公开(公告)号：US20190078566A1

公开(公告)日：2019-03-14

申请号：US16123040

申请日：2018-09-06

Applicant: DENSO CORPORATION

Inventor： Masashi INOUE ,  Yasuhiro TAKEUCHI ,  Yuuji HIDAKA ,  Masatoshi TAKAGI

IPC: F04C2/16 ,  F04C13/00

Abstract: A screw pump has a male screw accommodation hole and a female screw accommodation hole formed in a pump housing. A male screw member and a female screw member are respectively accommodated in the male screw accommodation hole and the female screw accommodation hole. A male-side clearance is formed in a radial direction between the male screw member and the male screw accommodation hole and a female-side clearance is formed in the radial direction between the female screw member and the female screw accommodation hole. The female-side clearance is made to be larger than the male-side clearance, so that the female screw member can easily move in a direction away from the male screw member to the female-side clearance when any extraneous material is going to be wedged between the male screw member and the female screw member, to thereby prevent a locked condition of the screw members.

公开(公告)号：US20190017504A1

公开(公告)日：2019-01-17

申请号：US16069607

申请日：2017-01-13

Applicant: DENSO CORPORATION ,  SOKEN, INC.

Inventor： Masashi INOUE ,  Yasuhiro TAKEUCHI ,  Haruo KAMIYA ,  Yusuke HONGO ,  Masahiro OKAJIMA

IPC: F04C15/00 ,  F02M37/08 ,  F04C2/16

Abstract: A screw pump includes a male screw, a female screw, a motor, a journal, a bearing member, and a case. The motor includes an output shaft, which transmits a torque to the male screw, and the motor is operable to drive the male screw to rotate the same through the output shaft. The journal is rotatably placed between the output shaft of the motor and the male screw. The bearing member rotatably supports the journal. The case includes a screw receiving hole that receives the male screw and the female screw. The journal and the male screw are coaxially and non-detachably integrated together. The output shaft and the journal are fitted together by clearance fit that enables transmission of the torque between the output shaft and the journal.

公开(公告)号：US20180216614A1

公开(公告)日：2018-08-02

申请号：US15749812

申请日：2016-06-29

Applicant: DENSO CORPORATION

Inventor： Yusuke HONGO ,  Masahiro OKAJIMA ,  Masashi INOUE ,  Yasuhiro TAKEUCHI ,  Haruo KAMIYA

IPC: F04C2/16 ,  F16C17/10 ,  F16C17/20

CPC classification number: F04C2/16 ,  F04C11/008 ,  F04C13/008 ,  F04C15/0042 ,  F04C2210/203 ,  F04C2240/50 ,  F16C17/10 ,  F16C17/20

Abstract: A screw pump pumps a fluid from an inlet port to a discharge port by rotating one drive screw and at least one driven screw which mesh with each other and includes the drive screw being rotatable about a drive rotation shaft, the driven screw to be driven by the drive screw and being rotatable about a driven rotation shaft, a drive journal provided coaxially with the drive screw and to rotate integrally with the drive screw, a driven journal provided coaxially with the driven screw and to rotate integrally with the driven screw while making contact with the drive journal along a contact line between the drive rotation shaft and the driven rotation shaft, a case including a cylinder that receives the drive screw and the driven screw, and a bearing member to rotatably support the drive journal and the driven journal.