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 totally closed hydraulic oil tank applied in a hydraulic circulatory system and taking hydraulic oil as circulatory hydraulic oil for use in a matching manner. The totally closed hydraulic oil tank includes an oil storage tank, an oil-gas separation device, an air filter, a return oil filter, a fuel charger, an oil level indicator, an oil outlet pipe and a flow guide device, wherein the volume of the oil-gas separation device is compacted and expanded to provide the space required for oil storage or oil supply of the hydraulic system, so that the hydraulic oil and air are in respective containers, pollution sources brought when air is breathed can be eliminated, the entire hydraulic system operates in a totally closed state, the hydraulic oil is controlled and prevented from pollution radically, the reliability and service lives of components can be effectively improved and prolonged, and further, the maintenance-free hydraulic system can be realized. The totally closed hydraulic oil tank is particularly suitable for dump trucks and loading trucks, and can be matched for use on various hydraulic systems under harsh environment.

The invention relates to a fuel injector (10) for injecting fuel into a combustion chamber of an internal combustion engine. An injection valve element (42) is actuated via pressure relief of a control space (36). Said control space (36) is loaded by a system pressure Rhosys. The control space (36) is relieved of pressure via a solenoid valve (22) of pressure-equalized configuration, the valve element (62) of which opens or closes a valve seat (80). The valve seat (80) comprises a spherical surface (86).

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 provides a ventilation conditioning system and a control method thereof. The ventilation conditioning system comprises a ventilation system with a ventilation duct and an air conditioning system with an indoor air duct and an indoor heat exchanger; the ventilation conditioning system further comprises a ventilation heat exchange branch which is connected with the indoor heat exchanger in parallel, the ventilation heat exchange branch comprises an electronic expansion valve; the ventilation conditioning system further comprises an air duct communicating device arranged between theventilation duct and the indoor air duct, and the air duct communicating device is used for communicating the ventilation duct with the indoor air duct and / or communicating the ventilation duct withoutdoor inlet air. According to the ventilation conditioning system and the control method thereof, it can be guaranteed that the ventilation outlet temperature is close to the indoor air outlet temperature, so that the indoor air temperature difference is reduced, and the comfort level of a user is improved.

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 object of the invention is to realize the pressure balancing between the outdoor side of the air conditioner and the piping or between the high pressure side piping and the low pressure side piping to make the compressor work all right. In order to realize the aim, the air conditioner of the invention is characterized by including: a compressor for compressing the refrigerant, a pressure pipe for discharging the high pressure flowing refrigerant and an outdoor machine used in the low voltage tube to make the low voltage refrigerant sucked into the compressor flow; a first piping connecting the high pressure pipe and the indoor machine and a second piping connecting the low pressure pipe and the indoor machine; a bridge type apparatus disposed in the high pressure pipe for controlling the pressure equalizing between the first piping and the second piping; a control unit, for closing the bridge type apparatus when the compressor is operated and opening the bridge type apparatus when the compressor stops.

The invention provides a deep sea hydraulic station. The deep sea hydraulic station comprises a box body, a radial pump, a direct-current brushless motor, a stacked three-position four-way electromagnetic reversing valve, a stacked hydraulic control one-way valve, a stacked overflow valve, a hydraulic cylinder, an energy accumulator, a pressure sensor, a direct-acting overflow valve and an integrated block plug-in overflow valve. The radial pump, the direct-current brushless motor, the stacked three-position four-way electromagnetic reversing valve, the stacked hydraulic control one-way valve,the stacked overflow valve, the energy accumulator, the pressure sensor, the direct-acting overflow valve and the integrated block plug-in overflow valve are all located in the box body. The deep seahydraulic station has the advantages of being compact in structure, good in sealing performance, stable, safe and capable of adapting to the special deep sea environment.

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 relates to a valve upper part for sanitary fittings, comprising a head piece which accommodates a bottom part having two inlet channels and at least one first outlet channel, and a disc control with a control disc which is displaceable by means of a rotatably mounted spindle relative to a rotationally fixed transmission disc A connection channel (31) is introduced into the control disc (3), via which a first inlet channel (51) and the first outlet channel (52) can be connected in a rotational position of the control disc (3) relative to the transmission disc (4).

The invention discloses a flexible hot-pressing device for adhesion of a secondary screen wall of a Mark type cargo containment system. The flexible hot-pressing device comprises a hot-pressing devicebody and a combined device used for detecting and calibrating the temperature and pressure of the hot-pressing device body. The hot-pressing device body comprises the secondary screen wall adhering to an inner shell of a ship body, a flexible part used for extruding the screen wall and an extruding part used for extruding the flexible part. The secondary screen wall comprises a polyurethane insulating plate part adhering to the inner shell of the ship body, a glue layer arranged above the polyurethane insulating plate part and a flexible secondary screen wall layer arranged above the glue layer. According to the flexible hot-pressing device, a hot-pressing bag is designed to make direct contact with the flexible secondary screen wall layer, then the situation that the hot-pressing bag makes contact with the flexible secondary screen wall layer through a rigid plate is avoided, and thus extrusion contact between a pressing plate and the flexible secondary screen wall layer is replaced;and through the self-adaption mode of the hot-pressing bag, pressure balance of the flexible secondary screen wall layer is achieved.

Valve for a vibration damper having a valve housing and a valve slide movable in the valve housing to at least partially close at least one flow path of a fluid flowing through the valve. The valve has an input side and an output side. Pressure impingement surfaces of the valve slide are substantially equal for an opening pressure and for a closing pressure, and the valve slide has a restriction through which a pressure difference between opening pressure and closing pressure can be generated.

Control ring (10; 210) for controlling the flow of a pressure medium in a displacement pump (200), said control ring (10; 210) is; €¢ centred about a rotational axis (ax) €¢ extending along said rotational axis (ax), €¢ having an inner and an outer diameter (d, D) and thereby an inner and outer radial surface (11, 12; 211, 212) €¢ a first and a second axial surface (13, 14; 213, 214), wherein said first axial surface (13; 213) having an interface section (20; 220) provided with at least a first and a second opening (21, 22; 221, 222), which first and second opening (21, 22; 221, 222) are separated by a first and a second intermediate section (15, 16; 215, 216), characterised in, that said first and second opening (21, 22; 221, 222) are mouthing to a corresponding mouthing area provided at either of the inner and outer radial surface (11, 12; 211, 212).

The invention relates to a toy figure, particularly a functional doll, comprising a central torso (11) with a body shell (35) that surrounds a hollow space (34) inside the torso (11), and one or several extremities (12 to 16) such as a head (12) and / or arms (13, 13) and / or legs (15, 16) which are connected to the torso (11) in a preferably articulated manner. In order to prevent the toy figures from being unintentionally deformed, especially as a result of changes in the atmospheric pressure, at least one gas-permeable but liquid-impermeable, above all waterproof, membrane (47) is disposed inside or on the torso (11) of the toy figure in such a way that pressure compensation between the hollow space (34) inside the torso (11) and the exterior space (58) that surrounds the toy figure is ensured.

The invention relates to the technical field of chemical production technologies, in particular to an automatic powder exhausting and filtering mechanism which comprises a powder storage tank, a powder metering tank and an exhausting filter. A discharging outlet of the powder storage tank is connected with a feeding inlet of the powder metering tank through a material supplementing pipe. A supplemented material discharging valve is arranged on the material supplementing pipe. An air outlet of the powder metering tank is connected with an air inlet of the powder storage tank through an exhausting return pipe. The exhausting filter is connected with an air outlet of the powder storage tank. And the exhausting filter is provided with an exhaust valve and a reverse blowing valve. The technical problems that in the operation process in the prior art, powder is prone to blockage, exhaust is prone to pollution, the material supplementing speed is difficult to control, and the conveying and metering precision is affected are effectively solved.

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 relates to a filter rod transmission device which is used for transmitting filter rods in the tobacco industry to a conveying pipeline from a hopper. In the conveying direction of the filter rods, the filter rod transmission device includes a hopper which is used for receiving and storing the filter rods, wherein an atmospheric pressur pAtmos exists in the hopper; a pressure capsule which is used for receiving and temporarily storing the filter rods and has a channel for establishing and releasing pressure level; and a pressure chammer, in which a pressure Pdk>pAtmos exists, and is provided with a conveying unit, wherein the conveying unit includes a roller that can be rotationally driven and an expansion tank. The pressure capsule is sealed by sealing members having sealing components capable of being pneumatized on both the input side relative to the hopper and the output side relative to the pressure chamber. In order to change the pressure in the sealing components, the sealing components capable of being pneumatized are linked to a compact air control unit. The invention further relates to a corresponding method.

The invention relates to a proportional valve (1) for controlling a gaseous medium, in particular hydrogen, comprising a valve housing (2), on which a nozzle body (20) is formed. A closing element (18) is arranged in the valve housing (2), wherein the closing element (18) releases or blocks at least one passage opening (27) formed on the nozzle body (20) on a valve seat (30) formed on the nozzle body (20). Moreover, the closing element (18) is movably guided in a reciprocating manner in an axial guide (16) in the nozzle body (20).

An electro-hydraulic hybrid type planar three-range-of-motion controllable loading mechanism comprises a movable arm lifting mechanism, a bucket control mechanism and the like. The movable arm lifting mechanism is driven by an electric transmission system. The energy consumption is effectively reduced compared with an existing hydraulic loading machine. Through the introduction of hydraulic elements, the problem that stress of two lifting branched chains of a movable arm is unbalanced is effectively solved, and the bearing stability is improved. Since the load of the bucket control mechanism is small, a mature hydraulic cylinder is adopted to control a bucket to turn over, and the structure compactness of an actuation mechanism is guaranteed. The loading mechanism has the characteristics of being low in energy consumption and high in intelligence level, and compared with an existing controllable loading mechanism, the vibration resistance is higher, overload protection is achieved easily, and the practicability is higher.

The invention relates to a delivery pump (10) for cryogenic fuels (1), comprising a pump casing (11) inside which a pump piston (25) is arranged in such a way as to be able to reciprocate within a pump chamber (30); the pump piston (25) is connected to a drive (40) for the pump piston (25) by means of a piston rod (26) which is radially guided within a longitudinal bore (20) in the pump casing (11) and which is sealed from the longitudinal bore (20) by at least one sealing device (60), the at least one sealing device (60) being designed to at least reduce leakage of fuel (1) from the pump casing (11).

The invention discloses a sample crystal particle generating system and method. The sample crystal particle generating system comprises a syringe needle fixing frame, an air pressure pipeline connected with the syringe needle fixing frame, an air pressure syringe needle, a sample crystal particle generator and a heat conducting container for containing the lower portion of the sample crystal particle generator. A first sealing cover and a sealing sleeve are arranged at the upper end and the lower end of the heat conducting container correspondingly; an air exhaust opening is formed in the first sealing cover, and a one-way valve is arranged at the air exhaust opening; the air pressure syringe needle is connected with the sample crystal particle generator; crystal particle carrier oil is arranged in the heat conducting container; the lower portion of the sample crystal particle generator is located in the heat conducting container; the oil surface height of the crystal particle carrieroil is larger than the height of positions where all micro flow channels of the sample crystal particle generator are located; and a constant-current and constant-pressure pump is arranged on the airpressure pipeline. The sample crystal particle generating system has the characteristics of excellent stability and reproducibility, ultra-high sensitivity, extreme precision and low cost.

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.

The invention discloses a multifunctional high-efficiency heat dissipation device applied to a computer, and relates to the technical field of computers; the device comprises a box body and power elements; the power elements are fixedly mounted on the inner side wall of the box body; a through hole is formed in the side wall of the box body; a cleaning plate is fixedly mounted in the through hole;a linkage mechanism is rotationally mounted on the side wall of the through hole; an air draft mechanism is mounted on the inner side wall of the box body; a dust suction box is fixedly mounted on the outer side wall of the box body; a sliding pipe is fixedly mounted in the dust suction box; the end part of the box body is fixedly connected with a heating head; an adjusting mechanism is mounted in the heating head; a ventilation groove is formed in the side wall of the box body in a penetrating mode, a filter plate is installed in the ventilation groove, a sliding groove communicating with the ventilation groove is formed in the inner top of the ventilation groove; the negative pressure effect is achieved through an air draft mechanism, and the dustproof plate is cleaned while heat dissipation of power elements in the box body is achieved.

The invention provides an electromagnetic valve device capable of eliminating the negative pressure in the valve, and belongs to the technical field of electromagnetic valves. The problem that in theprior art, the negative pressure is easily generated in a valve body of an electromagnetic valve in the working process and the normal work is influenced is solved. The electromagnetic valve device comprises an electromagnetic valve body and a water knockout trap fixedly arranged at the bottom of the electromagnetic valve body and in sealed connection with the electromagnetic valve body. The electromagnetic valve body comprises an electromagnetic assembly and a valve body assembly. The valve body assembly comprises a valve rod sleeve matched and connected with a static iron core, a spring movably arranged in the valve rod sleeve, and a valve rod with a movable sealing head. The end, making contact with the movable sealing head, of the valve rod sleeve is fixedly provided with a first pressure balancing device. The movable sealing head is fixedly provided with a second pressure balancing device. The electromagnetic valve device capable of eliminating the negative pressure in the valve has the advantages of being simple in structure, convenient to use and low in cost, the pressure balance in the electromagnetic valve body can be realized, and the control over the output water flow can be realized so that the water flow can be prevented from backward flowing.