A mechanical power test bench coupled with a terminal friction clutch and a starting method thereof

Abstract

A mechanical power test bench with terminal friction clutch coupling and its starting method belong to the technical field of friction clutch performance test. The present invention is to solve the problem that the existing two friction clutch full-load tests cannot realize power reverse transmission. It includes: the span of the test gearbox and the accompanying test gearbox at both ends is the same, and the center height is the same; the traction motor is connected to the accompanying test gearbox, and a hydraulic loader is arranged between the accompanying test gearbox and the test gearbox, and the two flange ends of the test gearbox are respectively provided with a friction clutch; the traction motor is connected to the accompanying test gearbox through a first coupling; one end of the accompanying test gearbox and one end of the test gearbox are connected through a second coupling; the other end of the accompanying test gearbox and one end of the hydraulic loader are connected through a torque meter and a third coupling; the other end of the hydraulic loader and the other end of the test gearbox are connected through a fourth coupling. The present invention is used for performance testing of friction clutches.

Description

Technical Field

[0001] The invention relates to a mechanical power test bench coupled with a terminal friction clutch and a starting method thereof, belonging to the technical field of friction clutch performance testing. Background Art

[0002] The friction clutch is located between the engine and the gearbox, or is combined with the gear to form a gearbox assembly with clutch, forward and reverse functions. It is the main component connecting the engine and the shaft system. The output shaft of the clutch is the input shaft of the gearbox. If there is no clutch between the engine and the load, a large inertia force will be generated as soon as the engine starts, forming a huge resistance torque on the engine, causing the engine speed to drop sharply or even stall.

[0003] The performance of the friction clutch is directly related to the output performance of the engine, so how to evaluate the performance characteristics of the friction clutch is an important issue. To analyze the performance characteristics of the friction clutch, it is necessary to conduct simulation analysis and tests on the test bench. Through the analysis of the test bench, the hidden dangers of the friction clutch during operation can be discovered in time, the accident losses can be reduced, and the safety, reliability and economic benefits of the friction clutch operation can be improved.

[0004] When two friction clutch gearboxes are tested at full load, a fully loaded dragging main engine is usually used for loading, and the main engine can be an electric motor, a gas turbine, a diesel engine, etc. A dynamometer is used as the load, which can be a hydraulic dynamometer, an eddy current dynamometer, an electric dynamometer, etc. Building this test bench often requires a large space and a large amount of test funding support. Moreover, the above test bench layout can only achieve the output power of the main engine and the absorption power of the dynamometer, that is, the power is transmitted from one side of the friction clutch end to the other side of the friction clutch end, but cannot achieve the reverse transmission of power, that is, the power is transmitted from the other side of the friction clutch end to this side of the friction clutch end. Moreover, when the gearbox needs to undergo a long-term durability test, the required test funds are particularly large. Summary of the invention

[0005] The purpose of the present invention is to solve the problem that the existing full-load test of two friction clutches cannot realize power reverse transmission, and to provide a mechanical power test bench for terminating friction clutch coupling and a starting method thereof.

[0006] The present invention discloses a mechanical power test bench for end-connected friction clutch coupling, which comprises a traction motor, a test gearbox, a companion test gearbox, a hydraulic loader, a first coupling, a second coupling, a third coupling, a fourth coupling and a torque meter;

[0007] The spans of both ends of the test gearbox and the companion gearbox are the same, and the center heights are the same;

[0008] The traction motor is connected to the accompanying test gearbox, a hydraulic loader is arranged between the accompanying test gearbox and the test gearbox, and two flange ends of the test gearbox are respectively provided with a friction clutch;

[0009] The traction motor is connected to the accompanying test gearbox via a first coupling;

[0010] One end of the companion test gear box and one end of the test gear box are connected via a second coupling;

[0011] The other end of the test gearbox and one end of the hydraulic loader are connected via a torque meter and a third coupling;

[0012] The other end of the hydraulic loader and the other end of the test gear box are connected through a fourth coupling.

[0013] Preferably, the traction motor, the test gear box, the accompanying test gear box and the hydraulic loader are respectively supported by brackets so that the center heights of the traction motor, the test gear box, the accompanying test gear box and the hydraulic loader are the same.

[0014] Preferably, the two flange ends of the test gear box are both input ends and output ends.

[0015] Preferably, the friction clutch is a terminal friction clutch.

[0016] Preferably, the engagement modes of the friction clutch include: static engagement and dynamic engagement.

[0017] The present invention provides a method for starting a mechanical power test bench coupled with a terminal friction clutch. When the friction clutch is engaged in a static engagement mode, the starting process of the mechanical power test bench is as follows:

[0018] Engage two friction clutches with the test gearbox;

[0019] Start the drag motor to the operating speed;

[0020] Adjust the hydraulic loader to apply torque to the test value;

[0021] When the working condition is increased, the drag motor first increases the running speed to the working speed, and then adjusts the torque value of the hydraulic loader;

[0022] When the working condition is reduced, adjust the torque value of the hydraulic loader, and then drag the motor to increase the running speed to the working speed;

[0023] When the friction clutch is engaged in a dynamic engagement mode, the starting process of the mechanical power test bench is as follows:

[0024] Start the drag motor to the operating speed;

[0025] Connect one friction clutch to the flange end of the test gearbox on one side of the second coupling, and connect another friction clutch to the other flange end of the test gearbox;

[0026] Adjust the hydraulic loader to apply torque to the test value;

[0027] When the working condition is increased, the drag motor first increases the running speed to the working speed, and then adjusts the torque value of the hydraulic loader;

[0028] When the working condition is reduced, adjust the torque value of the hydraulic loader, and then drag the motor to increase the running speed to the working speed.

[0029] Preferably, the applied torque of the hydraulic loader includes forward loading and reverse loading;

[0030] During the forward loading, the power transmission process is: traction motor and hydraulic loader → accompanying test gearbox → second coupling → test gearbox → fourth coupling → hydraulic loader;

[0031] During the reverse loading, the power transmission process is: traction motor and hydraulic loader → fourth coupling → test gear box → second coupling → accompanying test gear box) → third coupling → hydraulic loader.

[0032] Advantages of the present invention: The present invention proposes a mechanical power test bench with terminal friction clutch coupling, which can realize dynamic or static engagement / disengagement of two friction clutches, can realize power transmission in both positive and negative directions, and can perform full-load long-term tests on gearboxes with friction clutches. It has a compact structure, convenient control, and high loading accuracy. The power test bench realizes torque transmission through hydraulic loading, which can be realized with only a small traction motor, can completely replace large mainframes and load systems (such as dynamometers), and can reduce the test space. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a structural schematic diagram of a mechanical power test bench coupled with a terminal friction clutch according to the present invention;

[0034] Figure 2 It is a schematic diagram of the power transmission process route of the forward loading torque of the hydraulic loader of the present invention;

[0035] Figure 3 It is a schematic diagram of the power transmission process route of the hydraulic loader in the forward loading torque of the present invention. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0037] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0038] Specific implementation method 1: The following is combined Figure 1 The present embodiment is described as a mechanical power test bench for end-connected friction clutch coupling, which comprises a traction motor 1, a test gearbox 5, a companion test gearbox 3, a hydraulic loader 7, a first coupling 2, a second coupling 4, a third coupling 8, a fourth coupling 6 and a torque meter 9;

[0039] The spans of both ends of the test gearbox 5 and the accompanying test gearbox 3 are the same, and the center heights are the same;

[0040] The traction motor 1 is connected to the accompanying test gearbox 3, and a hydraulic loader 7 is arranged between the accompanying test gearbox 3 and the test gearbox 5. The two flange ends of the test gearbox 5 are respectively provided with a friction clutch;

[0041] The traction motor 1 is connected to the accompanying test gearbox 3 via a first coupling 2;

[0042] One end of the companion test gearbox 3 and one end of the test gearbox 5 are connected via a second coupling 4;

[0043] The other end of the test gearbox 3 and one end of the hydraulic loader 7 are connected through a torque meter and a third coupling 8;

[0044] The other end of the hydraulic loader 7 and the other end of the test gear box 5 are connected through a fourth coupling 6 .

[0045] In this embodiment, the traction motor 1 not only plays the role of starting the traction test bench, but also can be used to supplement the power consumed during the closed power operation. Therefore, the traction motor in the test bench does not need too much power.

[0046] In this embodiment, the hydraulic loader 7 is used to load the test torque.

[0047] Furthermore, the traction motor 1, the test gear box 5, the accompanying test gear box 3 and the hydraulic loader 7 are respectively supported by brackets so that the center heights of the traction motor 1, the test gear box 5, the accompanying test gear box 3 and the hydraulic loader 7 are the same.

[0048] Furthermore, the two flange ends of the test gear box 5 are both input ends and output ends.

[0049] Furthermore, the friction clutch is a terminal friction clutch.

[0050] In this embodiment, the terminal friction clutch cannot be connected to the traction motor.

[0051] Furthermore, the engagement modes of the friction clutch include: static engagement and dynamic engagement.

[0052] In this embodiment, the friction clutch can be engaged in a static manner or in a dynamic manner, and can apply torque in both positive and negative directions.

[0053] Specific implementation method 2: The following is combined Figure 2 and Figure 3 This embodiment describes the starting method of the mechanical power test bench in this embodiment. When the friction clutch is engaged in a static engagement mode, the starting process of the mechanical power test bench is as follows:

[0054] Engage the two friction clutches with the test gearbox 5;

[0055] Start and drag motor 1 to the operating speed;

[0056] Adjust the hydraulic loader 7 to apply torque to the test value;

[0057] When the working condition is increased, the traction motor 1 first increases the running speed to the working speed, and then adjusts the torque value of the hydraulic loader 7;

[0058] When the working condition is lowered, adjust the torque value of the hydraulic loader 7, and then drag the motor 1 to increase the running speed to the working speed;

[0059] When the friction clutch is engaged in a dynamic engagement mode, the starting process of the mechanical power test bench is as follows:

[0060] Start and drag motor 1 to the operating speed;

[0061] Connect one friction clutch to the flange end of the test gear box 5 on one side of the second coupling 4, and then connect another friction clutch to the other flange end of the test gear box 5;

[0062] Adjust the hydraulic loader 7 to apply torque to the test value;

[0063] When the working condition is increased, the traction motor 1 first increases the running speed to the working speed, and then adjusts the torque value of the hydraulic loader 7;

[0064] When the working condition is lowered, the torque value of the hydraulic loader 7 is adjusted downward, and then the motor 1 is dragged to increase the running speed to the working speed.

[0065] Furthermore, the applied torque of the hydraulic loader 7 includes forward loading and reverse loading;

[0066] During the forward loading, the power transfer process is:

[0067] Driving motor 1 and hydraulic loader 7 → test gearbox 3 → second coupling 4 → test gearbox 5 → fourth coupling 6 → hydraulic loader 7;

[0068] During reverse loading, the power transfer process is:

[0069] Driving motor 1 and hydraulic loader 7 → fourth coupling 6 → test gear box 5 → second coupling 4 → accompanying test gear box 3 → third coupling 8 → hydraulic loader 7.

[0070] Although the present invention is described herein with reference to specific embodiments, it should be understood that these embodiments are merely examples of the principles and applications of the present invention. It should therefore be understood that many modifications may be made to the exemplary embodiments and that other arrangements may be devised without departing from the spirit and scope of the present invention as defined by the appended claims. It should be understood that the various dependent claims and features described herein may be combined in a manner different from that described in the original claims. It should also be understood that features described in conjunction with individual embodiments may be used in other described embodiments.

Claims

1. A method for starting a mechanical power test bench coupled with a terminal friction clutch, characterized in that: It comprises a traction motor (1), a test gear box (5), a companion test gear box (3), a hydraulic loader (7), a first coupling (2), a second coupling (4), a third coupling (8), a fourth coupling (6) and a torque measuring instrument (9); The test gearbox (5) and the accompanying test gearbox (3) have the same span at both ends and the same center height; The traction motor (1) is connected to a test gearbox (3), a hydraulic loader (7) is arranged between the test gearbox (3) and the test gearbox (5), and two flange ends of the test gearbox (5) are respectively provided with a friction clutch; The traction motor (1) is connected to the accompanying test gear box (3) via a first coupling (2); One end of the companion test gear box (3) and one end of the test gear box (5) are connected via a second coupling (4); The other end of the accompanying test gearbox (3) and one end of the hydraulic loader (7) are connected via a torque meter and a third coupling (8); The other end of the hydraulic loader (7) and the other end of the test gear box (5) are connected via a fourth coupling (6); The engagement modes of the friction clutch include: static engagement and dynamic engagement; When the friction clutch is engaged in a static engagement mode, the starting process of the mechanical power test bench is as follows: Engage two friction clutches with the test gearbox (5); Starting the traction motor (1) to a running speed; Adjusting the hydraulic loader (7) to apply torque to the test value; When the working condition is increased, the traction motor (1) first increases the running speed to the working speed, and then adjusts the torque value of the hydraulic loader (7); When the working condition is lowered, the torque value of the hydraulic loader (7) is adjusted downward, and then the motor (1) is driven to increase the running speed to the working speed; When the friction clutch is engaged in a dynamic engagement mode, the starting process of the mechanical power test bench is as follows: Starting the drag motor (1) to a running speed; A friction clutch is connected to a flange end of a test gear box (5) on one side of the second coupling (4), and another friction clutch is connected to another flange end of the test gear box (5); Adjusting the hydraulic loader (7) to apply torque to the test value; When the working condition is increased, the traction motor (1) first increases the running speed to the working speed, and then adjusts the torque value of the hydraulic loader (7); When the working condition is reduced, the torque value of the hydraulic loader (7) is adjusted downward, and then the motor (1) is driven to increase the running speed to the working speed.

2. The starting method of a mechanical power test bench with a terminal friction clutch coupling according to claim 1 is characterized in that: The traction motor (1), the test gear box (5), the accompanying test gear box (3) and the hydraulic loader (7) are respectively supported by brackets so that the center heights of the traction motor (1), the test gear box (5), the accompanying test gear box (3) and the hydraulic loader (7) are the same.

3. The starting method of a mechanical power test bench with a terminal friction clutch coupling according to claim 1 is characterized in that: The two flange ends of the test gear box (5) are both input ends and output ends.

4. The starting method of a mechanical power test bench with a terminal friction clutch coupling according to claim 1 is characterized in that: The friction clutch is a terminal friction clutch.

5. The starting method of the mechanical power test bench according to claim 1, characterized in that: The torque applied by the hydraulic loader (7) includes forward loading and reverse loading; During the forward loading, the power transmission process is: traction motor (1) and hydraulic loader (7) → accompanying test gear box (3) → second coupling (4) → test gear box (5) → fourth coupling (6) → hydraulic loader (7); During reverse loading, the power transmission process is: traction motor (1) and hydraulic loader (7) → fourth coupling (6) → test gear box (5) → second coupling (4) → accompanying test gear box (3) → third coupling (8) → hydraulic loader (7).

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