CN213879563U

CN213879563U - Stator cooling loop of oil-cooled motor

Info

Publication number: CN213879563U
Application number: CN202023081914.5U
Authority: CN
Inventors: 熊伟; 刘长来; 夏诗忠; 吴银龙; 骆淼; 殷武军
Original assignee: Zhongkeluorui New Energy Technology Co ltd
Current assignee: Zhongkeluorui New Energy Technology Co ltd
Priority date: 2020-12-21
Filing date: 2020-12-21
Publication date: 2021-08-03
Anticipated expiration: 2030-12-21

Abstract

The utility model discloses a stator cooling circuit of oil-cooled motor, including the casing, install stator core in the casing, inlay and establish stator winding and fix the rear end cap at the casing rear end on circle in stator core, be equipped with the oil inlet on the casing front end surface, stator core is folded by plural silicon steel sheet and is pressed and form, and its surface equipartition has the welding groove of six wave structures, is equipped with a plurality of axial oil grooves between per two welding grooves, a collection oil ring has respectively been cup jointed in the stator winding both ends outside, two collection oil rings respectively with the interior disc seal cooperation of circle of casing, stator core terminal surface and rear end cap in, one of them collection oil ring is located the casing oil inlet under, and the equipartition has a plurality of nozzle openings on every collection oil ring. The utility model discloses constitute the stator cooling circuit of oil-cooled motor by casing oil inlet, stator core axial oil groove and collection oil ring nozzle opening, its compact structure, oil injection pressure and oil spout position are controllable, and the cooling effect is good.

Description

Stator cooling loop of oil-cooled motor

Technical Field

The utility model relates to the technical field of electric machines, more specifically say, especially, relate to a stator cooling circuit of oil-cooled motor.

Background

The driving 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. In order to maintain the normal operation of the motor, a special cooling structure is generally required to be designed on the motor to remove heat generated during the operation of the motor. Common cooling methods include air cooling, liquid cooling, oil cooling, and the like, or increase the size of the motor to improve the heat dissipation effect of the motor. At present, most of common motors for pure electric vehicles in the market are mainly water-cooled, namely, a flow passage is processed in a motor shell, and cooling water circularly flows in the flow passage of the motor shell so as to take away heat generated by a stator and a rotor of the motor. Since the cooling water is not directly contacted with the heat source (stator and rotor), the cooling effect is general, and in addition, the flow channel structure is reserved in the casing, which causes the increase of the volume of the motor and the increase of the manufacturing cost. With the increasing requirements on the power, performance and cost of the motor, the conventional air cooling and water cooling methods cannot meet the requirements, and the oil-cooled motor gradually becomes a research hotspot.

The oil cooling motor can be divided into a spray cooling structure and a jet cooling structure according to whether the pressure of the cooling liquid flows out from the oil hole or not. The structure of spraying the cooling mode generally contains oil pump and oil groove, and the oil groove is located motor stator subassembly directly over, and open the oil groove bottom has the oilhole, and during the oil pump sent oil to the oil groove, oil drenched motor stator surface through the oilhole and cools off under the effect of gravity. Oil groove needs occupation space in the cooling mode that sprays, leads to the motor volume grow, and the blowout pressure of oil can not be controlled.

The structure of the spray cooling mode generally comprises an oil pump and an oil pipe, wherein the oil pipe is a sealed pipeline, an oil hole is formed in the oil pipe, the oil pump presses oil into the oil pipe and generates pressure, and the oil with the pressure is sprayed to the surface of a motor stator from the oil hole to be cooled. The oil pipe in the spray cooling mode needs to occupy space, so that the volume of the motor is increased, but the spray pressure and the position of the oil are controllable.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to the not enough of above-mentioned prior art, provide a stator cooling circuit of oil-cooled motor, compact structure, pressure are controllable, the cooling effect is good.

In order to achieve the above object, the utility model adopts the following technical scheme: a stator cooling loop of an oil cooling 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 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 stator iron core is formed by laminating a plurality of silicon steel sheets, six welding grooves with wave structures are uniformly distributed in the outer surface of the stator iron core, a plurality of axial oil grooves are formed between every two welding grooves, the outer sides of the two ends of the stator winding are respectively sleeved with an oil collecting ring, the two oil collecting rings are respectively in sealing fit with the inner circle surface of the machine shell, the end surface of the stator iron core and the inner circle surface of the rear end cover, one oil collecting ring is positioned under the oil inlet of the machine shell, and a plurality of oil spraying holes are uniformly distributed on each oil collecting ring.

The utility model discloses a set up the oil inlet on the casing, set up the axial oil groove on the stator iron core, install the collection oil ring of taking the oil spout hole additional at stator winding both ends simultaneously, constitute the stator cooling circuit of the cold motor of oil by oil inlet, axial oil groove and oil spout hole, its compact structure, easily make, with low costs, oil injection pressure and oil spout position are controllable, and the cooling effect is good, and whole cold motor of oil is small, light in weight, the dependable performance.

Drawings

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

fig. 2 is a cross-sectional view of the present invention;

fig. 3 is a schematic view of a structure of the stator core of fig. 1.

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; 4-oil collecting ring; 41-oil spray holes; 5-rear end cap.

Detailed Description

The present invention will be described in further detail with reference to the following examples, which are not intended to limit the invention.

As shown in fig. 1 and 2, the present invention provides a stator cooling circuit of an oil-cooled motor, which 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, and a rear end cap 5 fixed at the rear end of the casing 1, wherein an oil inlet 11 is arranged on the outer surface of the front end of the casing 1, 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 2 for welding and fixing the silicon steel sheets and axially passing oil, a plurality of axial oil grooves 22 (as shown in fig. 3) are arranged between every two welding grooves 21, an oil collecting ring 4 is respectively sleeved on the outer side of each of the two ends of the stator winding 3, the two oil collecting rings 4 are respectively in sealing fit with the inner circle surface of the casing 1, the end surface of the stator core 2, and the inner circle surface of the rear end cap 5, one oil collecting ring 4 is located under the oil inlet 11 of the casing 1, and a plurality of oil spray holes 41 are uniformly distributed on each oil collecting ring 4.

When the motor works, cooling oil is pressed into the shell 1 from the oil inlet 11 through an external oil pump and is sprinkled on the oil collecting ring 4 below the oil inlet 11, part of the oil is sprayed onto the end part of the stator winding 3 on one side from the oil spray hole 41 of the oil collecting ring 4, the rest oil flows to the other oil collecting ring 4 through the axial oil groove 22 of the stator core 2 and is sprayed onto the end part of the stator winding 3 on the other side from the oil spray hole 41 of the oil collecting ring 4, heat exchange is carried out through the spraying and flowing of the cooling oil, the temperature of the stator winding 3 and the temperature of the stator core 2 are reduced, the cooling oil after heat exchange flows out of the motor, the cooling is carried out through a heat exchanger outside the motor, the motor is pumped into the external oil pump again, oil cooling circulation is formed, and the temperature of the motor is reduced.

The utility model discloses a set up oil inlet 11 on casing 1, set up axial oil groove 22 on stator core 2, install the collection oil ring 4 of taking nozzle 41 additional at 3 both ends of stator winding simultaneously, constitute the stator cooling circuit of the cold motor of oil by oil inlet 11, axial oil groove 22 and nozzle 41, its compact structure, easily make, with low costs, injection pressure and oil spout position are controllable, the cooling effect is good, whole cold motor of oil is small, light in weight, the dependable performance.

Claims

1. The utility model provides a stator cooling circuit of oil-cooled motor, includes the casing, installs the stator core in the casing, inlays the stator winding of establishing on stator core circles and fixes the rear end cap at the casing rear end, its characterized in that: the stator winding is characterized in that an oil inlet is formed in the outer surface of the front end of the shell, the stator core is formed by laminating a plurality of silicon steel sheets, six welding grooves with wave structures are uniformly distributed in the outer surface of the stator core, a plurality of axial oil grooves are formed between every two welding grooves, oil collecting rings are respectively sleeved on the outer sides of two ends of the stator winding and 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, one oil collecting ring is located right below the oil inlet of the shell, and a plurality of oil spraying holes are uniformly distributed in each oil collecting ring.