Match grinding and finish lapping technology for lining and piston in speed controller

Abstract

The invention provides a match grinding and finish lapping technology for a lining and a piston in a speed controller. The match grinding and finish lapping technology comprises the following steps: (1), preliminary finish lapping is conducted on a lining inner circle through an inner circle finish lapping machine, the inner circle precision of the lining is measured with a micrometer, and when the inner circle precision of the lining is measured to be an IT7 level, the preliminary finish lapping process of the lining inner circle is completed; (2), match grinding is conducted on the piston according to the practically-measured lining inner circle size, and when the match grinding lap-joint amount of the piston and the lining is detected to be smaller than 2 micrometers through a lap-jointamount testing platform, match grinding is completed; and (3), the lining and the piston are both installed on a workbench of the same inner circle finish lapping machine, and mutual finish lapping is conducted on an outer circle of the piston and the inner circle of the lining according to the following finish lapping technology parameters: speed of the piston is between 2 m / s and 4 m / s, and thespeed of the lining is between 0.5 m / s and 0.6 m / s. According to the match grinding and finish lapping technology for the lining and the piston in the speed controller, the high matching precision between the lining and the piston is achieved; the piston is matched with the lining more tightly and more reliably; and therefore, the oil leakage amount of the speed controller is decreased, and the service life of the speed controller is prolonged.

Description

technical field [0001] The invention belongs to the technical field of mechanical processing technology, and in particular relates to a matching grinding and fine grinding process for an inner bush and a piston of a governor. Background technique [0002] There are many types of turbine governors, which can be roughly divided into the following types according to the composition of their main components: 1) Mechanical hydraulic governors; 2) Electrohydraulic governors; 3) High oil pressure turbine governors , Mechanical-hydraulic governor and traditional electro-hydraulic governor, its hydraulic components are single-piece, small-batch production mode, and the pressure vessel is an ordinary pressure tank with oil and gas contact, which has a huge gap with modern hydraulic technology. High oil pressure turbine governor ("high oil pressure governor" for short), but the working oil pressure of the high oil pressure governor is generally 10Mpa-16Mpa, according to the pressure cl...

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Problems solved by technology

[0002] There are many types of turbine governors, which can be roughly divided into the following types according to the composition of their main components: 1) Mechanical hydraulic governors; 2) Electrohydraulic governors; 3) High oil pressure turbine governors , Mechanical-hydraulic governor and traditional electro-hydraulic governor, its hydraulic components are single-piece, small-batch production mode, and the pressure vessel is an ordinary pressure tank with oil and gas contact, which has a huge gap with modern hydraulic technology. High oil pressure turbine governor ("high oil pressure governor" for short), but the working oil pressure of the high oil pressure governor is generally 10Mpa-16Mpa, according to the pressure classification of the hydraulic industry, it has not reached "high pressure" The reason why it is called a high oil pressure governor is mainly because advanced and mature high-pressure hydraulic products in the hydraulic industry are fully used in the high oil pressure governor, such as: bladder accumulators for oil and gas separation, High-pressure gear pumps, high-pressure hydraulic cylinders, main pressure distribution valves and auxiliary servomotors, etc., in the production process of the main pressure distribution valves and auxiliary servomotors in the high oil pressure governor, the high oil pressure main distribution of the main pressure distribution valve The matching accuracy of the bush and the main piston and the matching accuracy of the auxiliary valve bush and the needle plug greatly affect the oil leakage inside the governor. Therefore, the existing production process for the bush and the needle plug , the rough grinding and fine grinding of the bush and needle plug are carried out separately, resulting in that the final bush and piston cannot meet the required matching accuracy

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