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Device for ultrasonically measuring thickness of oil film of cylinder piston ring

A technology of oil film thickness and cylinder piston is applied in the field of cylinder piston ring oil film testing device to achieve the effect of convenient focus, stable device measurement and guaranteed working temperature

Active Publication Date: 2018-04-20
HARBIN ENG UNIV
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  • Abstract
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Problems solved by technology

[0007] Although the device used in the above-mentioned measurement method can measure the thickness of the oil film more accurately, it still has certain limitations.

Method used

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  • Device for ultrasonically measuring thickness of oil film of cylinder piston ring
  • Device for ultrasonically measuring thickness of oil film of cylinder piston ring

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Embodiment Construction

[0017] The present invention is described in more detail below in conjunction with accompanying drawing example:

[0018] combine Figure 1-2 , the present invention proposes an adjustable ultrasonic cylinder piston ring thin oil film thickness testing device, which can measure the thin oil film thickness of 1-20 μm. The device uses a spring model to calculate the thickness of the oil film through the ultrasonic reflection coefficient. The test device has higher measurement accuracy and a small minimum displacement, which can be as small as 1 μm, which improves the reliability and accuracy of the measurement result data. Since the working environment temperature of the transducer is about 50 degrees, and the transducer needs to be coupled with water, a circulating water cooling system is installed on the device, which can not only ensure the smooth operation of the transducer, but also reduce the impact of temperature changes on the measurement. influences.

[0019] The pre...

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Abstract

The aim of the invention is to provide a device for ultrasonically measuring the thickness of an oil film of a cylinder piston ring. An upright is connected with an upper positioning plate and a base.A dial indicator is fixed to the upper positioning plate. The inner wall of the upright is equipped with a guide rail. A slide block is mounted on the guide rail and cooperates with the guide rail toachieve relative movement. The dial indicator is connected with the slide block through a connecting rod. A cooling water tank is located inside a bench and is provided with a circular tube. One endof an ultrasonic transducer is connected with the slide block, and the other end of the ultrasonic transducer goes through the circular tube into the cooling water tank. The base is installed on a cylinder sleeve. A temperature sensor is disposed in the cooling water tank. The water outlet of an external water tank is connected with the water inlet of the cooling water tank via an electronic speedregulation pump. The water outlet of the cooling water tank communicates with the inlet of the external water tank. The temperature sensor and the electronic speed regulation pump are both connectedwith a temperature flow control system, and the ultrasonic transducer is connected with a ultrasonic transmitting and receiving devices. The device can achieve minimum displacement up to the level of1m, is stable in measurement, and eliminates the influence of temperature on the oil film thickness measurement.

Description

technical field [0001] The invention relates to an oil film test device, in particular to a cylinder piston ring oil film test device. Background technique [0002] Ultrasonic testing technology has the advantages of wide applicability, high flaw detection sensitivity, large detection depth, convenient use and good safety. It is currently one of the most widely used and most frequently used nondestructive testing technologies. At present, a large and excellent ultrasonic testing professional team and scientific research team have been established in China. The application scope of ultrasonic testing is expanding day by day. Related basic research and applied technology research are gradually deepening. Many achievements have reached or approached the foreign level. [0003] The research on ultrasonic detection technology first started abroad. In 1973, Tattersall H G. carried out bonding test by ultrasonic pulse method. If the medium Ⅱ embedded in the medium I is a thin laye...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B17/02
CPCG01B17/02
Inventor 杨晓涛齐松博石勇
Owner HARBIN ENG UNIV
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