83results about How to "Reduce the pumping volume" patented technology

A Peristaltic micropump includes a first membrane region with a first piezo-actor for actuating the first membrane region, a second membrane region with a second piezo-actor for actuating a second membrane region, and a third membrane region with a third piezo-actor for actuating the third membrane region. A pump body forms, together with the first membrane region, a first valve whose passage opening is open in the non-actuated state of the first membrane region and whose passage opening may be closed by actuating the first membrane region. The pump body forms, together with the second membrane region, a pumping chamber whose volume may be decreased by actuating the second membrane region. The pump body forms, together with the third membrane region, a second valve whose passage opening is open in the non-actuated state of the third membrane region and whose passage opening may be closed by actuating the third membrane region. The first and the second valve are fluidically connected to the pumping chamber.

A micropump including one or more microchannels for receiving a fluid and a plurality of electrodes arranged on a diaphragm and energized in a manner to provide an enhanced electrohydrodynamic flow of fluid through the one or more microchannels. The micropump may be used for pumping a working fluid for removing heat from a heat-generating electronic component or for delivery of a drug, medicine, or other treatment agent as or in a fluid to a patient.

The invention discloses a turbine motor of gas turbine; the turbine motor comprises a casing, a turbine motor entrance, a turbine motor exit, a turbine rotor, four-level fixed blades, and four-level movable blades. The turbine rotor comprises four impeller disks and three intermediate disks; the four impeller disks and the three intermediate disks are alternately arranged along an axial direction, and are connected together via a group of pull rods. The fixed blades are mounted on the fixed casing, and an impingement cooling sleeve is arranged therein, film holes are arranged on the surface thereof, and a convection cooling channel is arranged on the trailing edge thereof. The movable blades are mounted on one side of the rotor and revolve together with the rotor, wherein three levels are hollow structures, a double-snakelike cooling channel and multiple groups of herringbone fins are arranged therein. The fixed blades and the movable blades are alternately arranged in the axial direction of the rotor, and form a gas combustion channel therein. When the gas turbine is running, the turbine motor is able to effectively change the thermal energy of the high-temperature gas into the mechanical energy for rotating the rotor, and ensure the safety of the mechanical movement by sufficient and reasonable cooling.

The invention relates to a pump of the type including a moving member mounted to move relative to a support, the moving member having a central duct in which substance to be dispensed penetrates via at least one opening, the support co-operating with the moving member to define, around said central duct, a pump chamber of variable volume, said pump also having a membrane with a central portion in the form of a sleeve that is open at its top end and closed at its bottom end, said central duct being inserted in said central portion, the membrane being organized to isolate the pump chamber from the opening(s) of said central duct while the volume of the pump chamber is increasing and substance is being sucked into it. At least one of the membrane and the central duct is shaped to prevent a leakproof annular zone forming between the membrane and the central duct which would prevent the substance contained in the pump chamber from flowing via said central duct while the volume of the pump chamber is decreasing.

The invention discloses a movable dust arrestment device used for a metal iron mixer, comprising a dedust pipe (1), a support (2), a fixed smoke cover (3) and a movable smoke cover (4). The movable dust arrestment device is characterized in that: the fixed smoke cover (3) and a guide way (5) are arranged on the support (2), and the movable smoke cover (4) can move along the guide way (5), and can be combined with the fixed smoke cover (3) to form a sealed dedust cover; a pig-iron ladle dumping device (6) is arranged on the support (2), and the dedust pipe (1) is arranged on one side of the fixed smoke cover (3). The movable dust arrestment device used for the metal iron mixer has the advantages of convenient usage, ensuring high dust arrestment rate and good dedust effect in the iron receiving process of metal mixer, being energy-saving, reducing running cost, improving the working environment of operating staffs and reducing the operating rate of cranes in workshop.

A mechanical driver comprising a wedge shaped member operatively coupled to a shape memory alloy such that the shape memory alloy is able to displace the wedge shaped member in an essentially linear direction. The wedge shaped member is in constant contact with a lever arranged so that it can rotate about a fixed pivot point. A piston is arranged such that it is constant contact with the lever at a point between the pivot point of the lever and the contact point between the lever and the wedge shaped member. Return springs are provided to return the piston, lever and wedge shaped member to their respective start positions. Activation of the shape memory alloy displaces the wedge shaped member along its linear direction and this causes the lever to be deflected about its pivot point and the piston to be deflected in an essentially linear direction that is perpendicular to the linear direction of travel of the wedge shaped member.

Various methods and system are described for a fuel system which includes a fuel composition sensor and a fuel lift pump disposed upstream of the sensor. The system may be operated in each of three different modes of operation. In each of the modes, a fuel lift pump voltage is adjusted responsive to a fuel capacitance output by the sensor, while a variable such as sensor temperature or fuel pump pressure is maintained depending on the mode of operation.

The invention relates to a vacuum package machine which comprises a welding wire disc feeding mechanism and a finished product delivery device and further comprises a film sealing device and a film supplying device. The film supplying device comprises an upper film supplying device and a lower film supplying device. The upper film supplying device is located on the upper portion of a machine frame and the lower film supplying device is located on the lower portion of the machine frame. The film sealing device comprises a front film sealing device and a side film sealing device. The front film sealing device is arranged on the outlet portion of the vacuum package machine. A film cutting device is further arranged on the front film sealing device. The side film sealing device is arranged on the upstream of the front film sealing device, a vacuum pumping device is further arranged on the upstream of the front film sealing device, and a semi-finished product delivery device is arranged on the upstream of the front film sealing device. The vacuum package machine has the advantages that the structure that a vacuum pumping tube is stretched into a bag is adopted so that a singe package bag can be vacuumized, the air pumping volume each time can be reduced to a great extent, and the operation efficiency of vacuum package can be improved; meanwhile, only one package bag is output backwards each time, so that the burden brought to following devices due to one-time input of a plurality of welding wire package bags is reduced.

A sand-preventing gas-preventing integrated oil production device comprises an oil pump and a gas anchor. The oil pump is provided with an outer tube and a plunger, the plunger is arranged in the outer tube in a penetrating mode, and the lower end of the outer tube is connected with a two-way coupling; the plunger is sleeved with a pump cylinder, the upper end of the plunger is connected with an upper traveling valve, the lower end of the plunger is connected with a lower traveling valve, the lower end of the pump cylinder is connected with a plurality of fixing valves, and the fixing valves are communicated with a center hole of the two-way coupling oppositely; the gas anchor is provided with an outer cylinder, an inner cylinder and a center tube, the upper end of the outer cylinder is provided with a liquid inlet hole, a screen is arranged outside the liquid inlet hole, the upper end of the outer cylinder is connected with a straightening ring, and the lower end of the outer cylinder is connected with a reducing coupling; the inner cylinder is located in the outer cylinder, the upper end of the inner cylinder is connected with the two-way coupling, and the lower end of the inner cylinder is connected with a two-way joint; the center tube is located in the inner cylinder, the upper end of the center tube is communicated with the center hole of the two-way coupling oppositely, and the lower end of the center tube is communicated with an oil inlet channel of the two-way joint oppositely. According to the sand-preventing gas-preventing integrated oil production device, in the oil production process, sand-preventing gas-preventing integration can be achieved, and oilfield exploitation benefits are improved.

The invention discloses an aerating, collecting and exhausting combining system in solid-state-composting aerobic fermentation. The aerating, collecting and exhausting combining system comprises a fermentation trough, a medium-pressure draught fan set, a composting heap turner, main aeration ditches, fishbone-type branch aeration ditches, aeration ventilating pipes, aeration plates, a membrane sealing structure and an independent exhausting structure; the invention provides an application of the aerating, collecting and exhausting combining system. The combining system and the application thereof have the advantages that the medium-pressure draught fan set can be momentarily adjusted according to the oxygen requirement in the biological aerobic fermentation stage, the best suitable oxygen requirement is provided, the multiple kinds of air amount can be further provided without changed air pressure, broken openings and the dispersion state are reduced, the stability can be kept for a long time, and the cost, the maintenance cost and the requirement electric quantity are lower; the cost of a gas collecting system can be reduced through the membrane sealing fermentation trough, the stench concentration is further increased, the air sucking amount is decreased, and the defects that due to a single-trough or multiple-trough gas collecting cover and the gas collecting mode of a whole workshop, the air sucking amount is large, the air sucking difficulty is high, the motor power is large, and stench is spread in the whole workshop are overcome.

The invention discloses a component cooling water pump for a nuclear power plant, which is a single-stage, single-suction, double-volute and horizontal arm-hanging type centrifugal pump. The pump is characterized in that a pump body is in a radial split-casing double-volute structure, one end of the pump body is provided with a suction inlet, and a pump cover is fixedly connected to the other end of the pump body; the upper side of the pump body is provided with a discharge outlet, and the suction inlet is perpendicular to the discharge outlet; a pump shaft passes through the pump cover and a bearing body; and a shaft seal assembly is composed of box-type mechanical seal components. The component cooling water pump disclosed by the invention has the advantages that the pump body is in a radial split-casing double-volute structure, and the centre line of an impeller is coincide with the centre line of the pump body, therefore, the radial force of the pump in the process of operating can be reduced, the shock resistance is enhanced, the service life is prolonged, and the volume of the pump is reduced; and because a thin-oil self-lubricating system is adopted, the pump can directly start without pre-lubrication, thereby enhancing the operating stability of the pump.

The invention discloses an ultrasonic anti-thrombus magnetic suspension cardiac apex centrifugal pump. A stator iron core (22) and a stator winding (23) are arranged in the wall of a pump cylinder (2), and a rotor permanent magnet (21), a rotor radial suspension magnet (24) and a stator radial suspension magnetic ring (25) are arranged in a rotor cylinder (4). A flow guiding cone (26) is arrangedin the center of the rear wall of a blade shell (7), a mechanical fulcrum ball socket (15) is arranged at the top end of the flow guiding cone (26), a mechanical fulcrum ball (5) is arranged at the rear end of the rotor cylinder (4), and the mechanical fulcrum ball (5) and the mechanical fulcrum ball socket (15) form a mechanical fulcrum (8). A fulcrum clearance (16) communicates with a drug catheter (18) and a drug injection plunger (19) through a center hole (17). The drug injection plunger (19) is implanted below the abdominal wall skin to accept anticoagulant liquid medicine to enter the fulcrum clearance (16). The flow guiding cone (26) is internally provided with an ultrasonic transducer (20) which can generate ultrasonic vibration to be transmitted to a centrifugal impeller (27) through the mechanical fulcrum (8), and thrombosis is prevented from being formed on the surface of the centrifugal impeller (27) through the ultrasonic cleaning effect.

The invention relates to a layered drainage structure of an underground powerhouse chamber of a hydropower station in a water-rich region and a construction method thereof. The technical problem to be solved by the invention is to provide the layered drainage structure of the underground powerhouse chamber of the hydropower station in the water-rich region and the construction method thereof, and the invention aims at effectively reducing the drainage and discharge capacity of the underground powerhouse, reducing the operation cost by power-driven drainage and discharge, and ensuring the safe construction of the underground powerhouse and a safe running period. The technical proposal for solving the problem is as follows: the layered drainage structure of the underground powerhouse chamber of the hydropower station in a water-rich region with great buried depth is provided with the underground powerhouse chamber, the bottom part thereof is provided with a water-collecting well and a power-driven drainage and discharge device, a plurality of layers of drainage galleries are arranged around the underground powerhouse chamber, the various layers of the drainage galleries are all communicated with the water-collecting well, and the layered drainage structure is characterized in that a layer of intercepting gallery is arranged in a mountain body above the underground powerhouse chamber which is higher than the water level of a river course, and the intercepting gallery is communicated with the water-collecting well through a vertical or inclined connecting gallery. The invention can be used for water conservancy and hydropower underground powerhouse chamber projects.

The invention provides a boiler feed water heating system of paralleling operation steam turbine units. The boiler feed water heating system comprises boilers, high-back-pressure steam turbines, low-back-pressure steam turbines, condensers, condensation water pools, circulating cooling water pumps, circulating water cooling towers, high-pressure heaters, low-pressure heaters and deaerators. Through the paralleling operation steam turbine units different in steam exhaust back pressure, exhaust steam and circulating water waste heat of the high-back-pressure steam turbines are used for replacing exhaust steam of the low-back-pressure steam turbines for heating of boiler feed water of the low-back-pressure steam turbines, and the energy saving aim of reducing the coal consumption rate in power generation of the turbines is achieved.

The invention discloses a floatation column intensified separation device with a filler structure. The floatation column intensified separation device with the filler structure comprises a hollow column body, wherein a foam collection device is arranged at the top of the column body; a filler, a middling mineralization pipe, a screen plate and a middling collection hopper are sequentially arranged inside the column body from top to bottom; a discharge hole connected with a tailing pipe is formed in the bottom of the column body; the middling collection hopper is connected with a middling nozzle through a middling circulating pulp pump; the middling nozzle is arranged at the top of the middling mineralization pipe; an air inlet pipe is arranged at the middle upper part of the middling mineralization pipe; and a crude ore feeding pipe is arranged at the upper part of the column body. The invention further provides an ore separation method. According to the separation device and the separation method, static separation is achieved on the mineralized mineral particles, the backmixing and inclusion of mineral impurities and fine silt which are not floatable are reduced, and the quality of a concentrate product is improved.

The invention relates a pump unit that driving a core identity by magnetic force. It includes an identity, a core identity, and a coil. A container is contained in the identity, and the outside is magnetic guiding material. The core identity has a certain length. And the inner margin shape could be set in the container. The coil is twisting outside the identity, and connecting to a circuit that supply current to coil to drive the core identity taking back and forth movement. The container connecting the hatch of the identity, and two single direction valve sections set the two ends of the identity to allow the liquid flow from the first location to the second location direction to achieve the function of driving the liquid.

The invention provides a pressure control system comprising a vacuum chamber, an air source, multiple grades of vacuum pump groups and a control unit. The vacuum chamber communicates with the air source through an intake pipeline. The intake pipeline is provided with an intake valve. The vacuum chamber communicates with the multiple grades of vacuum pump groups through an exhausting pipeline. A high vacuum valve is arranged on the exhaust pipeline. The intake valve, the high vacuum valve and the multiple grades of vacuum pump groups are connected with the control unit. The control unit controls the pumping speeds of the multiple grades of vacuum pump groups according to the target control pressure, so that pressure adjustment in a vacuum furnace is achieved. The invention provides a pressure control method. The pressure control method comprises the steps that the target control pressure is obtained; according to the target control pressure and a preset value, a high-pumping-speed pumpgroup and a low-pumping-speed pump group are controlled to started or stopped, if the target control pressure is higher than the preset value, the high-pumping-speed pump group is stopped, and the low-pumping-speed pump group is started, and if the target control pressure is lower than a preset value, the high-pumping-speed pump group and the low-pumping-speed pump group are both started. By the adoption of the pressure control system and the pressure control method, the change of the intake amount does not need to be changed, the cost is low, and the pressure control range is large.

A fuel pump includes a fuel pump housing made of stainless steel and having a pumping chamber therewithin, a plunger bore extending thereinto, an inlet passage extending thereinto, and an outlet passage extending thereinto. A pumping plunger reciprocates within the plunger bore such that an intake stroke of the pumping plunger increases volume of the pumping chamber and a compression stroke of the pumping plunger decreases volume of the pumping chamber. An outlet valve controls fuel flow from the pumping chamber out of the fuel pump housing. The outlet valve includes an outlet valve seating surface formed by the fuel pump housing within the outlet passage such that a nitrided layer extends from the outlet valve seating surface into the fuel pump housing. The outlet valve also includes an outlet valve member within the outlet passage which is moveable between a seated position and an unseated position.