CN202818005U - Liquid cooling motor - Google Patents
Liquid cooling motor Download PDFInfo
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- CN202818005U CN202818005U CN 201220432542 CN201220432542U CN202818005U CN 202818005 U CN202818005 U CN 202818005U CN 201220432542 CN201220432542 CN 201220432542 CN 201220432542 U CN201220432542 U CN 201220432542U CN 202818005 U CN202818005 U CN 202818005U
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- liquid cooling
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Abstract
The utility model relates to a liquid cooling motor. The housing of the motor is provided with a liquid cooling circuit; the liquid cooling circuit comprises a main body cooling circuit coiling along the motor main body and terminal circuits respectively arranged at two shaft end caps of the motor main body; the main body cooling circuit is concentrically wrapped around the cylindrical circumference of the motor main body to form a cylindrical helix, thereby the thermoplastic deformation or the linear expansion amplitude of the housing of the motor at the same radial direction is basically the same, out-of-roundness of the inner circle of stator of the motor iron core is prevented, and the motor is prevented from vibration; the arrangement of smooth boss on the inner wall of the motor housing, and the distance between a coil and the liquid cooling channel with a high heat conduction coefficient is reduced; epoxy clay is filled in the gaps formed among the inner wall of the housing, the coil and the stator, and among the boss, the coil and the stator, a sealing and fixing effect is provided, and simultaneously, heat is conducted; and the heat transfer property of the epoxy clay is better than air, thereby the heat in the terminal of the coil of the motor is rapidly conducted out of the housing for heat radiation, and the heatproof performance of the motor is effectively raised.
Description
Technical field
The utility model relates to machine field, is specifically related to a kind of cooling structure of motor, can be applicable to direct current machine, alternating current machine and three phase electric machine that every profession and trade is used.
Background technology
Motor has application in a lot of technical fields, no matter is AC and DC motor or three phase electric machine, in the process of running, all more or less can produce waste heat, and the generation of waste heat affects to some extent on the performance of motor, and temperature more high efficiency is lower; Yet, the temperature difference also is very important, particularly when electric machine casing neither the temperature difference of homonymy reach certain value, because the difference of temperature so that the expansion of the line of electric machine casing material is inconsistent on same circumference, causes electric machine iron core stator inner circle to lose circle, air gap between electric machine rotor is uneven in circle distribution, so that the rotor in the rotation is subject to the radial load of an alternation, causes the vibration aggravation of motor, and affect efficient and the life-span of motor.Particularly for the high-speed electric expreess locomotive of having relatively high expectations, large-size machine, high-precision motor, motor can't be worked.
The motor feels hot and temperature difference problem in the at present comparatively simple water-cooled machine solution of many employing structures.In the design in water route, adopt cooling chamber or coil pipe as the water route element more.For example Chinese publication application 02229237.3 " Water cooling high-temp. resistant motor ", adopt cooling chamber loop simple in structure to come cooling motor, cooling chamber on the motor main housing and motor housing structure are integrated, water-cooled housing adopts extraordinary seamless steel pipe, and housing also is the part in water route; So that motor overall compact, simple in structure, but its impact on the motor operation can not be ignored.Its subject matter is because the cross section of the water inlet in water route and delivery port only accounts for the seldom part in cooling chamber cross section, the water inlet of cooling chamber adds water and vertically by the nearest road order water outlet of water channel, water velocity in the cooling chamber is made a world of difference, will form the temperature difference between the fast side of the side that current are slow and current, when temperature difference reaches certain value, because the difference of temperature, so that the line of electric machine casing material expands inconsistent on same circumference, will cause electric machine iron core stator inner circle to lose circle, air gap between electric machine rotor also can skewness at circumference, so that the rotor in the rotation is subject to the radial load of an alternation, also can cause the vibration aggravation of motor, and affect efficient and the life-span of motor.Particularly for the high-speed electric expreess locomotive of having relatively high expectations, this water route is arranged in the temperature difference also can make motor work when serious.
In the water route, adopt coil design just can avoid because of the inconsistent temperature difference that produces of cooling chamber flow velocity; But adopt coil pipe as the water route element multiple winding method to be arranged.Wherein there are many employings axially to coil system, for example Chinese publication application CN101268599A " motor " adopts axial cooling circuit simple in structure to come cooling motor, cooling water pipe on the motor main housing distributes along the axis direction of motor, the one or both ends employing of motor and motor shaft circumferentially carry out the cooling water distribution to perpendicular direction around distributing pipe outside motor, play mainly around distributing pipe that current distribute and the backflow effect, rise leading cooling effect or along motor shaft to being distributed on the shell or being embedded in many vertical cooling water pipes of enclosure.The axial distribution of this device can not be ignored the impact of motor operation.Its subject matter is because the water inlet in water route and water outlet are the differences on the end face circumference distributing pipe vertical with axis, the water inlet of distributing pipe is along adding water and according to the order of sequence water outlet for according to the order of sequence each axial cooling water pipe clockwise or counterclockwise, between the side of intaking first and rear water inlet one side and first water outlet one side and rear water outlet one side all can form the temperature difference, when temperature difference reaches certain value, so that because the difference of temperature, the line of electric machine casing material expands inconsistent on same circumference, also can cause electric machine iron core stator inner circle to lose circle, air gap between electric machine rotor is uneven in circle distribution, so that the rotor in the rotation is subject to the radial load of an alternation, cause the vibration aggravation of motor, and affect efficient and the life-span of motor.Particularly for the high-speed electric expreess locomotive of having relatively high expectations, this water route is arranged in the temperature difference can't work motor when serious.
Moreover the heating of motor line loss also is its main thermal source, and it is the first cause of its damage that motor coil burns out.Coil is disposed axially in motor internal, and its wire diameter and the electric current that passes through are consistent, and the caloric value of its unit length also should be consistent; But because coil residing position in motor is different, the conductive coefficient of its peripheral material is different, and causes the temperature rise of coil diverse location also different; As: stretch out and be in airborne coil and the coil of bank within stator core outside the stator core, because the conductive coefficient of air and iron core is different, and cause the temperature of coil diverse location different; The coil heat of core interior fast conduction dispels the heat to iron core; And the coil of iron core outside is in air, and the coil inside heat should not dispel the heat because the temperature conduction of air is relatively slow.When the coil inside caloric value greater than the heat of peripheral material to exterior conductive, the temperature rise of coil inside breaks through the resistance to extreme temperature of coil covering, will the generation accident.Therefore, the part that the coil periphery conductive coefficient is the poorest namely is the weak link of motor heatproof.So it is the poorest that coil periphery substitutes conductive coefficient by the high material of conductive coefficient, or reducing the distance of the high material of coil and conductive coefficient, all is the effective measures of raising motor heatproof.
The utility model content
The technical problems to be solved in the utility model is, overcome the defective of above-mentioned cooling chamber and coiled water-cooled machine, a kind of fluid-cooled electrical machine with liquid cooling loop is provided, can make electric machine casing in same footpath upwards balanced cooling prevent that electric machine iron core stator inner circle from losing circle, improving the motor temperature resistant capability, guarantee that motor runs well and prolongs motor useful life.
For solving the problems of the technologies described above, the technical solution adopted in the utility model is:
A kind of fluid-cooled electrical machine, electric machine casing is the cylindrical shell that iron casting forms, and it is characterized in that: housing wall is provided with the liquid cooling passage, and the liquid cooling passage around the circumferential form concentric spirals of electric machine main shaft around forming circular helix; The inwall of cylindrical shell one end is provided with the round and smooth boss of integrally casting, and stator next-door neighbour housing is placed, and boss is vertically between the stator and coil of this end; The liquid cooling passage from import department's continuous helical of cylindrical shell one end around, and pass the exit that described boss arrives the cylindrical shell other end and form the loop; Two bearings end cap at electric machine main shaft is respectively equipped with the termination liquid cooling loop, and circumferential disc is around forming circular liquid cooling ring respectively in each bearing chamber outer for the termination liquid cooling loop, and each liquid cooling ring all consists of independent loop; Described liquid cooling passage and termination liquid cooling loop are the liquid cooling coil pipe coiling that wrought iron makes and form, and form the heat conduction with cylindrical shell or bearing (ball) cover and be connected; The gap that surrounds between inner walls and coil and stator and boss and or inwall and coil and stator between the gap all fill epoxy mortar.
By technique scheme, the inner and outer wall of described liquid cooling channel outer wall and same radial motor cylindrical shell all forms the interval.
By technique scheme, according to motor shaft to the temperature distribution situation, the circular helix of described liquid cooling passage is along the even interval of electrical axis direction or class interval, and when the class interval same group liquid cooling ring mutually be close to or the gap that exists less than the interval between on the same group not.
By technique scheme, the import of liquid cooling passage and outlet reverse extending line intersect at the central axis of motor cylindrical shell.
By technique scheme, the port of export of termination liquid cooling loop and entrance point stretch out from the circular liquid cooling ring at place, and external part reverse extending line intersects at the circular air ring center of circle; Perhaps the port of export of termination liquid cooling loop and entrance point stretch out from the circular air ring cocurrent and parallel at place; The termination liquid cooling loop structure of different axle heads is identical or different.
By technique scheme, bearing (ball) cover is the round platform consistent with the cylindrical shell diameter, and the port of export and the entrance point of termination liquid cooling loop stretch out from round platform; Perhaps bearing (ball) cover be diameter greater than the boss of cylindrical shell diameter, the port of export and the entrance point of termination liquid cooling loop stretch out from boss; Bearing (ball) cover structure and the termination liquid cooling loop structure of different axle heads are identical or different.
By technique scheme, the outlet of the outlet of liquid cooling passage and termination liquid cooling loop is not at same quadrant.
With respect to prior art, the beneficial effects of the utility model are:
The first, by cylindrical screw line style cooling coil is set at cylindrical shell, samely go up radially that the temperature of cooling water pipe reaches unanimity substantially on the electric machine casing, the excessive cold and hot temperature difference can not appear, thereby, can guarantee that the same thermoplastic of radially going up electric machine casing is out of shape or the line expansion amplitude is basic identical.
The second, housing adopts cast iron, and the liquid cooling coil pipe adopts and is easy to weld and wrought iron or pure iron that thermoplasticity is good.Pure iron or wrought iron fusing point are up to 1534 ℃, and thermal endurance and thermoplasticity are all relatively good, and welding can not stay leak source and cause interior leakage easily, and cost is low; And cast iron particularly the fusing point of casting pig be 1145～1250 ℃, in the easy moulding of when casting and can not affect the performance of wrought iron liquid cooling coil pipe, can effectively guarantee the intensity of housing and can guarantee that the liquid cooling coil pipe time does not deform in casting, can guarantee that thermoplastic distortion or line expansion amplitude that same footpath makes progress are basic identical; Because the fusing point of steel pipe is about 1300 ℃, approach with cast iron, easily molten bad liquid cooling coil pipe during the casting electric machine casing, rate of finished products is low, thereby this programme with respect to the coil pipe that adopts steel pipe or stainless steel tube as the liquid cooling coil pipe, rate of finished products is guaranteed and performance is good, cost is low.
Three, the electric machine casing inwall arranges round and smooth boss stator is fixed, and further setting fixing jackscrew radially also on the outer wall fixedly secures stator in housing, avoids motor oscillating; Simultaneously, be equipped with the liquid cooling passage in the boss, reduce the distance of coil and conductive coefficient highland liquid cooling passage, for boss and the peripheral cooling of locating very big help is arranged also; At last, the gap that surrounds between inner walls and coil and stator and boss and or inwall and coil and stator between the gap all fill epoxy mortar, when sealing is fixing, can also conduct heat, because the heat transfer property of epoxy mortar is better than air, thereby motor coil termination internal heat can be conducted housing fast and dispel the heat; Thus, can Effective Raise motor heatproof.
Four, the import of liquid cooling passage and outlet reverse extending line intersect at the central axis of motor cylindrical shell, and the port of export of termination liquid cooling loop and entrance point also carry out the angle setting, so that Inlet and outlet water is more smooth, promote energetically cooling rate and cooling effect.
The fluid-cooled electrical machine that consists of thus, good cooling results and can not cause electric machine iron core stator inner circle to lose circle has been avoided the vibration of motor, has guaranteed efficient and the life-span of motor.Particularly for the motor of higher rotation speed, for the cooling circuit of its water-cooled or similar mediums provides a practical way.
Description of drawings:
Fig. 1: the fluid-cooled electrical machine structural representation of an embodiment of the utility model (middle casing partly is cutaway view).
The liquid cooling passage import and export mix schematic diagram (the A-A cut-away view of Fig. 1) of Fig. 2: Fig. 1.
The termination loop structure schematic diagram of Fig. 3: Fig. 1 (the M-M cut-away view of Fig. 1).
Embodiment
The utility model is described in further detail below in conjunction with embodiment and accompanying drawing, but do not limit the utility model.
Shown in Fig. 1-2, a kind of fluid-cooled electrical machine, electric machine casing 2 is the cylindrical shell that iron casting forms, and it is characterized in that: housing 2 walls are provided with liquid cooling passage 1, and liquid cooling passage 1 around electric machine main shaft 8 circumferential form concentric spirals around forming circular helix; The inwall of cylindrical shell 2 one ends is provided with the round and smooth boss 5 of integrally casting, and stator 7 next-door neighbour's housings 2 are placed, and boss 5 is vertically between the stator 7 and coil 9 of this end; The liquid cooling passage is put the 11 liquid cooling tube channel that arrive another sidewall from import 1.2 spiral surroundings of cylindrical shell 2 one ends from the pipe of the liquid cooling passage of import and is put 12 places, then in turn spiral up coil arrive liquid cooling tube channel point 13,14 ... .., and pass the pipe point of described boss 5, outlet 1.1 places that arrive the cylindrical shell other end form the loop; Two bearings end cap 3 and 4 at electric machine main shaft 8 is respectively equipped with the termination liquid cooling loop, and circumferential disc is around forming circular liquid cooling ring respectively in each bearing chamber outer for the termination liquid cooling loop, and each liquid cooling ring all consists of independent loop; Described liquid cooling passage and loop, termination are the liquid cooling coil pipe coiling that wrought iron makes and form, and form the heat conduction and be connected with being connected with cylindrical shell 2 or bearing (ball) cover 3; 7 gaps that surround of housing 2 inwalls and coil 9 and stator and boss 5 and or the gap of 7 of inwall and coil 9 and stators all pour into a mould and fill epoxy mortar 6; Also be provided with the jackscrew 10 that passes housing and holding stator in the yearning of footpath on housing 2 outer walls.
For convenient lifting, on the jackscrew 10 suspension ring can also be set.
Liquid cooling passage 1 is connected with the termination liquid cooling loop to be embedded in the electric machine casing 2 and with the heat conducting mode of electric machine casing and is connected; The housing that described electric machine casing 2 forms for iron casting, liquid cooling passage 1 and termination liquid cooling loop are the liquid cooling coil pipe that wrought iron is made.
In order to guarantee the intensity of electric machine casing, the wall thickness of the caliber of described liquid cooling passage 1 and cylindrical shell 2 forms certain proportion, and the inwall certain intervals of the caliber inner distance cylindrical shell 2 of assurance liquid cooling passage 1, the outer lateral extent cylindrical shell 2 outer wall certain intervals of caliber, guarantee the quick water-cooled effect of liquid cooling passage 1, also will guarantee the intensity of electric machine casing simultaneously.
More excellent, according to motor shaft to the temperature distribution situation, the circular helix of described liquid cooling passage 1 is along the even interval of electrical axis direction or class interval (as shown in Figure 1), and when the class interval same group air ring mutually be close to or the gap that exists less than the interval between on the same group not.
As further optimization embodiment, as shown in Figure 2, the import 1.2 of liquid cooling passage 1 and outlet 1.1 external part reverse extending lines intersect at the central axis of motor cylindrical shell, so that the smooth and easy inflow of cooling water and outflow, and the convenient import and export of making and liquid cooling loop being installed.
As further optimization embodiment, for ease of the smooth and easy inflow of cooling water and outflow; The port of export of termination liquid cooling loop and entrance point also can have following several form: as shown in Figure 3, the port of export 3.1 of termination liquid cooling loop and entrance point 3.2 stretch out from the circular air ring at place, and external part reverse extending line intersects at the circular air ring center of circle; Perhaps the port of export 3.1 of termination liquid cooling loop and entrance point 3.2 stretch out from the circular air ring cocurrent and parallel at place; The termination liquid cooling loop structure of different axle heads can be identical or different.
As further optimization embodiment, bearing (ball) cover 3 or 4 is the round platform consistent with cylindrical shell 2 place body diameters, and the port of export 3.1 of termination liquid cooling loop and entrance point 3.2 stretch out from round platform; Perhaps bearing (ball) cover 3 or 4 be diameter greater than the boss of cylindrical shell 2 diameters, the port of export 3.1 of termination liquid cooling loop and entrance point 3.2 stretch out from boss, make things convenient for like this assembling and the welding in loop, termination, prevent from causing interior leakage; Bearing (ball) cover structure and the termination liquid cooling loop structure of different axle heads can be identical or different.
The port of export of the port of export of liquid cooling passage 1 and termination liquid cooling loop can further guarantee like this that not at same quadrant the flow velocity at intake-outlet place is balanced, lowers the temperature difference.
Above disclosed only is preferred embodiment of the present utility model, certainly can not limit with this interest field of the utility model, and the equivalence of therefore doing according to the utility model claim changes, and still belongs to protection range of the present utility model.
Claims (7)
1. fluid-cooled electrical machine, electric machine casing is the cylindrical shell that iron casting forms, and it is characterized in that: housing wall is provided with the liquid cooling passage, and the liquid cooling passage around the circumferential form concentric spirals of electric machine main shaft around forming circular helix; The inwall of cylindrical shell one end is provided with the round and smooth boss of integrally casting, and stator next-door neighbour housing is placed, and boss is vertically between the stator and coil of this end; The liquid cooling passage from import department's continuous helical of cylindrical shell one end around, and pass the exit that described boss arrives the cylindrical shell other end and form the loop; Two bearings end cap at electric machine main shaft is respectively equipped with the termination liquid cooling loop, and circumferential disc is around forming circular liquid cooling ring respectively in each bearing chamber outer for the termination liquid cooling loop, and each liquid cooling ring all consists of independent loop; Described liquid cooling passage and termination liquid cooling loop are the liquid cooling coil pipe coiling that wrought iron makes and form, and form the heat conduction with cylindrical shell or bearing (ball) cover and be connected; The gap that surrounds between inner walls and coil and stator and boss and or inwall and coil and stator between the gap all fill epoxy mortar.
2. motor according to claim 1, it is characterized in that: the inner and outer wall of described liquid cooling channel outer wall and same radial motor cylindrical shell all forms the interval.
3. motor according to claim 1 and 2, it is characterized in that: according to motor shaft to the temperature distribution situation, the circular helix of described liquid cooling passage is along the even interval of electrical axis direction or class interval, and when the class interval same group liquid cooling ring mutually be close to or the gap that exists less than the interval between on the same group not.
4. motor according to claim 3 is characterized in that: the import of liquid cooling passage and outlet reverse extending line intersect at the central axis of motor cylindrical shell.
5. according to claim 1 and 2 or 4 described motors, it is characterized in that: the port of export of termination liquid cooling loop and entrance point stretch out from the circular liquid cooling ring at place, and external part reverse extending line intersects at the circular air ring center of circle; Perhaps the port of export of termination liquid cooling loop and entrance point stretch out from the circular air ring cocurrent and parallel at place; The termination liquid cooling loop structure of different axle heads is identical or different.
6. motor according to claim 5, it is characterized in that: bearing (ball) cover is the round platform consistent with the cylindrical shell diameter, and the port of export of termination liquid cooling loop and entrance point stretch out from round platform; Perhaps bearing (ball) cover be diameter greater than the boss of cylindrical shell diameter, the port of export and the entrance point of termination liquid cooling loop stretch out from boss; Bearing (ball) cover structure and the termination liquid cooling loop structure of different axle heads are identical or different.
7. according to claim 1 and 2 or 4 or 6 described motors, it is characterized in that: the outlet of the outlet of liquid cooling passage and termination liquid cooling loop is not at same quadrant.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220432542 CN202818005U (en) | 2012-08-29 | 2012-08-29 | Liquid cooling motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220432542 CN202818005U (en) | 2012-08-29 | 2012-08-29 | Liquid cooling motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202818005U true CN202818005U (en) | 2013-03-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220432542 Expired - Fee Related CN202818005U (en) | 2012-08-29 | 2012-08-29 | Liquid cooling motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202818005U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111756153A (en) * | 2019-03-26 | 2020-10-09 | 湖南中车时代电动汽车股份有限公司 | Motor reducer integration frame |
| CN117656804A (en) * | 2020-11-30 | 2024-03-08 | 比亚迪股份有限公司 | Wheel drive assembly and vehicle |
-
2012
- 2012-08-29 CN CN 201220432542 patent/CN202818005U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111756153A (en) * | 2019-03-26 | 2020-10-09 | 湖南中车时代电动汽车股份有限公司 | Motor reducer integration frame |
| CN117656804A (en) * | 2020-11-30 | 2024-03-08 | 比亚迪股份有限公司 | Wheel drive assembly and vehicle |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130320 Termination date: 20150829 |
|
| EXPY | Termination of patent right or utility model |