Title:
VARIABLE DISPLACEMENT PUMP, DRIVING DEVICE FORMED OF PUMP, AND DRIVING METHOD OF DRIVING DEVICE
Document Type and Number:
WIPO Patent Application WO/2021/184344
Kind Code:
A1
Abstract:
A variable displacement pump, a variable speed driving device formed of the pump, and a driving method of the driving device. Inside an impeller pump, a fixed wall piece (21), a movable wall piece (22), and a movable vane chamber sleeve (23) are combined into a vane chamber body (2) having at least one vane chamber (230), and the vane chamber body forms, together with a vane rotor (3) provided in the vane chamber body (2), a variable displacement pump in which the vane chamber (230) can expand and contract in the axial direction of the vane rotor (3). Moreover, at least two variable displacement pumps are communicated with each other to form a closed loop in which an active pump (101) drives a passive pump (102). During operation, when there is a difference between the driving force of the active pump (101) and the load resistance of the passive pump (102), the vane chambers (230) of the active and passive pumps (101), (102) can be automatically expanded and contracted until the above driving force and load resistance reach a balance. Moreover, under the condition that the fluid displacements per unit time of the active and passive pumps are nearly equal, the capacity and speed of the vane chambers (230) of the active and passive pumps are automatically adjusted to an inversely proportional operation balance, achieving the purpose of smooth variable speed driving.
More Like This:
| JPS62168982 | DISPLACEMENT TYPE COMPRESSOR |
| JPS58192989 | VARIABLE CAPACITY TYPE VANE PUMP |
Inventors:
CHANG JUI-CHENG (CN)
Application Number:
PCT/CN2020/080389
Publication Date:
September 23, 2021
Filing Date:
March 20, 2020
Export Citation:
Assignee:
CHANG JUI CHENG (CN)
International Classes:
F04C2/344; F04C14/18
Domestic Patent References:
| WO2017103852A1 | 2017-06-22 |
Foreign References:
| CN104295489A | 2015-01-21 | |||
| CN107218212A | 2017-09-29 | |||
| CN110439806A | 2019-11-12 | |||
| CN107806408A | 2018-03-16 | |||
| CN206817135U | 2017-12-29 | |||
| CN206175208U | 2017-05-17 | |||
| CN110131160A | 2019-08-16 |
Other References:
See also references of EP 4123176A4
Attorney, Agent or Firm:
BEIJING SANYOU INTELLECTUAL PROPERTY AGENCY LTD. (CN)
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