CN214380519U

CN214380519U - Composite oil cooling motor

Info

Publication number: CN214380519U
Application number: CN202023245041.7U
Authority: CN
Inventors: 张胜川; 王学圣
Original assignee: Shun Drive Power Technology Nantong Co Ltd
Current assignee: Shun Drive Power Technology Nantong Co Ltd
Priority date: 2020-12-14
Filing date: 2020-12-29
Publication date: 2021-10-08
Anticipated expiration: 2030-12-29

Abstract

The utility model discloses a composite oil-cooled motor, which comprises a casing, a first end cover, a second end cover, a stator core, a first end winding, a second end winding, a rotating shaft and a rotor core, wherein the side wall of the casing is provided with a first oil inlet nozzle and a first oil outlet nozzle; the tail of the rotating shaft is provided with a shaft cooling hole along the axis of the rotating shaft, the second end cover is provided with a second oil inlet nozzle communicated with the shaft cooling hole, the rotating shaft is provided with a plurality of shaft cooling branch holes, and the shaft cooling branch holes are communicated with the shaft cooling hole and the inner cavity of the shell. The utility model improves the whole cooling efficiency by directly cooling the heat source; meanwhile, the rotor part inside the rotor can be cooled, the permanent magnet motor can be avoided, and the demagnetization problem of the permanent magnet steel caused by overhigh temperature of the rotor can be solved, and meanwhile, the material utilization rate of the permanent magnet steel can be improved. Furthermore, the utility model discloses can also cool off simultaneously, lubricated bearing, reduce the interior outer lane difference in temperature of bearing, improve bearing service life and reliability.

Description

Composite oil cooling motor

Technical Field

The utility model belongs to the field of machinery, concretely relates to oil-cooled motor especially relates to a stator end winding spray cooling, rotor get rid of compound oil-cooled motor of oil.

Background

The requirements of new energy automobiles and other applications on the power density and the torque density of the motor are higher and higher, and especially along with the trend of integration, higher requirements are provided for the heat dissipation capacity of a motor system. The shell water cooling technology is a mainstream heat dissipation mode at present, but the heat source cannot be directly cooled, the heat of the winding needs to be transmitted to the shell through the slot insulation and the stator core and then is taken away by cooling water, the heat transmission path is long, the heat dissipation efficiency is low, and the fit tolerance among all the components influences the size of the heat resistance of the transmission path. Meanwhile, air is arranged around the winding end part of the stator, the heat conductivity coefficient of the air is very low and is only 0.0246W/m/K, the heat resistance of the winding end part which transfers heat to the shell through the air is quite large, and most of heat can only be transferred to the shell through the stator iron core. This results in heat build-up at the winding ends, creating hot spots.

The high heat of the motor directly affects the service life and reliability of the motor, and particularly for the permanent magnet motor, the high temperature increases the demagnetization risk of the permanent magnet steel and can reduce the performance of the permanent magnet steel.

In order to reduce the heat resistance of the end winding of the motor in heat dissipation, a method for pouring an organic insulating material into the end of the winding is adopted, the insulating material adopts a specially designed high-heat-conduction material, the heat conduction coefficient can reach 1-3W/m/K, a new heat dissipation path is formed through the potting material, the heat of the end winding directly reaches the shell and the end cover through the path, and the heat dissipation efficiency is greatly improved.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide another kind solves the compound oil cooling motor of above-mentioned technical problem.

In order to achieve the above object, the utility model provides a following technical scheme:

the utility model provides a compound oil-cooled motor, includes hollow casing, seals the first end cover and the second end cover of casing, still including setting up stator core, first end winding, second end winding, pivot and rotor core in the casing, the pivot rotationally sets up through first bearing and second bearing in the casing, the front portion of pivot is stretched out outside the first end cover, the afterbody quilt of pivot the second end cover seals in the casing, its characterized in that: the side wall of the shell is provided with at least one first oil inlet nozzle communicated with the inner cavity of the shell and at least one oil outlet nozzle communicated with the inner cavity of the shell; the tail of the rotating shaft is provided with a shaft cooling hole along the axis of the rotating shaft, the second end cover is provided with a second oil inlet nozzle communicated with the shaft cooling hole, the rotating shaft is provided with a plurality of shaft cooling branch holes, and the shaft cooling branch holes are communicated with the shaft cooling hole and the inner cavity of the shell.

Preferably, the rotating shaft is provided with a plurality of shaft cooling branch holes facing the first bearing and the second bearing in an inclined manner.

Preferably, the first bearing and the second bearing are respectively provided with a first oil seal and a second oil seal at the outer sides thereof for sealing the first bearing and the second bearing.

Preferably, a disc-shaped rotor support is arranged on the rotating shaft, a plurality of penetrating support cooling holes are formed in the rotor support along the diameter direction of the rotor support, and iron core cooling holes communicated with the support cooling holes are formed in the rotating shaft.

Preferably, a plurality of spokes are arranged on the rotor support, and each spoke is provided with the support cooling hole.

Preferably, a rotary transformer support is arranged on the rotor support, an annular rotary transformer rotor is arranged on the rotary transformer support, and a rotary transformer stator is arranged on the second end cover.

Preferably, an arc-shaped conduction cavity is formed in the inner wall of the machine shell, and the first oil inlet nozzle is communicated with the conduction cavity; and a plurality of oil injection ports are arranged on the inner side of the conducting cavity corresponding to the first end winding and the second end winding.

Preferably, the inner side of the conduction cavity is welded with a first arc-shaped oil spraying plate and a second arc-shaped oil spraying plate, and the oil injection port is formed in the first oil spraying plate and the second oil spraying plate.

The utility model has the advantages that: the easy temperature that appears of motor end winding piles up, forms local focus, the utility model discloses a motor just carries out special pipeline design through the casing, introduces the fuel injection ring with the coolant oil, directly sprays stator winding tip through the fuel injection crown plate, and then directly cools off the heat source and improves holistic cooling efficiency. The utility model can also cool the inner rotor part through another oil circuit, and can avoid the demagnetization problem of the permanent magnet steel caused by the overhigh temperature of the rotor of the permanent magnet motor; meanwhile, the material utilization rate of the permanent magnet steel can be improved; in addition, the bearing is cooled and lubricated simultaneously, the temperature difference between the inner ring and the outer ring of the bearing is reduced, and the service life and the reliability of the bearing are improved. The utility model discloses a casing and oil spout ring plate simple structure, manufacturing is convenient, and is with low costs, can realize the direct cooling of stator winding tip, and the cooling effect is good. The rotor cooling adopts the hollow shaft to synchronously realize the cooling of rotor magnetic steel and a bearing by utilizing the mode of centrifugal oil throwing of the rotating speed, the cooling effect is good, and the reliability of the motor is improved. The structure of the motor is more compact, the volume and the weight are correspondingly reduced, and the power density is further improved.

Drawings

Fig. 1 is a schematic sectional structure view of the composite oil-cooled motor of the present invention;

FIG. 2 is a schematic perspective view of the housing;

FIG. 3 is a cross-sectional view of the shaft and rotor support portion;

FIG. 4 is a perspective view of the shaft;

FIG. 5 is a perspective view of a rotor support;

fig. 6 is a perspective view of the rotor core.

Detailed Description

The technical solution of the present patent will be described in further detail with reference to the following embodiments.

As shown in fig. 1 to 6, the present invention provides a composite oil-cooled motor, which is formed by a first end cap 10, a second end cap 12 and a housing 14 through bolt locking connection. The stator core 16, the first end winding 18, the second end winding 20, the rotating shaft 22, the rotor core 24, and the like are provided in the housing 14. The rotating shaft 22 is rotatably disposed in the casing 14 through a first bearing 26 and a second bearing 28, a front portion of the rotating shaft 22 extends out of the first end cover 10, and a rear portion of the rotating shaft 22 is enclosed in the casing 14 by the second end cover 12; first and

second oil seals

30 and 32 are provided outside the first and

second bearings

26 and 28, respectively, to enclose the first and

second bearings

26 and 28. The above structure is a common structure of the current motor, and the position, connection relationship and respective functions thereof are well known in the art. The first and

second end windings

18 and 20, and the first and

second bearings

26 and 28 are hot spots with large heat generation.

An arc-shaped conducting cavity 34 is formed on the inner wall of the housing 14, and the conducting cavity 34 is a groove which is concave towards the outside. A first oil inlet nozzle 36 is arranged on the outer wall of the machine shell 14, the first oil inlet nozzle 36 is communicated with the conducting cavity 34, and the first oil inlet nozzle 36 is located at the top of the machine shell 14. The inside welding of cavity 34 leads to curved first oil spout board 38 and the second oil spout board 40 to seal cavity 34 is inboard, is provided with a plurality of nozzle 42 on first oil spout board 38 and the second oil spout board 40. The first oil jet plate 38 and the second oil jet plate 40 are respectively located at positions corresponding to the first end winding 18 and the second end winding 20, so that the cooling oil fed through the first oil inlet nozzle 36 passes through the oil jet 42 and is directly sprayed onto the first end winding 18 and the second end winding 20 to directly cool the first end winding 18 and the second end winding 20.

Two oil outlets 44 are arranged on the side wall of the casing 14, and the oil outlets 44 are arranged at the bottom of the casing 14 and communicated with the inner cavity of the casing 14; an oil path with a long distance is formed between the oil outlet nozzle 44 and the first oil inlet nozzle 36, and cooling oil enters from the first oil inlet nozzle 36, cools the structure inside the casing 14, collects from the oil collecting groove 43 below the casing 14, and is discharged from the oil outlet nozzle 44. This is the first cooling oil path, which can cool the windings, and also can remove heat from other components inside the casing 14 during the flowing of the cooling oil.

To the bearing of another focus, the utility model discloses still design the second oil circuit:

shaft cooling hole 46 is seted up along its axis in the afterbody of pivot 22, sets up the second oil inlet nozzle 48 of a intercommunication shaft cooling hole 46 on the second end cover 12, and the slope sets up a plurality of axle cooling branch hole 50 in pivot 22, and axle cooling branch hole 50 intercommunication shaft cooling hole 46 and casing 14 inner chamber, and axle cooling branch hole 50 revolves the circumference symmetry setting of pivot 22.

The rotary shaft 22 is provided with a disc-shaped rotor support 52, and a plurality of spokes 54 are arranged on the rotor support 52 along the diameter direction thereof. Each spoke 54 is provided with a support cooling hole 56 which penetrates through the spoke; the rotating shaft 22 is provided with an iron core cooling hole 58 corresponding to the bracket cooling hole 56, and the iron core cooling hole 58 is communicated with the shaft cooling hole 46.

The rotating shaft 22 is a hollow shaft, and the rotor magnetic steel and the bearing are synchronously cooled by using a rotating speed centrifugal oil throwing mode, so that the cooling effect is good, and the reliability of the motor is improved.

Further, the rotary transformer comprises a rotary transformer for detecting a motor position signal, wherein the rotary transformer comprises a rotary transformer support 60 arranged on the rotor support 52, an annular rotary transformer rotor 62 is arranged on the rotary transformer support 60, and a rotary transformer stator 64 is arranged on the second end cover 12.

It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims

1. The utility model provides a compound oil-cooled motor, includes hollow casing, seals the first end cover and the second end cover of casing, still including setting up stator core, first end winding, second end winding, pivot and rotor core in the casing, the pivot rotationally sets up through first bearing and second bearing in the casing, the front portion of pivot is stretched out outside the first end cover, the afterbody quilt of pivot the second end cover seals in the casing, its characterized in that: the side wall of the shell is provided with at least one first oil inlet nozzle communicated with the inner cavity of the shell and at least one oil outlet nozzle communicated with the inner cavity of the shell; the tail of the rotating shaft is provided with a shaft cooling hole along the axis of the rotating shaft, the second end cover is provided with a second oil inlet nozzle communicated with the shaft cooling hole, the rotating shaft is provided with a plurality of shaft cooling branch holes, and the shaft cooling branch holes are communicated with the shaft cooling hole and the inner cavity of the shell.

2. The compound oil-cooled motor of claim 1, wherein: the rotating shaft is provided with a plurality of shaft cooling branch holes facing the first bearing and the second bearing in an inclined mode.

3. The compound oil-cooled motor of claim 2, wherein: and a first oil seal and a second oil seal for sealing the first bearing and the second bearing are respectively arranged at the outer sides of the first bearing and the second bearing.

4. The compound oil-cooled motor of claim 1, wherein: the rotary shaft is provided with a disc-shaped rotor support, a plurality of penetrating support cooling holes are formed in the rotor support along the diameter direction of the rotor support, and iron core cooling holes communicated with the support cooling holes are formed in the rotary shaft.

5. The compound oil-cooled motor of claim 4, wherein: the rotor support is provided with a plurality of spokes, and each spoke is provided with the support cooling hole.

6. The compound oil-cooled motor of claim 5, wherein: the rotor support is provided with a rotary transformer support, the rotary transformer support is provided with an annular rotary transformer rotor, and the second end cover is provided with a rotary transformer stator.

7. The compound oil-cooled motor of claim 1, wherein: an arc-shaped conduction cavity is formed in the inner wall of the shell, and the first oil inlet nozzle is communicated with the conduction cavity; and a plurality of oil injection ports are arranged on the inner side of the conducting cavity corresponding to the first end winding and the second end winding.

8. The compound oil-cooled motor of claim 7, wherein: the inner side of the conduction cavity is welded with a first arc-shaped oil spraying plate and a second arc-shaped oil spraying plate, and the oil injection port is formed in the first oil spraying plate and the second oil spraying plate.