276 results about "Pressure work" patented technology

LNG is regasified with concurrent power production in systems and methods where the refrigeration content of the LNG condenses a low pressure working fluid vapor and in which the combined refrigeration content of the warmed LNG and low pressure working fluid condensate condenses an intermediate pressure working fluid vapor.

The invention discloses a de-acidifying method for paper cultural relics, which comprises the following steps of: 1) flatly spreading acidified paper cultural relics on a flat board; 2) injecting an ion source reagent including OH- and Ca<2+> into a bubbler, and importing a mixed gas of helium gas and nitrogen to serve as a carrier gas, and transmitting the ion source reagent to a plasma spray gun; 3) turning on a plasma excitation pulse power source, forming ion flames containing OH- and Ca<2+> at the muzzle of the plasma spray gun; and spraying the ion flames to scan the surface of the flattened paper cultural relics to perform deacidifying processing. In the method disclosed by the invention, a plasma discharging form is adopted under normal temperature and normal pressure work conditions, thereby complex and expensive vacuum equipment are avoided being used, and damages of an aqueous solution infusion method to a paper body are avoided; and the method disclosed by the invention can be used for realizing rapid large-area deacidifying processing and has the advantages of uniformity for de-acidification, stable process, and suitability for industrialized large-scale production.

The invention relates to a high-densification slope filter which is developed by imitating the principle that a chub branchial filters hydroplankton. A group of (100 or more) unit hydra-screens with the thickness of 40mm are densely arranged on a support frame which can adjust inclination degree with a center distance of 100mm, the surface of each unit hydra-screen sprays a stock solution by a spraying pipe arranged on the top of each unit hydra-screen, and a small liquid collection groove arranged on the bottom of each unit hydra-screen collects concentrated solutions on the screen to form a branchial filtering unit; two branchial filtering units are placed in parallel, a liquid collection groove arranged on the lower middle part of a gap between the two branchial filtering units collects concentrated solution from both sides of the small liquid collection groove positioned below each unit hydra-screen, and a main liquid feeding pipe positioned on the upper part of the gap supplies original liquid to the spraying pipe on the top of each unit hydra-screen at the two sides through branched pipes so as to form a branchial filter. The branchial filter works depending on the pressure (about 20kpa), the concentrated solution on the screen is automatically collected through the small liquid collection groove and a total liquid collection groove, then filtered by the screen and finally discharged to the ground. The invention can be used for the primary concentration and filtering of suspending liquid and especially suitable for the primary filtering of a ship borne algae collecting system.

The invention discloses a shield tunneling machine with a mud water mode and an earth pressure mode. The shield tunneling machine comprises a mud water chamber, an air cushion chamber, a hydraulic communication valve, a screw conveyor, a mud box, a belt conveyor, a mud inlet pipeline, a mud discharge pipeline, a first circulating flushing pipeline and a second circulating flushing pipeline, wherein the mud water chamber is arranged between a cutter head and a shield body; the air cushion chamber is disposed between the mud water chamber and the shield body; the hydraulic communication valve isarranged between the mud water chamber and the air cushion chamber; the inlet of the screw conveyor connected to the bottom of the mud water chamber; the mud box and the belt conveyor are detachablyconnected to the outlet of the screw conveyor; the first circulating flushing pipeline can deliver the mud in the mud inlet pipeline to the central portion of the cutter head, and the second circulating flushing pipeline can deliver the mud in the mud box to the mud water chamber and the air cushion chamber. When the shield tunneling machine is in the mud water work mode, the hydraulic communication valve is turned on, the mud water chamber communicates with the air cushion chamber, and the outlet of the screw conveyor is connected to the mud box; when the shield tunneling machine is in the earth pressure work mode, the hydraulic communication valve is turned off, the mud water chamber blocks the air cushion chamber, and the outlet of the screw conveyor is connected to the belt conveyor. The shield tunneling machine has the advantages of wide applicable stratum range, multiple functions of the tunneling mode, high precision of pressure control and the like.

A sealing material for sealing liquid composed of a seal main body of resin, having a U-shaped cross section and a concave groove opening to an axis direction, and an 0-ring of rubber fit to the concave groove of the seal main body used for medical appliances and paint appliances. The seal main body is provided with an end lip portion on a side along the axis direction and a main lip portion on a middle position of the axis direction on a sliding face side, and, in a pressure-receiving state in which pressure works on the side along the axis direction and the O-ring is compressed, a dimension of the axis direction from a base end face of the seal main body on other side along the axis to a cross-section central point of the O-ring and another dimension of the axis direction from the base end face to an end portion of the main lip portion are set to be approximately equal.

A two-way explosion concrete device of self-spread preheat powder aqueous medium is used for manufacturing a high-density hard concrete metal or ceramic compound materials and functionally gradient materials of the ceramic compound materials, which consists of a plane wave generator, a high grade energy main charge, a pressure work steel tube, a waterseal unit, a wave impedance match unit, an outer protection tub or a protective unit, a self-spread dust electrical heating unit and a protective unit of sample. The present invention is designed to provide the two-way explosion concrete device of self-spread preheat powder aqueous medium that can produce a high-energy explosive detonated by plane detonation wave produced by two plane wave generators with symmetry layout and two-way explosion by making use of aqueous medium to transfer a plane explosive shock wave and self-spread high temperature synthetic reaction preheat powder.

The present invention discloses one kind of Al-Mg-Fe alloy for deoxidizing and desulfurizing molten steel. The Al-Mg-Fe alloy is produced through special pressure working, rather than smelting in a common induction furnace. It is one kind of energy-saving high purity alloy with alloy recovering rate as high as 100 %, no pollution and capacity of lowering steel deoxidizing and desulfurizing cost. It is suitable for deoxidizing and desulfurizing molten steel for making different steel products.

Provided is a vortex compressor. In the conventional vortex compressor, the fixed vortex disk top board bears the force generated by the pressure inside an enclosed space (compressing room) formed by two vortex disks at the scroll body side. At the side opposite to the scroll body, the fixed vortex disk top board bears the force generated by the pressure inside an ejecting pressure space. Affected by the combined force, the fixed vortex disk top board is deformed and forms a downward projection shape. On the other hand, the return vortex disk is deformed and forms an upward projection shape affected by the pressure worked on the backside of the return vortex disk. As the deformation may cause the tooth crest and the tooth root at the central section of the scroll body to contact with each other, the conventional vortex compressor increases the sliding loss, leads to the decrease of the performance, and reduces the reliability due to the sintering upon the sliding surface or due to the locking. The utility model aims at providing a vortex compressor featuring high reliability and efficiency. To achieve this objective, the upper portion of the top board of the fixed vortex disk is provided with a top board chamber and a connecting path which communicates the top board chamber with the backpressure chamber.

The invention discloses a working medium system for a Sterlin engine, which comprises a control module, a working medium system in the engine and a working medium system outside the engine, wherein the working medium system outside the engine comprises an air supply, an air admission system, a working bottle, an air inlet system, an exhaust system and a short circuit system; an inlet of the air inlet system is connected with the working bottle; an outlet of the air inlet system is connected with a low-pressure working cavity of the engine and is used for supplementing working media to the engine from the working bottle; an inlet of the exhaust system is connected with a high-pressure working cavity of the engine; an outlet of the exhaust system is connected with the working bottle and is used for pressurizing the working media discharged by the engine and storing the working media to the working bottle; two ends of the short circuit system are connected with the low-pressure cavity and the high-pressure cavity of the engine; the middle of the short circuit system is connected in series with a short circuit electromagnetic valve for controlling the short circuit; and the system can be applied to various Sterlin engines, in particular engines with frequently-converted working conditions, can use hydrogen, helium and other working media, and can recycle the discharged working media. The working medium system has the characteristics of high reliability, good safety and low operating cost.

A split-pressure, dual-pump system for supplying hydraulic fluid to a multi-speed transmission is provided. The system includes a low-pressure work circuit operatively connected to a fixed displacement pump, and a high-pressure work circuit operatively connected to a variable displacement pump. The system also includes a regulator valve fluidly coupled to the variable displacement pump via a decrease circuit and an overage circuit for regulating the flow of fluid to the high-pressure work circuit. The invention consists of separating the high-pressure needs of the system into a separate work circuit from the low-pressure needs of the system, and optimizing pump design separately for each work circuit to maximize transmission efficiency and reduce parasitic losses. A method of supplying hydraulic fluid to a multi-speed transmission at variable flow and pressure is also provided.

A mattress including a plurality of cells aligned and disposed on a body pressure working surface of a substrate that supports a human body; and a pressure control member that changes a height of each cell by adjusting a pressure in a fluid chamber formed within the cell. The cells are configured such that as the each cell is inflated by fluid supplied to the fluid chamber within the cell, the height of the each cell increases and a width dimension of the each cell in a direction of alignment decreases, and that peripheral portions of adjacent cells in the direction of alignment are overlapped with each other prior to cell inflation.

The invention provides a substrate conveying apparatus and method. The substrate conveying apparatus comprises the following components: a spaced rotary drive source (9) provided with a pair of guide rails (1), a workbench (3) supporting the lower portion of the substrate at two end portions in the width direction supported by the pair of guide rails, a nozzle body (19) that makes the positive/negative air pressure work on the end face in the width direction of the workbench between the guide rails, a pressure sensor (24) used for detecting the pressure changes of the gas resulting from the interval change of the nozzle body and the side face of the workbench by making the air pressure work on the side face of the replaced workbench and driving the guide rails equipped with the nozzle body in the direction approaching the side face of the workbench, when the substrate size is changed and the workbench is changed into a workbench having different width size, and a control apparatus used for detecting the pressure changes of the gas flowing through the nozzle body via a pressure sensor, controlling the driving of a rotary drive source, and setting the space for a pair of guide rails.

The invention discloses a slurry balance shield machine with the freezing function. A freezing unit, a storage tank and a heating device are independently arranged or are added to an accessory system behind the slurry balance shield machine; freezing circulation pipes are added in a cutter head or on the side face of the cutter head, or in a shield body or on the outer side of the shield body, and therefore liquid, semi-liquid and solid substances within a certain range around the cutter head, in a slurry warehouse and around the shield body can be frozen. Heating pipelines are additionally arranged on the side, close to an air cushion chamber, of a front partition plate, high-temperature heat conduction liquid is input into the heating pipelines and the freezing pipelines through the heating device, and therefore a main driving unit and a center rotating connector can be protected and a frozen area can be molten. The slurry balance shield machine with the freezing function performs maintaining operation under the normal pressure work condition, and the phenomenon of entering the warehouse for tool changing under pressure in the maintaining process of the slurry balance shield machine is avoided.

In a fuel supply control system for an engine in which a valve housing is provided with a negative pressure working chamber, and a negative pressure responsive-type control valve operable to be opened and closed in response to generation and extinction of a negative pressure in the negative pressure working chamber, the control valve being incorporated into a fuel passage between a fuel tank and a carburetor, the negative pressure working chamber being in communication with a negative pressure generating section in the engine through a negative pressure conduit, an oil flow-out preventing device is provided in a connecting portion for connecting the negative pressure generating section and the negative pressure conduit to each other. The oil flow-out preventing device is adapted to cut off the communication between the negative pressure generating section and the negative pressure conduit by a lubricating oil received from the negative pressure generating section, when the engine is inclined at a given angle or more. Thus, in an operational attitude of the engine, the transmission of the negative pressure from the negative pressure generating section to the negative pressure conduit is not obstructed, and even when the engine is inclined at the given angle or more in an operation-stopped state of the engine, the lubricating oil in the engine can be prevented from flowing out toward the negative pressure conduit.

Provided is a thin-film magnetic head for reading data from a magnetic recording medium and/or writing data to a magnetic recording medium, in which the magnetic spacing can be controlled appropriately by stably adjusting the pressure working between the thin-film magnetic head and the magnetic recording medium according to the change of conditions such as the change over time. This thin-film magnetic head comprises at least one through hole reaching a surface opposed to the magnetic recording medium of the thin-film magnetic head, for adjusting a pressure working between the thin-film magnetic head and the magnetic recording medium. Preferably, the head further comprises at least one flow-amount control means for controlling the flow amount of gas that flows via the at least one through hole.

The invention relates to a method for serially connecting a plurality of water pumps by using hoses and belongs to the field of a non-positive displacement pump. An emptying valve and a pressure sensor are arranged on a water pump water inlet pipe; an electromagnetic valve is arranged on the emptying valve; a signal output end of the pressure sensor is connected with a signal input end of a control unit; a signal output end of the control unit is connected with a control input end of the electromagnetic valve; water inlet and outlet pipes of at least two water pumps are correspondingly connected by using the hoses; a water outlet pipe port of a preceding stage pump is correspondingly connected with a water inlet pipe port of a succeeding stage pump; during operation of the water pumps, the control unit monitors water inlet pressure of the succeeding stage pump through the pressure sensor; when the water inlet pressure of the succeeding stage pump is lower than a pressure set value, the control unit controls the electromagnetic valve to open the emptying valve to automatically supplement air and pressure for the water inlet pipe of the succeeding stage pump, so that negative pressure working conditions of the water inlet pipe of the succeeding stage pump can be removed, and the hoses are prevented from being sucked by the water inlet of the succeeding pump; by means of the method, an operation mode of serially connecting the multi-stage pumps by using the hoses is achieved; the method can be widely applied to the field of design and manufacture of a movable water pump.

An axial compliant means for a scroll machine, wherein a second scroll revolves around a first scroll to form multiple compression chambers including a low pressure chamber, a medium pressure chamber and a high pressure chamber with working fluid pressure in them increasing gradually and radial-inwardly; a piston with multiple guided holes being subject to pressure of the working fluid connecting to one of those compression chambers through a flow passage is pushed-sliding straight by corresponding multiple guiding posts and pushing both of the scrolls to be axially in touch and sealed with each other.

The invention discloses a speed cooperative control method for a heavy and medium plate mill and conical roller beds and relates to the technical field of metal pressure working. The speed cooperative control method for the heavy and medium plate mill and the conical roller beds includes the following steps that according to a roller bed rolling parameter of a plate, a forward slip coefficient in a plate rolling process is calculated, and the roller bed rolling parameter is obtained from a rolling mill two-stage process model set system; speeds of the plate rolled in the roller bed at the inlet position and the outlet position of a rolling mill are calculated through the rotating speed of a roller of the rolling mill and the obtained forward slip coefficient; the rotating speeds of the rolling mill at the inlet and the outlet conical roller beds are calculated respectively according to the inlet speed and the outlet speed of the plate, the width of the plate and the geometrical shape parameters of the conical roller beds, the calculated rotating speed values are sent to a roller bed motor transmission system for execution, and therefore speed setting is conducted respectively for the front and the rear conical roller beds of the rolling mill. The speed cooperative control method for the heavy and medium plate mill and the conical roller beds solves the problems that the contact portion of the plate and the conical roller beds is poor in linear speed, and the surface quality of the plate and the service life of the roller beds are seriously affected.

The invention discloses a liquid metal pressure-driven type robot joint and self-generating electricity device. The liquid metal pressure-driven type robot joint and self-generating electricity devicecomprise a thermal-temperature-difference electricity generation liquid metal pressure working cylinder, a liquid metal magnetofluid generator, a servo valve, a magnetic pump, a robot joint body, a sensor, an intelligent controller, a one-way valve, a filter, an overflow valve and a liquid metal storage tank, a super capacitor. The liquid metal pressure working cylinder and a thermal-temperature-difference generator are combined to form an integrated structure, and the thermal-temperature-difference electricity generation effect is produced. The thermal-temperature-difference electricity generation liquid metal pressure working cylinder and the liquid metal magnetofluid generator are combined, and liquid metal of the robot joint device passes through a magnet and cuts a magnetic force line to produce liquid metal magnetofluid electricity generation effect. Therefore, the robot joint device has the dual self-generating electricity functions of thermal temperature difference electricitygeneration and magnetofluid electricity generation, and provides the electric energy guarantee for the walking motion of a robot.

A process is provided for scam welding advanced high strength steel sheets together. Respective end portions of first and second advanced high strength steel sheets are placed in overlapping contact with one another, and subjected to first and second weld passes. In the first weld pass, a seam welder including weld electrodes operate at a first-pass applied current and a first-pass pressure and are moved relative to the overlapping end portions at a first-pass carriage speed to establish a weld seam containing a weld nugget with a martensite phase. In the second weld pass, the weld electrodes operate at a second-pass applied current and a second-pass pressure and move relative to the weld seam at a second-pass carriage speed selected to fuse microcracks, lap openings, and porosity in the seam, relieve the residual stress in the joint, and temper the martensite phase of the weld nugget, and thereby form a weld joint.