CN219654785U

CN219654785U - Skirt elliptical molded line piston for diesel engine

Info

Publication number: CN219654785U
Application number: CN202320411367.7U
Authority: CN
Inventors: 张学文; 曹荣权; 陈年安; 曹丹
Original assignee: Nantong Tongzheng Diesel Engine Co ltd
Current assignee: Nantong Tongzheng Diesel Engine Co ltd
Priority date: 2023-03-07
Filing date: 2023-03-07
Publication date: 2023-09-08
Anticipated expiration: 2033-03-07

Abstract

The utility model belongs to the technical field of diesel engines, and particularly relates to a skirt elliptical molded line piston for a diesel engine. This a skirt oval molded line piston for diesel engine reduces the wearing and tearing of piston skirt through setting up protection device to cushion the connecting rod, improve piston life, make piston and nozzle collide easily when using that has solved among the prior art to influence the life problem of piston, through setting up adapter sleeve and ball, when the wrist pin motion, less wrist pin and the friction between the piston skirt, thereby noise that produces when reducing the use.

Description

Skirt elliptical molded line piston for diesel engine

Technical Field

The utility model relates to the technical field of diesel engines, in particular to a skirt elliptical molded line piston for a diesel engine.

Background

In recent years, with the continuous development and progress of human society, environmental problems have been attracting attention, and the world has become sound and perfected related emission regulations. Along with the stricter national and international emission standards, the diesel engine product must meet the standard emission requirements to obtain the type authentication of related departments and obtain the production permission, so that the diesel engine product has certain market competitiveness and market prospect, a novel low-emission and low-pollution diesel engine is urgently required to be developed, the main moving part piston is one of important influencing factors in influencing the emission performance of the diesel engine, the piston is a core working part of the diesel engine, the head part of the piston is generally designed with a concave combustion chamber structure, and the function is to improve the diesel combustion efficiency of the diesel engine during the operation, so that the combustion is more sufficient, and the effects of energy conservation and emission reduction are achieved.

The existing diesel engine generally adopts an aluminum piston, has light weight, but has the defect of larger compression height, so that the height of the engine is larger; the piston can bear lower temperature, the combustion pressure in the cylinder which can be achieved by the engine is lower, in addition, when the engine is heated up, the aluminum piston can obviously expand due to the difference of thermal expansion of steel materials and aluminum materials, so that the nominal value of the outer diameter of the aluminum piston almost exceeds the inner diameter of the cylinder, and obvious friction power consumption can be caused.

As disclosed in chinese patent CN203847269U, the compression height is smaller by adopting steel material instead of original aluminum material, so that the engine height is reduced, thereby reducing the weight and space requirement of the engine, and at the same time, the diesel engine piston can bear higher temperature, so that the engine can reach higher in-cylinder combustion pressure.

However, the device is easy to collide with the nozzle when in use, thereby influencing the service life of the piston.

For this reason, it is highly desirable to provide a skirt elliptic type linear piston for a diesel engine.

Disclosure of Invention

The utility model aims to provide a skirt elliptical line piston for a diesel engine, which is used for solving the problem that the piston is easy to collide with a nozzle when in use, so that the service life of the piston is influenced.

In order to achieve the above purpose, the present utility model provides the following technical solutions: a skirt elliptical molded line piston for a diesel engine comprises a piston head, wherein a piston skirt is fixedly connected to the bottom of the piston head, and a protection device is arranged inside the piston skirt.

The protection device comprises a connecting sleeve, balls, a graphite layer, a connecting block, a spring and a buffer rod, wherein the connecting sleeve is arranged on the side face of a piston skirt, the balls are arranged inside the connecting sleeve, the graphite layer is arranged on the outer surface of the piston skirt, the connecting block is arranged inside the piston skirt, the spring is fixedly arranged at one end, close to the inner center of the piston skirt, of the connecting block, and the buffer rod is sleeved at the center of the spring.

Preferably, a piston pin is arranged in the piston skirt, a first piston ring is arranged at the upper end of the piston head, a second piston ring is arranged in the middle of the piston head, and a third piston ring is arranged at the lower end of the piston head.

Preferably, the upper surface of the piston head is provided with a groove, and the shape of the groove can be changed according to the shape of the diesel engine, so that the piston can be installed in the diesel engine.

Preferably, the piston skirt is oval, reduces the impact of piston and cylinder wall, and then noise abatement, and the through-hole has been seted up to the left and right sides, the adapter sleeve is installed in two through-holes, is convenient for to the installation of wrist pin.

Preferably, the piston pin passes through the left connecting sleeve and the right connecting sleeve, hard friction between the piston pin and the piston skirt is converted into rolling friction, abrasion of the piston skirt is reduced, service life is prolonged, three annular grooves are formed in the outer surface of the piston head, and the first piston ring, the second piston ring and the third piston ring are arranged in the annular grooves in a distributed mode.

Preferably, the left and right surfaces of the piston skirt are provided with inverted V-shaped grooves, so that the piston is prevented from colliding with the oil nozzle during movement, and the width of the piston skirt is larger than that of the piston head.

Preferably, the connecting block, the spring and the buffer rod are uniformly distributed around the interior of the piston skirt, and when the connecting rod contacts the piston skirt, the spring is compressed through the buffer rod to prevent the connecting rod from impacting the interior of the piston skirt and buffer the connecting rod.

Compared with the prior art, the utility model has the beneficial effects that:

1. this a skirt oval molded line piston for diesel engine reduces the wearing and tearing of piston skirt through setting up protection device to cushion the connecting rod, improve piston life, solved and made piston and nozzle collide when using that proposes among the prior art easily, thereby influence the life problem of piston.

2. According to the skirt elliptical molded line piston for the diesel engine, due to the arrangement of the connecting sleeve and the balls, friction between the piston pin and the piston skirt is reduced when the piston pin moves, so that noise generated during use is reduced.

Drawings

FIG. 1 is a schematic diagram of the overall structure of the present utility model;

FIG. 2 is a schematic view of a protection device according to the present utility model;

FIG. 3 is a schematic view of a connecting sleeve structure of the present utility model;

fig. 4 is a schematic view of the piston head structure of the present utility model.

In the figure: 1. a piston head; 2. a piston skirt; 3. a protection device; 301. connecting sleeves; 302. a ball; 303. a graphite layer; 304. a connecting block; 305. a spring; 306. a buffer rod; 4. a piston pin; 5. a first piston ring; 6. a second piston ring; 7. and a third piston ring.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Referring to fig. 1-4, the present utility model provides a technical solution: a skirt elliptical molded line piston for a diesel engine comprises a piston head 1, wherein the upper surface of the piston head 1 is provided with a groove, the shape of the groove can be changed according to the shape of the diesel engine, so that the piston can be installed in the diesel engine, the bottom of the piston head 1 is fixedly connected with a piston skirt 2, the piston skirt 2 is elliptical, the impact between the piston and the cylinder wall is reduced, the noise is further reduced, and a protection device 3 is arranged in the piston skirt 2

The protection device 3 comprises a connecting sleeve 301, balls 302, a graphite layer 303, a connecting block 304, a spring 305 and a buffer rod 306, wherein the connecting sleeve 301 is arranged on the side face of a piston skirt 2, through holes are formed in the left side and the right side of the piston skirt 2, inverted V-shaped grooves are formed in the left surface and the right surface of the piston skirt 2, a piston is prevented from colliding with an oil nozzle when moving, the width of the piston skirt 2 is larger than that of a piston head 1, the connecting sleeve 301 is arranged in the two through holes, a piston pin 4 is conveniently arranged, the balls 302 are arranged in the connecting sleeve 301, the graphite layer 303 is arranged on the outer surface of the piston skirt 2, the friction is reduced, the connecting block 304 is arranged in the piston skirt 2, the spring 305 is fixedly arranged at one end, close to the inner center of the piston skirt 2, of the connecting block 304, the buffer rod 306 is sleeved on the center of the spring 305, the connecting block 304, the spring 305 and the buffer rod 306 are uniformly distributed around the inner periphery of the piston skirt 2, and the buffer rod 306 compresses the spring 305 so that the connecting rod is buffered, the connecting rod and the inner collision of the piston skirt 2 is reduced.

The piston skirt 2 internally mounted has the piston pin 4, and the piston pin 4 passes two adapter sleeves 301 about, changes the hard friction between piston pin 4 and the piston skirt 2 into rolling friction, reduces the wearing and tearing of piston skirt 2, improves life-span, and first piston ring 5 is installed to piston head 1 upper end, and piston head 1 mid-mounting has second piston ring 6, and piston head 1 lower extreme installs third piston ring 7, and three annular has been seted up to piston head 1 surface, and first piston ring 5, second piston ring 6 and third piston ring 7 are installed in the annular in a distributed manner.

When the piston is used, the first piston ring 5, the second piston ring 6 and the third piston ring 7 are installed in the annular groove formed in the outer surface of the piston head 1, the piston pin 4 penetrates through the connecting sleeve 301 to be installed inside the piston skirt 2, the piston is placed into the diesel engine, the piston avoids the nozzle when in operation through the V-shaped groove formed in the piston skirt 2, the piston is prevented from colliding with the nozzle when in operation, the piston pin 4 is installed in the inner ring of the connecting sleeve 301, friction between the piston pin 4 and the piston skirt 2 is reduced through rotation of the ball 302, and when the connecting rod is in contact with the piston skirt 2, the spring 305 is compressed through the buffer rod 306, so that collision between the connecting rod and the piston skirt 2 is reduced.

It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises an element.

Claims

1. A skirt elliptic line piston for a diesel engine comprising a piston head (1), characterized in that: the bottom of the piston head (1) is fixedly connected with a piston skirt (2), and a protection device (3) is arranged inside the piston skirt (2);

the protection device (3) comprises a connecting sleeve (301), balls (302), a graphite layer (303), a connecting block (304), a spring (305) and a buffer rod (306), wherein the connecting sleeve (301) is arranged on the side face of a piston skirt (2), the balls (302) are arranged inside the connecting sleeve (301), the graphite layer (303) is arranged on the outer surface of the piston skirt (2), the connecting block (304) is arranged inside the piston skirt (2), the spring (305) is fixedly arranged at one end, close to the inner center of the piston skirt (2), of the connecting block (304), and the buffer rod (306) is sleeved at the center of the spring (305).

2. A skirt elliptic line piston for a diesel engine according to claim 1 wherein: piston skirt (2) internally mounted has piston pin (4), first piston ring (5) are installed to piston head (1) upper end, piston head (1) mid-mounting has second piston ring (6), piston head (1) lower extreme is installed third piston ring (7).

3. A skirt elliptic line piston for a diesel engine according to claim 1 wherein: the upper surface of the piston head (1) is provided with a groove, and the shape of the groove can be changed according to the shape of a diesel engine.

4. A skirt elliptic line piston for a diesel engine according to claim 1 wherein: the piston skirt (2) is elliptical, through holes are formed in the left side and the right side, and the connecting sleeve (301) is installed in the two through holes.

5. A skirt elliptic line piston for a diesel engine according to claim 2 wherein: the piston pin (4) penetrates through the left connecting sleeve (301) and the right connecting sleeve (301), three annular grooves are formed in the outer surface of the piston head (1), and the first piston ring (5), the second piston ring (6) and the third piston ring (7) are arranged in the annular grooves in a distributed mode.

6. A skirt elliptic line piston for a diesel engine according to claim 1 wherein: the left surface and the right surface of the piston skirt (2) are provided with inverted V-shaped grooves, and the width of the piston skirt (2) is larger than that of the piston head (1).

7. A skirt elliptic line piston for a diesel engine according to claim 1 wherein: the connecting block (304), the spring (305) and the buffer rod (306) are uniformly distributed around the interior of the piston skirt (2).