Valve retainer abrasion loss measuring device and method

A valve seat ring and wear amount technology, which is applied to measurement devices, optical devices, instruments, etc., can solve problems such as large errors, influence of measurement and calculation errors, and inconvenient measurement, and achieves small errors, simple steps, and convenient measurement. Effect

Active Publication Date: 2013-09-11
HANGZHOU DIANZI UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, there is no unified standard for the measurement of the wear amount of the engine valve seat ring, and the difference between the quality of the valve seat ring before and after the test is mostly used to obtain the wear amount
However, this traditional measurement method has two disadvantages. First, the measurement is inconvenient. The valve seat ring must be removed

Method used

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  • Valve retainer abrasion loss measuring device and method
  • Valve retainer abrasion loss measuring device and method

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Embodiment Construction

[0013] The calculation method of the present invention will be further described below in conjunction with the accompanying drawings.

[0014] Such as figure 1 as shown,

[0015] is the angle between the tangent direction of the valve seat ring and the valve contact zone and the direction of the valve stem;

[0016] is the displacement in the direction of the valve stem when the valve is completely closed before and after the wear of the valve seat ring;

[0017] is the displacement of the wear amount of the valve seat along the wear direction;

[0018] Trapezoidal is the wear volume cross section;

[0019] Position 1 is the position when the valve is fully closed before the valve seat ring is worn;

[0020] Position 2 is the position when the valve is fully closed after the valve seat is worn;

[0021] is the material density of the valve seat ring;

[0022] Step 1. Calculating wear amount cross-section trapezoid area .

[0023] (Formula 1);

[0024] ...

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Abstract

The invention relates to a valve retainer abrasion loss measuring device and method. A cylinder head assembly composed of a valve, a cylinder head and a valve retainer is erected on a cylinder head support, and a laser displacement sensor rightly aligns to the valve. The method includes: equalizing volume of the valve retainer abrasion loss to volume of a boss ring; calculating the height of a trapezoid by measuring recess displacement in the direction of a valve rod when the valve is completely closed before and after abrasion and calculating an included angle between the tangent direction of a contact zone of the valve retainer and the valve and the direction of the valve rod; obtaining an upper bottom and a lower bottom of the trapezoid by measuring contact ring width variations before and after abrasion of the valve retainer; taking the average value from the contact zone before and after abrasion of the valve retainer to the center of the valve retainer as the average radius of the boss ring; calculating the volume of the abraded part of the valve retainer according to the above measured data and calculating abrasion mass of the valve retainer according to material density of the valve retainer. The valve retainer abrasion loss measuring device and method are convenient to measure and with no need of demounting the valve retainer.

Description

technical field [0001] The invention belongs to the technical field of engine detection, and relates to a device and method for measuring the amount of wear of a valve seat ring. Background technique [0002] The engine valve seat ring is one of the important parts in the cylinder head assembly. It cooperates with the valve to seal the cylinder together. The valve seat ring bears a large thermal load and mechanical load, and its working state and reliability are of great significance to the normal operation of the engine. The structural form of the valve seat will directly affect its cooperation with the valve, and the change of the structural form of the valve seat is not only caused by the stamping deformation caused by the gas in the cylinder, but also depends on the amount of contact wear between the valve seat and the valve. Therefore, the measurement and calculation of valve seat ring wear has practical significance. [0003] At present, there is no uniform standard ...

Claims

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Application Information

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IPC IPC(8): G01B11/02
Inventor 刘忠民丁佳颜金龙余旭康凌俊华
Owner HANGZHOU DIANZI UNIV
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