Abstract
An effort is made to apply a scroll machine to development of a vacuum pump. In view of mechanical simplification and load patterns, the vacuum pump uses a rotating mechanism to produce paired vortices rotating around each center. Chip seal and atmospheric pressure are utilized for axial gap sealing while a spring and atmospheric pressure for the radial gap sealing. In both gaps, the sealing direction is stationary relative to the environment during rotation, making it much easier to achieve effective sealing as compared to oscillating pumps. Since the compression ratio is high in vacuum pumps, a zero top clearance form is adopted for the central portion of vortices and an gas release valve is installed in the rotating axis. A compact Oldham coupling with a small inertia force is installed behind the vortices to maintain the required phase relations between the vortices. These improvements result in a vacuum of 1 Pa for dry operation and 10/sup -2/ Pa for oil flooded operation of a single-stage scroll machine at 1800 rpm. (5 figs, 1 tab, 4 refs)
Citation Formats
Morishita, Etsuo, Suganami, Takuya, Nishida, Mitsuhiro, Kitora, Yoshihisa, Yamamoto, Sakuei, and Fujii, Kosaburo.
Scroll vacuum pump.
Japan: N. p.,
1988.
Web.
Morishita, Etsuo, Suganami, Takuya, Nishida, Mitsuhiro, Kitora, Yoshihisa, Yamamoto, Sakuei, & Fujii, Kosaburo.
Scroll vacuum pump.
Japan.
Morishita, Etsuo, Suganami, Takuya, Nishida, Mitsuhiro, Kitora, Yoshihisa, Yamamoto, Sakuei, and Fujii, Kosaburo.
1988.
"Scroll vacuum pump."
Japan.
@misc{etde_7199494,
title = {Scroll vacuum pump}
author = {Morishita, Etsuo, Suganami, Takuya, Nishida, Mitsuhiro, Kitora, Yoshihisa, Yamamoto, Sakuei, and Fujii, Kosaburo}
abstractNote = {An effort is made to apply a scroll machine to development of a vacuum pump. In view of mechanical simplification and load patterns, the vacuum pump uses a rotating mechanism to produce paired vortices rotating around each center. Chip seal and atmospheric pressure are utilized for axial gap sealing while a spring and atmospheric pressure for the radial gap sealing. In both gaps, the sealing direction is stationary relative to the environment during rotation, making it much easier to achieve effective sealing as compared to oscillating pumps. Since the compression ratio is high in vacuum pumps, a zero top clearance form is adopted for the central portion of vortices and an gas release valve is installed in the rotating axis. A compact Oldham coupling with a small inertia force is installed behind the vortices to maintain the required phase relations between the vortices. These improvements result in a vacuum of 1 Pa for dry operation and 10/sup -2/ Pa for oil flooded operation of a single-stage scroll machine at 1800 rpm. (5 figs, 1 tab, 4 refs)}
journal = []
volume = {54:498}
journal type = {AC}
place = {Japan}
year = {1988}
month = {Feb}
}
title = {Scroll vacuum pump}
author = {Morishita, Etsuo, Suganami, Takuya, Nishida, Mitsuhiro, Kitora, Yoshihisa, Yamamoto, Sakuei, and Fujii, Kosaburo}
abstractNote = {An effort is made to apply a scroll machine to development of a vacuum pump. In view of mechanical simplification and load patterns, the vacuum pump uses a rotating mechanism to produce paired vortices rotating around each center. Chip seal and atmospheric pressure are utilized for axial gap sealing while a spring and atmospheric pressure for the radial gap sealing. In both gaps, the sealing direction is stationary relative to the environment during rotation, making it much easier to achieve effective sealing as compared to oscillating pumps. Since the compression ratio is high in vacuum pumps, a zero top clearance form is adopted for the central portion of vortices and an gas release valve is installed in the rotating axis. A compact Oldham coupling with a small inertia force is installed behind the vortices to maintain the required phase relations between the vortices. These improvements result in a vacuum of 1 Pa for dry operation and 10/sup -2/ Pa for oil flooded operation of a single-stage scroll machine at 1800 rpm. (5 figs, 1 tab, 4 refs)}
journal = []
volume = {54:498}
journal type = {AC}
place = {Japan}
year = {1988}
month = {Feb}
}