CN213585387U - Oil-cooled motor oil spraying disc - Google Patents

Abstract

The utility model relates to the technical field of motors, concretely relates to oil-cooled motor oil spout dish. Comprises an oil spraying disc body and an oil groove cover plate; the oil spout dish body includes: the oil guide structure comprises an oil injection disc oil inlet communicated with an end cover oil duct, an oil injection disc oil outlet communicated with a rotating shaft oil duct and an oil guide groove communicated with an oil inlet and an oil outlet of the oil injection disc, wherein the oil guide groove is tightly closed with an oil groove cover plate. The oil spraying disc of the utility model can select the adaptive oil spraying disc to convey the lubricating oil in the end cover oil duct to the rotating shaft oil duct according to the sizes of different shaft holes; meanwhile, the axial occupied space of the oil injection disc is small, and the installation requirement of the inner space of the motor is met.

Description

Oil-cooled motor oil spraying disc

Technical Field

The utility model relates to the technical field of motors, concretely relates to oil-cooled motor oil spout dish.

Background

The cooling forms of the common motors in the market at present comprise air cooling, water cooling and oil cooling, wherein the high-power motors mostly adopt the water cooling and the oil cooling, and the high-temperature parts of the motors are mainly concentrated at the end parts of stator windings, and fluid media cannot directly contact with high-temperature points, so that the motors cannot be directly cooled, and the heat dissipation effect is poor. In order to further improve the heat dissipation capacity of the motor, an oil injection cooling mode is developed vigorously, oil in a rotating shaft oil duct is sprayed to the end part of the stator winding under the action of the centrifugal force of the rotating shaft, and the oil flows through all or most of the end part of the winding under the action of gravity and pressure to take away heat.

In the correlation technique, the oil injection pipe is adopted to directly inject oil to the rotating shaft oil passage, and because corresponding parts are lacked to carry out tight connection of pipelines, the oil injection pipe needs to be tightly matched with an oil inlet of the rotating shaft oil passage, so that the size selection limitation of the oil injection pipe and the rotating shaft oil passage is large, and particularly when the oil injection pipe and the end cover are integrally formed, the rotating shaft oil passage is difficult to be matched with the oil injection pipe with a proper size, and the diversified selection in the design of the motor oil passage is not facilitated. Therefore, a highly adaptable oil pan with a small axial space occupation is urgently needed as a joint.

Disclosure of Invention

In order to solve the above problems, an object of the present invention is to provide an oil spraying pan, which can select an adaptive oil spraying pan to deliver the lubricating oil in the end cover oil duct to the rotating shaft oil duct according to the sizes of different shaft holes; meanwhile, the oil injection disc axially occupies small space, and meets the installation requirement of the internal space of the motor; the second purpose is to provide a motor with the oil spraying disc structure.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

an oil-cooled motor oil spray tray comprises an oil spray tray body and an oil groove cover plate;

the oil spout dish body includes: the oil guide structure comprises an oil injection disc oil inlet communicated with an end cover oil duct, an oil injection disc oil outlet communicated with a rotating shaft oil duct and an oil guide groove communicated with an oil inlet and an oil outlet of the oil injection disc, wherein the oil guide groove is tightly closed with an oil groove cover plate.

Furthermore, a step surface is arranged in the oil guide groove along the circumferential direction, and the oil groove cover plate is embedded in the step surface and is tightly fit through welding.

Furthermore, the outer peripheral wall of the oil inlet end of the oil spraying disc is provided with an annular boss.

Further, a first annular reinforcing rib is arranged on the outer edge of the oil injection disc body.

Furthermore, a second annular reinforcing rib is arranged on the back of the oil spraying disc body, and the first annular reinforcing rib and the second annular reinforcing rib are coaxially arranged.

An oil-cooled motor comprises the oil spraying disc.

The utility model provides a one or more technical scheme has following technological effect or advantage at least:

according to the oil spraying disc disclosed by the embodiment of the application, oil can be sprayed by selecting the adaptive oil spraying disc to form a certain pressure according to the size difference of the shaft hole, so that lubricating oil can be uniformly and stably output; in addition, the oil injection disc is in a disc shape, so that the oil injection disc occupies a small axial space and is beneficial to the miniaturization trend of a motor; in addition, the oil spout dish can also bear great oil pressure, and the structure is firm and connect closely.

Drawings

Fig. 1 is a schematic structural diagram of a motor according to an embodiment of the present application;

FIG. 2 is a schematic structural diagram of a housing and a housing oil passage according to an embodiment of the present disclosure;

FIG. 3 is a schematic view of an internal oil passage structure of a motor according to an embodiment of the present disclosure;

FIG. 4 is a cross-sectional view of an electric machine according to an embodiment of the present application;

FIG. 5 is a schematic structural diagram of an oil pan according to an embodiment of the present application;

FIG. 6 is a schematic structural view of the front side of the oil spout tray of the present invention;

FIG. 7 is a schematic view of the back side of the oil spout tray of the present invention;

FIG. 8 is a cross-sectional view of the oil spout tray of the present invention;

FIG. 9 is a schematic structural diagram of a rear end cap and its guide flow channels in accordance with an embodiment of the present application;

FIG. 10 is a schematic structural diagram of a housing and a cooling flow passage thereof according to an embodiment of the present application;

fig. 11 is a schematic structural diagram of a housing according to an embodiment of the present application.

Detailed Description

In order to clearly understand the technical features, objects, and effects of the present invention, the following detailed description of the embodiments of the present invention is made with reference to the accompanying drawings.

It should be noted that the terms "first" and "second" are used herein for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.

When an element is referred to as being "secured to," "mounted 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.

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 invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

The oil-cooled motor of the embodiment of the application is preferably a new energy direct-drive motor, so that the motor is necessary to be integrated with an oil-cooled circulation system and is generally integrated in a transmission system of a new energy automobile. The motor comprises a housing including a case body 10; a stator assembly fixed within the casing body 10, the stator assembly including stator windings; a rotor assembly rotatably disposed within the stator assembly; a rotating shaft 90 to which the rotor assembly is connected; the front end cover and the rear end cover 30 are connected to two ends of the housing body 10, and the front end cover and the rear end cover support the rotating shaft 90 through bearings.

Referring to fig. 1 to 4, the oil cooling circulation system is integrated with an oil storage cavity 20, an oil pump 60, a cooling device 70, an oil injection member, a housing oil passage formed in the housing, and an end cover oil passage 31 formed in the end cover. It should be appreciated by those skilled in the art that the oil cooling circulation system preferably selects lubricating oil to cool and simultaneously achieve the function of lubricating the components of the motor.

Specifically, referring to fig. 5, the oil storage cavity 20 is formed at the bottom of the housing, located at one side of the housing body 10, and configured as a cavity defined between the housing and an oil pan 40 installed at the bottom of the housing. The bottom of the oil pan 40 is provided with an oil drain plug 41 and is configured with a magnet, including but not limited to magnetic substances such as a magnet, and the like, and the magnet is used for adsorbing iron impurities in the lubricating oil, so that the recycling rate of the lubricating oil is effectively improved. In order to enhance the strength of the casing and reduce the deformation of the casing, a plurality of reinforcing ribs 25 are further arranged in the oil storage cavity 20.

The oil pump 60 is arranged in the oil pump cavity 24 formed in the oil storage cavity 20, an oil inlet of the oil pump 60 is communicated with the suction filter 50 through the first oil passage 21, the suction filter 50 is fixedly arranged in the oil storage cavity 20, an oil suction port 26 is arranged on one side of the suction filter 50, and a filter screen is arranged for filtering lubricating oil entering the oil pump 60, so that the safe and effective operation of the motor is guaranteed; the other side is the installation face fixed with the casing, and adopts the sealing washer to seal, reduces the oil leak risk. In another embodiment, the oil inlet of the oil pump 60 directly extends into the oil or directly communicates with the oil through the first oil passage 21.

Preferably, a first oil outlet is formed in the peripheral wall of the oil pump 60, which is close to the oil inlet end, the oil pump oil outlet is a second oil outlet, a second oil passage for communicating the first oil inlet with the second oil inlet is formed between the oil pump shell and the oil pump cavity 24, and the second oil passage is arranged around the oil pump shell, so that in the running process of the motor, flowing lubricating oil can continuously cool the oil pump, the temperature rise of the oil pump is reduced, and the working efficiency of the oil pump 60 is effectively improved. The oil pump 60 is correspondingly communicated to an oil inlet of the cooling device 70 through a third oil passage, which includes an oil passage a22 and an oil passage B23 that are perpendicular to each other and are communicated end to end.

The shell oil duct comprises the first oil duct 21, the second oil duct and the third oil duct, and it should be noted that the shell oil duct may be a pipeline passage, preferably a passage reserved on the shell, and the oil ducts are integrated in the shell, so that the arrangement of the communicated devices is compact, the risk of oil leakage is not easy to occur, and the arrangement requirement of the inner space and the outer space of the motor is better met.

The cooling device 70 is installed on the outer side of the rear end cover 30, the oil injection piece is installed on the inner side of the rear end cover 30, and the oil outlet of the cooling device is communicated to the oil inlet of the oil injection piece through an end cover oil duct 31. The end cover oil passage 31 can be a pipeline passage and a passage reserved on the shell, and also has the advantages of simple structure, convenience in installation, difficulty in oil leakage and compact layout of an oil injection piece and a cooling device.

Specifically, referring to fig. 6 to 8, the oil injection member is configured in a disc shape, and includes an oil injection disc body 80 and an oil groove cover plate 84, the oil injection disc body 80 has an oil injection disc oil inlet 82 communicated with the end cover oil passage 31, an oil injection disc oil outlet 81 communicated with the rotating shaft oil passage, and an oil guide groove 83 communicated with the oil injection disc oil inlet and outlet, and the oil guide groove 83 and the oil groove cover plate 84 are tightly sealed to form a flow guide oil passage. Preferably, a step surface is arranged in the oil guide groove 83 along the circumferential direction, the oil groove cover plate 84 is embedded on the step surface, and the oil groove cover plate 84 is fixed and sealed through ultrasonic welding, so that the flow guide oil passage is stable in structure, can bear large oil pressure, and can continuously and stably convey oil to the oil outlet of the oil injection disc body. In order to improve the sealing property of the oil spraying disc and the end cover oil duct 31 in matched connection, the mode that a plurality of annular convex edges are arranged on the outer peripheral wall of the oil inlet 82 of the oil spraying disc in parallel is adopted, the oil spraying disc is in interference fit with the end cover oil duct 31, and the sealing property of the oil spraying disc is greatly improved. In addition, the outer edge of the oil spray tray body 80 is provided with a first annular reinforcing rib 85, and the back part of the oil spray tray body is coaxially provided with a second annular reinforcing rib 86, so that the integral rigidity of the oil spray tray is enhanced. When the installation of carrying out the oil spout dish, oil spout dish axial compress tightly in the oil spout dish seat that rear end cover 30 was seted up, and oil spout dish oil-out 81 stretches into the pivot oil duct with pivot tip interference fit, simultaneously, as the first annular strengthening rib 85 of installation fixed tang carries out radially spacingly, and supplementary with second annular strengthening rib 86 carries out the axial spacingly, and the device is firm, and the operation is convenient.

The embodiment of the utility model provides an oil spout spare for carry the lubricating oil in the end cover oil duct 31 to the pivot oil duct in, according to the difference of shaft hole size of a dimension, select the oil spout dish of adaptation to form certain pressure and carry out fluid injection, make lubricating oil can even stable output. The fuel injection piece of this embodiment has at least the following advantages: 1) all made of plastics (PA 66+30% PF), the part manufacturing cost is low, the quality is light, the reliability is excellent; 2) by adopting the disc-shaped structure, the axial occupied space is small, and the requirement of the internal arrangement space of the motor is met; 3) the assembly positioning adopts an interference fit mode, the axial compression is realized, no bolt is adopted, the assembly is simple, and the structure is compact.

The rotating shaft is internally constructed to be a rotating shaft oil duct for lubricating oil to flow, the rotating shaft oil duct is axially arranged, one end of the rotating shaft oil duct is communicated with an oil outlet of the oil injection disc, a plurality of oil injection holes 91 are formed in two ends of the rotating shaft oil duct corresponding to the end portion of the stator winding, preferably, the oil injection holes 91 are uniformly distributed to the circumferential direction of the rotating shaft 90, and the lubricating oil ejected from the oil injection holes 91 under the centrifugal force action of the rotating shaft 90 uniformly drops to the end portion of the stator winding in an umbrella shape. Under the dual action of gravity and pressure, the heat flows through all or most of the stator winding end parts and is taken away.

Referring to fig. 9, preferably, the front and rear end covers have a guide flow passage 33 for guiding the dropped oil into the bearing, and compared with a grease-lubricated bearing of a water-cooled motor, in this embodiment, the oil-cooled motor adopts an open oil-lubricated bearing, and the flowing lubricating oil can effectively reduce the temperature of the bearing during operation and provide continuous lubrication for the bearing, so that the operation condition of the bearing can be effectively improved, and the service life of the bearing can be prolonged.

And oil return holes 32 are formed in the bottoms of the front end cover and the rear end cover, and the oil return holes 32 are communicated with the oil storage cavity 20.

Referring to fig. 10, the oil-cooled motor of the embodiment of the present application further includes a water cooling circulation system, which specifically includes a water inlet 15 and a water outlet 12 formed on the outer peripheral wall of the housing body, and a cooling water channel 11 formed inside the housing and connected to the water inlet and the water outlet, where the cooling water channel 11 is an internal cavity formed by sand casting, and after the casting is completed, sand shaking cleaning is performed to form a complete closed water channel. The cooling water channel 11 is constructed in an axial rotating structure and is arranged to surround the shell body for a circle, so that the heat exchange efficiency is better. Of course, circumferential, spiral, and semi-spiral channel configurations may be used in other embodiments. The water inlet 15 is communicated with an external whole vehicle waterway, the water outlet 12 is communicated to the cooling device 70 through an external water pipe, and flows out of the water outlet 12 after passing through the multi-layer labyrinth in the cooling device 70. The cooling device 70 is provided with inlet and outlet parts corresponding to the oil cooling and water cooling circulation systems respectively, so that the utilization rate of cooling water is improved.

Referring to fig. 11, preferably, the water outlet 12, the oil outlet 13, and the oil return port 14 are all provided with a sealing groove on the surface of the casing body 10, and are sealed with the end cover by a sealing ring provided in a matching manner.

The shell of the embodiment of the application has at least the following advantages: 1) the aluminum alloy is formed by low-pressure casting, so that the strength of the shell is enhanced, the deformation of the shell is reduced, the process manufacturing difficulty is small, and the process forming is facilitated; 2) meanwhile, a water cooling and oil cooling mode is provided for the motor, so that the heat dissipation efficiency of the motor is effectively improved; 3) the integration level of the oil-cooled motor can be improved to a greater degree, the lightweight design of the whole machine is facilitated, and the structure is compact.

The cooling process of the motor is explained in detail below: the embodiment of the application adopts a water-cooling oil-filling cooling composite cooling mode, and the cooling water channel is integrated in the shell body to dissipate heat of the whole stator assembly; in order to improve the heat dissipation effect of the motor, an oil injection cooling mode is implemented for the stator winding end part with concentrated temperature rise, specifically, the oil pump pressurizes and sucks oil into an oil duct, the cooled oil is injected into a rotating shaft oil duct through an oil outlet of an oil injection part through a cooling device, when the motor runs, centrifugal force generated by rotation of a rotating shaft enables the oil to be injected to the stator winding end part in an umbrella shape along an oil injection hole, under the dual effects of pressure and gravity, the oil slides down along an end cover after flowing through all or most of windings and takes away heat, meanwhile, a part of the oil is drained into the bearing along a guide flow channel formed in the end cover, the temperature of the bearing can be effectively reduced, and continuous lubrication is provided for the. The oil liquid sliding down through the end cover flows back to the oil storage cavity through an oil return hole formed by the end cover and the shell in a penetrating way, so that a complete oil cooling circulation system is formed.

On the basis of keeping the original cooling water channel, the oil cooling motor disclosed by the embodiment of the application integrates an oil pan, a suction filter, an oil pump, a cooling device, an oil injection disc and oil channels in a shell and an end cover to form an oil cooling circulation system, so that the running temperature of the motor at high speed and high power can be effectively reduced and the service life of the motor can be prolonged compared with a single water cooling motor; meanwhile, the system is high in integration level and compact in structure, so that the motor can be reduced in size to a certain extent and designed in a light weight mode.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the concept of the present invention, several variations and modifications can be made, which are within the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims (6)

1. An oil-cooled motor oil spout disc is characterized by comprising an oil spout disc body (80) and an oil groove cover plate (84);

the oil spout pan body (80) includes: the oil guide structure comprises an oil injection disc oil inlet (82) communicated with an end cover oil duct (31), an oil injection disc oil outlet (81) communicated with a rotating shaft oil duct and an oil guide groove (83) communicated with an oil inlet and an oil outlet of the oil injection disc, wherein the oil guide groove (83) is tightly sealed with an oil groove cover plate (84).

2. The oil-cooled motor oil spout disc of claim 1, wherein a step surface is provided in the oil guide groove (83) along the circumferential direction, and the oil groove cover plate (84) is fitted on the step surface and is sealed by welding.

3. An oil-cooled motor oil spout pan as claimed in claim 1, wherein an annular projection is provided on the outer peripheral wall of the oil inlet port (82) end of the oil spout pan.

4. An oil-cooled motor oil spout as claimed in claim 1, wherein a first annular bead (85) is provided on an outer periphery of the oil spout body (80).

5. The oil-cooled motor oil spout as claimed in claim 4, wherein a second annular reinforcing rib (86) is provided on the back of the oil spout body (80), and the first annular reinforcing rib (85) is coaxially provided with the second annular reinforcing rib (86).

6. An oil-cooled motor comprising an oil pan as claimed in any one of claims 1 to 5.

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