Magnetic driving pump

Abstract

According to the technical scheme, the magnetic drive pump is characterized by comprising a motor, a pump body, an impeller, an outer magnet, an inner magnet and a drive shaft, the motor is used for driving the outer magnet to rotate, the inner magnet is arranged in the pump body, the drive shaft comprises a main shaft and an auxiliary shaft, the main shaft is connected with the inner magnet, and the auxiliary shaft is connected with the impeller; a liquid cavity is formed in the main shaft, cooling liquid is stored in the liquid cavity, the volume of the cooling liquid is smaller than the volume of the liquid cavity, and a linkage part is arranged at the upper end of the liquid cavity; the main shaft is of a concave structure, one end of the auxiliary shaft is located in the middle of the main shaft, transmission teeth meshed with each other are arranged in the middle of the main shaft and one end of the auxiliary shaft, a pressure relief opening and an expansion sleeve are arranged in the middle of the main shaft, and the expansion sleeve is arranged at the pressure relief opening. Limiting grooves are formed in the two sides of the middle of the main shaft, limiting blocks matched with the limiting grooves are arranged on the auxiliary shaft, a linkage assembly is arranged on the auxiliary shaft, the magnetic driving pump can guarantee stable movement of the driving shaft, and liquid can be conveniently used repeatedly.

Description

Technical Field

[0001] The present invention relates to a magnetic pump, and more particularly to a magnetic drive pump. Background Art

[0002] The working principle of the magnetic pump is based on the principle of magnetic coupling. It mainly consists of a drive part and a transmission part. The drive part usually consists of an electric motor and an external magnet, while the transmission part includes an internal magnet and an impeller. When the motor is started, the external magnet begins to rotate and generates a rotating magnetic field. This rotating magnetic field interacts with the internal magnet to form a magnetic coupling driving force, which is transmitted to the internal magnet. When the driving force is transmitted to the internal magnet, it acts on the impeller, causing the impeller to start rotating.

[0003] In order to avoid the wear of transmission parts during high-temperature operation of the magnetic pump, the prior art publication number is: CN114776600B, which discloses a magnetic pump. The magnetic pump is designed with a main shaft connected to the internal magnet and a secondary shaft connected to other rotating parts in the pump body. When high temperature conditions occur, the liquid in the main shaft and the secondary shaft will vaporize to increase the internal pressure, so that the main shaft and the secondary shaft are separated, thereby playing a protective role.

[0004] The above device has the following problems during use: 1. The connection between the main shaft and the secondary shaft is maintained by a spring, but during high-speed rotation, the elastic force of the spring cannot be stably maintained, causing separation between the main shaft and the secondary shaft, affecting transmission; 2. Liquid is filled in the main shaft and the secondary shaft. When the main shaft and the secondary shaft are separated, the liquid is prone to leakage, thus affecting the secondary use. Summary of the invention

[0005] In view of the deficiencies in the prior art, an object of the present invention is to provide a magnetic drive pump, which can ensure the stable movement of the drive shaft and facilitate multiple uses of liquid.

[0006] To achieve the above object, the present invention provides the following technical solution: a magnetic drive pump, comprising a motor, a pump body, an impeller, an external magnet, an internal magnet, and a drive shaft, wherein the motor is used to drive the rotation of the external magnet, the internal magnet is arranged in the pump body, one end of the drive shaft is connected to the internal magnet, and the other end is connected to the impeller; The impeller, the driving shaft, the inner magnet, the outer magnet and the motor are sequentially installed along the height direction, the driving shaft includes a main shaft and a secondary shaft, the secondary shaft is arranged at the upper end of the main shaft, the main shaft is connected to the inner magnet, and the secondary shaft is connected to the impeller; A liquid cavity is provided in the spindle, and a coolant is stored in the liquid cavity. The volume of the coolant is smaller than the volume of the liquid cavity, and a linkage part is provided at the upper end of the liquid cavity; The cross section of the main shaft is arranged in a concave structure, one end of the secondary shaft is located in the middle of the main shaft, the middle of the main shaft and one end of the secondary shaft are both provided with mutually meshing transmission teeth, the middle of the main shaft is provided with a pressure relief port and an expansion sleeve, and the expansion sleeve is arranged at the pressure relief port; Limiting grooves are arranged on both sides of the middle part of the main shaft, and limiting blocks cooperating with the limiting grooves are arranged on the secondary shaft. A linkage assembly is arranged on the secondary shaft, and when the coolant is vaporized, the linkage part and the linkage assembly are linked to separate the limiting blocks from the limiting grooves. As the coolant continues to vaporize, the expansion sleeve bulges upward, causing the secondary shaft to separate from the primary shaft.

[0007] The present invention is further configured as follows: the volume of the coolant is smaller than the volume of the liquid cavity, an expansion gap is left at the upper end of the liquid cavity, the linkage portion includes a linkage port and a linkage sleeve, the linkage port is arranged on the inner side of the main shaft and is connected to the expansion gap, and the linkage sleeve is arranged at the linkage port; When the coolant vaporizes, the linkage sleeve protrudes toward the middle of the main shaft.

[0008] The present invention is further configured as follows: the linkage parts are provided with at least two groups, and are symmetrically arranged on both sides of the main shaft; The linkage components are also provided with two groups, which are respectively provided in linkage with the linkage part.

[0009] The present invention is further configured as follows: a linkage groove is provided on the secondary shaft, the linkage assembly includes a linkage plate, a folding arm and a torsion spring, one end of the folding arm is rotatably connected to the bottom of the linkage groove through the torsion spring, and the other end is rotatably connected to the linkage plate; Guide grooves are arranged on both sides of the linkage groove, guide rods are arranged on both sides of the linkage plate, and the linkage plate is slidably connected in the guide grooves through the guide rods.

[0010] The present invention is further configured as follows: a limiting edge is provided at the notch of the linkage groove, a first magnetic attraction plate is provided on the inner side of the limiting edge, and a first magnetic attraction portion is provided on the linkage plate.

[0011] The present invention is further configured as follows: a moving groove is provided on the secondary shaft, and the limit block is slidably connected in the moving groove via a moving spring; The movable slots and the limit blocks are provided in two groups, and are respectively provided in one-to-one correspondence with the linkage components.

[0012] The present invention is further configured as follows: the limit block includes a limit portion and an abutment portion, the limit portion is used to be inserted into the limit groove, the abutment portion is located at the upper end of the limit portion, and an abutment guide surface is provided on the abutment portion. When the linkage plate moves, the linkage plate pushes the limit block to move into the moving groove through the abutment portion.

[0013] The present invention is further configured as follows: a second magnetic attraction portion is disposed on the inner sides of the two linkage plates, and a second magnetic attraction plate is disposed on the outer side of the secondary shaft.

[0014] The present invention is further configured as follows: a guide portion is provided in the pump body, and the secondary shaft passes through the guide portion and is connected to the impeller.

[0015] The present invention is further configured as follows: a guide slot is provided on the guide portion, a guide block slidably connected to the guide slot is provided on the outer side of the secondary shaft, and a guide spring is provided between the guide block and the guide slot.

[0016] To sum up, the present invention has the following beneficial effects: by meshing the transmission teeth on the secondary shaft with the transmission teeth on the main shaft, gradual transmission between the motor, external magnet, internal magnet, main shaft, secondary shaft and impeller is realized, and through the design of the limit block and the limit groove, when the main shaft and the secondary shaft are meshed for transmission, the two can provide a stable transmission effect.

[0017] When the temperature of the main shaft and the auxiliary shaft rises during the rotation process, it can be divided into three stages. When the temperature gradually rises to the first stage, the coolant vaporizes, thereby cooling the main shaft and the auxiliary shaft inside the main shaft; When the temperature further rises to the second stage, the coolant further vaporizes, causing the pressure in the liquid cavity to increase. At this time, since the volume of the coolant is smaller than the volume of the liquid cavity, a gap will be left above the liquid cavity. As the air pressure gradually increases, it will first act on the linkage part, causing the linkage part and the linkage assembly to cooperate with each other, thereby separating the limit block from the limit groove, releasing the limit effect of the secondary shaft and the main shaft; When the temperature rises to the third stage, the pressure in the liquid chamber further increases. At this time, the pressure will gradually act on the pressure relief port, causing the expansion sleeve to expand outward, thereby pushing the secondary shaft to move upward, separating the two transmission teeth, and making the main shaft approximately in an idling state, thereby avoiding the loss of rotating parts in the pump body during high-temperature operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the three-dimensional structure of a magnetic drive pump; Figure 2 is a schematic diagram of the three-dimensional structure of the drive shaft; Figure 3 A schematic diagram of the three-dimensional structure of the main axis; Figure 4 Schematic diagram of the three-dimensional structure of the secondary shaft; Figure 5 is a cross-sectional view of the secondary shaft; Figure 6 It is a schematic diagram of the three-dimensional structure in which the driving shaft and the guide part are separated; Figure 7 A cross-sectional view of the main axis.

[0019] : 1. motor; 2. pump body; 3. drive shaft; 4. main shaft; 41. liquid chamber; 42. linkage part; 421. linkage port; 422. linkage sleeve; 43. transmission tooth; 44. pressure relief port; 45. expansion sleeve; 46. limiting groove; 47. expansion gap; 5. secondary shaft; 51. limiting block; 511. limiting part; 512. abutting part; 52. linkage assembly; 521. linkage plate; 522. folding arm; 53. linkage groove; 54. limiting edge; 55. first magnetic plate; 56. moving groove; 561. moving spring; 57. guide block; 6. first magnetic part; 7. second magnetic part; 8. second magnetic plate; 9. guide part; 91. guide slide groove; 92. guide spring. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] Reference Figures 1 to 7 As shown, in order to achieve the above-mentioned purpose, the present invention provides the following technical solutions: a magnetic drive pump, comprising a motor 1, a pump body 2, an impeller, an external magnet, an internal magnet, and a drive shaft 3, wherein the motor 1 is used to drive the rotation of the external magnet, the internal magnet is arranged in the pump body 2, one end of the drive shaft 3 is connected to the internal magnet, and the other end is connected to the impeller; A base is installed at the bottom of the motor 1 and the pump body 2. The external magnet is connected to the shaft end of the motor 1. An isolation sleeve is fixed on the pump body 2. The isolation sleeve is arranged between the inner magnet and the outer magnet. The working principle of the external magnet and the inner magnet is common knowledge of magnetic pumps and will not be repeated here.

[0022] The impeller, the driving shaft 3, the inner magnet, the outer magnet and the motor 1 are sequentially installed along the height direction. The driving shaft 3 includes a main shaft 4 and a secondary shaft 5. The secondary shaft 5 is arranged at the upper end of the main shaft 4. The main shaft 4 is connected to the inner magnet, and the secondary shaft 5 is connected to the impeller. A liquid cavity 41 is provided in the spindle 4. The liquid cavity 41 stores a coolant. The volume of the coolant is smaller than the volume of the liquid cavity 41. A linkage part 42 is provided at the upper end of the liquid cavity 41. The cross section of the main shaft 4 is concave in structure, one end of the secondary shaft 5 is located in the middle of the main shaft 4, the middle of the main shaft 4 and one end of the secondary shaft 5 are both provided with mutually meshing transmission teeth 43, the middle of the main shaft 4 is provided with a pressure relief port 44 and an expansion sleeve 45, and the expansion sleeve 45 is provided at the pressure relief port 44; Limiting grooves 46 are arranged on both sides of the middle of the main shaft 4, and a limiting block 51 cooperating with the limiting groove 46 is arranged on the secondary shaft 5. A linkage assembly 52 is arranged on the secondary shaft 5. When the coolant is vaporized, the linkage part 42 and the linkage assembly 52 are linked to separate the limiting block 51 from the limiting groove 46. As the coolant continues to vaporize, the expansion sleeve 45 bulges upward, so that the secondary shaft 5 is separated from the primary shaft 4 .

[0023] The design of the present invention realizes gradual transmission among the motor 1, the external magnet, the internal magnet, the main shaft 4, the secondary shaft 5 and the impeller by meshing the transmission teeth 43 on the secondary shaft 5 with the transmission teeth 43 on the main shaft 4, and through the design of the limit block 51 and the limit groove 46, when the main shaft 4 and the secondary shaft 5 are meshed for transmission, the two can provide a stable transmission effect.

[0024] When the temperature of the main shaft 4 and the secondary shaft 5 rises during the rotation process, it can be divided into three stages. When the temperature gradually rises to the first stage, the coolant vaporizes, thereby cooling the main shaft 4 and the secondary shaft 5 inside the main shaft 4; When the temperature further rises to the second stage, the coolant further vaporizes, causing the pressure in the liquid cavity 41 to increase. At this time, since the volume of the coolant is smaller than the volume of the liquid cavity 41, a gap will be left above the liquid cavity 41. As the air pressure gradually increases, it will first act on the linkage part 42, causing the linkage part 42 to cooperate with the linkage assembly 52, thereby separating the limit block 51 from the limit groove 46, releasing the limit effect of the secondary shaft 5 and the main shaft 4. When the temperature rises to the third stage, the pressure in the liquid chamber 41 further increases. At this time, the pressure will gradually act on the pressure relief port 44, causing the expansion sleeve 45 to expand outward, thereby pushing the secondary shaft 5 to move upward, causing the two transmission teeth 43 to separate, and making the main shaft 4 approximately in an idling state, thereby avoiding the loss of rotating parts in the pump body 2 during high-temperature operation.

[0025] The present invention is further configured as follows: the volume of the coolant is smaller than the volume of the liquid cavity 41, an expansion gap 47 is left at the upper end of the liquid cavity 41, the linkage portion 42 includes a linkage port 421 and a linkage sleeve 422, the linkage port 421 is arranged on the inner side of the main shaft 4 and is connected to the expansion gap 47, and the linkage sleeve 422 is arranged at the linkage port 421; When the coolant is vaporized, the linkage sleeve 422 protrudes toward the middle of the main shaft 4 .

[0026] With the design of this structure, when the temperature is in the second stage, the gas pressure in the expansion gap 47 will gradually increase, and at this time it will act on the linkage sleeve 422 of the linkage port 421, causing the linkage sleeve 422 to expand outward, thereby linkage with the linkage assembly 52.

[0027] The coolant can be any one of gasoline, alcohol, and ether, and the appropriate type is selected according to specific usage.

[0028] The present invention is further configured as follows: at least two groups of linkage parts 42 are provided, and are symmetrically arranged on both sides of the main shaft 4; There are also two groups of linkage components 52 , which are respectively linked with the linkage parts 42 .

[0029] The design of this structure enables two groups of limit blocks 51 to be provided, thereby balancing the weight on both sides of the secondary shaft 5 and ensuring the transmission stability of the secondary shaft 5 .

[0030] The present invention is further configured as follows: a linkage groove 53 is provided on the secondary shaft 5, and the linkage assembly 52 includes a linkage plate 521, a folding arm 522 and a torsion spring, one end of the folding arm 522 is rotatably connected to the bottom of the linkage groove 53 through the torsion spring, and the other end is rotatably connected to the linkage plate 521; like Figure 4 As shown, the diameter of the rotating cavity in the middle of the main shaft 4 is larger than the diameter of the secondary shaft 5, and the linkage plate 521 protrudes outward relative to the secondary shaft 5. When the linkage sleeve 422 protrudes outward and pushes the linkage plate 521 to move into place, the linkage plate 521 is level with the secondary shaft 5.

[0031] When the linkage sleeve 422 abuts against the linkage plate 521 , the linkage plate 521 can be moved obliquely downward through the folding arm 522 and compress the torsion spring. When the linkage sleeve 422 is reset, the linkage plate 521 can be reset under the action of the torsion spring.

[0032] Furthermore, guide grooves are provided on both sides of the linkage groove 53 , guide rods are provided on both sides of the linkage plate 521 , and the linkage plate 521 is slidably connected to the guide grooves through the guide rods.

[0033] The design of this structure can improve the stability of the linkage plate 521 during its movement.

[0034] The present invention is further configured as follows: a limiting edge 54 is disposed at the slot opening of the linkage slot 53 , a first magnetic attraction plate 55 is disposed on the inner side of the limiting edge 54 , and a first magnetic attraction portion 6 is disposed on the linkage plate 521 .

[0035] like Figure 4 and Figure 5 As shown, the design of the first magnetic plate 55 and the first magnetic portion 6 can ensure that the position of the linkage plate 521 is stable when the linkage sleeve 422 is not extended, and will not move due to the rotation of the secondary shaft 5.

[0036] The present invention is further configured as follows: a moving groove 56 is provided on the secondary shaft 5, and the limit block 51 is slidably connected in the moving groove 56 via a moving spring 561; There are two groups of movable grooves 56 and limit blocks 51 , and they are respectively arranged in one-to-one correspondence with the linkage components 52 .

[0037] The limit block 51 includes a limit portion 511 and an abutment portion 512. The limit portion 511 is used to be inserted into the limit groove 46. The abutment portion 512 is located at the upper end of the limit portion 511. An abutment guide surface is provided on the abutment portion 512. When the linkage plate 521 moves, the linkage plate 521 pushes the limit block 51 to move into the movable groove 56 through the abutment portion 512.

[0038] like Figure 4 and Figure 5 As shown, when the linkage plate 521 moves downward, it can abut against the abutment portion 512, and as it moves downward gradually, the abutment portion 512 will push the limiting portion 511 to separate from the limiting groove 46, thereby achieving a contact limiting effect.

[0039] When the linkage plate 521 is reset, the limiting block 51 is extended outward under the action of the moving spring 561 , and when the limiting portion 511 is inserted into the limiting groove 46 , the limiting effect can be re-formed.

[0040] The present invention is further configured as follows: a second magnetic attraction portion 7 is disposed on the inner side of each of the two linkage plates 521 , and a second magnetic attraction plate 8 is disposed on the outer side of the secondary shaft 5 .

[0041] When the linkage plate 521 moves down to the right position, the second magnetic attraction portion 7 is aligned with the second magnetic attraction plate 8 to provide a magnetic attraction effect to prevent the linkage plate 521 from being reset.

[0042] The above-mentioned multiple magnetic attraction parts or magnetic attraction plates can be optionally designed as an electromagnetic attraction structure, and the specific structure can be selected according to the usage.

[0043] When the limiting sleeve is not in contact with the linkage plate 521 and the secondary shaft 5 is meshed with the primary shaft 4 , during the rotation of the secondary shaft 5 , the second magnetic attraction portion 7 can be separated from the second magnetic attraction plate 8 by the return torque of the torsion spring and the centrifugal force.

[0044] The present invention is further configured as follows: a guide portion 9 is provided in the pump body 2 , and the secondary shaft 5 passes through the guide portion 9 and is connected to the impeller.

[0045] The present invention is further configured as follows: a guide slot 91 is provided on the guide portion 9 , a guide block 57 slidably connected to the guide slot 91 is provided on the outer side of the secondary shaft 5 , and a guide spring 92 is provided between the guide block 57 and the guide slot 91 .

[0046] like Figure 6 As shown, the diameter length of the guide slot 91 is matched with the diameter length of the guide block 57 , which can ensure that the position of the secondary shaft 5 will not be offset during the sliding process.

[0047] In addition, the guide spring 92 is compressed during the upward movement of the secondary shaft 5. When the expansion sleeve 45 is reset, the secondary shaft 5 moves downward under the action of the guide spring 92 and gravity, so as to facilitate the re-engagement of the secondary shaft 5 and the main shaft 4.

[0048] Since the coolant is vaporized and liquefied in the liquid chamber, leakage of the coolant can be effectively avoided.

[0049] The above are only preferred embodiments of the present invention. The protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. A magnetic drive pump, comprising a motor (1), a pump body (2), an impeller, an external magnet, an internal magnet, and a drive shaft (3), wherein the motor (1) is used to drive the rotation of the external magnet, the internal magnet is arranged in the pump body (2), one end of the drive shaft (3) is connected to the internal magnet, and the other end is connected to the impeller; Its characteristics are: The impeller, the drive shaft (3), the inner magnet, the outer magnet and the motor (1) are sequentially installed in the height direction; the drive shaft (3) comprises a main shaft (4) and a secondary shaft (5); the secondary shaft (5) is arranged at the upper end of the main shaft (4); the main shaft (4) is connected to the inner magnet; and the secondary shaft (5) is connected to the impeller; A liquid cavity (41) is provided in the main shaft (4), and a cooling liquid is stored in the liquid cavity (41). The volume of the cooling liquid is smaller than the volume of the liquid cavity (41), and a linkage portion (42) is provided at the upper end of the liquid cavity (41); The cross section of the main shaft (4) is arranged in a concave structure, one end of the secondary shaft (5) is located in the middle of the main shaft (4), the middle of the main shaft (4) and one end of the secondary shaft (5) are both provided with mutually meshing transmission teeth (43), the middle of the main shaft (4) is provided with a pressure relief port (44) and an expansion sleeve (45), and the expansion sleeve (45) is arranged at the pressure relief port (44); Limiting grooves (46) are arranged on both sides of the middle of the main shaft (4), a limiting block (51) cooperating with the limiting groove (46) is arranged on the secondary shaft (5), and a linkage assembly (52) is arranged on the secondary shaft (5), and when the coolant is vaporized, the linkage part (42) and the linkage assembly (52) are linked to separate the limiting block (51) from the limiting groove (46); As the coolant continues to vaporize, the expansion sleeve (45) bulges upward, causing the secondary shaft (5) to separate from the primary shaft (4).

2. A magnetic drive pump according to claim 1, characterized in that: The volume of the coolant is smaller than the volume of the liquid cavity (41); an expansion gap (47) is left at the upper end of the liquid cavity (41); the linkage portion (42) comprises a linkage port (421) and a linkage sleeve (422); the linkage port (421) is arranged on the inner side of the main shaft (4) and is communicated with the expansion gap (47); and the linkage sleeve (422) is arranged at the linkage port (421); When the coolant is vaporized, the linkage sleeve (422) protrudes toward the middle of the main shaft (4).

3. A magnetic drive pump according to claim 2, characterized in that: The linkage parts (42) are provided in at least two groups and are symmetrically arranged on both sides of the main shaft (4); The linkage components (52) are also provided in two groups, which are respectively provided in linkage with the linkage parts (42).

4. A magnetic drive pump according to claim 3, characterized in that: The secondary shaft (5) is provided with a linkage groove (53), the linkage assembly (52) comprises a linkage plate (521), a folding arm (522) and a torsion spring, one end of the folding arm (522) is rotatably connected to the bottom of the linkage groove (53) via the torsion spring, and the other end is rotatably connected to the linkage plate (521); Guide grooves are arranged on both sides of the linkage groove (53), guide rods are arranged on both sides of the linkage plate (521), and the linkage plate (521) is slidably connected in the guide grooves via the guide rods.

5. A magnetic drive pump according to claim 4, characterized in that: The notch of the linkage groove (53) is provided with a limiting edge (54), the inner side of the limiting edge (54) is provided with a first magnetic attraction plate (55), and the linkage plate (521) is provided with a first magnetic attraction portion (6).

6. A magnetic drive pump according to claim 4, characterized in that: The secondary shaft (5) is provided with a movable groove (56), and the limit block (51) is slidably connected in the movable groove (56) via a movable spring (561); The movable grooves (56) and the limit blocks (51) are each provided in two groups, and are respectively provided in one-to-one correspondence with the linkage components (52).

7. A magnetic drive pump according to claim 6, characterized in that: The limiting block (51) comprises a limiting portion (511) and an abutting portion (512); the limiting portion (511) is used to be inserted into the limiting groove (46); the abutting portion (512) is located at the upper end of the limiting portion (511); an abutting guide surface is provided on the abutting portion (512); when the linkage plate (521) moves, the linkage plate (521) pushes the limiting block (51) to move into the moving groove (56) via the abutting portion (512).

8. A magnetic drive pump according to claim 7, characterized in that: The inner sides of the two linkage plates (521) are each provided with a second magnetic attraction portion (7), and the outer side of the secondary shaft (5) is provided with a second magnetic attraction plate (8).

9. A magnetic drive pump according to claims 1 to 8, characterized in that: A guide portion (9) is provided in the pump body (2), and the secondary shaft (5) passes through the guide portion (9) and is connected to the impeller.

10. A magnetic drive pump according to claim 9, characterized in that: The guide portion (9) is provided with a guide slot (91), the outer side of the secondary shaft (5) is provided with a guide block (57) slidably connected to the guide slot (91), and a guide spring (92) is provided between the guide block (57) and the guide slot (91).

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