CN212412988U - Heat dissipation mechanism and motor using same - Google Patents

Abstract

The utility model relates to a motor of heat dissipation mechanism and applied heat dissipation mechanism relates to the motor field, and heat dissipation mechanism is including the casing that has the cavity, the cavity of casing is used for holding with electrical apparatus and isolated with the outside air, adopt the conduction oil to fill the cavity in the casing and be full of. The heat conduction oil has higher heat conduction performance than air, and can accelerate the transfer of heat from the electric appliance to the shell, thereby playing the role of accelerating heat dissipation. In addition, the thermal expansion coefficient of the heat conduction oil is far lower than that of air, the expanded volume of the heat conduction oil after being heated is far smaller than that of the air, the requirement on the space expansion amount in the shell is low, and the shell can meet the heat conduction oil after being heated and expanded only by slight deformation.

Description

Heat dissipation mechanism and motor using same

Technical Field

The application relates to the field of motors, in particular to a heat dissipation mechanism and a motor using the same.

Background

Most electrical appliances convert electric energy into mechanical energy, but the energy conversion cannot be performed in hundreds of percent, part of the electric energy can be converted into heat energy, and components in the electrical appliances are easily damaged when being directly exposed to the outside, and are often installed in a shell.

The shell can protect the components and also can prevent the heat generated by the components from circulating with the outside. In addition, the cavity in the shell is difficult to be completely matched with the components, and the cavity in the shell often leaves certain residual spaces which are filled with air. On the one hand, the heat conducting capacity of the air is poor, and the air between the components and the shell can interfere the heat generated by the components and the shell to be transferred to the shell; on the other hand, the thermal expansion coefficient of air is large, the volume of the heated air can be changed greatly, and the air has certain harm to a well-sealed shell.

SUMMERY OF THE UTILITY MODEL

In order to improve the heat-sinking capability of heat dissipation mechanism, this application provides a motor of heat dissipation mechanism and applied heat dissipation mechanism.

In a first aspect, the present application provides a heat dissipation mechanism, which adopts the following technical scheme:

the heat dissipation mechanism comprises a shell with a cavity, wherein the cavity of the shell is used for accommodating an electric appliance and is isolated from the outside air, and the cavity is filled with heat conduction oil in the shell.

Through adopting above-mentioned technical scheme, the heat conductivility of conduction oil is higher than the air, can accelerate the heat from using electrical apparatus to the transmission of casing to play and accelerate radiating effect. In addition, the thermal expansion coefficient of the heat conduction oil is far lower than that of air, so that the pressure on the shell is limited, and the shell is not easy to damage.

Preferably, the bottom of casing has ripple section and deformation section, the deformation section is located the intermediate position of casing bottom, the ripple section is the annular and around the deformation section outside, the ripple section is wavy undulation along radial direction, and when the temperature of the conduction oil in the cavity rose, the deformation section expanded to the one side of keeping away from the casing top.

By adopting the technical scheme, after the temperature in the shell rises, the volume of the heat conduction oil is increased, and the deformation section is extruded by the heat conduction oil and then is outwards deformed to enlarge the volume of the cavity in the shell, so that the requirement of the heat conduction oil on space change is met, and the pressure of the heat conduction oil on the shell caused by thermal expansion is reduced.

Preferably, the deformation section is concave towards one side of the inner cavity of the shell.

Through adopting above-mentioned technical scheme, the conduction oil is even volume change is little after the thermal expansion, but the volume of whole conduction oil still can increase, and at this moment, the deformation section receives the extrusion of conduction oil to resume normal condition from caving in to cavity one side gradually, makes the volume grow of cavity in order to satisfy the change of the volume of conduction oil, and even when the conduction oil continues the inflation, the deformation section continues to bulge outside the cavity, helps improving the upper limit of the highest temperature that the casing is interior to allow.

In a second aspect, the present application provides a motor, which adopts the following technical solution:

the utility model provides a motor, uses heat dissipation mechanism, includes around having the mounting disc of coil, with mounting disc coaxial coupling's main shaft and annular permanent magnetism piece, the permanent magnetism piece is fixed on the inside wall of casing, installs the support on the tip that the permanent magnetism piece is close to the casing bottom, and the one end of main shaft is passed through the bearing frame and is rotated the connection on the support, and the other end of main shaft is rotated the top of connecting at the casing through the bearing equally, the mounting disc is in the inner ring of permanent magnetism piece.

By adopting the technical scheme, heat generated by the motor mainly comes from the coil after being electrified, the coil is immersed into the heat conduction oil, the heat generated by the coil is directly transferred into the heat conduction oil, the heat conduction oil transfers the heat to the inner wall of the shell with relatively low temperature, the shell exchanges heat with the outside, the overall heat dissipation performance of the motor is good, and the rise of the temperature in the shell can be effectively inhibited.

Preferably, a detection device for detecting whether the cavity leaks is arranged in the shell, and a control box for controlling the opening and closing of the whole motor is arranged outside the shell; the main shaft is a hollow shaft, a lead is connected to the output end of the detection device, the end, far away from the detection device, of the lead penetrates through the main shaft and is connected to the control box, and sealant is filled in the main shaft.

Through adopting above-mentioned technical scheme, when the sealing performance of casing goes wrong, the conduction oil reveals very easily under the casing pivoted condition, and the revealing of conduction oil not only can cause certain influence to external environment, still can disturb the use of motor, consequently need detect through detection device to timely motor that closes.

Preferably, the permanent magnet pieces are rotors of the motor, and a plurality of stirring blades are arranged in the shell and are uniformly distributed around the main shaft.

By adopting the technical scheme, the permanent magnet sheet rotates to drive the shell to rotate, the stirring blade arranged on the shell synchronously rotates, and the heat conduction oil in the shell is stirred to flow in the rotating process of the stirring blade so as to strengthen the heat transfer between the heat conduction oils.

Preferably, stirring vane installs on the casing top, stirring vane's one side is fixed on the casing, and stirring vane's opposite side is close to the surface that the mounting disc deviates from the support, stirring vane's length direction is the same with the radial direction of casing.

Through adopting above-mentioned technical scheme, the space on the casing terminal surface is big a lot on the relative casing lateral wall, is fit for stirring vane's installation, and stirring vane is along with the casing when rotating, and the centrifugal motion is done to the conduction oil of drive contact, and this part conduction oil is got rid of casing circumference lateral wall, and the conduction oil at casing center replenishes stirring vane on, strengthens the radiating effect of conduction oil.

Preferably, a plurality of through holes for heat conducting oil to pass through are formed in the support and the mounting disc.

By adopting the technical scheme, the heat conduction oil conveniently located in the second housing flows into the second housing through the through hole, the flowing amplitude of the heat conduction oil in the housing is enhanced, and the heat dissipation effect of the heat conduction oil is further enhanced.

Preferably, the permanent magnet pieces are stators of motors, a plurality of stirring blades are installed in the shell, and the stirring blades are uniformly distributed around the main shaft and fixed on the circumferential outer side wall of the main shaft.

Through adopting above-mentioned technical scheme, the main shaft drives the mounting disc and rotates, installs the synchronous rotation of stirring vane on the main shaft, and stirring vane's rotation in-process stirs the conduction oil flow in the casing to strengthen the heat transfer between the conduction oil.

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

1. the shell is filled with heat conducting oil with strong heat conductivity and low thermal expansion coefficient, so that the heat dissipation effect is enhanced, and the volume expanded after being heated is reduced;

2. the stirring blades are driven to rotate by means of the rotation of the rotor of the motor, so that heat conduction oil in the shell flows, and the heat dissipation effect is further enhanced;

3. in the assembling process, the bottom of the shell is inwards extruded to reduce the space in the cavity of the shell, and the quantity of heat conduction oil in the shell is determined on the basis, so that the heat conduction oil can have larger deformation space in subsequent work.

Drawings

Fig. 1 is a schematic overall structure diagram of an embodiment of a heat dissipation mechanism according to the present application.

Fig. 2 is an exploded view of the structure of the heat dissipation mechanism according to the present application.

Fig. 3 is a schematic structural diagram of a first housing of a first embodiment of an electric machine according to the present application.

Fig. 4 is a cross-sectional view of a first embodiment of the motor of the present application.

Fig. 5 is an enlarged view of a in fig. 4.

Fig. 6 is a structural connection diagram between the mounting plate and the spindle according to the first embodiment of the motor of the present application.

Fig. 7 is a structural connection diagram between permanent magnet pieces and a bracket of the first embodiment of the motor of the present application.

Fig. 8 is a schematic structural diagram of a second housing of the first embodiment of the motor of the present application.

Fig. 9 is a schematic structural view of a spindle of a second motor embodiment of the present application.

Description of reference numerals: 01. a housing; 011. a first housing; 0111. a corrugated section; 0112. a deformation section; 0113. a connecting section; 012. a second housing; 0121. a sleeve; 013. a gasket; 02. a seal ring; 03. mounting a disc; 04. a permanent magnet sheet; 041. a support; 05. a main shaft; 06. a bearing; 07. mechanical sealing; 08. a stirring blade; 09. a control box; 10. a detection device; 101. a reed switch; 102. a permanent magnet; 11. a through hole; 12. and (4) conducting wires.

Detailed Description

The present application is described in further detail below with reference to figures 1-9.

The embodiment of the application discloses a heat dissipation mechanism, refer to fig. 1, which comprises a shell 01, wherein a cavity is arranged in the shell 01, a sleeve 0121 is welded at one end of the shell 01, and the cavity in the shell 01 is communicated with the outside through the sleeve 0121. When the electric appliance protection device is used, an electric appliance is arranged in the shell 01, and the shell 01 protects the electric appliance. And then heat conducting oil is added into the cavity of the shell 01 through the sleeve 0121, and then a sealing element is installed in the sleeve 0121, so that the cavity of the shell 01 is isolated from the outside by the sealing element. And when the sealing element is installed, the residual space in the cavity is filled with heat conducting oil.

Referring to fig. 2 and 3, the housing 01 includes a first cover 011 and a second cover 012, and the sleeve 0121 is welded to the second cover 012. The first case 011 and the sleeve 0121 are both stainless steel, and the second case 012 is made of brass. Compared with stainless steel, brass has better heat-conducting property and extensibility. The first cover 011 is divided into a deformation section 0112, a ripple section 0111 and a connection section 0113 from the center to the outside in sequence.

The whole shape of ripple section 0111 is annular and surrounds the deformation section 0112 outside, and ripple section 0111 is wavy undulation along radial direction. With the structure of ripple section 0111 can be when deformation section 0112 receives pressure, ripple section 0111 extends, makes deformation section 0112 along the direction deformation of pressure. At normal temperature, the deformation section 0112 is sunken into the cavity, so that the space in the cavity is minimum. And when the temperature of the heat conducting oil in the cavity rises, the deformation section 0112 gradually expands towards one side far away from the top of the shell 01, so that the space in the cavity is enlarged, and a deformation space is provided for the heat conducting oil in the cavity due to thermal expansion.

The relative ripple section 0111 of linkage segment 0113 is to second housing 012 one side buckling, and one of the section 0113 of keeping away from ripple section 0111 is served and evenly offered a plurality of round holes that supply the bolt to pass along circumference. The second housing 012 is also provided with round holes corresponding to the round holes of the first housing 011, and the first housing 011 and the second housing 012 are fixed together by the cooperation of bolts and nuts. In order to enhance the sealing performance of the housing 01, a seal ring 02 is disposed between the first enclosure 011 and the second enclosure 012. With the nut being screwed on the bolt, the first and second housings 011 and 012 extrude the sealing ring 02, and the deformed sealing ring 02 plugs the gap between the first and second housings 011 and 012. In addition, in order to prevent the first housing 011 from being deformed due to a local stress when the bolt is screwed, a ring of washer 013 made of stainless steel is further sleeved on the first housing 011.

The implementation principle of a heat dissipation mechanism in the embodiment of the application is as follows: the inner cavity of the shell 01 is filled with heat conducting oil, so that air is not left in the shell 01. The heat conduction oil has higher heat conduction performance than air, and can accelerate the transfer of heat from the electric appliance to the shell 01, thereby playing the role of accelerating heat dissipation. In addition, the thermal expansion coefficient of the heat conduction oil is far lower than that of air, the volume change of the heat conduction oil is limited when the temperature with the same value is increased, and the second housing 012 can meet the requirement of the heat conduction oil on space change through deformation, so that the shell 01 can be sealed, and the corrosion of an electric appliance in the shell 01 to the outside can be reduced while the leakage of the heat conduction oil is reduced.

The embodiment of the application also discloses a motor, which applies the heat dissipation mechanism.

The first embodiment is as follows: referring to fig. 4, the magnetic motor comprises a mounting disc 03 wound with a coil, a spindle 05 coaxially connected with the mounting disc 03, a control box 09 containing components and a ring-shaped permanent magnet sheet 04, wherein the control box 09 is located outside the shell 01, the mounting disc 03 and the permanent magnet sheet 04 are both installed in the inner cavity of the shell 01, and the central axes of the mounting disc 03 and the permanent magnet sheet 04 are all on the same straight line with the central axis of the shell 01. One part of the permanent magnet sheet 04 is positioned in the first cover 011, the outer side wall of the part of the permanent magnet sheet 04 is welded on the inner wall of the second cover 012, and the other part of the permanent magnet sheet 04 is positioned in the first cover 011. The end face of the permanent magnet sheet 04 in the first housing 011 is welded with a bracket 041, and a bearing 06 is installed in the center of the bracket 041. The sleeve 0121 is also internally provided with a bearing 06, and two ends of the main shaft 05 are respectively and rotatably connected with the bearing 06 on the sleeve 0121 and the bearing 06 on the bracket 041.

Referring to fig. 4 and 6, the main shaft 05 is a hollow shaft, the end of the coil wound on the mounting disc 03 is connected with a wire 12, the wire 12 penetrates into the main shaft 05 and is connected to the control box 09 along the main shaft 05, and a user can control the on-off of the coil by controlling components in the control box 09, so that the start-stop of the whole motor is controlled. In addition, in order to avoid the influence of the external air on the sealing of the inner cavity of the shell 01, the main shaft 05 is filled with a sealant.

Referring to fig. 5, a detection device 10 for detecting whether the cavity leaks is further installed in the housing 01, and the detection device 10 may be a magnetic reed switch, a travel switch, or a switch capable of changing a signal according to a change in distance, and may be the detection device 10. Use reed switch as the example in this application, reed switch is including installing reed pipe 101 and the permanent magnet 102 of two reeds, and permanent magnet 102 is fixed on the central point that deformation section 0112 moves towards second housing 012 puts, and reed pipe 101 is in main shaft 05 and is located the tip that main shaft 05 is close to first housing 011. The reed switch 101 is also connected with a lead wire 12, and the lead wire 12 on the reed switch 101 is connected to the control box 09 along the main shaft 05. At normal temperature, the cavity of the shell 01 is in a negative pressure state, the deformation section 0112 is slightly sunken inwards, so that the permanent magnet 102 is close to the reed pipe 101, two reeds in the reed pipe 101 are in mutual contact under the action of a magnetic field, the magnetic reed switch is in a communicated state, and the control box 09 can normally control the opening and closing of the motor. When the temperature in the cavity of the shell 01 rises, the volume change of the expanded heat conduction oil is limited because the expansion coefficient of the heat conduction oil is low, the deformation section 0112 cannot be obviously deformed, and the distance between the permanent magnet 102 and the reed pipe 101 is still within the magnetic field influence range of the permanent magnet 102. Only when the sealed problem that appears of casing 01, in the outside air enters into casing 01, the expansion coefficient of air is big and lead to deformation section 0112 to appear obvious deformation, and permanent magnet 102 can't make the reed contact to the influence of tongue tube 101 again, and two reeds in the tongue tube 101 no longer contact to cut off control box 09's power supply, make the motor cut off the power supply at once, continue to reveal to the external world with the conduction oil that reduces in the casing 01.

In this embodiment, the motor is an external rotor motor, and the motor can be applied to an aerator. The housing 01 and the permanent magnet pieces 04 together form the rotor of the motor, and the end of the main shaft 05 extending out of the housing 01 from the sleeve 0121 is fixed by an external support frame. The round hole that corresponds between first housing 011 and the second housing 012 except that being used for the fastening of bolt, can also be used for the installation of oxygen-increasing machine blade, along with permanent magnet piece 04 drives the casing 01 and rotates, and the oxygen-increasing machine blade also can rotate thereupon.

In addition, referring to fig. 4 and 8, a plurality of stirring blades 08 are welded to the inner side of the top of the second housing 012, the stirring blades 08 are uniformly distributed around the bearing 06 on the second housing 012, and the length direction of the stirring blades 08 is the same as the radial direction of the second housing 012. Referring to fig. 7, the bracket 041 and the mounting disk 03 are both provided with a plurality of through holes 11 for heat conducting oil to pass through, and the through holes 11 on the bracket 041 correspond to the through holes 11 on the mounting disk 03 one to one.

The working principle of a motor in the embodiment of the application is as follows: when the motor works, the coil is electrified to generate a magnetic field and acts with the permanent magnet sheets 04. Since the main shaft 05 is fixed, the permanent magnet pieces 04 will rotate. The whole shell 01 and the permanent magnetic sheets 04 rotate together, the stirring blades 08 synchronously rotate and stir the heat conduction oil in the second housing 012 to flow to the side wall of the shell 01, and the heat conduction oil in the first housing 011 is supplemented into the second housing 012 through the through holes 11, so that the heat conduction oil forms circulation flow, and the heat transfer effect is enhanced. Meanwhile, the first housing 011 is in contact with external water, so that heat exchange can be carried out more conveniently, and the temperature in the shell 01 is controlled within a reasonable range. For a permanent magnet motor, the influence of temperature on performance is large, and the performance of the permanent magnet motor can be better exerted only when the permanent magnet motor works in a reasonable temperature range.

Example two: referring to fig. 9, the difference between this embodiment and the first embodiment is that the motor is an inner rotor motor, a spindle 05 of the motor drives the mounting disc 03 to rotate, and the permanent magnet pieces 04 and the housing 01 do not rotate. Meanwhile, a plurality of stirring blades 08 are fixed on the circumferential outer side wall of the main shaft 05, the stirring blades 08 are uniformly distributed around the main shaft 05, and the stirring blades 08 are located between the first housing 011 and the mounting disc 03. The motor of this embodiment still can use on the oxygen-increasing machine, will drive the oxygen-increasing machine blade by main shaft 05 this moment and rotate, and the casing 01 of motor is used for fixing on outside support frame.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims (9)

1. A heat dissipation mechanism, its characterized in that: the heat-conducting oil-sealed electric appliance comprises a shell (01) with a cavity, wherein the cavity of the shell (01) is used for accommodating an electric appliance and is isolated from the outside air, and the cavity is filled with heat-conducting oil in the shell (01).

2. The heat dissipation mechanism of claim 1, wherein: the bottom of casing (01) has ripple section (0111) and deformation section (0112), deformation section (0112) is located the intermediate position of casing (01) bottom, ripple section (0111) is the annular and around deformation section (0112) outside, ripple section (0111) is wavy undulation along radial direction, and when the temperature of the conduction oil in the cavity rose, deformation section (0112) expanded to one side of keeping away from casing (01) top.

3. The heat dissipation mechanism of claim 2, wherein: the deformation section (0112) is sunken towards one side of the inner cavity of the shell (01).

4. A motor to which the heat dissipation mechanism according to any one of claims 1 to 3 is applied, characterized in that: including mounting disc (03) around having the coil, main shaft (05) and annular permanent-magnet piece (04) with mounting disc (03) coaxial coupling, permanent-magnet piece (04) are fixed on the inside wall of casing (01), install support (041) on permanent-magnet piece (04) are close to the tip of casing (01) bottom, and the one end of main shaft (05) is passed through bearing (06) seat and is rotated and connect on support (041), and the other end of main shaft (05) is rotated through bearing (06) equally and is connected the top at casing (01), mounting disc (03) are in the inner ring of permanent-magnet piece (04).

5. The electric machine of claim 4, wherein: a detection device (10) for detecting whether the cavity leaks is arranged in the shell (01), and a control box (09) for controlling the opening and closing of the whole motor is arranged outside the shell (01); the spindle (05) is a hollow shaft, a lead (12) is connected to the output end of the detection device (10), the end, far away from the detection device (10), of the lead (12) penetrates through the spindle (05) and is connected to the control box (09), and the spindle (05) is filled with sealant.

6. The electric machine of claim 4, wherein: the permanent magnet pieces (04) are rotors of the motor, a plurality of stirring blades (08) are installed in the shell (01), and the stirring blades (08) are uniformly distributed around the main shaft (05).

7. The electric machine of claim 6, wherein: the stirring blade (08) is installed on the top of the shell (01), one side edge of the stirring blade (08) is fixed on the shell (01), the other side edge of the stirring blade (08) is close to the surface, away from the support (041), of the installation disc (03), and the length direction of the stirring blade (08) is the same as the radial direction of the shell (01).

8. The electric machine of claim 7, wherein: and the bracket (041) and the mounting disc (03) are provided with a plurality of through holes (11) for heat conducting oil to pass through.

9. The electric machine of claim 4, wherein: the permanent magnet pieces (04) are stators of the motor, a plurality of stirring blades (08) are installed in the shell (01), and the stirring blades (08) are uniformly distributed around the main shaft (05) and fixed on the circumferential outer side wall of the main shaft (05).

Images