CN220319667U - Heat dissipation mechanism of generator - Google Patents

Abstract

The utility model relates to a heat dissipation mechanism of a generator, which is accommodated in a wind scooper of an engine and comprises the generator and a cooling fan. The generator comprises a stator and a flywheel, wherein the stator is fixedly arranged on the engine box body, the flywheel is sleeved at the tail end of the crankshaft, the flywheel and the crankshaft synchronously rotate, and an opening is formed in the flywheel. The cooling fan comprises a structural separation plate, an inner side fan blade and an outer side fan blade, wherein the structural separation plate is fixedly arranged on the flywheel, and the inner side fan blade and the outer side fan blade are respectively arranged on the inner side and the outer side of the structural separation plate. Therefore, the inner fan blades and the outer fan blades are arranged on the inner side and the outer side of the structural partition plate of the cooling fan of the generator, and the flywheel of the generator is provided with the opening, so that the heat dissipation mode of the generator is changed from natural convection into forced convection, the heat dissipation capacity of the generator is effectively improved, and the power generation can be further improved.

Description

Heat dissipation mechanism of generator

Technical Field

The present utility model relates to a heat dissipation mechanism for a generator, and more particularly to a heat dissipation mechanism for a generator suitable for a fuel vehicle.

Background

Fig. 1 is a plan view of a conventional engine generator and cooling fan. A cooling system for a conventional air-cooled internal combustion engine is shown, in which heat is generated when the conventional internal combustion engine 910 is operated, and a proper air flow is required to cool the cylinder 903 and the cylinder head 902. Therefore, the engine 910 must be equipped with a cooling fan 93 to draw cool air from outside the engine 910, and guide the air flow to the cylinder 903 and the cylinder head 902 via a fan housing 911, the air flows through the fins of the cylinder 903 and the cylinder head 902 to remove heat, and finally the hot air is discharged from the fan housing opening below the engine 910.

The conventional engine 910 has a crankshaft 913 penetrating through an engine housing 912, and is covered with a fan housing 911, the fan housing 911 includes a fan housing 9113, a right fan housing 9112 and a left fan housing 9111, and the cooling system of the conventional air-cooled internal combustion engine includes a generator 92 and a cooling fan 93. The generator comprises a stator 921 and a flywheel 922, wherein the stator 921 is locked on the engine box 912 by a screw, the flywheel 922 is sleeved at the tail end of the crankshaft 913, and the flywheel 922 and the crankshaft 913 are synchronously rotated by a nut and generate relative rotation with the stator 921. The cooling fan 93 is mounted on the outer side of the flywheel 922 and rotates in synchronization with the crankshaft 913.

The power generation process can generate heat, the existing power generator dissipates heat in a natural convection mode, and the framework is reasonably and simply designed under the condition that the power generation and the heat dissipation capacity are not high. However, as the power consumption of the electronic devices of the vehicle increases, the power generation power must be increased, and the waste heat is also increased, so that the problem that the efficiency is reduced or even damaged due to overheat of the generator is easily generated. Therefore, the natural convection cooling generator has a limitation in the generated power.

The inventor has paid attention to the fact that the present utility model is based on the spirit of the active utility model, and has been completed through several research experiments.

Disclosure of Invention

The utility model mainly aims at providing a heat dissipation mechanism of a generator, which is characterized in that the inner side fan blades and the outer side fan blades are arranged on the inner side and the outer side of a structural partition board of a cooling fan of the generator, and openings are formed in a flywheel of the generator, so that the heat dissipation mode of the generator is changed from natural convection into forced convection, the heat dissipation capacity of the generator is effectively improved, and the power generation power is further improved.

In order to achieve the above purpose, the heat dissipation mechanism of the generator of the present utility model is accommodated in a wind scooper of an engine, the engine has a crankshaft penetrating through an engine case, and the heat dissipation mechanism comprises a generator and a cooling fan. The generator comprises a stator and a flywheel, wherein the stator is fixedly arranged on the engine box body, the flywheel is sleeved at the tail end of the crankshaft, the flywheel and the crankshaft synchronously rotate, and an opening is formed in the flywheel. The cooling fan comprises a structural separation plate, an inner side fan blade and an outer side fan blade, wherein the structural separation plate is fixedly arranged on the flywheel, and the inner side fan blade and the outer side fan blade are respectively arranged on the inner side and the outer side of the structural separation plate.

Through the design, the structural separation plate can separate the inner fan blade from the outer fan blade so that the flow fields at two sides are not mutually influenced. The function of the outer fan blade is the same as that of the existing fan blade, and the outer fan blade sucks cold air outside the engine in a rotating way and pushes the cold air to a cylinder and a cylinder head of the engine to cool; the inner fan blades pump out the hot air in the generator through the opening of the flywheel, and discharge the hot air along the centrifugal direction, so as to generate forced cooling airflow in the generator.

The structural partition plate, the inner fan blade and the outer fan blade can be made of the same material; the structural partition plate, the inner fan blade and the outer fan blade can be of an integrated structure.

The height of the outer fan blades may be greater than the height of the inner fan blades so that the cooling fan may perform the primary function of cooling the cylinder and cylinder head of the engine while simultaneously performing the secondary function of cooling the generator.

The structural partition plate may have a disk-like structure with a concave portion facing inward. Thereby helping to guide cool air outside the engine to the cylinder and cylinder head of the engine for cooling.

The structural partition plate can be fixedly locked on the flywheel through screws.

The center axis of the cooling fan, the center axis of the flywheel, and the center axis of the crankshaft may be three-line overlapped.

The outer diameter of the cooling fan is larger than or equal to that of the flywheel. Therefore, the rotation range of the inner fan blade covers the whole flywheel structure, so that the forced convection of the generator is more remarkable, and a better heat dissipation effect is achieved.

The foregoing summary and the following detailed description are exemplary in nature and are intended to further illustrate the utility model as claimed. Other objects and advantages of the present utility model will be apparent from the following detailed description and the accompanying drawings.

Drawings

Fig. 1 is a plan view of a conventional engine generator and cooling fan.

Fig. 2 is a top view of a heat dissipation mechanism of a generator according to a preferred embodiment of the utility model.

Fig. 3 is a partial enlarged view of fig. 2.

Fig. 4 is an exploded perspective view of a heat dissipation mechanism of a generator according to a preferred embodiment of the present utility model.

Description of main reference numerals:

1. heat dissipation mechanism of generator

10. Engine

11. Wind scooper

12. Engine box

13. Crankshaft

2. Electric generator

21. Stator

22. Flywheel

221. An opening

3. Cooling fan

31. Structural separator

32. Inner fan blade

33. Outside fan blade

4. Screw

902. Cylinder head

903. Cylinder with a cylinder head

910. Engine

911. Wind scooper

9111. Left wind scooper

9112. Right wind scooper

9113. Fan cover

912. Engine box

913. Crankshaft

92. Electric generator

921. Stator

922. Flywheel

93. Cooling fan

D, D outside diameter

H, H height

S forced cooling air flow

Detailed Description

Fig. 2 to 4 are a top view of a heat dissipation mechanism of a generator according to a preferred embodiment of the present utility model, a partially enlarged view of fig. 2, and an exploded perspective view of the heat dissipation mechanism of the generator, respectively. The power generator cooling mechanism 1 is shown to be accommodated in a wind scooper 11 of an engine 10, and the engine 10 is provided with a crankshaft 13 penetrating through an engine box 12, and comprises a power generator 2 and a cooling fan 3.

The generator 2 comprises a stator 21 and a flywheel 22, the stator 21 is locked on the engine box 12 by screws, the flywheel 22 is sleeved at the tail end of the crankshaft 13 and is tightly pressed on the crankshaft 13 by nuts, so that the flywheel 22 and the crankshaft 13 synchronously rotate and generate relative rotation with the stator 21 to generate electricity. In this embodiment, the flywheel 22 is provided with a plurality of openings 221 for being used as an exhaust outlet of the hot air inside the generator 2, so as to generate the forced cooling air flow S and enhance the heat dissipation capacity of the generator 2.

The cooling fan 3 includes a structural partition 31, a plurality of inner fan blades 32 and a plurality of outer fan blades 33, and in this embodiment, the structural partition 31, the inner fan blades 32 and the outer fan blades 33 are made of the same material and are integrally formed. The structural baffle 31 is fastened to the flywheel 22 by screws 4 and has a disk-like structure with a concave portion facing inward, which helps to guide cool air outside the engine 10 to the cylinders and cylinder heads of the engine 10 for cooling. Further, since the inner fan blade 32 and the outer fan blade 33 are provided on the inner and outer sides of the structural partition 31, the inner fan blade 32 and the outer fan blade 33 can be separated by the structural partition 31 so that the flow fields on the both sides do not affect each other. In the present embodiment, the height H of the outer fan blades 33 is greater than the height H of the inner fan blades 32, so that the cooling fan 3 can perform the primary function of cooling the cylinder and cylinder head of the engine 10, and simultaneously perform the secondary function of cooling the generator 2. The outer diameter D of the cooling fan 3 is greater than or equal to the outer diameter D of the flywheel, so that the rotation range of the inner fan blades 32 covers the whole structure of the flywheel 22, the forced convection of the generator 2 is more remarkable, and a better heat dissipation effect is achieved. Further, the center axis of the cooling fan 3, the center axis of the flywheel 22, and the center axis of the crankshaft 13 in this embodiment overlap three lines.

The inner side and the outer side in the present utility model refer to the inner side and the outer side of the engine 10, and the direction close to the center of the engine is the inner side, and vice versa. Since the generator 2 of the engine 10 is usually disposed on the right side (in plan view) of the engine 10, in the embodiment of the present utility model, the left side of the component is the inner side, and the right side of the component is the outer side.

Through the design, the function of the outer fan blades 33 is the same as that of the existing fan blades, and the cooling is performed by rotating the cold air sucked into the outside of the engine 10 and pushing the cold air to the cylinder and the cylinder head of the engine 10; the inner fan blades 32 draw out the hot air inside the generator 2 through the openings 221 of the flywheel 22, and discharge the hot air in the centrifugal direction, thereby generating a forced cooling air flow S inside the generator 2.

The foregoing embodiments are merely illustrative, and the scope of the utility model is defined by the claims rather than by the foregoing embodiments.

Claims (8)

1. The utility model provides a generator cooling mechanism, holds in a wind scooper of an engine, this engine has a bent axle of wearing to locate an engine box, its characterized in that includes:

the generator comprises a stator and a flywheel, wherein the stator is fixedly arranged on the engine box body, the flywheel is sleeved at the tail end of the crankshaft, so that the flywheel and the crankshaft synchronously rotate, and an opening is formed in the flywheel; and

the cooling fan comprises a structural partition plate, an inner side fan blade and an outer side fan blade, wherein the structural partition plate is fixedly arranged on the flywheel, and the inner side fan blade and the outer side fan blade are respectively arranged on the inner side and the outer side of the structural partition plate.

2. The generator cooling mechanism of claim 1, wherein the structural spacer, the inner fan blade and the outer fan blade are of the same material.

3. The generator cooling mechanism of claim 2, wherein the structural spacer, the inner fan blade and the outer fan blade are of unitary construction.

4. The generator cooling mechanism of claim 1, wherein the height of the outer fan blade is greater than the height of the inner fan blade.

5. The generator cooling mechanism of claim 1, wherein the structural separator is a disk-like structure with the recess facing inward.

6. The generator cooling mechanism of claim 1, wherein the structural spacer is screwed to the flywheel.

7. The generator cooling mechanism of claim 1, wherein the center axis of the cooling fan, the center axis of the flywheel, and the center axis of the crankshaft are three-wire coincident.

8. The generator cooling mechanism of claim 1, wherein an outer diameter of the cooling fan is greater than or equal to an outer diameter of the flywheel.