Magnetic drive pump with good heat dissipation performance of bearing assembly on pump shaft

Abstract

The magnetic drive pump comprises a pump body, the pump shaft, an impeller, an inner magnetic rotor, an isolation sleeve, an outer magnetic rotor, an outer magnetic shaft and a suspension body, a pump cavity is formed in the pump body, a first pump cover and the suspension body are sequentially installed at the right end of the pump body, and a liquid inlet communicated with the pump cavity in the pump body is formed in the left end of the pump body. A liquid outlet communicated with a pump cavity in the pump body is formed in the peripheral side of the pump body, the outer magnetic rotor is rotationally installed in the suspension body through an outer magnetic shaft, an isolation sleeve located in the outer magnetic rotor is further fixedly arranged on the right side face of the first pump cover, an inner magnetic rotor located in the isolation sleeve is fixedly installed at the right end of the pump shaft, and the inner magnetic rotor and the outer magnetic rotor are coaxially arranged. A flow guide assembly is arranged in the liquid inlet and provided with a second groove body with an opening facing the right end, the left end of the pump shaft is rotationally installed in the second groove body in the flow guide assembly through a first bearing assembly, and the middle of the pump shaft penetrates through and is rotationally installed in a center hole of the first pump cover through a second bearing assembly.

Description

Technical Field

[0001] The utility model relates to the technical field of magnetic pumps, in particular to a magnetic pump with a bearing assembly on a pump shaft having good heat dissipation performance. Background Art

[0002] The magnetic pump is a fluid conveying machine, which consists of an outer magnetic rotor, an inner magnetic rotor and a non-magnetic isolation sleeve. When the motor drives the outer magnetic rotor to rotate, the magnetic field can penetrate the air gap and non-magnetic materials, driving the inner magnetic rotor connected to the impeller to rotate synchronously, realizing contactless synchronous transmission of power, and converting the dynamic sealing structure that is prone to leakage into a static sealing structure with zero leakage. Since the pump shaft and the inner magnetic rotor are completely enclosed by the pump body and the isolation sleeve, the "running, bubbling, dripping, and leaking" problems are completely solved, eliminating the safety hazards of flammable, explosive, toxic, and harmful media leaking through the pump seal in industries such as oil refining and chemical industry. Therefore, magnetic pumps are increasingly favored by various industries.

[0003] At present, most magnetic pumps used to transport liquid materials include a pump cover, a pump body, an isolation sleeve, an outer magnetic rotor and an inner magnetic rotor. The pump cover is installed on the front port of the pump body, and a suspension body is installed at the rear port of the pump body. The pump cover and the inner cavity of the pump body are assembled to form a pump chamber for installing an impeller. A pump shaft located in the front and rear directions is installed inside the pump chamber, the impeller is installed at the front end of the pump shaft, and the rear end of the pump shaft is installed on the rear end of the pump body or on the isolation sleeve through a bearing assembly. For example, the Chinese utility model patent with patent application number 2017213212318 discloses a high-temperature heat-insulating magnetic pump, including a pump body, a suspension body, an impeller, a pump shaft, an inner magnetic component, an outer magnetic component, an isolation sleeve, an outer magnetic shaft and a motor. The outer magnetic component is rotatably mounted inside the suspension body through the outer magnetic shaft, the outer magnetic shaft is connected to the motor by transmission, the isolation sleeve is installed in the cavity formed by the pump body and the suspension body, one end of the pump shaft is fixed on the isolation sleeve, the other end of the pump shaft is fixed to the pump body through the pump shaft bracket, the impeller is rotatably mounted on the pump shaft, and the inner magnetic component is fixed to the tail of the impeller; the pump body is provided with a liquid inlet and a liquid outlet, and a heat-insulating cavity is provided on the periphery of the liquid inlet. The problems with the magnetic pump of this structure are:

[0004] (1) Both bearing assemblies are installed at the rear end of the pump shaft. When the magnetic pump is conveying materials, the high-speed rotation and friction between the rear end of the pump shaft and the two bearing assemblies generate a large amount of heat, which causes the bearing assemblies to be easily damaged due to overheating. Frequent inspection and replacement of the bearing assemblies are required.

[0005] (2) When used to transport alkali solution or mortar, the solid matter in the mortar or the crystallized matter precipitated from the alkali solution will enter the gap of the bearing assembly, causing the bearing assembly to wear quickly, further accelerating the maintenance and replacement frequency of the bearing assembly.

[0006] (3) When used to transport slurries with high solid content such as mortar, it is easy for the pump body, cover body, impeller and other components to be severely worn on the sides that contact the slurry. The frequency of maintenance and replacement of each component is high, and the overall service life of the magnetic pump is short. Summary of the invention

[0007] The purpose of the utility model is to overcome the defects existing in the prior art and provide a magnetic pump with good heat dissipation performance of the bearing assembly on the pump shaft. By installing the bearing assembly 1 for supporting the left end of the pump shaft on the guide assembly inside the liquid inlet, the slurry flowing through the inside of the liquid inlet can take away the heat on the bearing assembly 1 in time, so as to avoid damage caused by excessive temperature of the bearing assembly 1. Compared with the traditional magnetic pump, in which the bearing assembly for supporting the pump shaft is centrally installed at the rear end of the pump shaft, the heat generated by the bearing assembly 2 can also be timely discharged through the pump cover 1 and the pump shaft, so as to extend the maintenance period of the bearing assembly 1 and the bearing assembly 2. The overall structural design is simple, the preparation and implementation feasibility is high, and the practicability is strong.

[0008] To achieve the above-mentioned purpose, the technical solution of the utility model is to design a magnetic pump with good heat dissipation performance of the bearing assembly on the pump shaft, including a pump body, a pump shaft, an impeller, an inner magnetic rotor, an isolating sleeve, an outer magnetic rotor, an outer magnetic shaft and a suspension body. The pump body has a pump cavity inside, and a pump cover and a suspension body are installed in sequence on the right end of the pump body. The left end of the pump body has a liquid inlet that is connected with the internal pump cavity, and the outer peripheral side of the pump body is provided with a liquid outlet that is connected with the internal pump cavity. The outer magnetic rotor is rotatably installed in the interior of the suspension body through the outer magnetic shaft, and the right side surface of the pump cover is also fixed with an isolating sleeve located inside the outer magnetic rotor. The right end of the pump shaft is fixedly installed with an inner magnetic rotor located inside the isolating sleeve, and the inner magnetic rotor is coaxially arranged with the outer magnetic rotor. The liquid inlet has a guide component inside, and the guide component has a slot body two with an opening toward the right end. The left end of the pump shaft is rotatably installed in the slot body two on the guide component through a bearing component one, and the middle part of the pump shaft passes through the bearing component two and is rotatably installed on the center hole of the pump cover one.

[0009] The utility model discloses a magnetic pump with good heat dissipation performance of the bearing assembly on the pump shaft. The bearing assembly 1 for supporting the left end of the pump shaft is installed on the guide assembly inside the liquid inlet, so that the slurry flowing through the liquid inlet can take away the heat on the bearing assembly 1 in time, and avoid the bearing assembly 1 being damaged due to excessive temperature. Compared with the traditional magnetic pump, in which the bearing assembly for supporting the pump shaft is centrally installed at the rear end of the pump shaft, the heat generated by the bearing assembly 2 can also be timely discharged through the pump cover 1 and the pump shaft, thereby extending the maintenance period of the bearing assembly 1 and the bearing assembly 2. The overall structural design is simple, the preparation and implementation feasibility is high, and the practicability is strong.

[0010] Preferably, the impeller includes an impeller body, main blades, and auxiliary blades. The impeller body has a disc-shaped structure, and there is a mounting hole in the center of the impeller body. A number of main blades are evenly distributed circumferentially on the material-facing side of the impeller body, and the main blades are arc-shaped structures bent in the same rotation direction. A number of auxiliary blades are evenly distributed circumferentially on the material-backing side of the impeller body. The main blades located on the material-facing side of the impeller body are designed as arc-shaped structures, so that vortex flow is more easily generated in the pump chamber, improving the working efficiency of the magnetic pump; at the same time, auxiliary blades are provided on the material-backing side of the impeller body, which can play a role in pressure reduction and isolation, reduce the axial force on the impeller, prevent solid particles in the slurry from entering the inside of the isolation sleeve and causing blockage and wear, and play a role in dynamic sealing, enabling the magnetic pump of the present utility model to be used for transporting alkaline liquids or mortar.

[0011] A further preferably technical solution is that the guiding component includes a conical cap with the tip facing the material-facing side. The second groove body is located inside the conical cap. A number of guiding wing plates are radially and spacedly distributed on the outer peripheral side of the conical cap, and the end of the guiding wing plate away from the conical cap is fixed on the inner peripheral side wall of the liquid inlet. The guiding component can effectively reduce the eddy current and vibration generated when the liquid inlet passes through the liquid material, thereby reducing the working noise of the magnetic pump, and helping to improve the working efficiency and working stability of the magnetic pump.

[0012] A further preferably technical solution is that the first bearing assembly includes a first shaft sleeve, a first sliding bearing, and a first guide sleeve. The first guide sleeve is fixedly installed by embedding in the second groove body on the guiding component. The first shaft sleeve is sleeved and fixed on the left end of the pump shaft. The first sliding bearing is sleeved and installed outside the first shaft sleeve, and the first sliding bearing is embedded inside the first guide sleeve;

[0013] There is a first groove body with an opening facing the left end in the middle of the first pump cover. The second bearing assembly includes a second shaft sleeve, a second sliding bearing, and a second guide sleeve. The second guide sleeve is fixedly installed by embedding in the first groove body on the first pump cover. The second shaft sleeve is sleeved and fixed on the middle of the pump shaft. The second sliding bearing is sleeved and installed outside the second shaft sleeve, and the second sliding bearing is fixedly installed by embedding inside the second guide sleeve. The structures of the first bearing assembly and the second bearing assembly are simple, and the installation method of the pump shaft is ingenious and reasonable, ensuring that the pump shaft and the impeller rotate smoothly and at high speed during the operation of the magnetic pump; the guide sleeve helps to improve the convenience of disassembly or installation of the bearing assembly.

[0014] A further preferably technical solution is that the first bearing assembly includes a first shaft sleeve and a first sliding bearing. The first shaft sleeve is sleeved and fixed on the left end of the pump shaft. The first sliding bearing is sleeved and installed outside the first shaft sleeve, and the first sliding bearing is fixedly installed by embedding in the second groove body on the guiding component;

[0015] The middle part of the first pump cover has a first groove body with an opening facing the left end. The second bearing assembly includes a second shaft sleeve and a second sliding bearing. The second shaft sleeve is sleeved and fixed in the middle of the pump shaft. The second sliding bearing is sleeved and installed outside the second shaft sleeve, and the second sliding bearing is embedded and fixed inside the first groove body on the first pump cover. The structural designs of the first bearing assembly and the second bearing assembly are simple, and the installation method of the pump shaft is ingenious and reasonable, ensuring that the pump shaft and the impeller can rotate smoothly and at high speed during the operation of the magnetic pump.

[0016] A further preferred technical solution is that there is also a second pump cover. The second pump cover is installed at the left end of the pump body, and the liquid inlet is located on the second pump cover. When a failure occurs in the first bearing assembly, only the second pump cover needs to be disassembled to repair the first bearing assembly, which helps to improve the repair efficiency of the first bearing assembly.

[0017] A further preferred technical solution is that wear-resistant layers are die-cast on the inner side surface of the pump body, the left and right side surfaces of the first pump cover, the inner wall surface of the central hole, the side surface of the second pump cover facing the pump chamber, the outer side surface of the impeller, the outer side surface of the inner magnetic rotor, the outer side surface of the guide vane, and the outer side surface of the conical cap. The wear-resistant layer improves the wear resistance of the contact surfaces of each component with the slurry, helps to extend the repair cycle and service life of each component of the magnetic pump, so that the magnetic pump of the present utility model can be used to transport slurries with a high solid content such as mortar.

[0018] A further preferred technical solution is that a first limit ring is embedded and fixed at the left end of the mounting hole on the impeller main body, and a second limit ring is embedded and fixed at the right end. A limit baffle is provided at the left end of the pump shaft. The left end of the first shaft sleeve abuts against the right end surface of the limit baffle. The left end of the impeller main body abuts tightly against the right end of the first shaft sleeve and the right end of the first sliding bearing through the first limit ring. The right end of the impeller main body abuts tightly against the left end of the second shaft sleeve and the left end of the second sliding bearing through the second limit ring. The right end of the second shaft sleeve passes through the central hole on the first pump cover and abuts against the left end surface of the inner magnetic rotor. A locking nut is screwed and installed at the right end of the pump shaft. The first limit ring abuts against the first bearing assembly, and the second limit ring abuts against the second bearing assembly, effectively preventing the impeller from moving axially on the pump shaft and ensuring the installation stability of the impeller on the pump shaft.

[0019] A further preferred technical solution is that the material of the wear-resistant layer and the material of the isolation sleeve are both one of PEEK, ceramics, silicon carbide, and polytetrafluoroethylene; the first limit ring and the second limit ring are both one of alloy tool steel, high-speed steel, and cemented carbide; the material of the inner magnetic rotor is one of samarium or cobalt. The materials selected for the wear-resistant layer have good wear resistance, ensuring that each component has good wear resistance; the materials selected for the limit rings have good wear resistance, ensuring long-term stability when the impeller is fixedly installed on the pump shaft; samarium and cobalt have good high-temperature resistance, enabling the magnetic pump of the present utility model to be used to transport high-temperature alkaline materials.

[0020] A further preferred technical solution is that the external magnetic rotor is fixed to the left end of the external magnetic shaft by fastening screws and external magnetic gaskets, the external magnetic shaft is installed on the suspension body through bearing assembly three, and a bearing cover is provided on the outer side of the right end of the suspension body.

[0021] The advantages and beneficial effects of the utility model are:

[0022] 1. The utility model provides a magnetic pump with good heat dissipation performance of the bearing assembly on the pump shaft. The bearing assembly 1 for supporting the left end of the pump shaft is installed on the guide assembly inside the liquid inlet, so that the slurry flowing through the liquid inlet can take away the heat on the bearing assembly 1 in time, avoiding damage due to excessive temperature of the bearing assembly 1. Compared with the traditional magnetic pump, in which the bearing assembly for supporting the pump shaft is centrally installed at the rear end of the pump shaft, the heat generated by the bearing assembly 2 can also be timely discharged through the pump cover 1 and the pump shaft, thereby extending the maintenance period of the bearing assembly 1 and the bearing assembly 2; the overall structural design is simple, the preparation and implementation feasibility is high, and the practicability is strong.

[0023] 2. The main blades on the material-facing side of the impeller body are designed to be an arc-shaped structure, which makes it easier to generate vortex flow in the pump chamber and improve the working efficiency of the magnetic pump; at the same time, auxiliary blades are arranged on the material-back side of the impeller body, which can play a role in decompression and isolation, reduce the axial force of the impeller, prevent solid particles in the slurry from entering the interior of the isolation sleeve and causing blockage and wear, and play a dynamic sealing role, so that the magnetic pump of the utility model can be used to transport alkaline liquids or mortar.

[0024] 3. The flow guide component can effectively reduce the eddy current and vibration generated when the liquid flows through the liquid inlet, thereby reducing the working noise of the magnetic pump and helping to improve the working efficiency and working stability of the magnetic pump.

[0025] 4. The structural design of bearing assembly 1 and bearing assembly 2 is simple, and the pump shaft installation method is ingenious and reasonable, ensuring that the pump shaft and impeller can rotate smoothly and at high speed when the magnetic pump is operating; the guide sleeve helps to improve the convenience of disassembly or installation of the bearing assembly.

[0026] 5. The wear-resistant layer improves the wear resistance of the contact surface between each component and the slurry, which helps to extend the maintenance cycle and service life of each component of the magnetic pump, so that the magnetic pump of the utility model can be used to transport slurries with high solid content such as mortar.

[0027] 6. Limiting ring 1 abuts against bearing assembly 1, and limiting ring 2 abuts against bearing assembly 2, which effectively prevents the impeller from moving on the pump shaft and ensures the installation stability of the impeller on the pump shaft.

[0028] 7. The material selected for the wear-resistant layer has good wear resistance, ensuring good wear resistance of each component; the material selected for the limit ring has good wear resistance, ensuring long-term stability when the impeller is fixedly installed and used on the pump shaft; samarium and cobalt have good high-temperature resistance, enabling the magnetic pump of the present utility model to be used for transporting high-temperature alkaline materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 is a longitudinal sectional view of the magnetic pump with good heat dissipation performance of the bearing assembly on the pump shaft in Embodiment 1 along the pump shaft;

[0030] Figure 2 is Figure 1 the enlarged partial view at H in

[0031] Figure 3 is a schematic structural view of the material-facing side of the impeller;

[0032] Figure 4 is a schematic structural view of the non-material-facing side of the impeller;

[0033] Figure 5 is a longitudinal sectional view of the magnetic pump with good heat dissipation performance of the bearing assembly on the pump shaft in Embodiment 2 along the pump shaft;

[0034] Figure 6 is Figure 5 the enlarged partial view at S in

[0035] In the figures: 1. Pump body; 2. First pump cover; 3. Second pump cover; 4. Pump shaft; 5. Impeller; 6. First bearing assembly; 7. Second bearing assembly; 8. Inner magnetic rotor; 9. Isolation sleeve; 10. Outer magnetic rotor; 11. Outer magnetic shaft; 12. Suspension body; 13. Third bearing; 14. Fourth bearing; 15. Flow guiding assembly; 16. Leg; 17. Bearing gland; 1-1. Liquid inlet; 1-2. Liquid outlet; 1-3. Pump chamber; 2-1. First groove body; 4-1. Limit baffle; 4-2. Locking nut; 4-3. Sealing cover; 5-1. Impeller main body; 5-2. Main blade; 5-3. Auxiliary blade; 5-4. First limit ring; 5-5. Second limit ring; 6-1. First shaft sleeve; 6-2. First sliding bearing; 6-3. First guide sleeve; 7-1. Second shaft sleeve; 7-2. Second sliding bearing; 7-3. Second guide sleeve; 11-1. Outer magnetic gasket; 12-1. Straight pipe; 12-2. Oil filling port; 15-1. Conical cap; 15-2. Second groove body; 15-3. Flow guiding wing plate; A. Wear-resistant layer; B. First annular eaves; C. Second annular eaves. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0036] The following combines the drawings and embodiments to further describe the specific embodiments of the present utility model. The following embodiments are only used to more clearly illustrate the technical solutions of the present utility model and cannot be used to limit the protection scope of the present utility model.

[0037] Example 1

[0038] As Figures 1 to 4 shown, the utility model is a magnetic pump with good heat dissipation performance of the bearing assembly on the pump shaft, which includes a pump body 1, a pump shaft 4, an impeller 5, an inner magnetic rotor 8, a isolation sleeve 9, an outer magnetic rotor 10, an outer magnetic shaft 11 and a suspension body 12. The pump body 1 has a pump chamber 1-3 inside. A pump cover one 2 and a suspension body 12 are sequentially installed at the right end of the pump body 1. The left end of the pump body 1 has a liquid inlet 1-1 communicating with the pump chamber 1-3 inside it. A liquid outlet 1-2 communicating with the pump chamber 1-3 inside it is provided on the outer peripheral side of the pump body 1. The outer magnetic rotor 10 is rotatably installed inside the suspension body 12 through the outer magnetic shaft 11. An isolation sleeve 9 located inside the outer magnetic rotor 10 is also fixedly provided on the right side surface of the pump cover one 2. The right end of the pump shaft 4 is fixedly installed with an inner magnetic rotor 8 located inside the isolation sleeve 9, and the inner magnetic rotor 8 and the outer magnetic rotor 10 are coaxially arranged. A flow guiding component 15 is provided inside the liquid inlet 1-1. The flow guiding component 15 has a groove body two 15-2 with an opening facing the right end. The left end of the pump shaft 4 is rotatably installed inside the groove body two 15-2 on the flow guiding component 15 through a bearing assembly one 6. The middle part of the pump shaft 4 passes through and is rotatably installed on the central hole of the pump cover one 2 through a bearing assembly two 7.

[0039] Preferably, the impeller 5 includes an impeller main body 5-1, main blades 5-2 and auxiliary blades 5-3. The impeller main body 5-1 has a disc-shaped structure. There is an installation hole in the center of the impeller main body 5-1. A plurality of main blades 5-2 are circumferentially and evenly distributed on the material receiving side surface of the impeller main body 5-1, and the main blades 5-2 are arc-shaped structures bent in the same rotation direction. A plurality of auxiliary blades 5-3 are circumferentially and evenly distributed on the back material side surface of the impeller main body 5-1.

[0040] Further preferably, the flow guiding component 15 includes a conical cap 15-1 with a tip facing the material receiving surface side. The groove body two 15-2 is located inside the conical cap 15-1. A plurality of flow guiding wing plates 15-3 are radially and spacedly distributed on the outer peripheral side of the conical cap 15-1. One end of the flow guiding wing plate 15-3 away from the conical cap 15-1 is fixedly provided on the inner peripheral side wall surface of the liquid inlet 1-1.

[0041] Further preferably, the bearing assembly one 6 includes a shaft sleeve one 6-1, a sliding bearing one 6-2 and a guide sleeve one 6-3. The guide sleeve one 6-3 is embedded and fixedly installed inside the groove body two 15-2 on the flow guiding component 15. The shaft sleeve one 6-1 is sleeved and fixedly installed on the left end of the pump shaft 4. The sliding bearing one 6-2 is sleeved and installed outside the shaft sleeve one 6-1, and the sliding bearing one 6-2 is embedded inside the guide sleeve one 6-3;

[0042] The middle part of the first pump cover 2 has a first groove body 2-1 with an opening facing the left end. The second bearing assembly 7 includes a second bushing 7-1, a second sliding bearing 7-2, and a second guide sleeve 7-3. The second guide sleeve 7-3 is fixedly installed by embedding inside the first groove body 2-1 on the first pump cover 2. The second bushing 7-1 is fixedly sleeved on the middle part of the pump shaft 4. The second sliding bearing 7-2 is sleeved and installed outside the second bushing 7-1, and the second sliding bearing 7-2 is fixedly installed by embedding inside the second guide sleeve 7-3. Specifically, the right end of the first guide sleeve 6-3 is provided with a first annular eaves B extending towards the outer peripheral side, the left end of the second guide sleeve 7-3 is provided with a second annular eaves C extending towards the outer peripheral side, and the first annular eaves B abuts against the right end outer peripheral side surface of the second groove body 15-2, and the second annular eaves C abuts against the left end outer peripheral side surface of the first groove body 2-1.

[0043] Further preferably, a first limiting ring 5-4 is fixedly installed by embedding at the left end of the mounting hole on the impeller main body 5-1, and a second limiting ring 5-5 is fixedly installed by embedding at the right end. A limiting baffle 4-1 is provided at the left end of the pump shaft 4. The left end of the first bushing 6-1 abuts against the right end surface of the limiting baffle 4-1. The left end of the impeller main body 5-1 is tightly abutted against the right end of the first bushing 6-1 and the right end of the first sliding bearing 6-2 through the first limiting ring 5-4. The right end of the impeller main body 5-1 is tightly abutted against the left end of the second bushing 7-1 and the left end of the second sliding bearing 7-2 through the second limiting ring 5-5. The right end of the second bushing 7-1 penetrates through the central hole on the first pump cover 2 and abuts against the left end surface of the inner magnetic rotor 8. A locking nut 4-2 is screwed and installed at the right end of the pump shaft 4.

[0044] Further preferably, the material of the isolation sleeve 9 is one of PEEK, ceramic, silicon carbide, and polytetrafluoroethylene; the first limiting ring 5-4 and the second limiting ring 5-5 are both one of alloy tool steel, high-speed steel, and cemented carbide; the material of the inner magnetic rotor 8 is one of samarium and cobalt.

[0045] Further preferably, the outer magnetic rotor 10 is fixedly pressed on the left end of the outer magnetic shaft 11 through fastening screws and an outer magnetic gasket 11-1. The outer magnetic shaft 11 is installed on the suspension body 12 through a third bearing assembly. An outer bearing cover 17 is provided on the outer side of the right end of the suspension body 12. Specifically, the third bearing assembly includes a third bearing 13 and a fourth bearing 14. The right end of the suspension body 12 has a straight pipe 12-1 communicating with its internal cavity. The straight pipe 12-1 also has an oil filling port 12-2 communicating with its internal cavity. An oil filling nozzle is installed inside the oil filling port 12-2. The third bearing 13 is fixedly installed by embedding between the left end inner wall surface of the straight pipe 12-1 and the left end outer wall surface of the outer magnetic shaft 11. The fourth bearing 14 is fixedly installed by embedding between the right end inner wall surface of the straight pipe 12-1 and the right end outer wall surface of the outer magnetic shaft 11.

[0046] Further preferably, legs 16 are respectively provided at the bottom of the pump body 1 and the bottom of the suspension body 12.

[0047] For the magnetic pump with good heat dissipation performance of the bearing assembly on the pump shaft of the present utility model, by installing the bearing assembly 1 for supporting the left end of the pump shaft on the flow guiding assembly inside the liquid inlet, the slurry flowing through the inside of the liquid inlet can take away the heat on the bearing assembly 1 in time, avoiding damage due to excessive temperature of the bearing assembly 1. Compared with the installation method of the traditional magnetic pump that centrally installs the bearing assembly for supporting the pump shaft at the rear end of the pump shaft, the heat generated by the bearing assembly 2 can also be timely conducted out through the pump cover 1 and the pump shaft, thereby prolonging the maintenance cycle of the bearing assembly 1 and the bearing assembly 2; the overall structural design is simple, the preparation and implementation feasibility is high, and the practicability is strong.

[0048] The main blades on the material-facing side of the impeller body are designed as arc-shaped structures, so that vortex flow is more likely to be generated in the pump cavity, improving the working efficiency of the magnetic pump; at the same time, secondary blades are arranged on the material-backing side of the impeller body, which can play a role in pressure reduction and isolation, reduce the axial force on the impeller, prevent solid particles in the slurry from entering the inside of the isolation sleeve and causing blockage and wear, and play a role in dynamic sealing, so that the magnetic pump in Embodiment 1 can be used to transport alkali liquid or other alkaline slurries.

[0049] Embodiment 2

[0050] As Figures 5 to 6 shown, the present utility model is a magnetic pump with good heat dissipation performance of the bearing assembly on the pump shaft. The difference from the magnetic pump in Embodiment 1 is that the bearing assembly 1 includes a sleeve 1 6-1 and a sliding bearing 1 6-2. The sleeve 1 6-1 is sleeved and fixed on the left end of the pump shaft 4, and the sliding bearing 1 6-2 is sleeved and installed outside the sleeve 1 6-1, and the sliding bearing 1 6-2 is embedded and fixed inside the groove 2 15-2 on the flow guiding assembly 15;

[0051] The middle of the pump cover 1 has a groove 1 2-1 with an opening facing the left end. The bearing assembly 2 includes a sleeve 2 7-1 and a sliding bearing 2 7-2. The sleeve 2 7-1 is sleeved and fixed in the middle of the pump shaft 4, and the sliding bearing 2 7-2 is sleeved and installed outside the sleeve 2 7-1, and the sliding bearing 2 7-2 is embedded and fixed inside the groove 1 2-1 on the pump cover 1. Specifically, the right end of the sliding bearing 1 6-2 is provided with a ring-shaped eaves B extending towards the outer peripheral side, the left end of the sliding bearing 2 7-2 is provided with a ring-shaped eaves C extending towards the outer peripheral side, and the ring-shaped eaves B abuts against the right outer peripheral side of the groove 2 15-2, and the ring-shaped eaves C abuts against the left outer peripheral side of the groove 1 2-1.

[0052] Preferably, it includes a pump cover 2 3. The pump cover 2 3 is installed at the left end of the pump body 1, and the liquid inlet 1-1 is located on the pump cover 2 3.

[0053] Further preferably, wear-resistant layer A is die-cast on the inner side surface of the pump body 1, the left and right side surfaces of the first pump cover 2, the inner wall surface of the central hole, the side surface of the second pump cover 3 facing the pump chamber 1-3, the outer side surface of the impeller 5, the outer side surface of the inner magnetic rotor 8, the outer side surface of the flow guiding vane 15-3, and the outer side surface of the conical cap 15-1. Specifically, the conical cap 15-1 can also be die-cast on the inner end edge of the flow guiding vane 15-3.

[0054] Further preferably, the material of the wear-resistant layer A and the material of the conical cap 15-1 are both one of PEEK, ceramics, silicon carbide, and polytetrafluoroethylene.

[0055] Further preferably, the wear-resistant layer A on the right end surface of the inner magnetic rotor 8 has a mounting hole corresponding to the central hole of the inner magnetic rotor 8, and a sealing cover 4-3 is installed on the mounting hole.

[0056] The main blades on the material-receiving side surface of the impeller body are designed as arc-shaped structures, so that vortex flow is more easily generated in the pump chamber, improving the working efficiency of the magnetic pump; at the same time, secondary blades are arranged on the material-discharging side surface of the impeller body, which can play a role in decompression and isolation, reduce the axial force on the impeller, prevent solid particles in the slurry from entering the inside of the isolation sleeve to cause blockage and wear, and play a role in dynamic sealing, so that the magnetic pump in Embodiment 2 can be used to transport slurries with a high solid content such as mortar.

[0057] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the technical principle of the present invention, several improvements and refinements can still be made, and these improvements and refinements should also be regarded as the protection scope of the present invention.

Claims

1. A magnetic pump with good heat dissipation performance of the bearing assembly on the pump shaft, comprising a pump body (1), a pump shaft (4), an impeller (5), an inner magnetic rotor (8), a isolation sleeve (9), an outer magnetic rotor (10), an outer magnetic shaft (11) and a suspension body (12). The interior of the pump body (1) has a pump chamber (1-3). A first pump cover (2) and a suspension body (12) are successively installed at the right end of the pump body (1). The left end of the pump body (1) has a liquid inlet (1-1) that communicates with its internal pump chamber (1-3). A liquid outlet (1-2) that communicates with its internal pump chamber (1-3) is provided on the outer peripheral side of the pump body (1). The outer magnetic rotor (10) is rotatably installed inside the suspension body (12) through the outer magnetic shaft (11). An isolation sleeve (9) located inside the outer magnetic rotor (10) is also fixedly provided on the right side surface of the first pump cover (2). The right end of the pump shaft (4) is fixedly installed with an inner magnetic rotor (8) located inside the isolation sleeve (9), and the inner magnetic rotor (8) and the outer magnetic rotor (10) are coaxially arranged. The liquid inlet (1-1) has a flow guiding assembly (15) inside, and it is characterized in that, The described diversion component (15) has a second groove body (15-2) with an opening facing the right end. The left end of the pump shaft (4) is rotatably installed inside the second groove body (15-2) of the diversion component (15) through the first bearing assembly (6). The middle part of the pump shaft (4) passes through and is rotatably installed on the central hole of the first pump cover (2) through the second bearing assembly (7).

2. The magnetic pump with good heat dissipation performance of the bearing assembly on the pump shaft according to claim 1, characterized in that, The described impeller (5) includes an impeller main body (5-1), main blades (5-2), and auxiliary blades (5-3). The impeller main body (5-1) has a disc-shaped structure, and there is an installation hole in the center of the impeller main body (5-1). A number of the main blades (5-2) are circumferentially and evenly distributed on the material-facing side of the impeller main body (5-1), and the main blades (5-2) are arc-shaped structures bent in the same rotation direction. A number of the auxiliary blades (5-3) are circumferentially and evenly distributed on the material-backing side of the impeller main body (5-1).

3. The magnetic pump with good heat dissipation performance of the bearing assembly on the pump shaft according to claim 2, characterized in that, The described diversion component (15) includes a conical cap (15-1) with a tip facing the material-facing side. The second groove body (15-2) is located inside the conical cap (15-1). A number of diversion wing plates (15-3) are radially and spacedly distributed on the outer peripheral side of the conical cap (15-1). One end of the diversion wing plate (15-3) far from the conical cap (15-1) is fixedly arranged on the inner peripheral side wall surface of the liquid inlet (1-1).

4. The magnetic pump with good heat dissipation performance of the bearing assembly on the pump shaft according to claim 3, characterized in that, The described first bearing assembly (6) includes a first shaft sleeve (6-1), a first sliding bearing (6-2), and a first guide sleeve (6-3). The first guide sleeve (6-3) is fixedly installed by embedding inside the second groove body (15-2) of the diversion component (15). The first shaft sleeve (6-1) is sleeved and fixedly arranged on the left end of the pump shaft (4). The first sliding bearing (6-2) is sleeved and installed outside the first shaft sleeve (6-1), and the first sliding bearing (6-2) is embedded inside the first guide sleeve (6-3). The middle part of the described first pump cover (2) has a first groove body (2-1) with an opening facing the left end. The described second bearing assembly (7) includes a second shaft sleeve (7-1), a second sliding bearing (7-2), and a second guide sleeve (7-3). The second guide sleeve (7-3) is fixedly installed by embedding inside the first groove body (2-1) of the first pump cover (2). The second shaft sleeve (7-1) is sleeved and fixedly arranged on the middle part of the pump shaft (4). The second sliding bearing (7-2) is sleeved and installed outside the second shaft sleeve (7-1), and the second sliding bearing (7-2) is fixedly installed by embedding inside the second guide sleeve (7-3).

5. The magnetic pump with good heat dissipation performance of the bearing assembly on the pump shaft according to claim 3, characterized in that, The described first bearing assembly (6) includes a first shaft sleeve (6-1) and a first sliding bearing (6-2). The first shaft sleeve (6-1) is sleeved and fixedly arranged on the left end of the pump shaft (4). The first sliding bearing (6-2) is sleeved and installed outside the first shaft sleeve (6-1), and the first sliding bearing (6-2) is fixedly installed by embedding inside the second groove body (15-2) of the diversion component (15). The middle part of the first pump cover (2) has a first groove body (2-1) with an opening facing the left end. The second bearing assembly (7) includes a second sleeve (7-1) and a second sliding bearing (7-2). The second sleeve (7-1) is sleeved and fixed in the middle part of the pump shaft (4). The second sliding bearing (7-2) is sleeved and installed outside the second sleeve (7-1), and the second sliding bearing (7-2) is embedded and fixed inside the first groove body (2-1) on the first pump cover (2).

6. The magnetic pump with good heat dissipation performance of the bearing assembly on the pump shaft as claimed in claim 4 or 5, wherein It further includes a second pump cover (3). The second pump cover (3) is installed at the left end of the pump body (1). The liquid inlet (1-1) is located on the second pump cover (3).

7. The magnetic pump with good heat dissipation performance of the bearing assembly on the pump shaft according to claim 6, characterized in that, A wear-resistant layer (A) is die-cast on the inner side surface of the pump body (1), the left and right side surfaces of the first pump cover (2), the inner wall surface of the central hole, the side surface of the second pump cover (3) facing the pump chamber (1-3), the outer side surface of the impeller (5), the outer side surface of the inner magnetic rotor (8), the outer side surface of the guide vane (15-3), and the outer side surface of the conical cap (15-1).

8. The magnetic pump with good heat dissipation performance of the bearing assembly on the pump shaft according to claim 7, characterized in that, A first limit ring (5-4) is embedded and fixed at the left end of the mounting hole on the impeller main body (5-1), and a second limit ring (5-5) is embedded and fixed at the right end. A limit baffle (4-1) is provided at the left end of the pump shaft (4). The left end of the first sleeve (6-1) abuts against the right end surface of the limit baffle (4-1). The left end of the impeller main body (5-1) is tightly abutted against the right end of the first sleeve (6-1) and the right end of the first sliding bearing (6-2) through the first limit ring (5-4). The right end of the impeller main body (5-1) is tightly abutted against the left end of the second sleeve (7-1) and the left end of the second sliding bearing (7-2) through the second limit ring (5-5). The right end of the second sleeve (7-1) penetrates through the central hole on the first pump cover (2) and abuts against the left end surface of the inner magnetic rotor (8). A locking nut (4-2) is screwed and installed at the right end of the pump shaft (4).

9. The magnetic pump with good heat dissipation performance of the bearing assembly on the pump shaft according to claim 8, characterized in that, The material of the wear-resistant layer (A) and the material of the isolation sleeve (9) are both one of PEEK, ceramics, silicon carbide, and polytetrafluoroethylene. The first limit ring (5-4) and the second limit ring (5-5) are both one of alloy tool steel, high-speed steel, and cemented carbide. The material of the inner magnetic rotor (8) is one of samarium or cobalt.

10. The magnetic pump with good heat dissipation performance of the bearing assembly on the pump shaft according to claim 9, characterized in that, The outer magnetic rotor (10) is pressed and fixed at the left end of the outer magnetic shaft (11) through fastening screws and an outer magnetic gasket (11-1). The outer magnetic shaft (11) is installed on the suspension body (12) through a third bearing assembly. A bearing gland (17) is provided outside the right end of the suspension body (12).

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