CN205805746U - A kind of novel piston head construction - Google Patents

Abstract

The utility model discloses a kind of novel piston head construction, it is characterized in that between piston crown and piston skirt, be provided with piston ring groove and piston ring；It is provided above buffer piston ring bank at described piston ring groove.Buffer piston ring bank is arranged on the position of 8 15 millimeters above piston crown cylindrical top-ring groove.Buffer piston ring bank is a high boss of 0.3 0.6 millimeters.High temperature gas flow guide cylinder can be overlapped inwall by boss, forms eddy current and quickly reduces temperature, makes first annular groove and piston ring work in the environment of being maintained at stable relative low temperature, be substantially improved the state of wear of surface of piston ring groove and piston ring.It can in addition contain the carbon distribution of cylinder liner internal wall is struck off by acute angle; and by air-flow, carbon distribution is discharged; this avoid the generation of carbon distribution blocked up, too much; effectively protect piston ring groove and this anti-wear performance to parts of piston ring; decrease the generation of mechanical breakdown, extend piston and the service life of piston ring.

Description

A kind of novel piston head construction

Technical field

This utility model relates to a kind of engine piston technical field, specifically one can slow down piston ring groove abrasion, Improve the novel piston head construction in piston service life.

Background technology

Piston is the nucleus movement parts of electromotor, and work under bad environment, intensity is big.The piston of electromotor, piston ring, cylinder Set is that in combustor, secondary parts are joined in three most important frictions, and from the point of view of structure, any one wear extent of these parts is big, all The air-tightness that can cause electromotor reduces, and burning deteriorates, and power reduces.In combustion chamber components, abrasion the most seriously piston Annular groove and piston ring position, the abrasion of first annular groove is the most serious.It is boundary lubrication between piston ring groove and piston ring, and profit Sliding situation is poor, and especially first annular groove lubricating condition is worst, and contact stress and impulsive force are bigger.When electromotor does work, The working condition of piston and piston ring is quite severe, high temperature to be born, high pressure and shock loading, therefore, and piston ring groove and piston The primary friction of ring is in use, piston ring axial impact in piston ring groove and radial direction and the complicated fortune of circumference Dynamic, all can cause the increase of abrasion, cause piston seal effect and mechanical efficiency to reduce.Ultimately result in the piston that must more renew And piston ring.Causing surface of piston ring groove and the serious principal element of piston ring scuffing is first annular groove and piston ring The adverse circumstances of specific position.Electromotor currently on the market, in order to promote the power of its electromotor, constantly improves outburst pressure Power, the central temperature of chamber temperature field has reached about 460 DEG C, and edge is the most also at 340-380 DEG C.The temperature of the first annular groove General requirement should be less than 200 DEG C, and temperature often rises 10 DEG C, and lubricating oil carbide sharply increases, and makes lubricating oil not have due Lubricant effect, causes the quick-wearing excessively of piston first annular groove and piston ring.Piston crown, cylinder liner internal wall is at high-temperature fuel gas Under environment, also can produce more carbon distribution, carbon distribution not only accelerates the abrasion of piston ring groove and piston ring, and when carbon distribution is too much very Stuck to making piston ring move in piston ring groove, cause piston ring breakage, cause mechanical accident.Especially for boats and ships bavin Oil machine, combustion heavy oil (poor oil) explosion pressure is higher, and the present the highest detonation pressure of marine diesel engine majority has reached 17-22Mpa, has Even up to more than 25Mpa.

Utility model content

The purpose of this utility model is to provide a kind of novel piston head construction, to solve to propose in above-mentioned background technology Problem.

For achieving the above object, the following technical scheme of this utility model offer:

A kind of novel piston head construction, is provided with piston ring groove and piston ring between piston crown and piston skirt； Described piston ring groove is provided above buffer piston ring bank.

As further program of the utility model: described buffer piston ring bank is arranged on piston crown cylindrical first and lives The position of 8-15 millimeter above plug ring groove.

As this utility model further scheme: described buffer piston ring bank is the convex of a high 0.3-0.6 millimeter Platform.

Compared with prior art, the beneficial effects of the utility model are:

This novel piston head construction is provided with boss, and high temperature gas flow guide cylinder can be overlapped inwall by boss, forms eddy current Quickly reduce temperature, make first annular groove and piston ring work in the environment of being maintained at stable relative low temperature, be substantially improved work Plug ring rooved face and the state of wear of piston ring, improve this anti-wear performance to friction pair, extends piston and the use of piston ring Life-span.Additionally the carbon distribution of cylinder liner internal wall can also be struck off by this piston crown structure by acute angle, and is incited somebody to action by air-flow Carbon distribution is discharged, and this avoid the generation of carbon distribution blocked up, too much, effectively protect piston ring groove and piston ring this to friction pair Anti-wear performance, decreases the generation of mechanical breakdown, extends piston and the service life of piston ring.

Accompanying drawing explanation

Fig. 1 is the single-piece piston structural representation using novel piston head construction.

Fig. 2 is the built-up piston steel roof construction schematic diagram using novel piston head construction.

Fig. 3 is the structural representation at X position in Fig. 1 and Fig. 2.

In figure: 1-piston-top surface, 2-piston crown, 3-piston skirt, 4-buffer piston ring case, 5-piston ring groove, 6-lives Plug ring, 7-piston boss, 8-steel top end face.

Detailed description of the invention

Below in conjunction with the accompanying drawing in this utility model embodiment, the technical scheme in this utility model embodiment is carried out Clearly and completely describe, it is clear that described embodiment is only a part of embodiment of this utility model rather than whole Embodiment.Based on the embodiment in this utility model, those of ordinary skill in the art are not under making creative work premise The every other embodiment obtained, broadly falls into the scope of this utility model protection.

Embodiment 1

Refer to Fig. 1 and 3, in this utility model embodiment, a kind of single-piece piston using novel piston head construction, bag Including piston-top surface 1, piston crown 2, piston skirt 3 and piston boss 7, described piston crown 2 is positioned at piston-top surface 1 and piston skirt Between portion 3；Described piston boss 7 is positioned at the middle part of piston opotism 3；It is provided with work between piston crown 2 and piston skirt 3 Plug ring groove 5 and piston ring 6；Described piston ring groove 5 is provided above buffer piston ring bank 4, and buffer piston ring bank 4 is arranged on piston The position of 8-15 millimeter above head 2 cylindrical top-ring groove 5；

Embodiment 2

Referring to Fig. 2 and 3, a kind of built-up piston steel roof construction using novel piston head construction, at steel top end face 1 The position of downside is also equipped with piston ring groove 5, piston ring 6 and is arranged on 8-above piston crown cylindrical top-ring groove 5 The buffer piston ring bank 4 of 15 millimeters of positions；

Described buffer piston ring bank 4 is the boss of a high 0.3-0.6 millimeter；This boss can be by high temperature gas flow guide cylinder Set inwall, forms eddy current and quickly reduces temperature, so that first annular groove and piston ring are maintained at the ring of stable relative low temperature Working under border, be substantially improved the state of wear of surface of piston ring groove and piston ring, additionally this boss can also be by acute angle to gas The carbon distribution of inboard wall of cylinder liner strikes off, and is discharged by carbon distribution by air-flow, this avoid the generation of carbon distribution blocked up, too much, has Effect protects piston ring groove and this anti-wear performance to friction pair of piston ring, decreases the generation of mechanical breakdown, extend piston and The service life of piston ring.

It is obvious to a person skilled in the art that this utility model is not limited to the details of above-mentioned one exemplary embodiment, and And in the case of without departing substantially from spirit or essential attributes of the present utility model, it is possible to realize this practicality in other specific forms new Type.Therefore, no matter from the point of view of which point, all should regard embodiment as exemplary, and be nonrestrictive, this practicality is new The scope of type is limited by claims rather than described above, it is intended that by the containing of equivalency in claim that fall All changes in justice and scope are included in this utility model.Should not be considered as any reference in claim limiting Involved claim.

Although moreover, it will be appreciated that this specification is been described by according to embodiment, but the most each embodiment only wraps Containing an independent technical scheme, this narrating mode of description is only that for clarity sake those skilled in the art should Description can also be formed those skilled in the art through appropriately combined as an entirety, the technical scheme in each embodiment May be appreciated other embodiments.

Claims (3)

1. a novel piston head construction, it is characterised in that be provided with work between piston crown (2) and piston skirt (3) Plug ring groove (5) and piston ring (6)；Described piston ring groove (5) is provided above buffer piston ring bank (4).

Novel piston head construction the most according to claim 1, it is characterised in that described buffer piston ring bank (4) is arranged Position at piston crown cylindrical top-ring groove (5) top 8-15 millimeter.

Novel piston head construction the most according to claim 2, it is characterised in that described buffer piston ring bank (4) is one The boss of individual high 0.3-0.6 millimeter.