Two-dimensional motor piston pump

Patent metadata

Field	Value
Publication number	US-11891997-B2
Application number	US-202318314150-A
Country	US
Kind code	B2
Filing date	May 9, 2023
Priority date	May 19, 2022
Publication date	Feb 6, 2024
Grant date	Feb 6, 2024

Abstract

The present disclosure provides a two-dimensional motor piston pump, including a two-dimensional motor and a two-dimensional piston pump. The two-dimensional motor and the two-dimensional piston pump are nested with each other and arranged coaxially. The two-dimensional motor includes a stator and an outer rotor, and the outer rotor is coaxial with the stator and is sleeved outside the stator. The two-dimensional piston pump includes: a flow distribution mechanism including a flow distribution rotor and a pump body, a piston mechanism including a left cam and a right cam; a roller assembly including a roller and a roller shaft, and a pump housing, a left end cover, and a right end cover.

First claim

What is claimed is:

1. A two-dimensional motor piston pump comprising: a two-dimensional motor and a two-dimensional piston pump; wherein the two-dimensional motor and the two-dimensional piston pump are nested with each other and arranged coaxially;
wherein the two-dimensional motor comprises a stator and an outer rotor, and the outer rotor is coaxial with the stator and is sleeved outside the stator, the stator comprises a left stator and a right stator;
wherein the two-dimensional piston pump comprises:
a flow distribution mechanism that is comprising a flow distribution rotor and a pump body;
a piston mechanism that is comprising a left cam and a right cam; wherein an inner surface of the left cam forms a gap seal with an outer surface of the left stator, defining a left volume chamber in cooperation with the flow distribution rotor; an inner surface of the right cam forms a gap seal with an outer surface of the right stator, defining a right volume chamber in cooperation with the flow distribution rotor;
a roller assembly, including a plurality of sets of rollers and roller shafts; wherein each set of the plurality of sets comprises one roller and one roller shaft, two sets of the plurality of sets of rollers and roller shafts are fixed to the left stator, another two sets of the plurality of sets of rollers and roller shafts are fixed to the right stator, and rollers of the two sets of the plurality of sets of rollers and roller shafts are connected to concave and convex surfaces of the left cam, rollers of the another two sets of the plurality of sets of rollers and roller shafts are connected to concave and convex surfaces of the right cam; and
a pump housing, a left end cover, and a right end cover; wherein the pump housing is sleeved outside the pump body, and the pump housing defines a first flow channel port and a second flow channel port; the first flow channel port communicates with a first annular groove on the pump body, and the second flow channel port communicates with a second annular groove on the pump body; the left end cover and the right end cover are respectively arranged on both sides of the pump housing and are fixedly fitted to the pump housing, stator, and roller assembly.

2. The two-dimensional motor piston pump according to claim 1 , wherein the stator comprises the left stator, the right stator, a stator coil, and a wire and a controller;
wherein an end of the left stator is arranged with a fine shaft, and an end of the fine shaft is threaded;
the right stator is coaxially fixed to the left stator by being threaded to the end of the fine shaft;
the stator coil comprises windings, a cage, and a silicon steel sheet; a portion of the stator coil defines a core hole through the stator coil, the core hole passes through the fine shaft and the portion of the stator coil that defines the core hole is placed between the left stator and the right stator, and the stator coil is coaxially fixed to the left stator and the right stator by a first positioning pin;
the wire and controller are drawn out from a hole on the shaft of the left stator.

3. The two-dimensional motor piston pump according to claim 1 , wherein the outer rotor comprises:
the flow distribution rotor that is coaxially sleeved outside the stator;
a plurality of permanent magnets being fixed at equal intervals on an inner wall of the flow distribution rotor; and
the left cam and the right cam, fixedly connected with a left end surface and a right end surface of the flow distribution rotor through second positioning pins, respectively.

4. The two-dimensional motor piston pump according to claim 3 , wherein an outer surface of the flow distribution rotor defines four evenly distributed grooves, and an angle occupied by each groove in a circumferential direction is 45°;
a group of two opposite grooves among the four grooves is a first groove and opens to the left end surface of the flow distribution rotor, and a group of the other two opposite grooves among the four grooves is a second groove and opens to the right end surface of the flow distribution rotor.

5. The two-dimensional motor piston pump according to claim 1 , wherein the first annular groove of the pump body and the second annular groove of the pump body are symmetrically arranged in a circumferential direction, and four evenly distributed square through holes are defined between the first annular groove and the second annular groove; an angle occupied by each through hole in a circumferential width is 45°; a group of two opposite through holes among the four through holes is a first through hole and communicates with the first annular groove, and a group of the other two opposite through holes among the four through holes is a second through hole and communicates with the second annular groove.

Assignees

• Univ Zhejiang
• Hangzhou City Univ
• Univ Wenzhou

Inventors

• Zuo Qiang
• Leng Longlong
• Jin Qilin
• Ren Yan
• Deng Zhuhua
• Shao Wei
• Li Quankun
• Wang Pengfei
• Wang Zheng
• Lou Liying
• Zhao Yanwei

Classifications

• F04C9/00 Primary

  Oscillating-piston machines or pumps (such pumps specially adapted for elastic fluids F04C21/00) · CPC title

• H02K1/2786

  Outer rotors · CPC title

• H02K7/14

  Structural association with mechanical loads, e.g. with hand-held machine tools or fans (with fan or impeller for cooling the machine H02K9/06) · CPC title

• F04C2240/30

  Casings or housings · CPC title

• F04C2240/40

  Electric motor · CPC title