A booster pump

Abstract

The present invention provides a booster pump, which belongs to the field of pump technology. It solves the technical problems that the boosting effect of the existing booster pump is not obvious. The booster pump includes a motor housing, the motor housing is fixedly connected to the pump housing, the motor housing is molded and wrapped with a stator assembly, a shielding sleeve is fixedly connected between the motor housing and the pump housing, a pump chamber is formed between the pump housing and the shielding sleeve, a runner assembly is arranged in the pump chamber, the runner assembly includes a rotor assembly and an impeller, the rotor assembly and the stator assembly are arranged relatively, the upper end of the shielding sleeve protrudes toward the runner assembly with an axis fixing part 1, a drainage frame is fixedly arranged relative to the axis fixing part 1 in the pump housing, the upper end of the drainage frame is molded with an axis fixing part 2 toward the axis fixing part 1, the fixing part 1 and the axis fixing part 2 are fixedly connected with a fixed shaft, the runner assembly is fixedly connected with a rotating assembly, and the rotating sleeve of the rotating assembly is arranged outside the fixed shaft. The present invention has the advantages of stabilizing the output pressure and improving the flow stability of the booster pump.

Description

Technical Field

[0001] The invention belongs to the technical field of pumps, and in particular relates to a booster pump. Background Art

[0002] A booster pump is a pump used to increase the pressure of liquid in a piping system. The booster pump increases the flow and pressure of the liquid by rotating the impeller.

[0003] In the prior art, a booster pump with publication number CN115163506A includes a turbine assembly and a driving mechanism, the turbine assembly includes a casing and blades, the blades are mounted on the casing, the driving mechanism is connected to the turbine assembly, the driving mechanism includes a protective shell and a driving mechanism, a receiving cavity is provided in the protective shell, the driving assembly is mounted in the receiving cavity and connected to the blades to drive the blades. However, when the pipeline flow of the booster pump cannot keep up with the flow of the pump or exceeds the flow of the pump, the boosting effect will not be obvious. Summary of the invention

[0004] In view of the shortcomings of the prior art, the purpose of the present invention is to provide a booster pump. The technical problem to be solved by the present invention is how to stabilize the output pressure of the booster pump and improve the flow stability of the booster pump.

[0005] The purpose of the present invention can be achieved through the following technical solutions: a booster pump, including a motor housing, the motor housing is fixedly connected to a pump housing, a stator assembly is molded inside the motor housing, a shielding sleeve is fixedly connected between the motor housing and the pump housing, a pump chamber is formed between the pump housing and the shielding sleeve, a runner assembly is arranged in the pump chamber, the runner assembly includes a rotor assembly and an impeller, the rotor assembly and the stator assembly are arranged relatively, an upper end of the shielding sleeve protrudes toward the runner assembly with an axis fixing portion 1, a drainage frame is fixedly arranged relative to the axis fixing portion 1 in the pump housing, an axis fixing portion 2 is molded toward the axis fixing portion 1 at the upper end of the drainage frame, a fixed shaft is fixedly connected to the fixed portion 1 and the axis fixing portion 2, the runner assembly is fixedly connected to a rotating assembly, and the rotating sleeve of the rotating assembly is arranged outside the fixed shaft. The motor housing, pump housing, runner assembly and other components adopt a modular design for easy disassembly and maintenance. In this solution, the stator assembly is integrated with the motor housing through an injection molding process. The motor housing and the pump housing are fixed to make the stator assembly more stable during operation. The pump cavity formed between the pump housing and the shielding sleeve is filled with liquid, which can better dissipate heat and seal the stator assembly and the rotor assembly, ensure the stable operation of the motor, stabilize the output pressure of the booster pump, and improve the flow stability of the booster pump.

[0006] Furthermore, the pump housing is provided with a liquid inlet channel and a liquid outlet channel connected to the pump chamber, the drainage frame is fixedly provided on the liquid inlet connecting the liquid inlet channel and the pump chamber, a plurality of passage holes are provided on the drainage frame, and a transition chamber is formed at one end of the runner assembly close to the drainage frame, and the transition chamber is connected to the passage holes. The transition chamber has a certain space for storing liquid, and when the liquid flow is too large or too small, the liquid in the transition chamber can be better supplemented, so that the booster pump can output a stable pressure.

[0007] Furthermore, a drainage groove is formed on the drainage frame, and a limiting flow ring is formed toward the drainage groove by the runner assembly. The limiting flow ring is suspended and embedded in the drainage groove, and a limiting flow channel is formed between the limiting flow ring and the drainage groove, and the limiting flow channel connects the pump cavity and the transition cavity. Through the limiting flow channel formed by the limiting flow ring and the drainage groove, the water flow entering the pump cavity can be accurately controlled, the liquid flow rate and pressure distribution are effectively controlled, which is helpful to stabilize the output pressure and improve the flow stability of the booster pump.

[0008] Furthermore, the booster pump also includes a control box and a pressure switch, and the control box is electrically connected to the motor housing and the pressure switch respectively.

[0009] Furthermore, a stator wiring insert is fixedly arranged in the motor housing, an electric fixing block 1 protrudes from one end of the stator wiring insert, a plug-in piece 1 electrically connected to the stator assembly is fixedly arranged in the electric fixing block 1, a plug-in hole 1 cooperating with the electric fixing block 1 is arranged on the control box, the electric fixing block 1 is embedded in the plug-in hole 1, and a seal 1 is fixedly arranged between the electric fixing block 1 and the plug-in hole 1.

[0010] Furthermore, the pressure switch has a second electric fixing block protruding toward the control box, a second plug-in sheet is fixedly arranged inside the second electric fixing block, a second plug-in hole matching the second electric fixing block is arranged on the control box, the second electric fixing block is embedded in the second plug-in hole, and a second seal is fixedly arranged between the second electric fixing block and the second plug-in hole. The pressure switch can monitor the pressure in the pump cavity in real time, and automatically start and stop the pump according to the set value to ensure the stability of the system pressure.

[0011] Compared with the prior art, the technical effects of the present invention are as follows: 1. The flow-limiting channel formed by the flow-limiting ring and the drainage groove can accurately control the water flow entering the pump chamber, effectively control the liquid flow rate and pressure distribution, help stabilize the output pressure, and improve the flow stability of the booster pump. 2. The control box and the pressure switch realize the automatic control of the pump operation. When the pressure reaches the set value, the pressure switch is activated, and the start and stop of the motor are controlled by the control box, which saves energy and improves the automation level of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a stereogram of the present invention.

[0013] Figure 2It is a cross-sectional view of the present invention.

[0014] Figure 3 It is a three-dimensional diagram of the drainage frame of the present invention.

[0015] Figure 4 It is a cross-sectional view of the motor housing of the present invention.

[0016] Figure 5 It is an exploded view of the motor of the present invention.

[0017] Figure 6 It is a schematic diagram of the connection of the control box of the present invention.

[0018] Figure number marking: 1, motor housing; 102, groove; 2, pump housing; 201, liquid inlet channel; 202, liquid outlet channel; 203, liquid inlet; 3, stator assembly; 4, shielding sleeve; 401, shaft fixing part 1; 402, convex strip; 5, pump cavity; 6, runner assembly; 601, flow limiting ring; 7, rotor assembly; 8, impeller; 9, drainage frame; 901, shaft fixing part 2; 902, passage through hole; 903, drainage groove; 10, fixed shaft; 11, rotating assembly; 12, transition chamber; 13, current limiting channel; 14, control box; 1401, power plug hole one; 1402, power plug hole two; 15, pressure switch; 1501, power fixing block two; 16, stator wiring insert; 1601, power fixing block one; 17, seal one; 18, seal two; 19, power plug sheet one; 20, power plug sheet two. DETAILED DESCRIPTION

[0019] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0020] It should be noted that the descriptions of the present invention regarding directions such as “up”, “down”, “left”, “right”, “top” and “bottom” are all defined based on the relationships between the orientations or positions shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device must be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention.

[0021] according to Figures 1 to 6As shown, a booster pump comprises a motor housing 1, the motor housing 1 is fixedly connected to the pump housing 2, the motor housing 1 is internally molded to wrap the stator assembly 3, and the overall longitudinal section of the motor housing 1 is concave. A shielding sleeve 4 is fixedly connected between the motor housing 1 and the pump housing 2, the longitudinal section of the shielding sleeve 4 is concave, and the protruding part of the shielding sleeve 4 is embedded in the motor housing 1. The inner peripheral wall of the motor housing 1 has a groove 102, and the outer peripheral wall of the shielding sleeve 4 has a convex strip 402. The engagement of the convex strip 402 and the groove 102 can prevent the shielding sleeve 4 from rotating, and the shielding sleeve 4 and the pump housing 2 are sealed and fixed. A pump chamber 5 is formed between the pump housing 2 and the shielding sleeve 4, and a runner assembly 6 is arranged in the pump chamber 5. The runner assembly 6 includes a rotor assembly 7 and an impeller 8. The rotor assembly 7 includes a permanent magnet. The rotor assembly 7 and the impeller 8 are integrally molded by injection molding, wherein the rotor assembly 7 and the stator assembly 3 are arranged relative to each other. The inner periphery of the runner assembly 6 is fixedly connected to the rotating assembly 11, and the rotating assembly 11 is sleeved on the fixed shaft 10. The rotating assembly 11 is preferably a sliding bearing. The fixed shaft 10 is fixed between the shielding sleeve 4 and the drainage frame 9. The upper end of the shielding sleeve 4 protrudes the shaft fixing part 1 401 toward the runner assembly 6. The drainage frame 9 is fixedly arranged relative to the shaft fixing part 1 401 in the pump housing 2. The upper end of the drainage frame 9 forms the shaft fixing part 2 901 toward the shaft fixing part 1 401. The fixing part 1 and the shaft fixing part 2 901 are fixedly connected to the fixed shaft 10. The motor housing 1, the pump housing 2, the runner assembly 6 and other components adopt a modular design, which is convenient for disassembly and maintenance. In this scheme, the stator assembly 3 is formed into an integral part with the motor housing 1 through an injection molding process, and the rotor assembly 7 is formed into an integral part with the impeller 8 through an injection molding process. The motor housing 1 and the pump housing 2 are fixed to make the stator assembly 3 more stable during operation; the pump chamber 5 formed between the pump housing 2 and the shielding sleeve 4 is filled with liquid, which can better dissipate heat and seal the stator assembly 3 and the rotor assembly 7, ensure the stable operation of the motor, stabilize the output pressure of the booster pump, and improve the flow stability of the booster pump.

[0022] The pump housing 2 is provided with a liquid inlet channel 201 and a liquid outlet channel 202 connected to the pump chamber 5. The drainage frame 9 is fixedly provided on the liquid inlet 203 connected to the pump chamber 5 by the liquid inlet channel 201. The drainage frame 9 includes an annular boss seat. Above the annular boss seat is the second shaft fixing part 901. The annular boss seat and the second shaft fixing part 901 are fixedly connected by a plurality of irregular reinforcing ribs. Between two adjacent reinforcing ribs is an aisle through hole 902. The drainage frame 9 has a plurality of aisle through holes 902. A transition cavity 12 is formed at one end of the runner assembly 6 close to the drainage frame 9. The transition cavity 12 is connected to the aisle through hole 902. A drainage groove 903 is formed on the drainage frame 9. The drainage groove 903 is located on the annular boss seat. The runner assembly 6 forms a limiting flow ring 601 toward the drainage groove 903, and the limiting flow ring 601 is suspended and embedded in the drainage groove 903. A limiting flow channel 13 is formed between the limiting flow ring 601 and the drainage groove 903, and the limiting flow channel 13 connects the pump chamber 5 and the transition chamber 12. The limiting flow channel 13 formed by the limiting flow ring 601 and the drainage groove 903 can accurately control the water flow entering the pump chamber 5, effectively control the liquid flow rate and pressure distribution, help stabilize the output pressure, and improve the flow stability of the booster pump.

[0023] The booster pump also includes a control box 14 and a pressure switch 15, and the control box 14 is electrically connected to the motor housing 1 and the pressure switch 15 respectively. A stator wiring insert 16 is fixedly arranged in the motor housing 1, and the stator wiring insert 16 is fixed to the motor housing 1 by injection molding. An electric fixing block 1601 protrudes from one end of the stator wiring insert 16, and a plug-in sheet 19 electrically connected to the stator assembly 3 is fixedly arranged in the electric fixing block 1601. A plug-in hole 1401 matching with the electric fixing block 1601 is arranged on the control box 14, and the electric fixing block 1601 is embedded in the plug-in hole 1401, and a seal 17 is fixedly arranged between the electric fixing block 1601 and the plug-in hole 1401. The pressure switch 15 has an electric fixing block 1501 protruding toward the control box 14, and a plug-in sheet 20 is fixedly arranged inside the electric fixing block 1501. The control box 14 is provided with a plug-in hole 1402 that matches the electric fixing block 1501. The electric fixing block 1501 is embedded in the plug-in hole 1402, and a seal 18 is fixedly arranged between the electric fixing block 1501 and the plug-in hole 1402. The pressure switch 15 can monitor the pressure in the pump chamber 5 in real time, and automatically start and stop the pump according to the set value to ensure the stability of the system pressure. A general booster pump is to connect the main power line (three-phase or single-phase) to the power input terminal of the control box 14; then connect the output terminal of the control box 14 to the corresponding terminal of the booster pump motor, and then connect the output signal line of the pressure switch 15 to the control terminal of the control box 14. The present invention directly plugs and connects the electric fixing block 1 1601 and the electric fixing block 2 1501 to the control box 14, thereby eliminating the complicated operations required for traditional wiring terminals, making installation more convenient and reducing the risk of wiring errors. The connection between the control box 14 and the motor and pressure switch 15 is more compact, reducing external cables, making the overall structure simpler, and saving installation space.

[0024] The above embodiments are only preferred embodiments of the present invention and are not intended to limit the protection scope of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the protection scope defined by the claims of the present invention.

Claims

1. A booster pump, comprising a motor housing (1), wherein the motor housing (1) is fixedly connected to a pump housing (2), characterized in that: The motor housing (1) is internally molded to enclose the stator assembly (3); a shielding sleeve (4) is fixedly connected between the motor housing (1) and the pump housing (2); a pump chamber (5) is formed between the pump housing (2) and the shielding sleeve (4); a runner assembly (6) is arranged in the pump chamber (5); the runner assembly (6) includes a rotor assembly (7) and an impeller (8); the rotor assembly (7) and the stator assembly (3) are arranged opposite to each other; an upper end of the shielding sleeve (4) protrudes toward the runner assembly (6) A shaft fixing part (401) is provided, a drainage frame (9) is fixedly arranged in the pump housing (2) relative to the shaft fixing part (401), a shaft fixing part (901) is formed at the upper end of the drainage frame (9) toward the shaft fixing part (401), the fixing part (1) and the shaft fixing part (901) are fixedly connected to a fixed shaft (10), the impeller assembly (6) is fixedly connected to a rotating assembly (11), and the rotating assembly (11) is rotatably sleeved outside the fixed shaft (10).

2. A booster pump according to claim 1, characterized in that: The pump housing (2) is provided with a liquid inlet channel (201) and a liquid outlet channel (202) which are in communication with the pump chamber (5); a drainage frame (9) is fixedly arranged on a liquid inlet (203) which is in communication with the liquid inlet channel (201) and the pump chamber (5); a plurality of passage holes (902) are provided on the drainage frame (9); a transition chamber (12) is formed at one end of the runner assembly (6) close to the drainage frame (9); and the transition chamber (12) is in communication with the passage holes (902).

3. A booster pump according to claim 2, characterized in that: A drainage groove (903) is formed on the drainage frame (9), and a limiting flow ring (601) is formed on the rotor assembly (6) toward the drainage groove (903). The limiting flow ring (601) is suspended and embedded in the drainage groove (903). A limiting flow channel (13) is formed between the limiting flow ring (601) and the drainage groove (903), and the limiting flow channel (13) communicates with the pump chamber (5) and the transition chamber (12).

4. A booster pump according to claim 1, 2 or 3, characterized in that: The booster pump further comprises a control box (14) and a pressure switch (15), and the control box (14) is electrically connected to the motor housing (1) and the pressure switch (15) respectively.

5. A booster pump according to claim 4, characterized in that: A stator wiring insert (16) is fixedly arranged in the motor housing (1), an electric fixing block (1601) protrudes from one end of the stator wiring insert (16), a plug-in plate (19) electrically connected to the stator assembly (3) is fixedly arranged in the electric fixing block (1601), a plug-in hole (1401) matching with the electric fixing block (1601) is arranged on the control box (14), the electric fixing block (1601) is embedded in the plug-in hole (1401), and a sealing member (17) is fixedly arranged between the electric fixing block (1601) and the plug-in hole (1401).

6. A booster pump according to claim 5, characterized in that: The pressure switch (15) has an electric fixing block (1501) protruding toward the control box (14), and a plug-in sheet (20) is fixedly arranged inside the electric fixing block (1501). A plug-in hole (1402) matching the electric fixing block (1501) is arranged on the control box (14), and the electric fixing block (1501) is embedded in the plug-in hole (1402). A seal (18) is fixedly arranged between the electric fixing block (1501) and the plug-in hole (1402).

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