Heat dissipation structure of magnetic drive pump

Abstract

The utility model provides a heat dissipation structure of a magnetic drive pump, and belongs to the technical field of pumps. The technical problem that heat of a frequency conversion device and heat of a motor in an existing magnetic drive pump are prone to mutual influence in the same space is solved. A heat dissipation structure of a magnetic drive pump comprises a stator assembly and a rotor assembly which are integrally formed, the stator assembly is fixed between a pump shell and a motor shell, the stator assembly and the pump shell define a pump cavity, the stator assembly and the motor shell define a frequency conversion cavity, the pump cavity and the frequency conversion cavity are not communicated, and a frequency conversion device is arranged in the frequency conversion cavity. The frequency conversion device is fixedly connected with a frequency conversion partition plate, the frequency conversion partition plate is fixedly connected with the stator assembly, a heat dissipation channel is formed between the frequency conversion partition plate and the stator assembly, and heat dissipation through holes are formed in the motor shell relative to the heat dissipation channel. According to the utility model, the heat transfer between the frequency conversion device and the motor in the magnetic drive pump is reduced, so that the heat dissipation of the whole machine is better.

Description

Technical Field

[0001] The utility model belongs to the technical field of pumps, in particular to a heat dissipation structure of a magnetic pump. Background Art

[0002] The magnetic pump includes a pump casing and a motor casing that are directly fixedly connected. The motor casing is equipped with an integrally formed rotor assembly and stator assembly. The heat in the motor is dissipated by the fluid sucked into the pump casing and then flowing through the rotor assembly and the stator assembly for heat dissipation. Generally, magnetic pumps have a frequency converter, and the frequency converter and the motor are installed together in the motor casing. However, the frequency converter is also a heat-generating device that needs heat dissipation. In addition, since the overall structure of the magnetic pump is compact, the heat of the frequency converter and the heat of the motor are easily affected by each other in the same space, affecting the performance of the entire machine. Summary of the Invention

[0003] In view of the shortcomings of the prior art, the present invention aims to provide a magnetic pump heat dissipation structure. The technical problem to be solved by the present invention is how to reduce the heat transfer between the frequency converter and the motor in the magnetic pump to achieve better heat dissipation of the entire machine.

[0004] The purpose of the utility model can be achieved through the following technical solutions: a magnetic pump heat dissipation structure, including an integrally formed stator assembly and a rotor assembly, the stator assembly is fixed between the pump casing and the motor casing, the stator assembly and the pump casing together form a pump cavity, the stator assembly and the motor casing together form a frequency conversion cavity, the pump cavity and the frequency conversion cavity are not connected to each other, a frequency conversion device is provided in the frequency conversion cavity, the frequency conversion device is fixedly connected to a frequency conversion partition, the frequency conversion partition is fixedly connected to the stator assembly, a heat dissipation channel is provided between the frequency conversion partition and the stator assembly, and a heat dissipation through-hole is provided on the motor casing relative to the heat dissipation channel.

[0005] The rotor assembly includes a rotor magnet and a rotor shield that encapsulates the rotor magnet. The rotor assembly drives the impeller to rotate within the pump chamber to achieve the suction operation of the magnetic pump. The pumped fluid can cover the rotor assembly and stator assembly and remove their heat for cooling. The pump chamber and the frequency conversion chamber are not connected to each other to prevent fluid from leaking into the frequency conversion chamber. A frequency conversion device is installed in the frequency conversion chamber. The frequency conversion device and the stator assembly are separated by a certain distance through a frequency conversion partition. The distance between the frequency conversion partition and the stator assembly forms a heat dissipation channel. Heat dissipation holes are set on the motor housing relative to the heat dissipation channel. The heat of the frequency conversion device and the heat of the motor are isolated and exchanged in the heat dissipation channel, which improves the heat dissipation effect.

[0006] Furthermore, the stator assembly includes a stator shielding sleeve and a stator assembly wrapped by the stator shielding sleeve, the stator shielding sleeve has a positioning ring seat and a plurality of positioning cylinders 1 protruding from the lower end, the frequency conversion partition has a plurality of positioning arc blocks and a plurality of positioning cylinders 2 protruding toward the stator shielding sleeve, the positioning arc blocks and the positioning ring seat are engaged, and the positioning cylinders 1 and 2 correspond one to one and are fixed by a fixing member 1. The positioning cylinders 1 and 2 and the use of the positioning arc blocks and the positioning ring seat to fix the frequency conversion partition can reduce the contact between the frequency conversion partition and the stator assembly, increase the area of the heat dissipation channel so that it can better block the heat exchange between the motor and the frequency conversion device, and achieve better heat dissipation effect. The fixing member 1 shell is preferably a bolt.

[0007] Furthermore, the stator shielding sleeve is integrally formed with a fixed sleeve, and the rotor assembly is rotatably connected to the fixed sleeve via a bearing. A reinforcing shaft is embedded in the fixed sleeve, and a fixing block 1 protrudes from the middle of the frequency conversion partition toward the stator shielding sleeve. The fixing block 1 abuts against the reinforcing shaft and is fixed by a fixing member 2. Due to the integral injection molding of the stator shielding sleeve, the reinforcing shaft can enhance its strength so that the rotor assembly can better rotate around the fixed sleeve. The reinforcing shaft extends from the bottom of the stator shielding sleeve into the fixed sleeve, and is more firmly fixed in the stator shielding sleeve after the fixing block 1 abuts against the reinforcing shaft and is fixed by the fixing member 2. The fixing block 1 is cylindrical, and the fixing member 2 is preferably a bolt.

[0008] Furthermore, the frequency converter includes a frequency converter housing and a frequency converter module disposed within the housing. The frequency converter housing comprises a cylindrical wall, a heat sink wall, and a plurality of heat sink teeth connected in sequence. The frequency converter module is located within the cylindrical wall and fixedly abuts the heat sink wall. A heat sink tooth path is defined between the heat sink teeth. A heat sink fan is disposed within the heat sink teeth, and the axis of the heat sink fan is aligned with the heat sink tooth path. The frequency converter has its own heat dissipation structure. The combination of the heat sink teeth and the heat sink fan is sufficient to dissipate heat from the frequency converter. With the frequency converter baffle, the frequency converter can dissipate heat independently, achieving even better heat dissipation.

[0009] Furthermore, the upper end of the cylindrical wall is engaged with the frequency conversion partition, and a fixing block 2 is protruded from the heat dissipation wall along the cylindrical wall, and the fixing member 3 passes through the fixing block 2 and is fixed to the frequency conversion partition.

[0010] Furthermore, the frequency conversion partition has coaxial circular ring block 1 and circular ring block 2 protruding toward the cylindrical wall, the height of circular ring block 2 is higher than circular ring block 1, and there is a groove between circular ring block 1 and circular ring block 2. The upper end of the cylindrical wall has a step portion, the upper end surface of the step portion abuts against the lower end surface of circular ring block 1, and the inner circumferential surface of the step portion abuts against the outer circumference of circular ring block 2, and a seal is provided in the groove.

[0011] Furthermore, a plurality of heat sinks protrude outward from the outer periphery of the motor housing, and the heat dissipation through hole is located between two heat sinks.

[0012] Furthermore, the bottom of the heat sink is integrally formed with an expanded housing, with axial heat dissipation holes between the expanded housing and the motor housing. The expanded housing faces the heat dissipation teeth, and the expanded housing is provided with a plurality of radial heat dissipation holes facing the heat dissipation teeth, so that the frequency converter can better dissipate heat independently.

[0013] Compared with the prior art, the technical effects of the present invention are as follows: 1. The motor has an independent heat dissipation method, and the frequency conversion device has an independent heat dissipation method. The heat of the frequency conversion device and the heat of the motor are isolated and exchanged in the heat dissipation channel through the frequency conversion partition, so that the heat dissipation effect is better. 2. The frequency conversion partition is first fixed on the stator assembly, and then the frequency conversion device is fixed on the frequency conversion partition. After the three form an integral structure, they can be fixed together with the motor housing and pump housing, which is convenient for the installation of the frequency conversion partition and the overall installation. 3. The motor housing has heat dissipation holes, axial heat dissipation holes and radial heat dissipation holes in different directions, so that the heat in the motor housing can be better discharged, and the frequency conversion device can dissipate heat better. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a cross-sectional view of the utility model.

[0015] Figure 2 This is the main view of the stator assembly, frequency conversion partition and frequency conversion device of the utility model.

[0016] Figure 3 It is a three-dimensional diagram of the present utility model.

[0017] Figure 4 It is a three-dimensional diagram of the stator assembly of the present utility model.

[0018] Figure 5 It is an exploded view of the frequency conversion partition and frequency conversion device of the utility model.

[0019] Figure 6 This is a three-dimensional diagram of the frequency conversion partition of the utility model.

[0020] Figure number marking: 1, stator assembly; 101, stator shield; 1011, positioning ring seat; 1012, positioning cylinder 1; 1013, fixed shaft sleeve; 102, stator assembly; 2, rotor assembly; 3, motor housing; 301, heat dissipation hole; 302, heat sink; 303, expanded housing; 304, axial heat dissipation hole; 305, radial heat dissipation hole; 4, pump housing; 5, pump cavity; 6, frequency conversion cavity; 7, frequency conversion device; 701, variable frequency Frequency conversion housing; 7011, cylindrical wall; 7011a, step portion; 7012, heat dissipation wall; 7013, heat dissipation teeth; 7014, heat dissipation tooth channel; 7015, fixed block 2; 702, frequency conversion module; 8, frequency conversion partition; 801, positioning arc block; 802, positioning cylinder 2; 803, fixed block 1; 804, circular ring block 1; 805, circular ring block 2; 806, groove; 9, heat dissipation channel; 10, bearing; 11, reinforced shaft. DETAILED DESCRIPTION

[0021] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0022] It should be noted that the descriptions of the present invention regarding directions such as "up", "down", "left", "right", "top", and "bottom" are all defined based on the relationship between the orientations or positions shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device must be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention.

[0023] according to Figures 1 to 6 As shown, a magnetic pump heat dissipation structure includes an integrally formed stator assembly 1 and a rotor assembly 2. The stator assembly 1 is fixed between the pump housing 4 and the motor housing 3. The stator assembly 1 and the pump housing 4 together form a pump chamber 5, and the stator assembly 1 and the motor housing 3 together form a frequency conversion chamber 6. The pump chamber 5 and the frequency conversion chamber 6 are not connected to each other. The rotor assembly 2 includes a rotor magnet and a rotor shielding sleeve that wraps the rotor magnet. The rotor assembly 2 drives the impeller to rotate in the pump chamber 5 to achieve the suction operation of the magnetic pump. The sucked fluid can cover the rotor assembly 2 and the stator assembly 1 and carry away their heat for cooling. The pump chamber 5 and the frequency conversion chamber 6 are not connected to each other to prevent the fluid from leaking into the frequency conversion chamber 6.

[0024] A frequency conversion device 7 is provided within the frequency conversion cavity 6. The frequency conversion device 7 is fixedly connected to a frequency conversion baffle 8, which is fixedly connected to the stator assembly 1. The frequency conversion device 7, the frequency conversion baffle 8, and the stator assembly 1 are fixedly formed into a whole. A heat dissipation channel 9 is provided between the frequency conversion baffle 8 and the stator assembly 1. A heat dissipation through-hole 301 is provided on the motor housing 3 relative to the heat dissipation channel 9. The stator assembly 1 includes a stator shielding sleeve 101 and a stator assembly 102 enclosed by the stator shielding sleeve 101. The rotor assembly 2 is rotatably located within the stator shielding sleeve 101. The upper end of the rotor assembly 2 is fixedly connected to the impeller, and the rotor assembly 2 drives the impeller to rotate. A frequency conversion device 7 is installed in the frequency conversion cavity 6, and the frequency conversion device 7 and the stator assembly 1 are separated by a certain distance through a frequency conversion partition 8. The distance between the frequency conversion partition 8 and the stator assembly 1 forms a heat dissipation channel 9. A heat dissipation through-hole 301 is provided on the motor housing 3 relative to the heat dissipation channel 9, so that the heat of the frequency conversion device 7 and the heat of the motor are isolated and exchanged in the heat dissipation channel 9, thereby improving the heat dissipation effect of the entire machine.

[0025] A protruding positioning ring seat 1011 and a plurality of positioning cylinders 1012 are formed at the lower end of the stator shielding sleeve 101. A plurality of positioning arc blocks 801 and a plurality of positioning cylinders 2 802 are protruding from the frequency conversion partition 8 toward the stator shielding sleeve 101. The positioning arc blocks 801 and the positioning ring seat 1011 are engaged, and the positioning cylinders 1 1012 and the positioning cylinders 2 802 correspond one to one and are fixed by a fixing member 1. The positioning cylinders 1 1012 and the positioning cylinders 2 802 and the use of the positioning arc blocks 801 and the positioning ring seat 1011 to fix the frequency conversion partition 8 can reduce the contact between the frequency conversion partition 8 and the stator assembly 1, increase the area of the heat dissipation channel 9 so that it can better block the heat exchange between the motor and the frequency conversion device 7, and achieve better heat dissipation effect. The fixing member 1 shell is preferably a bolt.

[0026] The stator shielding sleeve 101 is integrally molded with a fixed sleeve 1013, and the rotor assembly 2 is rotatably connected to the fixed sleeve 1013 via a bearing 10. The stator shielding sleeve 101 is integrally molded by injection molding, and a reinforcing shaft 11 is embedded in the fixed sleeve 1013. The reinforcing shaft 11 can enhance its strength, allowing the rotor assembly 2 to rotate around the fixed sleeve 1013 more effectively. The stator shielding sleeve 101 has a through hole in the middle that communicates with the interior of the fixed sleeve 1013, and the reinforcing shaft 11 passes through and is embedded in the fixed sleeve 1013. A fixing block 803 protrudes from the middle of the frequency conversion partition 8 toward the stator shielding sleeve 101. The fixing block 803 abuts against the reinforcing shaft 11 and is fixed by a second fixing member. The second fixing member is preferably a bolt.

[0027] The frequency converter 7 includes a frequency converter housing 701 and a frequency converter module 702 disposed within the housing. The housing 701 comprises a cylindrical wall 7011, a heat sink 7012, and a plurality of heat sink teeth 7013, which are connected in sequence. The frequency converter module 702 is located within the cylindrical wall 7011 and affixed to the heat sink 7012. A heat sink tooth track 7013 is located between the heat sink teeth 7013. A cooling fan is disposed within the heat sink teeth 7013, with the axis of the cooling fan aligned with the track of heat sink teeth 7013. The upper end of the cylindrical wall 7011 engages with the frequency converter baffle 8. A second fixing block 7015 protrudes from the heat sink 7012 along the cylindrical wall 7011. A third fixing member passes through the second fixing block 7015 and is secured to the frequency converter baffle 8. The frequency conversion baffle 8 projects coaxially toward the cylindrical wall 7011 with an annular block 1 804 and an annular block 2 805. The annular block 2 805 is taller than the annular block 1 804, and a groove 806 is defined between the annular blocks 1 804 and 805. The upper end of the cylindrical wall 7011 has a stepped portion 7011a, the upper end surface of which abuts the lower end surface of the annular block 1 804, and the inner circumference of which abuts the outer circumference of the annular block 2 805. A seal is provided within the groove 806. The frequency conversion device 7 has its own heat dissipation structure. The combination of the heat dissipation teeth 7013 and the cooling fan is sufficient to dissipate heat from the frequency conversion device 7. With the help of the frequency conversion baffle 8, the frequency conversion device 7 can dissipate heat independently, achieving even better heat dissipation.

[0028] The motor housing 3 has several heat sinks 302 protruding outward from its periphery, with heat dissipation holes 301 located between two heat sinks 302. An expanded housing 303 is integrally formed at the bottom of the heat sink 302. Axial heat dissipation holes 304 are defined between the expanded housing 303 and the motor housing 3. The expanded housing 303 faces the heat dissipation teeth 7013 and is provided with several radial heat dissipation holes 305 that face the heat dissipation teeth 7013. The heat dissipation holes 301, axial heat dissipation holes 304, and radial heat dissipation holes 305 in the motor housing 3, arranged in different directions, effectively dissipate heat within the motor housing 3 and dissipate heat from the frequency converter 7.

[0029] The above embodiments are only preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the scope of protection defined by the claims of the present invention.

Claims

1. A magnetic pump heat dissipation structure, comprising an integrally formed stator assembly (1) and a rotor assembly (2), wherein the stator assembly (1) is fixed between a pump housing (4) and a motor housing (3), and is characterized in that: The stator assembly (1) and the pump housing (4) are enclosed to form a pump cavity (5), and the stator assembly (1) and the motor housing (3) are enclosed to form a frequency conversion cavity (6). The pump cavity (5) and the frequency conversion cavity (6) are not communicated with each other. A frequency conversion device (7) is provided in the frequency conversion cavity (6). The frequency conversion device (7) is fixedly connected to a frequency conversion partition (8). The frequency conversion partition (8) is fixedly connected to the stator assembly (1). A heat dissipation channel (9) is provided between the frequency conversion partition (8) and the stator assembly (1). A heat dissipation through hole (301) is provided on the motor housing (3) relative to the heat dissipation channel (9).

2. A magnetic pump heat dissipation structure according to claim 1, characterized in that: The stator assembly (1) comprises a stator shielding sleeve (101) and a stator assembly (102) wrapped by the stator shielding sleeve (101); a positioning ring seat (1011) and a plurality of positioning cylinders (1012) protrude from the lower end of the stator shielding sleeve (101); a plurality of positioning arc blocks (801) and a plurality of positioning cylinders (802) protrude from the frequency conversion partition (8) toward the stator shielding sleeve (101); the positioning arc blocks (801) and the positioning ring seat (1011) are engaged; the positioning cylinders (1012) and the positioning cylinders (802) correspond one to one and are fixed by a fixing member (1).

3. A magnetic pump heat dissipation structure according to claim 2, characterized in that: The stator shielding sleeve (101) is integrally formed with a fixed shaft sleeve (1013); the rotor assembly (2) is rotatably connected to the fixed shaft sleeve (1013) via a bearing (10); a reinforcing shaft (11) is embedded in the fixed shaft sleeve (1013); a fixing block 1 (803) protrudes from the middle of the frequency conversion partition (8) toward the stator shielding sleeve (101); the fixing block 1 (803) abuts against the reinforcing shaft (11) and is fixed via a fixing member 2.

4. A magnetic pump heat dissipation structure according to any one of claims 1 to 3, characterized in that: The frequency conversion device (7) comprises a frequency conversion housing (701) and a frequency conversion module (702) arranged in the frequency conversion housing (701); the frequency conversion housing (701) comprises a cylindrical wall (7011), a heat dissipation wall (7012) and a plurality of heat dissipation teeth (7013) connected in sequence; the frequency conversion module (702) is located in the cylindrical wall (7011) and fixedly abuts against the heat dissipation wall (7012); a heat dissipation tooth (7013) path is provided between the heat dissipation teeth (7013) and the heat dissipation teeth (7013); a heat dissipation fan is provided in the heat dissipation teeth (7013); and the axis of the heat dissipation fan is consistent with the heat dissipation tooth (7013) path.

5. The magnetic pump heat dissipation structure according to claim 4, characterized in that: The upper end of the cylindrical wall (7011) is engaged with the frequency conversion partition (8), and a fixing block 2 (7015) is protruded from the heat dissipation wall (7012) along the cylindrical wall (7011), and the fixing member 3 passes through the fixing block 2 (7015) and is fixed to the frequency conversion partition (8).

6. The magnetic pump heat dissipation structure according to claim 5, characterized in that: The frequency conversion partition (8) has coaxial annular block 1 (804) and annular block 2 (805) protruding toward the cylindrical wall (7011), the height of the annular block 2 (805) is higher than the annular block 1 (804), and a groove (806) is provided between the annular block 1 (804) and the annular block 2 (805). The upper end of the cylindrical wall (7011) has a step portion (7011a), the upper end surface of the step portion (7011a) abuts against the lower end surface of the annular block 1 (804), the inner circumference of the step portion (7011a) abuts against the outer circumference of the annular block 2 (805), and a sealing member is provided in the groove (806).

7. The magnetic pump heat dissipation structure according to claim 4, characterized in that: A plurality of heat sinks (302) protrude outward from the outer periphery of the motor housing (3), and the heat dissipation through hole (301) is located between two heat sinks (302).

8. The magnetic pump heat dissipation structure according to claim 7, characterized in that: An enlarged shell (303) is integrally formed at the bottom of the heat sink (302), an axial heat dissipation hole (304) is provided between the enlarged shell (303) and the motor housing (3), the enlarged shell (303) is opposite to the heat dissipation teeth (7013), and a plurality of radial heat dissipation holes (305) are provided on the enlarged shell (303) and are opposite to the heat dissipation teeth (7013).

Images