CN219086915U - Pressure release waterproof structure of wet and dry motor - Google Patents

Abstract

The application relates to a pressure release waterproof construction of wet and dry dual-purpose motor relates to wet and dry motor technical field. The air cover comprises an inner shell and an air cover sleeved on the outer side wall of the inner shell, an air cavity for air circulation is formed between the inner shell and the air cover, a placement channel is formed between the inner shell and the air cover in a penetrating mode from top to bottom, one end of the placement channel is an air suction inlet, the other end of the placement channel is an air inlet, an exhaust hole communicated with the air cavity is formed in one side, close to the air suction inlet, of the inner side wall of the inner shell, a driving cavity is connected with the inner wall of one side, far away from the air suction inlet, of the inner shell, an air flow channel for enabling the inner shell to be communicated with the air cavity is arranged between the inner shell and the driving cavity, and a shielding soft cushion for enabling the air flow channel to circulate unidirectionally is arranged between the inner shell and the air cover. When the motor works, cooling air flows into the driving cavity through the air inlet, blows the shielding cushion to open the air flow channel, then enters the air cavity, flows into the air inlet through the exhaust hole, realizes cooling and sealing of the motor, and improves the working efficiency.

Description

Pressure release waterproof structure of wet and dry motor

Technical Field

The application relates to the field of wet and dry motors, in particular to a pressure release waterproof structure of a wet and dry motor.

Background

The motor refers to an electromagnetic device for converting or transmitting electric energy according to the law of electromagnetic induction.

The wet and dry motor is a core component of the dust collector, and the most basic design requirement of the wet and dry motor is waterproof. The dry-wet motor comprises an inner shell, wherein the inner wall of the inner shell is connected with a driving cavity for placing elements such as a stator core, a rotor and the like, and a working cavity for placing elements such as a fixed impeller, a movable impeller and the like is formed between the driving cavity and the thin-wall shell. Because the dry-wet motor can continuously generate heat in the use process, most manufacturers can achieve the aim of cooling the motor by additionally arranging a fan inside the dry-wet motor.

In realizing the above-described related art, the inventors found that there are at least the following problems in the art: after the fan is added, the load driven by the wet and dry motor is increased, the energy provided by the motor for the work load of the dust collector is certain, and after the heat dissipation load is increased, the energy distributed to the work load is reduced, so that the actual work efficiency of the wet and dry motor is reduced, and the improvement is needed.

Disclosure of Invention

In order to improve the work efficiency of the wet and dry motor under the premise of not influencing heat dissipation, the application provides a pressure release waterproof structure of the wet and dry motor.

The application provides a pressure release waterproof construction of dual-purpose motor futilely wets adopts following technical scheme:

the utility model provides a pressure release waterproof construction of dual-purpose motor futilely wets, includes inner housing and cover are located the fan housing of inner housing lateral wall, the inner housing with be formed with the wind chamber that can supply the circulation of air between the fan housing, the inner housing with from top to bottom runs through and has seted up the passageway of placing, the one end of placing the passageway is the inlet scoop, the other end of placing the passageway is the air intake, the inside wall of inner housing is close to one side of inlet scoop seted up with the exhaust hole that the wind chamber is linked together, the inner housing is kept away from the inner wall of one side of inlet scoop is connected with the drive cavity that is used for placing stator core and rotor, the inner housing with be provided with between the drive cavity and make the air current passageway be linked together's air current passageway, be provided with between the inner housing with be used for making between the fan housing the cushion that the air current passageway is one-way circulate.

Through adopting above-mentioned technical scheme, during operation of motor, inlet scoop department produces the negative pressure, and the cooling air of air intake top can flow to inlet scoop department, and the cooling air is first in the drive cavity, and the cushion is sheltered from in the blowing afterwards, makes air current channel and wind chamber intercommunication, and the cooling air flows into the wind chamber, and then flows into inlet scoop department through the exhaust hole, realizes the cooling to the motor. When the motor stops working, the greater the pressure of the air flow entering the air cavity from the air inlet is, the better the sealing performance between the shielding cushion and the air flow channel is, so that the air flow at the air inlet cannot carry water vapor into the driving cavity. Finally, the working efficiency of the motor is improved on the premise of not affecting the water resistance and heat dissipation.

Optionally, the shielding cushion is detachably connected with the inner shell.

Through adopting above-mentioned technical scheme, when the ageing scheduling problem appears in the shielding cushion, be convenient for change and shelter from the cushion in order to guarantee the leakproofness between shielding cushion and the air current passageway.

Optionally, a clamping groove for inserting the shielding cushion part is formed in an end wall, close to the air inlet, of the inner shell.

By adopting the technical scheme, when the shielding cushion is installed, the shielding cushion is directly inserted into the clamping groove; and the clamping groove can not be completely inserted by the shielding cushion, so that a part of the shielding cushion is ensured to be outside the clamping groove, and the air flow can blow the shielding cushion conveniently, so that the air flow channel is opened.

Optionally, the shielding cushion includes inserts and locates connecting portion and shielding portion of joint groove, the thickness of connecting portion is greater than the thickness of shielding portion, just shielding portion with the laminating of inner shell body.

By adopting the technical scheme, when the motor does not work, the shielding part is attached to the inner shell, so that the tightness between the shielding part and the inner shell can be effectively ensured, and the possibility that water vapor at the air suction port enters the driving cavity is reduced; the thickness of the connecting part wind is larger than that of the shielding part, so that cooling wind can blow the shielding part conveniently, and the shielding part can incline towards the direction close to the fan housing, thereby opening the airflow channel.

Optionally, an auxiliary groove is formed in one side, close to the inner shell, of the shielding part.

Through adopting above-mentioned technical scheme, reduce the thickness of shielding part and cooling air direct contact part, and then reduce the holistic quality of shielding part for cooling air blows shielding part more easily, makes shielding part slope towards the direction that is close to the fan housing, reduces the cooling air and opens the required atmospheric pressure of air current passageway, and then more fully utilizes cooling air to cool off the motor.

Optionally, the inner shell is close to one side of shielding cushion has seted up the carry groove, shielding cushion with the interior bottom wall in carry groove laminating mutually.

Through adopting above-mentioned technical scheme, make the distance grow between shielding part and the fan housing, the cooling wind blows shielding part, will make shielding part for the gradient of connecting portion bigger for the cooling wind that the air current passageway unit time flowed into in the wind chamber is more.

Optionally, an end surface of the shielding soft cushion, which is far away from the air inlet, is an arc surface.

By adopting the technical scheme, the mass of the shielding part is reduced, so that the cooling air blows the shielding soft cushion, namely, under the condition that the working rotation speed of the motor is lower, the cooling air can still open the air flow channel.

Optionally, the lateral wall of inner housing is connected with a plurality of archs, is formed with the direction passageway between two adjacent archs, the direction passageway with the exhaust hole is linked together.

Through adopting above-mentioned technical scheme, after the cooling air enters into the direction passageway, the flow direction of cooling air will be restricted by two adjacent archs to cooling air circulation speed and circulation efficiency have been improved, and then the radiating effect has been increased.

In summary, the present application includes at least one of the following beneficial effects:

1. through the air flow channel which enables the inner shell and the driving cavity to be communicated with each other, when the motor works, cooling air at the air inlet can flow into the air cavity and then flow to the air suction inlet through the exhaust hole, meanwhile, a shielding soft cushion which is used for enabling the air flow channel to circulate unidirectionally is arranged between the inner shell and the air cover, so that the air flow channel can be kept closed when the motor does not work, water vapor at the air suction inlet is prevented from entering the driving cavity, and the working efficiency of the motor is improved on the premise that the water resistance and the heat dissipation of the motor are not affected;

2. one end face of the shielding soft cushion far away from the air inlet is set to be an arc surface, so that the quality of the shielding soft cushion can be reduced, cooling air can conveniently blow the shielding soft cushion, and then the air flow channel is opened.

Drawings

FIG. 1 is a schematic structural diagram of an embodiment of the present application;

fig. 2 is a schematic structural diagram for showing a connection relationship between a driving cavity and an inner housing in an embodiment of the present application;

FIG. 3 is a schematic structural view showing a connection relationship between a shielding cushion and an inner housing according to an embodiment of the present disclosure;

fig. 4 is a schematic structural diagram for showing a connection relationship between a protrusion and a lower housing in the embodiment of the present application.

In the figure: 1. an inner housing; 11. an upper housing; 12. a lower housing; 13. placing a channel; 131. an air suction port; 132. an air inlet; 14. an exhaust hole; 15. a second vent hole; 16. a mounting part; 161. a clamping groove; 17. carry slots; 18. a protrusion; 181. a guide channel;

2. a fan housing; 21. a wind chamber;

3. a drive cavity; 31. a working chamber; 32. a first vent;

4. an air flow channel;

5. a shielding soft cushion; 51. a connection part; 511. disassembling and assembling the raised strips; 52. a shielding part; 521. an auxiliary groove.

Detailed Description

The present application is described in further detail below in conjunction with figures 1-4.

The embodiment of the application discloses a pressure release waterproof construction of wet dual-purpose motor futilely. Referring to fig. 1 and 2, the pressure release waterproof structure of the wet and dry motor comprises an inner housing 1 and a fan housing 2 sleeved on the outer side wall of the inner housing 1, wherein the inner housing 1 is divided into an upper housing 11 and a lower housing 12 in the embodiment for easy assembly. After the upper casing 11 and the lower casing 12 are mounted, the fan housing 2 is fixedly connected with the inner casing 1. The inner housing 1 is spaced from the hood 2 to form a chamber 21 through which air flows. The inner shell 1 is provided with a placement channel 13 from top to bottom, so that part of elements required by part of the motor can be conveniently placed; one end of the placement channel 13 is an air suction inlet 131, the other end of the placement channel 13 is an air inlet 132, and an exhaust hole 14 communicated with the air cavity 21 is formed in one side, close to the air suction inlet 131, of the inner side wall of the inner shell 1.

Referring to fig. 2, a driving cavity 3 for placing elements such as a stator core and a rotor is connected to an inner wall of one side of the inner housing 1 far from the air suction port 131, a working cavity 31 for placing a stator impeller and a movable impeller is formed between the driving cavity 3 and the inner housing 1, and the working cavity 31 is close to the air suction port 131. After the components to be mounted in the inner housing 1 are mounted, the air inlet 132 and the air inlet 131 are separated by the components in the inner housing 1, and the air flow entering from the air inlet 132 cannot flow into the air inlet 131.

Referring to fig. 2, three first ventilation holes 32 which are centrally symmetrical with respect to the axis of the inner housing 1 are formed in the side wall of the driving cavity 3 in a penetrating manner, second ventilation holes 15 which are coaxial with and communicated with the first ventilation holes 32 are formed in the outer side wall of the inner housing 1, the second ventilation holes 15 are taper holes, the diameter of the small diameter end of each second ventilation hole 15 is equal to that of the first ventilation holes 32, and the end, far away from the first ventilation holes 32, of each second ventilation hole 15 is a large diameter end, so that air flow is convenient to diffuse; the first ventilation holes 32 and the second ventilation holes 15 together form an air flow passage 4 for facilitating ventilation. When the motor works, the movable impeller rotates at a high speed, negative pressure is generated at the air suction inlet 131 to form vacuum, cooling air above the air inlet 132 is sucked to the air suction inlet 131, the cooling air is air in the use environment of the motor, firstly, the cooling air enters the driving cavity 3 from the air inlet 132, then enters the air cavity 21 through the air flow channel 4 to cool the inner shell 1 and the air cover 2 which generate heat, finally, the cooling air flows into the air suction inlet 131 through the air outlet 14 to flow out of the inner shell 1, and the cooling air above the air inlet 132 is used for continuously radiating the motor in a circulating mode.

Referring to fig. 2, a shielding cushion 5 for unidirectional circulation of the air flow channel 4 is arranged between the inner housing 1 and the fan housing 2, the circulation direction is from the driving cavity 3 to the fan housing 2, the shielding cushion 5 in the embodiment is made of rubber, so that the air flow can blow and deform the shielding cushion 5, and the air flow channel 4 is communicated with the fan housing 21. When the motor does not work, water vapor remains at the air suction port 131, and after the air flow brings the water vapor into the air cavity 21, the air flow channel 4 is closed by the shielding cushion 5, so that the water vapor cannot enter the driving cavity 3, and the water vapor is prevented from damaging the internal structure of the motor. When the motor works, the air flow channel 4 is communicated with the air cavity 21, little water vapor can flow into the driving cavity 3 through the air flow channel 4, but the heat generated by the motor during the operation can evaporate the water vapor.

Referring to fig. 2, the shielding cushion 5 includes a connection portion 51 and a shielding portion 52 connected to the connection portion 51, the connection portion 51 being for connection with the inner case 1; one side of the shielding part 52, which is close to the inner shell 1, is attached to the inner shell 1 and is used for closing the second ventilation hole 15, namely closing the air flow channel 4, and the thickness of the shielding part 52 is smaller than that of the connecting part 51, so that the shielding part 52 is convenient for air flow to blow the shielding part 52, the shielding part 52 is bent relative to the connecting part 51, and even if the shielding part 52 is inclined towards the direction close to the fan housing 2, the air flow channel 4 is communicated with the fan cavity 21; the portion of the inner case 1 for mounting the shielding cushion 5 is a mounting portion 16. In order to facilitate the installation of the shielding cushion 5, when the inner shell 1 is designed and manufactured, the wall thickness of the installation part 16 is made to be larger than the wall thickness of other parts of the inner shell 1; when the shielding soft cushion 5 is designed, the cross section of the connecting part 51 is in a convex shape in order to further improve the convenience of installing the shielding soft cushion 5; and the side of the connecting portion 51 away from the driving cavity 3 is a convex side after the installation is completed. The end wall of the mounting portion 16 far away from the air suction port 131 is provided with a clamping groove 161 for adapting and inserting the connecting portion 51, in order to facilitate inserting and taking out the shielding cushion 5 into and from the clamping groove 161, one side of the connecting portion 51 far away from the inner shell 1 is connected with a dismounting convex strip 511, and the dismounting convex strip 511 extends out of the clamping groove 161. When the shielding cushion 5 is installed, the shielding part 52 is inserted into the clamping groove 161 until the end wall of the connecting part 51, which is far away from the shielding part 52, is parallel to the end wall of the installation part 16; when the shielding cushion 5 ages, the aged shielding cushion 5 can be taken out by shifting the dismounting convex strips 511 away from the air suction port 131.

Referring to fig. 2, when the motor is operated, the cooling air above the air inlet 132 enters the driving chamber 3 to blow the shielding part 52, and one side of the shielding part 52 close to the fan housing 2 is attached to the inner wall of the fan housing 2, so that the air flow channel 4 is communicated with the fan chamber 21. When the motor does not work, the air flow entering from the air inlet 131 flows into the air cavity 21, and the air flow blows to one side surface of the shielding part 52 close to the fan housing 2, so that the shielding part 52 is pushed towards the direction close to the driving cavity 3, the shielding part 52 is tightly attached to the inner shell 1, and the possibility that water vapor enters the driving cavity 3 is reduced. Meanwhile, in order to make the use effect of the shielding soft cushion 5 better, the thickness of the shielding soft cushion 5 can be 5 mm in practical application.

Referring to fig. 3, a carry groove 17 is formed on one side of the upper housing 11, which is close to the shielding cushion 5, and one side of the shielding cushion 5, which is close to the carry groove 17, is attached to the inner bottom wall of the carry groove 17, so that the distance between the shielding part 52 and the fan housing 2 is increased, the flow cross section between the air flow channel 4 and the fan cavity 21 is also increased, and the heat dissipation effect of cooling air on the motor is further enhanced.

Referring to fig. 2 and 4, fig. 4 is a display view of an uninstalled fan housing, the outer side wall of the lower housing 12 is connected with a plurality of protrusions 18, a guiding channel 181 is formed between two adjacent protrusions 18, which can limit the flowing direction of the air flow, enhance the heat dissipation effect, and the guiding channel 181 is communicated with the air outlet 14, so that the air outlet 14 can be opened from the end wall of the inner housing 1 far away from the driving cavity 3 for making the flowing path of the cooling air longer.

Referring to fig. 3 and 4, an auxiliary groove 521 is formed on a side of the shielding portion 52 near the upper housing 11, so that the thickness of the portion of the shielding portion 52 in direct contact with the air flow can be further reduced, and the air flow can blow the shielding portion 52 conveniently, that is, when the cooling air pressure entering the air inlet 132 is smaller due to the lower rotation speed of the motor, the shielding portion 52 can still be blown to incline toward the direction near the fan housing 2, so that the air flow channel 4 flows with the air cavity 21. The end surface of the shielding part 52 far away from the air inlet 132 is an arc surface, so that the mass of the shielding part 52 is further reduced, and the shielding part 52 is conveniently blown to the fan housing 2 by air flow.

The implementation principle of the pressure release waterproof structure of the dry-wet motor provided by the embodiment of the application is as follows: starting a motor, rotating a movable impeller to generate negative pressure at an air suction opening 131, sucking cooling air above an air inlet 132 into a driving cavity 3, enabling the cooling air to flow into an air flow channel 4, then blowing a shielding cushion 5 to incline towards a direction close to a fan housing 2, enabling the air flow channel 4 to be communicated with a fan cavity 21, enabling the cooling air to enter the fan cavity 21, enabling the cooling air to flow into the air suction opening 131 through an exhaust hole 14, and finally flowing out of the motor to realize cooling of the motor; when the air flows from the air cavity 21 to the air flow channel 4, the air flow can enable the shielding cushion 5 to be tightly attached to the inner shell 1, so that the possibility that water vapor enters the driving cavity 3 when the motor is not in operation is reduced. Compared with the prior art that a load such as a fan is used for cooling the motor, the heat dissipation effect on the motor can be enhanced without increasing the load, and the energy loss can be reduced, so that the working efficiency of the motor is improved.

The foregoing are all preferred embodiments of the present application, and are not intended to limit the scope of the present application in any way, therefore: all equivalent changes in structure, shape and principle of this application should be covered in the protection scope of this application.

Claims (8)

1. The utility model provides a pressure release waterproof construction of dual-purpose motor futilely wets, includes inner housing (1) and cover are located fan housing (2) of inner housing (1) lateral wall, inner housing (1) with be formed with between fan housing (2) and supply air ventilation's wind chamber (21), inner housing (1) and from top to bottom run through and have offered place passageway (13), place the one end of passageway (13) and be inlet scoop (131), place the other end of passageway (13) and be air intake (132), the inside wall of inner housing (1) is close to one side of inlet scoop (131) seted up with exhaust hole (14) that are linked together of wind chamber (21), inner housing (1) keep away from the inner wall of one side of inlet scoop (131) is connected with and is used for placing stator core and rotor's drive cavity (3), its characterized in that: an air flow channel (4) which is communicated with the driving cavity (3) is arranged between the inner shell (1) and the driving cavity, and a shielding cushion (5) which is used for enabling the air flow channel (4) to flow unidirectionally is arranged between the inner shell (1) and the fan housing (2).

2. The pressure release waterproof structure of a dry-wet dual-purpose motor according to claim 1, wherein: the shielding soft cushion (5) is detachably connected with the inner shell (1).

3. The pressure release waterproof structure of the dry-wet dual-purpose motor according to claim 2, wherein: a clamping groove (161) used for being inserted into the shielding cushion (5) is formed in the end wall, close to the air inlet (132), of the inner shell (1).

4. The pressure release waterproof structure of a wet and dry motor according to claim 3, wherein: the shielding cushion (5) comprises a connecting part (51) and a shielding part (52) which are inserted into the clamping groove (161), the thickness of the connecting part (51) is larger than that of the shielding part (52), and the shielding part (52) is attached to the inner shell (1).

5. The pressure release waterproof structure of a wet and dry motor according to claim 4, wherein: an auxiliary groove (521) is formed in one side, close to the inner shell (1), of the shielding part (52).

6. The pressure release waterproof structure of a dry-wet dual-purpose motor according to claim 1, wherein: carry groove (17) has been seted up to one side that inner shell (1) is close to shelter from cushion (5), shelter from cushion (5) with the interior bottom wall in carry groove (17) is laminated mutually.

7. The pressure release waterproof structure of a dry-wet dual-purpose motor according to claim 1, wherein: an end face of the shielding soft cushion (5) far away from the air inlet (132) is an arc face.

8. The pressure release waterproof structure of a dry-wet dual-purpose motor according to claim 1, wherein: the outer side wall of the inner shell (1) is connected with a plurality of protrusions (18), a guide channel (181) is formed between every two adjacent protrusions (18), and the guide channel (181) is communicated with the exhaust hole (14).

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