CN205559094U

CN205559094U - Cylinder head

Info

Publication number: CN205559094U
Application number: CN201620434803.2U
Authority: CN
Inventors: 沈捷; 覃壮革; 覃文
Original assignee: Guangxi Yuchai Machinery Co Ltd
Current assignee: Guangxi Yuchai Machinery Co Ltd
Priority date: 2016-05-12
Filing date: 2016-05-12
Publication date: 2016-09-07
Anticipated expiration: 2026-05-12

Abstract

The utility model discloses a cylinder head, last water jacket and a plurality of rows of valve seat insert holes of being equipped with of cylinder head are arranged the downthehole installation of valve seat insert and are arranged valve seat insert, are equipped with the first recess of circumference on the inner wall in row valve seat insert hole, first recess and water jacket intercommunication. The utility model discloses a cylinder head provides the cooling chamber for carry out direct cooling to row valve seat insert, avoid the exhaust valve and arrange valve seat insert ablating even because of the wearing and tearing that high temperature leads to, make the bridge of the nose district between valve seat insert hole and the sprayer hole also receive even cooling simultaneously, avoid bridge of the nose district because of tired cracking of the week end, improvement valve seat insert and cylinder head's reliability.

Description

Cylinder head

Technical field

This utility model relates to engine art, particularly to a kind of cylinder head.

Background technology

The inlet and outlet door of internal combustion engine forms band, by gazogene with the pairing of Valve seat circle respectively Structure controls valve and is turned on and off with the relative of valve retainer.Valve retainer interference is arranged on the end of cylinder head In valve retainer hole on plate, valve retainer hole, oil injector hole part between any two is commonly called as ridge area. Working medium, in gas in-cylinder combustion, acting, produces High Temperature High Pressure, and valve and valve retainer are directly exposed to high temperature In gases at high pressure, the coolant in cylinder head can only cool down valve retainer indirectly simultaneously, and cooling effect is not good enough, Especially exhaust valve seat insert, exhaust valve and exhaust valve seat insert often cause inordinate wear even ablation because of high temperature, Simultaneously because of inhomogeneous cooling, ridge area often cracks because of week end fatigue.Particularly gas engine etc. The electromotor that ignition temperature is the highest, this problem is more prominent.Current solution is to improve the material of seat ring Performance, or valve distance is pulled open, but it is affected by the restriction of technique, cost and structure, this way Limitation is the biggest.

The information being disclosed in this background section is merely intended to increase general background of the present utility model Understand, and be not construed as recognizing or imply in any form that this information structure is for the general skill in this area Prior art well known to art personnel.

Utility model content

The purpose of this utility model is to provide a kind of cylinder head, thus overcomes existing exhaust valve seat insert cold The defect that the best abrasion, ablation and the ridge area caused cracks.

For achieving the above object, this utility model provides a kind of cylinder head, cylinder head be provided with water jacket and Multiple exhaust valve seat collar aperture, install exhaust valve seat insert, the inwall of exhaust valve seat collar aperture in exhaust valve seat collar aperture Being provided with the first groove of circumference, the first groove connects with water jacket.

Preferably, in technique scheme, position corresponding with the first groove on the outer wall of exhaust valve seat insert Place is provided with the second groove of circumference, and the first groove and the second groove type become the cooling chamber of exhaust valve seat insert.

Preferably, in technique scheme, between the cooling chamber of adjacent two exhaust valve seat inserts or adjacent two It is communicated with passage between the cooling chamber of row's exhaust valve seat insert.

Preferably, in technique scheme, exhaust valve seat insert is provided with joins being much of about the second groove Close section and lower cooperation section.

Compared with prior art, this utility model has the advantages that

Cylinder head of the present utility model provides cooling chamber, for exhaust valve seat insert is directly cooled down, The abrasion even ablation avoiding exhaust valve and exhaust valve seat insert to cause because of high temperature, make simultaneously valve retainer hole with Ridge area between oil injector hole is the most uniformly cooled down, it is to avoid ridge area cracks because the week end is tired, Improve valve retainer and the reliability of cylinder head.

Accompanying drawing explanation

Fig. 1 is the structure chart according to cylinder head of the present utility model.

Fig. 2 is the structure chart according to exhaust valve seat insert of the present utility model.

Main Reference Numerals illustrates:

1-cylinder head, 2-exhaust duct, 3-cooling chamber, 4-communicating passage, 5-exhaust valve seat insert, 51-is upper to be coordinated Section, 52-the second groove, coordinate section, the upper water hole of 6-, 7-Cooling Holes under 53-.

Detailed description of the invention

Below in conjunction with the accompanying drawings, detailed description of the invention of the present utility model is described in detail, but it should reason Solve protection domain of the present utility model not limited by detailed description of the invention.

Explicitly indicate that unless otherwise other, otherwise in entire disclosure and claims, term " bag Include " or its conversion as " comprising " or " including " etc. will be understood to comprise stated element or Ingredient, and do not get rid of other element or other ingredient.

As shown in Figure 1 to Figure 2, according to cylinder head 1 row of being provided with of this utility model detailed description of the invention Air flue 2, upper water hole 6, Cooling Holes 7 and multiple exhaust valve seat collar aperture.

As an embodiment, join as in figure 2 it is shown, the outer wall of exhaust valve seat insert 5 is from top to bottom provided with Close section the 51, second groove 52 and lower cooperation section 53.Upper cooperation section 51 and lower cooperation section 53 and aerofluxus Gate seat collar aperture forms interference fit, makes exhaust valve seat insert 5 be arranged in cylinder head 1.Second groove 52 edge The circumferencial direction of exhaust valve seat insert 5 extends.

As it is shown in figure 1, install exhaust valve seat insert 5 in exhaust valve seat collar aperture.With second in exhaust valve seat collar aperture Groove 52 for position be provided with the first groove of circumference, shape after the first groove and the second groove 52 fastening Cooling chamber 3 circlewise, is looped around exhaust valve seat insert 5 around.And the first groove and cylinder head 1 Cooling Holes 7 connects, say, that coolant flows through cooling chamber 3, directly carries out exhaust valve seat insert 5 cold But.

Preferably, as it is shown in figure 1, between the cooling chamber 3 of adjacent two exhaust valve seat inserts 5 or adjacent two It is communicated with passage 4 between the cooling chamber 3 of row's exhaust valve seat insert 5, makes all cooling chambers 3 be formed complete Cooling duct.

Preferably, cooling chamber 3, upper water hole 6 and Cooling Holes 7 can use machining, it would however also be possible to employ Cast form.

When exhaust valve seat insert 5 is installed, need first exhaust valve seat insert 5 to be put in liquid nitrogen to cool down, low temperature cold After contracting, put into rapidly the exhaust valve seat collar aperture of cylinder head 1.

During electromotor work, coolant, by upper water hole 6, Cooling Holes 7, enters cooling chamber 3, the most right Exhaust valve seat insert cools down, and coolant takes away heat, imports the cooling jacket of cylinder head from Cooling Holes 7.

The aforementioned description to specific illustrative embodiment of the present utility model illustrates that and the mesh of illustration 's.These describe and are not wishing to be defined to this utility model disclosed precise forms, and it will be apparent that According to above-mentioned teaching, can much change and change.Exemplary embodiment is selected and describes Purpose be to explain certain principles of the present utility model and actual application thereof, so that the skill of this area Art personnel be capable of and utilize various different exemplary of the present utility model and various not Same selection and change.Scope of the present utility model is intended to be limited by claims and equivalents thereof.

Claims

1. a cylinder head, described cylinder head is provided with water jacket and multiple exhaust valve seat collar aperture, described aerofluxus Exhaust valve seat insert is installed in gate seat collar aperture, it is characterised in that the inwall of described exhaust valve seat collar aperture is provided with First groove of circumference, described first groove connects with described water jacket.

Cylinder head the most according to claim 1, it is characterised in that the outer wall of described exhaust valve seat insert The upper position the most corresponding with described first groove is provided with the second circumferential groove, described first groove and described Second groove forms the cooling chamber of described exhaust valve seat insert.

Cylinder head the most according to claim 2, it is characterised in that adjacent two described exhaust valve seats It is communicated with passage between the cooling chamber of exhaust valve seat insert between the cooling chamber of circle or described in adjacent two rows.

Cylinder head the most according to claim 2, it is characterised in that described exhaust valve seat insert is provided with About described second groove to being much of cooperation section and lower cooperation section.