519results about How to "High work pressure" patented technology

The invention discloses a light five-cylinder plunger pump. The light five-cylinder plunger pump comprises a power end assembly and a hydraulic end assembly, wherein the power end assembly is connected with the hydraulic end assembly; the cylinder spacing of the light five-cylinder plunger pump is 9in; the power end assembly comprises a crank shaft, the crank shaft comprises six crank necks and five crank throws, the crank necks and the crank throws are fixedly connected, the distance between rotating centers of the crank necks and the crank throws is 101.6 mm, and the stroke distance of the light five-cylinder plunger pump is 203.2 mm. According to the light five-cylinder plunger pump, power is increased by increasing stroke, reducing transmission ratio and improving bearing capacity, andmeanwhile, dead weight is reduced by reducing the cylinder spacing, the tooth number of a big gear and the tooth thickness of the big gear and a pinion. The light five-cylinder plunger pump meets conditions of working in the area with severe well cementing operation conditions in aspects of weight and power simultaneously, and working efficiency is increased.

The invention provides a 2D (2-dimensional) hydraulic-power-assisted electro-hydraulic proportional reversing valve, which comprises a valve body, a valve core, a valve sleeve, a linear electro-mechanical converter and a compressive-torsional coupling, wherein the valve core, the compressive-torsional coupling and the linear electro-mechanical converter are coaxially connected; an output shaft of the linear electro-mechanical converter is fixedly connected with an input end of the compressive-torsional coupling; an output end of the compressive-torsional coupling is fixedly connected with the right end of the valve core; a sensitive cavity is formed by the left end of the valve core, the valve sleeve and a left cover plate; a pair of axisymmetric high pressure holes and a pair of axisymmetric low pressure holes are respectively formed on the surfaces of shoulders of the valve core in the sensitive cavity; a pair of axisymmetric sensing channels are arranged on the inner surface of the valve sleeve outside the sensitive cavity; and one end of each receptive channel is communicated with the sensitive cavity, and the other ends of the receptive channels cover areas between adjacent high pressure holes and low pressure holes. The 2D hydraulic-power-assisted electro-hydraulic proportional reversing valve not only has the characteristics of high flow rate, high working pressure, and the like of an ordinary pilot-control type electro-hydraulic proportional valve, but also fulfils a proportional control function like a direct-actuated proportional valve under the circumstance of zero pressure (pressure loss).

An irrigated finned ablation head that provides enhanced cooling. The irrigated finned ablation head comprises a plurality of radial fins that are distributed about a central axis and that extend axially from a common base. The plurality of fins are arranged to define a central passageway along the central axis, as well as a plurality of slots therebetween, the slots extending in an axial direction along the irrigated finned ablation head. In one embodiment, the central passageway extends through the irrigated finned ablation head, defining an opening at the distal extremity, with the slots extending from the base to the opening. In another embodiment, the irrigated finned ablation head includes a cap portion at a distal portion that is common to all the radial fins, so that the slots are terminated at the distal portion of the irrigated finned ablation head. The radial flow distribution along the central axis can be tailored by the configuration of the central passageway.

A thermal energy storage and recovery arrangement is provided. The arrangement has a first thermal energy storage, a compression and expansion unit coupled thereto, and a second thermal energy storage coupled to the compression and expansion unit. The first and second thermal energy storage are adapted to work at a temperature equal to or higher than ambient temperature. In a charging mode, the first thermal energy storage is adapted for receiving and releasing thermal energy to a received working medium. The compression and expansion unit is adapted for receiving and compressing the working medium from the first thermal energy storage. The second thermal energy storage is adapted for receiving the compressed working medium and thermal energy therefrom and storing at least part of this energy. The compression and expansion unit is adapted for receiving the compressed working medium from the second thermal energy storage and expanding the compressed working medium.

An absorptive refrigeration method that employs a refrigerant comprising one or more hydrofluoroolefin or hydrochlorofluoroolefin refrigerants, and an oil selected from the group consisting of a polyalkyene glycol oil, a poly alpha olefin oil, a mineral oil and a polyolester oil.

The invention relates to a buoyancy regulating device for an underwater robot, in particular to a bidirectional oil discharge type buoyancy regulating device for an underwater robot. The bidirectional oil discharge type buoyancy regulating device provided by the invention comprises an inner leather bag, a direct current motor, a solenoid valve, a one-way valve, a bidirectional gear pump, a stern end cover and an outer leather bag, wherein the stern end cover is in sealing connection with an underwater robot cylinder body; the outer leather bag is mounted outside the stern end cover; the inner leather bag, the direct current motor, the solenoid valve, the one-way valve and the bidirectional gear pump are respectively mounted in the underwater robot cylinder body; the inner leather bag is connected to the bidirectional gear pump driven by the direct current motor through a pipeline; and the solenoid valve and the one-way valve are in parallel connection between the bidirectional gear pump and the outer leather bag through a pipeline. According to the invention, the bidirectional gear pump is driven by the direct current motor and the oil discharge or backflow is realized by means of the positive and negative rotation of the bidirectional gear pump, so as to regulate the buoyancy of the underwater robot. The buoyancy regulating device has a simple structure, is safe and reliable, and has strong buoyancy regulating capability. The maximum buoyancy regulating variable can be flexibly regulated just by regulating the volumes of inner and outer leather bags.

A compressed gas foam system is provided. The compressed gas foam system includes one or more optional fluid pumps, one or more mixing devices, one or more optional foam systems; one or more optional gas compressors, and a system controller. A method of using the compressed gas foam system is also provided.

The invention relates to an efficient constant-pressure-difference intermittent rotation extrusion abrasive flow polishing method and belongs to the technical field of automatic polishing of large-size complex-curved-surface type part intermittent rotation extrusion abrasive flows which are high in surface quality uniformity requirement. The method comprises that a gear is driven by a hydraulic motor to be meshed with a negative-clearance rotation disc bearing to perform rotation grinding polishing, seal rings are arranged at all connected faces to achieve high-pressure abrasive static seal, easily abrasive seal rings are arranged at the rotation friction positions special high-pressure abrasive seal rings and high-pressure abrasive seals are arranged at the piston abrasive extrusion positions to achieve high-pressure abrasive dynamic seal, and finally, high-pressure abrasive intermittent rotation grinding and polishing are achieved. The 'over-polishing' and 'rounding' phenomena of traditional abrasive flow extrusion are prevented, efficient precise uniform polishing of complex curved surfaces of impellers, blades and the like high in pneumatic performance and surface uniformity is achieved, and the surface roughness Ra of various complex parts can be reduced below 0.8.

The reversible hydraulic pressure converter (1) employing tubular valves includes a medium-pressure stage (44) consisting of a medium-pressure cylinder (2) and a double-acting medium-pressure piston (3) the position of which is sent to a control computer of the converter (19) by a piston position sensor (14), the cylinder (2) and the piston (3) forming two medium-pressure chambers (5) that can be placed in communication with a medium-pressure inlet-outlet circuit (15) by at least one tubular valve (12), the converter (1) also including two high-pressure cylinders (9) each cooperating with a high-pressure piston (8) of smaller diameter and defining two high-pressure chambers (11) that can be placed in communication with a high-pressure inlet-outlet circuit (16) by at least one tubular valve (12), each of the various tubular valves (12) cooperating with an independent valve actuator (13).

A system, which is used especially as a fuel injection system for the high-pressure injection in internal combustion engines, includes a fuel distributor and a plurality of fuel injectors. Each fuel injector is situated on a cup of the fuel distributor. At least one of the fuel injectors is fastened to the associated cup by a holding element. The holding element has an at least essentially straight first leg and an at least essentially straight second leg. The cup includes at least one recess, which extends through a wall of the cup. The first leg and the second leg are guided through the at least one recess. Furthermore, the connection sleeve of the fuel injector has a collar, which is braced on the first leg of the holding element and on the second leg of the holding element in order to secure the fuel injector on the cup. This makes it possible to fasten the fuel injector on the cup in a reliable manner.

The invention provides a free piston engine, which comprises a cylinder block, a compression accumulator, a pump station and a piston assembly, and also comprises a first proportional overflow valve, a proportional pressure reducing valve, a proportional velocity regulating valve and a pressure sensor; a piston chamber in the cylinder block is divided into a combustion chamber, an air intake chamber, a balance chamber, a pump chamber and a compression chamber by the piston assembly. As a pipeline connected with two inlets of a compression main port and a compression starting port of the compression chamber and the compression accumulator is provided with the proportional pressure reducing valve, the proportional velocity regulating valve, a reversing valve, the proportional overflow valve and the pressure sensor, according to the detection signal of the pressure sensor connected with the compression accumulator, the reversing valve is switched between the compression accumulator and an oil supply accumulator, and therefore oil supply work on high and low-pressure two oil lines is completed by utilizing one hydraulic pump station; moreover, after hydraulic oil in the compression accumulator flows through the proportional pressure reducing valve, stable pressure can be obtained and supplied for the compression chamber, so that the pressure of the inlet of the compression chamber is stable.

The present invention relates to a pilot type hydraulic overflow valve. Its main valve body has front end cover, in said main valve body a main valve seat, a main valve buckle, a main valve core and a main valve spring are set, and said pilot valve is formed from its valve seat, valve core and pressure-regulating spring, said pilot valve is connected with said main valve. Said invention also provides the structure of main valve and pilot valve, and provides the application range of said valve.

A bandage with lengthwise elasticity in the warp direction, comprising a textile expanse woven in leno weave and having weft threads, leno threads and elastically extensible warp threads. The warp threads are cotton-elastic threads.

The invention relates to an air conditioner, comprising indoor unit and outdoor unit. Indoor heat exchanger and air supply apparatus are set in the indoor unit. Thereinto, there is at least a heating device in the indoor device and the heating device runs during defrosting of said air conditioner. The heating device is set at the upstream or downstream of indoor heat exchanger. The invention provides a control method of air conditioner. The method comprises defrosting of air conditioner when achieving the condition of defrosting and running of heating device at least when said air conditioner defrosts. The air conditioner and the control method of invention can shorten the defrosting time and make the indoor temperature not decrease. Furthermore, it can make the temperature in door improve quickly under the low temperature.

The invention belongs to metal casting device. The magnesium alloy cast is complex, and the performance is bad. The invention is a magnesium alloy casting device which fills shape in vacuum state and solidifies them in various pressure state. It can realize the optimized casting process condition, it can be applied to produce each kind of large, complex, thin magnesium alloy casting piece with precise size and high thickness.

Nozzle device and nozzle for atomization and/or filtration as well as methods for using the same. The nozzle and nozzle device for atomization, in particular a micro-machined reinforced nozzle plate, may produce small liquid droplets in air (spray) or into a liquid (emulsion) with a narrow droplet size distribution and make small air bubbles into a liquid (foam). A nozzle part for filtration as well as elements and methods to facilitate atomization and filtration are also disclosed.

The invention discloses a pilot proportional reversing valve, which comprises a main valve body and a pilot control valve arranged on the main valve body, wherein both ends of the main valve body are provided with a left end cover and a right end cover; and a main valve core and a main spring are arranged in the main valve body. The pilot proportional reversing valve is characterized in that: the pilot control valve comprises a pilot valve body and a left and a right proportion electro-magnets arranged at both ends of the pilot valve body; and a proportional reducing valve is arranged between the main valve body and the pilot valve body. The pilot proportional directional valve has the advantages of simplified structure, low cost, reduction of extravasation link, good spring guidance, high reliability and strong capability of resisting oil pollution.

The invention discloses special hair darkening and strengthening shampoo for men; Chinese medicine extract is added into a prepared shampoo matrix main component, mixed and stirred uniformly, and the special hair darkening and strengthening shampoo for men is obtained; the formula comprises the following components in parts by weight: 75 to 85 parts of shampoo matrix main component and 15 to 25 parts of Chinese medicine extract; the Chinese medicine extract is prepared from the following raw materials in parts by weight which are mixed: 10 to 20 parts of radix-polygoni multiflori extract, 10 to 20 parts of ligustrum lucidum extract, 5 to 15 parts of rehmannia extract, 5 to 15 parts of mulberry extract, and 5 to 15 parts of peach kernel extract. The Chinese medicine extract essence contained in the shampoo has the function of darkening hair by activating tyrosinase activity and promoting the generation of hair melanin. In addition, the special hair darkening and strengthening shampoo for men also has the functions of nourishing scalp, strengthening and softening the hair, and darkening and thickening hair, and can effectively solve the problems that the air of men are yellow, white, frail and easy to fall off.

The invention relates to an internal-condensation capacity-reducing solar medium and high temperature heat collection pipe and a method for manufacturing the same. The heat collection pipe comprises a vacuum internal-condensation solar heat collector, wherein the vacuum internal-condensation solar heat collector consists of an outer cover tube which is made of a light-transmitting material, a heat absorption tube which is coaxial with the outer cover tube and a composite parabolic reflecting plate which is assembled between the outer cover tube and the heat absorption tube; a heat energy conductor is arranged in the vacuum internal-condensation solar heat collector; the heat energy conductor consists of a metal sleeve, a metal flow guide cavity tube which is assembled in the metal sleeve, and heat conduction media which are filled in the metal sleeve and the metal flow guide cavity tube; the metal sleeve is inserted into an internal cavity of the heat absorption tube and tightly contacted with the heat absorption tube; and a heat conduction heat medium transmission path is formed between the metal flow guide cavity tube and the metal sleeve. The preparation steps of the high temperature heat collection pipe are as following: manufacturing focus solar collector in vacuum, processing heat sensor, and then assembling and moulding. The internal-condensation capacity-reducing solar medium and high temperature heat collection pipe is high in heat collection efficiency, high in heat transfer speed and safe, and can convert solar energy into a medium and high temperature heat source for use.