Kabushiki Kaisha Toyoda Jidoshokki Seisakusho

Kabushiki Kaisha Toyota Jidoshokki

Other

Denso Corporation

Toshiro Fujii

Kazuo Murakami

Naoya Yokomachi

Yoshiyuki Nakane

Kazuaki Iwama

Tatsuya Koide

Koichi Ito

Takayuki Imai

Takashi Ban

Takanori Okabe

Hitoshi Inukai

Kazuho Yamada

Katsuya Ohyama

Hayato Ikeda

Takayuki Hirano

Yuichi Kato

Hiromi Kitayama

Kazuya Kimura

Masakazu Murase

Tatsuyuki Hoshino

Masato Sowa

Ken Suitou

Takahiro Moroi

Satoshi Umemura

Kiyoshi Yagi

Shinichi Suzuki

Hideo Mori

Junya Suzuki

Akira Nakamoto

Atsushi Hosokawa

Ryuta Kawaguchi

Tsutomu Nasuda

Susumu Tarao

Takeshi Baba

Shoji Takemoto

Hironao Yokoi

Tomoya Inagaki

Hiromi Obata

Masahiro Kawaguchi

Masaki Ota

Shinya Yamamoto

Hiroaki Kayukawa

Taku Adaniya

Shigeru Suzuki

Shin Nishida

Katsunori Kawai

Ryo Umeyama

Takeshi Yamada

Fumihiro Suzuki

Katsutoshi Shiromaru

Hirohisa Katoh

Masanao Kagami

Katsumi Yamashita

Masanori Sonobe

Ryo Matsubara

Yasuharu Odachi

Hidehito Kubo

Nobuaki Hoshino

Motohiro Yamaguchi

Tomohiko Yokono

Shigeki Kanzaki

Izuru Shimizu

Yuji Hashimoto

Satoru Egawa

Hiroaki Kato

Takahito Kunieda

Tetsuya Takashima

Kenichi Morita

Manabu Ishikawa

Masaki Nomura

Shinya Saito

Kazuo Awamura

Ryo Katoh

A centrifugal compressor includes a rotation shaft, an impeller, a housing including a first chamber, a second chamber of which pressure is lower than the first chamber, and a partition wall that partitions the first chamber and the second chamber and includes a through hole through which the rotation shaft is inserted, and a seal member arranged in the housing. The seal member includes a gas seal and a support. When the rotation shaft is rotating, the gas seal surrounds an outer circumferential surface of the rotation shaft in a non-contact state in which dynamic pressure forms a gap between the gas seal and the outer circumferential surface of the rotation shaft. The support supports the gas seal in a state in which the gas seal is movable in a direction intersecting an axial direction of the rotation shaft.

Centrifugal compressor

In a compressor of the present invention, an intermediate pressure port through which a first discharge chamber and a motor chamber communicate with each other is formed in a front housing. A refrigerant having an intermediate pressure is discharged to the first discharge chamber. Consequently, it is possible to guide the refrigerant having the intermediate pressure in the first discharge chamber to the motor chamber, and cool an electric motor, which generates heat during actuation, with the refrigerant having the intermediate pressure. In the compressor, a first impeller and a second impeller are disposed such that large diameter portions of the first impeller and the second impeller face each other. The second impeller is smaller in diameter than the first impeller.

Motor-driven turbo compressor

A roots type fluid machine includes suction and discharge ports, rotary shafts and a pair of rotors. The rotor has a number n of lobe and valley portions with apex and bottom ends. The lobe portions are located on imaginary lines extending radially from an axis of the rotary shaft. The outer surface of each one of the rotors is generated by rotating an outline of the rotor including an arc and involute and envelope curves around and moving the outline in the direction of the axis. The arc has a radius R and a center located on the imaginary line. The involute curve is formed by an imaginary base circle having a radius r and a center located on the axis. The envelope curve is formed by an arc having a radius R. The number n is four or more. A torsional angle &#x3b2; is over 360/n degrees.

Roots type fluid machine

An electric pump for supplying a hydrogen gas to a fuel cell includes a rotary shaft rotatably inserted through an electric motor, a transmitting member provided on one of an outer peripheral surface of the rotary shaft and an inner peripheral surface of the electric motor so as to be rotatable therewith, and a groove formed in the other of the outer peripheral surface of the rotary shaft and the inner peripheral surface of the electric motor for the transmitting member to be inserted therein. The groove transmits a rotary torque of the electric motor to the rotary shaft by contacting an inner surface of the groove and the transmitting member and has an opening width along a rotary direction of the rotary shaft which is larger than the width of the transmitting member. The groove and the transmitting member produce an impact torque when the electric pump is started.

Electric pump for hydrogen circulation

The variable displacement gear pump for a loading system in an industrial vehicle has main and sub gear pump portions, suction, discharge and bypass passages, and check and opening valves. The main gear pump portion has main drive and driven gears, and has suction and discharge side spaces. The sub gear pump portion has sub drive and driven gears, and has suction and discharge side spaces. The bypass passage returns hydraulic fluid in the discharge-side space of the sub gear pump portion to the suction passage. The check valve prevents hydraulic fluid in the discharge-side space of the main gear pump portion from flowing to that of the sub gear pump portion. The opening valve is used for opening and closing the bypass passage, and closes the bypass passage due to a pressure in a discharge conduit of the loading system increased by the load applied to the loading system.

Variable displacement gear pump

A variable displacement rotary pump includes a main pump unit, an auxiliary pump unit, a discharge passage, a bypass passage, a suction passage, a check valve and a control valve. The suction passage is in communication with the discharge passage through the bypass passage and a second discharge port. The check valve is disposed in the discharge passage for preventing fluid in a first discharge port of the main pump unit from flowing into the bypass passage. The control valve is operable for opening and closing the bypass passage. When the control valve opens the bypass passage and the check valve closes the discharge passage, flow rate of the fluid discharged from the discharge passage is reduced. A throttle passage is provided in the bypass passage or the control valve for regulating flow of the fluid in early phase of operation of the control valve to open the bypass passage.

Variable displacement rotary pump

A centrifugal compressor for compressing gas has a casing, a rotary shaft, an impeller, a diffuser, a first scroll, a second scroll, a first passage, a second passage, and a switching member. The rotary shaft is supported by the casing. The impeller is rotatably fixed to the rotary shaft, and sends the gas radially outward to a flow path downstream thereof. The diffuser is formed around the impeller. The first scroll is formed around the diffuser. The second scroll is formed between the diffuser and the impeller. The first passage is formed from the impeller to the first scroll through the diffuser. The second passage is formed from the impeller to the second scroll. The switching member switches the flow path between the first passage and the second passage by opening and closing the diffuser.

Centrifugal compressor having switchable two passages

A hydraulic system that can implement effective practical use of energy is provided. A hydraulic system according to the present invention has a hydraulic pump driven by a hydraulic pump motor, a loading cylinder and a power steering cylinder which are driven by pressure oil supplied from the hydraulic pump, and power supply means for supplying power to the hydraulic pump motor. The power supply means comprises a stack of a fuel cell, a fuel supply passage for supplying hydrogen gas to the stack, fuel circulating passages in which a hydrogen pump for joining unreacted hydrogen gas discharged from the stack into the fuel supply passage to circulate hydrogen gas is disposed, and a regenerator which is driven by pressure oil to generate rotational force. The hydrogen pump is rotationally driven by the regenerator.

Hydraulic system

A rotary shaft is rotatable relative to a motor rotor. A first end face of the motor rotor is exposed to the outside of a stator. A hammer portion is provided at the first end face. The hammer portion is configured to be movable as the motor rotor rotates. A collision portion rotating integrally with the rotary shaft is configured to collide with the hammer portion. The allowance space between the collision portion and the hammer portion allows the hammer portion to be move relative to the collision portion. Therefore, the electric pump is capable of detaching a rotor from a pump chamber without increasing the size of the pump.

Electric pump

A roots type fluid machine includes a housing, a pair of parallel rotary shafts and two-lobe rotors. Each rotor includes two lobe portions and two well portions. Each lobe portion has a profile of convex arc with a radius R and each well portion has a profile of concave arc which is an envelope of the convex arc of the lobe portion. The rotor has a configuration defined by a curve which includes the convex arc, the concave arc and further an involute curve with a base radius r between the convex and concave arcs. The base radius r is set in a range L/(2&#x221a;{square root over ( )}2)&#x3c;r&#x3c;0.3(&#x221a;{square root over ( )}2)L where distance between axes of the rotary shafts is L, and the radius R is set in a range {(&#x221a;{square root over ( )}2)/16}&#x3c0;L&#x3c;R&#x3c;{(27&#x2212;5&#x221a;{square root over ( )}2)/56}L.

A roots compressor has a housing, a rotary shaft, a rotor and a layer. The housing defines a pump chamber, a suction port and a discharge port. The suction port and the discharge port adjoin to the pump chamber. The rotary shaft is rotatably supported by the housing. The rotor is connected to the rotary shaft and contained in the pump chamber. Fluid introduced into the pump chamber through the suction port is discharged to the outside of the pump chamber through the discharge port by rotation of the rotor which is driven through the rotary shaft. The layer is formed on an inner peripheral surface of the housing, which defines the pump chamber. The layer is thinner from a side adjacent to the suction port toward a side adjacent to the discharge port in circumferential direction of the housing.

Roots compressor

A compressor has a compression unit for compressing gas to a desired pressure, a drive shaft and a balancer. The drive shaft is connected to the compression unit for driving the compression unit. Imbalance on the drive shaft is generated due to movement of the compression unit. The balancer is mounted on the drive shaft and includes a main portion and adjustable portion for correcting the imbalance on the drive shaft. Preferably, at least one of the weight and the shape of the adjustable portion is adjustable.

Method of correcting imbalance of a scroll compressor

A starting system for a pump includes a driving motor, an electric source, a selector switch, a starter sensor, a temperature sensor and a control unit. The selector switch is located between the driving motor and the electric source for reversing polarity of the electric power supplied from the electric source to the driving motor. The starter sensor senses whether or not the driving motor has been started. The temperature sensor senses a temperature. The control unit operates the selector switch so as to repeatedly give the driving motor indications of reverse rotation and normal rotation in a case where the starter sensor does not sense that the driving motor has been started even if the control unit operates the selector switch so as to give the driving motor the indication of normal rotation in a state where the temperature sensed by the temperature sensor is below a preset temperature.

System and method for starting pump

Compressor having main and adjustable balancer portions

A scroll type compressor has a housing, a fixed metal scroll member and a movable metal scroll member. The fixed and the movable scroll members each have a base plate and scroll wall extending therefrom. The fixed scroll member is fixed to the housing. The movable scroll member engages the fixed scroll member to trace an orbital motion when driven by a crank mechanism. The scroll members define compression chambers. Resin tip seals are respectively provided on distal ends of the scroll walls and slidably engage the metallic surfaces of the facing base plates. The tip seals seal the compression chambers. A resin coating layer is formed on a region of at least one of the end surfaces of the base plates that is not contacted by a tip seal.

Scroll type compressor having tip seals and a scroll coating layer

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Kariya, Japan

Toshiro Fujii