The Degree Of Wear Of The Oil Pressure Switch

- Oct 17, 2017 -

The degree of wear of the Oil Pressure Switch
The Oil Pressure Switch is a metal elastic ring with large outward expansion deformation, which is fitted into the corresponding annular groove of the profile. Reciprocating and rotating motion of the Oil Pressure Switch, relying on the gas or liquid pressure difference, in the ring and the outer cylinder and the ring and ring groove between the side of the formation of a seal.
There are many factors that affect the wear of the Oil Pressure Switch, and these factors are often intertwined. In addition, the type of engine and the use of different conditions, the Oil Pressure Switch wear is also very different, and thus can not rely solely on improving the structure and material of the Oil Pressure Switch itself to solve the problem, mainly from the following aspects: And cylinder liner materials and good match; surface treatment; structural state; lubricants and additives selection; due to assembly and operation of the heat caused by the cylinder liner and piston deformation
Hydraulic switch five characteristics
1: force. The force acting on the Oil Pressure Switch has the gas pressure, the ring itself elasticity, the inertia force of the ring reciprocating motion, the friction between the ring and the cylinder and the ring groove, as shown in the figure. As a result of these forces, the ring will produce axial movement, radial movement, rotary motion and other basic movement. In addition, due to its movement characteristics, accompanied by irregular movement, inevitably there are axial irregular movement caused by floating and axial vibration, radial irregular movement and vibration, distortion and so on. These irregular movements often prevent Oil Pressure Switches from functioning. Design of hydraulic switch, we should give full play to the favorable movement, control the negative side.
2: Thermal conductivity. The heat generated by the combustion, through the Oil Pressure Switch to the cylinder wall, it can play the role of cooling the piston. Through the Oil Pressure Switch to the cylinder wall scattered heat, the general can reach the top of the piston to withstand the heat of 30 to 40%
3: air tightness. The first function of the piston is to keep the seal between the piston and the cylinder wall, to control the leakage to a minimum. This effect is mainly borne by the gas ring, that is, the engine in any operating conditions, the compressed air and gas leakage should be controlled to a minimum Oil Pressure Switch , to improve thermal efficiency; to prevent leakage caused by the cylinder and the piston or between the cylinder and the ring To kill; to prevent the deterioration of lubricating oil caused by failure and so on.
4: oil control. The second role of the piston is to properly scrap the oil attached to the cylinder wall, and maintain the normal fuel consumption. When the supply of oil too much will be sucked to the combustion chamber, so that fuel consumption increases, and because of the combustion of carbon deposition, the impact on the engine performance is extremely bad.
5: supportive. Because the piston is slightly smaller than the cylinder diameter, such as no Oil Pressure Switch, the piston instability in the cylinder, it is impossible to move freely. At the same time, the ring should also prevent the piston directly with the cylinder contact, play a supporting role. Therefore, the hydraulic switch in the cylinder up and down movement, the sliding surface thanks to the ring to bear.
According to the function and working conditions of the Oil Pressure Switch, the material of the Oil Pressure Switch should have good abrasion resistance, thermal conductivity, heat resistance, impact toughness, elasticity and sufficient mechanical strength. Currently widely used Oil Pressure Switch materials are high-quality gray cast iron, ductile iron, alloy cast iron and steel and so on. The first surface of the oil pressure switch is usually chrome plated or molybdenum treatment. Porous chrome layer hardness, and can store a small amount of oil, can improve the lubrication to reduce wear and tear. Molybdenum has a high melting point and also has a porous so that the molybdenum can also improve the wear resistance of the Oil Pressure Switch.