CN219220572U

CN219220572U - Integrated cooling structure for electric compressor

Info

Publication number: CN219220572U
Application number: CN202222660442.1U
Authority: CN
Inventors: 沃鸣杰; 许骐骏; 张艳丽
Original assignee: NINGBO WEIFU TIANLI TURBOCHARGING TECHNOLOGY CO LTD
Current assignee: NINGBO WEIFU TIANLI TURBOCHARGING TECHNOLOGY CO LTD
Priority date: 2022-10-10
Filing date: 2022-10-10
Publication date: 2023-06-20
Anticipated expiration: 2032-10-10

Abstract

The integrated cooling structure is arranged in a compressor shell of the electric compressor and used for cooling an electric control assembly and a motor assembly in the electric compressor; the cooling structure comprises an electric control assembly cooling cavity and a motor assembly cooling cavity, and after the cooling liquid enters the compressor shell: and the water flows out after passing through the electric control component cooling cavity and the motor component cooling cavity in sequence, or flows out after passing through the motor component cooling cavity and the electric control component cooling cavity in sequence. The electric compressor in the application adopts a set of cooling structure to cool the electric control component and the motor component, so that the whole can adopt a casting process, the cost is obviously reduced, and the structure is compact.

Description

Integrated cooling structure for electric compressor

Technical Field

The utility model belongs to the technical field of turbocharging, and particularly relates to an integrated cooling structure for an electric compressor.

Background

The turbocharging technology is widely applied to automobiles, wherein the traditional turbocharger utilizes energy such as heat energy, kinetic energy, pressure energy and the like in exhaust gas discharged by an engine during operation to push a turbine in a turbine box, the turbine drives a coaxial impeller to form a rotor assembly, and the impeller compresses air sent by an air filter pipeline to enable the air to enter a combustion chamber of the engine after being pressurized.

At present, an electric pressurizing technology is also started to appear, and is represented as an electric compressor, and a motor is used for driving an impeller of the compressor to rotate, so that gas is pressed in, and a pressurizing effect is achieved. The electric compressor generally comprises a shell, an electric control assembly, a motor assembly, an impeller assembly and the like, wherein the electric control assembly and the motor assembly all generate heat in the working process, and the heat generation amount is increased during high-load working, so that the electric compressor can be guaranteed to operate efficiently and permanently only by matching with a professional cooling assembly, and the electric control assembly cooling structure and the motor assembly cooling structure are adopted at present, so that the electric compressor is complex in structure and high in cost.

Therefore, based on some of the current situations, the present application further designs and improves the water cooling structure in the electric compressor.

Disclosure of Invention

Aiming at the defects in the prior art, the utility model provides an integrated cooling structure for an electric compressor, and the cooling structure is optimally designed, so that a set of cooling structural general formula is adopted for cooling an electric control assembly and a motor assembly, the cooling is improved, and the cooling effect is good.

The utility model is solved by the following technical scheme.

The integrated cooling structure is arranged in a compressor shell of the electric compressor and used for cooling an electric control assembly and a motor assembly in the electric compressor; the cooling structure comprises an electric control assembly cooling cavity and a motor assembly cooling cavity, and after cooling liquid enters the compressor shell: and the water flows out after passing through the electric control component cooling cavity and the motor component cooling cavity in sequence, or flows out after passing through the motor component cooling cavity and the electric control component cooling cavity in sequence.

The electric compressor in the application adopts a set of cooling structure to cool the electric control component and the motor component, so that the whole can adopt a casting process, the cost is obviously reduced, and the structure is compact.

In a preferred embodiment, one side of automatically controlled subassembly cooling chamber is equipped with the closing plate that is used for sealedly, one side of closing plate orientation automatically controlled subassembly cavity is equipped with the automatically controlled unit, and specifically, the automatically controlled unit can be located on the automatically controlled board, and this automatically controlled board closely pastes the closing plate for the heat that the automatically controlled board produced can be quick transfer to the closing plate, and the inboard of closing plate is the inner wall in automatically controlled subassembly cooling chamber, with the coolant liquid contact, can reach fine cooling effect, guarantees the steady operation of automatically controlled subassembly.

In a preferred embodiment, a plurality of heat conducting strips extend out of one side, facing the cooling cavity of the electric control assembly, of the sealing plate, so that the heat dissipation effect can be remarkably improved.

In a preferred embodiment, the cooling cavity of the electric control assembly is of a bent strip-shaped structure, and two ends of the cooling cavity are respectively provided with a cooling liquid inlet and a cooling liquid outlet.

In a preferred embodiment, the cooling cavities of the motor assembly are distributed in the interlayer of the side wall of the compressor housing, and the compressor housing can be produced in a way of integral casting, and has low cost and good sealing performance.

In a preferred embodiment, a partition is arranged in the interlayer space of the side wall of the compressor housing, the partition is used for enabling the cooling cavity of the motor assembly to form a bent channel, a circulation path of cooling liquid is increased, and the cooling effect on the motor assembly is improved.

In a preferred embodiment, the cooling liquid passes through the electric control assembly cooling cavity first and then passes through the motor assembly cooling cavity and then flows out; the position that the coolant liquid enters into motor assembly cooling chamber from the export of automatically controlled subassembly cooling chamber is in the kink department of passageway to make the coolant liquid divide into two-way and flow in the intermediate layer space, finally assemble the back and flow, this structure can the efficient cooling, avoids the terminal coolant liquid of runner to overheat, guarantees that the cooling effect is good.

Compared with the prior art, the utility model has the following beneficial effects: the integrated cooling structure for the electric compressor is provided, the cooling structure is optimally designed, and the electric control assembly and the motor assembly are cooled by adopting a set of cooling structural general formula, so that the cooling is improved, and the cooling effect is good.

Drawings

Fig. 1 is a perspective view of an electric compressor according to the present utility model.

Fig. 2 is a second perspective view of the electric compressor according to the present utility model.

Fig. 3 is a schematic diagram of an electric compressor according to the present utility model.

Fig. 4 is a schematic flow diagram of the airflow duct in fig. 3.

Fig. 5 is a schematic diagram of a second embodiment of the electric compressor according to the present utility model.

Fig. 6 is a sectional view in the direction B-B of fig. 5.

Fig. 7 is an enlarged view of area a in fig. 6.

Fig. 8 is a schematic view of the impeller structure.

Fig. 9 is a perspective view of a compressor housing in the electric compressor of the present utility model.

Fig. 10 is a second perspective view of a compressor housing in the electric compressor of the present utility model.

Fig. 11 is a perspective view of the electric compressor with the compressor housing omitted.

Fig. 12 is a perspective view of a flow channel cavity in the cooling structure of the present utility model.

Fig. 13 is a second perspective view of a flow channel cavity in the cooling structure of the present utility model.

Detailed Description

The utility model is described in further detail below with reference to the drawings and the detailed description.

In the following embodiments, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout, and the embodiments described below by referring to the drawings are exemplary only for explaining the present utility model and are not to be construed as limiting the present utility model.

In the description of the present utility model, it is to be understood that the terms: the directions of the center, the longitudinal, the lateral, the length, the width, the thickness, the upper, the lower, the front, the rear, the left, the right, the vertical, the horizontal, the top, the bottom, the inner, the outer, the clockwise, the counterclockwise, etc. indicate the directions or the positional relationship based on the directions or the positional relationship shown in the drawings, are merely for convenience of description and simplification of the description, and therefore, should not be construed as limiting the present utility model. Furthermore, the term: first, second, etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of features shown. In the description of the present utility model, unless explicitly specified and defined otherwise, the terms: mounting, connecting, etc. should be construed broadly and the specific meaning of the terms in the present application will be understood by those skilled in the art in view of the specific circumstances.

Referring to fig. 1 to 13, an electric compressor and a cooling structure thereof in the present utility model.

In the application, the electric compressor comprises a compressor shell 2, wherein a compressor cover plate 1 is arranged on one side of the compressor shell 2, and an air flow pipeline 8 is arranged on the other side of the compressor shell 2; the compressor housing 2 is internally provided with a motor assembly 3, an electric control assembly chamber 20 is formed between the compressor cover plate 1 and the compressor housing 2, and an electric control assembly is arranged in the electric control assembly chamber; a rear cover plate 34 is arranged on one side, far away from the compressor cover plate 1, of the compressor shell 2, a motor assembly chamber is formed between the rear cover plate 34 and the inner cavity of the compressor shell 2, a motor assembly 3 is arranged in the motor assembly chamber, a rotating shaft 31 of the motor assembly 3 penetrates through the rear cover plate 34 and is then connected to an impeller 4, and the impeller 4 is used for pressing gas into a gas flow pipeline 8; the electric control component chamber 20 and the motor component chamber are isolated and are successively cooled by a cooling structure; the cooling structure is arranged in the compressor housing 2, and comprises an electric control component cooling cavity 63 arranged on the inner side of the electric control component chamber 20 and a motor component cooling cavity 65 arranged on the periphery of the motor component chamber, and after the cooling liquid enters the compressor housing 2: and flows out after passing through the electric control component cooling cavity 63 and the motor component cooling cavity 65 in sequence, or flows out after passing through the motor component cooling cavity 65 and the electric control component cooling cavity 63 in sequence.

Specifically, in this application, one side of automatically controlled subassembly cooling chamber 63 is equipped with the closing plate 11 that is used for sealedly, one side of closing plate 11 towards automatically controlled subassembly cavity 20 is equipped with the automatically controlled unit, and specifically, the automatically controlled unit can be located on the automatically controlled board, and this automatically controlled board closely pastes closing plate 11 for the heat that the automatically controlled board produced can be quick transfer to closing plate 11, and the inboard of closing plate 11 is the inner wall of automatically controlled subassembly cooling chamber 63, with the coolant liquid contact, can reach fine cooling effect, guarantees the steady operation of automatically controlled subassembly. Further, the sealing plate 11 extends out of a side facing the cooling cavity 63 of the electronic control assembly to form a plurality of heat conducting strips 111, which can significantly improve the heat dissipation effect.

In this application, the electric control assembly cooling chamber 63 is a curved strip-shaped structure, and both ends thereof are respectively provided with a cooling liquid inlet and a cooling liquid outlet.

As can be seen from the drawings, in the present application, the motor assembly cooling cavities 65 are distributed in the interlayer of the side wall of the compressor housing 2, and the compressor housing 2 can be produced by integral casting, so that the cost is low and the tightness is good. In a further embodiment, a partition 659 is disposed in the interlayer space of the side wall of the compressor housing 2, and the partition 659 is used to form a bent channel in the cooling cavity 65 of the motor assembly, so as to increase the circulation path of the cooling liquid and improve the cooling effect on the motor assembly 3. In this application, the axially disposed partition 659 functions as two: 1. the cooling liquid channel is divided, a labyrinth water channel is integrally formed, and the cooling effect is enhanced; 2. the axial partitions 659 facilitate casting, so that the motor casing can be cast with reduced cost.

In addition, in one embodiment of the present application, the cooling fluid flows through the electric control assembly cooling chamber 63 and then flows out after flowing through the motor assembly cooling chamber 65; the position that the coolant liquid enters into motor assembly cooling chamber 65 from the export of automatically controlled subassembly cooling chamber 63 is in the kink department of passageway to make the coolant liquid divide into two-way and flow in the intermediate layer space, finally assemble the back and flow, this structure can the efficient cooling, avoids the terminal coolant liquid of runner to overheat, guarantees that the cooling effect is good.

It can be seen from the drawings that, in the electric compressor of the application, the included angle a between the gas inlet direction of the gas flow pipeline 8 and the horizontal direction is 20-25 degrees, and the structure can enable the structure of the spiral gas flow pipeline 8 to be more compact, and the spiral effect is more compact than the traditional one, so that the whole volume is reduced.

In the electric compressor of the present application, the inner side of the impeller 4 has a recess having a depth h of 1/12 to 1/8, preferably 1/10, of the outer diameter h0 of the impeller, which can reduce the axial length and contribute to the reduction of the overall volume. The rear cover plate 34 is provided with a protruding structure at the position of the concave part, and the position of the rotating shaft 31 penetrating through the protruding structure is provided with a bearing 33 and a shaft seal sleeve 32, so that the functions of rotation and sealing are achieved. The improvement of the structure reduces the axial length of the whole motor rotor to the maximum extent under the condition of ensuring the strength of the impeller, so that the structure is compact, and the stability of the rotor is improved.

An embodiment of the present utility model will be described in detail with reference to the accompanying drawings, and in particular, to fig. 12 and 13. As can be seen from the drawing, in this embodiment, the cooling liquid is water, the outer wall of the compressor housing 2 is provided with the water inlet pipe 22 and the water outlet pipe 27, the water inlet pipe 22 is close to one side of the electric control assembly, after water inlet, the cooling water enters the electric control assembly cooling cavity 63 through the flow channel to cool the electric control assembly, then flows into the motor assembly cooling cavity 65 from the through hole on the other side of the electric control assembly cooling cavity 63, at this time, the cooling liquid is divided into two paths, one path passes through the first channel 65a, the other path passes through the second channel 65b after passing through the bending part 67, the two paths of cooling liquid flows bidirectionally to cool, finally, the cooling liquid converges at the outlet 66, and flows out through the water outlet pipe 27, and the structure formed by the flow of the cooling liquid is shown in fig. 12 and 13, and is not a solid structure.

The utility model provides an electric compressor has adopted a set of cooling structure to carry out automatically controlled subassembly and motor assembly's cooling down cooling to, the compressor casing 2 in this application has integrated motor assembly cavity, automatically controlled subassembly cooling chamber, wholly adopts casting technology, has with low costs, compact structure's characteristics. The motor stator, the rotating shaft, the rotor bearing and other systems (which can be of a conventional structure in the prior art) are fixed in the motor assembly chamber, and the electric control assembly is arranged in the electric control assembly chamber. The heating element of the electric control assembly is contacted with the sealing plate 11 through heat-conducting silica gel, so that the cooling effect of the electric control assembly is enhanced. The water inlet and outlet pipe is arranged on the compressor shell 2 through a press mounting process, so that a press shell flow channel is optimized, and the axial size of the press shell flow channel is reduced.

In the above, the utility model provides an integrated cooling structure for an electric compressor, and the cooling structure is optimally designed, so that the electric control assembly and the motor assembly are cooled by adopting a set of cooling structural general formula, the cooling is improved, and the cooling effect is good.

The scope of the present utility model includes, but is not limited to, the above embodiments, and any alterations, modifications, and improvements made by those skilled in the art are intended to fall within the scope of the utility model.

Claims

1. A integral type cooling structure for among electric compressor, its characterized in that: the cooling structure is arranged in a compressor shell (2) in the electric compressor and is used for cooling an electric control assembly and a motor assembly (3) in the electric compressor;

the cooling structure comprises an electric control assembly cooling cavity (63) and a motor assembly cooling cavity (65), and after cooling liquid enters the compressor shell (2): flows out after passing through the electric control component cooling cavity (63) and the motor component cooling cavity (65) in sequence, or flows out after passing through the motor component cooling cavity (65) and the electric control component cooling cavity (63) in sequence.

2. The integrated cooling structure for an electric compressor according to claim 1, wherein a sealing plate (11) for sealing is provided at one side of the electric control assembly cooling chamber (63), and a plurality of heat conducting strips (111) extend from the sealing plate (11) toward the electric control assembly cooling chamber (63).

3. The integrated cooling structure for an electric compressor according to claim 2, wherein the electric control assembly cooling chamber (63) is a curved strip-shaped structure, and both ends thereof are provided with a cooling liquid inlet and a cooling liquid outlet, respectively.

4. The integrated cooling structure for use in an electric compressor according to claim 1, characterized in that the motor assembly cooling cavities (65) are distributed in an interlayer of the side wall of the compressor housing (2).

5. The integrated cooling structure for use in an electric compressor according to claim 4, characterized in that a partition (659) is provided in the sandwich space of the side wall of the compressor housing (2), said partition (659) being used to form a bent channel for the motor assembly cooling cavity (65).

6. The integrated cooling structure for use in an electric compressor as claimed in claim 5, wherein the cooling fluid flows out through the electric control assembly cooling chamber (63) and then through the motor assembly cooling chamber (65); the cooling liquid enters the motor assembly cooling cavity (65) from the outlet of the electric control assembly cooling cavity (63) and is positioned at the bending position of the channel, and the cooling liquid flows in the interlayer space in two ways, and finally flows out after being converged.