Rocker arm type valve wear test device

Abstract

The invention discloses a rocker arm type valve wear test device which comprises a rocker arm platform, a rocker arm, a cam, a motor, a combustion chamber, a valve tapered head, a valve, a valve retainer and an impact spring for driving the valve to impact the valve retainer. A valve head of the valve stretches into the combustion chamber, the valve retainer is arranged in the combustion chamber, a valve rod of the valve stretches out of the combustion chamber, the valve tapered head is fixedly connected to the valve rod, the valve rod is sleeved with the impact spring, the two ends of the impact spring are connected with the valve tapered head and the combustion chamber respectively, the middle of the rocker arm is hinged to the rocker arm platform, one end of the rocker arm is the driven end driven by the cam, the other end of the rocker arm is a trigger end for driving the valve rod to move, and the motor is used for driving the cam to rotate. The device is driven by the motor, a roller makes contact with the cam, wear between the cam and the rocker arm is reduced, contact of the rocker arm and the valve is more accurate, and the wear condition produced when the rocker arm makes contact with the valve can be accurately observed.

Description

technical field [0001] The invention relates to a test device, in particular to a rocker arm type valve wear test device. Background technique [0002] Rocker arms, valves, valve guides and valve seat rings are the main components of the engine's valve train. With the development of the engine in the direction of high strengthening, the engine speed, average effective pressure, and maximum deflagration pressure have been continuously increased. The wear of the rocker arm, valve, valve guide, valve seat and other components is also more serious, which increases the valve clearance and reduces the valve lift, causing the following serious consequences to the engine valve mechanism: 1. The movement of the valve mechanism 2. The stability and vibration of the gas distribution mechanism deteriorated; 3. The inertial force suffered increased; 4. The gas distribution phase was damaged, resulting in incomplete exhaust and insufficient intake; 5. Ventilation The loss increases, and ...

AI Technical Summary

Problems solved by technology

[0003] However, the research on rocker valve wear at home and abroad mainly focuses on the material selection and wear test of materials, and is limited to the discovery of material wear performance on traditional wear testing machines, ignoring the influence of the actual working environment. There are few studies on the fit, and the wear form between the parts is not considered in actual work

However, the general machine test lacks sufficient pertinence, and the research on the stiffness of the rocker arm and the wear of the valve is not systematic enough, and it is easy to ignore the interaction between the two, and the inspection period is too long and the cost is high

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