Self-balancing heavy-load stainless steel magnetic drive pump

Abstract

The utility model discloses a self-balancing heavy-load stainless steel magnetic drive pump which comprises a pump body, one side of the pump body is fixedly connected with a supporting frame through bolts, one side of the supporting frame is fixedly connected with a driving motor through bolts, the pump body comprises a fixed base, the top of the fixed base is fixedly connected with a pump shell, and one side of the pump shell is fixedly communicated with a water inlet pipe. The top of the pump shell fixedly communicates with a water outlet pipe, and the side, away from the water inlet pipe, of the pump shell is fixedly connected with one side of the supporting frame through bolts. According to the scheme, the principle that the same poles repel each other, and the smaller the distance between the magnetic poles is, the larger the repulsive force is, the operation stability of the impeller is improved, friction force generated by unbalanced axial force in the operation process is avoided, the service life of the magnetic drive pump is prolonged, water flow passes through the position between the supporting cover and the isolation sleeve, and the pressure intensity of fluid at the high-flow-speed position is small; and the pressure is high at a place with slow flow speed, so that the magnetic thrust plate at one end, close to the supporting cover, of the pump shaft keeps self-balance, and the running stability of the rotating shaft is improved.

Description

Technical Field

[0001] This utility model relates to the field of stainless steel magnetic pump technology, and more specifically, to a self-balancing heavy-duty stainless steel magnetic pump. Background Technology

[0002] Stainless steel magnetic pumps have numerous advantages such as being fully sealed, leak-free, highly efficient, energy-saving, clean, environmentally friendly, low-noise, and low-vibration. They are the best choice for conveying flammable, explosive, corrosive, and valuable liquids. Magnetic pumps can also adopt heavy-duty structural designs to convey materials with high specific gravity, high viscosity, high temperature, low temperature, and other special working conditions. The main structure consists of three parts: the pump body, the magnetic coupling, and the motor. The main principle is that the motor drives the external magnetic coupling, and the magnetic field passes through the "isolation sleeve" to indirectly drive the inner rotor, thereby driving the impeller to rotate and achieving the purpose of leak-free conveying.

[0003] When existing stainless steel magnetic pumps are running, the impeller is always in a floating state because the internal pressure of the pump chamber changes with the pump parameters. Ordinary magnetic pumps only use a "thrust plate" to resist friction and forcefully block the axial force. However, when conveying materials with high specific gravity or other special working conditions, the balance of the internal axial force is easily broken due to the influence of the material, resulting in loud noise. In severe cases, it will affect the stable operation and service life of the pump. Utility Model Content

[0004] To overcome the aforementioned deficiencies of the prior art, embodiments of this utility model provide a self-balancing heavy-duty stainless steel magnetic pump to solve the problem that in existing stainless steel magnetic pumps, the internal pressure of the pump chamber changes with the pump parameters, causing the impeller to always be in a floating state. Ordinary magnetic pumps only use a "thrust plate" to resist friction and forcefully block the axial force. However, when conveying materials with high specific gravity or other special working conditions, the balance of the internal axial force is easily broken due to the influence of the material, resulting in high noise and, in severe cases, affecting the stable operation and service life of the pump.

[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a self-balancing heavy-duty stainless steel magnetic pump, including a pump body, a support frame fixedly connected to one side of the pump body by bolts, a drive motor fixedly connected to one side of the support frame by bolts, the pump body including a fixed base, a pump casing fixedly connected to the top of the fixed base, an inlet pipe fixedly connected to one side of the pump casing, an outlet pipe fixedly connected to the top of the pump casing, a side of the pump casing away from the inlet pipe fixedly connected to one side of the support frame by bolts, a fixed frame fixedly connected to the side of the pump casing away from the inlet pipe, a support cover fixedly connected to the side of the fixed frame, a connecting shaft rotatably mounted inside the fixed frame, an impeller provided at one end of the connecting shaft near the pump casing, the impeller rotatably mounted inside the pump casing, and a pump shaft rotatably mounted inside the support cover.

[0006] The drive motor is fixedly connected to an external magnetic coupling on its side. The pump casing is fixedly connected to an isolation sleeve on the side away from the water inlet pipe. One end of the isolation sleeve is fitted inside the external magnetic coupling. A rotor is fixedly connected to the outer surface of the connecting shaft away from the impeller. The rotor is rotatably installed inside the isolation sleeve.

[0007] The fixing frame includes a limiting frame, one end of which has a first rotating groove and the other end of which has a second rotating groove, and the first rotating groove and the second rotating groove are connected.

[0008] The second rotating groove has a magnetic thrust plate rotatably mounted inside, the first rotating groove has a first magnetic bushing rotatably mounted inside, the side of the first magnetic bushing near the magnetic thrust plate has a first magnet fixedly sleeved inside, and the connecting shaft is fixedly connected to one side of the first magnetic bushing.

[0009] The magnetic thrust discs are of two types, each including a second magnetic bushing. A second magnet is embedded inside the second magnetic bushing. A fixing hole is provided inside the second magnetic bushing, and a rotating shaft is fixedly connected inside the fixing hole. The two magnetic thrust discs are respectively fixedly connected to both sides of the rotating shaft and located on both sides of the pump shaft. The second magnet corresponds to the position of the first magnet and has the same magnetic poles.

[0010] The support cover has an annular frame fixedly connected to the outer surface of the side away from the pump casing. A movable ball is movably sleeved on the top of the annular frame. A support rod is fixedly connected to the bottom of the movable ball. A magnet is fixedly connected to the bottom of the support rod. A compression spring is movably sleeved on the outer surface of the support rod. The compression spring is located between the annular frame and the magnet. A support block is fixedly connected to one side inside the annular frame. The sides of the support block and the magnet are provided with corresponding inclined surfaces. The magnetic poles of the magnet near the magnetic thrust plate are the same as those of the magnetic thrust plate.

[0011] The technical effects and advantages of this utility model are as follows:

[0012] In the above scheme, the second magnet and the first magnet have the same magnetic poles, which put them in a repulsive state. This allows the first magnetic bushing and the magnetic thrust plate to rotate inside the limit frame. The end faces of the first magnetic bushing and the magnetic thrust plate will not rub against each other. By applying the principle that magnetic poles of the same polarity repel each other and that the smaller the distance between magnetic poles, the greater the repulsive force, the first magnetic bushing and the magnetic thrust plate can automatically balance the axial force generated during impeller operation. This improves the smoothness of impeller operation, avoids friction caused by axial force imbalance during operation, and extends the service life of the magnetic pump.

[0013] Water flows through the inlet pipe, passes through the impeller, and is discharged from the outlet pipe. Some water flows between the isolation sleeve and the support cover, through the inside of the support cover, and back into the impeller through the inside of the fixed frame. When the magnetic thrust plate is close to the magnet, it generates a repulsive force on the magnet, causing the magnet to rise with the support of the support block, thus moving the movable ball out of the annular frame. At this time, the water flows between the support cover and the isolation sleeve. The pressure is low where the fluid velocity is high and high where the fluid velocity is low. This maintains the self-balancing of the magnetic thrust plate at the end of the pump shaft near the support cover, improving the smoothness of the rotating shaft operation and reducing noise generation. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0015] Figure 2 This is a schematic diagram of the internal structure of the pump body of this utility model;

[0016] Figure 3 This is a schematic diagram of the water flow direction in the pump body of this utility model;

[0017] Figure 4 This is an exploded view of the structure at point A of this utility model;

[0018] Figure 5 This is a schematic diagram of the magnetic thrust plate structure of this utility model;

[0019] Figure 6 This is a schematic diagram of the structure at point B of this utility model.

[0020] The attached figures are labeled as follows: 1. Pump body; 2. Support frame; 3. Drive motor; 11. Fixed base; 12. Inlet pipe; 13. Pump casing; 14. Outlet pipe; 15. Impeller; 16. Fixed frame; 17. Support cover; 18. Connecting shaft; 19. External magnetic coupling; 110. Isolation sleeve; 111. Rotor; 112. Pump shaft; 41. Limiting frame; 42. First rotating groove; 43. Second rotating groove; 44. Magnetic thrust plate; 47. First magnetic bushing; 48. First magnet; 441. Second magnetic bushing; 442. Second magnet; 443. Fixing hole; 51. Ring frame; 52. Movable ball; 53. Support rod; 54. Compression spring; 55. Magnet block; 56. Support block. Detailed Implementation

[0021] To make the technical problems, technical solutions and advantages of this utility model clearer, a detailed description will be given below in conjunction with the accompanying drawings and specific embodiments.

[0022] As attached Figure 1 To be continued Figure 5 This utility model provides a self-balancing heavy-duty stainless steel magnetic pump, including a pump body 1. A support frame 2 is fixedly connected to one side of the pump body 1 by bolts. A drive motor 3 is fixedly connected to one side of the support frame 2 by bolts. The pump body 1 includes a fixed base 11. A pump housing 13 is fixedly connected to the top of the fixed base 11. An inlet pipe 12 is fixedly connected to one side of the pump housing 13. An outlet pipe 14 is fixedly connected to the top of the pump housing 13. The side of the pump housing 13 away from the inlet pipe 12 is fixedly connected to one side of the support frame 2 by bolts. A fixed frame 16 is fixedly connected to the side of the pump housing 13 away from the inlet pipe 12. A support cover 17 is fixedly connected to the side of the fixed frame 16. A connecting shaft 18 is rotatably installed inside the fixed frame 16. An impeller 15 is provided at one end of the connecting shaft 18 near the pump housing 13. The impeller 15 is rotatably installed inside the pump housing 13. A pump shaft 112 is rotatably installed inside the support cover 17.

[0023] Among them, the drive motor 3 is fixedly connected to the side of the external magnetic coupling 19, the pump housing 13 is fixedly connected to the side away from the water inlet pipe 12 with the isolation sleeve 110, one end of the isolation sleeve 110 is sleeved and installed inside the external magnetic coupling 19, and the connecting shaft 18 is fixedly connected to the outer surface of the end away from the impeller 15 with the rotor 111, and the rotor 111 is rotatably installed inside the isolation sleeve 110.

[0024] When the magnetic pump is working, water flows through the inlet pipe 12, passes through the impeller 15, and is discharged from the outlet pipe 14. Some water flows between the isolation sleeve 110 and the support cover 17, passes through the inside of the support cover 17, and flows back to the inside of the impeller 15 through the inside of the fixing frame 16. In addition, some water flows back between the pump casing 13 and the impeller 15.

[0025] As attached Figure 4 As shown, the fixing frame 16 includes a limiting frame 41. One end of the limiting frame 41 is provided with a first rotating groove 42, and the other end of the limiting frame 41 is provided with a second rotating groove 43. The first rotating groove 42 and the second rotating groove 43 are connected.

[0026] The second rotating groove 43 is rotatably mounted with a magnetic thrust plate 44, the first rotating groove 42 is rotatably mounted with a first magnetic bushing 47, and the side of the first magnetic bushing 47 near the magnetic thrust plate 44 is fixedly fitted with a first magnet 48. The connecting shaft 18 is fixedly connected to one side of the first magnetic bushing 47.

[0027] As attached Figure 5 As shown, there are two magnetic thrust plates 44. Each magnetic thrust plate 44 includes a second magnetic bushing 441. A second magnet 442 is embedded inside the second magnetic bushing 441. A fixing hole 443 is opened inside the second magnetic bushing 441. A rotating shaft is fixedly connected inside the fixing hole 443. The two magnetic thrust plates 44 are respectively fixedly connected to both sides of the rotating shaft and located on both sides of the pump shaft 112. The second magnet 442 corresponds to the position of the first magnet 48 and has the same magnetic poles.

[0028] By utilizing the fact that the magnetic poles of the second magnet 442 and the first magnet 48 are the same, they are in a repulsive state, causing the first magnetic bushing 47 and the magnetic thrust plate 44 to rotate inside the limiting frame 41. The end faces of the corresponding first magnetic bushing 47 and magnetic thrust plate 44 will not generate friction. By applying the principle that magnetic poles of the same polarity repel each other and that the smaller the distance between magnetic poles, the greater the repulsive force, the first magnetic bushing 47 and the magnetic thrust plate 44 are in the axial force generated when the automatic balancing impeller 15 is running.

[0029] As attached Figure 6As shown, an annular frame 51 is fixedly connected to the outer surface of the support cover 17 away from the pump housing 13. A movable ball 52 is movably sleeved on the top of the annular frame 51. A support rod 53 is fixedly connected to the bottom of the movable ball 52. A magnet block 55 is fixedly connected to the bottom of the support rod 53. A compression spring 54 is movably sleeved on the outer surface of the support rod 53. The compression spring 54 is located between the annular frame 51 and the magnet block 55. A support block 56 is fixedly connected to one side inside the annular frame 51. The sides of the support block 56 and the magnet block 55 adjacent to each other are provided with corresponding inclined surfaces. The magnetic pole of the magnet block 55 near the magnetic thrust plate 44 is the same as that of the magnetic thrust plate 44.

[0030] Since the support block 56 and the magnet block 55 are on corresponding inclined planes, and the support rod 53 is limited by the ring frame 51, when the magnetic thrust plate 44 is close to the magnet block 55, it generates a repulsive force on the magnet block 55, causing the magnet block 55 to rise under the support of the support block 56, and causing the movable ball 52 to move out of the interior of the ring frame 51. At this time, the water flows between the support cover 17 and the isolation sleeve 110, and the movable ball 52 is impacted by the water flow, reducing the water flow rate and causing the magnet block 55 to fall. This maintains the self-balancing of the magnetic thrust plate 44 at the end of the pump shaft 112 near the support cover 17, improving the smoothness of the rotating shaft operation.

[0031] The working process of this utility model is as follows:

[0032] By utilizing the fact that the magnetic poles of the second magnet 442 and the first magnet 48 are the same, they are in a repulsive state, which causes the first magnetic bushing 47 and the magnetic thrust plate 44 to rotate inside the limiting frame 41. The end faces of the corresponding first magnetic bushing 47 and magnetic thrust plate 44 will not generate friction. By applying the principle that magnetic poles of the same polarity repel each other and that the smaller the distance between magnetic poles, the greater the repulsive force, the first magnetic bushing 47 and the magnetic thrust plate 44 are in the action of the axial force generated by the automatic balancing impeller 15 during operation.

[0033] Water flows through the inlet pipe 12, passes through the impeller 15, and is discharged from the outlet pipe 14. Part of the water flows between the isolation sleeve 110 and the support cover 17, through the inside of the support cover 17, and back into the impeller 15 through the inside of the fixing frame 16. When the magnetic thrust plate 44 is close to the magnet block 55, it generates a repulsive force on the magnet block 55, causing the magnet block 55 to rise under the support of the support block 56, and causing the movable ball 52 to move out of the annular frame 51. At this time, the water flows between the support cover 17 and the isolation sleeve 110, and the movable ball 52 is impacted by the water flow, reducing the water flow rate. According to the Bernoulli energy equation P1+ρV1^2 / 2=P2+ρV^2 / 2, the pressure is low where the fluid velocity is high and high where the fluid velocity is low. This maintains the self-balancing of the magnetic thrust plate 44 at the end of the pump shaft 112 near the support cover 17, improving the smoothness of the rotating shaft operation.

[0034] Finally, the following points should be noted: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installation", "connection", and "linkage" should be interpreted broadly, and can be mechanical or electrical connections, or internal connections between two components, or direct connections. "Up", "down", "left", "right", etc. are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may change.

[0035] Secondly: The accompanying drawings of the embodiments disclosed in this utility model only involve the structures involved in the embodiments disclosed in this utility model. Other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of this utility model can be combined with each other.

[0036] Finally: The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A self-balancing heavy-duty stainless steel magnetic pump, comprising a pump body (1), wherein a support frame (2) is bolted to one side of the pump body (1), and a drive motor (3) is bolted to one side of the support frame (2), characterized in that, The pump body (1) includes a fixed base (11), a pump casing (13) is fixedly connected to the top of the fixed base (11), an inlet pipe (12) is fixedly connected to one side of the pump casing (13), an outlet pipe (14) is fixedly connected to the top of the pump casing (13), the side of the pump casing (13) away from the inlet pipe (12) is fixedly connected to one side of the support frame (2) by bolts, a fixed frame (16) is fixedly connected to the side of the pump casing (13) away from the inlet pipe (12), a support cover (17) is fixedly connected to the side of the fixed frame (16), a connecting shaft (18) is rotatably installed inside the fixed frame (16), an impeller (15) is provided at one end of the connecting shaft (18) near the pump casing (13), the impeller (15) is rotatably installed inside the pump casing (13), and a pump shaft (112) is rotatably installed inside the support cover (17). The fixing frame (16) includes a limiting frame (41), one end of the limiting frame (41) is provided with a first rotating groove (42), and the other end of the limiting frame (41) is provided with a second rotating groove (43), and the first rotating groove (42) and the second rotating groove (43) are connected. A magnetic thrust plate (44) is rotatably installed inside the second rotating groove (43), and a first magnetic bushing (47) is rotatably installed inside the first rotating groove (42). A first magnet (48) is fixedly sleeved inside the side of the first magnetic bushing (47) near the magnetic thrust plate (44), and the connecting shaft (18) is fixedly connected to one side of the first magnetic bushing (47). The number of magnetic thrust plates (44) is two. Each magnetic thrust plate (44) includes a second magnetic bushing (441). A second magnet (442) is embedded inside the second magnetic bushing (441). A fixing hole (443) is opened inside the second magnetic bushing (441). A rotating shaft is fixedly connected inside the fixing hole (443). The two magnetic thrust plates (44) are respectively fixedly connected to both sides of the rotating shaft and located on both sides of the pump shaft (112). The second magnet (442) corresponds to the position of the first magnet (48) and has the same magnetic pole.

2. The self-balancing heavy-duty stainless steel magnetic pump according to claim 1, characterized in that, An external magnetic coupling (19) is fixedly connected to the side of the drive motor (3). An isolation sleeve (110) is fixedly connected to the side of the pump casing (13) away from the water inlet pipe (12). One end of the isolation sleeve (110) is sleeved and installed inside the external magnetic coupling (19). A rotor (111) is fixedly connected to the outer surface of the end of the connecting shaft (18) away from the impeller (15). The rotor (111) is rotatably installed inside the isolation sleeve (110).

3. The self-balancing heavy-duty stainless steel magnetic pump according to claim 1, characterized in that, A ring frame (51) is fixedly connected to the outer surface of the support cover (17) away from the pump housing (13). A movable ball (52) is movably sleeved on the top of the ring frame (51). A support rod (53) is fixedly connected to the bottom of the movable ball (52). A magnet block (55) is fixedly connected to the bottom of the support rod (53). A compression spring (54) is movably sleeved on the outer surface of the support rod (53). The compression spring (54) is located between the ring frame (51) and the magnet block (55). A support block (56) is fixedly connected to one side inside the ring frame (51). The sides of the support block (56) and the magnet block (55) adjacent to each other are provided with corresponding inclined surfaces. The magnetic pole of the magnet block (55) near the magnetic thrust plate (44) is the same as that of the magnetic thrust plate (44).

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