30results about How to "Solve the problem of low energy utilization" patented technology

The invention discloses a control method and device for the output power of a fuel cell. The control method for the output power of the fuel cell comprises the following steps of controlling the fuel cell to generate electricity in the first time according to the first power; and controlling the fuel cell to generate electricity in the second time according to the second power, wherein the starting moment of the second time is the ending moment of the first time. According to the method and the device, the problem that the energy using ratio of the fuel cell in the prior art is low is solved, further the working efficiency of the fuel cell is increased, and the service life of the fuel cell is prolonged.

The invention relates to a preparation method of a boron magnesium prealloy powder material, and belongs to the field of metal based combustible matter. The boron magnesium prealloy powder material isof a totally encapsulated type core-shell structure; B is taken as the core; the shell is composed of MgO and MgB2; amorphous form MgO and crystalline state MgB2 are nonuniformly distributed. The preparation method comprises following steps: magnesium powder and boron powder are subjected to pretreatment and mechanical premixing so as to obtain a mixed powder, the mixed powder is subjected to high temperature uniform pre-mixing, is taken out from a furnace, is smashed and grinded under the protection of an inert gas, and then is introduced into the furnace again; vacuuming is carried out, inert gas is introduced, and two-step sintering is carried out; an obtained prealloy powder block is subjected to mechanical smashing grinding under the protection of inert gas so as to obtain the boronmagnesium prealloy powder material. The preparation method is simple; cost is low; reduction of boron oxide in boron powder is realized with magnesium powder in heating process so as to increase the content of effective boron; a part of boron magnesium alloy is formed on interfaces among boron particles, so that boron agglomeration is reduced, heating area of boron particles in oxidation process is enlarged, and the degree of reaction is increased.

The invention discloses a uniformly-wound winding device for transformer production. The winding device comprises a base, wherein a sliding slot is arranged on the right side of the top of the base, asliding rail is respectively fixedly connected to the front surface and the back surface of the inner bottom of the sliding slot, the outer side of each sliding rail is sleeved with a sliding block,a support column is fixedly connected to the top of the sliding block, a positioning cylinder is fixedly connected to the middle of the left side of the support column, an upright column is fixedly connected to the right side of the top of the base, a horizontal axis is fixedly connected to the middle of the right side of the upright column, a cross beam is fixedly connected to the top of the right side of the upright column, and a transmission device is fixedly connected to the left side of the upright column. According to the scheme of the invention, through the coordinated use of a transmission shaft, a first gear, a turntable, a cross rod, a positioning rod and a sleeve ring, the problem that the winding of a conventional transformer winding device is not uniform enough can be solved;and through the coordinated use of a motor, a driving wheel, a transmission belt, a transmission wheel and a second gear, the problem that the conventional winding device is low in energy utilizationrate can be solved.

The invention provides a paper mill waste plastic treatment method which comprises the following steps: (1) dehydrating papermaking waste plastic to enable the water content of the material to be lower than 40 wt%; (2) drying the dehydrated material, wherein the water content of the dried material is lower than 10 wt%; (3) crushing the dried material to enable the particle size of the material tobe less than 50mm; (4) sending the crushed materials into a pyrolysis reactor for pyrolysis and cracking, and generating pyrolysis steam and pyrolysis carbon, wherein the temperature in the pyrolysisreactor is controlled to be 500-700 DEG C; and (5) performing spray cooling on the pyrolysis steam, obtaining a pyrolysis gas and oil-water mixture, and then feeding the oil-water mixture into an oil-water separator to be separated, wherein the spray cooling temperature ranges from 70 DEG C to 80 DEG C. The paper mill waste plastic treatment method can truly realize harmless and resourceful treatment of the waste plastics, and is an ultimate treatment means of organic wastes.

The invention discloses an electric automobile double-motor driving system and a power coupling comprehensive control method thereof. The electric automobile double-motor driving system is adopted, through a power coupling mode of a planetary gear mechanism, torque and rotational speed coupling under different working conditions of the electric automobile driving system is achieved, the double-motor driving system has a power-split type transmission regulating function capable of realizing continuous speed regulation and torque regulation, working states of electric automobile motors can be effectively adjusted, the motor efficiency is improved, according to the power coupling comprehensive control method, a working mode is matched under the condition that a demand rotating speed and torque are certain, an economy control strategy is established, rotating speeds and torque of the double motors are distributed, the double motors can work in a high energy efficiency state, and a comprehensive shifting control strategy of medium-low load economical shifting and medium-high load power shifting is realized.

The invention provides a sludge drying circulation structure and a sludge drying system; the sludge drying circulation structure comprises at least two stages of drying heating mechanisms; the first-stage drying heating mechanism introduces damp and hot air generated by drying sludge in a drying chamber, the damp and hot air passes through a first-stage heater, the heated gas is output by a fan topreheat and dry the sludge on an upper-layer crawler belt, and the used gas returns to the first-stage heater to form a circulation process. The second-stage drying heating mechanism make the damp and hot gas produced by sludge in the drying chamber filtered by an air filter and heat-exchanged by a total heat exchanger at the two sides, the filtered and cooled gas is dehumidified through a condenser, the produced dry gas is heated by a second-stage heater after being heated by the total heat exchanger, and the heated gas is output by the fan. The problems that in the low-temperature sludge drying process, the waste heat utilization rate is low, and energy consumption is large are solved.

The invention provides a direct type calcium hydroxide thermochemical energy storage system and method. The direct type calcium hydroxide thermochemical energy storage system comprises a solar heat collection device, a thermochemical energy storage device, a steam Rankine power generation device and an auxiliary device, the adopted thermochemical energy storage system is Ca (OH) 2 / CaO, and mutual conversion between high-grade heat energy and chemical energy is achieved through a reversible reaction CaO + H2O generate Ca (OH) 2 for heat storage; when solar irradiation is sufficient, Ca (OH) 2 reaches the reaction temperature through high-temperature water vapor generated by absorbing solar energy, an endothermic decomposition reaction is carried out, and the received heat is stored in CaO and H2O in the form of chemical energy; and when heat is needed, CaO and H2O are subjected to a reverse thermal chemical reaction, and chemical energy in CaO and H2O is reversed into heat energy and released. The system has the characteristics of high energy storage density, high reaction speed, high cycle efficiency, stability, safety, environmental friendliness, low raw material price and the like, and a feasible scheme is provided for ensuring continuous and efficient operation of a solar high-temperature thermal power station.

The invention belongs to the technical field of energy storage and utilization, and discloses an energy storage device and a peak load regulation method for peak load regulation in a power plant. Theenergy storage device for peak load regulation in the power plant comprises a heat exchanger, a first energy storage tank and a second energy storage tank, wherein the first energy storage tank and the second energy storage tank are correspondingly connected to two sides of the heat exchanger; the first energy storage tank, the heat exchanger and the second energy storage tank are connected sequentially to form a first closed-loop system; a phase-change material which flows in a circulating manner is arranged in the first closed-loop system; the temperature of the phase-change material is lowered sequentially in the direction of flowing through the first energy storage tank, the heat exchanger and the second energy storage tank; and when the phase-change material flows through the heat exchanger, the phase-change heat release is achieved, and the liquid state is changed to the solid state. According to the energy storage device disclosed by the invention, the phase-change material is utilized for the phase-change heat release when passing through the heat exchanger, so that a lot of heat can be absorbed by the heat exchanger, the energy utilization ratio of the energy storage device can be greatly improved, and then the problem about the low energy utilization ratio of the conventional molten salt energy storage process can be solved.

The invention provides a water electrolysis hydrogen production device which comprises a heat exchanger, and the heat exchanger comprises a first inlet, a first outlet and a second inlet; the water tank is used for containing electrolyte and is connected with the first inlet; the electrolytic bath is connected with the first outlet, so that the electrolyte in the water tank sequentially passes through the first inlet, the heat exchanger and the first outlet to enter the electrolytic bath; the rectifier is connected with the electrolytic bath to output direct current to the electrolytic bath, the rectifier comprises a water cooling part used for absorbing heat of the rectifier, and a water outlet of the water cooling part is connected with the second inlet to enable fluid in the water cooling part to enter the heat exchanger through the second inlet, so that the fluid in the water cooling part exchanges heat with electrolyte in the heat exchanger; the device for producing hydrogen by electrolyzing water solves the problem of low energy utilization rate of the device for producing hydrogen by electrolyzing water in the prior art.

The invention discloses a novel method for mechanical rock breaking based on tensile shear stress. A hydraulic power mechanism comprises a movable power vehicle (9) and a hydraulic oil tank (11), wherein the hydraulic oil tank (11) is assembled on the power vehicle (9), and a driving motor (10), a pressure gauge (12) and a controller (13) for controlling the hydraulic oil tank (11) to supply oil are arranged on the hydraulic oil tank (11); a drawing rock breaking mechanism comprises a hydraulic jack (1), a jacking vertical rod (2), a base plate (4), a cross beam (5), a drawing rod (6) and an anchoring rod (8); and one end of an oil feeding pipeline (14) and one end of an oil return pipeline (15) are respectively connected with an oil inlet and an oil return opening of the hydraulic jack (1), and the other end of the oil feeding pipeline (14) and the other end of the oil return pipeline (15) are respectively connected with an oil outlet valve and an oil return valve of the hydraulic oil tank (11). According to the novel method, the characteristics that rock masses are resistant to pressure and are not resistant to tensile shear are fully utilized, static environment-friendly mechanical rock breaking with only drilling but not blasting is realized, the rock masses are prevented from being excessively smashed, the high boulder rate is avoided, the requirement for rock lumpiness of an engineering project is met, the mechanical shoveling and transporting efficiency is improved, the shoveling operation cost is reduced, and the method can be widely applied to the fields of mines, tunnels, traffic roads, side slopes, foundation pit excavation and the like.

The invention discloses a solar system which comprises a photovoltaic assembly for receiving solar energy and converting the solar energy into electric energy, a mains supply connector for being connected with mains supply and a composite distribution invertion device respectively connected with the photovoltaic assembly and the mains supply connector and used for controlling the photovoltaic assembly and the mains supply to directly supply power to a load. By means of the solar system, the photovoltaic assembly of the solar system can directly supply power to the load instead of pre-storing the electrical power into a storage battery and enabling the storage battery to supply power to the load. Simultaneously when output power is smaller than load power, the mains supply is not totally switched for supplying power, but the mains supply and the photovoltaic assembly supply power together, and the effect of saving energy can be achieved.

The embodiment of the invention provides a gear control method of a power system in aboard operation. The power system comprises an engine, a transmission and a power takeoff which are in power coupling in sequence. The output of the power takeoff is used for driving a load. The method includes the steps of obtaining the torque requirement and the rotating speed requirement of the load, calculating the fuel oil consumption rate of the engine corresponding to each gear combination in a gear combination variation set of the transmission and the power takeoff on the basis of the torque requirement and the rotating speed requirement, and determining the gear combination with the lowest fuel oil consumption rate as the optimal gear combination. Meanwhile, the invention further discloses a gearcontrol device of the power system in aboard operation. By means of the method and the device, the problem of the low energy utilization rate of the engine is solved, meanwhile the fuel oil consumption rate of the engine in a hydraulic system is reduced, and the stability of aboard operation is improved.

The invention discloses a thermal insulation wall for building energy saving, and belongs to the technical field of wall structures. The thermal insulation wall comprises a plurality of plate bodies which are mutually clamped, every plate body comprises an outer wall, an inner wall and a thermal insulation plate positioned between the outer wall and the inner wall, a plurality of through honeycombgrooves penetrating toward one side of the thermal insulation plate is arranged in each of the outer wall and the inner wall, the area of the honeycomb grooves is 40-50% of the entire area of the plate, the honeycomb grooves of the inner wall and the honeycomb grooves of the outer wall are mutually staggered, the aperture s of the honeycomb grooves gradually become larger towards the thermal insulation plate, and every thermal insulation plate comprises a hollow layer and a straw waterproofing thermal insulation layer located outside the hollow layer. The thermal insulation wall for energysaving can save energy and reduce consumption and improve the energy utilization rate, and also can realize energy storage and thermal insulation.

The invention discloses a flat-plate integrated solar water heater, include a bracket and heat preservation buckets, a mounting plate is fixed on the upper end of the bracket, the upper end of that mounting plate is provided with a base, the heat preservation buckets are sequentially arranged at the upper end of the base, a light reflecting plate is fixed on the upper ends of the heat preservationbuckets, the upper end of the light reflecting plate is uniformly provided with a vacuum tube, the inner part of the bracket is provided with annular through holes, each two adjacent heat preservation buckets are connected with each other through a communication tube, both ends of the heat preservation bucket are provided with convex heads, and the light reflecting plate is connected with the vacuum tube through a groove arranged at the upper end. The bracket, the mounting plate, the base, the annular through holes, the light reflecting plate, the vacuum tube, the heat preservation buckets, the communication tube, a low fixing piece, a protective shell, a beam plate, an upper fixing piece and the groove are arranged to solve the problems of insufficient heat collecting effect, large occupying space and short service life of the solar water heater in use at the present stage.

The invention provides an air duct structure and an air conditioner indoor unit with the same. The air duct structure is used for guiding airflow, the air duct structure comprises a first air duct, wherein a first fan blade assembly is arranged in the first air duct, and the first fan blade assembly is provided with a first hub; the first air duct communicates with a second air duct, a second fanblade assembly is arranged in the second air duct, and the second fan blade assembly is provided with a second hub; the first hub and the second hub are both in a circular truncated cone shape, the first hub is provided with a first large-diameter end, the second hub is provided with a second large-diameter end, and the first large-diameter end and the second large-diameter end are oppositely arranged, so that the airflow is blown out from the second air duct after being sucked in from the first air duct, or the airflow is blown out from the first air duct after being sucked in from the secondair duct; and a flow guide assembly is arranged between the first air duct and the second air duct so that the airflow in the first air duct can be guided into the second air duct or the airflow in the second air duct can be guided into the first air duct, and the problem that an air conditioner in the prior art is low in airflow energy utilization rate is solved.

The invention relates to a preparation method of a boron magnesium prealloy powder material, and belongs to the field of metal based combustible matter. The boron magnesium prealloy powder material isof a totally encapsulated type core-shell structure; B is taken as the core; the shell is composed of MgO and MgB2; amorphous form MgO and crystalline state MgB2 are nonuniformly distributed. The preparation method comprises following steps: magnesium powder and boron powder are subjected to pretreatment and mechanical premixing so as to obtain a mixed powder, the mixed powder is subjected to high temperature uniform pre-mixing, is taken out from a furnace, is smashed and grinded under the protection of an inert gas, and then is introduced into the furnace again; vacuuming is carried out, inert gas is introduced, and two-step sintering is carried out; an obtained prealloy powder block is subjected to mechanical smashing grinding under the protection of inert gas so as to obtain the boronmagnesium prealloy powder material. The preparation method is simple; cost is low; reduction of boron oxide in boron powder is realized with magnesium powder in heating process so as to increase the content of effective boron; a part of boron magnesium alloy is formed on interfaces among boron particles, so that boron agglomeration is reduced, heating area of boron particles in oxidation process is enlarged, and the degree of reaction is increased.

The invention provides a direct calcium hydroxide thermochemical energy storage system and an energy storage method, including a solar heat collection device, a thermochemical energy storage device, a steam Rankine power generation device and an auxiliary device. The thermochemical energy storage system adopted is Ca (OH) 2 / CaO, through the reversible reaction CaO+H 2 O→Ca(OH) 2 Realize the mutual conversion between high-grade thermal energy and chemical energy for heat storage; when the solar radiation is sufficient, the high-temperature water vapor generated by absorbing solar energy makes Ca(OH) 2 When the reaction temperature is reached, an endothermic decomposition reaction occurs, and the received heat is stored in CaO and H in the form of chemical energy 2 O; when heat is required, CaO and H 2 O undergoes a reverse thermochemical reaction, combining CaO and H 2 The chemical energy in O is reversed into thermal energy and released. The invention has the characteristics of high energy storage density, fast reaction speed, high cycle efficiency, stability, safety, environmental friendliness, and low raw material price, and provides a feasible solution for ensuring continuous and efficient operation of solar high-temperature thermal power stations.

The invention provides a lean-burn internal combustion engine system and a vehicle with the lean-burn internal combustion engine system. The lean-burn internal combustion engine system comprises an internal combustion engine controller; the switched reluctance motor is electrically connected with the internal combustion engine controller; the gas compressor is connected with the switched reluctance motor; the turbine is connected with the switched reluctance motor, and the switched reluctance motor is located between the gas compressor and the turbine. The hydrogen-injection lean-burn engine is communicated with the gas compressor through the throttle valve, the turbine is communicated with an intake manifold of the hydrogen-injection lean-burn engine, and the hydrogen-injection lean-burn engine is electrically connected with the internal combustion engine controller. The internal combustion engine controller controls the switched reluctance motor to serve as a motor or a generator under different working conditions, when the switched reluctance motor serves as the motor, the electric auxiliary supercharging function is achieved, when the switched reluctance motor serves as the generator, the turbine power generation function is achieved, and the utilization rate of high-grade energy in tail gas is increased; the problem that a traditional exhaust gas turbocharger is low in energy utilization rate is solved.

The invention discloses a solar system which comprises a photovoltaic assembly for receiving solar energy and converting the solar energy into electric energy, a mains supply connector for being connected with mains supply and a composite distribution invertion device respectively connected with the photovoltaic assembly and the mains supply connector and used for controlling the photovoltaic assembly and the mains supply to directly supply power to a load. By means of the solar system, the photovoltaic assembly of the solar system can directly supply power to the load instead of pre-storing the electrical power into a storage battery and enabling the storage battery to supply power to the load. Simultaneously when output power is smaller than load power, the mains supply is not totally switched for supplying power, but the mains supply and the photovoltaic assembly supply power together, and the effect of saving energy can be achieved.

The present application provides a high-voltage system control method, device, electronic equipment, and storage medium, wherein, in the high-voltage system control method, when a power-on command is received, the voltage converter is controlled to supply power to target components. Then detect whether the voltage of the stack is greater than the voltage of the voltage converter. If it is detected that the voltage of the electric stack is greater than the voltage of the voltage converter, the voltage converter is stopped to supply power to the target component, and the electric stack is switched to supply power to the target component. When the power-off command is received, the target component is controlled to enter the shutdown mode, and the electric stack is controlled to enter the discharge mode. It is detected whether the difference between the voltage of the stack and the voltage of the voltage converter is smaller than a preset threshold. If it is detected that the difference between the voltage of the stack and the voltage of the voltage converter is less than a preset threshold, the target component is controlled to stop. When the stack discharge is completed, the voltage converter is controlled to shut down.

The invention discloses an energy recyclable auxiliary hub motor hydraulic driving system which comprises a controller, a power take-off device, a hydraulic pump, a hydraulic control valve set and two hydraulic motors arranged in two front wheel hubs. The energy recyclable auxiliary hub motor hydraulic driving system is characterized in that the system further comprises two energy accumulators and two solenoid valves. A closed loop is formed by the hydraulic pump and the two hydraulic motors through the hydraulic control valve set, and two energy accumulators are mounted on the oil inlet loop and the oil outlet loop of the two hydraulic motors respectively through the solenoid valves. The system can improve the driving force of a whole vehicle on bad condition roads, can further achieve energy recovery when the vehicle brakes, and improve the economical efficiency of the whole vehicle by closing the engine when the vehicle travels at low speed.

The invention discloses a protection method for emulsion explosive explosion welding. Two different metal plates are overlaid. An explosive layer is laid on a metal shroud plate. Explosive explodes toform a metal composite plate. An explosive face is covered with a protection object. The protection object comprises a protection layer of the emulsion explosive, and mineral powder on the protectionlayer. The protection layer is formed by a polyvinyl plastic film or corrugated paper or brown paper. The mineral powder comprises quartz sand or bentonite or sepiolite. Through the protection object, the explosion noise of the explosive is remarkably lowered, and explosive energy is completely utilized, so that the problem that explosive energy utilization rate of explosion welding is low is solved, and meanwhile, the problem of environment pollution in the explosion welding construction process is solved. Through the protection object, the explosive consumption can be reduced by 40-60%; andexplosion noise can be reduced by 50-70%.

The invention discloses a smoke exhaust structure for an anti-freezing gas engine and relates to the field of gas water heaters. The smoke exhaust structure comprises a smoke exhaust pipe and a fan which are mutually connected. A fixed plate with the size the same as the pipe diameter of the smoke exhaust pipe is arranged in the smoke exhaust pipe. The central axis of the fixed plate coincides with the central axis of the smoke exhaust pipe. A fixed magnetic plate is embedded into the center position of the fixed plate. Multiple fixed smoke outlet holes are annularly formed in the position, close to the edge position, of the fixed plate. A non-elastic connecting bag connected to the inner wall of the smoke exhaust pipe in a sealed manner is arranged on the outer side of the fixed plate. A movable magnetic plate which is parallel to the fixed plate and coaxial with the fixed plate is arranged on the non-elastic connecting bag. A movable smoke outlet hole is formed in the center position of the movable magnetic plate. According to the working principle, by arranging a gas reverse flow prevention structure, the situation that cold air enters the gas engine through the smoke exhaust pipe and freezes and damages a water pipe is prevented, the gas engine structure is not changed, only a smoke exhaust structure is replaced, the improvement cost is low, the energy utilization rate of the gas engine is high, and the problem that the energy utilization rate of an existing anti-freezing gas engine is low is solved.

The invention provides a sludge drying structure which comprises a drying area and a heating area, hot air output by the heating area enters the drying area, and air in the drying area flows into theheating area through an air passing plate; and an included angle is formed between the gas outflow direction of the drying area and an air passing bent part of the air passing plate. According to thedesign position and the design angle of the air passing plate, the problem that circulating gas generates vortexes is fully considered, and vortexes generated in the gas circulation process are reduced to the maximum extent.

The invention belongs to the field of metal-based combustibles, and relates to a spherical high-activity boron-based pre-alloyed powder and a preparation method thereof. It mainly solves the problems such as low chemical purity, poor appearance and incomplete reaction of the existing boron powder in the energetic material system, and reduces the energy output value of the boron-containing energetic material system. The invention uses high-purity boron powder and low-melting-point active metals as raw materials, adopts the method of anaerobic, closed-loop, and program-controlled temperature pre-pressing sintering to prepare boron-based pre-alloyed powders, and uses a high-energy ball mill to spherically shape the pre-alloyed powder samples. Through chemical preparation, spherical high-activity boron-based pre-alloy powders with a particle size of submicron to tens of microns can be obtained. Adding spherical high-activity boron-based pre-alloyed powder to the energetic material system can improve the preparation process of the energetic material system, increase the energy release rate of active boron, improve the ignition performance, and increase the combustion efficiency. The development of high-energy insensitization is of great significance.

The invention provides an active and passive energy storage combined driver which has broad application. For example, the active and passive energy storage combined driver can be used for jumping robots, wheeled mobile robots and the like. The active and passive energy storage combined driver comprises a motor mounting frame, a servo motor is fixedly mounted on the motor mounting frame, a ball screw rod is connected with an output shaft of the servo motor, a ball nut matched with the ball screw, and flange move along a guiding device, and an energy storage spring is fixed below the ball nut, the energy storage spring is mounted on the ball screw rod in a sleeved mode, a chassis is fixed to the lower end of the spring, and a clutch is further arranged between the lower end of the ball screw rod and the upper end of the chassis. The active and passive energy storage mechanism combined driver can effectively improve the utilization rate of energy.

The invention discloses a control method and device for the output power of a fuel cell. The control method for the output power of the fuel cell comprises the following steps of controlling the fuel cell to generate electricity in the first time according to the first power; and controlling the fuel cell to generate electricity in the second time according to the second power, wherein the starting moment of the second time is the ending moment of the first time. According to the method and the device, the problem that the energy using ratio of the fuel cell in the prior art is low is solved, further the working efficiency of the fuel cell is increased, and the service life of the fuel cell is prolonged.

The invention provides an air duct structure and an air conditioner indoor unit with the same. The air duct structure is used for guiding airflow and comprises a first air duct, a second air duct anda flow guide assembly, wherein a first fan blade assembly is arranged in the first air duct, the first air duct communicates with the second air duct, and a second fan blade assembly is arranged in the second air duct, so that when the first fan blade assembly and the second fan blade assembly rotate around a preset axis in the same direction, airflow is sucked into the first air duct and then blown out of the second air duct, or the airflow is sucked into the second air duct and then blown out of the first air duct, the flow guide assembly is arranged between the first air duct and the secondair duct so as to guide the airflow in the first air duct into the second air duct or guide the airflow in the second air duct into the first air duct, and the problem that in the prior art, an air conditioner is low in airflow energy utilization rate is solved.

The invention provides a crane and its hydraulic control system. The hydraulic control system includes a main valve and a main hoist hydraulic system connected to the main valve. The main hoist hydraulic system includes a hoist motor. The hydraulic control system also includes: energy Storage device, the energy storage device is connected with the working oil port on the descending side of the winch motor to store the pressure oil flowing out from the winch motor during the lowering of the winch. The hydraulic control system in the present invention solves the problem of low energy utilization in the cranes in the prior art.

Embodiments of the present invention provide a gear position control method for a power system during boarding operations. The power system includes an engine, a transmission, and a power take-off that are sequentially power-coupled, and the output of the power take-off is used to drive a load. The method includes: obtaining the torque demand and rotational speed demand of the load; and calculating the engine power corresponding to each gear combination in the gear combination change set of the transmission and the power take-off based on the torque demand and the rotational speed demand. Fuel consumption rate; determine the gear combination with the lowest fuel consumption rate as the best gear combination. At the same time, it also discloses a gear position control device of the power system in the boarding operation. The embodiment of the present invention solves the problem of low energy utilization rate of the engine, reduces the fuel consumption rate of the engine in the hydraulic system, and improves the stability of the boarding operation.