CN112186971B - Heat dissipation ventilation labyrinth structure for rotating motor - Google Patents

Heat dissipation ventilation labyrinth structure for rotating motor Download PDF

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Publication number
CN112186971B
CN112186971B CN202010865014.5A CN202010865014A CN112186971B CN 112186971 B CN112186971 B CN 112186971B CN 202010865014 A CN202010865014 A CN 202010865014A CN 112186971 B CN112186971 B CN 112186971B
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China
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layer cylinder
labyrinth
hole
breathable film
layer
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CN112186971A (en
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殷德军
王乐
陈璐俊
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Nanjing Aotebo Electromechanical Technology Co ltd
Nanjing University of Science and Technology
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Nanjing Aotebo Electromechanical Technology Co ltd
Nanjing University of Science and Technology
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K9/00—Arrangements for cooling or ventilating
    • H02K9/19—Arrangements for cooling or ventilating for machines with closed casing and closed-circuit cooling using a liquid cooling medium, e.g. oil
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
    • H02K5/10—Casings or enclosures characterised by the shape, form or construction thereof with arrangements for protection from ingress, e.g. water or fingers
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K9/00—Arrangements for cooling or ventilating
    • H02K9/02—Arrangements for cooling or ventilating by ambient air flowing through the machine
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K9/00—Arrangements for cooling or ventilating
    • H02K9/14—Arrangements for cooling or ventilating wherein gaseous cooling medium circulates between the machine casing and a surrounding mantle
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K9/00—Arrangements for cooling or ventilating
    • H02K9/19—Arrangements for cooling or ventilating for machines with closed casing and closed-circuit cooling using a liquid cooling medium, e.g. oil
    • H02K9/193—Arrangements for cooling or ventilating for machines with closed casing and closed-circuit cooling using a liquid cooling medium, e.g. oil with provision for replenishing the cooling medium; with means for preventing leakage of the cooling medium
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K9/00—Arrangements for cooling or ventilating
    • H02K9/19—Arrangements for cooling or ventilating for machines with closed casing and closed-circuit cooling using a liquid cooling medium, e.g. oil
    • H02K9/20—Arrangements for cooling or ventilating for machines with closed casing and closed-circuit cooling using a liquid cooling medium, e.g. oil wherein the cooling medium vaporises within the machine casing

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Motor Or Generator Frames (AREA)
  • Motor Or Generator Cooling System (AREA)

Abstract

The invention discloses a labyrinth structure for heat dissipation and air exchange of a rotating motor, wherein a bulge is arranged on a motor shell, round holes for communicating the interior of the motor with the outside air are formed in the bulge, the bulge is connected with labyrinth structural members, the number of the labyrinth structural members is more than one, the labyrinth structural members are of step-shaped cylindrical structures, holes at the lower parts of the labyrinth structural members are non-through holes, a platform is arranged in the labyrinth structural members, through holes are uniformly formed in the edge, close to the inner wall, of the platform, a waterproof breathable film is arranged at the outlet of the labyrinth structural member at the top, a breathable film protective sleeve is arranged on the waterproof breathable film, and through holes are formed in the side part of the breathable film protective sleeve. The labyrinth passage at the inner side of the breathable film can enable the atomized cooling liquid to be cooled and flow back when the motor runs, and the protection structure at the outer side of the breathable film can effectively reduce the damage of dust, mud and other pollutants to the breathable film, so that the motor air permeability is ensured, and the functions of cooling the atomized cooling oil and protecting the breathable film from being damaged by the pollutants are achieved.

Description

Heat dissipation and ventilation labyrinth structure for rotating motor
Technical Field
The invention belongs to the technical field of motor cooling, and particularly relates to a heat dissipation and ventilation labyrinth structure of a rotating motor.
Background
The existing liquid cooling modes of the rotating motor are mainly two, namely, a tortuous water channel is arranged on a motor shell, and a motor stator is cooled by low-temperature circulating cooling water, namely water cooling; the other type is that at the inside fueling injection equipment that sets up of motor casing, the stator winding fixed point to the high temperature spouts cooling fluid and realizes the cooling to the stator, inside the cooling fluid of the inside high temperature of motor flowed out the motor casing by the circulation oil circuit of motor, carries out cooling in the condensing equipment of outside, then gets back to the inside winding to the motor stator of motor casing again through refrigerated coolant liquid and cools off, forms cooling cycle, is called as oil-cold. Inside the motor of oil cooling mode, because high temperature and high-speed rotatory rotor effect can lead to at that time at the inside partial cooling fluid of motor casing atomizing to make the inside pressure of motor casing too high, can cause very big challenge to the motor is sealed, the condition of outside oil impregnate will appear this moment to the relatively poor motor of leakproofness, so must carry out the pressure release to oil cooling motor casing inside.
The existing method for ventilating and decompressing the oil-cooled motor comprises the following steps: the motor shell is provided with the one-way vent valve, and the structure can provide overpressure protection inside the motor shell and prevent the internal pressure of the motor from being too high. However, use one-way breather valve device at the pressure release in-process, to the inside vaporific cooling fluid that forms of motor because high temperature does not have refrigerated effect, lead to vaporific coolant liquid to attach on the pellicle of ventilative valve port when the air along with in the motor flows, in the long run, the cooling fluid accumulation caused the pellicle to block up on the pellicle, made whole one-way breather valve exist can not the pressure release, caused the motor to appear the condition of outside oil seepage when the operation.
Disclosure of Invention
The invention aims to provide a heat dissipation and ventilation labyrinth structure for an oil-cooled rotating motor, which can play a role in cooling atomized cooling oil and enabling the atomized cooling oil to flow back while ensuring the air permeability of the motor.
The technical scheme for realizing the purpose of the invention is as follows: a heat dissipation ventilation labyrinth structure for a rotating motor is characterized in that a bulge is arranged on one side of the rotating motor, more than one labyrinth structural member is connected to the outer side of the bulge, the labyrinth structural members are stacked in sequence from bottom to top, a breathable film is arranged at the outlet of the labyrinth structural member at the top, a breathable film protective sleeve is arranged on the breathable film, and the bulge, the labyrinth structural member, the breathable film and the protective sleeve form a tortuous labyrinth channel which is formed inside the motor and is connected with the outside;
the labyrinth structural part at the top is of a three-layer step-shaped cylindrical structure, the outer diameters of an upper-layer cylinder, a middle-layer cylinder and a lower-layer cylinder of the three-layer step-shaped cylindrical structure are sequentially increased, second through holes are formed in the upper-layer cylinder and the middle-layer cylinder, a non-through round hole is formed in the lower-layer cylinder, a middle platform is arranged in the lower-layer cylinder, the lower-layer cylinder is divided into an upper cavity and a lower cavity by the middle platform, and the upper cavity is communicated with the second through holes;
and a third through hole is formed in the edge of the middle platform connected with the inner wall of the lower-layer cylinder, the third through hole is over against the step surface at the junction of the lower-layer cylinder and the middle-layer cylinder, and the third through hole cannot be observed from the direction of the second through hole in a front view.
Further, protruding and motor casing integrated casting shaping, protruding appearance are step-like cylindrical structure, and protruding upper portion external diameter is less than protruding lower part, the first through-hole of inside and external world of intercommunication motor is seted up to the arch, and first through-hole is located above the liquid level of the inside cooling fluid of motor casing. Alternatively, as another preferred mode, the projection is connected to the motor housing by a connecting pipe, one end of which is led out from the motor housing, and the other end of which is connected to the projection.
Furthermore, the inner surface and the outer surface of the breathable film protective sleeve are cylindrical surfaces, one end of the breathable film protective sleeve is closed, an opening communicated with the breathable film is formed in the side part of the breathable film protective sleeve, and the outer surface of the middle-layer cylinder corresponds to the inner cylindrical surface of the breathable film protective sleeve; the height of the opening is lower than the installation height of the breathable film and higher than the height of the step surface at the top of the middle-layer cylinder.
Furthermore, the shape of the open hole and the third through hole is square holes, round holes or oblong holes, and the number of the open hole and the third through hole is more than 3.
Furthermore, the open holes and the third through holes are uniformly distributed along the circumferential direction.
Preferably, the number of the labyrinth structures is one, and the inner cylindrical surface of the lower cylinder corresponds to the outer convex surface.
As another preferred mode, the number of the labyrinth structural members is two, the labyrinth structural member at the bottom is a two-layer step-shaped cylindrical structure, the outer diameters of an upper-layer cylinder and a lower-layer cylinder are sequentially increased, the upper-layer cylinder is provided with a fourth through hole, the lower-layer cylinder is provided with a non-through round hole, a middle platform is arranged in the lower-layer cylinder, the middle platform divides the lower-layer cylinder into an upper cavity and a lower cavity, and the upper cavity is communicated with the fourth through hole; a fifth through hole is formed in the edge of the middle platform connected with the inner wall of the lower-layer cylinder, the fifth through hole is over against the step surface at the junction of the lower-layer cylinder and the upper-layer cylinder, and the fifth through hole cannot be observed from the direction of the fourth through hole in a front view; the outer surface of the upper layer cylinder is connected with the inner surface of the lower layer cylinder of the top labyrinth structure, and the inner cylindrical surface of the lower layer cylinder corresponds to the outer surface of the bulge.
As another preferred mode, the number of the labyrinth structural members is more than three, except for the top labyrinth structural member, the rest labyrinth structural members are of two-layer step-shaped cylindrical structures, the outer diameters of an upper layer cylinder and a lower layer cylinder are sequentially increased, a fourth through hole is formed in the upper layer cylinder, a non-through round hole is formed in the lower layer cylinder, a middle platform is arranged in the lower layer cylinder, the middle platform divides the lower layer cylinder into an upper cavity and a lower cavity, and the upper cavity is communicated with the fourth through hole; a fifth through hole is formed in the edge of the middle platform connected with the inner wall of the lower-layer cylinder, the fifth through hole is over against the step surface at the junction of the lower-layer cylinder and the upper-layer cylinder, and the fifth through hole cannot be observed from the direction of the fourth through hole in a front view; the outer surface of the upper-layer cylinder is connected with the inner surface of the lower-layer cylinder of the labyrinth structural member above, the inner surface of the lower-layer cylinder is connected with the outer surface of the upper-layer cylinder of the labyrinth structural member below, and the inner cylindrical surface of the lower-layer cylinder of the labyrinth structural member at the bottommost corresponds to the outer surface of the protrusion.
Compared with the prior art, the invention has the following remarkable advantages: (1) the invention adopts a labyrinth structure to ensure that the atomized cooling oil distributed in the labyrinth channel along with the air flow is fully contacted with the low-temperature inner wall of the labyrinth, cooled and reflows to the inside of the motor shell, so that the atomized cooling oil is cooled to a certain extent while the inside of the motor is ventilated and decompressed, and the semipermeable membrane is ensured not to be blocked by the accumulated atomized cooling oil; (2) the special structure of the breathable film protective sleeve also forms a simple labyrinth passage at the outer side of the breathable film, so that the breathable film is not directly contacted with the external environment, solid particles, mud and other dirt in the external environment are effectively prevented from damaging the breathable film, and the breathable film is protected while the motor breathability is ensured; (3) the invention is suitable for all forced cooling type rotating motors and has the advantages of low cost, high reliability and the like.
The invention is further described with reference to the following figures and specific embodiments.
Drawings
Fig. 1 is a schematic view of a heat dissipation ventilation labyrinth structure of a motor according to the present invention.
Fig. 2 is a schematic view of a projection hole on a motor housing of the present invention.
FIG. 3 is a cross-sectional view of the labyrinth structure of the present invention.
FIG. 4 is a perspective view of the labyrinth structure of the present invention.
FIG. 5 is a perspective view of a breathable film protective cover according to the present invention.
Detailed Description
In order to make the technical problems and technical solutions solved by the present invention clear, the present invention is further described in detail below with reference to the accompanying drawings and embodiments.
Example 1
The number of the labyrinth structural members is one in the embodiment.
As shown in fig. 1 and 2, a bulge 1 is arranged on a motor shell, the bulge 1 is integrally cast and molded on the motor shell, a first through hole for communicating the interior of the motor with the outside is formed in the bulge 1, a labyrinth structural member 2 is hermetically connected with the bulge 1 through threads or other connection modes, a breathable film 4 is arranged at the middle position of the top end of an upper cylinder 2-1 of the labyrinth structural member 2 in a bonding or welding mode, a breathable film protective sleeve 3 is arranged above the breathable film, and the breathable film is wrapped in the protective sleeve 3; the protruding 1 on the casing the labyrinth structure 2 the ventilated membrane 4 and ventilated membrane protective sheath 3 constitutes the inside and external tortuous labyrinth of connecting motor and takes a breath the passageway.
As shown in fig. 1, the heat dissipation ventilation labyrinth structure has a tortuous labyrinth passage at the inner side of the air permeable membrane 4, and during the operation of the motor, atomized cooling oil formed due to high temperature and high-speed rotation of the rotor enters the labyrinth passage formed by the inner hole of the protrusion 1 and the labyrinth structural member 2 and is blocked by the air permeable membrane 4, and the atomized cooling oil is changed into a liquid state in the labyrinth passage under the cooling action of the inner wall of the passage and the outside air and flows back to the inside of the motor along the labyrinth passage; the labyrinth passage plays a role in cooling the motor coolant and stabilizing the internal pressure of the motor.
As shown in fig. 1, the breathable film 4 is a waterproof and oil-proof breathable film, and prevents liquid and mist cooling oil from entering the external environment, and conveys external cold air to the labyrinth structure and the inside of the motor, so as to play the roles of heat dissipation and ventilation of the motor and stabilization of the internal pressure of the motor.
The special structure of the breathable protective sleeve 3 also forms a simple labyrinth passage outside the breathable film 4, so that the breathable film is not directly contacted with the external environment, solid particles, mud and other pollutants in the external environment are effectively prevented from damaging the breathable film, and the breathable film is protected while the breathability of the motor is ensured.
As shown in fig. 3 and 4, the labyrinth structure 2 is of a three-layer step-shaped cylindrical structure, the outer diameters of an upper-layer cylinder 2-1, a middle-layer cylinder 2-2 and a lower-layer cylinder 2-3 are sequentially increased, a second through hole 2-6 is formed in the upper-layer cylinder 2-1 and the middle-layer cylinder 2-2, a non-through round hole is formed in the lower-layer cylinder 2-3, a middle platform 2-4 is arranged in the lower-layer cylinder 2-3, the lower-layer cylinder 2-3 is divided into an upper chamber and a lower chamber by the middle platform 2-4, and the upper chamber is communicated with the second through hole 2-6; third through holes 2-5 are uniformly distributed at the edge of a middle platform 2-4 connected with the inner wall of the lower layer cylinder 2-3, the third through holes 2-5 are over against the step surface at the junction of the lower layer cylinder 2-3 and the middle layer cylinder 2-2, and the third through holes 2-5 can not be observed from the front view of the direction of the second through holes 2-6.
The lower chamber of the lower-layer cylinder 2-3, the third through hole 2-5, the upper chamber of the lower-layer cylinder 2-3 and the second through hole 2-6 of the upper-layer cylinder 2-1 jointly form a zigzag labyrinth passage.
As shown in fig. 4, the shape of the third through hole 2-5 may be a round hole, an oblong hole, a square hole, or the like, as long as the gas passage and the liquid backflow are facilitated, and the shape is not limited; the number of the third through holes 2-5 is more than three.
As shown in fig. 5, the side of the air-permeable membrane protective sleeve 3 is uniformly provided with openings 3-1, the opening positions of the openings 3-1 are lower than the installation height of the air-permeable membrane 4, the openings 3-1 can be round holes, square holes and the like, and are not limited to shapes, so that air can pass through the openings, and as a preferable scheme, the number of the openings 3-1 uniformly distributed can be more than 3.
As shown in fig. 1 and fig. 2, the inner surface of the breathable film protective sleeve 3 corresponds to the outer surface of an upper-layer cylinder 2-1 of the labyrinth structural member 2 and is hermetically connected with the upper-layer cylinder 2-1 of the labyrinth structural member by threads or other connection modes; as shown in fig. 1, 2 and 3, the lower cylindrical inner surface of the labyrinth structure 2 corresponds to the outer surface of the upper portion 1-1 of the projection 1, and is sealingly connected to the upper cylindrical portion 1-1 of the projection 1 by means of a screw thread or other connection means.
When the labyrinth structure is assembled, the air-permeable membrane 4 is firstly bonded or welded on the top end of the upper-layer cylinder 2-1 of the labyrinth structure 2, then the labyrinth structure 2 is hermetically installed on the bulge 1 on the motor shell, and finally the protective sleeve 3 is installed on the labyrinth structure 2. It should be noted that the position of the air permeable membrane 4 is higher than the opening 3-1 of the protective cover 3, so that a simple labyrinth passage on the outer side of the air permeable membrane can be effectively formed, and the air permeable membrane 4 can be effectively protected from the damage of the contaminants.
As described above, when the motor is running, atomized cooling oil enters the labyrinth passage at the inner side of the breathable film 4, and is cooled by cold air entering the labyrinth passage through the inner wall of the labyrinth passage and the outside, the atomized cooling oil is cooled to be in a liquid state and flows back to the inside of the motor, and the labyrinth passage plays a role in cooling motor cooling liquid and stabilizing the pressure inside the motor; the special structure of ventilated membrane protective sheath 3 forms simple labyrinth passageway in the ventilated membrane 4 outside equally, makes the ventilated membrane indirect and external environment contact, prevents effectively that filths such as solid particulate matter, mud in the external environment from to the harm of ventilated membrane, protects the ventilated membrane when guaranteeing the motor gas permeability.
Example 2
The difference from the embodiment 1 is that the number of the labyrinth structural members 2 in the embodiment is two, the labyrinth structural members are respectively a top labyrinth structural member and a bottom labyrinth structural member, and the structure of the top labyrinth structural member is the same as that of the labyrinth structural member in the embodiment 1 and is a three-layer step-shaped cylindrical structure; the bottom labyrinth structure part is of a two-layer step-shaped cylindrical structure, the outer diameters of an upper layer cylinder and a lower layer cylinder are sequentially increased, the upper layer cylinder is provided with a fourth through hole, the lower layer cylinder is provided with a non-through round hole, a middle platform is arranged in the lower layer cylinder, the middle platform divides the lower layer cylinder into an upper cavity and a lower cavity, and the upper cavity is communicated with the fourth through hole; a fifth through hole is formed in the edge of the middle platform connected with the inner wall of the lower-layer cylinder, the fifth through hole is over against the step surface at the junction of the lower-layer cylinder and the upper-layer cylinder, and the fifth through hole cannot be observed from the direction of the fourth through hole in a front view; wherein the lower cylindrical inner surface of the top labyrinth structure is connected with the upper cylindrical outer surface of the bottom labyrinth structure, and the lower cylindrical inner surface of the bottom labyrinth structure is connected with the protrusion 1.
Example 3
Unlike embodiment 2, the number of labyrinth structures 2 in this embodiment is three or more. The middle labyrinth structural part is connected between the top labyrinth structural part and the bottom labyrinth structural part, the middle labyrinth structural part is of a two-layer step-shaped cylindrical structure, the outer diameters of an upper layer cylinder and a lower layer cylinder of the two-layer step-shaped cylindrical structure are sequentially increased, a fourth through hole is formed in the upper layer cylinder, a non-through round hole is formed in the lower layer cylinder, a middle platform is arranged in the lower layer cylinder, the middle platform divides the interior of the lower layer cylinder into an upper cavity and a lower cavity, and the upper cavity is communicated with the fourth through hole; a fifth through hole is formed in the edge of the middle platform connected with the inner wall of the lower-layer cylinder, the fifth through hole is over against the step surface at the junction of the lower-layer cylinder and the upper-layer cylinder, and the fifth through hole cannot be observed from the direction of the fourth through hole in a front view; the outer surface of the upper-layer cylinder is connected with the inner surface of the lower-layer cylinder of the labyrinth structural member above, and the inner surface of the lower-layer cylinder is connected with the outer surface of the upper-layer cylinder of the labyrinth structural member below.
The foregoing detailed description of the preferred embodiments of the invention has been presented. It should be understood that numerous modifications and variations could be devised by those skilled in the art in light of the present teachings without departing from the inventive concepts. Therefore, the technical solutions available to those skilled in the art through logic analysis, reasoning and limited experiments based on the prior art according to the concept of the present invention should be within the scope of protection defined by the claims.

Claims (9)

1. A heat dissipation ventilation labyrinth structure for a rotating electrical machine is characterized in that one side of the rotating electrical machine is provided with a bulge (1), more than one labyrinth structural member (2) is connected to the outer side of the bulge (1), the labyrinth structural members (2) are stacked from bottom to top in sequence, a breathable film (4) is arranged at the outlet of the labyrinth structural member (2) at the top, a breathable film protective sleeve (3) is arranged on the breathable film (4), and the bulge (1), the labyrinth structural member (2), the breathable film (4) and the protective sleeve (3) form a tortuous labyrinth channel which is connected with the outside inside of the motor;
the labyrinth structure (2) positioned at the top is of a three-layer step-shaped cylindrical structure, the outer diameters of an upper-layer cylinder (2-1), a middle-layer cylinder (2-2) and a lower-layer cylinder (2-3) of the three-layer step-shaped cylindrical structure are sequentially increased, a second through hole (2-6) is formed in the upper-layer cylinder (2-1) and the middle-layer cylinder (2-2), a non-through round hole is formed in the lower-layer cylinder (2-3), a middle platform (2-4) is arranged in the lower-layer cylinder (2-3), the middle platform (2-4) divides the lower-layer cylinder (2-3) into an upper cavity and a lower cavity, and the upper cavity is communicated with the second through hole (2-6);
and a third through hole (2-5) is formed in the edge of a middle platform (2-4) connected with the inner wall of the lower-layer cylinder (2-3), the third through hole (2-5) is over against the step surface at the junction of the lower-layer cylinder (2-3) and the middle-layer cylinder (2-2), and the third through hole (2-5) cannot be observed from the direction of the second through hole (2-6) in a front view.
2. The heat dissipation ventilation labyrinth structure for the rotating electrical machine as claimed in claim 1, wherein the protrusion (1) is integrally cast with the motor casing, the protrusion (1) has a stepped cylindrical shape, the outer diameter of the upper portion of the protrusion is smaller than that of the lower portion of the protrusion, the protrusion (1) is provided with a first through hole communicating the inside of the motor with the outside, and the first through hole is located above the liquid level of the cooling oil inside the motor casing.
3. The heat-dissipating ventilation labyrinth structure for a rotary electric machine according to claim 1, wherein the boss (1) is connected to a motor housing through a connection pipe, one end of which is led out from the motor housing and the other end of which is connected to the boss (1).
4. The heat dissipation ventilation labyrinth structure for the rotating electrical machine as claimed in claim 1, wherein the inner and outer surfaces of the air-permeable membrane protective sleeve (3) are cylindrical surfaces and one end is closed, the side of the air-permeable membrane protective sleeve (3) is provided with an opening (3-1) communicated with the air-permeable membrane, and the outer surface of the middle layer cylinder (2-2) corresponds to the inner cylindrical surface of the air-permeable membrane protective sleeve (3); the height of the opening (3-1) is lower than the installation height of the breathable film (4) and higher than the height of the top step surface of the middle-layer cylinder (2-2).
5. The heat dissipation ventilation labyrinth structure for the rotating electrical machine according to claim 4, wherein the openings (3-1) and the third through holes (2-5) are square holes, round holes or oblong holes, and the number of the openings is 3 or more.
6. The heat dissipation ventilation labyrinth structure for a rotating electrical machine according to claim 5, characterized in that the openings (3-1), the third through holes (2-5) are evenly distributed in the circumferential direction.
7. The heat dissipation ventilation labyrinth for the rotating electrical machine as claimed in any one of claims 4 to 6, wherein the number of the labyrinth members is one, and the inner cylindrical surface of the lower cylinder corresponds to the outer surface of the projection (1).
8. The heat dissipation ventilation labyrinth structure for the rotating electrical machine according to any one of claims 4 to 6, wherein the number of the labyrinth structural members is two, the labyrinth structural members at the bottom are two-layer stepped cylindrical structures, the outer diameters of the upper-layer cylinder and the lower-layer cylinder are sequentially increased, the upper-layer cylinder is provided with a fourth through hole, the lower-layer cylinder is provided with a non-through circular hole, an intermediate platform is arranged inside the lower-layer cylinder, the intermediate platform divides the lower-layer cylinder into an upper chamber and a lower chamber, and the upper chamber is communicated with the fourth through hole; a fifth through hole is formed in the edge of the middle platform connected with the inner wall of the lower-layer cylinder, the fifth through hole is over against the step surface at the junction of the lower-layer cylinder and the upper-layer cylinder, and the fifth through hole cannot be observed from the direction of the fourth through hole in a front view; the outer surface of the upper-layer cylinder is connected with the inner surface of the lower-layer cylinder of the top labyrinth structure, and the inner cylindrical surface of the lower-layer cylinder corresponds to the outer surface of the protrusion (1).
9. The heat dissipation ventilation labyrinth structure for the rotating electrical machine according to any one of claims 4 to 6, wherein the number of the labyrinth structural members is three or more, the labyrinth structural members other than the top labyrinth structural member are of a two-layer stepped cylindrical structure, outer diameters of an upper-layer cylinder and a lower-layer cylinder are sequentially increased, the upper-layer cylinder is provided with a fourth through hole, the lower-layer cylinder is provided with a non-through circular hole, a middle platform is arranged inside the lower-layer cylinder, the middle platform divides the lower-layer cylinder into an upper cavity and a lower cavity, and the upper cavity is communicated with the fourth through hole; a fifth through hole is formed in the edge of the middle platform connected with the inner wall of the lower-layer cylinder, the fifth through hole is over against the step surface at the junction of the lower-layer cylinder and the upper-layer cylinder, and the fifth through hole cannot be observed from the direction of the fourth through hole in a front view; the outer surface of the upper-layer cylinder is connected with the inner surface of the lower-layer cylinder of the labyrinth structural member above, the inner surface of the lower-layer cylinder is connected with the outer surface of the upper-layer cylinder of the labyrinth structural member below, and the inner cylindrical surface of the lower-layer cylinder of the labyrinth structural member at the bottommost corresponds to the outer surface of the protrusion (1).
CN202010865014.5A 2020-08-25 2020-08-25 Heat dissipation ventilation labyrinth structure for rotating motor Active CN112186971B (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101984274B (en) * 2010-09-29 2012-10-10 中国铝业股份有限公司 Labyrinth-type breather hole cover
CN201887584U (en) * 2010-10-28 2011-06-29 比亚迪股份有限公司 Motor ventilation membrane protection structure
CN207740436U (en) * 2017-12-28 2018-08-17 盛瑞传动股份有限公司 respirator and gearbox

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