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CN-121993383-A - Brushless permanent magnet synchronous variable frequency diaphragm booster pump

CN121993383ACN 121993383 ACN121993383 ACN 121993383ACN-121993383-A

Abstract

The application discloses a brushless permanent magnet synchronous variable-frequency diaphragm booster pump, which relates to the technical field of water pump equipment and comprises a motor assembly, a shell assembly, an action assembly, a valve assembly and a discharge valve assembly, wherein the action assembly comprises an eccentric wheel, a fixed frame and an elastic diaphragm, a plurality of piston cavities are logarithmically arranged in the fixed frame, balance wheels matched with the elastic diaphragm to push the elastic diaphragm to reciprocate are arranged in the piston cavities, the valve assembly comprises a control body, a plurality of suction valves are arranged on one side of the control body, a plurality of discharge valves are arranged on the other side of the control body, and a plurality of valve plates are flexibly connected to the surface of the discharge valves.

Inventors

  • XU LIANG
  • Qiao Guanfei
  • ZHANG MENGQI
  • WANG JIAHUI

Assignees

  • 龙口利佳电气有限公司

Dates

Publication Date
20260508
Application Date
20260408

Claims (9)

  1. 1. A brushless permanent magnet synchronous variable frequency diaphragm booster pump, comprising: The motor assembly (1) comprises a plastic package BMC motor stator assembly (11) and a motor rotor (12); the shell component (2) comprises a lower shell (21) and a pump head shell (22), and the lower shell and the pump head shell are arranged at the upper end of the motor component (1) in a matched manner; The action assembly (3) comprises an eccentric wheel (31), a fixing frame (32) and an elastic diaphragm (33), a plurality of piston cavities are arranged in the fixing frame (32) in pairs, and balance wheels which are matched with the elastic diaphragm (33) to push the elastic diaphragm to reciprocate are arranged in the piston cavities; The valve assembly (4) comprises a control body (41), wherein one side of the control body (41) is provided with a plurality of suction valves (42), the other side of the control body is provided with a discharge valve (43), and the surface of the discharge valve (43) is flexibly connected with a plurality of valve plates (4301); One side of the control body (41) is provided with a plurality of pressurizing cavities (4101) which are in one-to-one correspondence with the piston cavities, a suction valve (42) is arranged in the pressurizing cavities (4101), a plurality of water inlet holes (4102) are formed in the surface of the pressurizing cavities (4101), a discharge cavity (4103) is formed in the center of the other side of the control body (41), a discharge valve (43) is arranged in the discharge cavity (4103), a plurality of water outlet holes (4105) are formed in the surface of the discharge cavity (4103), and an O-shaped ring (4106) is further arranged at the joint edge of the discharge cavity (4103) and the control body (41); The discharge cavity (4103) is also internally provided with a plurality of partition sides (4104), corresponding water outlet areas are formed between the adjacent partition sides (4104), and each valve plate (4301) of the discharge valve (43) is arranged in the corresponding water outlet area in a sealing way.
  2. 2. The brushless permanent magnet synchronous variable-frequency diaphragm booster pump of claim 1, wherein the eccentric wheel (31) is sleeved on an output shaft of the motor rotor (12) and is inserted into the fixed frame (32), a bearing (3101) is further arranged in the fixed frame (32), the eccentric wheel (31) is sleeved in the bearing (3101), a bearing pressing plate (3102) matched with the fixed bearing (3101) is further arranged at the bottom of the fixed frame (32), and the eccentric wheel (31) can sequentially push balance wheels in corresponding piston cavities to move when rotating; the motor assembly (1) further comprises a motor end cover (13), and the motor end cover (13) is matched with the fixing frame (32) to be pressed in the lower shell (21).
  3. 3. The brushless permanent magnet synchronous variable frequency diaphragm booster pump of claim 1, wherein a plurality of pistons (34) are further installed in the elastic diaphragm (33), the pistons (34) correspond to positions of piston cavities in the fixing frame (32) one by one, and a diaphragm protection pad (3301) is further arranged between the elastic diaphragm (33) and the fixing frame (32).
  4. 4. The brushless permanent magnet synchronous variable frequency diaphragm booster pump of claim 1, wherein the lower shell (21) is composed of a plastic silencing shell (2101) and an aluminum alloy middle frame (2102), the plastic silencing shell (2101) is wrapped on the outer surface of the aluminum alloy middle frame (2102) through injection molding, and a lower shell sealing ring (2104) is further arranged in a joint of the plastic silencing shell (2101) and the aluminum alloy middle frame (2102).
  5. 5. The brushless permanent magnet synchronous variable frequency diaphragm booster pump of claim 4, wherein the edge shell of the plastic silencing shell (2101) adopts a double-layer wall structure, and a plurality of sound insulation cavities (2103) are arranged between the double-layer wall structure; the aluminum alloy middle frame (2102) is also provided with a perforation for the piston cavity in the fixing frame (32) to pass through.
  6. 6. The brushless permanent magnet synchronous variable frequency diaphragm booster pump of claim 1, wherein a water inlet (2201) and a water outlet (2202) are further formed in the outer side of the pump head shell (22), the water inlet (2201) and the water outlet (2202) are positioned on the same straight line, and an upper space and a lower space are separated in the pump head shell (22); the lower part space of the pump head shell (22) is communicated with the water inlet (2201) and the pressurizing cavity (4101); the upper space of the pump head shell (22) is communicated with the water outlet (2202) and the discharge cavity (4103).
  7. 7. The brushless permanent magnet synchronous variable frequency diaphragm booster pump of claim 1, wherein a pressure adjusting cavity (2203) is further arranged in the upper part space of the pump head shell (22), a control cover (2208) is mounted on the top of the pressure adjusting cavity (2203) through a screw, and a pressure adjusting component is arranged in the control cover (2208).
  8. 8. The brushless permanent magnet synchronous variable frequency diaphragm booster pump of claim 7, wherein the pressure regulating assembly comprises a control handle (2207), a pre-pressing spring (2206), a spring pad (2205) and a sealing pad (2204), the spring pad (2205) is fixed on one side of the sealing pad (2204), the pre-pressing spring (2206) is installed between the control handle (2207) and the sealing pad (2204), and the control handle (2207) is abutted to the control cover (2208) to form fixation.
  9. 9. The brushless permanent magnet synchronous variable frequency diaphragm booster pump of claim 1, wherein a hoop (15) is further sleeved on the outer surface of the plastic package BMC motor stator assembly (11), a support base (14) is further sleeved on a part of the hoop (15), and the support base (14) is attached to the surface of the plastic package BMC motor stator assembly (11); A plurality of positioning bosses (1101) are further arranged around the outer surface of the plastic package BMC motor stator assembly (11), and a plurality of positioning clamping grooves (1401) matched with the positioning bosses (1101) are formed in the bracket base (14); two sides of the bracket base (14) horizontally extend outwards to form a base plate, and feet (1402) are arranged at the end positions of the base plate through screws.

Description

Brushless permanent magnet synchronous variable frequency diaphragm booster pump Technical Field The application relates to the technical field of water pump equipment, in particular to a brushless permanent magnet synchronous variable-frequency diaphragm booster pump. Background The diaphragm booster pump is a positive displacement pump that uses a flexible diaphragm to reciprocate to raise the pressure of a low pressure medium (liquid or gas) to a high pressure. The device converts driving energy (motor, compressed air or hydraulic pressure) into reciprocating displacement of a diaphragm, so as to realize suction-compression-discharge circulation of a medium, thereby providing a required pressurizing effect in a system, and a brushless direct current motor driven by a Permanent Magnet Synchronous Motor (PMSM) can be matched with a variable frequency controller to realize accurate speed regulation of the reciprocating motion of the diaphragm, thereby generating adjustable positive pressure or negative pressure in a pump body to realize liquid pressurizing, and adopting a brushless permanent magnet synchronous variable frequency driving mode, so that the abrasion defect of an electric brush can be eliminated, and the service life and energy efficiency of the device are greatly improved. The common diaphragm booster pump is through driving eccentric wheel subassembly rotation, the piston actuation area of diaphragm can receive the axial reciprocating motion of balance to carry out synchronous axial dilatation or compression motion, when diaphragm piston actuation area moved to the dilatation direction, the check valve that intakes was opened, the source water is inhaled the pressurized water cavity by the water inlet, when diaphragm piston actuation area moved to the compression direction, the check valve that drains was opened, the water after the pressure boost is pressed out, get into the high-pressure water cavity by the outlet, outside the pump is discharged through pump head cap discharge port, provide required high-pressure water. However, the inventor realizes that, because the structure inside the pump body is compact, only one drainage check valve is usually arranged, when the eccentric wheel is matched to push the pistons to reciprocate, the two pistons which keep symmetry move in opposite directions, and the drainage check valve can drain water from one side in an inclined way, so that the drainage check valve needs to change the inclined direction continuously while opening and closing, the situation of loose sealing is easy to occur, and the drainage check valve is seriously blocked. Based on the problems, we provide a brushless permanent magnet synchronous variable frequency diaphragm booster pump. Disclosure of Invention In order to solve the problems in the background technology, the application provides a brushless permanent magnet synchronous variable frequency diaphragm booster pump. The application provides a brushless permanent magnet synchronous variable frequency diaphragm booster pump which adopts the following technical scheme: A brushless permanent magnet synchronous variable frequency diaphragm booster pump comprising: The motor assembly comprises a plastic package BMC motor stator assembly and a motor rotor; The shell component comprises a lower shell and a pump head shell, and the lower shell and the pump head shell are arranged at the upper end of the motor component in a matched manner; the action assembly comprises an eccentric wheel, a fixing frame and an elastic diaphragm, a plurality of piston cavities are logarithmically arranged in the fixing frame, and balance wheels which are matched with the elastic diaphragm to push the elastic diaphragm to reciprocate are arranged in the piston cavities; the valve assembly comprises a control body, wherein one side of the control body is provided with a plurality of suction valves, the other side of the control body is provided with a discharge valve, and the surface of the discharge valve is flexibly connected with a plurality of valve plates. In some embodiments, one side of the control body is provided with a plurality of pressurizing cavities corresponding to the piston cavities one by one, the suction valve is arranged in the pressurizing cavities, the surface of the pressurizing cavity is provided with a plurality of water inlets, the center of the other side of the control body is provided with a discharge cavity, the discharge valve is arranged in the discharge cavity, the surface of the discharge cavity is provided with a plurality of water outlets, and the joint edge of the discharge cavity and the control body is also provided with an O-shaped ring; The discharge cavity is also internally provided with a plurality of partition edges, a corresponding water outlet area is formed between the adjacent partition edges, and each valve plate of the discharge valve is hermetically arranged in the corresponding water outlet area.