CN117128081A

CN117128081A - Engine

Info

Publication number: CN117128081A
Application number: CN202210546168.7A
Authority: CN
Inventors: 张易; 朱波; 王义超; 袁国友; 陈兴
Original assignee: Chongqing Zongshen General Power Machine Co Ltd
Current assignee: Chongqing Zongshen General Power Machine Co Ltd
Priority date: 2022-05-20
Filing date: 2022-05-20
Publication date: 2023-11-28

Abstract

The application relates to the technical field of energy conversion devices, and provides an engine, which aims to solve the problem that the service life of the engine is influenced due to poor heat dissipation effect of the engine in the prior art.

Description

Engine

Technical Field

The application relates to the technical field of energy conversion devices, in particular to an engine.

Background

Engines are widely used in various industries as a device capable of converting other forms of energy into mechanical energy. Currently, most of the engines on the market are internal combustion engines, i.e. the heat energy generated when burning fuel is used to convert it into mechanical energy. Engines typically include a cylinder, a crankcase, and a muffler, where fuel, after being combusted during combustion of the cylinder, moves a crankshaft to effect conversion of thermal energy to mechanical energy, and the muffler is capable of reducing noise generated during the process.

Because a large amount of heat is generated in the combustion process, the temperature of the engine is increased, and in order to avoid overheating of the engine, a cooling mechanism is further arranged in the existing engine to cool the engine, so that the temperature of the engine can be always kept within a normal temperature range. In the prior art, the integration and light weight trend of engine products are continuously advancing, and the existing cooling mechanism is a linear cooling mechanism from air inlet to air outlet, so that the heat of the muffler cannot be effectively isolated, and the heat dissipation effect of the existing cooling mechanism is poor, so that the user experience and the service life of the engine are seriously influenced.

Disclosure of Invention

The application aims to provide an engine so as to solve the problem that the service life of the engine is influenced due to poor heat dissipation effect of the engine in the prior art.

The basic scheme provided by the application is as follows: the utility model provides an engine, includes cylinder and silencer, and the silencer is located the cylinder top, and the silencer is provided with the blast pipe, wherein, still including engine housing portion, wind scooper portion and silencer housing portion, the cylinder is located engine housing portion, and engine housing portion communicates with wind scooper portion, is provided with the air intake on the wind scooper portion, sets up the silencer in the silencer housing portion, and silencer housing portion communicates with engine housing portion, is provided with the air outlet on the one side of keeping away from wind scooper portion on the silencer housing portion.

The basic scheme has the beneficial effects that: in the scheme, the engine is sealed by the engine outer cover part, the air guide cover part and the muffler outer cover part, so that after external air enters the engine from the air inlet of the air guide cover part, the external air flows to the air outlet on the muffler outer cover part along the directions of the air guide cover part, the engine outer cover part and the muffler outer cover part and is discharged, on one hand, the air entering the engine can be used for radiating, the radiating effect of the engine is ensured, the service life of the engine is prolonged, on the other hand, the heat of the muffler can be taken away by the air flowing in the muffler outer cover part, the radiating effect of the engine is further improved, the combustion noise in the running process of the engine can be blocked by the muffler outer cover part, and the noise reduction effect is improved; finally, in this scheme, still set up the air outlet with be away from the one side of wind scooper portion, prolonged the flow stroke of air in the engine, be favorable to improving the radiating effect, can prolong the life of engine.

Further, the air outlet is positioned at one side of the muffler outer cover part away from the air guide cover part. The beneficial effects are that: because the cylinder can send great noise in the use, so in this scheme, set up the air outlet in the one side of keeping away from the cylinder can the noise abatement.

Further, the inner surface of the muffler outer cover part is an arc-shaped surface. The beneficial effects are that: in this scheme, the setting of arcwall face can let the air flow more smooth in silencer dustcoat portion inside to reduce the loss that appears when the air flows in silencer dustcoat portion.

Further, the engine is provided with a crankshaft connected with the engine in the crankcase, and a cooling fan driven by the crankshaft is arranged in the wind scooper. The beneficial effects are that: in this scheme, utilize bent axle drive cooling fan, need not to set up cooling fan's driving source additionally, can reduce the manufacturing cost of engine.

Further, the air guide cover part is provided with a plurality of air flow distribution parts. The beneficial effects are that: in this scheme, the setting of a plurality of air current distribution portion can be with the inside air direction of engine different heat dissipation demand parts to fully dispel the heat to the inside heat of engine, guaranteed the radiating effect.

Further, be provided with the aviation baffle between silencer and crankcase body and the cylinder, still include the first air current guiding outlet that supplies aviation baffle upper and lower both sides intercommunication. The beneficial effects are that: in this scheme, the setting of aviation baffle separates the inside silencer of engine and crankcase on the one hand, has carried out high temperature isolation, can avoid the heat of silencer to cause the influence to the crankcase.

Further, the muffler cover portion is an arc-shaped cover portion. The beneficial effects are that: in this scheme, set up silencer dustcoat portion into arc dustcoat portion back, after the air enters into the silencer, can flow around the silencer spiral in silencer dustcoat portion under the direction effect of arc dustcoat portion, flow through the air outlet at last, at the in-process that flows around the silencer, can fully take out the heat of silencer, realize the heat dissipation to the silencer.

Further, the exhaust pipe passes through the first air flow guiding port. The beneficial effects are that: in this scheme, the setting that the blast pipe passed first air current guiding outlet can avoid the aviation baffle to the interference of blast pipe mounted position, also need not the space that the additional setting supplies the blast pipe to set up on the aviation baffle simultaneously, has improved the application of first air current guiding outlet.

Further, a first airflow outlet is formed between the air deflector and the engine housing or the air deflector. The beneficial effects are that: in this scheme, utilize the space formation first air current air outlet between aviation baffle and engine housing portion or the air guide cover portion to guide the air current of aviation baffle lower part into aviation baffle upper portion, in order to realize cooling effect, simple structure.

Further, a second air flow outlet is formed between the air deflector and the engine outer cover or the air deflector, and the second air flow outlet and the first air flow outlet are respectively positioned at two ends of the same side of the muffler. The beneficial effects are that: in this scheme, the setting of second air current guiding outlet can be with the different ends of air current direction silencer respectively to can the silencer carry out more abundant heat dissipation, thereby further prolonged the life of engine.

Further, one air flow distributing part faces the first air flow guiding outlet, and one air flow distributing part faces the second air flow guiding outlet. The beneficial effects are that: in the scheme, one air flow distribution part is arranged towards the first air flow guide outlet, so that the exhaust pipe and the muffler are cooled; after one air flow distribution part is arranged towards the second air flow outlet, the muffler is cooled, and the structure is simple.

Further, the outer edge of the air guiding cover part forms an air flow distribution part along a curved surface which extends reversely to the direction of the air inlet and gradually widens. The beneficial effects are that: in this scheme, adopt the mechanism of wind scooper portion self to set up the air current distribution portion, need not extra spare part to can save the manufacturing cost of engine.

Further, the air flow distribution part includes a first air flow distribution part extending to the lower part of the cylinder with the lower part of the air guiding cover part rotating. The beneficial effects are that: in this scheme, the setting of first air current distribution portion can be with air current direction cylinder lower part to dispel the heat to the cylinder, simple structure.

Further, the muffler further includes a guide plate that covers the exhaust pipe and extends toward the muffler, and the guide plate and the first air flow distribution portion form a first cooling passage of the cylinder, the exhaust pipe, and the muffler on a side away from the cooling fan. The beneficial effects are that: in this scheme, the setting of first cooling channel can lead the air current of first air current distribution portion to cool off cylinder, blast pipe and the silencer of keeping away from cooling fan one side, simple structure.

Further, the air deflector is located at one end above the cylinder and forms a second cooling passage with the first air flow distributing portion facing the side and upper portion of the cylinder on the side of the cooling fan. The beneficial effects are that: in this scheme, the setting of second cooling channel can be with the partial air current direction cylinder lateral part of first air current distribution portion and upper portion to cool off cylinder lateral part and upper portion, simple structure.

Further, the air flow distributing part further includes a second air flow distributing part rotatably extending from the end of the first air flow distributing part to the second air flow guiding outlet. The beneficial effects are that: in this scheme, utilize second air current distribution portion can be with the inside air current of engine smooth direction second air current export, simple structure.

Further, a flow dividing plate is provided at the second air flow guiding port to divide the second air flow guiding port into a third cooling passage toward the crankcase body and a fourth cooling passage toward the muffler. The beneficial effects are that: in this scheme, utilize the setting of flow distribution plate to realize the cooling to crankcase body and silencer, simple structure.

Further, the airflow distribution part further includes a third airflow distribution part extending from the second airflow distribution part to the bottom of the crankcase body. The beneficial effects are that: in this scheme, the setting of third air current distribution portion can be with air current direction crankcase bottom of the body to realize the heat dissipation to crankcase bottom of the body, simple structure.

Further, a vent hole is provided at or between the crankcase body bottom and the engine cover portion, and the engine cover portion and the crankcase body bottom form a fifth cooling passage. The beneficial effects are that: in this scheme, the setting of fifth cooling channel can be with air current direction crankcase bottom of the body to realize the cooling operation to crankcase bottom of the body, make crankcase bottom of the body can be cooled down well, thereby reduced the temperature of storing in the internal lubricating oil of crankcase, make the operation of engine more reliable and stable.

Further, the cooling fan also comprises a volute arranged on the opposite side of the cooling fan, and a rotating disk linked with the crankshaft is arranged in the volute. The beneficial effects are that: in this scheme, the setting of spiral case carousel in can be to the cooling air current that overflows from air current distribution portion suction in order to realize recycling cooling air current, simple structure.

Further, the volute includes a pilot outlet that faces either the first airflow outlet or the second airflow outlet. The beneficial effects are that: in this scheme, the setting of guiding the export can be with the cooling air flow that is sucked in the spiral case smooth direction first air current export or second air current export in order to cool off the muffler, simple structure.

Further, the air deflector and the engine cover portion located on one side of the rotary disk form a guide outlet. The beneficial effects are that: in this scheme, there is aviation baffle and the engine housing portion that is located rotary disk one side forms the guide export, need not additionally set up the guide to can practice thrift the manufacturing cost of engine.

Drawings

FIG. 1 is a schematic illustration of an engine embodiment of the present application;

FIG. 2 is a cross-sectional view A-A of FIG. 1;

FIG. 3 is a cross-sectional view B-B of FIG. 1;

FIG. 4 is a cross-sectional view of C-C of FIG. 2;

FIG. 5 is a schematic flow diagram of the air flow in the fifth cooling channel of FIG. 3;

FIG. 6 is a schematic flow diagram of the air flow in the third cooling channel of FIG. 3;

fig. 7 is a schematic view of a wind scooper.

Detailed Description

The following is a further detailed description of the embodiments:

reference numerals in the drawings of the specification include: the engine includes a crankcase body 1, a cylinder 2, a muffler 3, an exhaust pipe 3a, a hood 4, an intake port 4a, a cooling fan 5, an engine housing 6, a muffler housing 7, an air outlet 7a, an air deflector 8, a first air outlet 9, a second air outlet 10, a first air distribution portion 11, a deflector 12, a first cooling passage 13, a second cooling passage 14, a second air distribution portion 15, a deflector 16, a starter motor 17, a third cooling passage 18, a fourth cooling passage 19, a third air distribution portion 20, a vent 21, a fifth cooling passage 22, a volute 23, a guide outlet 23a, and a rotary disk 24.

The direction of the arrows in fig. 2-6 are the direction of airflow.

The embodiment is basically as shown in the accompanying figures 1-4: an engine includes a cylinder 2, a crankcase 1, and a muffler 3; the cylinder 2 is obliquely arranged above the crankcase body 1, and a crankshaft connected with the engine is arranged in the crankcase body 1; the cylinder 2 communicates with a muffler 3 through an exhaust pipe 3a, and the muffler 3 is located above the cylinder 2 and extends above the cylinder 2 and the crankcase body 1.

Still including the dustcoat, the dustcoat includes wind scooper portion 4, engine dustcoat portion 6 and silencer dustcoat portion 7, cylinder 2 is located engine dustcoat portion 6, engine dustcoat portion 6 communicates with wind scooper portion 4, be provided with air intake 4a on the wind scooper portion 4, set up silencer 3 in the silencer dustcoat portion 7, silencer dustcoat portion 7 communicates with engine dustcoat portion 6, one side that keeps away from cylinder 2 on the silencer dustcoat portion 7 is provided with air outlet 7a, air outlet 7a is located one side that the wind scooper portion 4 was kept away from to silencer dustcoat portion 7, silencer dustcoat portion 7 internal surface is the arcwall face. By such arrangement, combustion noise of the engine and operation noise of the gas distribution structure are blocked in the muffler housing portion 7, and at the same time, since the muffler 3 on the side close to the cylinder 2 is the most heat generating place, heat radiation on the side close to the cylinder 2 and the entire muffler 3 body is facilitated by the side far from the cylinder 2 by the air outlet 7 a. As shown in fig. 7, the air intake passage in the air guide cover 4 is gradually widened in the arrow direction in the air guide cover 4.

A cooling fan 5 is provided in the air guide cover portion 4, and the cooling fan 5 guides cooling air through an air inlet 4a to cool and dissipate heat from high-heat components such as the crankcase 1 and the cylinder 2.

An air deflector 8 is arranged between the muffler 3 and the crankcase body 1 and between the muffler 3 and the cylinder 2, and the air deflector 8 can isolate the heat influence of the muffler 3 on the cylinder 2 and the crankcase body 1 while guiding the air flow in the engine outer cover 6 and the muffler outer cover 7.

The air guide plate 8 is provided with a first air flow guide outlet 9 which is communicated with the upper side and the lower side of the air guide plate 8, the first air flow guide outlet 9 is positioned on one side of the muffler 3 away from the air guide cover part 4, and in the embodiment, one side of the air guide plate 8 and the engine outer cover part 6 or the air guide cover part 4 form the first air flow guide outlet 9, and the first air flow guide outlet 9 accommodates the exhaust pipe 3a and is opposite to one side of the muffler 3.

A second air flow outlet 10 is also formed between the air deflector 8 and the engine housing part 6 or the air deflector part 4, the second air flow outlet 10 and the first air flow outlet 9 are respectively positioned at two ends on the same side of the muffler 3, and the second air flow outlet 10 is positioned at the opposite side of the exhaust pipe 3 a.

The air guiding cover part 4 is provided with a plurality of air flow distribution parts, one of which faces the first air flow guiding outlet 9 and one of which faces the second air flow guiding outlet 10. Specifically, the outer edge of the air guiding cover portion 4 forms an air flow distribution portion with a curved surface that extends reversely to the air inlet direction of the air guiding cover portion on the air guiding cover portion 4 and gradually widens, in this embodiment, three air flow distribution portions are provided on the air guiding cover portion 4, namely, a first air flow distribution portion 11 that extends to the lower portion of the cylinder 2 in a rotating manner at the lower portion of the air guiding cover portion 4, a second air flow distribution portion 15 that extends from the end of the first air flow distribution portion 11 to the second air flow outlet 10 in a rotating manner, and a third air flow distribution portion 20 that extends from the second air flow distribution portion 15 to the bottom of the crankcase body 1. In this embodiment, the air guiding cover portion adopts an air guiding cover portion in an air guiding system of an air-cooled engine with application number 201911138790.9, the air guiding cover portion includes a revolving body shell, the revolving body shell is enclosed by at least two involute lines arranged along the same direction, the involute lines longitudinally extend to form a curved surface, and the curved surface and the air guiding cover portion are outwards extended to form an air flow distribution portion.

Further comprises a guide plate 12 covering the exhaust pipe 3a and extending in the direction of the muffler 3, the guide plate 12 and the first air flow distributing part 11 forming a first cooling passage 13 of the cylinder 2, the exhaust pipe 3a and the muffler 3 on the side away from the cooling fan 5. The air deflector 8 is located at one end above the cylinder 2 and forms a second cooling passage 14 with the first air flow distributing portion 11 at the side and upper portion of the cylinder 2 facing the cooling fan 5 side.

That is, the first air flow distribution portion 11 extends in the direction of rotation of the air flow to the lower portion of the cylinder 2 with the lower portion of the air guide cover portion 4 as the start end and is connected to the guide plate 12 by ventilation, the guide plate 12 covers the exhaust duct 3a and extends toward the muffler 3, so that the first air flow distribution portion 11, which forms the first cooling passage 13 for cooling the cylinder 2 on the side away from the cooling fan 5, the exhaust duct 3a, and the muffler 3 with the first air flow distribution portion 11, continues to pass through the side portion of the cylinder 2 in the direction of air flow and ends at the upper portion of the cylinder 2, one end of the air guide plate 8 is disposed in clearance with the upper portion of the cylinder 2, forms the second cooling passage 14 for cooling the side portion and the upper portion of the cylinder 2 on the side facing the cooling fan 5, and the air flowing through the first cooling passage 13 and the second cooling passage 14 is discharged from the first air flow outlet 9, thereby cooling the exhaust duct 3a and the muffler 3, and then is discharged through the air outlet 7 a.

The second air flow outlet 10 is further provided with a flow dividing plate 16 dividing the second air flow outlet 10 into a third cooling passage 18 toward the crankcase body 1 and a fourth cooling passage 19 toward the muffler 3, as shown in fig. 3 and 6. That is, the second air flow distribution portion 15 starts from the end of the first air flow distribution portion 11 and extends to the second air flow guiding out opening 10 in the direction of rotation of the air flow, a flow dividing plate 16 is provided at the second air flow guiding out opening 10, the flow dividing plate 16 is provided to guide part of the cooling air flow to the crankcase body 1 to form a third cooling passage 18 that cools the crankcase body 1, and the other part of the cooling air flow is guided by the flow dividing plate 16 to the second air flow guiding out opening 10 to form a fourth cooling passage 19 that cools the muffler 3. Specifically, in the present embodiment, the third cooling passage 18 is directed to the starter motor 17 provided in the crankcase body 1, so that cooling of the starter motor 17 is achieved, and in other embodiments, the third cooling passage 18 may be provided to other electric parts.

A vent hole 21 is provided at the bottom of the crankcase body 1 or between the bottom of the crankcase body 1 and the engine cover 6, and the engine cover 6 and the bottom of the crankcase body 1 form a fifth cooling passage 22. That is, the third air flow distribution portion 20 is provided with the vent hole 21 at the bottom of the crankcase body 1 or between the bottom of the crankcase body 1 and the engine housing portion 6, starting from the end of the second air flow distribution portion 15, and extending to the corresponding position of the bottom of the crankcase body 1 in the direction of rotation of the air flow, and the third air flow distribution portion 20 and the vent hole 21 form a fifth cooling passage 22 for cooling the bottom of the crankcase body 1, and by this arrangement, the bottom of the crankcase body 1 is well cooled, as shown in fig. 5, thereby reducing the temperature of the lubricating oil stored in the crankcase body 1, and making the operation of the engine more stable and reliable.

The cooling fan comprises a cooling fan 5, a spiral casing 23 arranged on the opposite side of the cooling fan, and a rotating disk 24 linked with a crankshaft is arranged in the spiral casing 23; the volute 23 includes a pilot outlet 23a, the pilot outlet 23a facing the second airflow outlet 10; the guide outlet 23a of the scroll 23 is constituted by the air deflector 8 and the engine housing 6 located on the side of the rotary disk 24. By such a design, the cooling air flows that are overflowed from the first air flow distributing portion 11, the second air flow distributing portion 15, and the third air flow distributing portion 20, respectively, are sucked by the rotary disk 24, then sequentially pass through the guide outlet 23a, the second air flow guiding outlet 10 to cool the muffler 3, and finally are discharged through the air outlet 7a provided in the muffler housing portion 7.

The foregoing is merely an embodiment of the present application, and a specific structure and characteristics of common knowledge in the art, which are well known in the scheme, are not described herein, so that a person of ordinary skill in the art knows all the prior art in the application date or before the priority date, can know all the prior art in the field, and has the capability of applying the conventional experimental means before the date, and a person of ordinary skill in the art can complete and implement the present embodiment in combination with his own capability in the light of the present application, and some typical known structures or known methods should not be an obstacle for a person of ordinary skill in the art to implement the present application. It should be noted that modifications and improvements can be made by those skilled in the art without departing from the structure of the present application, and these should also be considered as the scope of the present application, which does not affect the effect of the implementation of the present application and the utility of the patent. The protection scope of the present application is subject to the content of the claims, and the description of the specific embodiments and the like in the specification can be used for explaining the content of the claims.

Claims

1. An engine, includes cylinder and silencer, the silencer is located the cylinder top, the silencer is provided with blast pipe, its characterized in that: still including engine housing portion, wind scooper portion and silencer dustcoat portion, the cylinder is located in the engine housing portion, engine housing portion with wind scooper portion intercommunication, be provided with the air intake on the wind scooper portion, set up in the silencer dustcoat portion the silencer, silencer dustcoat portion with engine housing portion intercommunication, keep away from on the silencer dustcoat portion one side of wind scooper portion is provided with the air outlet.

2. An engine as set forth in claim 1 wherein: the air outlet is positioned at one side of the muffler outer cover part far away from the air cylinder.

3. An engine as set forth in claim 2 wherein: the inner surface of the muffler outer cover part is an arc-shaped surface.

4. An engine according to any one of claims 1-3, wherein: the engine is characterized by further comprising a crankcase body, a crankshaft connected with the engine is arranged in the crankcase body, and a cooling fan driven by the crankshaft is arranged in the wind scooper.

5. An engine as set forth in claim 1 wherein: the air guiding cover part is provided with a plurality of air flow distribution parts.

6. An engine as set forth in claim 5 wherein: an air deflector is arranged between the muffler and the crankcase body and between the muffler and the air cylinder, and the muffler further comprises a first airflow guiding outlet for communicating the upper side and the lower side of the air deflector.

7. An engine as set forth in claim 6 wherein: the muffler outer cover part is an arc-shaped outer cover part.

8. An engine as set forth in claim 7 wherein: the exhaust pipe passes through the first airflow outlet.

9. An engine according to any one of claims 6-8, characterized in that: the first airflow outlet is formed between the air deflector and the engine housing part or the air deflector part.

10. An engine as set forth in claim 9 wherein: and a second airflow outlet is formed between the air deflector and the engine outer cover part or between the air deflector and the air deflector part, and the second airflow outlet and the first airflow outlet are respectively positioned at two ends of the same side of the muffler.

11. An engine as set forth in claim 10 wherein: one air flow distribution part faces the first air flow guiding outlet, and one air flow distribution part faces the second air flow guiding outlet.

12. An engine as set forth in claim 11 wherein: the outer edge of the air guiding cover part and a curved surface which extends reversely towards the air inlet and gradually widens to form the air flow distribution part.

13. An engine as set forth in claim 12 wherein: the air flow distribution part comprises a first air flow distribution part which extends from the lower part of the air guide cover part to the lower part of the air cylinder in a rotating way.

14. An engine as set forth in claim 13 wherein: the cooling fan further comprises a guide plate which covers the exhaust pipe and extends towards the muffler, and the guide plate and the first air flow distribution part form a first cooling channel of the cylinder, the exhaust pipe and the muffler, which are far away from one side of the cooling fan.

15. An engine as set forth in claim 14 wherein: the air deflector is located at one end above the cylinder and forms a second cooling passage with the first air flow distributing part facing the side and upper part of the cylinder at one side of the cooling fan.

16. An engine according to any one of claims 13-15, characterized in that: the air flow distribution portion further includes a second air flow distribution portion rotatably extending from the end of the first air flow distribution portion to the second air flow outlet.

17. An engine as set forth in claim 16 wherein: the second air flow guiding outlet is further provided with a flow dividing plate which divides the second air flow guiding outlet into a third cooling channel facing the crankcase body and a fourth cooling channel facing the muffler.

18. An engine according to claim 16 or 17, wherein: the airflow distribution portion further includes a third airflow distribution portion extending from the second airflow distribution portion to the bottom of the crankcase body.

19. An engine as set forth in claim 18 wherein: and a vent hole is formed in the bottom of the crankcase body or between the bottom of the crankcase body and the engine outer cover part, and a fifth cooling channel is formed between the engine outer cover part and the bottom of the crankcase body.

20. An engine as set forth in claim 4 wherein: the cooling fan is characterized by further comprising a volute arranged on the opposite side of the cooling fan, and a rotating disk linked with the crankshaft is arranged in the volute.

21. An engine as set forth in claim 20 wherein: the volute includes a pilot outlet facing the first airflow pilot outlet or the second airflow pilot outlet.

22. An engine as set forth in claim 21 wherein: the air deflector and the engine housing part positioned at one side of the rotating disk form the guide outlet.