A bottom suction water pump

Abstract

The utility model discloses a bottom suction water pump, including motor, it includes the casing, the protection cover of being located in the casing and with the casing and the protection cover sealed joint lower cover, the casing with the protection cover between formation first filling cavity, the protection cover in formation second filling cavity, be equipped with stator in the first filling cavity, be equipped with rotor in the second filling cavity, be equipped with the shaft on the rotor, be equipped with the vane on the shaft end, the pump body is connected with the motor, be equipped with pumping chamber on the pump body and with the water outlet and the water inlet of the communication pumping chamber, the vane is located in the pumping chamber. The utility model provides a bottom suction water pump, and the stator is placed in the first filling cavity filled with resin oil, realizes insulation and moistureproof. The rotor is placed in the second filling cavity filled with cooling lubricating oil, and focuses on lubrication and heat dissipation, can also effectively prevent the invasion of pollutants, improves the service life.

Description

Technical Field

[0001] This application relates to the field of water pump technology, and in particular to a bottom suction water pump. Background Technology

[0002] Conventional submersible pump motors rely on a single sealed cavity, with both the stator and rotor exposed to the same environment. During long-term underwater operation, the risk of seal failure is high, which can easily lead to moisture or water leakage short circuits in the stator windings, and wear of the rotor bearings due to insufficient lubrication or contaminant intrusion. Utility Model Content

[0003] To solve the above problems, this technical solution provides a bottom suction pump.

[0004] To achieve the above objectives, the technical solution is as follows:

[0005] A bottom suction water pump, including

[0006] An electric motor includes a housing, a protective cover disposed within the housing, and a lower cover that is sealed to the housing and the protective cover. A first filling cavity is formed between the housing and the protective cover, and a second filling cavity is formed within the protective cover. A stator is disposed within the first filling cavity, and a rotor is disposed within the second filling cavity. A rotating shaft is disposed on the rotor, and blades are disposed at the end of the rotating shaft.

[0007] A pump body is connected to the motor; the pump body is provided with a pumping chamber, and an outlet and an inlet communicating with the pumping chamber, and the blades are located in the pumping chamber.

[0008] As described above, a bottom suction water pump has a port on the lower cover for fitting outside the opening of the protective cover, and an end cap covering the port. The end cap has an oil drain port that connects the second filling cavity to the outside, and a sealing screw for sealing the oil drain port.

[0009] As described above, in a bottom-suction water pump, the protective cover opening has an edge extending outward in the circumferential direction, the end cover has a first groove, and a first sealing ring is provided between the edge and the first groove. When the end cover is connected to the lower cover, the edge is pressed against it.

[0010] In the bottom suction pump described above, a sealing gasket is provided between the end cover and the lower cover.

[0011] As described above, in a bottom-suction water pump, the bottom of the protective cover is provided with a first bearing between it and the rotating shaft, and the end cover is provided with a second bearing between it and the rotating shaft.

[0012] As described above, a bottom suction pump has an end cover with a through hole for the rotating shaft to pass through, an upper mechanical seal for sealing the through hole, a lower mechanical seal that cooperates with the upper mechanical seal, and a spring for pressing the lower mechanical seal. A mechanical seal sealing ring is provided between the end cover and the upper mechanical seal.

[0013] As described above, in a bottom-suction pump, the bottom of the protective cover narrows to form a mounting cavity for the first bearing to be embedded.

[0014] As described above, the bottom suction pump also includes an upper housing, on which a fixed bracket is provided, and the fixed bracket is provided with a slot for the bottom of the protective cover to be inserted.

[0015] As described above, in a bottom-suction water pump, the first filling chamber is used to fill a solid filler, and the second filling chamber is used to fill a liquid filler, wherein the solid filler includes resin oil and the liquid filler includes cooling lubricating oil.

[0016] As described above, a bottom suction pump has a rotor end provided with agitating blades and / or agitating columns for stirring within the second filling chamber.

[0017] The beneficial effects of this application are:

[0018] This invention provides a bottom-suction water pump that separates the stator and rotor by using a protective cover to divide a first filling chamber and a second filling chamber. The stator is placed in the first filling chamber filled with resin oil, achieving insulation and moisture protection. The rotor is placed in the second filling chamber filled with cooling lubricating oil, focusing on lubrication and heat dissipation, and also effectively preventing contaminant intrusion, thus improving service life. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below.

[0020] Figure 1 This is a half-sectional view of this application. Detailed Implementation

[0021] To make the technical problems solved, technical solutions, and beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0022] A bottom suction water pump, including

[0023] Motor 1 includes a housing 11, a protective cover 12 disposed within the housing 11, and a lower cover 13 sealed to the housing 11 and the protective cover 12. A first filling cavity 14 is formed between the housing 11 and the protective cover 12, and a second filling cavity 15 is formed within the protective cover 12. A stator 16 is disposed within the first filling cavity 14, and a rotor 17 is disposed within the second filling cavity 15. A rotating shaft 18 is disposed on the rotor 17, and blades 19 are disposed at the end of the rotating shaft 18.

[0024] Pump body 2 is connected to motor 1; pump body 2 is provided with pumping chamber 21, and water outlet 22 and water inlet 23 communicating with pumping chamber 21, and blade 19 is located in pumping chamber 21.

[0025] This invention provides a bottom-suction water pump that separates the stator and rotor by using a protective cover to divide a first filling chamber and a second filling chamber. The stator is placed in the first filling chamber filled with resin oil, achieving insulation and moisture protection. The rotor is placed in the second filling chamber filled with cooling lubricating oil, focusing on lubrication and heat dissipation, and also effectively preventing contaminant intrusion, thus improving service life.

[0026] Furthermore, as a preferred embodiment of this solution and not a limitation, the lower cover 13 is provided with a port 131 for fitting over the outside of the opening of the protective cover 12, and an end cap 3 covering the port 131. The end cap 3 is provided with an oil drain port 31 connecting the second filling cavity 15 to the outside, and a sealing screw 32 for sealing the oil drain port 31. The independent oil drain port design of the end cap allows for lubricant replacement without disassembly, significantly reducing maintenance costs; the double locking of the sealing screw and the end cap ensures absolute sealing of the first and second filling cavities during underwater operations.

[0027] Furthermore, as a preferred embodiment of this solution and not a limitation, the protective cover 12 has an edge 121 extending outward in the circumferential direction at its opening, and the end cap 3 has a first groove 33. A first sealing ring 34 is provided between the edge 121 and the first groove 33. When the end cap 3 is connected to the lower cover 13, it presses against the edge 121. The edge 121 of the protective cover and the groove 33 of the end cap cooperate to form a sealing groove, which, in conjunction with the first sealing ring 34, is effectively compressed when the end cap is tightened, ensuring a reliable static seal at the opening of the second filling cavity 15 and preventing leakage of liquid filler.

[0028] Furthermore, as a preferred embodiment of this solution and not a limitation, a sealing gasket 35 is provided between the end cover 3 and the lower cover 13. The sealing gasket 35 is disposed between the mounting surfaces of the end cover 3 and the lower cover 13, effectively preventing external liquids or impurities from seeping into the motor interior or filling cavity from this mating surface.

[0029] Furthermore, as a preferred embodiment of this solution and not a limitation, the bottom of the protective cover 12 is provided with a first bearing 4 between it and the rotating shaft 18, and the end cap 3 is provided with a second bearing 5 between it and the rotating shaft 18. The first bearing 4 and the second bearing 5 are respectively provided at both ends of the rotating shaft 18 (the bottom of the protective cover and the end cap), providing stable bidirectional support for the rotating shaft, ensuring smooth operation, and reducing vibration and noise.

[0030] Furthermore, as a preferred embodiment of this solution and not a limitation, the end cap 3 is provided with a through hole 36 through which the rotating shaft 18 passes. The rotating shaft 18 is provided with an upper mechanical seal 24 for sealing the through hole 36, a lower mechanical seal 25 that cooperates with the upper mechanical seal 24, and a spring 26 for pressing the lower mechanical seal 25. A mechanical seal sealing ring 27 is provided between the end cap 3 and the upper mechanical seal 24. The mechanical seal composed of the upper mechanical seal 24 and the lower mechanical seal 25, pre-tightened by the spring 26, combined with the mechanical seal sealing ring 27, forms a highly efficient seal at the critical dynamic sealing point where the rotating shaft 18 passes through the through hole 36 of the end cap, effectively preventing the liquid filler in the second filling cavity 15 (rotor cavity) from leaking outward and preventing external water or impurities from entering.

[0031] Furthermore, as a preferred embodiment of this solution and not a limitation, the bottom of the protective cover 12 narrows to form a mounting cavity 122 for the first bearing 4 to be embedded. The mounting cavity 122 formed by the narrowing bottom of the protective cover 12 provides precise positioning and stable mounting support for the first bearing 4, ensuring reliable bearing operation.

[0032] Furthermore, as a preferred embodiment of this solution and not a limitation, the motor 1 also includes an upper housing 7, on which a fixing bracket 8 is provided, and the fixing bracket 8 is provided with a slot 81 for the bottom of the protective cover 12 to be inserted. The slot 81 on the fixing bracket 8 is designed so that the bottom of the protective cover 12 can be accurately and conveniently inserted and positioned during assembly, thereby improving assembly efficiency and structural stability.

[0033] Furthermore, as a preferred embodiment of this solution and not a limitation, the first filling cavity 14 is used to fill with solid filler, and the second filling cavity 15 is used to fill with liquid filler. Filling the first filling cavity 14, where the stator is located, with solid filler (such as resin oil) can effectively seal, insulate, and fix the stator; filling the second filling cavity 15, where the rotor is located, with liquid filler (such as cooling lubricating oil) can directly cool the rotor, lubricate the bearings, and other moving parts and transfer heat. Solid fillers include, but are not limited to, epoxy resin potting compound, polyurethane potting compound, silicone potting compound, and other materials that form a solid sealing and insulating layer after curing. Liquid fillers include, but are not limited to, mineral insulating oil, synthetic ester insulating oil, silicone oil, and other liquids with good insulation, thermal conductivity, and lubrication properties.

[0034] Furthermore, as a preferred embodiment of this solution and not a limitation thereof, the solid filler includes resin oil, and the liquid filler includes cooling lubricating oil. After curing, the resin oil forms a robust sealing layer, providing excellent insulation, moisture protection, fixation, and heat dissipation for the stator; the cooling lubricating oil has good fluidity, thermal conductivity, and lubricity, effectively cooling the rotor, lubricating the bearings, and removing frictional heat, thus extending the motor's lifespan.

[0035] Furthermore, as a preferred embodiment of this solution and not a limitation thereof, the rotor 17 is provided with agitating blades 172 and / or agitating columns 171 at its end for stirring within the second filling cavity 15. When the rotor rotates, it drives the agitating blades and / or agitating columns to stir the cooling lubricating oil, thereby cooling the bearing and providing lubrication.

[0036] Furthermore, as a preferred embodiment of this solution and not a limitation, the end cap is made of metal. In this example, the end cap is made of stainless steel, which increases the strength of the rotor motor and allows for rapid heat conduction when in contact with water, thereby cooling the rotor and the cooling lubricating oil.

[0037] The above description is only a preferred embodiment of this application and is not intended to limit the scope of implementation of this application. Any other embodiments whose principles and basic structures are the same as or similar to those of this application are within the protection scope of this application.

Claims

1. A bottom suction water pump, characterized in that: include The motor (1) includes a housing (11), a protective cover (12) disposed inside the housing (11), and a lower cover (13) sealed to the housing (11) and the protective cover (12). A first filling cavity (14) is formed between the housing (11) and the protective cover (12), and a second filling cavity (15) is formed inside the protective cover (12). A stator (16) is disposed in the first filling cavity (14), and a rotor (17) is disposed in the second filling cavity (15). A rotating shaft (18) is disposed on the rotor (17), and blades (19) are disposed at the end of the rotating shaft (18). The pump body (2) is connected to the motor (1); the pump body (2) is provided with a pumping chamber (21), and an outlet (22) and an inlet (23) connecting the pumping chamber (21), and the blade (19) is located in the pumping chamber (21).

2. A bottom suction water pump according to claim 1, characterized in that: The lower cover (13) is provided with a port (131) for fitting outside the opening of the protective cover (12), and an end cap (3) covering the port (131). The end cap (3) is provided with an oil drain port (31) connecting the second filling cavity (15) to the outside, and a sealing screw (32) for sealing the oil drain port (31).

3. A bottom suction water pump according to claim 2, characterized in that: The protective cover (12) has an edge (121) extending outward in the circumferential direction at the opening. The end cap (3) has a first groove (33). A first sealing ring (34) is provided between the edge (121) and the first groove (33). When the end cap (3) is connected to the lower cover (13), the edge (121) is pressed against it.

4. A bottom suction pump according to claim 2, characterized in that: A sealing gasket (35) is provided between the end cap (3) and the lower cap (13).

5. A bottom suction pump according to claim 2, characterized in that: The bottom of the protective cover (12) is provided with a first bearing (4) between it and the rotating shaft (18), and the end cover (3) is provided with a second bearing (5) between it and the rotating shaft (18).

6. A bottom suction pump according to claim 5, characterized in that: The end cap (3) is provided with a through hole (36) through which the rotating shaft (18) passes. The rotating shaft (18) is provided with an upper mechanical seal (24) for sealing the through hole (36), a lower mechanical seal (25) that cooperates with the upper mechanical seal (24), and a spring (26) for pressing the lower mechanical seal (25). A mechanical seal sealing ring (27) is provided between the end cap (3) and the upper mechanical seal (24).

7. A bottom suction pump according to claim 5, characterized in that: The bottom of the protective cover (12) narrows to form a mounting cavity (122) for the first bearing (4) to be embedded.

8. A bottom suction water pump according to claim 1, characterized in that: The motor (1) also includes an upper shell (7), on which a fixed bracket (8) is provided, and the fixed bracket (8) is provided with a slot (81) for the bottom of the protective cover (12) to be inserted.

9. A bottom suction water pump according to claim 1, characterized in that: The first filling cavity (14) is used to fill solid filler, and the second filling cavity (15) is used to fill liquid filler, wherein the solid filler includes resin oil and the liquid filler includes cooling lubricating oil.

10. A bottom suction pump according to claim 1, characterized in that: The rotor (17) is provided with stirring blades (172) and / or stirring columns (171) at its end for stirring in the second filling cavity (15).

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