CN221995266U

CN221995266U - A cooling system and a motor

Info

Publication number: CN221995266U
Application number: CN202420593469.XU
Authority: CN
Inventors: 李磊; 王艳坤; 何韬
Original assignee: Suzhou Lvkon New Energy Technology Co ltd
Current assignee: Suzhou Lvkon New Energy Technology Co ltd
Priority date: 2024-03-26
Filing date: 2024-03-26
Publication date: 2024-11-12
Anticipated expiration: 2034-03-26

Abstract

The utility model provides a cooling system and a motor, and relates to the technical field of motors. The cooling system includes an oil collecting part, a water cooling pipeline and a pumping part. The oil collecting part is connected to the housing of the motor, and the oil collecting part can collect the cooling oil sprayed from the oil injection system of the motor; the water cooling pipeline is at least partially distributed in the oil collecting part; the pumping part is respectively connected to the oil collecting part and the oil injection system, and the pumping part can pump the cooling oil in the oil collecting part to the oil injection system. The cooling system provided by the utility model can highly integrate the water cooling system and the oil cooling system of the motor, and realize that the water cooling system replaces the peripheral oil cooler, radiator and other components of the oil cooling system, and has dual cooling of water cooling and oil cooling, which can improve the rated performance of the motor to the extreme, and is a new and efficient solution.

Description

Cooling system and motor

Technical Field

The utility model relates to the technical field of motors, in particular to a cooling system and a motor.

Background

With the development of new energy automobile industry, more and more motors adopt an oil cooling system. The oil cooling system directly sprays oil to the end of the stator winding for cooling, the heat transfer path is more direct, the cooling efficiency is higher, and the performance of the driving motor can be exerted to the greatest extent. However, the oil injection system has the phenomenon that oil injection is uneven and local overheating occurs, and the oil way structure of the oil cooling system is complex and high in cost, and additional oil pumps, oil filters, oil pipes, oil coolers, water pipes, radiators and the like are needed.

Disclosure of utility model

In view of the above, the utility model aims to overcome the defects in the prior art, and provides a cooling system, which integrates a water cooling system and an oil cooling system to a high degree, wherein the water cooling system replaces parts such as a peripheral oil cooler and a radiator of the oil cooling system, and the water cooling system and the oil cooling system are used for double cooling, so that the rated performance of a motor can be improved to the greatest extent, and the cooling system is a brand new and efficient solution;

in addition, a motor applying the cooling system is provided.

The utility model provides the following technical scheme:

According to a first aspect of the present disclosure, there is provided a cooling system comprising:

The oil collecting piece is connected to the shell of the motor and can collect cooling oil sprayed out of an oil spraying system of the motor; and

The water cooling pipeline is at least partially distributed on the oil collecting piece; and

The pumping and draining piece is respectively connected with the oil collecting piece and the oil injection system, and can pump and drain the cooling oil liquid in the oil collecting piece to the oil injection system.

Further, the water cooling pipeline is further distributed in the machine shell, and the part of the water cooling pipeline distributed in the machine shell is cylindrical and spiral.

Further, the oil collecting member includes an oil pan mounted at a bottom end of the casing, and an oil collecting chamber is formed between the oil pan and the casing, and is configured to allow the cooling oil sprayed from the oil spraying system to flow in.

Further, a first heat dissipation part extending into the oil collecting cavity is arranged on the cavity wall of the oil collecting cavity;

And/or the outer side of the oil pan is provided with a second heat dissipation part.

According to a second aspect of the present disclosure, there is provided an electric machine comprising any one of the cooling systems.

Further, the fuel injection system includes:

The first oil injection pipeline is connected with the pumping unit, and is provided with a first oil injection port which faces towards the coil of the motor.

Further, the first fuel injection line includes:

The first oil injection pipe section extends along the circumferential direction of the shell, and is provided with a plurality of oil injection holes which are arranged at intervals along the extending direction of the first oil injection pipe section, and the oil injection holes form a first oil injection port.

Further, a first groove is formed in the inner side of the shell, and the first groove extends along the circumferential direction of the shell; wherein, the first slot and the motor stator of the motor can form the first fuel injection pipe section.

Further, the first oil injection pipeline is located at least partially the top of casing, the motor has the bearing room, the bearing room orientation one side of the top of casing is provided with the oil collecting groove, the oil collecting groove can collect from the oil injection pipeline sprays the cooling fluid, the cell wall of oil collecting groove is provided with the oilhole, the oilhole with the bearing room intercommunication.

Further, the motor is provided with a rear end cover, and an observation window is arranged at a position, close to the top end of the shell, of the rear end cover.

Embodiments of the present utility model have the following advantages:

By adopting the cooling system provided by the utility model, the oil cooling system and the water cooling system are highly integrated, the oil pan at the bottom of the shell is provided with the integrated heat exchange structure, and the oil pump is integrally designed, so that the structures such as an oil cooler and an oil pipe at the periphery are omitted, and the whole structure is compact. Specifically, by arranging the spiral water channel inside the casing and arranging the cooling interface connected with the spiral water channel on the surface of the casing, the circulation of the water cooling system is realized, and the heat of heat conduction from the stator of the driving motor to the casing is taken away. And the oil spraying pipes and the oil spraying grooves are arranged at the two sides of the shell corresponding to the positions of the coils, so that the spraying oil cooling of the end part of the stator is realized, and the heat of the stator coils is taken away. The rear end cover of the motor is integrated with an oil pump and an oil duct, one side of the oil duct is connected with an oil pan of the motor shell, the other side of the oil duct is connected with an oil injection pipe and an oil injection groove through the oil duct on the motor shell, and the bottom of the inner side of the motor shell is provided with an oil return groove which is communicated with the oil pan, so that a complete oil absorption-oil injection-oil return path is formed. Meanwhile, oil collecting grooves and oil holes are designed at the upper parts of the bearing chambers of the front end cover and the rear end cover, so that lubrication of bearings is realized.

Therefore, the cooling system is highly integrated in structure, the structure of the cooling system is simplified, the cooling system is simple and compact, the two cooling systems act together, more heat is taken away, the power density and the torque density of the driving system are improved, the size is reduced, and the cost of the driving motor is reduced.

In addition, the utility model also relates to a motor, and since the cooling system has the technical effects, the motor comprising the cooling system has the same technical effects and is not repeated herein.

In order to make the above objects, features and advantages of the present utility model more comprehensible, preferred embodiments accompanied with figures are described in detail below.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present utility model and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic structural view of an electric motor according to an embodiment of the present utility model;

FIG. 2 shows a cross-sectional view A-A in FIG. 1;

Fig. 3 shows a schematic diagram of a two-view structure of a motor according to an embodiment of the utility model.

Description of main reference numerals:

100-bearing chamber; 200-oil collecting grooves; 300-non-outgoing line end coil; 400-a first fuel injection pipe section; 500-water cooling pipelines; 600-shell; 610-an oil return groove; 620-a rear end cap; 700-oil pan; 800-a first heat sink; 900-an oil collecting cavity; 1000-radiating fins; 1100-pumping and exhausting piece; 1200-wire outlet end coil.

Detailed Description

Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the utility model.

It will be understood that when an element is referred to as being "fixed to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. In contrast, when an element is referred to as being "directly on" another element, there are no intervening elements present. The terms "vertical," "horizontal," "left," "right," and the like are used herein for illustrative purposes only.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present utility model, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs. The terminology used in the description of the templates herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.

In the related art, an oil-cooled motor is a motor that controls an internal temperature using an oil circulation cooling system. The motor design is mainly used for application occasions requiring efficient cooling, particularly equipment with high workload, long continuous running time or severe environmental conditions, such as industrial automation equipment, large mechanical equipment, driving motors of new energy automobiles and the like. Compared with the traditional air cooling or natural cooling mode, the oil cooling motor can more effectively carry heat generated when the motor runs by immersing motor windings, bearings or other key heating components in circulating flowing oil or forcibly cooling the parts through an oil way, so that the motor is maintained to run at a proper working temperature, the reliability of the motor is improved, and the service life of the motor is prolonged. In the field of new energy automobiles, with the improvement of motor power density and continuous output power requirements, an oil-cooled motor is becoming an important technical development trend due to its excellent heat dissipation performance and the capability of directly cooling a heat source. The electric vehicle can be helped to achieve higher performance, longer endurance mileage and better overall energy efficiency performance.

With the development of new energy automobile industry, more and more motors adopt an oil cooling system. The oil cooling system directly sprays oil to the end of the stator winding for cooling, the heat transfer path is more direct, the cooling efficiency is higher, and the performance of the driving motor can be exerted to the greatest extent. However, the oil cooling system has the phenomenon that oil injection is uneven and local overheating occurs, and the oil path structure is complex and has high cost, and additional oil pumps, oil filters, oil pipes, oil coolers, water pipes, radiators and the like are needed.

In order to solve the above-mentioned problems, according to a first aspect of the present disclosure, as shown in fig. 1 and 2, there is provided a cooling system comprising an oil collecting member, a water cooling pipe 500 and a pumping unit 1100, wherein the oil collecting member is connected to a casing 600 of a motor, and the oil collecting member can collect cooling oil sprayed from an oil spraying system of the motor; the water cooling pipeline 500 is at least partially distributed on the oil collecting piece; the pumping unit 1100 is respectively connected with the oil collecting unit and the oil injection system, and the pumping unit 1100 can pump and discharge the cooling oil in the oil collecting unit to the oil injection system.

It will be readily appreciated that the oil spray system is used to spray cooling oil onto components within the housing 600 that require cooling, such as stator coils of an electric machine, bearings, and the like. When the motor works, the oil injection system is used for spraying cooling oil liquid after cooling (in a low-temperature state) to the parts to be cooled, so that the cooling oil liquid flowing through the surfaces of the parts to be cooled exchanges heat, and cooling is realized.

In this embodiment, the oil collecting member collects the cooling oil sprayed from the oil spraying system, and the water cooling pipeline 500 is additionally arranged in the casing 600 of the motor, so that the temperature of the cooling oil rises after contacting the components to be cooled, and the cooling water flowing in the water cooling pipeline 500 can contact the oil collecting member, and then the cooling water exchanges heat with the cooling oil in the oil collecting member through the oil collecting member, so as to cool the cooling oil. Obviously, because the cooling pipeline is in contact with the machine shell 600, the cooling water can exchange heat with the machine shell 600, so that the effect of cooling the internal components of the machine shell 600 is achieved, and the situation of local overheating of the motor caused by uneven oil injection cooling can be relieved.

By adopting the cooling system provided by the utility model, the cooling system is highly integrated by adopting the oil cooling system and the water cooling system, the oil pan 700 positioned at the bottom of the shell 600 integrates a heat exchange structure, and the oil pump is integrally designed, so that the structures such as an oil cooler and an oil pipe at the periphery are omitted, and the whole structure is compact. Specifically, by providing a spiral water channel inside the casing 600 and providing a cooling interface connected to the spiral water channel on the surface of the casing 600, a water cooling system circulation is realized, and heat conducted from the stator of the driving motor to the casing 600 is taken away. And, through arranging the oil spray pipe and the oil spray groove at the two sides of the machine shell 600 corresponding to the positions of the coils, the spraying oil cooling on the end part of the stator is realized, and the heat of the stator coils is taken away. Wherein, the rear end cap 620 of the motor is integrated with an oil pump and an oil duct, one side of the oil duct is connected with the oil pan 700 of the casing 600, the other side of the oil duct is connected with an oil injection pipe and an oil injection groove through the oil duct on the casing 600, and the bottom of the inner side of the casing 600 is provided with an oil return groove 610, and the oil return groove 610 is communicated with the oil pan 700, thereby forming a complete oil absorption-oil injection-oil return path. Meanwhile, the upper parts of the bearing chambers 100 of the front and rear end caps 620 are designed with oil sumps 200 and oil holes to lubricate the bearings.

As shown in fig. 2, on the basis of the above embodiment, the water cooling pipes 500 are further distributed in the casing 600, and the portion of the water cooling pipes 500 distributed in the casing 600 is cylindrical and spiral.

Illustratively, the water-cooling pipeline 500 includes a first portion distributed in the oil collecting member and a second portion distributed in the casing 600, where the second portion is cylindrical and spiral, that is, the second portion is wrapped in the casing 600, for example, an axis of the cylindrical spiral of the second portion coincides with an axis of the motor. Obviously, cooling water can be realized to cool down the casing 600 through the second part to reach the part cooling to casing 600 inside, do benefit to the cooling efficiency who improves the motor.

It should be noted that by adding the second portion to the casing 600, effects that cannot be achieved by using the oil cooling system, for example, some components in the motor cannot be cooled by spraying the cooling oil, but the heat generation of these components is not so obvious. However, cooling the casing 600 through the second portion of the water cooling pipeline 500 can achieve the purpose of reducing the temperature of the components which cannot be cooled by the oil, and prolonging the service life of the components.

For example, the case 600 is mostly formed by casting, and the second portion of the water cooling pipe 500 may be integrally formed by casting the case 600, that is, a water course through which cooling water flows can be formed in the case 600 by providing a corresponding process during casting the case 600. Without being limited in detail herein, it is not a technical problem for one skilled in the art how to realize the conventional arrangement of forming the water channel when casting the casing 600.

As shown in fig. 1, the oil collecting member includes an oil pan 700 mounted at the bottom end of the casing 600, and an oil collecting chamber 900 is formed between the oil pan 700 and the casing 600, and the oil collecting chamber 900 is configured to allow cooling oil sprayed from the oil spraying system to flow in.

The bottom of the inner side of the casing 600 is provided with an oil return groove 610, the outer side of the bottom of the casing 600 is provided with an oil pan 700, the oil pan 700 is communicated with the oil return groove 610, and in operation, cooling oil sprayed from the oil spraying system flows into the oil return groove 610 under the action of gravity to be converged and flows into an oil collecting cavity 900 formed between the oil pan 700 and the bottom of the casing 600, so that the cooling oil in the oil collecting cavity 900 can be cooled through a water cooling pipeline 500 distributed at the oil pan 700. Obviously, the arrangement can replace the traditional mode to cool the cooling oil liquid through the water cooling pipeline 500, and the installation of an additional oil pump, an oil filter, an oil pipe, an oil cooler, a water pipe, a radiator and the like is omitted.

As shown in fig. 2 and 3, on the basis of the above embodiment, the chamber wall of the oil collecting chamber 900 is provided with a first heat radiating portion 800 extending into the oil collecting chamber 900;

That is, by providing the first heat radiating portion 800, a contact area between the cooling oil and the casing 600 is increased, and heat radiating efficiency is improved.

Illustratively, the first heat dissipation portion 800 includes a plurality of layers of partition plates and heat dissipation columns disposed inside the oil pan 700, and the plurality of layers of partition plates and heat dissipation columns can form a meandering oil passage, so that cooling oil flows along the oil passage, and efficient heat exchange between the cooling oil and cooling water is achieved.

In addition, an oil drain hole screw is provided on the bottom plate of the oil pan 700 to facilitate periodic replacement of the cooling oil.

As shown in fig. 2, on the basis of the above embodiment, the outside of the oil pan 700 is provided with a second heat radiation portion.

Illustratively, the second heat dissipating part includes heat dissipating fins 1000 uniformly and densely arranged on the outer side surface of the oil pan 700, and the heat dissipating fins 1000 contact with the outside air to enhance the air-cooling heat dissipating effect. The heat dissipation tooth sheet 1000 adopts a friction welding process to form an integrated structure with the casing 600, and multiple rib plates are arranged on two sides of the oil pan 700, so that the air cooling heat dissipation effect is further enhanced.

In one embodiment, an electric machine is provided that includes the cooling system described in any of the embodiments above.

Since the above cooling system has the above technical effects, the motor including the cooling system should have the same technical effects, and will not be described herein.

As shown in fig. 2, the fuel injection system includes a first fuel injection line, which is connected to the pumping unit 1100 and has a first fuel injection port facing the coil of the motor, on the basis of the above embodiment.

It should be noted that, the main heating component of the motor is a coil, the coil includes an outgoing end coil 1200 and a non-outgoing end coil 300, the outgoing end coil 1200 is disposed at the front end of the motor, and the non-outgoing end coil 300 is disposed at the rear end of the motor. That is, it is necessary to primarily cool the outlet coil 1200 and the non-outlet coil 300.

Therefore, cooling oil with set pressure is introduced into the first oil injection port and sprayed to the coil from the first oil injection port, so that the temperature of the coil is reduced. But is not limited to a coil, and other components capable of spraying cooling oil in a motor are suitable.

As shown in fig. 2, on the basis of the above-described embodiment, the first injection line includes a first injection line segment 400, the first injection line segment 400 extends in the circumferential direction of the casing 600, and the first injection line segment 400 has a plurality of injection holes that are disposed at intervals along the extending direction thereof, and the injection holes form a first injection port.

Illustratively, the inner wall of the casing 600 is provided with semicircular grooves, the grooves extend along the circumferential direction of the casing 600, the first fuel injection pipe section 400 is installed in the grooves to occupy the space in the casing 600, the fuel injection holes are uniformly distributed in the first fuel injection pipe section 400, optionally, the number of the fuel injection holes is 10-20, and the fuel injection holes are aligned to the middle of the coil, so that a simple and efficient winding spray structure is formed.

Of course, the first injection line also includes a second injection line segment that can spray cooling oil to other components, which is not particularly limited herein.

As shown in fig. 2, on the basis of the above embodiment, the inside of the casing 600 is provided with a first groove extending in the circumferential direction of the casing 600; wherein the first groove and the motor stator of the motor can form a first fuel injection pipe segment 400.

For example, a first groove is dug at a position 3-5mm away from the shoulder of the inner wall of the casing 600, after the motor stator is sleeved in the casing 600, the outer circle of the motor stator and the first groove form a cavity, the cavity is the first oil injection pipe section 400, the first groove drills an oil injection hole along the axial direction of the motor, and the oil outlet position is aligned with the middle part of the wire outlet end coil 1200 and/or the non-wire outlet end coil 300, so that the cooling of the motor is realized.

As shown in fig. 2, on the basis of the above embodiment, the first oil injection pipeline is at least partially located at the top end of the casing 600, the motor has a bearing chamber 100, one side of the bearing chamber 100 facing the top end of the casing 600 is provided with an oil sump 200, the oil sump 200 can collect cooling oil sprayed from the oil injection pipeline, and the wall of the oil sump 200 is provided with an oil hole, which communicates with the bearing chamber 100.

In this embodiment, the oil sump 200 is disposed on the side of the bearing chamber 100 of the motor facing upwards, so as to collect the cooling oil sprayed on the coil, so that the cooling oil flows into the bearing chamber 100 to lubricate the bearing.

As shown in fig. 1, the motor has a rear cover 620, and a viewing window is provided at a position of the rear cover 620 near the top end of the casing 600, based on the above embodiment.

In this embodiment, an observation window is provided at the upper end of the rear end cap 620, and the observation window can be opened or closed, so that the oiling and the spraying effect observation are facilitated.

In addition, a detachable cover plate is provided at the lower end of the rear cover 620, thereby facilitating fault maintenance.

On the basis of the above embodiment, the pumping and draining member comprises an oil pump, the rear end cover of the motor is integrated with the oil pump, and is provided with an oil inlet channel communicated with the oil pan, an oil filter is arranged in the oil inlet channel, an oil outlet channel is communicated with an oil injection system on the casing, an inlet of the oil pump is connected with the oil inlet channel, and an outlet of the oil pump is connected with the oil outlet channel so as to supply oil to the first oil injection pipe sections 400 on two sides of the oil pump.

Any particular values in all examples shown and described herein are to be construed as merely illustrative and not a limitation, and thus other examples of exemplary embodiments may have different values.

It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.

The above examples merely represent a few embodiments of the present utility model, which are described in more detail and are not to be construed as limiting the scope of the present utility model. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the utility model, which are all within the scope of the utility model.

Claims

1. A cooling system, the cooling system comprising:

2. The cooling system of claim 1, wherein the water cooling pipes are further distributed in the housing, and a portion of the water cooling pipes distributed in the housing is in a cylindrical spiral extending arrangement.

3. The cooling system of claim 1, wherein the oil collection member includes an oil pan mounted to a bottom end of the housing, and an oil collection chamber is formed between the oil pan and the housing, the oil collection chamber being configured to enable inflow of the cooling oil ejected from the oil injection system.

4. A cooling system according to claim 3, wherein the chamber wall of the oil collecting chamber is provided with a first heat radiating portion extending into the oil collecting chamber;

5. An electric machine, characterized in that it comprises a cooling system according to any one of claims 1 to 4.

6. The electric machine of claim 5, wherein the fuel injection system comprises:

7. The electric machine of claim 6, wherein the first oil injection line comprises:

8. The motor of claim 7, wherein a first groove is provided inside the casing, the first groove extending in a circumferential direction of the casing; wherein, the first slot and the motor stator of the motor can form the first fuel injection pipe section.

9. The motor of claim 6, wherein the first oil injection line is at least partially located at a top end of the housing, the motor has a bearing chamber, a side of the bearing chamber facing the top end of the housing is provided with an oil sump, the oil sump is capable of collecting the cooling oil sprayed from the oil injection line, a wall of the oil sump is provided with an oil hole, and the oil hole is communicated with the bearing chamber.

10. The motor of claim 5, wherein the motor has a rear end cap provided with a viewing window near a top end of the housing.