Motor cooling structure

Abstract

The utility model provides a motor cooling structure, and belongs to the technical field of machinery. The problem that an existing cooling structure is poor in effect is solved. According to the motor cooling structure, a motor comprises a heat conduction cylinder used for installing a stator core and a machine cylinder arranged on the heat conduction cylinder in a sleeving mode, the cooling structure comprises a spiral groove formed in the outer side face of the heat conduction cylinder, a liquid inlet and a liquid outlet which are communicated with the two ends of the spiral groove respectively are formed in the machine cylinder, and a tubular liquid inlet connector is fixed in the liquid inlet; a conical flow guide body is fixed to the bottom wall of the spiral groove, and the flow guide body and the liquid inlet connector are coaxially arranged. The diameter of the flow guide body is gradually increased from the liquid inlet to the spiral groove, and one end of the flow guide body extends into the liquid inlet connector. The motor cooling structure is good in cooling effect.

Description

TECHNICAL FIELD

[0001] The utility model belongs to mechanical technical field relates to a motor especially a motor cooling structure. BACKGROUND

[0002] The motor water cooling structure is an effective heat dissipation system, mainly used for reducing the heat generated in the operation process of the motor, to ensure its stable and efficient work.

[0003] The existing water cooling structure such as the water cooling structure for permanent magnet synchronous motor (application number: 201320397423.2) disclosed in Chinese patent library includes the spiral groove arranged on the outer contour surface of the shell, the shell is fixed on the outer shell, the shell forms the closed spiral channel for the spiral groove, and the two ends of the spiral channel are the water inlet port and the water outlet port, the water inlet nozzle seat and the water outlet nozzle seat are fixed on the shell and are communicated with the water inlet port and the water outlet port respectively, the spiral groove is a plurality of parallel spiral grooves, and the spiral channel is a plurality of spiral channels, the number of spiral grooves is two, and the spiral channel is a double spiral channel.

[0004] In the above water cooling structure, the cooling water entering from the water inlet nozzle seat directly impacts on the bottom wall of the spiral groove, and turbulence and vortex are easily formed at the inlet of the spiral groove, which affects the inflow efficiency of the cooling water, thereby affecting the cooling effect. UTILITY MODEL CONTENTS

[0005] The utility model aims at the above problems existing in the prior art, and provides a motor cooling structure capable of improving the cooling effect.

[0006] The utility model can be realized by the following technical scheme: a motor cooling structure, the motor includes a heat conduction cylinder for mounting a stator core and a machine cylinder sleeved on the heat conduction cylinder, the cooling structure includes a spiral groove arranged on the outer side surface of the heat conduction cylinder, the machine cylinder is provided with a liquid inlet and a liquid outlet communicated with two ends of the spiral groove respectively, a tubular liquid inlet connector is fixed in the liquid inlet, characterized in that a conical flow guide body is fixed on the bottom wall of the spiral groove, and the flow guide body and the liquid inlet connector are coaxially arranged, the diameter of the flow guide body gradually increases from the liquid inlet to the spiral groove, and one end of the flow guide body extends into the liquid inlet connector.

[0007] The conical flow guide body extends into the liquid inlet connector, can guide the cooling water to enter the spiral groove more smoothly, reduces the turbulence and vortex of the water flow at the inlet of the spiral groove, thereby improves the inflow efficiency of the water flow and the cooling effect of the cooling structure.

[0008] In the motor cooling structure, the liquid inlet joint comprises a straight pipe-shaped main body, and the main body and the flow guide body are coaxially arranged; the main body is composed of a liquid inlet section and a liquid outlet section which are continuously distributed along the axial direction of the main body, and the liquid outlet section is inserted and fixed in the liquid inlet opening at the end away from the liquid inlet section; the inner diameter of the liquid inlet section is smaller than that of the liquid outlet section, and the flow guide body extends to the liquid outlet section. The main body is divided into a liquid outlet section with a larger inner diameter and a liquid inlet section with a smaller inner diameter, and the flow guide body extends into the liquid outlet section, which can effectively avoid the congestion of the liquid outlet joint, further improve the cooling water inlet efficiency, and make the cooling effect of the cooling structure better.

[0009] In the motor cooling structure, the bottom surface of the flow guide body is formed with a positioning column, and the positioning column and the flow guide body are coaxially arranged; the bottom surface of the spiral groove is provided with a positioning groove which is matched with the positioning column in shape and size, and the positioning column is inserted into the positioning groove. The flow guide body is positioned by being inserted into the positioning groove, so that the installation can be completed by simply pressing the flow guide body during assembly, effectively facilitating the assembly.

[0010] In the motor cooling structure, the positioning column is provided with an axially arranged weight-reducing hole which extends to the flow guide body at one end and extends to the end surface of the positioning column away from the flow guide body at the other end. The design of the weight-reducing hole can reduce the weight of the flow guide body and the material investment.

[0011] In the motor cooling structure, the outer surface of the end of the positioning column away from the flow guide body is formed with a tapered guide surface for guiding the insertion of the positioning column, further facilitating the installation of the flow guide body.

[0012] In the motor cooling structure, the outer side wall of the heat conduction cylinder is matched with the inner side wall of the cylinder, and an interference fit is formed therebetween.

[0013] In the motor cooling structure, the inner wall of one end of the cylinder is formed with a ring-shaped positioning seat, and the other end of the heat conduction cylinder is formed with a ring-shaped limiting seat which is pressed against the other end of the cylinder. The positioning seat and the limiting seat cooperate to limit the relative position of the cylinder and the heat conduction cylinder, facilitating assembly.

[0014] Compared with the prior art, the motor cooling structure has the following advantages:

[0015] 1. The conical flow guide body extends into the liquid inlet joint, which can guide the cooling water to flow more smoothly into the spiral groove, reduce the turbulence and vortex of the water flow at the inlet of the spiral groove, thereby improving the water inlet efficiency and the cooling effect of the cooling structure.

[0016] 2. The main body is divided into a liquid outlet section with a larger inner diameter and a liquid inlet section with a smaller inner diameter, and the flow guide body extends into the liquid outlet section, which can effectively avoid the congestion of the liquid outlet joint, further improve the cooling water inlet efficiency, and make the cooling effect of the cooling structure better. Attached Figure Description

[0017] Figure 1 This is a 3D schematic diagram of an electric motor.

[0018] Figure 2 This is a cross-sectional view of the motor.

[0019] Figure 3 yes Figure 2 Enlarged diagram of point A in the middle.

[0020] In the diagram, 1 is the heat-conducting cylinder; 1a is the spiral groove; 1b is the limiting seat; 2 is the barrel; 2a is the liquid inlet; 2b is the positioning seat; 3 is the stator core; 4 is the liquid inlet connector; 4a is the main body; 4a1 is the liquid inlet section; 4a2 is the liquid outlet section; 4b is the positioning block; 5 is the fluid guide; 5a is the positioning column; 5b is the inlet surface; 5c is the weight reduction hole; and 6 is the sealing ring. Detailed Implementation

[0021] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0022] like Figure 1 and Figure 2 As shown, in the motor cooling structure, the motor includes a heat-conducting cylinder 1 and a motor barrel 2 arranged coaxially. The heat-conducting cylinder 1 is made of a thermally conductive material, preferably aluminum alloy. In actual products, the motor stator core 3 is fixed inside the heat-conducting cylinder 1, and the two are typically tightly fitted together. The motor barrel 2 is fitted outside the heat-conducting cylinder 1, and the two are fixedly connected.

[0023] like Figure 2 and Figure 3 As shown, the motor cooling structure includes a spiral groove 1a disposed on the outer surface of the heat-conducting cylinder 1, and the length of the spiral groove 1a extends axially along the heat-conducting cylinder 1. Figure 1 As shown, the barrel 2 has an inlet 2a and an outlet at both ends, and the inlet 2a and outlet are connected to both ends of the spiral groove 1a. A tubular inlet connector 4 is fixed inside the inlet 2a; a conical guide 5 is fixed on the bottom wall of the spiral groove 1a, and the guide 5 and the inlet connector 4 are coaxially arranged; the diameter of the guide 5 gradually increases from the inlet 2a towards the spiral groove 1a, and one end of the guide 5 extends into the inlet connector 4.

[0024] The conical guide fluid 5 extends into the liquid inlet connector 4, which can guide the cooling water to enter the spiral groove 1a more smoothly, reduce the turbulence and eddies of the water flow at the inlet of the spiral groove 1a, thereby improving the water flow introduction efficiency and improving the cooling effect of this cooling structure.

[0025] In this embodiment,

[0026] As Figure 3 shown, the liquid inlet connector 4 is structured as follows: the liquid inlet connector 4 comprises a straight pipe-shaped body 4a, and the body 4a and the flow guide 5 are coaxially arranged. The body 4a is composed of a liquid inlet section 4a1 and a liquid outlet section 4a2 which are continuously distributed along the axis of the body 4a, and the liquid inlet section and the liquid outlet section 4a2 are both straight pipe bodies, and the liquid outlet section 4a2 is inserted and fixed at the liquid inlet 2a away from the liquid inlet section 4a1. Further explanation, an annular groove is formed on the outer wall of the liquid outlet section 4a2, the annular groove is coaxially arranged with the liquid outlet section 4a2, and a sealing ring 6 is arranged in the annular groove, and the outer side surface of the sealing ring 6 is in contact with the inner wall of the liquid inlet 2a to form a reliable and stable seal between the liquid outlet section 4a2 and the inner wall of the liquid inlet 2a.

[0027] As Figure 2 and Figure 3 shown, the inner diameter of the liquid inlet section 4a1 is smaller than that of the liquid outlet section 4a2, and one end of the flow guide 5 extends into the liquid outlet section 4a2. The body 4a is divided into the liquid outlet section 4a2 with a larger inner diameter and the liquid inlet section 4a1 with a smaller inner diameter, and the flow guide 5 extends into the liquid outlet section 4a2, which can effectively avoid the blockage of the liquid outlet of the liquid inlet connector 4, further accelerate the efficiency of the cooling water introduction, and make the cooling effect of the cooling structure better.

[0028] The installation method of the liquid inlet connector 4 is as follows: positioning blocks 4b are formed on the outer walls of both sides of the liquid inlet section 4a1, the positioning blocks 4b are pressed on the barrel 2, and both positioning blocks 4b are fixed to the barrel 2 by screws.

[0029] As Figure 3 shown, the installation method of the flow guide 5 is as follows: a positioning column 5a is formed on the bottom surface of the flow guide 5, the positioning column 5a and the flow guide 5 are coaxially arranged and are an integral structure. A positioning groove with the same shape and size as the positioning column 5a is formed on the bottom surface of the spiral groove 1a, and the positioning column 5a is inserted into the positioning groove. The flow guide 5 is positioned by being inserted into the positioning groove through the positioning column 5a, so that the installation can be completed by simply pressing the flow guide 5 during assembly, effectively facilitating the assembly.

[0030] Further explanation, a tapered guide surface 5b is formed on the outer side surface of the end of the positioning column 5a away from the flow guide 5, which is used for guiding the insertion of the positioning column 5a, further facilitating the installation of the flow guide 5.

[0031] The connection between the heat-conducting cylinder 1 and the barrel 2 is as follows: the shape and size of the outer wall of the heat-conducting cylinder 1 match the inner wall of the barrel 2, and the heat-conducting cylinder 1 and the barrel 2 are fixed together by an interference fit. Further, an annular positioning seat 2b is formed on the inner wall of one end of the barrel 2. The positioning seat 2b is coaxially arranged with the barrel 2, and one end of the heat-conducting cylinder 1 presses against the positioning seat 2b. An annular limiting seat 1b is formed on the outer wall of the other end of the heat-conducting cylinder 1. The limiting seat 1b is coaxially arranged with the heat-conducting cylinder 1, and presses against the other end of the barrel 2. The positioning seat 2b and the limiting seat 1b, in cooperation, limit the relative position of the barrel 2 and the heat-conducting cylinder 1, facilitating assembly.

[0032] In actual products, such as Figure 3 As shown, the positioning post 5a has an axially arranged weight-reducing hole 5c. One end of the weight-reducing hole 5c extends to the fluid guide 5, and the other end extends to the end face of the positioning post 5a away from the fluid guide 5. The design of the weight-reducing hole 5c can simultaneously reduce the weight of the fluid guide 5 and the material input.

[0033] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

Claims

1. A motor cooling structure, the motor including a heat-conducting cylinder (1) for mounting a stator core (3) and a casing (2) sleeved on the heat-conducting cylinder (1), the cooling structure including a spiral groove (1a) provided on the outer side of the heat-conducting cylinder (1), the casing (2) being provided with an inlet (2a) and an outlet respectively communicating with the two ends of the spiral groove (1a), and a tubular inlet connector (4) fixed inside the inlet (2a), characterized in that, A conical guide fluid (5) is fixed on the bottom wall of the spiral groove (1a), and the guide fluid (5) and the inlet connector (4) are coaxially arranged; the diameter of the guide fluid (5) gradually increases from the inlet port (2a) toward the spiral groove (1a), and one end of the guide fluid (5) extends into the inlet connector (4).

2. The motor cooling structure according to claim 1, characterized in that, The above-mentioned liquid inlet connector (4) includes a straight tube-shaped main body (4a), and the main body (4a) and the guide fluid (5) are coaxially arranged; the main body (4a) is composed of a liquid inlet section (4a1) and a liquid outlet section (4a2) continuously distributed along the axial direction of the main body (4a), and the end of the liquid outlet section (4a2) away from the liquid inlet section (4a1) is inserted and fixed in the liquid inlet (2a); the inner diameter of the liquid inlet section (4a1) is smaller than the inner diameter of the liquid outlet section (4a2), and one end of the guide fluid (5) extends to the liquid outlet section (4a2).

3. The motor cooling structure according to claim 1 or 2, characterized in that, A positioning post (5a) is formed on the bottom surface of the guide fluid (5), and the positioning post (5a) and the guide fluid (5) are coaxially arranged; a positioning groove with a shape and size that matches the positioning post (5a) is opened on the bottom surface of the spiral groove (1a), and the positioning post (5a) is inserted into the positioning groove.

4. The motor cooling structure according to claim 3, characterized in that, The positioning post (5a) has an axially arranged weight reduction hole (5c), one end of which extends to the fluid guide (5), and the other end of which extends to the end face of the positioning post (5a) away from the fluid guide (5).

5. The motor cooling structure according to claim 3, characterized in that, The outer side of the end of the positioning post (5a) away from the fluid guide (5) is formed with a tapered guide surface (5b).

6. The motor cooling structure according to claim 1, characterized in that, The outer wall of the heat-conducting cylinder (1) and the inner wall of the barrel (2) are matched and an interference fit is formed between them.

7. The motor cooling structure according to claim 6, characterized in that, A ring-shaped positioning seat (2b) is formed on the inner wall of one end of the barrel (2), and one end of the heat-conducting cylinder (1) presses against the positioning seat (2b); a ring-shaped limiting seat (1b) is formed on the outer wall of the other end of the heat-conducting cylinder (1), and the limiting seat (1b) presses against the other end of the barrel (2).

Images