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
SAKAKIBARA NORIAKI
Application Number:
JP2022124265A
Publication Date:
July 28, 2023
Filing Date:
August 03, 2022
Export Citation:
Assignee:
HEISHIN ENG & EQUIPMENT CO LTD
International Classes:
F04C2/107
Domestic Patent References:
| JP2016079971A | 2016-05-16 | |||
| JPH07501374A | 1995-02-09 | |||
| JP2015135100A | 2015-07-27 | |||
| JP2016142188A | 2016-08-08 | |||
| JPS57176378A | 1982-10-29 | |||
| JPS6220684A | 1987-01-29 | |||
| JP2010001876A | 2010-01-07 | |||
| JPH06500615A | 1994-01-20 |
Foreign References:
| CN211059004U | 2020-07-21 | |||
| WO2008075507A1 | 2008-06-26 |
Attorney, Agent or Firm:
Michiko Matsutani
Yoshiyuki Maebori
Yoshiyuki Maebori