阅读说明：本技术 一种快速增加发动机冲程的冷却结构 (Cooling structure capable of rapidly increasing engine stroke ) 是由 龚灵辉 沈黎明 赵泽汉 于 2020-06-02 设计创作，主要内容包括：本发明涉及一种快速增加发动机冲程的冷却结构,包括机体,机体中开有气缸孔,气缸孔中安装缸套,缸套上部分露出机体顶部,缸套露出部分外周套设垫块,垫块下端加工冷却水道和冷却水道进口,缸套与垫块上方设置气缸垫。本发明结构简单,在发动机适当加大冲程,以达到提升发动机排量的目的。可借用原发动机的机体、缸盖、气缸垫等重要零部件,稍作工艺调整或补充加工即可。具有改动少、冷却性好、投入少,重要件通用性好的特点。(The invention relates to a cooling structure for rapidly increasing the stroke of an engine, which comprises a machine body, wherein a cylinder hole is formed in the machine body, a cylinder sleeve is arranged in the cylinder hole, the upper part of the cylinder sleeve is exposed out of the top of the machine body, a cushion block is sleeved on the periphery of the exposed part of the cylinder sleeve, a cooling water channel and a cooling water channel inlet are processed at the lower end of the cushion block, and a cylinder gasket is arranged above the cylinder sleeve and the cushion. The invention has simple structure, and properly enlarges the stroke of the engine to achieve the aim of improving the engine displacement. The engine body, the cylinder cover, the cylinder gasket and other important parts of the original engine can be used for slight process adjustment or supplementary processing. The method has the characteristics of less modification, good cooling performance, less investment and good universality of important parts.)

1. A cooling structure for rapidly increasing the stroke of an engine, characterized in that: the structure includes organism (5), open in organism (5) has cylinder hole (7), install cylinder liner (2) in cylinder hole (7), the part exposes on cylinder liner (2) organism (5) top, cylinder liner (2) expose partial periphery cover and establish cushion (4), cushion (4) lower extreme processing cooling water course and cooling water course import, cylinder liner (2) with cushion (4) top sets up cylinder gasket (3).

2. The cooling structure for rapidly increasing the stroke of an engine as set forth in claim 1, wherein: organism apopore (6) is processed to organism (5) up end, open bottom cushion (4) has first through-hole of cylinder liner (8), first through-hole of cylinder liner (8) top sets up cylinder liner second through-hole (9), open first through-hole of cylinder liner (8) side has cushion income water hole (10), first through-hole of cylinder liner (8) are through guiding gutter (11) intercommunication cushion income water hole (10), cushion (4) up end is equipped with out rivers groove (12), play rivers groove (12) intercommunication cushion income water hole (10).

3. The cooling structure for rapidly increasing the stroke of an engine as set forth in claim 1, wherein: the cylinder is characterized in that a cylinder sleeve positioning groove is formed in the periphery of the upper portion of the cylinder hole (7), a cylinder sleeve positioning flange is arranged on the periphery of the upper portion of the cylinder sleeve (2), and the cylinder sleeve positioning flange is located in the cylinder sleeve positioning groove.

4. The cooling structure for rapidly increasing the stroke of an engine as set forth in claim 1, wherein: the thickness of the cushion block (4) is consistent with the size of the part, exposed out of the machine body (5), of the cylinder sleeve (2).

5. The cooling structure for rapidly increasing the stroke of an engine as set forth in claim 2, wherein: the width of the diversion trench (11) is 2 +/-1 mm, and the depth is 1 +/-0.5 mm.

6. The cooling structure for rapidly increasing the stroke of an engine as set forth in claim 1, wherein: the thickness of the cushion block (4) is 5-18 mm.

Technical Field

The invention belongs to the technical field of internal combustion engines, and relates to a cooling structure for rapidly increasing the stroke of an engine.

Background

With the continuous improvement of the technical level of the engine, the performance index of the engine is also continuously improved. The method is particularly important for the non-road engine by properly increasing the engine displacement so as to increase the torque value of the engine in a low-speed section.

The emission regulation is continuously upgraded, supercharging and supercharging intercooled starting are widely applied, but in a low-rotating-speed area of an engine, 1000 rpm-1400 rpm is limited in waste gas energy, the rotating speed of a waste gas turbocharger is low, the efficiency of the supercharger is not fully exerted, the torque of the low-speed section of the engine is difficult to improve through the supercharger, and the cost is increased by about 2 times of the price of the original supercharger by adopting a VNT supercharger. Non-road machines, the engine works at a low speed section for a long time, which affects the reliability of the VNT supercharger. The engine body of the original engine is directly designed to be enlarged in stroke, and after the upper end face of the engine body is lifted, a machining line of the engine body cannot pass through the engine body, so that the machining line of the original engine body cannot be used. The core making wire and the processing wire of the machine body casting need to be readjusted and invested, and the investment risk is large.

Disclosure of Invention

The invention aims to provide a cooling structure for rapidly increasing the stroke of an engine, which can solve the problem of high investment risk.

According to the technical scheme provided by the invention: the utility model provides a cooling structure of fast increase engine stroke, includes the organism, it has the cylinder hole to open in the organism, install the cylinder liner in the cylinder hole, the cylinder liner top exposes the organism top, the cylinder liner exposes partial periphery cover and establishes the cushion, cushion lower extreme processing cooling water course and cooling water course import, the cylinder liner with the cushion top sets up the cylinder gasket.

As a further improvement of the invention, a water outlet hole of the machine body is processed on the upper end surface of the machine body, a first through hole of a cylinder sleeve is formed at the bottom of the cushion block, a second through hole of the cylinder sleeve is arranged above the first through hole of the cylinder sleeve, a cushion block water inlet hole is formed on the side surface of the first through hole of the cylinder sleeve, the first through hole of the cylinder sleeve is communicated with the cushion block water inlet hole through a diversion trench, and a water outlet trench is formed on the upper end surface of the cushion block and is communicated with the cushion block water.

As a further improvement of the invention, the periphery of the upper part of the cylinder hole is provided with a cylinder sleeve positioning groove, the periphery of the upper part of the cylinder sleeve is provided with a cylinder sleeve positioning flange, and the cylinder sleeve positioning flange is positioned in the cylinder sleeve positioning groove.

As a further improvement of the invention, the thickness of the cushion block is consistent with the size of the part of the cylinder sleeve exposed out of the engine body.

As a further improvement of the invention, the width of the diversion trench (11) is 2 +/-1 mm, and the depth is 1 +/-0.5 mm.

As a further improvement of the invention, the thickness of the cushion block 4 is 5-18 mm.

The positive progress effects of the invention are as follows:

1. the invention has simple structure and small occupied space; the prototype engine is slightly modified, the stroke of the engine is properly increased to improve the displacement of the engine, the torque value of the engine is improved, and the acceleration performance and the dynamic performance of a low-speed section of the engine are improved. The engine is small in change, the cost is not increased much, the market demand can be met, and the product life cycle of the prototype engine is prolonged.

2. The invention has the characteristics of less modification, good cooling performance, less investment and good universality of important components.

Drawings

FIG. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a schematic view of the upper end surface of the machine body.

Fig. 3 is a schematic structural diagram of the spacer.

Detailed Description

The following further describes embodiments of the present invention with reference to the drawings.

In fig. 1-3, the piston ring assembly comprises a first piston ring 1, a cylinder sleeve 2, a cylinder gasket 3, a cushion block 4, a machine body 5, a machine body water outlet hole 6, a cylinder hole 7, a cylinder sleeve first through hole 8, a cylinder sleeve second through hole 9, a cushion block water inlet hole 10, a diversion trench 11, a water outlet trench 12, a cooling cavity 13 and the like.

As shown in figure 1, the invention relates to a cooling structure for rapidly increasing the stroke of an engine, which comprises a machine body 5, wherein a cylinder hole 7 is formed in the machine body 5, a cylinder sleeve positioning groove is formed in the periphery of the upper part of the cylinder hole 7, a cylinder sleeve 2 is installed in the cylinder hole 7, a cylinder sleeve positioning flange is arranged on the periphery of the upper part of the cylinder sleeve 2, and the cylinder sleeve positioning flange is positioned in the cylinder sleeve positioning groove to complete the positioning of the machine body 5 and the cylinder sleeve 2.

The engine body 5 is the size of the original stroke of the engine, the cylinder sleeve 2 is the size after the stroke is increased, so the upper part of the cylinder sleeve 2 is exposed out of the top of the engine body 5, the length of the cylinder sleeve 2 exposed out of the top of the engine body 5 is consistent with the stroke of the lengthened engine, and other matching sizes, pressing modes and materials of the cylinder sleeve 2 are unchanged, so that the engine cylinder has better follow-up property and universality. The part of the cylinder sleeve 2 exposed out of the top of the engine body 5 is sleeved with the cushion block 4, the thickness h of the cushion block 4 is consistent with the heightened size of the cylinder sleeve 2, the purpose of properly improving the engine displacement is achieved, and the reliability of parts can be guaranteed. The cushion block 4 is reserved with a cooling water hole and a lubricating oil hole communicated with the upper end surface of the machine body 5, and the coordinate position and the aperture of the cushion block are kept consistent. The lower end of the cushion block 4 is provided with a cooling water channel and a cooling water channel inlet, and cooling water is introduced from cooling water of the machine body 5.

Cylinder liner 2 sets up cylinder gasket 3 with 4 tops in the cushion, and the cylinder cap bolt loops through cylinder gasket 3, cushion 4 and twists organism 5, makes cylinder liner 2, cushion 4, 5 three of organism fixed.

As shown in fig. 2, 2 to 3 body water outlet holes 6 are processed on the periphery of each cylinder hole 7 on the upper end surface of the body 5, and the original cooling water in the body is introduced into the cushion block 4. Other holes are avoided at the position of the water outlet hole 6 of the machine body, and a reasonable distance is kept, as shown in figure 2.

As shown in fig. 3, a first cylinder sleeve through hole 8 (dotted line portion) is formed in the bottom of the cushion block 4, a second cylinder sleeve through hole 9 is formed above the first cylinder sleeve through hole 8, the exposed portion of the cylinder sleeve 2 is located in the first cylinder sleeve through hole 8 and the second cylinder sleeve through hole 9, 2-3 cushion block water inlet holes 10 are formed in the side face of the first cylinder sleeve through hole 8, and the cushion block water inlet holes 10 penetrate through the upper end and the lower end of the cushion block 4. The coordinate position of the cushion block water inlet hole 10 is consistent with that of the machine body water outlet hole 6 on the machine body. The second through hole 9 of the cylinder sleeve is in clearance fit with the excircle of the cylinder sleeve 2, and a clearance of 0.5-1 is kept between the second through hole and the excircle of the cylinder sleeve to ensure the circulation of cooling water. The first through hole 8 of the cylinder sleeve is 1-2 mm larger than the second through hole 9 of the cylinder sleeve. The first through hole 8 of cylinder liner communicates 11 one ends of guiding gutter, and the 11 other ends of guiding gutter communicate cushion income water hole 10. Cooling water is introduced into the upper end of the spigot of the cylinder sleeve and the vicinity of the first piston ring 1 through the water channel.

As shown in FIG. 3, a water outlet groove 12 is formed on the upper end surface of the pad 4, and the water outlet groove 12 is communicated with the pad water inlet hole 10. The width and the degree of depth of play rivers groove 12 keep reasonable scope, and play rivers groove 12 dodges with the bolt hole, through the circular arc transition, through the cooling water route of rational arrangement, has reduced 2 heat loads of cylinder liner, promotes the reliability of engine.

First piston ring 1 is established to piston upper portion periphery cover, and the cooling water course has reduced first piston ring 1's heat load, promotes the reliability of engine.

As shown in figure 3, the rest water holes and oil holes of the cushion block 4 are communicated with the original water holes and oil holes on the upper end surface of the machine body, the coordinate size and the diameter size of each hole are kept unchanged, and the function is kept unchanged.

As shown in figure 3, the water holes and oil holes on the upper and lower end surfaces of the cushion block 4 are sealed by adopting a silicon rubber silk screen sealing technology, and the sealing line keeps the width of 2.0 +/-0.5 and the height of 0.07-0.15. The cylinder cover bolt is stressed and screwed, the cylinder cover compresses the cylinder gasket 3, and the cylinder sleeve 2 and the cushion block 4 are respectively compressed on the positioning spigot surface of the machine body 5 and the upper plane of the machine body through the cylinder gasket 3 to play a role in sealing.

This structure patent, engine design changes for a short time, and the cost-push is not much, can satisfy the demand in market again, has prolonged the product life cycle of prototype engine, has avoided the investment risk of earlier organism processing line, and adaptability is good.

The width c1 of the diversion trench 11 is 2 + -1 mm, and the depth h2 is 1 + -0.5 mm.

The thickness h of the cushion block 4 is 5-18 mm.

The working process of the invention is as follows:

cooling water leaves the engine body 5 from a water outlet hole 6 of the engine body, enters the cushion block 4 through a cushion block water inlet hole 10, and partially enters a cooling cavity 13 formed by a first through hole 8 of the cylinder sleeve, a second through hole 9 of the cylinder sleeve and the upper part of the cylinder sleeve 2 from a flow guide groove 11, wherein the upper end of the cooling cavity 13 is sealed by the bottom of the cylinder gasket 3, and the lower end of the cooling cavity is sealed by the top of the engine body 5. The other part enters the water outflow groove 12 to cool the cylinder liner 2.