Kawasaki Jukogyo Kabushiki Kaisha

Kabushiki Kaisha Kawasaki Precision Machinery

Nissan Motor Company Limited

Other

Kawasaki Jukogyo Kaisha Kabusiha

Mitsubishi Cable Industries, Ltd.

Kaoru Nomichi

Makoto Ninomiya

Yutaka Suzuki

Seiji Ishii

Yuko Funakubo

Hiroshi Ito

Mikiya Shinohara

Shinya Watanabe

Akinobu Moriyama

Teppei Sakaguchi

Yoshiki Sakaguchi

Shaun C Hogan

Masato Odashima

Yasushi Sotani

Hironori Sasaki

Tadahiko Kuroda

Takehiko Saeki

Masaki Kawahigashi

Yasuji Kanou

Hiroshi Aoshiba

Takeo Kozuki

Shoji Murakami

A sliding seal seals an annular gap between a first member and a second member to separate a high-pressure side and a low-pressure side from each other, the first member being movable relative to the second member. The sliding seal is provided at an annular attaching groove provided at the second member. The sliding seal includes: a pressure fluid seal configured to slidingly contact a sliding surface of the first member; and a lubricant holding piece provided at the high-pressure side of the pressure fluid seal, a lubricant storage space being formed between the lubricant holding piece and the pressure fluid seal.

Sliding seal and seal structure

A hydrogen gas supply device supplies hydrogen gas to a fuel cell stack and includes an electromagnetic pressure regulating valve that regulates the pressure of the hydrogen gas to low pressure. The electromagnetic pressure regulating valve includes a housing, and a valve passage connecting a primary port and a secondary port is formed in the housing. A valve body controls an opening degree of the valve passage and is provided in the housing. A high-pressure sealing member and low-pressure sealing member are provided on an outer periphery of the valve body. The high-pressure sealing member and the low-pressure sealing member are provided in this order from one end side of the valve body to the other end side thereof. The electromagnetic pressure regulating valve further includes a housing pressure equalizing passage connecting the secondary port and a buffer chamber formed between the high-pressure sealing member and the low-pressure sealing member.

Hydrogen gas supply device of fuel cell system

A fusible plug type pressure relief valve includes a housing, a valve element, a spring member, and a fusible piece. A valve passage is formed in the housing. A valve element is arranged at a closed position in the housing, the closed position being a position at which the valve element closes the valve passage. The valve element is movable to an open position at which the valve element opens the valve passage. The spring member presses the valve element in an open direction. The fusible piece supports the valve element against pressing force of the spring member. The fusible piece melts at not less than a predetermined melting temperature. An inner surface of a concave portion of the fusible piece contacts the valve element. The concave portion includes a tapered portion inclined relative to an axis line of the valve element.

Fusible plug type pressure relief valve

The present invention includes: a valve main body including a filling port through which a fuel gas is filled in a tank and an output port through which the fuel gas in the tank is output; and a jet flow deflection piece through which the fuel gas to be filled through the filling port is ejected at a predetermined angle relative to an axial direction of the tank. The jet flow deflection piece includes: a fuel ejecting portion including an ejection port through which the fuel gas is ejected into the tank; and a temperature measuring portion in which a temperature sensor configured to measure a temperature of the fuel gas to be filled in the tank is provided. Thus, the temperature of the fuel gas when filling the fuel tank with the fuel gas can be precisely measure and monitored.

Fuel tank valve

A valve device of the present invention includes: a main valve body interposed between a first pressure chamber of a main passage and a second pressure chamber; and a pilot valve body provided in the second pressure chamber. A first pilot passage including a first restrictor extends from an outside of a housing or a primary passage to the second pressure chamber, and a second pilot passage including a second restrictor is formed at the main valve body. The pilot valve body is maintained at a first operation position by a pilot valve body biasing member and is caused to move to a second operation position by a valve body driving unit. When the pilot valve body is located at the second operation position, the main valve body is caused to move to an open position by a pressure difference between the first pressure chamber and the second pressure chamber.

Valve device

The present invention provides a fuel gas supply system of a gas engine capable of supplying to a fuel gas supply unit a fuel gas of constant pressure which fluctuates little. In a fuel gas supply system, a high-pressure tank and a gas injector are connected to each other by a supply passage, and an electromagnetic pressure regulating valve is provided on the supply passage. The electromagnetic pressure regulating valve is configured to regulate the pressure of the gas, flowing through the supply passage, to pressure corresponding to a current supplied to the electromagnetic pressure regulating valve. The gas pressure downstream of the electromagnetic pressure regulating valve is detected by a low-pressure-side pressure sensor. A controller is electrically connected to the electromagnetic pressure regulating valve. The controller controls the current supplied to the electromagnetic pressure regulating valve such that pressure detected by the low-pressure-side pressure sensor becomes predetermined target pressure.

Fuel gas supply system of gas engine

A fuel gas supplying and filling system for a fuel gas consuming unit, capable of using a supply passage in both filling and supplying operations and improving the airtightness and reliability of a fill passage. A high-pressure tank and a fuel gas consuming unit are connected to each other by a supply passage, and an electromagnetic pressure regulating valve is provided on the supply passage. An electromagnetic on-off valve is provided between the electromagnetic pressure regulating valve and the high-pressure tank. A fill passage is connected to a portion of the supply passage, the portion being located between the electromagnetic pressure regulating valve and the electromagnetic on-off valve. The fill passage is configured such that the high-pressure fuel gas can be supplied through a filling opening. When the high-pressure fuel gas is introduced to a downstream side of the electromagnetic on-off valve, the electromagnetic on-off valve opens the supply passage.

Fuel gas supplying and filling system

The present invention provides a pressure reducing valve having excellent responsiveness, durability, and reliability and stable output characteristics. A pressure reducing valve includes a housing, and the housing includes a valve passage connected to a primary port and a secondary port. A valve element is provided in the housing. The valve element can adjust an opening degree of the valve passage by moving between a closed position where the valve element closes the valve passage and an open position where the valve element opens the valve passage. The valve element is pressed toward the closed position by secondary pressure. A spring member is provided to bias the valve element toward the open position against the secondary pressure. Further, a rolling bearing is provided on the valve element, and the valve element is movably supported by the rolling bearing.

Pressure reducing valve

A valve device includes a valve body and a valve seat body. The valve seat body has a thick cylindrical shape extending in an axis line direction. The valve seat body includes a seal groove on an outer periphery thereof, the seal groove extending in a circumferential direction. The valve seat body includes a large-diameter portion and a small-diameter portion on an inner periphery thereof, the large-diameter and small-diameter portions connected to each other in the axis line direction. The valve seat body includes a valve seat portion between the large-diameter and small-diameter portions, the valve body being seated on the valve seat portion. The position of the seal groove in the axis line direction coincides with the position of the valve seat portion in the axis line direction or is located on a high-pressure side of the position of the valve seat portion in the axis line direction.

Valve seat body and valve device

An electromagnetic pressure regulating valve includes a valve body and causes a valve body to move by an electromagnetic proportional solenoid to adjust an opening degree of a valve passage, thereby regulating secondary pressure to target pressure. A pressure return chamber is formed in the housing, and a diaphragm seal is provided at the valve body. The diaphragm seal receives the secondary pressure of the pressure return chamber to cause the valve body to move toward a closed position. A bearing member is provided between the valve body and the housing. In a gap between the valve body and the housing, a high-pressure sealing member is provided closer to the valve passage than the bearing member, and a low-pressure sealing member is provided closer to the bearing member than the high-pressure sealing member. A buffer chamber connected to a secondary port is formed between the sealing members.

Gas pressure regulating valve

A seat block capable of maintaining a well-fitted state of a seat portion in a simple and reliable manner regardless of use conditions. A seat portion base body () is provided in a housing () provided with a valve passage () and allows a piston () for opening and closing a valve passage () to be pressed on the seat portion base body (). A spring member () applies an elastic force to the seat portion base body () such that the elastic mechanism () cooperates with the housing () to retain the seat portion base body ().

Seat block and valve device

A resin sub-seal member () provided with a concave groove () is disposed at a region closer to a higher-pressure side region than a rubber main seal member () and pressure variation in a gas on a higher-pressure side is inhibited from being transmitted to the main seal member (). Further, a variation reducing space () is formed between the seal members () and () to be able to reduce the pressure variation when gas leakage in the sub-seal member () occurs or the sub-seal member () responds with a delay with respect to the pressure variation. Thus, rapid change in the pressure of the gas surrounding the main seal member () is inhibited, occurrence of the blistering phenomenon is inhibited, and a high seal ability is achieved. The seal structure is formed by a simple structure including the seal members () and (), and the variation reducing space ().

Gas seal structure

A valve device includes a temperature sensor disposed to project from a housing to a tank inner space to detect the temperature in the tank inner space, and can detect the temperature without being influenced by the heat capacity of the housing. A coil generates a magnetic force to drive a valve with three terminals arranged at different positions in an axial direction, and a drive voltage is selectively applied between two of the terminals. A current value of the driving current which energizes the coil can be changed by selecting the terminals between which the drive voltage is applied. Without controlling the drive voltage, it is possible to suppress wasting power such that the driving current of the large current value is generated in the start-up time, and the current value of the driving current is decreased in the holding time.

Electric power is supplied to a coil () to drive a valve () for displacement by a magnetic action, thereby adjusting the opening of a valve path (). The electric power for thus driving the valve () is supplied to the coil () through an electric conductor wire (). The electric conductor wire () extends from a portion of a housing () that is exposed from a tank () to a portion of the housing () that accommodates the coil () therein. Thus, the housing () holds the electric conductor wire () as extending inside the housing (). Since the electric conductor wire () is thus held as extending inside the housing (), the electric conductor wire () is protected against vibration and impact given thereto from the outside. Thus, the electric conductor wire () has enhanced reliability in terms of resistance to vibration and impact. With the electric conductor wire () thus positioned within the housing (), the housing () can house the electric conductor wire () neatly. Thus, the present invention can provide a highly reliable electromagnetic valve device which can be reduced in size and simplified in structure.

Solenoid valve device

Under emergency, a valve body displaced from a closed position to an open position in association with melting of a fuse member receives resultant of pressing forces of a primary pressure of gas guided through a primary port in an opening direction in a state where the valve body is disposed at the position closer to the open position including a fluid driving start position between the closed position and the open position. The valve body receives smaller resultant of the pressing forces of the primary pressure in the opening direction in a state where the valve body is disposed at the position closer to the closed position than to the fluid driving start position than the resultant of the pressing forces received by the valve body in the state where the valve body is disposed at the position closer to the open position including the fluid driving start position.

Growing community of inventors

Ono, Japan

Kaoru Nomichi