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Rapid and automatic detection method and controller for shaft sleeve crack of mechanical sealing element

A mechanical seal, automatic detection technology, used in the use of liquid/vacuum for liquid tightness measurement, instruments, by measuring the acceleration and deceleration rates of fluids, etc., can solve long detection time, high detection cost, and automation difficulties problem, to achieve the effect of high degree of automation, high detection efficiency and low cost

Inactive Publication Date: 2016-08-31
宁波精科机械密封件制造有限公司 +1
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Problems solved by technology

However, the above detection methods have problems such as long detection time, high detection cost, and difficulty in realizing automation.

Method used

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  • Rapid and automatic detection method and controller for shaft sleeve crack of mechanical sealing element
  • Rapid and automatic detection method and controller for shaft sleeve crack of mechanical sealing element
  • Rapid and automatic detection method and controller for shaft sleeve crack of mechanical sealing element

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Embodiment Construction

[0023] In order to better understand the present invention, the embodiments of the present invention will be further described below in conjunction with the accompanying drawings and specific implementation methods, see Figure 1 to Figure 4 :

[0024] According to the method for fast and automatic detection of shaft sleeve cracks of mechanical seals implemented in the present invention, its measurement principle is as follows: after sealing the workpiece to be tested, inflate the inside of the workpiece, and after holding the pressure for a period of time, the qualified products without cracks leak slowly, and the internal The air pressure is stable, which is almost the same as the output air pressure of the external air source. There are cracks and unqualified products. When the air pressure reaches 0.4MPa, the air leakage is serious, so the air pressure is unstable or the value of the stabilized pressure is small. The digital electronic barometer collects the air pressure i...

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Abstract

The invention relates to the mechanical field, especially to a rapid and automatic detection method and controller for a shaft sleeve crack of a mechanical sealing element. The method comprises the steps of equipment preparation, feeding, testing, sorting, and framing and warehousing. In addition, the controller consists of a programmable controller, a proximity switch, a photoelectric switch, an electromagnetic valve, and a stepping motor driver. According to the invention, two end surfaces of a shaft sleeve are sealed by choke plugs and then inflation is carried out in an inner cavity of the shaft sleeve to form a high pressure; an electronic barometer detects the pressure; and an objective of rapid detection is achieved according to a principle of different pressures of to-be-detected workpieces with or without cracks. With a vibrating screen and a synchronous belt, automatic feeding is realized; and a sorting assembly carried out sorting. The automation degree and the detection efficiency are high. The apparatus with a simple structure has low costs.

Description

technical field [0001] The invention relates to an automatic detection technology, in particular to an automatic detection method and a controller for detecting the airtight performance of a shaft sleeve of a mechanical seal. Background technique [0002] Since the transmission shaft of the liquid medium rotary machine runs through the inside and outside of the equipment, there is a circumferential gap between the shaft and the equipment, and the medium in the equipment leaks outward through this gap, so there must be a shaft sealing device to prevent leakage. There are many types of shaft seals, and mechanical seals have the advantages of less leakage and long life, and have become the most important shaft sealing method. The mechanical seal is a kind of axial end face sealing device that relies on the preloading of the elastic element on the end face seal pair of the moving ring and the static ring and the compression of the medium pressure and the pressure of the elastic ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M3/26G01N7/00
CPCG01M3/26G01N7/00
Inventor 詹白勺戴志能余伟平倪君辉
Owner 宁波精科机械密封件制造有限公司
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