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

A speed governor and bushing technology, which is applied in the direction of grinding devices, grinding machine tools, manufacturing tools, etc., can solve the problem that the bushing and piston cannot meet the required matching accuracy, achieve tight cooperation, increase service life, and reduce oil leakage volume effect

Inactive Publication Date: 2019-05-14
TIANJIN YUANYUAN SYNTHETIC TECH DEV CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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

Method used

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

Examples

Experimental program
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Effect test

Embodiment 1

[0031] Example 1 Matching Grinding and Finishing Technology of High Oil Pressure Main Matching Bushing and Main Matching Piston

[0032] Such as figure 1 The schematic diagram of the structure of the high oil pressure main matching bushing and the matching main matching piston shown in , first install the high oil pressure main matching bushing on the inner circle lapping machine, Roughly grind the circle, and measure the bushing after 5 seconds of rough grinding. When the measured margin for fine grinding after rough grinding is 20 microns, smooth grind the inner circle of the bush after rough grinding. The inner circle of the bush is finely trimmed and finely ground by the grinding wheel. After fine grinding, it is polished for 2 seconds. When the inner circle accuracy of the bush is measured to reach the IT7 level, the preliminary fine grinding process of the inner circle of the bush is completed. After the fine grinding, the high oil pressure main The surface roughness of...

Embodiment 2

[0033] Example 2 Matching grinding and finishing process of high oil pressure punching main matching bushing and main matching piston

[0034] Such as figure 2The structural diagram of the high oil pressure punching main matching bush and the matching main matching piston shown in , firstly install the high oil pressure punching main matching bush The inner circle of the main matching bush is roughly ground, and the bush is measured after rough grinding for 5 seconds. Grinding, after smooth grinding, carry out fine dressing and fine grinding on the inner circle of the bushing, and smooth grinding for 2 seconds after the fine grinding. After grinding, the inner surface roughness of the high oil pressure punched main matching bush is 0.5, and the inner diameter is 23.013mm. According to the measured size of the high oil pressure main matching bush, the main matching piston is matched and ground. After rough grinding, the piston has a grinding amount of 150 microns and then en...

Embodiment 3

[0035] Example 3 Matching Grinding and Finishing Technology of Auxiliary Valve Bushing and Needle Plug

[0036] Such as image 3 The schematic diagram of the auxiliary valve bushing and the matching needle plug shown in , first install the auxiliary valve bushing on the inner circle lapping machine, and rough grind the inner circle of the auxiliary valve, and then grind the bushing after 5 seconds Carry out the measurement, when it is measured that the margin left for fine grinding after rough grinding is 20 microns, carry out smooth grinding on the inner circle of the bush after rough grinding, and carry out fine dressing and fine grinding on the inner circle of the bush after smooth grinding, After fine grinding, smooth grinding for 2 seconds, when the measured inner circle accuracy of the bush reaches IT7 level, the preliminary fine grinding process of the inner circle of the bush is completed. After fine grinding, the surface roughness of the inner circle of the auxiliary ...

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PUM

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B24B37/02B24B49/00
Inventor 王士珍
Owner TIANJIN YUANYUAN SYNTHETIC TECH DEV CO LTD
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