78results about How to "Achieve pressure balance" patented technology

A mechanical seal having a single rotatable seal ring having a pair of concentric seal faces to form a radially inner seal face and a radially outer seal face. The mechanical seal also includes first and second stationary seal rings, each having a seal face, where the seal face of the first stationary seal ring contacts the radially outer seal face of the rotatable seal ring and the seal face of the second stationary seal ring contacts the radially inner seal face of the rotatable seal ring. The seal also includes a sleeve adapted to be mounted about the rotating shaft and rotatably coupled thereto and to the rotatable seal ring, said sleeve having a flange portion that is configured for housing at least a portion of the rotatable seal ring, and a gland for housing at least partially the single rotary seal ring and the first and second stationary seal rings. Under positive and negative pressure conditions, the combined area of the seal piston areas are substantially identical to provide a balanced seal arrangement without requiring the use of axially movable components.

The invention relates to a proportional throttle valve comprising a valve piston (2) which is displaceably guided in the longitudinal direction in a valve housing (3) having a fluid inlet (4) and a fluid outlet (5) and is pretensioned by an energy accumulator, in particular in the form of a pressure spring, against a stroke stop (6) defining the closure position. The invention is characterized in that a pressure limiting valve (7) is integrated in the proportional throttle valve (1), wherein said pressure limiting valve allows to influence the fluid pressure on the rear side (8) of the valve piston (2) in order to allow the piston to move away from the stroke stop (6) in opposition to the pretensioning force when a predefinable pressure is exceeded at the fluid inlet (4).

The invention relate to a drying device (10). In order to reduce a moisture content of a gas located in an inner chamber (34) of the housing (40), the drying device comprises a desiccant cartridge (18) having a desiccant (20). The drying device (10) comprises a protective chamber (32) which is or can be introduced into the housing (40). The protective chamber (32) is in a liquid-tight manner with respect to the inner chamber (34) and is connected to the internal space (34) in a gas-conducting manner. The desiccant cartridge (18) is arranged in the protective chamber. The invention further relates to a battery system (42) having the drying device (10) and relates to a motor vehicle having the battery system (42).

The invention discloses a valve seat structure of a pressure self-releasing ball valve, which comprises a body; one surface of the body is jointed with the valve ball to form a sealing surface, and the exterior angle part of the other surface thereof is provided with a ring-shaped gap which matches with a valve cover to form a ring channel which can hold an O-typed ring; the outer side wall of the valve seat is provided with at least two pressure releasing grooves which are distributed evenly along the peripheral direction; the inner wall of the ring-shaped gap which is adjacent to the outer side wall of the valve seat is accordingly provided with another pressure releasing groove which is communicated with the pressure releasing grooves. By opening the pressure releasing grooves in proper positions of the valve seat, the valve seat structure leads the media to enter the inner cavity of the valve body by the pressure releasing grooves although the valve gate is in a closed status, thereby realizing the pressure balance of the outer cavity and the inner cavity of the ball valve, overcoming the shortage that the valve gate is easy to release due to the valve seat and the valve ball deformation which is caused by the media pressure, and prolonging the service life.

The present invention relates to a structure having internal combustion engines (10a, 10b) which have two independent turbochargers (14a, 14b). The air filtered via clean air filters (16a, 16b) is input into the turbochargers (14a, 14b) respectively through clean air tubes (18a, 18b), wherein a pressure balance for the air entering into the two clean air tubes (18a, 18b) is formed. A fluid tube (24) can interconnect the two clean air tubes (18a, 18b). And an air collecting container (26) also can be arranged.

The invention provides a combined intelligent meter and valve integrated machine, and belongs to the technical field of heating system metering instruments. The combined intelligent meter and valve integrated machine comprises an outer shell, an ultrasonic heat meter and an intelligent flow regulating valve. The ultrasonic heat meter comprises a flow sensor, a water inlet temperature sensor, a water return temperature sensor, a heat meter main control panel, a direct-current motor ball valve and a direct-current motor. The flow sensor, the water inlet temperature sensor and the water return temperature sensor are all electrically connected with the heat meter main control panel. The direct-current motor is used for controlling opening and closing of the direct-current motor ball valve. The intelligent flow regulating valve comprises a straight pipe section valve body provided with a stepping motor ball valve, a stepping motor and a motor valve main control panel. The stepping motor is used for controlling the opening degree or opening and closing of the stepping motor ball valve. The motor valve main control panel is electrically connected with the direct-current motor and the stepping motor. The combined intelligent meter and valve integrated machine has the beneficial effects that the flow control effect is further achieved besides the heat metering effect, the indoor temperature can be regulated through flow control, pipelines can be closed in time when the pipelines fail, and remote control can be further achieved.

The invention provide a multi-heat-source heat pump type electric vehicle heat management system based on phase change heat storage. A phase change heat storage unit is additionally arranged in a power assembly heat dissipation pipeline, the number, form and time differences of energy in supply and demand are overcome, efficient heating and cooling of an electric vehicle can be achieved, the mode that an air source heat pump is combined with a water loop heat pump is adopted, the water loop heat pump mode is switched to operate under the extremely low-temperature working condition, and a series of problems caused by the air source heat pump can be avoided. Three electric vehicle heat management subsystems are organically integrated, the valve control operability is high, the component structures are compact, and the integration degree is high; in a passenger compartment heat management, a water-cooled condenser is adopted as a heat release device of a refrigerating circuit, and the problems that a condenser used at present is generally large in size and large in occupied space can be solved; and in addition, a phase change heat storage device can reduce the area of a radiator at the front end, so that the windward area can be reduced, the wind resistance is reduced, and the endurance mileage is increased.

The invention discloses a refrigerator. The refrigerator comprises a plurality of chambers, and further comprises a pipeline assembly, wherein the pipeline assembly comprises a main pipe and a plurality of branch pipes, and the branch pipes correspond to the chambers in a one-to-one mode, each branch pipe is connected with one chamber and the main pipe, the far port of the main pipe is sealed by liquid, and branch pipes communicated with each other so as to achieve the pressure balance of the chambers.

The invention concerns a bearing cover for separating the inner region of a bearing from the environment. The bearing cover according to the invention comprises: an annular edge section (1) which is at spacing from a bearing axis (X) and can be mounted in sealing manner on a connection region; a cover section (2) which extends in a region surrounded by the annular edge section and adjoins the latter; and a membrane element (3) which is designed as a gas-permeable membrane and enables pressure to be equalized between the bearing inner region and the environment. According to the invention, an opening section (4) is formed in the cover section at a location offset radially from the bearing axis and towards the annular edge, and the membrane element is disposed in this opening section which is radially offset from the bearing axis.

An electro-hydraulic hybrid planar three-activity controllable loading mechanism includes a boom lifting mechanism, a bucket control mechanism, and the like. The boom lifting mechanism is driven by an electric transmission system, which effectively reduces energy consumption compared with existing hydraulic loaders, and through the introduction of hydraulic components, the problem of unbalanced force on the two lifting and branch chains of the boom is effectively improved, and the load capacity is improved. Stability: due to the relatively small load of the bucket control mechanism, a relatively mature hydraulic cylinder is used to control the flipping of the bucket, which ensures the compact structure of the actuator. The loading mechanism not only has the characteristics of low energy consumption and high level of intelligence, but also has higher anti-vibration performance than the existing controllable loading mechanism, and is easy to realize overload protection, and has stronger practicability.

The invention relates to a kitchen appliance (10) which has a disk-shaped body (12), which is embodied as a stretched elastic film (14) in the central area (13) and which is reinforced on the edge (16). The kitchen appliance (10) can be used as a cover for fresh food containers, as a cover for microwave dishes and as a stand for saucepans and similar.

An inverted non-stop apparatus of a multi-cylinder diesel engine for a free-fall lifeboat is provided. The apparatus includes a lubricating system and a breathing system. The lubricating system includes a machine body (101), an engine oil pump, and an oil pan (118). The breathing system is a diesel engine breather. A partition board (1181) is transversely provided in the oil pan (118) to divide a cavity of the oil pan (118) into a left cavity and a right cavity. The left cavity is an oil collection groove (1182), and the right cavity is an oil tank body (127A). A flange is provided at an opening of the oil tank body (127A) for fixing an oil tank cover (125) to form an enclosed lubricating oil tank (127). The engine oil pump is a double pump having oil inlets and outlets independent separately, which is formed by superposing upper and lower layers, wherein the upper layer is a lubricating pump (111) and the lower layer is an oil return pump (112). An oil suction port (114) of the oil return pump (112) is connected to the bottom of the oil collection groove (1182), and an oil outlet is connected to the lubricating oil tank (127). An oil inlet of the lubricating pump is connected to the lubricating oil tank (127), and an oil outlet is communicated with a main oil path (102) of the machine body. A breathing one-way valve (132) and an air pressure relief valve (131) are provided on the oil tank cover (125). The inverted non-stop apparatus of a multi-cylinder diesel engine for a free-fall lifeboat separate an engine oil collection function and an engine oil storage function borne by an oil pan of a diesel engine, so that no matter the diesel engine is longitudinally and transversely turned over and inverted, the diesel engine can operate normally.