72results about How to "Strengthen the pressure effect" patented technology

A system for pumping blood to assist or assume the cardiac function of a patient is characterized by a blood pump that exhibits a steep performance curve such that only small changes in pump flow occur for large changes in differential pressure across the pump. The pump therefore exhibits flow-limiting characteristics to protect the physiological system against harmful flow rates or pressures. Pump flow may also be limited by controlling the current provided to a driver from a power supply or by suitable restrictions within or external to the pump housing.

A seal backup ring is provided with undulating surfaces which create circumferential convergence with a relatively rotatable surface. The backup ring is configured so that differential pressure acting across a rotary seal forces portions of the backup ring against the relatively rotatable surface, closing, or substantially closing, the extrusion gap that the rotary seal is exposed to. In response to relative rotation between the backup ring and the mating relatively rotatable surface, the circumferential convergence promotes hydrodynamic lubrication within the dynamic interface that exists between the backup ring and the relatively rotatable surface. The modulus of elasticity of the backup ring is greater than the modulus of elasticity of the rotary seal.

A formation testing probe assembly comprising an elongated packer having a surface configured to be urged by the probe assembly towards a wall of a wellbore extending through the formation. The formation testing probe assembly further comprises a plate embedded in the elongated packer and including a central structural portion extending along a centerline of a substantial length of the plate, wherein the central structural portion is substantially thicker than remaining portions of the plate.

A battery powered wireless fluid pressure sensor has a sealed chamber which can be vented to the outside atmosphere through a re-sealable reference port to allow a user to set the reference atmosphere inside the pressure sensor enabling the pressure sensor to provide absolute, gauge and true gauge pressure readings. The sensor calculates and transmits the fluid pressure taking into account the temperature of the pressure transducer, the temperature of the electronic devices and the barometric pressure inside the sealed chamber to provide accurate pressure measurements over a wide range of operating conditions.

A seal backup ring assembly is provided that eliminates fluid differential pressure acting radially on the backup ring, preventing collapse of the backup ring against a shaft. The backup ring is assembled so that the initial clearance (extrusion gap) between the backup ring and relatively rotating member is not affected by the differential pressure acting across the assembly. This allows for an initially small extrusion gap to be present throughout the differential pressure range.

The invention relates to a single-screw extruder comprising a cylinder (1), which comprises a transition zone (14), and a homogenizing zone (12) that is connected to the transition zone (14), and a screw (2) which is rotatably supported in the cylinder (1) and which has at least two consecutive displacement parts (6, 8) in the homogenizing zone (12), the second displacement part of which in the conveying direction is designed as a shearing part. The aim of the invention is to provide a single-screw extruder which enables an improved melting effect along with an increased throughput, a lowered melt temperature, and an improved pressurization capability. According to the invention, it was recognized that this aim can be achieved in that at least one groove (4) running in the longitudinal direction in the inner cylinder wall is provided in the homogenization zone (12) of the single-screw extruder, and said groove ends in the area between a first displacement part and the subsequent shearing part (8) as viewed in the conveying direction.

There are provided an automobile heat exchanger having a header formed integrally with a tank and a method of manufacturing the same, and, more particularly, an automobile heat exchanger comprising a top header pipe unit formed of a pair of header pipes and a bottom header pipe unit formed of a pair of header pipes, the top header pipe unit to be connected to top ends of tubes and the bottom header pipe unit to be connected to bottom ends thereof, and the header pipe including a header formed integrally with a tank. In the heat exchanger, each header pipe is manufactured in a welded type or folded type so that the header is formed integrally with the tank. Accordingly, unlike a conventional heat exchanger, the present invention does not require any separate metal mold or assembling means for assembling the header and tank. Consequently, the manufacturing cost is reduced and the manufacturing time is shortened by simplifying the processes. Furthermore, the pressure strength in the header-tank increases and the risk of leaking a heat exchanging medium decreases, to increase the efficiency of heat exchange. Further, the width wise sectional shapes of the top and bottom header pipe units are controlled so that the condensate generated on the surface of a plurality of the header pipes is easily discharged.

A quick connector coupling assembly includes a retainer to connect a rigid tube to a hollow body component. A sleeve extending between a fluid sealing member and the retainer includes a rearward abutment surface in abutting contact with the retainer. The retainer locking arms include forward abutment surfaces in abutting relation with the tube upset and forward abutment surfaces in abutting relation with the sleeve. An insertion verifier includes a ring portion with axially extending legs positioned in the slots between the retainer locking arms. At least one leg includes a releasable latch engaged with the retainer in the slots between the locking arms. Guide elements on the retainer and insertion verifier align the verifier legs and retainer slots on insertion of the verifier.

The invention provides a novel fracturing chemical supporting coal bed gas mining method and belongs to the field of underground mineral resource mining. The novel fracturing chemical supporting coal bed gas mining method is characterized in that a supersaturated Ca(OH)2 aqueous solution is used as a fracturing solution; clay powder with the size being 300-500 meshes is added into the fracturing solution; segmental fracturing is conducted in the coal bed thickness direction; high-pressure CO2 is injected into a fracturing channel; the CO2 and Ca(OH)2 are utilized for a chemical reaction to generate a calcareous concretion supporting agent with high compressive strength in a fracturing seam, and the problem that existing supporting agents can hardly enter the fracturing seam is solved; the characteristics that the supercritical CO2 replaces and displaces coal bed CH4 is utilized; mine soaking is conducted; mining is conducted after the CH4 in a coal bed is fully replaced and displaced; and through the measures, production efficiency of coal bed gas resources is greatly improved, and capturing and storage of greenhouse gas CO2 are also achieved. The novel fracturing chemical supporting coal bed gas mining method is suitable for mining and utilization of underground coal bed gas or shale gas of different depths and different thicknesses, in particular for coal beds or shale beds of large thicknesses.

A detection method for enhanced 3D detection module includes a plurality of touch units configured to sense positions of touch points, a plurality of pressure-sensitive units configured to sense pressing forces and a signal processing circuit, the detection method including: providing a touch scanning pulse to the plurality of touch units and providing a pressure scanning pulse to at least two of the pressure-sensitive units; generating touch signals by the plurality of touch units in response to the touch scanning pulse sensing the positions of the touch points and generating a superimposed pressure signal by the at least two of the pressure-sensitive units in response to the pressure scanning pulse sensing the pressing forces; and determining a position and a pressing force value of at least one touch point by the signal processing circuit according to the superimposed pressure signal and the touch signals.

An intake system mounted to a vehicle controls an opening angle of a variable flap according to an RPM of an engine, an intake pressure, and an opening angle of a variable flap to optimize performance in various operation regions by detecting engine RPM and an intake air pressure, and determining an operation region based on the RPM of the engine; applying the intake pressure to determine a target amount of air and an opening angle of a variable flap for an operation region; driving an actuator to adjust an opening angle of the variable flap to a target opening angle; and analyzing an operation position of the actuator to detect an opening angle of the variable flap, and, when the target opening angle is not followed, correcting a drive of the actuator such that an opening angle of the variable flap follows the target opening angle.

A bearing member and a dynamic pressure bearing device using the bearing member includes a cylindrical body constituting a bearing member that rotatably supports a shaft member. The cylindrical body is made of a copper metal, and an anti-rust film comprising cupric benzotriazole is formed on the surface of the cylindrical body.

A semiconductor structure is disclosed. The semiconductor structure comprises: a substrate (130), a support structure (131), a base region (100), a gate stack, a spacer (240), and a source / drain region, wherein the gate stack is located on the base region (100), and the base region (100) is supported on the substrate (130) by the support structure (131), wherein the sidewall cross-section of the support structure (131) is in a shape of a concave curve; an isolation structure (123) is formed beneath the edges on both sides of the base region (100), wherein a portion of the isolation structure (123) is connected to the substrate (130); a cavity (112) is formed between the isolation structure (123) and the support structure (131); and there exists a source / drain region at least on both sides of the base region (100) and the isolation structure (123). Accordingly, a method for manufacturing the semiconductor structure is also disclosed.

Guide rails of a serried shelf comprise a base of guide rails and guide rails installed on ground base and mutually fixedly connected together, wherein the base section of the base of guide rails is U-shaped, the ends at both sides are respectively inwards bended to form two hems, a long groove is formed between the two hems, and the guide rails are positioned in the long groove and is fixedly connected with the bottom face of the base of guide rails. The guide rails are characterized in that the bottom face of the base of guide rails is further provided with small holes respectively abutted upon both sides of the guide rails, and the small hole is internally provided with a pressure-expandable plug bolt assembly for locating the guide rails. Compared with the existing technology, in the invention, bolts for fixing the base of guide rails are installed at both side abutted upon the guide rail so that the tension arm between the bolts and the guide rails becomes smaller; the compressing structure of the base of guide rails is reasonable, the pressure effect is good, and the guide rails are easily adjusted on a same horizontal surface, thereby being capable of improving the installation accuracy of the guide rails, and ensuring that roller wheels roll on the guide rails safely and steady.

A composite material implements self-healing microcapsules in thermoplastic matrices, such as polyethylene. A microencapsulated dicyclopentadiene monomer and a solid phase Grubbs's catalyst is embedded in a polyethylene matrix to achieve self-healing properties. Nanofillers may be added to improve the properties of the polyethylene matrix incorporating a self-healing system.

A regenerative heat exchanger for transferring heat from the exhaust gas to the intake working fluid of a prime mover. Application includes gas turbines for both motor vehicles and distributed electric generation. The heat exchanger employs a rotating matrix, which circulates through working fluid exhaust and intake channels while absorbing and rejecting heat between the two channels. Features include corrugated tubes for enhanced heat transfer, minimally welded low stress construction, quick-detach assembly of standard components, and purge flow sealing using recovered heat. Effectiveness exceeding 95% increases thermal efficiency of low-pressure ratio gas turbines.

A method for controlling an engine variable valve timing of a hybrid electric vehicle, may include providing a cam position setting table of a fuel efficiency prioritized intake / exhaust cam control mode, and a cam position setting table of a normal intake / exhaust cam control mode, the cam position setting table of the fuel efficiency prioritized intake / exhaust cam control mode being differentiated from the cam position setting table of the normal intake / exhaust cam control mode; selecting one of the fuel efficiency prioritized intake / exhaust cam control mode and the normal intake / exhaust cam control mode by a canister loading amount and whether or not diagnosis of an intake cam and diagnosis of an exhaust cam are completed; and determining position control values of the intake and exhaust cams by using the cam position setting table and then controlling positions of the intake cam and the exhaust cam by the determined position control values.

A pair of disk shape treatment bodies 14 and 16 for massaging the lesion in the leg, or the like, of the person to be treated are fitted to a driving shaft 12 to be rotated by a motor 10 so as to be able to approach / separation in this massage machine. The machine is provided with a control means 24 having a detector 26 for detecting the change of the treatment strength to be added to him or her from the bodies 14 and 16 and having a control part 28 for adjusting the treatment strength onto him or her based on the detection value of the detector 26. The change of a load current in the motor 10 is indicated as an example for the detection value detected by the detector 26. Besides, the treatment strength on him or her is adjusted by changing the rotational speed of the motor 10.

The invention discloses a press roller structure, and belongs to the field of agricultural machinery. The structure comprises a press roller body and a mounting rack used for installing the press roller body on a sower, the mounting rack is provided with a soil removing assembly used for removing soil on the surface of the press roller body, the soil removing assembly comprises a scraper plate anda scraper fastening spring assembly, the upper end of the scraper plate is installed on the mounting rack through a first connecting shaft, the lower end of the scraper plate makes contact with the surface of the press roller body, one end of the scraper fastening spring assembly is installed in the middle of the scraper plate through a second connecting shaft, and the other end of the scraper fastening spring assembly is installed on the mounting rack through a third connecting shaft. The press roller structure has the advantages that the scraper plate and the scraper fastening spring assembly are adopted for forming the soil removing assembly, the pressure in the direction of the press roller structure is applied to the scraper plate through the scraper fastening spring assembly so as to counteract the outward pushing force of the press roller to the scraper plate, and then the problem that in the use process of the scraper plate, damage or lightening or deformation or the like occurs is effectively prevented.

The invention relates to the technical field of enamel production equipment, and discloses an air tightness detection device for an enamel assembled tank. The device comprises a water tank, an assembled tank and a booster pump, wherein guide grooves are formed in the two sides of an inner cavity of the water tank, balance weight sliding blocks are movably installed in the guide grooves, one side of each balance weight sliding block is fixedly connected with a rotating box, a movable shaft is movably connected into the rotating box, and a fixing frame is fixedly connected to the position, located on the outer side of the rotating box, of one end of the movable shaft. Through the arrangement of the rotating box and the connecting piece, the assembled tank rotates in water, the surface of the assembled tank can receive pressure of water of different depths, it is ensured that the pressure bearing degree of all the positions of the assembled tank is kept within a certain range, the detection quality is improved, meanwhile, the pressure borne by all the positions of the assembled tank is constantly changed within a certain period of time, the pressure effect of water on the surface of the assembled tank is increased, the inspection strength of the assembled tank is increased, and the quality of the assembled tank product is improved.