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Title:
UNIAXIAL ECCENTRIC SCREW PUMP
Document Type and Number:
Japanese Patent JP2023104856
Kind Code:
A
Abstract:
To achieve both obtainment of sealing performance, and suppression of driving force required for rotation of a rotor.SOLUTION: A uniaxial eccentric screw pump comprises a stator 2 having an insertion hole 10 whose inner peripheral surface 10a is formed into a female screw shape, and a male screw type rotor 4 inserted into the insertion hole 10. In a cross section, the insertion hole 10 is formed as an elongated hole. As the rotor 4 rotates eccentrically, a cross sectional center O4 of the rotor 4 reciprocates in a longitudinal direction X along a center line CX extending in the longitudinal direction X of the insertion hole 10 between a pair of turn-back positions P1, P2. The rotor 4 is brought into close contact with the inner peripheral surface 10a of the insertion hole 10 in a lateral direction Y of the insertion hole 10. A first interference δ1 of the stator 2 with respect to the rotor 4 when the cross sectional center O4 is located at the turn-back positions P1, P2 is larger than a second interference δ2 of the stator 2 with respect to the rotor 4 when the cross sectional center O4 is positioned on a central axis A1.SELECTED DRAWING: Figure 3

Inventors:
KAMITSUJI HIDEFUMI
SAKAKIBARA NORIAKI
Application Number:
JP2022124265A
Publication Date:
July 28, 2023
Filing Date:
August 03, 2022
Export Citation:
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Assignee:
HEISHIN ENG & EQUIPMENT CO LTD
International Classes:
F04C2/107
Domestic Patent References:
JP2016079971A2016-05-16
JPH07501374A1995-02-09
JP2015135100A2015-07-27
JP2016142188A2016-08-08
JPS57176378A1982-10-29
JPS6220684A1987-01-29
JP2010001876A2010-01-07
JPH06500615A1994-01-20
Foreign References:
CN211059004U2020-07-21
WO2008075507A12008-06-26
Attorney, Agent or Firm:
Michiko Matsutani
Yoshiyuki Maebori