CN210370929U

CN210370929U - Novel combustion chamber structure piston of national third/national fourth diesel engine

Info

Publication number: CN210370929U
Application number: CN201921229313.9U
Authority: CN
Inventors: 芮志英
Original assignee: Anhui Tianwo Heavy Industry Machinery Co ltd
Current assignee: Anhui Tianwo Heavy Industry Machinery Co ltd
Priority date: 2019-08-01
Filing date: 2019-08-01
Publication date: 2020-04-21
Anticipated expiration: 2029-08-01

Abstract

The utility model discloses a novel four diesel engine pistons in combustion chamber structure state three/state, including piston body and combustion chamber, the piston body includes piston head and skirt portion, the combustion chamber is located the piston crown portion, the piston head is fixed on the skirt portion, first gas ring groove, second gas ring groove and oil ring groove have been seted up from top to bottom in proper order to the piston head outer wall, the cooling oil pocket has been seted up in the piston head, the fixed high manganese steel layer that is equipped with in piston crown portion, high manganese steel layer external fixed surface is equipped with the wear-resisting alloy steel layer, wear-resisting alloy steel layer external fixed surface is equipped with the zirconia ceramic layer. Has the advantages that: the mechanical strength and the high temperature resistance of the piston head can be greatly increased, so that the piston body can bear larger mechanical stress and high temperature, is not easy to deform and is not easy to corrode.

Description

Novel combustion chamber structure piston of national third/national fourth diesel engine

Technical Field

The utility model relates to a diesel engine piston field particularly, relates to a novel combustion chamber structure state three/four diesel engine pistons in state.

Background

In recent years, with the continuous development and progress of human society, environmental problems are attracting people's attention, and countries around the world are gradually perfected and related emission regulations are perfected. With the stricter and stricter national and international emission standards, the diesel engine products must meet the standard emission requirements to obtain the type certification of relevant departments and obtain the production permission, so that a novel diesel engine with low emission and low pollution is urgently needed to be developed to ensure that the diesel engine products have certain market competitiveness and market prospect. Among the many factors that affect the emission performance of diesel engines, the piston, which is the main moving part, is one of the more important influencing factors.

With increasing performance and/or consumption optimization of internal combustion engines, thermal and mechanical stresses acting on the piston also increase, and therefore, the strength and high temperature resistance of the piston need to be increased.

An effective solution to the problems in the related art has not been proposed yet.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a novel combustion chamber structure state three/four diesel engine pistons in state to solve the problem that proposes among the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides a novel four diesel engine pistons in combustion chamber structure state three/state include piston body and combustion chamber, the piston body includes piston head and skirt portion, the combustion chamber is located the piston crown portion, the piston head is fixed on the skirt portion, first gas ring groove, second gas ring groove and oil ring groove have been seted up in proper order from top to bottom to the piston head outer wall, the cooling oil pocket has been seted up in the piston head, the fixed high manganese steel layer that is equipped with in piston crown portion, high manganese steel layer external fixed surface is equipped with the wear-resisting alloy steel layer, the fixed surface of wear-resisting alloy steel layer is equipped with the zirconia ceramic layer.

Furthermore, the cooling oil cavity is of an annular structure, the cross section of the cooling oil cavity is of a pear-shaped structure, and the cooling oil cavity is connected with an oil inlet hole and an oil outlet hole.

Furthermore, a vertical cavity is formed in the skirt portion, the skirt portion is provided with a transverse shaft hole, and the skirt portion is communicated with the shaft hole.

Furthermore, a reinforcing cylinder is fixedly arranged on the inner wall of the shaft hole.

Furthermore, a retainer is fixedly arranged in the first air ring groove.

Furthermore, the center of the top of the piston head is provided with a bulge, and an annular groove is formed in the periphery of the bulge.

Further, the piston head and the skirt are both made of a copper-nickel-magnesium-aluminum alloy material.

Compared with the prior art, the utility model discloses following beneficial effect has:

(1) the utility model discloses a set up high manganese steel layer, wear-resisting alloy steel layer and zirconia ceramic layer, the mechanical strength and the high temperature resistance ability of the increase piston head that can be very big degree to make the piston body can bear bigger mechanical stress and high temperature, and be difficult for taking place to warp, also difficult being corroded.

(2) The utility model discloses a set up inlet port and oil outlet, can be used for the oiling and the play oil of cooling oil pocket.

(3) The utility model discloses a set up the shaft hole and consolidate a section of thick bamboo, can increase the mechanical strength in shaft hole for the difficult emergence in shaft hole is out of shape.

(4) The utility model discloses a set up the protective shroud, can reduce in the combustion chamber gas leakage to the crankcase to improve thermal conversion efficiency.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a piston of a new combustion chamber structure of a domestic third/fourth diesel engine according to an embodiment of the present invention;

fig. 2 is a top cross-sectional view of a piston head in a new combustion chamber configuration of a domestic three/four diesel engine piston according to an embodiment of the present invention.

Reference numerals:

1. a piston body; 2. a combustion chamber; 3. a piston head; 4. a skirt portion; 5. a first gas ring groove; 6. a second gas ring groove; 7. an oil ring groove; 8. cooling the oil cavity; 9. a high manganese steel layer; 10. a wear-resistant alloy steel layer; 11. a zirconia ceramic layer; 12. an oil inlet hole; 13. an oil outlet hole; 14. a cavity; 15. a shaft hole; 16. a reinforcement cylinder; 17. a retainer; 18. a protrusion; 19. and (4) a groove.

Detailed Description

The following, with reference to the drawings and the detailed description, further description of the present invention is made:

the first embodiment is as follows:

please refer to fig. 1-2, according to the embodiment of the present invention, the novel combustion chamber structure of the piston of the domestic three/domestic four diesel engine includes a piston body 1 and a combustion chamber 2, the piston body 1 includes a piston head 3 and a skirt portion 4, the combustion chamber 2 is located at the top of the piston head 3, the piston head 3 is fixed on the skirt portion 4, the outer wall of the piston head 3 has sequentially disposed a first gas ring groove 5, a second gas ring groove 6 and an oil ring groove 7 from top to bottom, a cooling oil chamber 8 is disposed in the piston head 3, a high manganese steel layer 9 is fixed at the top of the piston head 3, the outer surface of the high manganese steel layer 9 is fixed with a wear-resistant alloy steel layer 10, and the outer surface of the wear-resistant alloy steel layer 10 is fixed with a.

Through the above technical scheme of the utility model, the mechanical strength and the high temperature resistance ability of increase piston head 3 that can be very big degree to make piston body 1 can bear bigger mechanical stress and high temperature, and be difficult for taking place to warp, also difficult being corroded.

Example two:

referring to fig. 1, for a cooling oil cavity 8, the cooling oil cavity 8 is of an annular structure and has a pear-shaped cross section, and the cooling oil cavity 8 is connected with an oil inlet 12 and an oil outlet 13; for the skirt portion 4, a vertical cavity 14 is formed in the skirt portion 4, a transverse shaft hole 15 is formed in the skirt portion 4, and the skirt portion 4 is communicated with the shaft hole 15; for the shaft hole 15, a reinforcing cylinder 16 is fixedly arranged on the inner wall of the shaft hole 15.

Through the above technical scheme of the utility model, inlet port 12 and oil outlet 13 can be used for the oiling of cooling oil pocket 8 and go out oil, and shaft hole 15 is used for installing the bent axle, consolidates a section of thick bamboo 16 and can increase the mechanical strength in shaft hole 15 for shaft hole 15 is difficult for taking place to warp.

Example three:

referring to fig. 1, for the first gas ring groove 5, a retainer 17 is fixedly disposed in the first gas ring groove 5; for the piston head 3, a protrusion 18 is arranged at the top center of the piston head 3, and an annular groove 19 is arranged on the circumference of the protrusion 18; for the piston head 3, both the piston head 3 and the skirt 4 are made of a copper-nickel-magnesium-aluminum alloy material.

Through the above technical scheme of the utility model, installation compression ring is used for sealed steam in protective shroud 17, can reduce in 2 interior gas leakage crankcases of combustion chamber to improve heat conversion efficiency, copper nickel magnesium aluminum alloy material has the good characteristic that the quality is light, hardness is high, can keep piston body 1 to have sufficient intensity, rigidity, the quality is little, light in weight, in order to guarantee minimum inertial force.

For the convenience of understanding the technical solution of the present invention, the following detailed description is made on the working principle or the operation mode of the present invention in the practical process.

In practical application, zirconia ceramic layer 11 has melting point and high boiling point, hardness is big, non-deformable and difficult advantage corroded, make piston head 3 top have high temperature resistant, shock-resistant, non-deformable and difficult good performance corroded, wear-resisting alloy steel layer 10 has extremely strong hardness, wear-resisting alloy steel is a type of special properties steel that is used for the wearing and tearing operating mode, its leading features has higher intensity under the wearing and tearing condition, hardness toughness and wearability, the mechanical strength and the high temperature resistance of increase piston head 3 that can very big degree, thereby make piston body 1 can bear bigger mechanical stress and high temperature, and be difficult for taking place to warp, also difficult by the corruption.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a novel combustion chamber structure state three/state four diesel engine piston, a serial communication port, including piston body (1) and combustion chamber (2), piston body (1) includes piston head (3) and skirt portion (4), combustion chamber (2) are located piston head (3) top, piston head (3) are fixed on skirt portion (4), first gas ring groove (5), second gas ring groove (6) and oil ring groove (7) have been seted up from top to bottom in proper order to piston head (3) outer wall, cooling oil pocket (8) have been seted up in piston head (3), fixed high manganese steel layer (9) that are equipped with in piston head (3) top, high manganese steel layer (9) fixed surface is equipped with wearing alloy steel layer (10), wearing alloy steel layer (10) fixed surface is equipped with zirconia ceramic layer (11).

2. The piston of the new type combustion chamber structure GuoSansi/GuoQuel diesel engine as claimed in claim 1, wherein said cooling oil chamber (8) is of an annular structure and has a pear-shaped cross section, and said cooling oil chamber (8) is connected with an oil inlet (12) and an oil outlet (13).

3. The piston of the new combustion chamber structure of the national third/national fourth diesel engine according to claim 1, characterized in that a vertical cavity (14) is formed in the skirt portion (4), and the skirt portion (4) is provided with a transverse shaft hole (15), and the skirt portion (4) is communicated with the shaft hole (15).

4. The piston of the new type combustion chamber structure GuoSansi/GuoQu diesel engine according to claim 3, characterized in that a reinforcing cylinder (16) is fixedly arranged on the inner wall of the shaft hole (15).

5. The piston of the new combustion chamber structure guo san i si o u i n i.

6. The novel combustion chamber structure piston of the domestic three/domestic four diesel engine is characterized in that a protrusion (18) is arranged at the center of the top of the piston head (3), and an annular groove (19) is formed in the circumferential direction of the protrusion (18).

7. The new combustion chamber structure piston of the domestic three/domestic four diesel engine according to claim 6, characterized in that the piston head (3) and the skirt portion (4) are both made of copper-nickel-magnesium-aluminum alloy material.