Magnetic peripheral pump with long service life

Abstract

The utility model relates to a long-service-life magnetic peripheral pump which comprises a pump cover and a pump body, and a pump cavity is defined by the pump cover and the pump body. An isolation cavity is defined by the isolation sleeve and the side, away from the pump cover, of the pump body; the pump shaft penetrates through the pump cavity and the isolation cavity; the impeller is located in the pump cavity and arranged at one end of the pump shaft, the impeller is of a symmetrical structure, and a balance hole and a water ring groove are formed in the impeller; the inner rotor assembly is located in the isolation cavity and arranged on the pump shaft in a sleeving mode; and the outer rotor assembly is positioned outside the isolation cavity and is opposite to the inner rotor assembly. The axial force balance effect of the magnetic peripheral pump is good, the impeller is symmetrically designed and is provided with the balance hole and the water ring groove, the impeller is positioned on the pump shaft through the jackscrew, the impeller can freely float and balance in the pump cavity, friction does not exist between the impeller and the pump body and between the impeller and the pump cover, meanwhile, axial friction between the sliding bearing and the thrust ring is reduced, and the service life of the pump is prolonged. Operation is more stable, and the service life is longer.

Description

Technical Field

[0001] This utility model relates to the field of magnetic vortex pump technology, specifically to a long-life magnetic vortex pump. Background Technology

[0002] Vortex pumps, as a type of small-flow, high-lift pump, are widely used in industries such as petroleum, chemical, pharmaceutical, electronic aluminum foil, and new energy. Currently, most vortex pump heads consist of four parts: the pump body, impeller, mechanical seal, and pump cover. The pump shaft and motor shaft are shared. The mechanical seal of this type of vortex pump uses a compression-type ordinary mechanical seal. The impeller is fixed by the preload of the impeller nut while simultaneously compressing the mechanical seal. The compression of the mechanical seal is often difficult to control effectively, resulting in shorter pump maintenance cycles and frequent replacement of the mechanical seal. Furthermore, vortex pumps have extremely high precision requirements. In actual machining and assembly, it is always difficult to control and adjust the axial position of the impeller, often requiring frequent adjustments. Moreover, the locking nut at the pump shaft end restricts the precision required to control the minute gaps on both sides of the impeller.

[0003] Most existing vortex pumps have wear-resistant rings on both sides of the impeller to prevent damage to the pump body and pump cover surface when the axial force of the rotor assembly is unbalanced. However, the above structure does not fully consider the impact of axial force on the pump during operation, relying entirely on the motor bearings to balance the axial force generated during pump operation. Especially for some high-lift vortex pumps, long-term operation can easily lead to wear and jamming of the impeller, pump body, and pump cover, resulting in motor stall, overcurrent, and motor burnout. As a fully sealed and leak-free pump, magnetic vortex pumps are susceptible to axial movement. Axial movement can cause the impeller to be unable to properly balance the axial force during operation, resulting in impeller friction, which poses a safety hazard during operation and makes the pump's performance unstable. Utility Model Content

[0004] The purpose of this invention is to overcome at least one of the defects of the prior art and provide a long-life magnetic vortex pump.

[0005] The objective of this utility model can be achieved through the following technical solutions:

[0006] A long-life magnetic vortex pump, comprising:

[0007] The pump cover and pump body together form the pump cavity;

[0008] An isolation sleeve that surrounds the side of the pump body opposite to the pump cover to form an isolation cavity;

[0009] A pump shaft passing through the pump chamber and the isolation chamber;

[0010] An impeller located inside the pump chamber and disposed at one end of the pump shaft, the impeller having a symmetrical structure and being provided with a balance hole and a water ring groove;

[0011] an inner rotor assembly located in the isolation cavity and sleeved on the pump shaft;

[0012] an outer rotor assembly located outside the isolation cavity and opposite to the inner rotor assembly.

[0013] Further, the pump shaft is provided with a bearing assembly, the bearing assembly comprising a shaft sleeve, a pair of sliding bearings and a bearing seat which are sleeved on the pump shaft in sequence from inside to outside, and the pair of sliding bearings are respectively sleeved on both sides of the shaft sleeve.

[0014] Further, a plurality of lubricating grooves are arranged on the axial friction end face and the inner hole of the sliding bearing to ensure sufficient lubrication.

[0015] Further, a pair of thrust bearings are sleeved on the pump shaft, and the pair of thrust bearings are respectively arranged on both sides of the shaft sleeve.

[0016] Further, the gap between the thrust bearing and the sliding bearing is 0.04-0.06mm.

[0017] Further, a first sealing gasket is arranged between the pump cover and the pump body.

[0018] Further, a second sealing gasket is arranged between the pump body and the isolation sleeve.

[0019] Further, the gap between the impeller and the pump body is 0.1-0.12mm.

[0020] Further, the axial gap between the pump cover and the impeller is 0.1-0.12mm.

[0021] Further, the magnetic vortex pump is also provided with a driving motor connected with the outer rotor assembly.

[0022] Compared with the prior art, the magnetic vortex pump has the following advantages:

[0023] (1) The long-life magnetic vortex pump has good axial force balance effect: the impeller is designed symmetrically and is provided with balance holes and water ring grooves, the impeller is positioned on the pump shaft through a top screw, the impeller can freely float and balance in the pump cavity, there is no friction between the impeller and the pump body and the pump cover, the axial friction between the sliding bearing and the thrust ring is reduced, the operation is more stable, and the service life is longer.

[0024] (2) The utility model provides a long -life magnetic vortex pump, the machining precision of this magnetic vortex pump is easy to control: adopt single shaft sleeve structure, the axial gap between sliding bearing and thrust bearing is easy to control, the impeller controls the gap between impeller and pump body through adjusting the top silk, then installs positioning pump shaft through the wheel hub top silk, and the installation precision is high. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 It is the schematic diagram of long -life magnetic vortex pump in the embodiment;

[0026] Figure 2 It is the partial schematic view of impeller and pump cover gap and impeller and pump body gap in the embodiment;

[0027] Figure 3 It is the partial schematic view of sliding bearing and thrust bearing axial gap in the embodiment;

[0028] Figure 4 It is the front view of impeller in the embodiment;

[0029] Figure 5 It is the side view of impeller in the embodiment;

[0030] The figure mark shows: 1-pump cover;2-first sealing pad;3-pump body;4-impeller;5-second sealing pad;6-retainer;7-pump shaft;8-shaft sleeve;9-sliding bearing;10-bearing seat;11-thrust bearing;12-inner rotor assembly;13-isolation sleeve;14-outer rotor assembly;15-connection frame;16-motor;17-bottom disc;a1-impeller 4 and pump cover 1 gap, a2-impeller 4 and pump body 3 gap;B-sliding bearing 9 and thrust bearing 11 axial gap. DETAILED DESCRIPTION

[0031] The utility model will be explained in detail below in combination with the drawings and specific embodiment. This embodiment is implemented under the premise of the technical scheme of the utility model, and detailed implementation mode and specific operation process are given, but the protection scope of the utility model is not limited to the following examples.

[0032] EMBODIMENT

[0033] This embodiment provides a long -life magnetic vortex pump, and the specific structure is seen Figures 1-5 , comprising:

[0034] Pump cover 1, pump body 3, the two form pump cavity;

[0035] Isolation sleeve 13 that the isolation cavity is formed to the side of the pump body 3 away from the pump cover 1;

[0036] Pump shaft 7 that the pump cavity and the isolation cavity are penetrated;

[0037] An impeller 4 is located in the pump cavity and arranged at one end of the pump shaft 7, the impeller 4 is symmetrical structure and provided with a balance hole 41 and a water ring groove 42, which can balance the force of the impeller 4 at different pressure sections of the vortex chamber, and ensure the stable operation of the vortex pump.

[0038] An inner rotor assembly 12 is located in the isolation cavity and sleeved on the pump shaft 7.

[0039] An outer rotor assembly 14 is located outside the isolation cavity and arranged opposite to the inner rotor assembly 12.

[0040] The balance hole 41 is a threaded hole, and a corresponding threaded hole is radially arranged on the hub, and the gap between the impeller 4 and the pump body 3 is adjusted by adjusting the screw of the balance hole.

[0041] In this embodiment, the pump shaft 7 is provided with a bearing assembly, which includes a sleeve 8, a pair of sliding bearings 9 and a bearing seat 10 which are sequentially sleeved on the pump shaft 7 from inside to outside, and the pair of sliding bearings 9 are respectively sleeved on both sides of the sleeve 8. Specifically, the sliding bearing 9 is made of pressureless sintered silicon carbide, and adopts a double sliding bearing structure, and the sleeve 8 matched therewith is made of tungsten carbide without hard alloy, and is a single sleeve structure.

[0042] In this embodiment, a plurality of lubricating grooves are arranged on the axial friction end face and the inner hole of the sliding bearing 9 to ensure sufficient lubrication.

[0043] In this embodiment, a pair of thrust bearings 11 are also sleeved on the pump shaft 7, and the pair of thrust bearings 11 are respectively arranged on both sides of the sleeve 8; wherein a retaining ring 6 is also sleeved on the pump shaft 7, and the retaining ring 6 abuts against the thrust bearing 11 near the impeller 4 among the pair of thrust bearings 11.

[0044] In this embodiment, the gap between the thrust bearing 11 and the sliding bearing is 0.04-0.06mm.

[0045] In this embodiment, a first sealing gasket 2 is arranged between the pump cover 1 and the pump body 3.

[0046] In this embodiment, a second sealing gasket 5 is arranged between the pump body 3 and the isolation sleeve 13.

[0047] In this embodiment, the gap between the impeller 4 and the pump body 5 is 0.1-0.12mm.

[0048] In this embodiment, the axial gap between the pump cover 1 and the impeller 4 is 0.1-0.12mm.

[0049] In the embodiment, the magnetic vortex pump further comprises a connecting frame 15 arranged outside the isolation sleeve 13, one end of the connecting frame 15 is connected with the pump body 3, and the other end is provided with a driving motor 16 connected with the outer rotor assembly 14, and the bottom of the driving motor 16 is provided with a bottom plate 17.

[0050] Working principle:

[0051] The magnetic vortex pump in the embodiment drives the outer rotor assembly 14 to rotate through the motor 16, and the inner rotor assembly 12 rotates synchronously, and the impeller 4 coaxial with the inner rotor assembly 12 rotates at high speed, so as to generate a pressure head. The medium to be transported is sealed in the pump body cavity and the isolation sleeve cavity, and a static sealing gasket is used instead of a dynamic shaft sealing structure, so that the magnetic vortex pump is fully sealed, has no leakage, and is safe and reliable.

[0052] The sliding bearing 9 in the embodiment is a double-bearing structure, uses pressureless sintered silicon carbide material, has high hardness, good self-lubricating performance, good wear resistance and corrosion resistance. The shaft sleeve 8 matched with the sliding bearing 9 in the radial direction is a single shaft sleeve structure made of hard alloy, and the thrust bearing 11 matched with the sliding bearing 9 in the axial direction is also made of hard alloy material. The axial gap b between the sliding bearing 9 and the thrust bearing 11 is 0.04mm-0.06mm, and the sliding bearing 9 is provided with a plurality of lubricating grooves on the axial friction end face and the inner hole, so as to ensure complete lubrication. The single shaft sleeve structure can well control the axial gap between the sliding bearing 9 and the thrust bearing 11, and reduce the influence of machining errors between mechanical parts.

[0053] In addition, the impeller 4 adopts a unique symmetrical structure design, and is provided with a balance hole 41 and a water ring groove 42, which can fully balance the axial force of the magnetic vortex pump, so as to reduce the axial force borne by the thrust bearing 11 and prolong the service life of the pump. During installation, the gap a2 between the impeller 4 and the pump body 3 is adjusted by rotating the adjusting screw in the balance hole 41, the gap a2 is 0.1-0.12mm, and then the impeller 4 is installed and positioned on the pump shaft 7 by using a jacking screw. The axial gap a2 between the pump cover 1 and the impeller 4 is also 0.1-0.12mm, which is slightly larger than the gap between the sliding bearing 8 and the thrust bearing 11, and when the pump runs axially, the impeller 4 will not rub against the pump body 3 and the pump cover 1, so that the service life of the magnetic vortex pump can be greatly improved, and the number of vulnerable parts is reduced.

[0054] The above is only a preferred embodiment of the utility model, and is not intended to limit the utility model in other forms. Any skilled person in the art can modify or change the above disclosed technical content to obtain equivalent embodiments. However, any simple modification, equivalent change and modification made on the basis of the technical essence of the utility model to the above embodiments still falls within the protection scope of the utility model technical scheme.

Claims

1. A long-life magnetic vortex pump, characterized by, The utility model relates to a magnetic force vortex pump, including: Pump cover (1), pump body (3), two enclose and form pump cavity; With the pump body (3) the side of the pump cover (1) is enclosed and forms the isolation cavity's isolation cover (13); Through the pump cavity with the pump shaft (7) of isolation cavity; Located in the pump cavity and set up in the pump shaft (7) one end's impeller (4), the impeller (4) is symmetric structure and is provided with balance hole (41) and water ring groove (42) in the impeller (4); Located in the isolation cavity and set up on the pump shaft (7) on the inner rotor assembly (12); Located outside the isolation cavity and with the inner rotor assembly (12) opposite setting's outer rotor assembly (14).

2. A long-life magnetic vortex pump according to claim 1, characterized in that The pump shaft (7) is provided with bearing assembly, the bearing assembly includes the sleeve (8) of the pump shaft (7) by inside to outside is set up in sequence, a pair of sliding bearings (9) and bearing seat (10), a pair of sliding bearings (9) are set up in the sleeve (8) both sides respectively.

3. A long-life magnetic vortex pump according to claim 2, characterized in that The axial friction end face of sliding bearing (9) and the inner hole all are provided with a plurality of lubrication grooves, to ensure sufficient lubrication.

4. A long-life magnetic vortex pump according to claim 2, characterized in that The pump shaft (7) is also set up with a pair of thrust bearing (11), a pair of thrust bearing (11) are arranged in the both sides of sleeve (8) respectively.

5. A long-life magnetic vortex pump according to claim 4, characterized in that The clearance between the thrust bearing (11) and the sliding bearing is 0.04~0.06mm.

6. A long-life magnetic vortex pump according to claim 1, characterized in that The first sealing pad (2) is arranged between the pump cover (1) and the pump body (3).

7. A long-life magnetic vortex pump according to claim 1, characterized in that The second sealing pad (5) is arranged between the pump body (3) and the isolation cover (13).

8. A long-life magnetic vortex pump according to claim 1, characterized in that The clearance between the impeller (4) and the pump body (3) is 0.1-0.12mm.

9. A long-life magnetic vortex pump according to claim 1, characterized in that The axial clearance between the pump cover (1) and the impeller (4) is 0.1-0.12mm.

10. A long-life magnetic vortex pump according to claim 1, characterized in that The magnetic force vortex pump is further provided with the drive motor (16) connected with the outer rotor assembly (14).

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