Internal cooling device for a magnetic drive pump

Abstract

The utility model discloses an internal cooling device for magnetic force pump, including pump cover, coaxial seal setting in the isolating sleeve subassembly of pump cover, the pressure plate of detachable coaxial setting in one side of pump cover, the impeller of coaxial rotatable setting in one side of pump cover, pump cover side is opposite the impeller and is provided with a plurality of flow guide hole, the inner wall of flow guide hole is provided with flow guide slope, the import area of flow guide hole is greater than the export area of flow guide hole, flow guide hole with isolating sleeve subassembly inside intercommunication, the impeller is opposite one side of pump cover and is provided with a plurality of vice leaf, the utility model discloses an internal cooling device makes the high pass rate of medium in flow guide hole, has improved heat transfer efficiency, has reduced the frequency of occurrence of dry rotation greatly, has prolonged the service life of pump.

Description

Technical Field

[0001] This utility model relates to the field of magnetic pump technology, specifically to an internal cooling device for a magnetic pump. Background Technology

[0002] In existing magnetic pumps, the sliding bearings and wear rings rely on the medium for lubrication and cooling. The medium enters the isolation sleeve from the pump chamber through pre-drilled holes in the pump cover. Under high-flow conditions, this is prone to blockage or insufficient cooling efficiency when encountering high-density, high-viscosity, or easily crystallizing media. This can lead to dry running of the internal magnetic rotor, generating high temperatures and causing damage, thus affecting the normal operation of the pump and potentially resulting in significant economic losses. Therefore, a new technical solution is urgently needed to address at least one of these problems. Summary of the Invention

[0003] The purpose of this invention is to provide an internal cooling device for a magnetic pump, which increases the flow rate of the medium in the guide hole, improves the heat transfer efficiency, greatly reduces the frequency of dry running, and extends the service life of the magnetic pump.

[0004] To achieve the above technical objectives and meet the above technical requirements, the technical solution adopted by this utility model is: an internal cooling device for a magnetic pump, characterized in that: it includes a pump cover, an isolation sleeve assembly coaxially and sealed to the pump cover, a detachable pressure plate coaxially and disposed on one side of the pump cover, and an impeller coaxially and rotatably disposed on one side of the pump cover. The pump cover has multiple guide holes on the side facing the impeller, the inner wall of the guide holes has a guide slope, the inlet area of ​​the guide holes is larger than the outlet area of ​​the guide holes, the guide holes are internally connected to the isolation sleeve assembly, and the impeller has multiple auxiliary blades on the side facing the pump cover.

[0005] As a preferred technical solution, the number of the flow guide holes is four, namely the first flow guide hole, the second flow guide hole, the third flow guide hole and the fourth flow guide hole.

[0006] As a preferred technical solution, the outlets of the first guide hole to the fourth guide hole are arranged in a circular array with the central axis of the pump cover as the reference.

[0007] As a preferred technical solution, the inlet of the first guide hole extends vertically, the inlets of the second to fourth guide holes extend horizontally, the inlets of the second guide hole and the third guide hole are symmetrically arranged vertically, and the inlets of the third guide hole and the fourth guide hole are symmetrically arranged horizontally.

[0008] As a preferred technical solution, a positioning bushing is provided at the center of the pump cover, and multiple guide vanes are provided on the outer periphery of the positioning bushing.

[0009] As a preferred technical solution, the positioning bushing is embedded with a first sliding bearing and a second sliding bearing, and the two first sliding bearings and the second sliding bearing are symmetrically arranged.

[0010] As a preferred technical solution, the first sliding bearing is fitted with a first bushing, the second sliding bearing is fitted with a second bushing, the first bushing and the second bushing are coaxially and rotatably fitted with a pump shaft, one end of the pump shaft is fitted with an inner magnet, and the other end is sealed to the impeller.

[0011] As a preferred technical solution, a washer is provided between the first bushing and the second bushing, and the washer is sleeved on the pump shaft.

[0012] As a preferred technical solution, the isolation sleeve assembly includes an inner sleeve and an outer sleeve fitted onto the inner sleeve, with a cavity provided between the inner sleeve and the outer sleeve.

[0013] As a preferred technical solution, the gasket is a PTFE gasket.

[0014] The beneficial effects of this utility model are: 1) The impeller is equipped with auxiliary blades, which apply centrifugal force to the medium on the back of the impeller, causing the medium to rotate. While balancing the axial force, it applies pressure to the front end of the pump cover, forcing the medium into the isolation sleeve assembly through the guide hole. The inlet area of ​​the guide hole is larger than the outlet area of ​​the guide hole to prevent the medium from clogging at the inlet of the guide hole. The guide slope can guide the flow of the medium, improve the medium throughput, improve the heat transfer efficiency, greatly reduce the frequency of dry running, and extend the service life of the magnetic pump. 2) The first to fourth guide holes can further improve the circulation efficiency of the medium, thereby improving the heat transfer efficiency; 3) The guide vanes can guide the medium from the outlet of the guide hole into the interior of the isolation sleeve assembly, enhancing the internal circulation of the isolation sleeve assembly and making it more conducive to the lubrication and cooling of the sliding bearing; 4) The cavity between the inner and outer spacers serves as a heat insulation layer. Attached Figure Description

[0015] Figure 1 This is a structural diagram of an internal cooling device provided in one embodiment of the present invention; Figure 2 This is a structural diagram of a pump cover provided in one embodiment of the present invention; Figure 3 This is a structural diagram of an impeller provided in one embodiment of the present invention; Figure 4 This is a partial structural diagram of a magnetic pump provided in one embodiment of the present invention.

[0016] exist Figures 1-4In the middle, 1. Pump cover; 101. First guide hole; 102. Second guide hole; 103. Third guide hole; 104. Fourth guide hole; 105. Guide slope; 106. Positioning bushing; 2. Isolation sleeve assembly; 201. Inner partition sleeve; 202. Outer partition sleeve; 3. Pressure plate; 4. Impeller; 401. Secondary blade; 5. Guide vane; 6. First sliding bearing; 7. Second sliding bearing; 8. First bushing; 9. Second bushing; 10. Pump shaft; 11. Inner magnet; 12. Washer; 13. First sealing sleeve; 14. First O-ring; 15. Second sealing sleeve; 16. Second O-ring; 17. Third O-ring; 18. Pump casing. Detailed Implementation

[0017] The present invention will now be further described with reference to the accompanying drawings.

[0018] In the accompanying drawings of this utility model, the same or similar reference numerals correspond to the same or similar components. In the description of this utility model, it should be understood that if terms such as "head," "tail," "top," "bottom," "left," "right," "front," "rear," "inner," and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they are only for the convenience of describing this utility model, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting this patent. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0019] Please see Figures 1-4 This utility model provides an internal cooling device for a magnetic pump, including a pump cover 1, an isolation sleeve assembly 2 coaxially and sealed to the pump cover 1, a detachable pressure plate 3 coaxially and disposed on one side of the pump cover 1, and an impeller 4 coaxially and rotatably disposed on one side of the pump cover 1. The pump cover 1 has multiple guide holes on the side facing the impeller 4. The inner wall of each guide hole has a guide slope 105. The inlet area of ​​each guide hole is larger than its outlet area. The guide holes communicate internally with the isolation sleeve assembly 2. The impeller 4 faces the... Multiple auxiliary vanes 401 are provided on one side of the pump cover 1, and auxiliary vanes 401 are provided on the impeller 4. They apply centrifugal force, i.e., reverse hydraulic force, to the medium on the back of the impeller 4, causing the medium to rotate. While balancing the axial force, they apply pressure to the front end of the pump cover 1, forcing the medium into the isolation sleeve assembly 2 through the guide hole. The inlet area of ​​the guide hole is larger than the outlet area of ​​the guide hole to prevent the medium from clogging at the inlet of the guide hole. The guide slope 105 can guide the flow of the medium, improve the medium throughput, improve the heat transfer efficiency, greatly reduce the frequency of dry running, and extend the service life of the magnetic pump.

[0020] like Figures 1-4As shown, specifically, multiple auxiliary blades 401 form a vortex structure, causing the medium to form vortices, which plays a role in pressurization.

[0021] like Figures 1-4 As shown, there are four flow guide holes, namely the first flow guide hole 101, the second flow guide hole 102, the third flow guide hole 103 and the fourth flow guide hole 104. The first flow guide hole 101 to the fourth flow guide hole 104 can further improve the medium circulation efficiency, thereby improving the heat transfer efficiency.

[0022] like Figures 1-4 As shown, further, the outlets of the first guide hole 101 to the fourth guide hole 104 are arranged in a circumferential array with the central axis of the pump cover 1 as the reference, ensuring that the center points of the outlets of the first guide hole 101 to the fourth guide hole 104 are approximately in the same reference circle, which facilitates the subsequent guidance of the medium into the isolation sleeve assembly 2.

[0023] like Figures 1-4 As shown, the inlet of the first guide hole 101 extends vertically, and the inlets of the second guide hole 102 to the fourth guide hole 104 extend horizontally. The inlets of the second guide hole 102 and the third guide hole 103 are symmetrically arranged vertically, and the inlets of the third guide hole 103 and the fourth guide hole 104 are symmetrically arranged horizontally, which facilitates the entry of the medium into the guide hole. In this way, the inlets of the first guide hole 101 to the fourth guide hole 104 are waist-shaped groove structures, which facilitates the entry of the medium into the guide hole and is not easily blocked even when encountering high-density, high-viscosity or easily crystallizing media.

[0024] like Figures 1-4 As shown, a positioning bushing 106 is provided at the center of the pump cover 1, and multiple guide vanes 5 are provided on the outer periphery of the positioning bushing 106. When the medium comes out from the outlet of the guide hole, it is guided into the isolation sleeve assembly 2 through the guide vanes 5, which enhances the internal circulation of the isolation sleeve assembly 2 and is more conducive to the lubrication and cooling of the sliding bearing.

[0025] like Figures 1-4 As shown, the positioning bushing 106 is embedded with a first sliding bearing 6 and a second sliding bearing 7. The two first sliding bearings 6 and the second sliding bearing 7 are symmetrically arranged. The first sliding bearing 6 is embedded with a first bushing 8, and the second sliding bearing 7 is embedded with a second bushing 9. The first bushing 8 and the second bushing 9 are coaxially and rotatably inserted with a pump shaft 10. One end of the pump shaft 10 is fitted with an inner magnet 11, and the other end is sealed to the impeller 4. The sliding bearing and the bushing cooperate to achieve good rotational stability.

[0026] like Figures 1-4As shown, a washer 12 is provided between the first bushing 8 and the second bushing 9. The washer 12 is sleeved on the pump shaft 10 and serves to separate the first bushing 8 and the second bushing 9. Furthermore, the washer 12 is a PTFE washer, which is not easy to wear on the first bushing 8 and the second bushing 9.

[0027] like Figures 1-4 As shown, the isolation sleeve assembly 2 includes an inner sleeve 201 and an outer sleeve 202 sleeved on the inner sleeve 201. A cavity is provided between the inner sleeve 201 and the outer sleeve 202 to achieve the effect of heat insulation.

[0028] like Figures 1-4 As shown, the impeller 4 is fitted with a first sealing sleeve 13, and the inner wall of the first sealing sleeve 13 is fitted with a first O-ring 14. The first O-ring 14 is fitted onto the pump shaft 10. The inner magnet 11 is fitted with a second sealing sleeve 15, and the inner wall of the second sealing sleeve 15 is fitted with a second O-ring 16. The second O-ring 16 is fitted onto the pump shaft 10. Both ends of the pump shaft 10 pass through the first sealing sleeve 13 and the second sealing sleeve 15 respectively. A third O-ring 17 is provided between the inner isolation sleeve and the pump cover 1. The sealing performance is good, preventing the medium from entering the impeller 4 and the inner magnet 11 and causing damage.

[0029] like Figures 1-4 As shown, the pump cover 1 has a flange edge, which can be installed on the pump casing 18, and will not be described in detail again.

[0030] The above embodiments are merely descriptions for clearly illustrating the present utility model, and are not intended to limit the implementation. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all implementations here, and the obvious variations or modifications derived therefrom are still within the protection scope of the present utility model.

Claims

1. An internal cooling device for a magnetic pump, characterized in that: The pump includes a pump cover, an isolation sleeve assembly coaxially sealed to the pump cover, a detachable pressure plate coaxially disposed on one side of the pump cover, and an impeller coaxially rotatably disposed on one side of the pump cover. The pump cover has multiple guide holes on the side facing the impeller, and the inner wall of the guide holes has a guide slope. The inlet area of ​​the guide holes is larger than the outlet area of ​​the guide holes. The guide holes are internally connected to the isolation sleeve assembly. The impeller has multiple secondary blades on the side facing the pump cover.

2. The internal cooling device for a magnetic pump according to claim 1, characterized in that, The number of guide holes is four, namely a first guide hole, a second guide hole, a third guide hole, and a fourth guide hole. The inlets of the first guide hole, the second guide hole, the third guide hole, and the fourth guide hole are waist-shaped groove structures.

3. The internal cooling device for a magnetic pump according to claim 2, characterized in that, The outlets of the first to the fourth guide holes are arranged in a circular array with the central axis of the pump cover as the reference line.

4. The internal cooling device for a magnetic pump according to claim 2, characterized in that, The inlet of the first guide hole extends vertically, and the inlets of the second to fourth guide holes extend horizontally. The inlets of the second and third guide holes are symmetrically arranged vertically and horizontally.

5. The internal cooling device for a magnetic pump according to claim 1, characterized in that, A positioning bushing is provided at the center of the pump cover, and multiple guide vanes are provided on the outer periphery of the positioning bushing.

6. The internal cooling device for a magnetic pump according to claim 5, characterized in that, The positioning bushing is embedded with a first sliding bearing and a second sliding bearing, and the two first sliding bearings and the second sliding bearing are symmetrically arranged.

7. The internal cooling device for a magnetic pump according to claim 6, characterized in that, The first sliding bearing is fitted with a first bushing, and the second sliding bearing is fitted with a second bushing. The first bushing and the second bushing are coaxially rotatably fitted with a pump shaft. One end of the pump shaft is fitted with an inner magnet, and the other end is sealed to the impeller.

8. The internal cooling device for a magnetic pump according to claim 7, characterized in that, A washer is provided between the first bushing and the second bushing, and the washer is fitted onto the pump shaft.

9. The internal cooling device for a magnetic pump according to claim 1, characterized in that, The isolation sleeve assembly includes an inner sleeve and an outer sleeve fitted onto the inner sleeve, with a cavity provided between the inner sleeve and the outer sleeve.

10. The internal cooling device for a magnetic pump according to claim 8, characterized in that, The gasket is a PTFE gasket.

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