CN219281835U

CN219281835U - Box body of single-cylinder diesel engine

Info

Publication number: CN219281835U
Application number: CN202320698552.9U
Authority: CN
Inventors: 陈国祥; 王纯孟
Original assignee: Sichuan Cementhai Machinery Co ltd
Current assignee: Sichuan Cementhai Machinery Co ltd
Priority date: 2023-04-03
Filing date: 2023-04-03
Publication date: 2023-06-30
Anticipated expiration: 2033-04-03

Abstract

The utility model provides a box body of a single-cylinder diesel engine, which comprises a back plate, a cavity shell, a cylinder head and a bottom plate, wherein a motor mounting hole and a crankshaft supporting hole are formed in the back plate; the cavity shell is sequentially provided with an outer shell, a water containing cavity and an inner shell from outside to inside, and the bottom end of the inner shell is hermetically connected with the bottom plate to divide the water containing cavity into a left half cavity and a right half cavity; the bottom of the left half cavity is connected with a water inlet pipe, and the bottom of the right half cavity is connected with a water outlet pipe; the cylinder head is internally provided with a spiral channel surrounding the piston hole, and the inlet and outlet of the spiral channel are respectively communicated with the top of the left half cavity and the top of the right half cavity. Through the water containing cavity and the spiral channel which are mutually communicated, cooling water can circulate, the temperature rise of the cavity shell and the cylinder head in the working process of the diesel engine can be taken away, the water cooling heat dissipation of the box body is realized, the heat dissipation effect is improved, and the service life of lubricating oil in the box body is prolonged.

Description

Box body of single-cylinder diesel engine

Technical Field

The utility model relates to the technical field of diesel engines, in particular to a box body of a single-cylinder diesel engine.

Background

The single-cylinder diesel engine is widely used as main matched power for hand tractors, small four-wheel tractors, agricultural tricycles, four-wheel vehicles, agricultural irrigation and drainage, small ships, small engineering machinery, small generators, and agricultural and sideline processing machinery due to the advantages of compact structure, high cost performance, convenient use and maintenance and the like.

In the working process of the single-cylinder diesel engine, the piston reciprocates up and down along a piston hole in the cylinder head of the diesel engine box body to drive a crankshaft in the diesel engine box body to continuously rotate so as to realize acting on the outside. Generally, the temperature of a single-cylinder diesel engine box body is higher in the working process, and if the single-cylinder diesel engine box body is not subjected to cooling treatment in time, the reliability and stability of a diesel engine can be reduced, and finally the diesel engine is caused to break down.

At present, the existing single-cylinder diesel engine box body only has heat dissipation ribs at the periphery of the cylinder head, takes away heat on the cylinder head in a natural air cooling mode, is poor in heat dissipation effect due to the fact that the side wall of the cylinder head is thicker, meanwhile, the temperature inside the box body cannot realize effective heat dissipation, so that lubricating oil inside the box body is in an environment with overhigh temperature for a long time, and the service life of the lubricating oil can be greatly influenced. Therefore, how to design a box with good heat dissipation effect is an important technical problem that needs to be solved by the current single-cylinder diesel engine.

Disclosure of Invention

Aiming at the defects of the prior art, the utility model provides a box body of a single-cylinder diesel engine, which aims to solve the problem that the service life of lubricating oil is influenced due to poor heat dissipation effect of the box body of the existing single-cylinder diesel engine.

In order to achieve the above purpose, the present utility model provides the following technical solutions:

a tank for a single cylinder diesel engine, comprising:

the backboard is provided with a motor mounting hole and a crankshaft supporting hole;

the cavity shell is integrally formed with the back plate and is positioned at the periphery of the crankshaft supporting hole;

the cylinder head is arranged above the cavity shell and provided with a piston hole communicated with the interior of the cavity shell; and

The bottom plate is arranged below the cavity shell;

the cavity shell is sequentially provided with an outer shell, a water containing cavity and an inner shell from outside to inside, and the bottom end of the inner shell is hermetically connected with the bottom plate to divide the water containing cavity into a left half cavity and a right half cavity; the bottom of the left half cavity is connected with a water inlet pipe, and the bottom of the right half cavity is connected with a water outlet pipe; the cylinder head is internally provided with a spiral channel surrounding the piston hole, and an inlet and an outlet of the spiral channel are respectively communicated with the top of the left half cavity and the top of the right half cavity.

Optionally, a partition is arranged at the bottom end of the inner shell;

the two sides of the partition are in a semicircular structure, and the bottom surface of the partition is in sealing connection with the bottom plate.

Optionally, the water outlet pipe is connected with a water pump after being bent upwards;

the water pump is fixedly arranged on a supporting table arranged on the backboard;

the water outlet of the water pump is externally connected with a water storage tank;

the bottom of the water storage tank is communicated with the water inlet pipe.

Optionally, a plurality of first heat dissipation ribs are arranged on the outer side wall of the shell at intervals;

and a plurality of second radiating ribs corresponding to the first radiating ribs are arranged on the inner side wall of the inner shell at intervals.

Optionally, a plurality of layers of disc-shaped cooling fins are arranged on the upper portion and the lower portion of the outer circumferential wall of the cylinder head.

Optionally, the output shaft of the water pump is connected with fan blades in an outward extending way;

the air outlet direction of the fan blade is directly opposite to the radiating fin.

Optionally, the outlet of the spiral channel is connected with a cooling pipe;

the cooling pipe is bent downwards and penetrates through the cooling fin to be communicated with the top of the right half cavity;

the cooling pipe is positioned outside the cylinder head and is opposite to the air outlet direction of the fan blade.

Optionally, the cross section of the fin has an elliptical structure, and the distance from the windward side to the center of the piston hole is greater than the distance from the leeward side to the center of the piston hole.

Optionally, the fin tapers in thickness outwardly from the center of the piston bore.

Optionally, the fan blade outer cover is provided with a protective cover;

the protective cover is fixedly connected with the supporting table.

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

1. through the water containing cavity and the spiral channel which are mutually communicated, cooling water can circulate, the temperature rise of the cavity shell and the cylinder head in the working process of the diesel engine can be taken away, the water cooling heat dissipation of the box body is realized, the heat dissipation effect is improved, and the service life of lubricating oil in the box body is prolonged.

2. Can increase the inside area of contact of inner shell and box through the second heat dissipation muscle, improve heat and hold the heat exchange efficiency of water cooling in the water cavity, can increase the area of contact of shell and outside air through first heat dissipation muscle simultaneously to carry out forced air cooling to the chamber shell, the cooperation holds the water cavity and realizes the dual cooling to the chamber shell jointly, and the cooling radiating effect is better.

3. The contact area of the cylinder head and the outside air can be increased through the radiating fins, so that the cylinder head is cooled by air, the double cooling of the cylinder head is realized together by matching with the spiral channel, and the cooling and radiating effects are better.

4. The fan blades can synchronously rotate along with the water pump so as to accelerate air around the cylinder head to flow and blow to the radiating fins, thereby improving the air cooling speed of the cylinder head and further improving the cooling effect of the cylinder head.

5. The cooling water enters the cooling pipe after heat exchange of the left half cavity and the spiral channel and is subjected to forced cooling after heat exchange with wind blown by rotation of the fan blades, so that the cooling water enters the right half cavity after cooling and is subjected to heat exchange with the cavity shell, namely, the cooling water sequentially undergoes the heat, cold and hot processes, and the cooling and heat dissipation effects on the cavity shell are improved.

6. The wind blown by the fan blade rotates and is dispersed through the flow guide of the cooling fin, and the wind can flow around one surface (namely the back surface) of the cylinder head far away from the fan blade and then gather to form strong backflow, so that the disturbance of the air is stronger, the heat exchange strength of the air and the cooling fin is greatly enhanced, and the cooling capacity of the fan blade on the cylinder head is improved.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following description will briefly explain the drawings used in the embodiments or the description of the prior art, and it is obvious that the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of a front view of the present utility model;

FIG. 2 is an enlarged schematic view of a portion A in FIG. 1;

fig. 3 is a schematic view of a partial structure of the B-direction in fig. 2.

Detailed Description

Hereinafter, only certain exemplary embodiments are briefly described. As will be recognized by those of skill in the pertinent art, the described embodiments may be modified in various different ways without departing from the spirit or scope of the present utility model. Accordingly, the drawings and description are to be regarded as illustrative in nature and not as restrictive.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present utility model, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; 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 can be understood by those of ordinary skill in the art according to the specific circumstances.

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.

The following disclosure provides many different embodiments, or examples, for implementing different features of the utility model. In order to simplify the present disclosure, components and arrangements of specific examples are described below. They are, of course, merely examples and are not intended to limit the utility model.

Embodiments of the present utility model will be described in detail below with reference to the accompanying drawings.

Referring to fig. 1 to 3, the present utility model provides a case of a single cylinder diesel engine, comprising:

a back plate 100 on which a motor mounting hole 110 and a crank supporting hole 120 are formed;

the cavity case 200 is integrally formed with the back plate 100 and is positioned at the periphery of the crank supporting hole 120;

the cylinder head 300 is arranged above the cavity shell 200 and provided with a piston hole 310 communicated with the inside of the cavity shell 200; and

A bottom plate 400 provided under the chamber housing 200;

wherein, the cavity shell 200 is sequentially provided with an outer shell 210, a water containing cavity 220 and an inner shell 230 from outside to inside, and the bottom end of the inner shell 230 is hermetically connected with the bottom plate 400 to divide the water containing cavity 220 into a left half cavity and a right half cavity; the bottom of the left half cavity is connected with a water inlet pipe 240, and the bottom of the right half cavity is connected with a water outlet pipe 250; the cylinder head 300 is internally provided with a spiral channel 320 surrounding the piston hole 310, and the inlet and outlet of the spiral channel 320 are respectively communicated with the top of the left half cavity and the top of the right half cavity.

When the cooling device is used, after the box body is fixed through the bottom plate 400, external cooling water is connected from the water inlet pipe 240, and then flows through the left half cavity, the spiral channel 320, the right half cavity and heat generated by rotation of a crankshaft in the cavity shell 200 and heat generated by action of a piston in the piston hole 310 of the cylinder head 300 in sequence to exchange heat, and then flows out from the water outlet pipe 250, so that cooling and heat dissipation of the box body are realized. That is, through the water containing cavity 220 and the spiral channel 320 which are mutually communicated, cooling water can circulate, so that the temperature rise of the cavity shell 200 and the cylinder head 300 in the working process of the diesel engine can be taken away, the water cooling heat dissipation of the box body is realized, the heat dissipation effect is improved, and the service life of lubricating oil in the box body is prolonged.

The bottom of the inner shell 230 is provided with a partition 231, two sides of the partition 231 are in a semicircular structure, and the bottom surface of the partition is in sealing connection with the bottom plate 400. That is, the water containing chamber 220 is divided into a left half chamber and a right half chamber by the partition 231, and the semicircular cambered surfaces at both sides of the partition 231 are advantageous for the flow of the cooling water.

In order to improve the flow speed of the cooling water and the heat dissipation effect of the tank body, the water outlet pipe 250 is connected with a water pump 500 after being bent upwards, the water pump 500 is fixedly installed on a supporting table 130 arranged on the back plate 100, a water outlet of the water pump 500 is externally connected with a water storage tank (not shown in the figure), and the bottom of the water storage tank is communicated with the water inlet pipe 240. Therefore, a circulating water channel can be formed to continuously cool and dissipate heat for the box body.

The outer side wall of the outer shell 210 is provided with a plurality of first heat dissipating ribs 211 at intervals, and the inner side wall of the inner shell 230 is provided with a plurality of second heat dissipating ribs 231 corresponding to the first heat dissipating ribs 211 at intervals. That is, the contact area between the inner shell 230 and the inside of the box body can be increased through the second heat dissipation ribs 231, the heat exchange efficiency of heat and cooling water in the water containing cavity 220 is improved, meanwhile, the contact area between the outer shell 210 and outside air can be increased through the first heat dissipation ribs 211, so that the air cooling is performed on the cavity shell 200, the dual cooling of the cavity shell 200 is realized together by matching with the water containing cavity 220, and the cooling and heat dissipation effects are better.

A plurality of layers of disk-shaped cooling fins 330 are provided on the upper and lower sides of the outer circumferential wall of the cylinder head 300. That is, the contact area between the cylinder head 300 and the external air can be increased through the cooling fins 330, so that the cylinder head 300 is cooled by air, and the dual cooling of the cylinder head 300 is realized together with the spiral channel 320, so that the cooling and heat dissipation effects are better.

Referring to fig. 2, an output shaft of the water pump 500 is connected with a fan blade 600 in an outward extending manner, and an air outlet direction of the fan blade 600 is aligned with the cooling fin 330. That is, the fan blades 600 can rotate synchronously with the water pump 500 to accelerate the air around the cylinder head 300 and blow the air to the cooling fins 330, thereby improving the cooling speed of the cylinder head 300 and further improving the cooling effect of the cylinder head 300.

The outlet of the spiral channel 320 is connected with a cooling pipe 340, the cooling pipe 340 is bent downwards and penetrates through the cooling fin 330 to be communicated with the top of the right half cavity, and the cooling pipe 340 is positioned outside the cylinder head 300 and is opposite to the air outlet direction of the fan blade 600. In this way, after the cooling water is subjected to heat exchange through the left half cavity and the spiral channel 320, the cooling water enters the cooling pipe 340 and the wind blown out by rotation of the fan blades 600 again to be subjected to heat exchange so as to be strongly cooled, and after cooling, the cooling water enters the right half cavity to continue to be subjected to heat exchange with the cavity shell 200, namely, the cooling water sequentially undergoes the processes of heat, cold and heat, so that the cooling and heat dissipation effects on the cavity shell 200 are improved.

To better guide the wind flow generated by the rotation of the fan blade 600, the cross section of the heat sink 330 has an elliptical structure as shown in fig. 3, and the distance from the center of the piston hole 310 on the windward side is greater than the distance from the center of the piston hole 310 on the leeward side (i.e., eccentrically disposed). That is, the wind blown by the rotation of the fan blade 600 is guided and dispersed by the cooling fins 330, and can flow around the surface (i.e. the back surface) of the cylinder head 300 far away from the fan blade 600 to be gathered again to form strong backflow, so that the disturbance of the air is stronger, the heat exchange strength of the air and the cooling fins 330 is greatly enhanced, and the cooling capability of the fan blade 600 to the air cooling of the cylinder head 300 is improved. In this embodiment, the thickness of the fin 330 gradually decreases from the center of the piston bore 310.

In order to avoid a safety accident when the fan blade 600 rotates, the fan blade 600 is provided with a protective cover 610 (only a part of which is shown in the figure), and the protective cover 610 is fixedly connected with the supporting table 130.

The above embodiments are only preferred embodiments of the present utility model, and are not limiting to the technical solutions of the present utility model, and any technical solution that can be implemented on the basis of the above embodiments without inventive effort should be considered as falling within the scope of protection of the patent claims of the present utility model.

Claims

1. A tank for a single cylinder diesel engine, comprising:

The bottom plate is arranged below the cavity shell;

2. The case of a single cylinder diesel engine according to claim 1, wherein:

a partition is arranged at the bottom end of the inner shell;

3. The case of a single cylinder diesel engine according to claim 1, wherein:

the water outlet pipe is connected with a water pump after being bent upwards;

the bottom of the water storage tank is communicated with the water inlet pipe.

4. A tank for a single cylinder diesel engine according to any one of claims 1 to 3, characterized in that:

a plurality of first radiating ribs are arranged on the outer side wall of the shell at intervals;

5. A tank of a single cylinder diesel engine according to claim 3, wherein the outer circumferential wall of the cylinder head is provided with a plurality of layers of disc-shaped cooling fins up and down.

6. The case of a single cylinder diesel engine according to claim 5, wherein:

the output shaft of the water pump is connected with fan blades in an outward extending way;

7. The case of a single cylinder diesel engine according to claim 6, wherein:

the outlet of the spiral channel is connected with a cooling pipe;

8. The case of a single cylinder diesel engine as set forth in claim 6 or 7 wherein the cross section of the fin has an oval shape and the windward side thereof is spaced from the center of the piston hole more than the leeward side thereof.

9. The case of a single cylinder diesel engine as set forth in claim 8, wherein the fin has a thickness that tapers outwardly from the center of the piston bore.

10. The case of a single cylinder diesel engine according to claim 6 or 7, characterized in that:

the fan blade outer cover is provided with a protective cover;

the protective cover is fixedly connected with the supporting table.