CN219061863U

CN219061863U - Lightweight piston and engine

Info

Publication number: CN219061863U
Application number: CN202320211202.5U
Authority: CN
Inventors: 陈实现; 王丁; 高田田; 朱桂香
Original assignee: Weichai Power Co Ltd
Current assignee: Weichai Power Co Ltd
Priority date: 2023-02-14
Filing date: 2023-02-14
Publication date: 2023-05-23
Anticipated expiration: 2033-02-14

Abstract

The utility model belongs to the technical field of engines, and discloses a lightweight piston and an engine. The lightweight piston comprises a piston head and a piston skirt, the top of the piston skirt is connected to the bottom of the piston head, a lightening hole is formed in the piston skirt and is communicated with the inner cavity of the lightweight piston and the outer portion of the lightweight piston, the inner cavity of the lightweight piston is formed by surrounding the piston head and the piston skirt, a heat conducting unit is arranged in the lightening hole, and the heat conducting unit is connected with the hole wall of the lightening hole, which is close to the piston head, and the hole wall, which is far away from the piston head. The heat conduction unit is arranged in the lightweight piston lightening hole and used for connecting the hole wall of the lightening hole close to the piston head with the hole wall far away from the piston head, so that heat above the lightening hole can be effectively conducted to the lower part of the lightening hole in the use process of the lightweight piston, and the phenomenon that the temperature of the piston head is too high due to accumulation of heat of the piston head above the lightening hole is avoided.

Description

Lightweight piston and engine

Technical Field

The utility model relates to the technical field of engines, in particular to a lightweight piston and an engine.

Background

The piston is an important component of the engine, the weight of the piston greatly influences the performance of the engine, and the larger the weight of the piston is, the larger the reciprocating inertial force and friction force generated by the piston when the piston and the connecting rod run at high speed are, and the more the power of the engine is lost. The existing engine piston adopts a solid structure near the piston pin hole, which is unfavorable for reducing the quality of the piston, so that the power loss cannot be effectively reduced, and the oil consumption of the engine cannot be effectively reduced.

Accordingly, there is a need for a lightweight piston and engine that addresses the above-described issues.

Disclosure of Invention

The utility model aims to provide a lightweight piston and an engine, which reduce the weight of the lightweight piston and avoid the excessive temperature of the lightweight piston.

To achieve the purpose, the utility model adopts the following technical scheme:

a lightweight piston comprising:

a piston head;

the piston skirt, its top connect in the bottom of piston head, be provided with the lightening hole on the piston skirt, the lightening hole intercommunication the inner chamber of lightweight piston with the outside of lightweight piston, be provided with the heat conduction unit in the lightening hole, the heat conduction unit connects the lightening hole is close to the pore wall of piston head with keep away from the pore wall of piston head.

Preferably, a plurality of lightening holes are provided, and a plurality of lightening holes are provided at intervals along the circumferential direction of the lightweight piston.

Preferably, the piston skirt is provided with a piston pin hole, the two sides of the piston pin hole are provided with the lightening holes, and the extending direction of the lightening holes is parallel to the axial direction of the piston pin hole.

Preferably, the wall of the lightening hole comprises a first wall surface, a second wall surface and a third wall surface, the first wall surface, the second wall surface and the third wall surface are all plane surfaces, the first wall surface, the second wall surface, the third wall surface and the second wall surface are all connected through arc surfaces, the first wall surface and the second wall surface are vertically arranged, and the third wall surface is arranged on one side, close to the lightening hole, of the first wall surface and the second wall surface.

Preferably, the heat conduction unit includes:

a connection part;

the upper connecting rod is connected between the first wall surface and the connecting part;

the lower connecting rod is connected between the second wall surface and the connecting part and between the third wall surface and the connecting part.

Preferably, the upper connecting rods are provided with a plurality of upper connecting rods, a plurality of lower connecting rods are connected between the second wall surface and the connecting parts and between the third wall surface and the connecting parts, two adjacent upper connecting rods are arranged at an included angle, and two adjacent lower connecting rods are arranged at an included angle.

Preferably, the piston head is provided with a ring groove surrounding the lightweight piston in a circumferential direction of the lightweight piston.

Preferably, a plurality of the ring grooves are provided at intervals along an axial direction of the lightweight piston.

Preferably, a plurality of the heat conduction units are arranged in the lightening holes.

An engine comprising a lightweight piston as claimed in any one of the preceding claims.

The utility model has the beneficial effects that:

the lightweight piston comprises a piston head and a piston skirt, wherein the top of the piston skirt is connected to the bottom of the piston head, a lightening hole is formed in the piston skirt, the lightening hole is communicated with an inner cavity of the lightweight piston and the outside of the lightweight piston, the inner cavity of the lightweight piston is formed by surrounding the piston head and the piston skirt, a heat conducting unit is arranged in the lightening hole, and the heat conducting unit is connected with the hole wall of the lightening hole close to the piston head and the hole wall far away from the piston head. The weight reducing holes are formed in the skirt portion of the piston, so that the weight of the lightweight piston is reduced, the power loss is effectively reduced, and the oil consumption of an engine is further effectively reduced. And be provided with the heat conduction unit of connecting the pore wall that the lightening hole is close to the piston head and keep away from the pore wall of piston head in the lightening hole to in lightweight piston use, the heat of lightening hole top can effectively be conducted to the lightening hole below, avoids the heat of piston head to gather in the top of lightening hole and leads to the piston head too high temperature. In addition, the lightening hole communicates the inner cavity of the lightweight piston with the outside of the lightweight piston, so that the lubricant can flow between the inner cavity and the outer surface of the lightweight piston conveniently, and the lubrication effect of the lightweight piston is improved.

Drawings

FIG. 1 is a schematic view of a lightweight piston according to an embodiment of the present utility model;

FIG. 2 is an enlarged view at A in FIG. 1;

FIG. 3 is a schematic diagram of a lightweight piston according to an embodiment of the present utility model;

fig. 4 is an enlarged view at B in fig. 3;

FIG. 5 is a top view of a lightweight piston provided by an embodiment of the present utility model;

fig. 6 is a schematic structural view of a heat conduction unit of a lightweight piston according to an embodiment of the present utility model;

fig. 7 is a thermodynamic simulation schematic diagram of a lightweight piston without a heat conducting unit according to an embodiment of the present utility model;

fig. 8 is a thermodynamic simulation schematic diagram of a lightweight piston provided with a heat conducting unit according to an embodiment of the present utility model.

In the figure:

1. a piston head; 11. a ring groove;

2. a piston skirt;

21. a lightening hole;

211. a first wall surface; 212. a second wall surface; 213. a third wall surface;

22. a piston pin hole;

3. a heat conduction unit;

31. an upper connecting rod; 32. and a lower connecting rod.

Detailed Description

The utility model is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the utility model and are not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the structures related to the present utility model are shown in the drawings.

In the description of the present utility model, unless explicitly stated and limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

In the present utility model, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "right", and the like are based on the orientation or positional relationship shown in the drawings, and are merely for convenience of description and simplicity of operation, and do not indicate or imply that the apparatus or element in question must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the utility model. Furthermore, the terms "first," "second," and the like, are used merely for distinguishing between descriptions and not for distinguishing between them.

As shown in fig. 1 to 6, the present embodiment provides a lightweight piston including a piston head 1 and a piston skirt 2.

As shown in fig. 1-5, the top of the piston skirt 2 is connected to the bottom of the piston head 1, the piston skirt 2 is provided with a lightening hole 21, the lightening hole 21 is communicated with the inner cavity of the lightweight piston and the outside of the lightweight piston, the inner cavity of the lightweight piston is surrounded by the piston head 1 and the piston skirt 2, a heat conducting unit 3 is arranged in the lightening hole 21, and the heat conducting unit 3 is connected with the hole wall of the lightening hole 21 close to the piston head 1 and the hole wall far away from the piston head 1.

The weight of the lightweight piston is reduced by providing the weight reducing hole 21 on the piston skirt 2, so that the power loss is effectively reduced, and the engine oil consumption is further effectively reduced. And be provided with the heat conduction unit 3 of connecting the pore wall that the lightening hole 21 is close to piston head 1 and keep away from the pore wall of piston head 1 in lightening hole 21 to in lightening piston use, the heat above the lightening hole 21 can effectively be conducted to lightening hole 21 below, avoids piston head 1's heat to gather in lightening hole 21's top and leads to piston head 1 high temperature. The lightening hole 21 communicates the inner chamber of the lightweight piston with the outside of the lightweight piston, and thus facilitates the flow of lubricant between the inner chamber and the outer surface of the lightweight piston, and improves the lubrication effect of the lightweight piston.

Alternatively, as shown in fig. 4, a plurality of heat conduction units 3 are provided in each of the lightening holes 21, further improving the heat conduction effect to the lightening holes 21.

Alternatively, as shown in fig. 1 and 3, a plurality of lightening holes 21 are provided, and a plurality of lightening holes 21 are provided at intervals in the circumferential direction of the lightweight piston, thereby improving the lightening effect on the lightweight piston.

Alternatively, as shown in fig. 1 and 3, the piston skirt 2 is provided with a piston pin hole 22, and both sides of the piston pin hole 22 are provided with weight-reducing holes 21, and the extending direction of the weight-reducing holes 21 is parallel to the axial direction of the piston pin hole 22. The lightening holes 21 are provided so as to avoid the heat radiation oil passage inside the lightweight piston, and in this embodiment, the lightening holes 21 are provided on both sides of the piston pin hole 22 because no heat radiation oil passage is provided near the lightweight piston pin hole 22. In other embodiments, the number, position, and size of the lightening holes 21 may be adjusted according to the specific arrangement of the radiating oil passages.

Alternatively, as shown in fig. 1 to 4, the wall of the lightening hole 21 includes a first wall 211, a second wall 212 and a third wall 213, the first wall 211, the second wall 212 and the third wall 213 are all planar, the first wall 211 and the second wall 212, the second wall 212 and the third wall 213 and the first wall 211 and the third wall 213 are all connected by circular arc surfaces, the radius of the circular arc surfaces ranges from 0.5 mm to 1.5mm, the first wall 211 and the second wall 212 are arranged vertically, and the third wall 213 is arranged on one side of the first wall 211 and the second wall 212 close to the lightening hole 21. Specifically, in the present embodiment, the first wall surface 211 is disposed perpendicular to the axis of the lightweight piston, and the second wall surface 212 is disposed parallel to the axis of the lightweight piston. Thereby increasing the size of the lightening hole 21 as much as possible without affecting the arrangement of the radiating oil passage to reduce the weight of the lightweight piston.

Alternatively, as shown in fig. 1 to 4 and 6, the heat conduction unit 3 includes a connection part, an upper connection rod 31, and a lower connection rod 32. An upper connecting rod 31 is connected between the first wall surface 211 and the connecting portion. The lower connecting rod 32 is connected between the second wall surface 212 and the connecting portion and between the third wall surface 213 and the connecting portion. The heat above the lightening hole 21 of the lightweight piston can be conducted to the connection portion through the upper connection rod 31 and then to the second wall surface 212 and the third wall surface 213 at both sides of the lightening hole 21 through the lower connection rod 32, respectively.

Optionally, as shown in fig. 1-4 and fig. 6, a plurality of upper connecting rods 31 are provided, a plurality of lower connecting rods 32 are connected between the second wall surface 212 and the connecting portion and between the third wall surface 213 and the connecting portion, an included angle is formed between two adjacent upper connecting rods 31, and an included angle is formed between two adjacent lower connecting rods 32, so as to improve the heat conducting effect of the heat conducting unit 3.

Specifically, as shown in fig. 4, in the present embodiment, the heat conduction unit 3 is provided with four upper connection bars 31 and four lower connection bars 32, the four upper connection bars 31 each connect the first wall surface 211 and the connection portion, two of the four lower connection bars 32 connect the second wall surface 212 and the connection portion, and the other two connect the third wall surface 213 and the connection portion, so that the heat conduction unit 3 uniformly conducts heat to the second wall surface 212 and the third wall surface 213.

The length, width and height of the heat conducting unit 3 are set according to the needs, and are preferably 10-30 mm. The specific shapes of the connection portion, the upper connection bar 31 and the lower connection bar 32 may be set as desired.

Specifically, in the present embodiment, the connection portion is spherical, and the upper connection rod 31 and the lower connection rod 32 are both cylindrical. The diameter of the connecting part is 1-5mm, and the radius of the cross section of the upper connecting rod 31 and the lower connecting rod 32 is 1-3mm.

Alternatively, as shown in fig. 1 and 3, the piston head 1 is provided with a ring groove 11 surrounding the lightweight piston in the circumferential direction thereof, the ring groove 11 being for mounting a piston ring. The plurality of ring grooves 11 are provided at intervals in the axial direction of the lightweight piston.

As shown in fig. 7, which is a thermodynamic simulation effect diagram of the operation process of the lightweight piston without the heat conduction unit 3, fig. 8 is a thermodynamic simulation effect diagram of the operation process of the lightweight piston with the heat conduction unit 3;

as can be seen from fig. 7 and 8, the maximum temperature during the operation of the lightweight piston in which the heat conduction unit 3 is not provided is 415.6 ℃, while the maximum temperature during the operation of the lightweight piston in which the heat conduction unit 3 is provided is 345.3 ℃, and the thermodynamic simulation result shows that the provision of the heat conduction unit 3 has a significant effect on reducing the maximum temperature of the lightweight piston.

The embodiment also provides an engine comprising the lightweight piston.

It is to be understood that the above examples of the present utility model are provided for clarity of illustration only and are not limiting of the embodiments of the present utility model. Various obvious changes, rearrangements and substitutions can be made by those skilled in the art without departing from the scope of the utility model. It is not necessary here nor is it exhaustive of all embodiments. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the utility model are desired to be protected by the following claims.

Claims

1. Lightweight piston, its characterized in that includes:

a piston head (1);

piston skirt (2), its top connect in the bottom of piston head (1), be provided with lightening hole (21) on piston skirt (2), lightening hole (21) intercommunication the inner chamber of lightweight piston with the outside of lightweight piston, be provided with heat conduction unit (3) in lightening hole (21), heat conduction unit (3) connect lightening hole (21) are close to the pore wall of piston head (1) with keep away from the pore wall of piston head (1).

2. The lightweight piston as claimed in claim 1, wherein a plurality of the lightening holes (21) are provided, and a plurality of the lightening holes (21) are provided at intervals along the circumferential direction of the lightweight piston.

3. The lightweight piston according to claim 2, characterized in that the piston skirt (2) is provided with a piston pin bore (22), both sides of the piston pin bore (22) are provided with the lightening bores (21), and the lightening bores (21) extend in a direction parallel to the axial direction of the piston pin bore (22).

4. The lightweight piston according to claim 1, wherein the wall of the lightening hole (21) includes a first wall surface (211), a second wall surface (212) and a third wall surface (213), the first wall surface (211), the second wall surface (212) and the third wall surface (213) are all planar, the first wall surface (211) and the second wall surface (212), the second wall surface (212) and the third wall surface (213) and the first wall surface (211) and the third wall surface (213) are all connected by arc surfaces, the first wall surface (211) and the second wall surface (212) are vertically arranged, and the third wall surface (213) is arranged on one side of the first wall surface (211) and the second wall surface (212) close to the lightening hole (21).

5. The lightweight piston as claimed in claim 4, characterized in that the heat conducting unit (3) comprises:

a connection part;

an upper connecting rod (31), wherein the upper connecting rod (31) is connected between the first wall surface (211) and the connecting part;

and a lower connecting rod (32), wherein the lower connecting rod (32) is connected between the second wall surface (212) and the connecting part and between the third wall surface (213) and the connecting part.

6. The lightweight piston according to claim 5, wherein a plurality of upper connecting rods (31) are provided, a plurality of lower connecting rods (32) are connected between the second wall surface (212) and the connecting portion and between the third wall surface (213) and the connecting portion, and two adjacent upper connecting rods (31) are arranged at an included angle, and two adjacent lower connecting rods (32) are arranged at an included angle.

7. A lightweight piston as claimed in claim 1, characterized in that the piston head (1) is provided with a ring groove (11) surrounding the lightweight piston in its circumferential direction.

8. The lightweight piston as claimed in claim 7, characterized in that a plurality of said ring grooves (11) are provided at intervals along the axial direction of the lightweight piston.

9. A lightweight piston as claimed in any one of claims 1-8, characterized in that a plurality of said heat conducting units (3) are arranged in each of said lightening bores (21).

10. An engine comprising a lightweight piston as claimed in any one of claims 1 to 9.