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Test apparatus for fatigue of spring under continuous impact of high pressure gas

A high-pressure gas and fatigue test technology, which is applied in the direction of impact test, measuring device, machine/structural component test, etc., can solve the problems that the spring deformation process cannot be truly simulated, and achieve simple structure, convenient operation and wide test range Effect

Inactive Publication Date: 2013-07-24
CHONGQING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main disadvantages of this device are: the working speed of the cylinder is limited by the load, and when carrying out fatigue tests on multiple springs, it is impossible to produce high-speed, high-frequency and high-load impacts on each spring; Due to the limitations, the impact load cannot be generated on the test spring, and the deformation process of the spring under impact conditions cannot be truly simulated.

Method used

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  • Test apparatus for fatigue of spring under continuous impact of high pressure gas
  • Test apparatus for fatigue of spring under continuous impact of high pressure gas
  • Test apparatus for fatigue of spring under continuous impact of high pressure gas

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Such as Figure 1~4 As shown, a high-pressure gas continuous impact spring fatigue test device mainly includes a high-pressure gas power part 1, an electrical control part 2 and a mechanical part 3. Its characteristics are:

[0028] The high-pressure gas power part 1 is mainly composed of three parts: an air compressor 1-1, an air storage tank 1-2 and a pneumatic triple unit 1-3 (ie, an air filter, a pressure reducing valve and a lubricator). The air compressor 1-1 communicates with the air storage tank 1-2 through the air pipe, and is used to transport the high-pressure gas compressed by the air compressor 1-1 to the air storage tank 1-2 for storage, so as to realize gas supply and utilization. The balance of gas provides continuous and stable power for the device of the present invention. The air storage tank 1-2 communicates with the inlet port of the electromagnetic reversing valve 2-1 of the electrical control part 2 through the air pipe in turn through the pneum...

Embodiment 2

[0032] A spring fatigue test device continuously impacted by high-pressure gas, same as embodiment 1. Wherein: the test tube 3-3 is 1000mm in length, 15mm in inner diameter, and 2mm in wall thickness; The length is 25mm, the wall thickness is 2mm, the diameter of the air inlet hole at the boss in the big end of the pipe connector 3-7 is 8mm, the length of the mass block 3-5 is 50mm, and the elastic The large end of the positioning column 3-1 is 40mm long, and the small end is 15mm long. The diameter of the threaded through hole on the small end of the spring positioning column 3-1 is 4mm. The test tube 3-3 corresponds to The diameter of the holes at the free ends of the test spring 4 and the auxiliary spring 5 is 8mm, and the number of the vent holes is 3, and the diameter is 8mm.

Embodiment 3

[0034] A spring fatigue test device continuously impacted by high-pressure gas, same as embodiment 1. Wherein: the test tube 3-3 is 3000mm in length, 70mm in inner diameter, and 8mm in wall thickness; The length is 100mm, the wall thickness is 8mm, the diameter of the air inlet hole at the boss in the big end of the pipe connector 3-7 is 50mm, the length of the mass block 3-5 is 200mm, and the elastic The large end of the positioning column 3-1 is 130mm long, and the small end is 40mm long. The diameter of the threaded through hole on the small end of the spring positioning column 3-1 is 10mm. The test tube 3-3 corresponds to The diameter of the holes at the free ends of the test spring 4 and the auxiliary spring 5 is 12mm, and the number of the vent holes is 6, and the diameter is 12mm.

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Abstract

The invention relates to a test apparatus for fatigue of a spring under continuous impact of high pressure gas, more particularly to a test apparatus for fatigue life of a cylindrical helical spring. The apparatus comprises a high pressure gas dynamic portion, an electrical control portion and a mechanical portion. According to the invention, the apparatus has advantages of simple structure and easy operation; besides, stable impact loads can be continuously put on a testing spring and precision of detection on fatigue life of a spring is high. The apparatus provided in the invention can be widely applied to a test on fatigue life of a cylindrical helical spring that bears a high-speed, high-frequency and high-load impact load, especially to a test on fatigue life of a stranded-wire helical spring.

Description

technical field [0001] The invention belongs to the technical field of test devices for mechanical parts, in particular to a fatigue life test device for cylindrical helical springs. Background technique [0002] Cylindrical coil spring is a mechanical part that uses elasticity to work, to control the movement of parts, alleviate shock or vibration, store energy, measure force, etc. It has a wide range of applications in industrial products and daily life. Cylindrical coil spring, as an elastic element, mainly bears load during work, and its load capacity and fatigue resistance directly affect the performance of the product. All springs subjected to variable loads must undergo fatigue performance testing in the links of internal quality control, user inspection, new product identification, certification, industry sampling inspection and process adjustment. In particular, the cylindrical coil springs used in some important equipment have to withstand high-speed, high-frequen...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01M7/08G01N3/36
Inventor 周杰张明明王时龙田波康玲赵昱李小勇
Owner CHONGQING UNIV