109results about How to "High pressure regulation accuracy" patented technology

The invention discloses an electro-hydraulic combined braking system with the electric power function and applicable to a regenerative braking automobile. A braking pedal pushes a piston ejector rod of a braking master cylinder to move through a pedal push rod, and an electric braking power device assists in pushing the ejector rod of the braking master cylinder to move. The structure of combining a ball screw pair with a reacting disc is adopted for the electric braking power device, and therefore the torque output by rotation of a motor can be converted into linear movement of an output rod. In the braking process, the movement of the piston ejector rod of the braking master cylinder can be braked by controlling rotation of the motor. According to received collection signals of all sensors on the automobile, an electronic control unit controls a hydraulic control system and the electric braking power device and selects one braking mode, and the braking modes include the electric power mode, the regenerative braking mode, and the driving braking mode. The electro-hydraulic combined braking system has the advantages of having the electric braking power and driving braking functions, and being high in reliability, low in manufacturing cost, small in pressure fluctuation and high in pressure adjusting accuracy.

The invention discloses an accumulator system capable of automatically regulating inflation pressure, which comprises an accumulator, wherein the outlet of an air cavity of the accumulator is connected with the outlet of a supercharger; the inlet of the supercharger is connected with the outlet of a nitrogen cylinder through an inflation and detection device, and a decompression loop and the supercharger are parallelly arranged; the inflation pressure can change along with the set operation pressure of a hydraulic system so as to automatically accordingly change in proportion, and the pressure charging and decompression actions both adopt a program control box to carry out automatic control on an electromagnetic valve; and the whole process of inflation pressure in the air cavity of the accumulator is changed so as to not need manual intervention, the adjustable pressure range of an accumulator group is wide, the pressure regulation accuracy is relatively higher, and the self-regulation inflation pressure accumulator is energy-saving and environment-friendly.

The invention discloses a pressure-bearing underwater mining analog simulation testing device. The device comprises a supporting frame, a coal bed and a rock stratum, wherein the coal bed and the rock stratum are erected on the supporting frame, and a confined aquifer is arranged in the rock stratum and comprises ten small water bags. For the first to fifth small water bags, each water inlet (7) is formed in the middle of the corresponding left side wall (5) and located at the position close to the corresponding front side wall (3), and each water outlet (8) is formed in the lower portion of the corresponding right side wall (6) and located at the position close to the corresponding rear side wall (4). For the sixth to tenth small water bags, each water inlet (7) is formed in the lower portion of the corresponding left side wall (5) and located at the position close to the corresponding front side wall (3). By the adoption of the pressure-bearing underwater mining aquifer analog simulation testing device and method, approximate simulation of confined water can be achieved during coal mining when an aquifer exists in overlying rock.

The invention discloses a piston type axial flow pressure regulator which mainly comprises an axial flow regulation valve, a pressure regulation controller and a group of signal tubes connected with the pressure regulation controller and has the remarkable structure characteristics that separate flow passage, throttling and depressurizing functional component and guide mechanism functional component are designed in the axial flow regulation valve according to the separation principle. A cylinder sleeve is embedded between a valve seat and a valve sleeve to form an annular flow channel, and a piston is matched in the cylinder sleeve in a sliding manner to carry out pressure regulation and stabilization operation, so that the piston is guaranteed to be applied by the pushing and pulling action force in the axial direction only when sliding in the cylinder sleeve, the defects of large flow resistance, large vibration and high noise as the a turbulent flow is easily generated due to a meander flow passage with lower inlet and upper outlet of the traditional regulation valve are well overcome, and the technical effects of further improving the pressure regulation accuracy and pressure regulation stability are very obvious. The piston type axial flow pressure regulator has the outstanding advantages of simple and rapid structure, liability in production, low manufacturing cost, high pressure regulation accuracy, good stability of output pressure, safety and reliability in running and long service life and has very good popularization and application prospect.

The invention relates to a large-caliber high-pressure pressure regulating valve for a pneumatic test device, and belongs to the technical field of valves. The large-caliber high-pressure pressure regulating valve for the pneumatic test device comprises a gas inlet (1), a gas outlet (2), a valve body (3), a valve plug (4), a valve seat (5), an upper cover (6), a lower cover (7), a balance air cylinder (8), a balance gas pipe (9), an oil cylinder supporting frame (10) and a driving oil cylinder (11), wherein the size of a gas flow channel between the valve plug (4) and the valve seat (5) is changed through vertical movement of the valve plug (4), and pressure regulation and pressure stabilization are achieved. According to the large-caliber high-pressure pressure regulating valve for the pneumatic test device, due to the facts that the balance air cylinder (8) is arranged in the valve body (3), and is connected with the gas inlet (1) through the balance gas pipe (9), and high-pressure gas before the valve serves as gas for balancing the large-caliber high-pressure pressure regulating valve for the pneumatic test device, driving force of the large-caliber high-pressure pressure regulating valve can be greatly reduced, regulation precision is improved, rapid pressure stabilization and rapid pressure adjustment are achieved, the range of pressure regulation is wide, and the full-opening time and the full-closing time are short.

The invention relates to a hydraulic oil supply unit which comprises an oil flow regulating device, an oil pressure regulating device, a control unit (4) and an oil supply control oil way (10), wherein the oil supply control oil way (10) is provided with a flow detection device (2); one of the oil flow regulating device and the oil pressure regulating device is arranged on the oil supply control oil way (10), and the other one is used for controlling a hydraulic pump; the oil flow regulating device and the oil pressure regulating device are respectively and electrically connected with the control unit (4), so as to regulate the oil flow (Qs) and the oil pressure (Ps) of the hydraulic oil supply unit through the control of the control unit; and the flow detection device (2) is electrically connected with the control unit. In addition, the invention further provides an oil supply control method and a hydraulic power unit of the hydraulic oil supply unit. In the aspects of constant pressure oil supply control, constant-current source oil supply control and the like, the hydraulic oil supply unit, the hydraulic power unit and the oil supply control method have the advantages of higher control flexibility, wider applicability and better energy saving, and the control precision is obviously increased.

The invention relates to a precision voltage regulation and stabilization device, which can meet the requirements of precision voltage regulation and stabilization for a high-voltage power supply. The invention is characterized in that the precision voltage regulation and stabilization device comprises a low-voltage compensating regulation and controlling circuit, a sampling circuit, a comparator, a controlling circuit, an isolating driving circuit, a regulator circuit, an electronic switch, a D/A electric circuit and a CPU electric circuit; after a CPU outputs a digital voltage signal, the D/A electric circuit transmits the voltage signal converted by the D/A electric circuit to the comparator, the comparator compares the transmitted reference voltage and the sampled voltage, the electronic switch is turned off after the transmitted reference voltage and the sampled voltage pass through the controlling circuit and the isolating circuit, and the rectified 100Hz voltage flows when the voltage of the sampling end is raised to the reference voltage. The invention has the advantages that compared with the old type mechanical voltage regulator, the precision voltage regulation and stabilization device has small volume, light weight, high voltage regulation precision, and continues and adjustable output voltage, can be directly connected with a monolithic processor to realize remote voltage-stabilized power, and has certain economic benefit.

The invention provides a pressure regulating valve which comprises a valve body, a fluid flow channel, a cylindrical flow guide screen sleeve, a piston and a piston driving mechanism, wherein the cylindrical flow guide screen sleeve is arranged in the fluid flow channel. A plurality of through holes are formed in a through-flow portion of the flow guide screen sleeve and axially extend along the flow guide screen sleeve, fluid flowing from an inlet of the pressure regulating valve flows to a downstream side through the through holes and flows out of the valve body through an outlet of the pressure regulating valve, the piston driving mechanism is used for driving the piston to axially move along the valve body, the piston can axially move along the flow guide screen sleeve, so that the piston is jointed with the inner wall of the flow guide screen sleeve, the piston axially moves along the valve body under the driving action of the piston driving mechanism, the jointed position of the piston and the inner wall of the flow guide screen sleeve is controlled, the area of the through holes for flowing of the fluid in the flow guide screen sleeve is controlled, and pressure is regulated. On the premise of wide pressure regulating range, the pressure regulating valve is small in size, simple in structure and high in accuracy, and the influence of the driving mechanism on flow of the pressure regulating valve is minimized.

The invention relates to a reversible adjustment dynamic voltage adjuster. The reversible adjustment dynamic voltage adjuster comprises a DSP control circuit, two PWM converters connected in series, and a sine wave filter which is in an inversion state and composed of inductors and capacitors. One end of an input voltage passes the secondary side of a series compensation transformer and then is output to a load through the sine wave filter, output of the first PWM converter is connected with the two ends of the primary side of the series compensation transformer, and output of the second PWM converter is connected with the front end of the load; An energy storage flat wave capacitor is connected between the two converters connected in series, the DSP control circuit acquires input voltage instantaneous values and input voltage phase signals, the DSP control circuit outputs control signals to the two PWM converters, and the working states of the two PWM converters are adjusted. Through two-way adjustment of energy, interference of fall and rise of network voltages in power consumers can be quickly restrained, and therefore the power quality of a power distribution system is improved.

The invention discloses a self-operated pressure regulator which can eliminate membrane aging and widen the application range of a valve. The self-operated pressure regulator is characterized by comprising an upstream pressure tapping pipe (1), a control valve (2), a director (3), a regulating valve (4), a throttling valve (5), a downstream pressure tapping pipe (6) and a downstream pressure tapping point (7), one end of the upstream pressure tapping pipe (1) is connected with the control valve (2), the other end of the upstream pressure tapping pipe (1) is connected with the front end of the director (3), the regulating valve (4) is connected with the upper end of the director (3), the rear end of the director (3) is connected with one end of the downstream pressure tapping pipe (6) through the throttling valve (5), and the other end of the downstream pressure tapping pipe (6) is connected with the downstream pressure tapping point (7).

The invention relates to a safety throttle valve comprising a valve body, a taper spool and a slide spool. The valve body is internally provided with a first cavity and a second cavity. The taper spool is arranged inside the first cavity. The slide spool is disposed inside the second cavity. A first spring is disposed between the taper spool and the valve body. The valve body is provided with a first radial hole. The slide spool is internally axially provided with a third cavity and a fourth cavity. The slide spool is provided with a second radial hole and a third radial hole. The second radial hole is communicated with the third cavity. The third radial hole is communicated with the fourth cavity. A damping hole is provided between the third cavity and the fourth cavity. A second spring is disposed inside the second cavity. The first radial hole is connected with an opening T connected with an oil tank. The valve body is provided with an oblique hole; one end of the oblique hole is communicated with the first cavity, and the other end of the oblique hole is communicated with the opening T. The safety throttle valve as functional as a universal safety valve and a universal throttle valve is compact in structure, requires only one mounting hole, is convenient to mount, has small pressure regulation error, is high in pressure regulation precision and allows stable flow regulation.

The invention discloses a self-pressure-loading type pressure regulator. The self-pressure-loading type pressure regulator is mainly composed of a main pressure regulating valve and a pressure regulating controller, wherein the regulating controller is of an integrated structure formed by connecting a pilot valve and a pressure regulating valve. The self-pressure-loading type pressure regulator is structurally characterized in that combined pressure regulating and pressure stabilizing structures are assembled in the pilot valve and the pressure regulating valve respectively, wherein each combined pressure regulating and pressure stabilizing structure is formed by connecting a pilot throttling valve clack and a pressure regulating throttling valve clack in series and used for carrying out secondary throttling and dual switching-off on pressure regulating signals; after secondary throttling pressure regulating and pressure stabilizing are carried out through the pressure regulating controller, stable pressure regulating signals are input into the main pressure regulating valve for pressure regulating and pressure stabilizing work, and then the purposes of automatically regulating output gas pressure and making the output gas pressure tend to be stable can be achieved. Trials show that the self-pressure-loading type pressure regulator indeed has the outstanding advantages of being simple in structure, reasonable in design, low in production and manufacturing cost, convenient to install and use, high in pressure regulating precision, good in output gas pressure stability, high in switching-off sealing property, safe and reliable in operation and long in service life, and has excellent application and popularization prospects in the gas delivery industry.

The invention provides an automotive CNG pressure reducer with a novel piston type pressure reducing mechanism. The automotive CNG pressure reducer with the novel piston type pressure reducing mechanism comprises a pressure reducer main body; the bottom of the pressure reducer main body is provided with a high-pressure magnetic valve assembly, the side section of the pressure reducer main body is provided with a high-pressure inlet seat assembly and a piston type pressure reducing mechanism assembly, the high-pressure inlet seat assembly is communicated with the high-pressure magnetic valve assembly, and the high-pressure magnetic valve assembly is communicated with the piston type pressure reducing mechanism assembly; a balance valve assembly and a two-level diaphragm-type pressure reducing mechanism assembly are arranged in the pressure reducer main body, the two-level diaphragm-type pressure reducing mechanism assembly is communicated with the piston type pressure reducing mechanism assembly, and the balance valve assembly is connected with the two-level diaphragm-type pressure reducing mechanism assembly.

The present invention relates to a new type of regulator valve pilot, comprising: a lower housing, a locking spring, a shutter spring, a shutter spring seat, an obturator plug, a moving seat, a middle housing, a membrane, a lower double spring seat, an upper housing, Large adjustment spring, small adjustment spring, upper double spring seat, guide nut, adjustment bolt, connecting rod. Its characteristics are: the lower shell, the middle shell and the upper shell are fixed with screws, and two membranes divide it into three cavities; the lower shell is equipped with a locking spring, a shutter spring, a shutter spring seat and an obturator plug; The rod is installed on the middle housing; the upper housing is equipped with double spring seats, adjusting springs, guide nuts and adjusting bolts. The beneficial effect is: when the small regulating spring works, the pressure value is small, so that the downstream pressure rises slowly. When it is compressed with the large regulating spring at the same time, because there is already a certain pressure downstream, the pressure will continue to rise steadily until it reaches the working pressure, which can reduce the gas pressure. Impact on downstream equipment, improve pressure regulation accuracy, and ensure stable working pressure.

The invention discloses a high-precision quick response pilot valve which comprises a valve body, a pressure regulating valve port, a pressure regulating diaphragm assembly, and a damping diaphragm assembly. In the invention, the valve body is internally provided with a diversion passageway formed consisting of a valve cavity and a pressure regulating air passage, wherein the valve cavity is communicated with a forward press air flow importing interface, and the pressure regulating air passage is communicated with a pressure regulating inductive interface; a pressure regulating valve core and a damping valve core can displace with the pressure fluctuation of a main pipeline to form a damping variable type pressure regulating structure; and the damping variable type pressure regulating structure can quickly collect the pressure fluctuation inside a main inductive gas transmission pipeline and timely transmit a pressure regulating signal to a pressure regulator, which has remarkable effect on improving pressure regulating speed and pressure regulating precision. The high precision quick response pilot valve is especially suitable for matching to be installed with an indirect type pressure regulator for using, and can be widely applied to the gas transmission pipelines with mass medium-high pressure flux and large transient variation range for pressure regulating operation and pressure stabilizing operation. The invention has the advantages of quick pressure regulating response speed, high pressure regulating precision, good pressure regulating stability, and excellent market application prospect.

The invention relates to a pressure regulating mechanism, a cover body and a pressure cooking utensil. The pressure regulating mechanism comprises a bracket, a pressure regulating part and a fitting piece, and the pressure regulating part is arranged between the fitting piece and the pressure regulating valve; the fitting piece can perform reciprocating motion in the first direction relative to the support, the fitting piece and the pressure regulating part are in rolling friction fit, the pressure regulating part can move in a second direction intersecting with a first direction relative to the bracket under the action of the fitting piece and is linked with the pressure regulating part to move in the second direction relative to the bracket. The fitting piece and the pressure regulatingpart are in rolling friction fit, and the friction between the fitting piece and the pressure regulating part is reduced; due to the fact that the friction is relatively small, the sensitivity is high, and then the pressure regulating precision of a pressure regulating mechanism is high.

The invention discloses a decompression valve, which belongs to the field of decompression equipment, and mainly solves the problem that the sealing effect of the decompression valve is not good under the high temperature and high pressure working condition of the common flange gasket sealing form at present, which will cause leakage. The fixed value spring is fixedly installed on the lower part of the valve, and the fixed value spring is stretched or relaxed corresponding to the desired output pressure. Through the possibility of arranging two fixed value springs in the valve, a larger adjustment range is obtained for the output pressure. The lower side of the fixed value spring is provided with a piston, the two sides of the piston are provided with a Y-shaped ring, the left side of the Y-shaped ring is provided with a stop pin, the lower part of the Y-shaped ring is provided with a fixed seat, and the two sides of the fixed seat are provided with O Type ring, the lower side of the fixed seat is fixedly connected with a spring plunger, and a balance spring is arranged below the spring plunger, and the balance spring is connected with the valve body. The present invention is novel and unique, and in terms of internal design, the pressure value is regulated by the air pressure and the spring elastic force, and the pressure regulation precision is higher.

The invention discloses a vacuum interrupter aging device based on real-time voltage regulation, including a base. The top of the base is fixedly connected with a case. A partition board is fixedly connected between the two sides of the inner wall of the case. The top of the partition board is fixedly connected with a voltage regulation box. A resistance coil rod and a guide copper bar are fixedlyconnected in sequence from top to bottom between the two sides of the inner wall of the voltage regulation box. The outer surface of the resistance coil rod is connected in a sliding manner with a first conductive copper sleeve. The outer surface of the guide copper bar is connected in a sliding manner with a second conductive copper sleeve. The invention relates to the technical field of electric power facilities. By using the vacuum interrupter aging device based on real-time voltage regulation, the precision of voltage regulation is greatly improved, the effect of voltage regulation is enhanced, high-precision mechanical voltage regulation on aging equipment is realized, the voltage of aging equipment can be regulated quickly and conveniently, and great convenience is brought to peoplein vacuum interrupter aging.

Distributed flexible voltage regulation topology of distribution network based on AC-AC converter belongs to the technical field of power distribution and voltage regulation in distribution network operation, especially relates to a distributed flexible voltage regulation topology of distribution network based on AC-AC converter . The invention provides a distributed flexible voltage regulation topology structure of a distribution network based on an AC-AC converter, which can ensure the pass rate of the voltage at the user end and improve the quality of power supply. The invention includes a power frequency double-split transformer, a first double buck/boost AC-AC converter module, a second double buck/boost AC-AC converter module, an inductance L, a capacitor C and a bypass switch S, the main point of its structure is that the first secondary side of the power frequency double-split transformer is connected to the input end of the first double step-down/boost AC-AC converter module, and the second secondary side of the power frequency double-split transformer is connected to the second double step-down/step-up AC-AC converter module. The input terminals of the step-up AC-AC converter module are connected.