CN216699699U

CN216699699U - Three-phase line cooling circuit structure of oil-cooled motor

Info

Publication number: CN216699699U
Application number: CN202123093559.8U
Authority: CN
Inventors: 熊伟; 刘长来; 夏诗忠; 刘杨; 骆淼
Original assignee: Zhongkeluorui New Energy Technology Co ltd
Current assignee: Zhongkeluorui New Energy Technology Co ltd
Priority date: 2021-12-10
Filing date: 2021-12-10
Publication date: 2022-06-07
Anticipated expiration: 2031-12-10

Abstract

The utility model discloses a three-phase line cooling loop structure of an oil-cooled motor, which comprises a machine shell, a stator iron core arranged in the machine shell, a stator winding embedded on the inner circle of the stator iron core, a three-phase line connecting terminal connected to the outlet end of the stator winding, two oil collecting rings sleeved at the outer sides of the two ends of the stator winding and a rear end cover fixed at the rear end of the machine shell, wherein the rear end cover is provided with a hole through which the three-phase line connecting terminal can pass, the outer surface of the rear end cover is integrally formed with a side panel extending outwards, the side panel is provided with a groove capable of accommodating the three-phase line connecting terminal, an oil duct is arranged in the space below the groove of the side panel and is directly communicated with the inner circle surface of the rear end cover, and three oil holes which are mutually spaced are arranged between the bottom of the oil duct and correspond to the three-phase line connecting terminal one by one. The utility model has the advantages of compact structure, easy manufacture, low cost, controllable oil injection pressure and position, good cooling effect, small volume of the whole oil-cooled motor, light weight and reliable performance.

Description

Three-phase line cooling circuit structure of oil-cooled motor

Technical Field

The utility model relates to the technical field of motors, in particular to a three-phase line cooling circuit structure of an oil-cooled motor.

Background

The motor can generate a large amount of heat during continuous operation, and if the temperature of the motor is too high, the reliable operation and the performance of the motor can be influenced. At present driving motor's cooling method mainly divide into water-cooling and cold two kinds of modes of oil, and for water-cooling motor, oil-cooling motor has a great deal of advantage: the cooling efficiency is high, and the cooling medium is directly contacted with a heat source, so that hot spots are eliminated; the insulating property is good, and the cooling oil is non-conductive and non-magnetic, so that the electromagnetic field characteristic of the motor is not influenced; compared with water, the oil has high boiling point and low condensation point, is not easy to change phase, and has wider application range; the structure is compact, a flow passage does not need to be designed in the shell, and the size is small.

In the running process of the motor, the copper winding is a main heat source, the silicone tube and the heat shrinkage tube are sleeved outside the three-phase outgoing line, the heat dissipation condition is poor, the length of the three-phase outgoing line is long, the contact resistance of the joint of the terminal and the copper bar of the controller is large, and the heat productivity is large. Current oil-cooled motor, oil spout cooling position are mostly winding head, and three-phase line terminal natural cooling leads to three-phase line connecting terminal department temperature to be higher than the winding, forms the difference in temperature to influence the motor performance.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a three-phase line cooling circuit structure of an oil-cooled motor, which has the advantages of compact structure, controllable pressure, capability of cooling a stator winding and a three-phase lead simultaneously and good cooling effect, and overcomes the defects of the prior art.

In order to achieve the purpose, the utility model adopts the technical scheme that: a three-phase line cooling loop structure of an oil-cooled motor comprises a machine shell, a stator iron core arranged in the machine shell, a stator winding embedded on the inner circle of the stator iron core, a three-phase line connecting terminal connected to the outlet end of the stator winding, two oil collecting rings sleeved on the outer sides of two ends of the stator winding and a rear end cover fixed at the rear end of the machine shell, wherein an oil inlet is formed in the outer surface of the front end of the machine shell; the two oil collecting rings are respectively in sealing fit with the inner circular surface of the shell, the end surface of the stator core and the inner circular surface of the rear end cover, wherein the oil collecting ring at the front end is positioned right below an oil inlet of the shell, and each oil collecting ring is provided with a plurality of oil spray holes which are uniformly distributed; the rear end cover is provided with a hole through which a three-phase line connecting terminal can pass, a side panel extending outwards is integrally formed on the outer surface of the rear end cover, a groove capable of containing the three-phase line connecting terminal is formed in the side panel, the three-phase line connecting terminal penetrates out of the hole and then is arranged in the groove, an oil duct is arranged in a space below the groove of the side panel and is communicated with the inner circular surface of the rear end cover, and three oil holes which are mutually spaced are formed between the oil duct and the bottom of the groove and correspond to the three-phase line connecting terminal one by one.

The oil duct is arranged on the side panel of the rear end cover, the three oil holes are arranged between the oil duct and the bottom of the groove at intervals and respectively correspond to the three-phase line connecting terminals one by one, and the oil inlet on the shell, the axial oil groove on the stator core, the oil spraying hole on the oil collecting ring, and the oil duct and the oil holes on the rear end cover form a cooling loop of the three-phase line connecting terminals of the oil-cooled motor.

Drawings

FIG. 1 is an exploded perspective view of the present invention;

fig. 2 is a schematic view of the structure of the stator core of fig. 1;

FIG. 3 is a schematic structural view of the rear end cap of FIG. 1;

FIG. 4 is a schematic view of the rear end cap of FIG. 1 at another angle;

fig. 5 and 6 are cross-sectional views of different cross-sections of the present invention, respectively.

In the figure: 1-a machine shell; 11-an oil inlet; 2-a stator core; 21-a welding groove; 22-axial oil groove; 3-a stator winding; a 4-three-phase line connection terminal; 5-oil collecting ring; 51-oil spray holes; 6-rear end cap; 61-hole; 62-side panel; 63-grooves; 64-oil duct; 65-oil hole.

Detailed Description

The utility model will be further described in detail with reference to examples of embodiments shown in the drawings to which, however, the utility model is not restricted.

As shown in fig. 1, the three-phase line cooling circuit structure of an oil-cooled motor provided by the utility model comprises a casing 1, a stator core 2 installed in the casing 1, a stator winding 3 embedded on the inner circle of the stator core 2, a three-phase line connecting terminal 4 connected to the outlet end of the stator winding 3, two oil collecting rings 5 sleeved on the outer sides of the two ends of the stator winding 3, and a rear end cover 6 fixed at the rear end of the casing 1. The outer surface of the front end of the machine shell 1 is provided with an oil inlet 11, the stator core 2 is formed by laminating a plurality of silicon steel sheets, six welding grooves 21 with wave structures are uniformly distributed on the outer surface of the stator core, the welding grooves are used for welding and fixing the silicon steel sheets and axially communicating oil, a plurality of axial oil grooves 22 (shown in figure 2) are arranged between every two welding grooves 21, the two oil collecting rings 5 are respectively matched with the inner circular surface of the machine shell 1, the end surface of the stator core 2 and the inner circular surface of the rear end cover 6 in a sealing manner, wherein the oil collecting ring 5 at the front end is positioned under the oil inlet 11 of the machine shell 1, a plurality of oil spraying holes 51 are uniformly distributed on each oil collecting ring 5, and in the embodiment, two rows of twenty-four oil spraying holes 51 with the diameter of 2mm are uniformly distributed on each oil collecting ring 5.

As shown in fig. 3, 4 and 6, the rear end cover 6 is provided with a hole 61 through which the three-phase line connecting terminal 4 can pass, a side plate 62 extending outward is integrally formed on the outer surface of the rear end cover 6, the side plate 62 is provided with a groove 63 capable of accommodating the three-phase line connecting terminal 4, the three-phase line connecting terminal 4 is arranged in the groove 63 after penetrating through the hole 61, the side plate 62 is provided with an oil passage 64 in a space below the groove 63 and is communicated with the inner circular surface of the rear end cover 6, and three oil holes 65 spaced from each other are formed between the oil passage 64 and the bottom of the groove 63 and correspond to the three-phase line connecting terminal 4 one by one.

As shown in fig. 5 and 6, when the motor works, cooling oil is pressed into the housing 1 from the oil inlet 11 through an external oil pump, flows around from the front end oil collecting ring to the rear end oil collecting ring along the axial oil passage 22 of the stator core 2, and is sprayed to the end of the stator winding 3 from the oil spray holes 51 of the oil collecting rings 5 at the two ends, part of the cooling oil flows into the oil passage 64 on the rear end cover 6 from the rear end oil collecting ring 5, and is finally sprayed onto the three-phase line connecting terminal 4 from the three oil holes 65, heat exchange is performed through spraying and flowing of the cooling oil, the temperatures of the stator core 2, the stator winding 3 and the three-phase line connecting terminal 4 are reduced, the cooling oil after heat exchange flows out of the motor, cooling is performed through a heat exchanger outside the motor, and is pumped into the motor again through the external oil pump, so as to form an oil cooling cycle, and reduce the temperature of the motor.

According to the utility model, the oil duct 64 is arranged on the side panel 62 of the rear end cover 6, the three oil holes 65 are arranged between the oil duct 64 and the bottom of the groove 63 at intervals and are respectively in one-to-one correspondence with the three-phase line connecting terminal 4, and the oil inlet 11 on the machine shell 1, the axial oil groove 22 on the stator core 2, the oil spray hole 51 on the oil collecting ring 5, the oil duct 64 and the oil holes 65 on the rear end cover 6 form a cooling loop of the three-phase line connecting terminal of the oil-cooled motor.

Claims

1. The utility model provides a three-phase line cooling circuit structure of oil-cooled motor, includes the casing, installs the stator core in the casing, inlays the stator winding of establishing in stator core circle, connects the three-phase line connecting terminal on the stator winding leading-out terminal, cup joints two oil collecting rings in the stator winding both ends outside and fixes the rear end cap at the casing rear end, its characterized in that: the outer surface of the front end of the shell is provided with an oil inlet, the stator core is formed by laminating a plurality of silicon steel sheets, six welding grooves with wave-shaped structures are uniformly distributed on the outer surface of the stator core, and a plurality of axial oil grooves are formed between every two welding grooves; the two oil collecting rings are respectively in sealing fit with the inner circular surface of the shell, the end surface of the stator core and the inner circular surface of the rear end cover, wherein the oil collecting ring at the front end is positioned right below an oil inlet of the shell, and each oil collecting ring is provided with a plurality of oil spray holes which are uniformly distributed; the rear end cover is provided with a hole through which a three-phase line connecting terminal can pass, a side panel extending outwards is integrally formed on the outer surface of the rear end cover, a groove capable of containing the three-phase line connecting terminal is formed in the side panel, the three-phase line connecting terminal penetrates out of the hole and then is arranged in the groove, an oil duct is arranged in a space below the groove of the side panel and is communicated with the inner circular surface of the rear end cover, and three oil holes which are mutually spaced are formed between the oil duct and the bottom of the groove and correspond to the three-phase line connecting terminal one by one.

2. The three-phase line cooling circuit structure of an oil-cooled motor according to claim 1, characterized in that: and two rows of twenty-four oil spray holes are uniformly distributed on each oil collecting ring.

3. The three-phase line cooling circuit structure of an oil-cooled motor according to claim 2, characterized in that: the diameter of the oil spray hole is 2 mm.