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Method for testing liquid lubrication machine seal sealing performance and devices thereof

A mechanical seal and testing method technology, which is applied in the direction of liquid tightness measurement by using liquid/vacuum degree, and by measuring the increase and decrease rate of the fluid, can solve the problems of difficult friction torque, centering difficulty, and large vibration of the sealing end face. Achieve the effect of convenient adjustment and overcoming large vibration

Active Publication Date: 2014-03-12
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problems of large vibration, difficult centering and difficult to accurately measure the friction torque of the sealing end face when the traditional sealing test device is running at high speed, the present invention provides an accurate measurement Friction torque, convenient adjustment of shaft speed and seal cavity pressure, small vibration, simple centering, installation and disassembly, automatic collection of sealing performance parameters, liquid lubricated mechanical seal sealing performance test method and its device

Method used

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  • Method for testing liquid lubrication machine seal sealing performance and devices thereof
  • Method for testing liquid lubrication machine seal sealing performance and devices thereof
  • Method for testing liquid lubrication machine seal sealing performance and devices thereof

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Experimental program
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Effect test

Embodiment 1

[0031] Embodiment 1 A kind of testing method of liquid lubricated mechanical seal sealing performance, comprises the following steps:

[0032] 1) Add sealing medium to the liquid storage tank, start the compressor to supply pressure to the sealing pressure, start the circulation pump to realize the circulation of the sealing medium in the sealing cavity, and the pressure of the sealing medium is controlled by the compressor;

[0033] 2) Measure the temperature of the end face: start the motor, the motor drives the moving components to rotate, insert a thermocouple sensor into the test hole on the static seal ring of the experiment, the thermocouple sensor transmits the real-time monitored temperature signal to the computer, and the computer performs the temperature signal received. Analysis and processing;

[0034] 3) Leakage rate measurement: Under the action of the pressure difference on the end face of the mechanical seal, the sealing medium will leak to the outside through...

Embodiment 2

[0038]Embodiment 2 The device constructed according to the test method described in Embodiment 1 includes a sealing device 1, a driving device 2, an auxiliary device 3, and a testing device 4. The sealing device 1 includes a sealed cavity with a sealing liquid inlet and outlet 11. The moving assembly 12 and the static assembly 13 installed in the sealed cavity, the moving assembly 12 includes the moving ring seat 121, the experimental sealing moving ring 122, the auxiliary sealing moving ring 123, the experimental sealing moving ring 122, the auxiliary sealing The sealing dynamic ring 123 is installed on the shaft sleeve 251 of the rotating shaft 25; the static assembly 13 includes a static ring end cover 131, an auxiliary static ring end cover 132, an experimental sealing static ring 133 and an auxiliary sealing static ring 134. The sealing static ring 133 and the auxiliary sealing static ring 134 are respectively fixed with the static ring end caps 131 and the auxiliary stati...

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Abstract

Provided are a method for testing the liquid lubrication machine seal sealing performance and devices thereof. The method comprises the steps of adding a sealing medium to a liquid storage tank, starting a compressor to supply pressure to sealing pressure, starting a circulating pump and measuring the temperature, the leakage rate and the friction torque of an end face through a thermocouple sensor, an electronic analytical balance and a pressure sensor respectively. The devices of the method comprise a sealing device, a driving device, an auxiliary device and a testing device. The sealing device includes a sealing cavity with sealing liquid inlet and outlet, and movable assemblies and static assemblies which are installed in the sealing cavity; the driving device includes a bracket, a motor, a synchronous belt wheel, a synchronous belt, a rotating shaft and a bearing box; and the testing device includes a dowel bar, a pressure sensor, a thermocouple sensor, an electronic balance and a computer. The method and the devices have the following advantages: friction torque, temperature rise and leakage rate of various sealing end faces can be acquired accurately, conveniently and automatically; vibration and noise are low; and the structure is compact and disassembly and assembly alignment is convenient.

Description

technical field [0001] The invention relates to a method and a device for testing the sealing performance of a liquid lubricated mechanical seal. Background technique [0002] Among the currently known mechanical seal test devices, most of them are two fulcrums or cantilever beam seal test devices. The rotating main shaft and the motor use a coupling to transmit power. If the alignment is not good, the shaft end will swing and The vibration is very large, which will seriously affect the accurate measurement of the performance parameters of the mechanical seal; in addition, the bearing box of the traditional sealing device is an integral structure, which requires casting process, which is time-consuming and labor-intensive. The measurement of traditional mechanical seal friction torque is mostly obtained by installing a torque meter between the motor and the bearing box. The test data includes the friction torque of the bearing in the bearing box and the viscous resistance be...

Claims

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Application Information

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IPC IPC(8): G01M3/02G01M3/26
Inventor 孟祥铠佘宝瑛沈明学白少先彭旭东
Owner ZHEJIANG UNIV OF TECH
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