Gearbox transmission efficiency measuring device on torsion bar type gearbox closed test bed

Abstract

The application discloses a gear box transmission efficiency measuring device on a torsion bar type gear box closed test bench in the technical field of gear box testing, which comprises a test platform, a first coupling is arranged on the right side power output end of a motor, a torque speed sensor is arranged on the right side of the first coupling, a second coupling is arranged on the right side of the torque speed sensor, a first gear box input port is arranged on the right side of the second coupling, a first gear box is arranged on the right side of the first gear box input port, a first gear box output port is arranged on the right side middle part of the first gear box, a universal coupling is arranged on the right side of the first gear box output port, and a first bolt is arranged around the first gear box output port and the universal coupling; the torque speed sensor is arranged between the motor and the gear box, so that the power output by the motor can be directly measured, the power output by the motor is the power loss of the first gear box, the second gear box and the coupling, and the efficiency of a single gear box can be calculated.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of gear box testing, in particular to a gear box transmission efficiency measuring device on a torsion bar type gear box closed test bench. BACKGROUND

[0002] The gear box closed test bench is formed by connecting two gear boxes with the same transmission ratio by a universal coupling and a torsion bar. The torsion bar is loaded by rotating the loading flange to produce torsional deformation. After loading, the loading flange is locked to keep the torsion bar in a state of torsional deformation. The two gear boxes, the universal coupling and the torsion bar support form a closed load. At this time, there is meshing force between the gears inside the gear box, but the gears do not rotate. When the motor drives the gear box, it needs to overcome the power loss of the gear box and the transmission coupling, so the gear box closed test bench has the advantage of energy saving. A small-power motor can drive a high-power gear box. However, it is not convenient to measure the efficiency of the gear box. Therefore, we propose a gear box transmission efficiency measuring device on a torsion bar type gear box closed test bench. SUMMARY

[0003] The purpose of the present application is to provide a gear box transmission efficiency measuring device on a torsion bar type gear box closed test bench to solve the problems raised in the background art. A torque speed sensor is arranged between the motor and the gear box, and one coupling is arranged on each side of the torque speed sensor. The installation precision is further reduced, making the installation simpler.

[0004] To achieve the above-mentioned purpose, the present application provides the following technical solutions:

[0005] The application discloses a gear box transmission efficiency measuring device on a torsion bar type gear box closed test bed, which comprises a test platform, a motor arranged on the top left side of the test platform, a first coupling arranged on the power output end of the motor, a torque and rotating speed sensor arranged on the right side of the first coupling, a second coupling arranged on the right side of the torque and rotating speed sensor, a first gear box input port arranged on the right side of the second coupling, a first gear box arranged on the right side of the first gear box input port, a first gear box output port arranged on the right side of the middle part of the first gear box, a universal coupling arranged on the right side of the first gear box output port, a first bolt arranged around the first gear box output port and the universal coupling, and matched first nuts arranged on the first bolt, a second gear box arranged on the top right side of the test platform, a second gear box input port arranged on the left side of the middle part of the second gear box, the universal coupling being connected with the second gear box through the second gear box input port, a second bolt arranged around the right side of the universal coupling and the second gear box input port, and second nuts arranged on the second bolt, a second gear box output port arranged on the left side of the top of the second gear box, a driving flange arranged on the left side of the second gear box output port, an oil channel arranged on the driving flange, a torsion bar arranged on the left side of the driving flange, a third bolt arranged around the driving flange and the torsion bar, matched third nuts arranged on the third bolt, a first loading flange arranged on the left side of the torsion bar, a second loading flange arranged on the left side of the first loading flange, a first gear box second output port arranged on the top of the right side of the first gear box and matched with the second loading flange, a scale arranged on the top of the rear end face of the first gear box, a force transmission rod arranged on the left side of the second loading flange, the rear end face of the force transmission rod being overlapped and arranged on the right side of the scale, a fixing pin arranged between the front end faces of the first loading flange and the second loading flange, and a wrench matched with the right side of the front end face of the first loading flange.

[0006] Further, the bottom of the torque and rotating speed sensor is provided with a support platform, support columns are arranged on the left and right sides of the bottom of the support platform, and the bottoms of the support columns are jointly connected with a base fixedly connected to the top of the test platform.

[0007] Further, the motor is a variable frequency motor, and a motor mounting support frame matched with the motor is arranged on the top left side of the test platform.

[0008] Further, the first gear box output port, the first gear box second output port and the second gear box output port are all provided with telescopic universal couplings.

[0009] Further, the first loading flange and the second loading flange are positioned by a stop opening, and the number of perforations around the first loading flange and the second loading flange is odd or even.

[0010] Further, the front and rear end faces of the first gear box and the second gear box are both provided with mounting plates, and fourth bolts are arranged between the mounting plates and the test platform.

[0011] Compared with the prior art, the present application has the following advantages:

[0012] The gear box transmission efficiency measuring device on the torsion bar type gear box closed test bench can directly measure the power output by the motor by adding a torque speed sensor between the motor and the gear box, and the power output by the motor is the power loss of the first gear box, the second gear box and the shaft coupling, so that the efficiency of a single gear box can be calculated. BRIEF DESCRIPTION OF DRAWINGS

[0013] Fig. 1 The present application is a structural schematic diagram;

[0014] Fig. 2 The present application is a top view structural schematic diagram.

[0015] In the figure: 1, test platform; 2, motor; 3, first shaft coupling; 4, torque speed sensor; 5, second shaft coupling; 6, first gear box input port; 7, first gear box output port; 8, first bolt; 9, first nut; 10, universal shaft coupling; 11, second nut; 12, second bolt; 13, second gear box input port; 14, second gear box; 15, second gear box output port; 16, oil channel; 17, driving flange; 18, third bolt; 19, third nut; 20, torsion bar; 21, first loading flange; 22, second loading flange; 23, first gear box second output port; 24, first gear box; 25, scale; 26, force transmission rod; 27, fixed pin shaft; 28, wrench; 29, fourth bolt. DETAILED DESCRIPTION

[0016] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the present application.

[0017] Embodiment 1:

[0018] Please refer to Figs. 1-2The application provides a technical scheme: a gear box transmission efficiency measuring device on a closed test bench of a torsion bar type gear box, which comprises a test platform 1, a motor 2 arranged on the top left side of the test platform 1, a first coupling 3 arranged on the right side of the motor 2, a torque and rotating speed sensor 4 arranged on the right side of the first coupling 3, and a second coupling 5 arranged on the right side of the torque and rotating speed sensor 4, so that the power output by the motor 2 can be directly measured, the power output by the motor 2 is the power loss of the first gear box 24, the second gear box 14 and the first coupling 3 and the second coupling 5, the efficiency of a single gear box can be calculated, a first gear box input port 6 is arranged on the right side of the second coupling 5, a first gear box 24 is arranged on the right side of the first gear box input port 6, a first gear box output port 7 is arranged on the right side of the middle of the first gear box 24, a universal coupling 10 is arranged on the right side of the first gear box output port 7, a first bolt 8 is arranged around the first gear box output port 7 and the universal coupling 10, and matched first nuts 9 are arranged on the first bolt 8, a second gear box 14 is arranged on the top right side of the test platform 1, and a second gear box input port 13 is arranged on the left side of the middle of the second gear box 14.

[0019] The right side of the universal coupling 10 is connected with the second gear box 14 through the second gear box input port 13, a second bolt 12 is arranged around the right side of the universal coupling 10 and the second gear box input port 13, second nuts 11 are arranged on the second bolt 12, the middle of the first gear box 24 and the second gear box 14 can be connected through the universal coupling 10, a second gear box output port 15 is arranged on the left side of the top of the second gear box 14, a driving flange 17 is arranged on the left side of the second gear box output port 15, an oil channel 16 is arranged on the driving flange 17, a torsion bar 20 is arranged on the left side of the driving flange 17, a third bolt 18 is arranged around the driving flange 17 and the torsion bar 20, matched third nuts 19 are arranged on the third bolt 18, a first loading flange 21 is arranged on the left side of the torsion bar 20, a second loading flange 22 is arranged on the left side of the first loading flange 21, and a first gear box second output port 23 matched with the second loading flange 22 is arranged on the top right side of the first gear box 24.

[0020] The top of the first gear box 24 and the second gear box 14 can be connected through the arranged torsion bar 20, a closed loop connection is formed between the first gear box 24 and the connected second gear box 14 through the cooperation of the universal coupling 10 and the torsion bar 20, the first loading flange 21 and the second loading flange 22 are locked after loading, so that the torsion bar 20 always maintains a torsional deformation state, and a closed load is formed between the first gear box 24, the second gear box 14, the universal coupling 10 and the torsion bar 20.

[0021] At this time, the first gear box 24 and the internal gear of the second gear box 14 have meshing force but do not rotate, when the motor 2 drives the first gear box 24 and the second gear box 14, only the power loss of the first gear box 24 and the second gear box 14 and the first coupling 3 and the second coupling 5 needs to be overcome, the power of the motor 2 is the loss of the first gear box 24 and the second gear box 14 and the first coupling 3 and the second coupling 5, assuming that the transmission efficiency of the first gear box 24 and the second gear box 14 to be tested is the same, the transmission efficiency of the first gear box 24 and the second gear box 14 is calculated as follows, the motor input power P1 = input torque T1 * input speed n1

[0022] The theoretical power of a single gear box P2 = torque rod torque T2 * gear box speed n1

[0023] The total efficiency n1 of the torque = (2 * single gear box power - input power) / 2 * single gear box power = (2 * P2 - P1) / 2 * P2

[0024] Gear box gear transmission efficiency η = η1 / (η2 * η3)

[0025] Wherein, the flange coupling efficiency η2

[0026] The universal shaft efficiency η3

[0027] η is the transmission efficiency of the gear box;

[0028] The top of the rear end face of the first gear box 24 is provided with a scale 25, the left side of the second loading flange 22 is provided with a force transmission rod 26, the rear end face of the force transmission rod 26 is overlapped and arranged on the right side of the scale 25, the front end face between the first loading flange 21 and the second loading flange 22 is provided with a fixed pin shaft 27, the right side of the front end face of the first loading flange 21 is provided with a matching wrench 28, in this embodiment, the loading method is as follows: the wrench 28, the scale 25, and the force transmission rod 26 are assembled, the end of the force transmission rod 26 is overlapped on the scale 25, it is noted that the fixed pin shaft 27 is not assembled at this time, the crane is hooked to the wrench 28 to lift up, at this time the force transmission rod 26 will generate pressure on the scale 25, at this time the pressure value (unit: N) can be obtained from the scale 25, the loading torque required for turning the wrench 28 is the product of the pressure value and the acting length of the force transmission rod 26, and the fixed pin shaft 27 is assembled in the through hole around the first loading flange 21 and the second loading flange 22, and the loading is completed by fixing with a spring washer and a nut;

[0029] In this embodiment, when the closed gear box test bench is installed, the concentricity of the drive flange 17 on both sides of the torsion bar 20 and the first loading flange 21 has higher requirements for installation deviation, and when in operation, the non-concentricity of the drive flange 17 on both sides of the torsion bar 20 and the first loading flange 21 will cause the torsion bar 20 to bend, the rotation speed cannot be increased, and it will also cause the first gear box 24 and the second gear box 14 to be blocked, resulting in abnormal noise and heating of the entire test bench, and also affecting the determination of the efficiency of the first gear box 24 and the second gear box 14. The universal coupling 10 has an angle compensation function, and the concentricity of the drive flange 17 on both sides and the first loading flange 21 can not be highly required.

[0030] Preferably, the bottom of the torque speed sensor 4 is provided with a support platform, the left and right sides of the bottom of the support platform are provided with support columns, and the bottoms of the support columns are commonly connected with a base fixedly connected to the top of the test platform 1, which can provide a support point for the torque speed sensor 4 to work more stably.

[0031] Preferably, the motor 2 is a variable frequency motor, and the efficiency of the first gear box 24 and the second gear box 14 at different speeds is tested and measured. A motor mounting support frame matched with the motor 2 is arranged on the left side of the top of the test platform 1, and the motor 2 can be more stably supported and fixed by the motor mounting support frame.

[0032] Preferably, telescopic universal couplings are arranged at the first gear box output port 7, the first gear box second output port 23 and the second gear box output port 15, which reduces the precision requirement of installation and makes the installation simpler.

[0033] Embodiment 2:

[0034] Referring to Figs. 1-2 The difference between this embodiment and the first embodiment is that the first loading flange 21 and the second loading flange 22 are positioned by a stop opening, the number of perforations around is an odd number and an even number, only one hole can be aligned during loading, the loading rotation precision is 360° / (odd number*even number), and the loading torque precision is improved; the front and rear end surfaces of the first gear box 24 and the second gear box 14 are provided with mounting plates, and the fourth bolts 29 are arranged between the mounting plates and the test platform 1, so that the first gear box 24 and the second gear box 14 can be more stably installed on the top of the test platform 1.

[0035] The electrical appliances mentioned in this paper are connected with external power supply through wires.

[0036] Although the embodiments of the present application have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and spirits of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A gearbox transmission efficiency measuring device on a closed test bench for torsion bar gearboxes, comprising a test platform (1), characterized in that: A motor (2) is installed on the top left side of the test platform (1). A first coupling (3) is installed on the right power output end of the motor (2). A torque speed sensor (4) is installed on the right side of the first coupling (3). A second coupling (5) is installed on the right side of the torque speed sensor (4). A first gearbox input port (6) is installed on the right side of the second coupling (5). A first gearbox (24) is installed on the right side of the first gearbox input port (6). A first gearbox output port (7) is installed in the middle of the right side of the first gearbox (24). A universal coupling (1) is installed on the right side of the first gearbox output port (7). 0), a first bolt (8) is arranged around the output port (7) of the first gearbox and the universal coupling (10), and a matching first nut (9) is provided on each of the first bolts (8). A second gearbox (14) is arranged on the top right side of the test platform (1), and a second gearbox input port (13) is arranged in the middle of the left side of the second gearbox (14). The right side of the universal coupling (10) is connected to the second gearbox (14) through the second gearbox input port (13), and a second bolt (12) is arranged around the right side of the universal coupling (10) and the second gearbox input port (13). Each gearbox (14) is provided with a second nut (11). A second gearbox output port (15) is provided on the top left side of the second gearbox (14). A drive flange (17) is provided on the left side of the second gearbox output port (15). An oil passage (16) is provided on the drive flange (17). A torsion bar (20) is provided on the left side of the drive flange (17). A third bolt (18) is arranged around the drive flange (17) and the torsion bar (20). A matching third nut (19) is provided on each of the third bolts (18). A first loading flange (21) is provided on the left side of the torsion bar (20). A second loading flange (22) is provided on the left side of the first gearbox (24), and a second output port (23) of the first gearbox (24) is provided on the top right side of the first gearbox (24) to cooperate with the second loading flange (22). A scale (25) is provided on the top rear end face of the first gearbox (24). A force transmission rod (26) is provided on the left side of the second loading flange (22), and the rear end face of the force transmission rod (26) is overlapped on the right side of the scale (25). A fixing pin (27) is provided between the front end face of the first loading flange (21) and the second loading flange (22), and a matching wrench (28) is provided on the right side of the front end face of the first loading flange (21).

2. The gearbox transmission efficiency measuring device on a closed test bench for a torsion bar gearbox as described in claim 1, characterized in that: The torque and speed sensor (4) is provided with a support platform at its bottom. Support columns are provided on both the left and right sides of the bottom of the support platform. The bottom of the support columns are connected to a base, which is fixedly connected to the top of the test platform (1).

3. The gearbox transmission efficiency measuring device on a closed test bench for a torsion bar gearbox as described in claim 1, characterized in that: The motor (2) is a variable frequency motor, and a motor mounting support frame matching the motor (2) is provided on the top left side of the test platform (1).

4. The gearbox transmission efficiency measuring device on a closed test bench for torsion bar gearboxes according to claim 1, characterized in that: Telescopic universal couplings are provided at the first gearbox output port (7), the first gearbox second output port (23), and the second gearbox output port (15).

5. The gearbox transmission efficiency measuring device on a closed test bench for torsion bar gearboxes according to claim 1, characterized in that: The first loading flange (21) and the second loading flange (22) are positioned by a stop, and the number of perforations around them is odd and even.

6. The gearbox transmission efficiency measuring device on a closed test bench for torsion bar gearboxes according to claim 1, characterized in that: The first gearbox (24) and the second gearbox (14) are both provided with mounting plates at the bottom of their front and rear end faces, and a fourth bolt (29) is provided between the mounting plate and the test platform (1).

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