Marine plunger matching part

A plunger coupling and marine technology, applied in the field of marine plunger couplings, can solve problems affecting the service life of the plunger coupling, lubricating oil pollution in the camshaft system, easy seizure of the plunger, etc., to avoid heavy oil pollution, Improve production efficiency and prevent seizures
CN102979652AActive Publication Date: 2013-03-20YUYAO SHUCHUN MACHINERY
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Patent Information

Authority / Receiving Office
CN ยท China
Patent Type
Applications(China)
Current Assignee / Owner
YUYAO SHUCHUN MACHINERY
Publication Date
2013-03-20

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Abstract

The invention relates to a marine plunger matching part, which comprises a plunger and a sleeve, wherein an axial center hole is formed in the sleeve; the plunger is movably inserted into the axial center hole, and the plunger and the center hole can slide up and down relatively to fit with each other; an oil filling hole is formed in the sleeve; the upper part of the axial center hole is connected and fitted with an oil-out device; a seal ring is arranged in the axial center hole and pasted on the oil filling hole in a sealing manner; the outer circumference of the sleeve is fitted with at least one first sealing ring which is used for ensuring the sealing property of a low-pressure oil chamber; and the lower part of the sleeve is provided with an oil scraping device in the position fitted with the plunger. According to the invention, the lubricating property of the plunger and the sleeve is improved by forming an additional circular groove in the plunger; the sleeve adopts the axial center hole for sealing and oil discharging; and the machining property is improved, the machining efficiency is increased, while meeting the requirements of high-pressure sealing. The marine plunger matching part has the advantages of novel structure, excellent property, good sealing effect, small volume, precise oil supply, simple structure, easiness in manufacturing, and reliability in spraying.
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Description

technical field

[0001] The invention relates to the technical field of diesel engine accessories, in particular to a marine plunger couple. Background technique

[0002] The fuel injection pump is the core component of the diesel engine, and its main function is to supply high-pressure diesel to the fuel injector according to a certain rule to obtain good spray quality. The plunger coupling is a precision coupling in the fuel injection pump. During the working process, the total stroke of the plunger remains unchanged, and the start time of oil supply is controlled by the time when the surface of the plunger completely covers the oil inlet hole of the sleeve. Yes, the oil supply duration is determined by the distance between the edge of the plunger end face and the edge of the spiral groove, that is, it is controlled by the effective stroke of the plunger. The effective stroke can be changed by rotating the plunger, thereby changing the fuel supply to meet the changing requ...

Claims

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