Torque testing device based on internal combustion engine testing bench

Abstract

The application discloses a torque testing device based on an internal combustion engine testing platform, which is characterized by comprising a coupling plate fixed on the internal combustion engine, a connecting rod fixed on the coupling plate, a rotary damper installed on the coupling plate, a torque transmission shaft coaxially connected with the rotary damper, and a torque sensor connected on the torque transmission shaft and used for measuring the torque of the torque transmission shaft. The torque of the engine crankshaft is obtained by measuring the moment on the internal combustion engine body through the coupling plate fixedly connected with the internal combustion engine body, the rotary damper, the torque transmission shaft and the torque sensor. In addition, the connecting rod is fixedly arranged on the coupling plate, the hammer head of the connecting rod is always kept vertical downward, and the constant one-way static moment is provided, so that the back and forth torsion of the internal combustion engine crankshaft during the rotation process is effectively reduced, the interference in the torque measurement process is effectively eliminated, the accuracy of the torque measurement is effectively provided, and the problems in the prior art are solved.

Description

Technical Field

[0001] This invention relates to a torque testing device based on an internal combustion engine test bench. Background Technology

[0002] Existing internal combustion engine test benches typically use a combination of a torque shaft and a static torque sensor to monitor output torque. This involves using the static torque sensor to capture and monitor the electrical signal of the transmitted torque output. However, this method of outputting transmission torque via a single torque shaft has drawbacks. Because torsional vibrations occur when the internal combustion engine transmits power to the propeller, as the crankshaft rotates at an average speed, the various elastic components experience instantaneous velocity fluctuations of different magnitudes and phases due to various reasons. This results in back-and-forth twisting along the rotational direction, which interferes with torque monitoring and ultimately affects the accuracy of the monitored torque values. Summary of the Invention

[0003] The purpose of this invention is to provide a torque testing device that can effectively improve the accuracy of torque values.

[0004] To address the above problems, this invention provides a torque testing device based on an internal combustion engine test bench, characterized in that it includes:

[0005] A connecting plate fixed to an internal combustion engine;

[0006] A connecting rod fixed to the connecting plate, the connecting rod including at least a horizontally arranged connecting part and a vertically downward arranged hammer head;

[0007] Rotational damper mounted on the connecting plate;

[0008] A torque transmission shaft coaxially connected to the rotary damper;

[0009] A torque sensor connected to the torque transmission shaft for measuring the torque of the torque transmission shaft.

[0010] As a further improvement of the invention, the axis of the rotational damper passes through the geometric center of the connecting plate.

[0011] As a further improvement of the present invention, the rotary damper is a shaft-shaped connector that has a damping effect and is capable of rotation, and the rotation angle of the rotary damper is less than or equal to 2°.

[0012] As a further improvement of the present invention, the rotary damper is electrically connected to a computer to obtain the torque value on the torque sensor in real time.

[0013] The beneficial effects of this invention are as follows: by connecting a connecting plate, a rotation damper, a torque transmission shaft, and a torque sensor that are fixedly connected to the internal combustion engine body, the invention measures the torque on the internal combustion engine body and thus obtains the torque of the engine crankshaft. In addition, a connecting rod is fixedly installed on the connecting plate, and a hammer head that is always vertically downward is provided on the connecting rod to provide a constant unidirectional static torque, which effectively reduces the back-and-forth twisting during the rotation of the internal combustion engine crankshaft and effectively eliminates interference during torque measurement, thereby effectively improving the accuracy of torque measurement and solving the problems in the prior art. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of the present invention.

[0015] Figure 2 yes Figure 1 A schematic diagram of the connecting plate and the connecting part in the diagram.

[0016] In the diagram: 2-Internal combustion engine; 4-Connecting plate; 6-Connecting rod; 602-Connecting part; 604-Hammer head; 8-Rotation damper; 10-Torque transmission shaft; 12-Torque sensor. Detailed Implementation

[0017] The technical solution of the present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0018] like Figure 1-2 As shown, the present invention includes a connecting plate 4, a connecting rod 6, a rotary damper 8, a torque transmission shaft 10, and a torque sensor 12. The connecting plate 4 is fixed to the body of the internal combustion engine 2 by four fixing rods; the connecting rod 6 is fixed to the connecting plate 4; the connecting rod 6 includes a horizontally arranged connecting part 602 and a vertically downward-arranged hammer head 604; the rotary damper 8 is mounted on the connecting plate 4 (in one embodiment of the present invention, the rotary damper 8 is mounted at the geometric center of the connecting plate 4, and the rotation angle of the torque sensor 12 is less than or equal to 2°); the torque transmission shaft 10 is coaxially connected to the rotary damper 8; the torque sensor 12 is mounted on the torque transmission shaft 10, and the torque sensor 12 is electrically connected to a computer for displaying the torsion value on the torque sensor 12.

[0019] This invention obtains the crankshaft torque by measuring the torque on the machine body. Specifically, in a transmission mechanical component operating at a constant speed, a pair of torques T and T′ must exist simultaneously on its main shaft (the crankshaft in this embodiment) and the machine body, and these two torques are equal in magnitude and opposite in direction. The torque T on the crankshaft is measured by measuring the torque T′ on the machine body.

[0020] In this invention, a connecting plate 4, a rotation damper 8, a torque transmission shaft 10, and a torque sensor 12 are connected and fixedly connected to the internal combustion engine 2 body to measure the torque on the internal combustion engine 2 body, thereby obtaining the torque of the engine crankshaft. In addition, a connecting rod 6 is fixedly installed on the connecting plate 4, and a hammer head 604 that is always vertically downward is provided on the connecting rod 6 to provide a constant unidirectional static torque, which effectively reduces the back-and-forth twisting during the rotation of the internal combustion engine 2 crankshaft, effectively eliminates interference during torque measurement, and thus effectively improves the accuracy of torque measurement, solving the problems in the prior art.

[0021] The technical principles of the present invention have been described above with reference to specific embodiments. These descriptions are merely for explaining the principles of the invention and should not be construed as limiting the scope of protection of the invention in any way. Based on this explanation, those skilled in the art can readily conceive of other specific embodiments of the invention without inventive effort, and these embodiments will all fall within the scope of protection of the present invention.

Claims

1. A torque testing device based on an internal combustion engine test bench, characterized in that, include: A connecting plate (4) fixed on the internal combustion engine (2); a connecting rod (6) fixed on the connecting plate (4), the connecting rod (6) including at least a horizontally arranged connecting part (602) and a vertically downward arranged hammer head (604) that constantly provides a unidirectional static torque; a rotary damper (8) mounted on the connecting plate (4); a torque transmission shaft (10) coaxially connected to the rotary damper (8); and a torque sensor (12) connected to the torque transmission shaft (10) for measuring the torque of the torque transmission shaft (10).

2. The torque testing device based on an internal combustion engine test bench according to claim 1, characterized in that, The axis of the rotary damper (8) passes through the geometric center of the connecting plate (4).

3. The torque testing device based on an internal combustion engine test bench according to claim 2, characterized in that, The rotary damper (8) is a shaft-shaped connector that has a damping effect and can rotate, and the rotation angle of the rotary damper (8) is less than or equal to 2°.

4. The torque testing device based on an internal combustion engine test bench according to claim 3, characterized in that, The rotary damper (8) is electrically connected to a computer to obtain the torque value on the torque sensor (12) in real time.

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