Shield pump with self-cleaning filtering structure

Abstract

The utility model relates to the technical field of shield pumps, in particular to a shield pump with a self-cleaning filtering structure, which comprises a shield pump which comprises a shield pump water inlet, a shield pump water outlet, an outer circulating pipeline, a rear bearing, a rotor, a front bearing and an impeller. A shield pump water inlet is formed in one side of the shield pump, a shield pump water outlet is formed in the upper end of the shield pump, a stator is sleeved with the shield pump, a rotor penetrates through the stator, one end of the rotor is sleeved with a rear bearing, the other end of the rotor penetrates through a front bearing to be connected with an impeller, an impeller overflowing hole is formed in the impeller, and a water outlet through hole is formed in one side of the shield pump water outlet. Compared with the prior art, the hydraulic power of the water inlet of the shield pump is not affected, self-cleaning is achieved, the filter does not need to be maintained, the risk that the shield pump breaks down due to the fact that maintenance is not timely does not exist, and the shield pump is simple, convenient, low in cost and exquisite and novel in structure.

Description

Technical Field

[0001] The utility model relates to the technical field of canned pumps, and specifically relates to a canned pump with a self-cleaning filtering structure. Background Art

[0002] A canned pump is a pump with an integrated design of a pump and a motor, and the rotor and stator of the motor need to be cooled by its own fluid medium. A very thin shielding sleeve is arranged between the rotor and the stator. The gap between the two shielding sleeves is very small, reaching 0.5 mm, and the clearance of the sliding bearing is also only 0.5 mm. Once there are impurities, there is a risk of blockage, and it will also cause the shielding sleeve and the sliding shaft to be worn by solid particles. Therefore, it is necessary to ensure the cleanliness of the medium and no solid particles can enter the inside of the canned pump. However, in the prior art, setting a filter in the inlet pipeline of the canned pump will affect the hydraulic performance of the canned pump inlet and greatly increase the cost. While setting a filter in the external circulation pipeline requires frequent maintenance, and at the same time, there is a risk of blockage, resulting in motor burnout. Summary of the Invention

[0003] In order to overcome the deficiencies of the prior art, the utility model provides a canned pump with a self-cleaning filtering structure. Through the filtering of the filter structure, by setting the water outlet above the filter, the fluid medium will pass through the filter structure for the second time, washing away the solid particles and realizing the self-cleaning function.

[0004] To achieve the above object, a canned pump with a self-cleaning filtering structure is designed, including a canned pump. The canned pump includes a canned pump water inlet, a canned pump water outlet, an external circulation pipeline, a rear bearing, a rotor, a front bearing, and an impeller. The canned pump is provided with a canned pump water inlet on one side, a canned pump water outlet at the upper end of the canned pump. A stator is sleeved inside the canned pump, the rotor passes through the stator, a rear bearing is sleeved at one end of the rotor, the other end of the rotor passes through the front bearing and is connected to the impeller, and the impeller is provided with an impeller flow hole. One side of the canned pump water outlet is provided with a water outlet through hole, one end of the water outlet through hole is threadedly connected to a filtering device, the other end of the water outlet through hole is connected to one end of the external circulation pipeline, the other end of the external circulation pipeline is connected to one end of the internal circulation pipeline, and the other end of the internal circulation pipeline passes through the impeller flow hole and leads into the canned pump water outlet and is connected to a water spraying port.

[0005] The water spraying port is located below the filtering device.

[0006] A rotor shielding sleeve is sleeved outside the rotor.

[0007] A stator shielding sleeve is sleeved inside the stator.

[0008] Tiny flow channels for the internal circulation pipeline to pass through are respectively arranged between the rear bearing and the rotor, between the rotor shielding sleeve and the stator shielding sleeve, and between the front bearing and the rotor.

[0009] Compared with the prior art, the utility model has no influence on the hydraulics of the inlet of the canned motor pump, realizes self-cleaning, does not require filter maintenance, and there is no risk of canned motor pump failure caused by untimely maintenance. It is simple and convenient, with low cost, and has a delicate and novel structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a sectional view of the utility model.

[0011] Figure 2 It is a partially enlarged view of the water outlet.

[0012] Figure 3 It is a partially enlarged view of the impeller.

[0013] See Figures 1 to 3 , 1 is a canned motor pump, 2 is the inlet of the canned motor pump, 3 is the outlet of the canned motor pump, 3.1 is the through hole of the outlet, 4 is a filtering device, 5 is an external circulation pipeline, 6 is a rear bearing, 7 is a rotor, 8 is a rotor shielding sleeve, 9 is a stator, 10 is a stator shielding sleeve, 11 is a front bearing, 12 is an impeller, 13 is an impeller flow-through hole, 14 is an internal circulation pipeline, and 14.1 is a water spraying port. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0014] The following further describes the utility model with reference to the drawings.

[0015] As Figure 1 shown, the canned motor pump 1 includes an inlet 2 of the canned motor pump, an outlet 3 of the canned motor pump, an external circulation pipeline 5, a rear bearing 6, a rotor 7, a front bearing 11, and an impeller 12. The inlet 2 of the canned motor pump is provided on one side of the canned motor pump 1, the outlet 3 of the canned motor pump is provided at the upper end of the canned motor pump 1, a stator 9 is sleeved inside the canned motor pump 1, the rotor 7 passes through the stator 9, a rear bearing 6 is sleeved at one end of the rotor 7. As Figure 3 shown, the other end of the rotor 7 passes through the front bearing 11 and is connected to the impeller 12. The impeller 12 rotates at a high speed, converting the medium flowing in from the inlet 2 into a high-pressure fluid medium and entering the outlet 3. The impeller 12 is provided with an impeller flow-through hole 13. As Figure 2 shown, a through hole 3.1 of the outlet is provided on one side of the outlet 3 of the canned motor pump. One end of the through hole 3.1 of the outlet is threadedly connected to a filtering device 4. The filtering device 4 is used to filter solid particles in the fluid medium, and can effectively prevent solid particles from entering the external circulation pipeline 5, thereby playing a role in protecting the canned motor pump 1. The filtering device 4 can select different types of filtering devices 4 according to actual needs. The other end of the through hole 3.1 of the outlet is connected to one end of the external circulation pipeline 5. The other end of the external circulation pipeline 5 is connected to one end of the internal circulation pipeline 14. The other end of the internal circulation pipeline 14 passes through the impeller flow-through hole 13 and leads into the outlet 3 of the canned motor pump and is connected to the water spraying port 14.1.

[0016] The water spray nozzle 14.1 is located below the filtering device 4. The water spray nozzle 14.1 needs to be aligned with the filtering device 4. When solid particles block the outside of the filtering device 4, water flows out from the water spray nozzle 14.1 to wash away the solid particles, realizing the self-cleaning function.

[0017] A rotor shield 8 is sleeved outside the rotor 7. The rotor shield 8 and the rotor 7 form a sealed space, and the rotor shield 8 plays a role in protecting the rotor 7.

[0018] A stator shield 10 is sleeved inside the stator 9. The stator shield 10 and the stator 9 form a sealed space, and the stator shield 10 plays a role in protecting the stator 9.

[0019] Tiny flow channels through which the internal circulation pipeline 14 passes are respectively provided between the rear bearing 6 and the rotor 7, between the rotor shield 8 and the stator shield 10, and between the front bearing 11 and the rotor 7.

[0020] The specific implementation process of the present utility model is as Figure 1 shown by the arrow of the medium flow direction. The low-pressure fluid medium flows into the inlet 2 of the canned motor pump, passes through the impeller 12. The impeller 12 rotates at a high speed to convert the low-pressure fluid medium into a high-pressure fluid medium. The high-pressure fluid medium flows to the outlet 3 of the canned motor pump. Most of the high-pressure medium is directly discharged through the outlet 3 of the canned motor pump. A small amount of high-pressure medium enters the filtering device 4 and flows along the outer circulation pipeline 5 into the internal circulation pipeline 14 inside the canned motor pump 1. The internal circulation pipeline 14 passes through the internal flow channel of the canned motor pump 1 and passes through the impeller flow hole 13. Finally, the medium is re-introduced into the outlet 3 of the canned motor pump and sprayed out from the water spray nozzle 14.1 at the end of the internal circulation pipeline 14. Since the water spray nozzle 14.1 is set to be aligned with the filtering device 4, the medium will wash away the solid particles attached to the filtering device 4, realizing the self-cleaning function. The filtering device 4 therein can be replaced with different forms of filtering devices 4 according to specific needs. The filter of the present utility model does not need to be frequently maintained, and efficiently prevents the possible damage to the canned motor pump 1 caused by impurities.

Claims

1. A canned motor pump with a self-cleaning filtration structure, comprising a canned motor pump, characterized in that: The described canned motor pump (1) includes a canned motor pump water inlet (2), a canned motor pump water outlet (3), an external circulation pipeline (5), a rear bearing (6), a rotor (7), a front bearing (11), and an impeller (12). The canned motor pump (1) is provided with a canned motor pump water inlet (2) on one side, a canned motor pump water outlet (3) at the upper end. A stator (9) is sleeved inside the canned motor pump (1), and the rotor (7) passes through the inside of the stator (9). A rear bearing (6) is sleeved at one end of the rotor (7), and the other end of the rotor (7) passes through the front bearing (11) to connect to the impeller (12). The impeller (12) is provided with an impeller flow-through hole (13). One side of the canned motor pump water outlet (3) is provided with a water outlet through hole (3.1). One end of the water outlet through hole (3.1) is threadedly connected to a filtering device (4), and the other end of the water outlet through hole (3.1) is connected to one end of the external circulation pipeline (5). The other end of the external circulation pipeline (5) is connected to one end of an internal circulation pipeline (14). The other end of the internal circulation pipeline (14) passes through the impeller flow-through hole (13) and leads into the canned motor pump water outlet (3) to be connected to a water spraying port (14.1).

2. The canned motor pump with a self-cleaning filter structure according to claim 1, wherein: The described water spraying port (14.1) is located below the filtering device (4).

3. A canned motor pump with a self-cleaning filter structure according to claim 1, characterized in that: A rotor shielding sleeve (8) is sleeved outside the rotor (7).

4. A canned motor pump with a self-cleaning filter structure according to claim 1, characterized in that: A stator shielding sleeve (10) is sleeved inside the stator (9).

5. A canned motor pump with a self-cleaning filter structure according to claim 1 or 4, characterized in that: Tiny flow channels for the internal circulation pipeline (14) to pass through are respectively provided between the rear bearing (6) and the rotor (7), between the rotor shielding sleeve (8) and the stator shielding sleeve (10), and between the front bearing (11) and the rotor (7).

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