CN203515829U

CN203515829U - Air cylinder sleeve of diesel engine

Info

Publication number: CN203515829U
Application number: CN201320528077.7U
Authority: CN
Inventors: 许媛
Original assignee: CHANGZHOU HRL TOOLS Co Ltd
Current assignee: CHANGZHOU HRL TOOLS Co Ltd
Priority date: 2013-08-27
Filing date: 2013-08-27
Publication date: 2014-04-02
Anticipated expiration: 2023-08-27

Abstract

The utility model relates to an air cylinder sleeve of a diesel engine. The air cylinder sleeve comprises an air cylinder sleeve body, a protruding shoulder, an upper support, two water sealing ring grooves and a lower support are arranged on the air cylinder sleeve body, an inner bush is fixed inside the air cylinder sleeve body, and the inner surface and the outer surface of the inner bush are respectively coated with a layer of wear-resisting carbide. The air cylinder sleeve of the diesel engine can prevent carbonization from occurring on the cylinder wall of a combustion chamber and a piston, so that the service life of the air cylinder sleeve is prolonged.

Description

Cylinder jacket of diesel engine

Technical field

The utility model relates to a kind of cylinder jacket of diesel engine.

Background technique

Cylinder liner is embedded in cylinder block, jointly forms firing chamber, and guide piston to move reciprocatingly with piston, cylinder head.During internal combustion engine, cylinder liner will be born the impact of high temperature and high pressure gas, the thermal stress that cylinder wall internal-external temperature difference produces, and the effect of the side pressure of piston and frictional force and bolt pretightening, operating conditions is very severe.Meanwhile, because piston is done high speed to-and-fro motion in cylinder, and lubricating condition is bad, makes cylinder liner abrasion serious.Cylinder liner adopts that wear resistance is good, casting is convenient conventionally, lower-cost alloy cast iron or spheroidal graphite cast iron manufacture.The more material of application is High phosphorus alloys cast iron or boron cast-iron at present, and it is carried out to high frequency hardening, porous chromium plating, spray platinum or nitriding treatment, to improve its wear resistance.Conventional cylinder liner structurally can be divided into two kinds of dry liner and wet liners.The outer wall of dry liner does not directly contact with cooling medium, and conventionally with the centrifugal manufacture of alloy cast iron, wall thickness is 2-3mm.The cylinder liner good rigidity of this structure, quality is light, and sealing is convenient, and bore spacing is shorter, can make Structure of Internal-Combustion Engine compact; Its shortcoming is dismounting inconvenience, maintenance difficult, and cooling effect is poor, easily produces local deformation, and requirement on machining accuracy is high, and cost is high.The outer wall of wet liner directly contacts with cooling water, and radiating condition is good, conventionally with High phosphorus alloys cast iron, manufactures, and wall thickness is 5-8mm.Wet liner rigidity is poor, easily leaks, but dismounting and easy to maintenance.

In prior art, disclose a kind of cylinder jacket of diesel engine, comprised cylinder liner body, be provided with convex shoulder, upper support, two water seal ring recess and lower support on cylinder liner body, convex shoulder to the distance of water seal ring recess is 120.5-121mm; Distance between two water seal ring recess (3) is: 11.5-12.5mm.This cylinder liner has enough Rigidity and strengths 3 can improve wear resistance and corrosion resistance; Accuracy of manufacturing is high; Can guarantee the reliability of reciprocating motion of the pistons.But cylinder liner, along with the growth of service time, easily produces and ties carbon, longer knot carbon of operating time is just more, and piston is easy the most stuck or by cylinder sleeve drawing crack, directly impact is normal works, and for this reason, the knot carbon phenomenon that need to reduce in casing wall is increased work efficiency.

Summary of the invention

For above-mentioned technical problem, main purpose of the present utility model is to provide a kind of cylinder jacket of diesel engine, and the utility model can prevent firing chamber casing wall and piston knot carbon, and increased the working life of air-casing.

The technological scheme solving the problems of the technologies described above is as follows:

Cylinder jacket of diesel engine, comprises cylinder liner body, is provided with convex shoulder, upper support, two water seal ring recess and lower support on cylinder liner body, fixes a neck bush in described cylinder liner body, all applies the wear-resisting carbide of one deck on the inside and outside surface of neck bush.

Adopt such scheme, in described cylinder liner body, fixed a neck bush, on the inside and outside surface of neck bush, all applied the wear-resisting carbide of one deck.By the described wear-resisting carbide of neck bush and surface thereof, can stop firing chamber casing wall and piston knot carbon, increased the working life of cylinder sleeve.

Further, the two ends of described neck bush form the flange of bending, and neck bush is withheld on the end face of cylinder liner body by flange.This Placement can be integrated neck bush more securely with cylinder liner bulk junction.

Accompanying drawing explanation

Fig. 1 is structural representation of the present utility model;

1 is cylinder liner body, and 2 is convex shoulder, and 3 is upper support, and 4 is water seal ring recess, and 5 is lower support, and 6 is neck bush, and 7 is flange, and 8 is wear-resisting carbide.

Embodiment

With reference to Fig. 1, cylinder jacket of diesel engine of the present utility model, comprise cylinder liner body 1, on cylinder liner body 1, be provided with convex shoulder 2, upper support 3, two water seal ring recess 4 and lower supports 5, described cylinder liner body 1 is interior fixes a neck bush 6, the two ends of described neck bush form the flange 7 of bending, and neck bush 6 is withheld on the end face of cylinder liner body 1 by flange 7.On the inside and outside surface of neck bush 6, all apply the wear-resisting carbide 8 of one deck.

Claims

1. cylinder jacket of diesel engine, comprise cylinder liner body, on cylinder liner body, be provided with convex shoulder, upper support, two water seal ring recess and lower support, it is characterized in that: in described cylinder liner body, fix a neck bush, on the inside and outside surface of neck bush, all apply the wear-resisting carbide of one deck.

2. cylinder jacket of diesel engine according to claim 1, is characterized in that: the two ends of described neck bush form the flange of bending, and neck bush is withheld on the end face of cylinder liner body by flange.