A fully enclosed motor with stable internal pressure

Abstract

A fully enclosed motor with stable internal pressure includes a stator, a rotor, a rotor shaft, a front sealing end cover and a rear sealing end cover. The stator, the front sealing end cover and the rear sealing end cover are surrounded by a sealed cavity groove, the cavity groove is inserted with a rotor, the rotor shaft is plugged and fixed on the rotor, one end of the rotor shaft extends out of the front sealing end cover, a circular boss is formed in the middle of the rear sealing end cover, and the other end of the rotor shaft is hinged in the circular boss of the rear sealing end cover through a bearing; a plurality of vents are formed on the rear sealing end cover around the circular boss, a ring-shaped air bag is inserted on the circular boss of the rear sealing end cover, and a plurality of plugs connected to the inner cavity of the air bag are formed on one side end surface of the air bag, and the plugs are plugged into the vents of the rear sealing end cover. It adds an air bag on the outside of the motor that can balance the internal pressure of the motor, reducing the adverse effects of the motor running heat and the increase of internal pressure on the fully enclosed motor; at the same time, the air is not exchanged inside and outside the motor, which improves the life of the motor in a corrosive environment.

Description

Technical Field

[0001] The present invention relates to the technical field of fully enclosed motors, and more particularly to a fully enclosed motor with stable internal pressure. Background Art

[0002] The current fully enclosed motors are so-called fully enclosed in that the air around the motor does not circulate with the internal air of the motor, and a structure with a closed outer shell or a fully enclosed structure is formed in the inner cavity of the motor stator. During the operation of the fully enclosed motor, heat will be generated. The heat generated will cause the air in the sealed cavity of the fully enclosed motor to expand, resulting in an increase in the pressure inside the fully enclosed motor. The increased internal pressure will affect the normal operation of the fully enclosed motor and may even cause deformation of the motor, leakage of the internal sealed cavity, and damage and scrapping of the motor. Summary of the invention

[0003] The purpose of the present invention is to address the deficiencies of the prior art and to provide a fully enclosed motor with stable internal pressure. An air bag is added to the outside of the motor to balance the internal pressure of the motor, thereby reducing the adverse effects of heat generated during motor operation on the fully enclosed motor. At the same time, no air is exchanged between the inside and outside of the motor, thereby increasing the life of the motor in a corrosive environment.

[0004] A fully enclosed motor with stable internal pressure comprises a stator, a rotor, a rotor shaft, a front sealing end cover and a rear sealing end cover of the motor, wherein the stator, the front sealing end cover and the rear sealing end cover are surrounded by a sealed cavity, in which a rotor is inserted, and a rotor shaft is plugged and fixed on the rotor, one end of the rotor shaft extends out of the front sealing end cover, a circular boss protruding outward is formed in the middle of the rear sealing end cover, an outer ring of a bearing is plugged and fixed in the circular boss, and the other end of the rotor shaft is plugged and fixed in the inner ring of the bearing; a plurality of vents are formed on the rear sealing end cover around the circular boss, an annular airbag is inserted and sleeved on the circular boss of the rear sealing end cover, a plurality of plugs connected to the inner cavity of the airbag are formed on the end surface of the airbag close to the rear sealing end cover, and the plugs are plugged in the vents of the rear sealing end cover.

[0005] Preferably, the number of the plugs on the airbag is equal to the number of the vent holes on the rear sealing end cover, the number of the vent holes is at least three, and the vent holes are evenly distributed in a ring shape around the central axis of the rear sealing end cover.

[0006] Preferably, the outer wall of the plug on the airbag presses against the inner wall of the vent hole of the rear sealing end cover, and the head of the plug is formed with an annular retaining ring, which presses against the inner end surface of the rear sealing end cover.

[0007] Preferably, the airbag is in the shape of a ring, and the inner wall of the airbag is elastically pressed against the circular boss of the rear sealing end cover.

[0008] Preferably, the inner wall of the airbag and the end surface of the airbag close to the rear sealing end cover are coated with glue, and the inner wall of the airbag and the end surface of the airbag are respectively adhered and fixed to the outer end surface of the rear sealing end cover and the outer wall of the circular boss.

[0009] Preferably, a circular aluminum end plate is provided between the rear sealing end cover and the airbag, a circular recess opposite to the circular boss is formed on the aluminum end plate, the airbag is inserted into the circular recess of the aluminum end plate, and a through hole opposite to the plug is formed on the aluminum end plate; a circular ring-shaped protective cover is formed on the outer ring of the aluminum end plate, and the end of the protective cover close to the rear sealing end cover is fixed on the rear sealing end cover; a stud is formed in the middle of the aluminum end plate, a protective cover plate is screwed on the stud, and the outer ring of the protective cover plate rests on the inner wall of the protective cover.

[0010] Preferably, a thermally conductive silicone layer is provided between the aluminum end plate and the rear sealing end cover.

[0011] Preferably, a vent hole is formed on the protective cover plate inside the airbag, and a nut is disposed on the protective cover plate, and the nut is threadedly connected to the stud.

[0012] Preferably, a plurality of heat dissipation plates are fixed on the outer wall of the protective cover of the aluminum end plate, and the heat dissipation plates are evenly distributed in a ring shape around the central axis of the protective cover.

[0013] The beneficial effects of the present invention are:

[0014] 1. It adds an air bag on the outside of the motor to balance the internal pressure of the motor, thereby reducing the adverse effects of motor heating and increased internal pressure on the fully enclosed motor; at the same time, there is no air exchange between the inside and outside of the motor, which increases the life of the motor in a corrosive environment.

[0015] 2. It sets a heat dissipation protection structure between the motor and the airbag, which can not only protect the airbag but also improve the heat dissipation effect of the motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the three-dimensional structure of the motor of the present invention in a cold state;

[0017] Figure 2 It is a partial cross-sectional structural schematic diagram of the motor of the present invention in a cold state;

[0018] Figure 3 It is a schematic diagram of the three-dimensional structure of the motor of the present invention in the hot engine state;

[0019] Figure 4 It is a partial cross-sectional structural schematic diagram of the motor of the present invention in a hot engine state;

[0020] Figure 5 The schematic diagram of the motor of the present invention is additionally provided with an aluminum end plate structure.

[0021] In the figure: 1. stator; 2. rotor shaft; 3. front sealing end cover; 4. rear sealing end cover; 41. circular boss; 42. vent; 5. air bag; 51. plug; 6. bearing; 7. aluminum end plate; 71. protective cover; 72. stud; 8. thermal conductive silicone layer; 9. protective cover; 91. vent; 10. heat sink; 11. nut. DETAILED DESCRIPTION

[0022] Example: See Figures 1 to 5 As shown, a fully enclosed motor with stable internal pressure includes a stator 1, a rotor, a rotor shaft 2, a front sealing end cover 3 and a rear sealing end cover 4 of the motor. The stator 1, the front sealing end cover 3 and the rear sealing end cover 4 are surrounded by a sealed cavity, in which a rotor is inserted, and a rotor shaft 2 is inserted and fixed on the rotor, one end of the rotor shaft 2 extends out of the front sealing end cover 3, and a circular boss 41 protruding outward is formed in the middle of the rear sealing end cover 4, in which an outer ring of a bearing 6 is inserted and fixed, and the other end of the rotor shaft 2 is inserted and fixed in the inner ring of the bearing 6; a plurality of vents 42 are formed on the rear sealing end cover 4 around the circular boss 41, and an annular airbag 5 is inserted and sleeved on the circular boss 41 of the rear sealing end cover 4, and a plurality of plugs 51 connected to the inner cavity of the airbag 5 are formed on the end surface of the airbag 5 close to the rear sealing end cover 4, and the plugs 51 are inserted in the vents 42 of the rear sealing end cover 4.

[0023] Preferably, the number of the plugs 51 on the airbag 5 is equal to the number of the vent holes 42 on the rear sealing end cover 4 , the number of the vent holes 42 is at least three, and the vent holes 42 are evenly distributed in a ring shape around the central axis of the rear sealing end cover 4 .

[0024] Preferably, the outer wall of the plug 51 on the airbag 5 is pressed against the inner wall of the vent hole 42 of the rear sealing end cover 4 , and the head of the plug 51 is formed with an annular retaining ring, which is pressed against the inner end surface of the rear sealing end cover 4 .

[0025] Preferably, the airbag 5 is in a circular ring shape, and the inner wall of the airbag 5 is elastically pressed against the circular boss 41 of the rear sealing end cover 4 .

[0026] Preferably, the inner wall of the airbag 5 and the end surface of the airbag 5 close to the rear sealing end cover 4 are coated with glue, and the inner wall of the airbag 5 and the end surface of the airbag 5 are respectively adhered and fixed to the outer end surface of the rear sealing end cover 4 and the outer wall of the circular boss 41.

[0027] Preferably, a circular aluminum end plate 7 is provided between the rear sealing end cover 4 and the airbag 5, and a circular concave platform opposite to the circular boss 41 is formed on the aluminum end plate 7, and the airbag 5 is inserted into the circular concave platform of the aluminum end plate 7, and a through hole opposite to the plug 51 is formed on the aluminum end plate 7; a circular ring-shaped protective cover 71 is formed on the outer circle of the aluminum end plate 7, and one end of the protective cover 71 close to the rear sealing end cover 4 is inserted and fixed on the rear sealing end cover 4; a stud 72 is formed in the middle part of the aluminum end plate 7, and a protective cover plate 9 is screwed on the stud 72, and the outer circle of the protective cover plate 9 rests on the inner wall of the protective cover 71.

[0028] Preferably, a thermally conductive silicone layer 8 is provided between the aluminum end plate 7 and the rear sealing end cover 4 .

[0029] Preferably, a vent hole 91 is formed on the protective cover plate 9 on the inner side of the airbag 5 , and a nut 11 is disposed on the protective cover plate 9 , and the nut 11 is screwed onto the stud 72 .

[0030] Preferably, a plurality of heat dissipation plates 10 are fixed on the outer wall of the protective cover 71 of the aluminum end plate 7 , and the heat dissipation plates 10 are evenly distributed in a ring shape around the central axis of the protective cover 71 .

[0031] Working principle: The present invention is a fully enclosed motor with stable internal pressure. The fully enclosed motor mainly adds an airbag 5 that can be connected to the sealed cavity groove in the motor. When the fully enclosed motor is not running, that is, in the cold state, the airbag 5 is deflated. Figure 1 , Figure 2 As shown;

[0032] When the fully enclosed motor is running, heat will be generated inside it, that is, the hot engine state. The heat generated inside the fully enclosed motor will cause the gas to expand and the air pressure to increase. The expanded gas can enter the airbag 5 to expand the airbag 5, thereby balancing the air pressure inside the fully enclosed motor and achieving stable air pressure inside the fully enclosed motor. Figure 3 , Figure 4 As shown;

[0033] At the same time, an aluminum end plate 7 can be added on one side of the fully enclosed motor airbag 5. The protective cover 71 and the protective cover plate 9 on the aluminum end plate 7 can protect the airbag 5. At the same time, the aluminum end plate 7, the thermal conductive silicone layer 8 and the heat dissipation plate 10 can improve the heat dissipation of the fully enclosed motor.

[0034] The embodiments are used to illustrate the present invention, but not to limit the present invention. Any person skilled in the art may modify the embodiments without violating the spirit and scope of the present invention, and therefore, the scope of protection of the present invention shall be as set forth in the claims of the present invention.

Claims

1. A fully enclosed motor with stable internal pressure, comprising a stator (1), a rotor, a rotor shaft (2), a front sealing end cover (3) and a rear sealing end cover (4) of the motor, wherein the stator (1), the front sealing end cover (3) and the rear sealing end cover (4) are provided with a sealed cavity, the cavity is inserted with a rotor, the rotor shaft (2) is inserted and fixed on the rotor, and one end of the rotor shaft (2) extends out of the front sealing end cover (3), characterized in that: A circular boss (41) protruding outward is formed in the middle of the rear sealing end cover (4), an outer ring of a bearing (6) is inserted and fixed in the circular boss (41), and the other end of the rotor shaft (2) is inserted and fixed in the inner ring of the bearing (6); a plurality of vent holes (42) are formed on the rear sealing end cover (4) around the circular boss (41), an annular airbag (5) is inserted and sleeved on the circular boss (41) of the rear sealing end cover (4), a plurality of plugs (51) connected to the inner cavity of the airbag (5) are formed on the end surface of the airbag (5) close to the rear sealing end cover (4), and the plugs (51) are inserted in the vent holes (42) of the rear sealing end cover (4); The airbag (5) is annular in shape, and the inner wall of the airbag (5) is elastically pressed against the circular boss (41) of the rear sealing end cover (4); A circular aluminum end plate (7) is provided between the rear sealing end cover (4) and the airbag (5), and a circular concave platform opposite to the circular boss (41) is formed on the aluminum end plate (7), and the airbag (5) is inserted into the circular concave platform of the aluminum end plate (7), and a through hole opposite to the plug (51) is formed on the aluminum end plate (7); an annular protective cover (71) is formed on the outer ring of the aluminum end plate (7), and one end of the protective cover (71) close to the rear sealing end cover (4) is inserted and fixed on the rear sealing end cover (4); a stud (72) is formed in the middle of the aluminum end plate (7), and a protective cover plate (9) is screwed onto the stud (72), and the outer ring of the protective cover plate (9) abuts against the inner wall of the protective cover (71).

2. A fully enclosed motor with stable internal pressure according to claim 1, characterized in that: The number of the plugs (51) on the airbag (5) is equal to the number of the vent holes (42) on the rear sealing end cover (4), the number of the vent holes (42) is at least three, and the vent holes (42) are evenly distributed in a ring shape around the central axis of the rear sealing end cover (4).

3. A fully enclosed motor with stable internal pressure according to claim 2, characterized in that: The outer wall of the plug (51) on the airbag (5) is pressed against the inner wall of the vent hole (42) of the rear sealing end cover (4), and the head of the plug (51) is formed with an annular retaining ring, which is pressed against the inner end surface of the rear sealing end cover (4).

4. A fully enclosed motor with stable internal pressure according to claim 1, characterized in that: The inner wall of the airbag (5) and the end surface of the airbag (5) on the side close to the rear sealing end cover (4) are coated with glue, and the inner wall of the airbag (5) and the end surface of the airbag (5) are respectively adhered and fixed to the outer end surface of the rear sealing end cover (4) and the outer wall of the circular boss (41).

5. A fully enclosed motor with stable internal pressure according to claim 1, characterized in that: A heat-conducting silica gel layer (8) is provided between the aluminum end plate (7) and the rear sealing end cover (4).

6. A fully enclosed motor with stable internal pressure according to claim 1, characterized in that: A vent hole (91) is formed on the protective cover plate (9) on the inner side of the airbag (5), and a nut (11) is disposed on the protective cover plate (9), and the nut (11) is screwed onto the stud (72).

7. A fully enclosed motor with stable internal pressure according to claim 1, characterized in that: A plurality of heat dissipation plates (10) are fixed on the outer wall of the protective cover (71) of the aluminum end plate (7), and the heat dissipation plates (10) are evenly distributed in a ring shape around the central axis of the protective cover (71).

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