59results about How to "Avoid throttling losses" patented technology

The invention discloses a solar heat collection, energy storage and back heating system applied to a thermal generator set, and belongs to the field of energy conservation and emission reduction of the thermal generator set. The solar heat collection, energy storage and back heating system provided by the invention is connected with the conventional thermal generator set through a pipeline and a valve. The solar heat collection, energy storage and back heating system consists of a heat exchanger, an oil pump, a solar heat collection field, a heat accumulator and a heat exchanger which are connected in turn in a closed-loop mode; a heating working medium input end of the heat exchanger is connected with a center tap of a water supply pump of the thermal generator set; and a heating working medium input end of the heat exchanger is connected with a certain back heating steam extraction pipeline of the thermal generator set. The system can provide qualified heating steam for a certain back-heat heater through proper valve switching operation without changing a thermodynamic system structure of the conventional thermal generator set to stop using back heating extracted steam of a primary steam turbine so that the generating coal consumption of the thermal generator set is reduced and the purposes of energy conservation and emission reduction of the thermal generator set are fulfilled.

The invention discloses a control method and device of an engine, a storage medium and computer equipment. The ideal pressure ratio matched with the current rotating speed of the engine can be confirmed, and the ideal pressure ratio is the ratio of the back pressure and the front pressure of a throttle valve under the condition that the opening degree of the throttle valve is the maximum and throttle losses are the minimum; the front required pressure of the throttle valve is obtained according to the back actual pressure of the throttle valve at the current moment and the ideal pressure ratio; the target opening degree of a bypass valve is confirmed according to the difference value between the front actual pressure of the throttle valve at the current moment and the front required pressure of the throttle valve, wherein a gas inlet of the bypass valve communicates with a gas inlet of the throttle valve, and a gas outlet of the bypass valve communicates with the atmosphere; and the bypass valve is controlled to reach the target opening degree. The technical means of controlling the opening degree of the bypass valve is adopted, the technical problem that the throttle losses of the engine are increased is overcome, and then the technical effect of improving the heat efficiency of the engine is achieved.

The invention discloses a compressed air energy storage method. The compressed air energy storage method comprises the following steps that an underground aquifer serves as an air storage chamber of acompressed air energy storage system, and the development and application of the compressed air energy storage system are free from the limitation of geological conditions; the underground aquifer serves as the air storage chamber for storing compressed air, it is guaranteed that in the system energy releasing process, the pressure of the compressed air at an outlet of the air storage chamber isapproximately invariable, and the throttling loss caused by the throttling pressure reducing action of a throttling valve in a traditional compressed air energy storage system is avoided; compressionheat generated in the compression process is absorbed by a heat transferring medium from a heat network heat exchanger and is absorbed in a cooler, and the heated heat transferring medium is used forsupplying heat to heat consumers in a heat supply network; in the energy releasing process, a low-grade heat source is used for heating pre-stage inlet steam of an expansion machine, so that the powercapability of the compressed air can be greatly improved; and steam exhaust of a turbine unit enters a lithium bromide absorption refrigerating machine to serve as a high-temperature heat source of the refrigerating machine, and cooling capacity is supplied outside through the refrigerating machine.

The invention provides an electric static liquid acting system under a gravity load. The electric static liquid acting system comprises a servo motor connected to a two-way variable duplex pump; two oil inlets of the two-way variable duplex pump are connected with a first energy accumulator and a second energy accumulator correspondingly; the second energy accumulator is connected with a first pressure gauge, and is connected to a rod cavity of an asymmetric hydraulic cylinder; two oil outlets of the two-way variable duplex pump communicate with each other, and are connected with a second pressure gauge; the second pressure gauge is also connected with a rodless cavity of the asymmetric hydraulic cylinder; the upper end of the asymmetric hydraulic cylinder is connected with the gravity load; a linear motor is connected with a proportional adjusting device; and the proportional adjusting device is connected with the two-way variable duplex pump. The problem of asymmetric flows of two cavities of the asymmetric hydraulic cylinder in the electric static liquid system is solved; the linear motor and the proportional adjusting device are used for precisely and quickly adjusting the variable structure of the two-way variable duplex pump; and the electric static liquid acting system is simple in structure, meanwhile, prevents the throttling loss caused by introduction of a control valve into an electro-hydraulic servo variable adjusting mechanism, and further improves the energy efficiency.

The invention discloses a hydro-electric hybrid energy saving system for a lifting mechanism. The system is provided with an electric cylinder, an electric speed controller, a two-way DC/DC converter, a super-capacitor module and a pressure sensor; in combination with a corresponding control method, the gravitational potential energy of a movable arm is directly converted into electric energy for charging the super-capacitor module when the movable arm declines; and the super-capacitor module is used for providing the electric energy for a driving motor of an electric cylinder for auxiliary diving when the movable arm rises. The hydro-electric hybrid energy saving system for the lifting mechanism, disclosed by the invention, has the advantages of high storage and utilization efficiency of potential energy of the movable arm, stable output, low installed power, etc.

The invention discloses a gravitational potential energy recycling and reutilization energy-saving device based on a four-port hydraulic transformer. The device comprises an energy-saving device and aboom cylinder, the energy-saving device comprises the four-port hydraulic transformer, a two-way proportional throttle valve, a two-position three-way reversing valve, a normally-closed electromagnetic valve, an energy storage device and a controller, through the energy-saving device, hydraulic energy obtained through converting of gravitational potential energy in the excavator movable arm descending process is stored in the energy storage device, on the premise of not affecting the excavator operation and movable arm motion stability, energy stored in the energy storage device is released,through pressure transforming of the four-port hydraulic transformer, the energy is used for the excavator movable arm lifting condition, throttling losses generated when oil passes through a hydraulic valve in an original hydraulic system during movable arm descending can be avoided, and the efficiency of the hydraulic system is improved.

The invention relates to a hydraulic system, a hydraulic unit, a vehicle, a method and use. The hydraulic system for controlling or adjusting a hydraulic cylinder comprises at least one hydraulic cylinder; at least one hydraulic unit, by means of which the hydraulic cylinder can selectively be connected to a pressure source and a tank; and at least one controlling or adjusting device for controlling or adjusting the supply of hydraulic liquid to the hydraulic cylinder, the controlling or adjusting device forming a first assembly and the hydraulic unit forming a second assembly, and the first assembly and the second assembly are structurally separated from one another and are fluidically connected, wherein the supply of hydraulic liquid to the hydraulic cylinder is predominantly controlledor adjusted, from outside the hydraulic unit by means of the controlling or adjusting device, and the hydraulic unit is rigidly connected to the hydraulic cylinder.

The invention discloses an electro-hydraulic numerical-control synchronous bending machine hydraulic system controlled by double servo pumps. The electro-hydraulic numerical-control synchronous bending machine hydraulic system comprises a speed increasing cylinder, an oil return way, a first oil way, a second oil way and a third oil way. A liquid filling valve is arranged on the oil return way. One end of the oil return way is connected with the speed increasing cylinder, and the other end of the oil return way is connected with an oil tank. The first oil way is provided with a first reversingvalve. One end of the first oil way is connected with the speed increasing cylinder, and the other end of the first oil way is connected with the oil tank. One end of the second oil way is connectedwith the speed increasing cylinder, and the other end of the second oil way is connected with the first reversing valve. The second oil way is provided with a fast downflow valve, an overflow valve, aone-way valve and a back pressure valve. One end of the third oil way is connected with the first oil way and the second oil way, and the other end of the third oil way is connected with the oil tank. The third oil way is provided with a safety valve. A second reversing valve is arranged between the third oil way and the oil return way. A third reversing valve is arranged between the oil return way and the first oil way. By means of the electro-hydraulic numerical-control synchronous bending machine hydraulic system, the noise reduction effect is achieved; and due to the fact that the temperature of hydraulic oil is controllable, the hydraulic oil is long in service life, and thus the environmental protection effect is achieved.

The invention provides a soot blower steam source device utilizing low-temperature reheater access port steam. The device comprises low-temperature reheater inlet steam, low-temperature reheater outlet steam, an ejector and a steam soot blower air source, wherein the ejector is composed of a high-pressure nozzle, a low-pressure nozzle, a mixing chamber, a mixing chamber throat portion and a diffusion section, the low-temperature reheater inlet steam flows in from the high-pressure nozzle as working fluid, the low-temperature reheater outlet steam is introduced into the mixing chamber from the low-pressure nozzle as driving fluid, and after mixing and pressurization of the ejector, mixed steam sprayed out of a diffusion pipe finally serves as the steam soot blower air source. The structural dimension of the ejector can be optimized through parameter design of the low-temperature reheater inlet steam and the low-temperature reheater outlet steam, so that parameters of mixed steam meet the parameter requirement of the soot blower air source under various load conditions, the problem that high-quality steam is wasted when final-stage superheated steam serves as the soot blower air source is solved, and the economical efficiency of a unit is improved.

The invention discloses an electric metering pump for an aircraft engine. The electric metering pump comprises a power supply interface, a communication interface, a drive control unit, and a lubrication cooling pump, a motor and a main oil pump which are coaxially connected, wherein the drive control unit is connected with the power supply interface and the communication interface and is used for driving the motor to operate and controlling the rotating speed according to a control command; the motor is used for driving the lubrication cooling pump and the main oil pump to rotate; the main oil pump is used for pressurizing oil liquid which flows into the main oil pump; and the drive control unit is used for controlling the oil supply amount of the main oil pump by controlling the rotating speed of the motor. By the electric metering pump, the fuel oil increasing and metering functions of the aircraft engine is realized, the structure of an engine transmission accessory can be eliminated or greatly simplified, and the maximum section area and the weight of the engine can be reduced; in addition, fuel oil does not flow back to an inlet or an oil tank of the pump, so that a hydraulic oil channel is simplified, the energy loss of a system is reduced, the efficiency of the system is improved, and the additional temperature rise of the fuel oil is reduced or eliminated.

The invention discloses a low resistance loss quick-closing valve and a using method thereof. The low resistance loss quick-closing valve is provided with a valve body, a valve clack, a connecting rod, a sliding block, a driving mechanism and a valve rod, wherein an inlet and an outlet are formed in the valve body; the first end of the valve clack is hinged in the valve body; during the overturning process, the valve clack can open or close a passage between the inlet and the outlet; the first end of the connecting rod is hinged to the valve clack; the sliding block is hinged to the second endof the connecting rod; a guide rail is arranged in the valve body; the sliding block can slide in the guide rail; the driving mechanism can drive the sliding block to slide; the valve rod is connected with the sliding block; and the driving mechanism can drive the valve rod to move, so that a stop valve is prevented from throttling loss caused by small pore diameter of a valve seat and from flowresistance loss caused by flowing turning

The invention discloses an energy recovery system, further discloses a transmission system of a stepping mechanism, and the transmission system of the stepping mechanism comprises the energy recoverysystem. The energy recovery system comprises a hydraulic power unit, a frequency conversion driving unit and an energy recovery device, wherein the hydraulic power unit comprises a speed regulating motor and a hydraulic pump; the speed regulating motor is connected with the hydraulic pump; the frequency conversion driving unit is connected with the speed regulation motor; the energy recovery device is connected with the frequency conversion driving unit; and the frequency conversion driving unit controls the speed regulating motor to drive the hydraulic pump to operate, the volume speed regulating control is carried out on a hydraulic actuating element, and the hydraulic actuating element is driven to act, so that the load weight under different working conditions is automatically matched,the throttling loss is avoided, the energy-saving effect is achieved, and the control and the structure are simple. When the hydraulic actuating element descends or brakes, the hydraulic actuating element drives the speed regulating motor to be in a power generation state, potential energy and/or kinetic energy of the hydraulic actuating element is converted into electric energy, and the electricenergy is transmitted to the energy recovery device through the frequency conversion driving unit for reuse.

The invention relates to a plastic extruding and blowing wall thickness control device, in particular to an integrating device capable of controlling the wall thickness of a bottle blowing machine with a crank connecting rod mechanism driven by a motor. The integrating device comprises a machine frame, wherein a plurality of extruding mold heads for extruding bottle blowing molds are fixed to thebottom of the machine frame; an extruding mold head core rod is arranged in each extruding mold head in a cooperating manner; a servo motor and a crank connecting rod mechanical device are mounted atthe top of the machine frame; the servo motor is connected with a core rod moving mold plate through the crank connecting rod mechanical device, and is used for driving the core rod moving mold plateto move up and down; and the upper ends of the extruding mold head core rods are connected with and fixed to the core rod moving mold plate. The integrating device disclosed by the invention is simplein structure, high in precision of a control device, energy-saving and environmentally-friendly; the motion of the crank connecting rod mechanical device is combined with the motion of the servo motor, so that under the motion requirements of being short in stroke and heavy in load, the integral structure is stable and reliable, and the service life is greatly prolonged; and besides, the curve control is performed by a digital cam which is in servo driving, so that the precision of wall thickness of products is notably improved, and the production efficiency is improved.

The invention relates to a heavy vehicle electro-hydraulic servo steering system and a control method capable of suppressing overshoot. The heavy vehicle electro-hydraulic servo steering system comprises a hydraulic subsystem, a mechanical subsystem, a data acquisition subsystem and a controller. The data acquisition subsystem is used for acquiring the actual turning angle of a steering wheel and the pressure of each pressure sensor; the controller calculates and outputs control voltage of the servo driver according to the target rotating angle of the system, the actual rotating angle of the steering wheel and the pressure of each pressure sensor so as to control the hydraulic subsystem. According to the invention, corner closed-loop control of the system can be realized, and system overshoot can be reduced while high-dynamic tracking control of the system can be realized.