecting shaft I 105 transmits power from the input motor to the sun gear I 101. The sun gear I 101 drives the planetary gear I 103 to rotate self - rotatably. The planetary gear I 103 drives the ring gear I 102 to rotate.

[0035] There is a mating spur gear 3 on the side below the test planetary gear transmission structure 1. The mating spur gear 3 of the test box includes a spur gear I 301 and a power transmission stepped shaft I 302. The power transmission stepped shaft I 302 is installed in the shaft hole of the spur gear I 301. The spur gear I 301 is rotationally supported on the mating spur gear bracket of the test box through the power transmission stepped shaft I 302. The spur gear I 301 meshes with the ring gear I 102.

[0036] The test planetary gear transmission structure 2 includes a sun gear II 201, a ring gear II 202, several planet gears II 203 and a planet carrier II 206. The sun gear connecting shaft II 205 is installed in the shaft hole of the sun gear II 201. The planet gear connecting shaft II 204 is installed in the shaft hole of the planet gear II 203. The planet carrier II 206 is fixedly connected to the test planetary gear bracket. The planet gears II 203 are supported on the planet carrier II 206 through bearings. The several planet gears II 203 are arranged around the sun gear II 201. The sun gear II 201, the ring gear II 202 and the planet gears II 203 are all made by undercutting treatment. The ring gear II 202 is disengaged from meshing contact with the planet gears II 203. The sun gear II 201 is disengaged from meshing contact with the planet gears II 203. The sun gear connecting shaft II 205 is connected to the sun gear connecting shaft I 105 through a coupling. The planet gear connecting shaft II 204 is connected to the planet gear connecting shaft I 104 through a coupling.

[0037] There is a mating spur gear 4 on the side below the test planetary gear transmission structure 2. The mating spur gear 4 of the test box includes a spur gear II 401 and a power transmission stepped shaft II 402. The power transmission stepped shaft II 402 is installed in the shaft hole of the spur gear II 401. The spur gear II 401 is rotationally supported on the mating spur gear bracket of the test box through the power transmission stepped shaft II 402. The spur gear II 401 meshes with the ring gear II 202. The power transmission stepped shaft II 402 is connected to the power output shaft I 302 through a coupling. The spur gear II 401 drives the ring gear II 202 to rotate.

[0038] Embodiment 2:

[0039] The main content of this embodiment is the same as that of Embodiment 1. Among them, the sun gear I 101 and the sun gear connecting shaft I 105, the planet gear I 103 and the planet gear connecting shaft I 104, the sun gear II 201 and the sun gear connecting shaft II 205, the planet gear II 203 and the planet gear connecting shaft II 204, the spur gear I 301 and the power transmission stepped shaft I 302, and the spur gear II 401 and the power transmission stepped shaft II 402 are all fixed by flat keys.

[0040] Embodiment 3:

[0041] The main content of this embodiment is the same as that of Embodiment 1 or 2. Among them, the several planetary gears Ⅰ 103 are 5 planetary gears Ⅰ 103 of the same specification. The planetary gears Ⅱ 203 are 5 planetary gears Ⅱ 203 of the same specification.

[0042] Embodiment 4:

[0043] The main content of this embodiment is the same as any one of Embodiments 1 to 3. Among them, the pilot planetary gear bracket, the test planetary gear bracket, the pilot box mating spur gear bracket, and the test box mating spur gear bracket are all connected to the test platform by bolts. The upper surface of the test platform is provided with a T-shaped chute. The head of the bolt is embedded in the chute. The rod part of the bolt passes through the base of the pilot planetary gear bracket, the test planetary gear bracket, the pilot box mating spur gear bracket, or the test box mating spur gear bracket and is fastened by a nut.

[0044] The T-shaped chute provides guiding and limiting functions, allowing the head of the bolt to slide along the chute to achieve flexible adjustment of the position of the bracket. The T-shaped cross-section of the chute can prevent the bolt from coming out. The form of nut fastening not only allows horizontal position adjustment but also provides a fixing force in the vertical direction through the pre-tightening force.

[0045] Embodiment 5:

[0046] This embodiment provides a test method for the wind resistance loss test device of the planetary gear system according to any one of Embodiments 1 to 4, including the following steps:

[0047] 1) Build a wind resistance loss test device for the planetary gear system.

[0048] 2) Measure the moment of inertia without the gear pair.

[0049] 3) Conduct an unloaded speed decay test.

[0050] 4) Install the test planetary gear transmission structure 2 and measure the moment of inertia. The pilot planetary gear transmission structure 1 adjusts the power and speed to the values required by the test planetary gear transmission structure 2. Ensure that the components of the pilot planetary gear transmission structure and the measured planetary gear transmission structure run at the same speed.

[0051] 5) Conduct a loaded speed decay test.

[0052] 6) Calculate the wind resistance power loss.

[0053] It should be noted that wind resistance loss accounts for a significant proportion in high-speed gear systems. The test of wind resistance loss in planetary gear systems is a key link to improve the efficiency of the transmission system. The test results of this embodiment not only support design optimization and performance evaluation, but also provide data support for energy-saving and emission-reduction technologies. The test results can provide a direct basis for optimizing the design of the gearbox and reducing energy consumption. The test data can be used to verify the accuracy of simulation models such as computational fluid dynamics (CFD), promoting the coordinated development of theory and practice. By analyzing the relationship between wind resistance loss and gear parameters (such as tooth profile, module, tooth width), the geometric design of gears can be optimized. Monitoring the changes in wind resistance loss under different working conditions can evaluate the dynamic performance of the gear transmission system and identify abnormal losses caused by wear or assembly problems.

Claims

1. A wind resistance loss test device for a planetary gear system, characterized in that: It includes a test platform, and a companion planetary gear transmission structure (1), a test planetary gear transmission structure (2), a companion box mating spur gear (3), a test box mating spur gear (4), a companion planetary gear support, a test planetary gear support, a companion box mating spur gear support, and a test box mating spur gear support arranged on the test platform; An input motor and a load motor are provided on both sides of the test platform; a companion planetary gear support, a companion planetary gear transmission structure (1), a test planetary gear transmission structure (2), and a test planetary gear support are sequentially arranged between the input motor and the load motor; The companion planetary gear transmission structure (1) includes a sun gear I (101), a ring gear I (102), several planet gears I (103), and a planet carrier I (106); a sun gear connecting shaft I (105) is installed in the shaft hole of the sun gear I (101); the sun gear input shaft I (105) is a stepped shaft with torsional elasticity; a planet gear connecting shaft I (104) is installed in the shaft hole of the planet gear I (103); the planet carrier I (106) is fixedly connected to the companion planetary gear support; the planet gears I (103) are supported on the planet carrier I (106) through bearings; the several planet gears I (103) are arranged around the sun gear I (101); the planet gears I (103) mesh with the ring gear I (102) and the sun gear I (101); the sun gear connecting shaft I (105) transmits power from the input motor to the sun gear I (101); the sun gear I (101) drives the planet gears I (103) to rotate; the planet gears I (103) push the ring gear I (102) to rotate; A companion box mating spur gear (3) is provided on the side beside the companion planetary gear transmission structure (1) below; the companion box mating spur gear (3) includes a spur gear I (301) and a power transmission stepped shaft I (302); a power transmission stepped shaft I (302) is installed in the shaft hole of the spur gear I (301); the spur gear I (301) is rotatably supported on the companion box mating spur gear support through the power transmission stepped shaft I (302); the spur gear I (301) meshes with the ring gear I (102); The described test planetary gear transmission structure (2) includes a sun gear II (201), a ring gear II (202), a number of planet gears II (203), and a planet carrier II (206); a sun gear connecting shaft II (205) is installed in the shaft hole of the sun gear II (201); a planet gear connecting shaft II (204) is installed in the shaft hole of the planet gear II (203); the planet carrier II (206) is fixedly connected to the test planetary gear bracket; the planet gear II (203) is supported on the planet carrier II (206) by bearings; the number of planet gears II (203) are arranged around the sun gear II (201); the ring gear II (202) is disengaged from meshing contact with the planet gears II (203); the sun gear II (201) is disengaged from meshing contact with the planet gears II (203); the sun gear connecting shaft II (205) is connected to the sun gear connecting shaft I (105) through a coupling; the planet gear connecting shaft II (204) is connected to the planet gear connecting shaft I (104) through a coupling; A test box mating spur gear (4) is provided on the side beside the described test planetary gear transmission structure (2); the test box mating spur gear (4) includes a spur gear II (401) and a power transmission stepped shaft II (402); the power transmission stepped shaft II (402) is installed in the shaft hole of the spur gear II (401); the spur gear II (401) is rotatably supported on the test box mating spur gear bracket through the power transmission stepped shaft II (402); the spur gear II (401) meshes with the ring gear II (202); the power transmission stepped shaft II (402) is connected to the power output shaft I (302) through a coupling; the spur gear II (401) drives the ring gear II (202) to rotate.

2. The wind resistance loss test device for a planetary gear system according to claim 1, characterized in that: The sun gear II (201), the ring gear II (202), and the planet gears II (203) are all made by undercutting treatment.

3. The wind resistance loss testing device for a planetary gear system according to claim 1, characterized in that: The sun gear I (101) and the sun gear connecting shaft I (105), the planet gear I (103) and the planet gear connecting shaft I (104), the sun gear II (201) and the sun gear connecting shaft II (205), the planet gear II (203) and the planet gear connecting shaft II (204), the spur gear I (301) and the power transmission stepped shaft I (302), and the spur gear II (401) and the power transmission stepped shaft II (402) are all fixed with flat keys.

4. A wind resistance loss testing device for a planetary gear system according to claim 1, characterized in that: The number of planet gears I (103) is 5 planet gears I (103) of the same specification; the planet gears II (203) are 5 planet gears II (203) of the same specification.

5. A wind resistance loss test device for a planetary gear system according to claim 1, characterized in that: The accompanying test planetary gear bracket, the test planetary gear bracket, the accompanying test box mating spur gear bracket, and the test box mating spur gear bracket are all connected to the test platform through bolts; a T-shaped chute is provided on the upper surface of the test platform; the head of the bolt is embedded in the chute and can slide along the chute; the rod part of the bolt passes through the base of the accompanying test planetary gear bracket, the test planetary gear bracket, the accompanying test box mating spur gear bracket, or the test box mating spur gear bracket and is tightened by a nut.

6. The testing method of the wind resistance loss testing device for the planetary gear system according to any one of claims 1 to 5, characterized in that, It includes the following steps: 1) Build a wind resistance loss test device for the planetary gear system; 2) Measure the moment of inertia without gear pairs; 3) No-load speed decay test; 4) Install and test the planetary gear transmission structure (2) and measure the moment of inertia; the accompanying test planetary gear transmission structure (1) adjusts the power and speed to the values required for the test planetary gear transmission structure (2); Achieve the same operating speed for each component of the accompanying test planetary gear transmission structure and the measured planetary gear transmission structure; 5) Load speed decay test; 6) Calculate the wind resistance power loss.

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