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A Closed Gearbox Test Device Utilizing Hydraulic System Loading

A gearbox testing and hydraulic system technology, applied in the field of gearbox testing, can solve the problems of mechanical closed test bench size chain length, complex power system structure, difficult system installation and adjustment, etc., to achieve high-frequency dynamic loading and energy recovery The method is simple, the effect of reducing mass and force

Inactive Publication Date: 2018-03-30
CHANGAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, the size chain of the mechanical closed test bench is long, and the installation and adjustment of the system are difficult; the mechanical part of the electric closed test bench is relatively simple, and the power loss is small, but the way of energy recovery is to convert the mechanical energy output by the tested gearbox into electrical energy, through the electric power System recovery, complex power system structure, inconvenient installation and debugging
At the same time, the loading methods of the above two types of test benches have the disadvantage of unsatisfactory effects when dynamic loads are applied.

Method used

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  • A Closed Gearbox Test Device Utilizing Hydraulic System Loading
  • A Closed Gearbox Test Device Utilizing Hydraulic System Loading
  • A Closed Gearbox Test Device Utilizing Hydraulic System Loading

Examples

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Effect test

no. 1 Embodiment

[0021] Please refer to figure 1 with figure 2 As shown, the present invention is a closed gearbox testing device loaded with a hydraulic system, including a mechanical-hydraulic system and a testing and control system.

[0022] The mechanical-hydraulic system mainly includes prime mover 1 ( figure 1 The middle is the frequency conversion motor), the power synthesis box 2 ( figure 1 middle is gear transmission), input sensor 3, tested gearbox 4, output sensor 5, oil tank 6, oil filter 7, loading hydraulic pump 8, loading valve 9 ( figure 1 Among them are electromagnetic proportional relief valve), safety valve 10, anti-cavitation check valve 11 and hydraulic motor 12.

[0023] The test and control system of this embodiment mainly includes an industrial computer 13 , an input device 14 , an output device 15 and a speed regulating device 16 .

[0024] Power Synthesis Box 2 ( figure 1 The gear transmission in the center) has two input shaft ends and one output shaft end. Wh...

Embodiment 1

[0034] Embodiment 1 is an open system. The loading hydraulic pump 8 and the anti-cavitation check valve 11 suck oil from the fuel tank 6 , and the loading valve 9 , safety valve 10 and hydraulic motor 12 discharge oil to the fuel tank 6 .

[0035] 2. Test and control system

[0036] The user inputs an unloading signal to the industrial computer 13 through the input device 14 (such as a keyboard, etc.), and the industrial computer 13 sends an unloading signal to the loading valve 9 according to the set program to unload the system; the user inputs the working speed signal to the industrial computer 13 through the input device 14 , the industrial computer 13 sends a signal to the speed regulating device (such as a frequency converter) 16 according to the setting program to set the operating speed of the system; the user inputs the flow signal to the industrial computer 13 through the input device 14, and the industrial computer 13 loads the The hydraulic pump 8 sends out a signa...

no. 2 Embodiment

[0040] Please refer to image 3 with Figure 4 As shown, it is a schematic diagram of the second embodiment of a closed gearbox testing device utilizing hydraulic system loading according to the present invention.

[0041] Compared with the first embodiment, the prime mover 1 of the second embodiment is a diesel engine; the power synthesis box 2 adopts a chain drive; the loading valve 9 is an electromagnetic proportional throttle valve, and the pipeline pressure is changed by adjusting the size of the orifice; the second The hydraulic motor 12 of the embodiment is a variable motor, and a test gearbox 17 is installed between the output sensor 5 and the loading hydraulic pump 8, and an output terminal is added to the industrial computer 13, that is, the third output terminal is used to control the variable hydraulic motor. 12. Because under the condition that the hydraulic motor 12 displacement is determined, adjusting the displacement of the loading hydraulic pump 8 can make ...

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PUM

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Abstract

The invention discloses a closed gearbox testing device loaded by a hydraulic system, which includes a mechanical system, a prime mover for providing power, a hydraulic system for loading and energy recovery, and a testing device for controlling the motion state of the system and testing and analyzing test data. Control System. The hydraulic system provided by the invention can not only carry out stepless loading on the tested gearbox, but also can directly return the mechanical energy of the output end of the tested gearbox to the input end of the tested gearbox, so that the output energy of the gearbox becomes the test power. The energy recovery method is simple; the loading valve used has good dynamic response characteristics and can realize high-frequency dynamic loading. The invention can reduce the energy consumption in the gearbox performance test.

Description

【Technical field】 [0001] The invention relates to the field of gearbox testing, in particular to a closed gearbox testing device. 【Background technique】 [0002] The service life and mechanical efficiency of the gearbox are important indicators for assessing the performance of the gearbox. At present, there are two types of test benches for testing gearbox performance: open test benches and closed test benches. Since the output power of the gearbox cannot be recycled and the energy consumption is high, the open test bench is usually used for gearbox tests with low power or not too long test time. When conducting a transmission test with a long time and relatively high power, a closed transmission test bench is generally used. This test bench can recover the energy consumed by the test, and the test energy loss is small; the common closed transmission test bench There are two types: mechanically enclosed gearbox test bench and electrically enclosed gearbox test bench. Amon...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01M13/02
Inventor 郁录平张长伟路宇谢晓鹏薛雪周晨龙李鹏波胡小平
Owner CHANGAN UNIV