201 results about "Hydraulic control unit" patented technology

The technical scheme of the invention relates to the technical field of control and adjustment, in particular to a crawler-type articulated vehicle braking system applied to a low-temperature environment. Through multi-module collaborative optimization and a closed-loop control mechanism, the problems of unbalanced dynamic distribution of braking force, insufficient redundancy fault tolerance and signal distortion under the low-temperature working condition are solved. The data acquisition module is used for acquiring a hinging angle, an inertial measurement unit attitude, a braking temperature and a vehicle state signal in real time; the optimization control module performs multi-objective optimization on the dynamic weight coefficient, the redundancy switching threshold value and the fuzzy rule parameter based on a genetic algorithm to generate a weight distribution scheme of a hinge angle compensation mode and an inertial measurement unit dominant mode; the adjusting module generates a brake pressure reference value through temperature self-adaptive analysis and synchronizes hydraulic control units of a front vehicle and a rear vehicle, and all the modules remarkably improve the dynamic stability and the low-temperature working condition fault-tolerant capability of a brake system through full-link cooperation of environment perception, parameter iteration and redundancy execution.

The invention relates to the technical field of engineering machinery, and particularly discloses an electrically-driven metering pump load-sensitive system, a control method and engineering machinery, the electrically-driven metering pump load-sensitive system comprises a control unit, a driving motor assembly, a metering pump, a pilot hydraulic control unit, a pilot handle assembly, a load-sensitive valve assembly, an actuator assembly, a sensor assembly and a pressure difference control module; the driving motor drives the metering pump to supply oil to the load-sensitive valve assembly so as to drive the actuator assembly to operate; the control unit receives the maximum outlet pressure and the maximum load pressure of the pump collected by the pressure sensor, receives a system target pressure difference signal of the pressure difference control module at the same time, and synchronously controls the rotating speed of the motor and the valve target pressure difference output by the proportional pressure reducing valve. The system aims to solve the problems that a traditional upstream compensation load sensitive system lacks a flow saturation resisting function, and a downstream compensation load sensitive system has extra reversing energy consumption and fixed system pressure difference setting.

The present invention obtains a hydraulic pressure control unit capable of accurately evaluating viscosity of a hydraulic fluid.The hydraulic pressure control unit according to the present invention includes a controller including an evaluation section that evaluates the viscosity of the hydraulic fluid. The evaluation section evaluates the viscosity on the basis of a reduced amount of a current value of a current flowing through a wire (314) at a time when the current value is temporarily reduced in a process in which the current value is increased toward a target current value at beginning of application of the current to the wire (314) of an electromagnetic valve (31).

The invention provides a variable rotating speed-variable displacement differential pressure controllable valve front compensation load sensitive system. The variable rotating speed-variable displacement differential pressure controllable valve front compensation load sensitive system comprises a control unit, a driving motor assembly, a variable differential pressure load sensitive pump assembly, a variable differential pressure load sensitive valve assembly, a pilot hydraulic control unit, a pilot handle assembly, an actuator assembly, a sensor assembly and a motor rotating speed control module. The driving motor assembly drives the variable pressure difference load sensitive pump assembly to supply oil to the variable pressure difference load sensitive valve assembly, and then the actuator assembly is driven to operate. The pilot hydraulic control unit provides set pressure; the pilot handle assembly outputs a signal to the variable pressure difference load sensitive valve assembly; the sensor assembly detects the maximum load pressure of the system and the outlet pressure of the variable pressure difference load sensitive pump assembly; the control unit controls the target rotating speed of the driving motor assembly and the control pressure of the pilot hydraulic control unit. Compared with an existing upstream compensation load sensitive system, the problem of speed imbalance of an actuator under the flow saturation working condition is effectively avoided, and the control performance is remarkably improved.

An additive manufactured (AM) hydraulic control assembly includes a first AM hydraulic passage having a first tubular wall defining a first fluid passage, a second AM hydraulic passage integrally formed with the first AM hydraulic passage and having a second tubular wall defining a second fluid passage, and an AM wall integrally formed with the first and second AM hydraulic passages and fluidly separating the first and second fluid passages. At least one of (i) a hydraulic control orifice is formed in the AM wall and configured to regulate fluid flow and pressure between the first and second fluid passages, and (ii) a ball seat is formed in the AM wall and a check ball is disposed in one of the first and second fluid passages and configured to selectively seal against the ball seat to facilitate preventing fluid flow therethrough.

The application provides a normally open large-flow switching electromagnetic valve and a hydraulic control unit of an automobile brake system. The electromagnetic valve comprises an electromagnetic coil, a valve shell, a moving iron, a valve core, a small-flow valve seat and a large-flow valve seat. An accommodating space is formed in the valve shell. The valve core, the small-flow valve seat and the large-flow valve seat are sequentially arranged in the accommodating space from top to bottom. The valve core is connected with the moving iron, and the electromagnetic coil is arranged around the moving iron and the valve shell. A first elastic member is arranged between the valve core and the small-flow valve seat. The small-flow valve seat and the large-flow valve seat are connected through a second elastic member. When the electromagnetic coil is powered off, the valve core opens a small-flow port, and the small-flow valve seat opens a large-flow port, so that the electromagnetic valve is opened with large flow. When the electromagnetic coil is powered on, the valve core closes the small-flow port, and the small-flow valve seat closes the large-flow port, so that the electromagnetic valve is closed. The application can satisfy the normally open and large-flow capacity of the electromagnetic valve, so as to realize rapid pressure regulation.

The invention discloses a posture-adjustable shield tunneling simulation device for a sandy soil stratum. The posture-adjustable shield tunneling simulation device comprises a soil box, a shield tunneling machine model, a pedestal and a monitoring system, the shield tunneling machine model comprises a shield body, a cutterhead, a transmission system, a propelling system and a dumping system. The soil box is filled with a test soil body; the shield body is slidably installed on a sliding rail on the top of the pedestal and faces the opening side of the soil box. The cutterhead is rotationally arranged at the front end of the shield body, and the aperture ratio is adjustable. A transmission shaft in the transmission system is driven by the first driving piece to drive the cutter head to rotate. The propelling system is arranged at the rear end of the shield body and comprises a power module and a posture adjusting module. The power module drives the shield body to axially advance; in the posture adjusting module, a hydraulic control unit controls a plurality of sets of posture adjusting oil cylinders abutting against the rear end of the shield body to generate differentiated expansion and contraction amounts so as to adjust the tunneling angle. The soil discharging system is used for discharging muck in the shield body, and the monitoring system is used for monitoring test data during tunneling simulation. The invention further discloses a shield tunneling simulation method based on the simulation device.

The utility model discloses an automatic charging and discharging system of an intelligent filling scraper machine, which comprises a filling paste preparation system, an automatic charging and discharging system and a control system, wherein the filling paste preparation system is used for emulsifying filled materials to enable the materials to become paste substances with flowability and transportability; the discharging control system is electrically connected with a control unit of the scraper, is used for realizing automatic filling and discharging of the pasty substance by controlling start, stop, stretching and retraction of a scraper on the scraper, is electrically or wirelessly connected with external main control equipment and remote control equipment, and is used for controlling the discharging control system to realize remote control of the pasty substance; the hydraulic control unit is electrically connected with the unloading control system and is used for controlling and monitoring the filling scraper by controlling the lifting and inclination angles of the hydraulic bracket; and meanwhile, starting, stopping, stretching and retracting of the scraper conveyor are controlled through the discharging control unit, and charging and discharging of the materials can be achieved.

The utility model discloses a positioning device and a clamp for a vehicle hydraulic control unit. The first positioning mechanism is arranged on the base and is provided with a first positioning part; the second positioning mechanism is in sliding connection with the base in the direction close to and away from the first positioning part, and the second positioning mechanism is provided with a second positioning part; and the adjusting mechanism is arranged on the second positioning mechanism, the adjusting mechanism is provided with an adjusting head capable of stretching out and retracting, and when stretching out, the adjusting head abuts against the first positioning mechanism to adjust the distance between the first positioning part and the second positioning part. The second positioning mechanism is in sliding connection with the base, so that the distance between the second positioning part and the first positioning part can be adjusted. By arranging the adjusting mechanism, the adjusting mechanism extends out of the adjusting head to abut against the first positioning mechanism, and therefore the distance between the first positioning part and the second positioning part can be positioned. Therefore, the time for adjusting the equipment during model replacement can be shortened, and the production efficiency is improved.

The invention relates to the technical field of water turbine generator set installation and maintenance, and discloses an intelligent water turbine runner test device and method, and the device comprises a hydraulic control unit which is used for providing and adjusting pressure oil for a constant-pressure cavity, an opening cavity and a closing cavity of a water turbine runner; and the main controller is used for receiving a user instruction, calling an automatic control logic according to a selected test item, driving the hydraulic control unit to execute a corresponding oil path action, and receiving and processing the cavity pressure of the runner hub, the servomotor stroke and the blade rotation angle parameter which are acquired in real time so as to automatically complete the runner test item specified by the national standard. The test process is automatically executed through the main controller, and frequent manual operation is replaced by simple clicking, so that the labor intensity of operators is greatly reduced.

The invention discloses an asymmetric actuator electro-hydraulic control system and method. The asymmetric actuator electro-hydraulic control system comprises an energy supply and storage unit, a hydraulic control unit, a control unit and an asymmetric actuator. The energy supply and storage unit comprises a power battery unit, a high-voltage distributor, a motor controller and a motor generator which are electrically connected in sequence; the hydraulic control unit comprises a main pump motor, a volume compensation pump motor, an electro-hydraulic directional control valve, a holding valve, an oil tank and an energy accumulator, a port A1 of the main pump motor is connected with an oil inlet of the holding valve, an oil outlet of the holding valve is communicated with a port M of a rodless cavity of the asymmetric actuator, and a port B1 of the main pump motor is communicated with a port N of a rod cavity of the asymmetric actuator. The problem of system oscillation caused by the flow difference of the two cavities of the asymmetric actuator is effectively solved. The energy recovery unit can recover potential energy, and the endurance time of equipment is remarkably prolonged. The automatic switching function of the electro-hydraulic reversing valve effectively reduces the response time of the system so as to meet the high-frequency action requirement of engineering machinery.

The invention discloses a drive-by-wire hydraulic steering system and method based on linear active disturbance rejection, and belongs to the technical field of automobile steering, the steering system comprises a hydraulic control unit and a control module, the hydraulic control unit is used for controlling the movement direction and the movement speed of a steering oil cylinder by controlling the flowing direction and the flowing speed of hydraulic oil; and the control module is used for calculating the received input turning angle and the actual turning angle according to a linear active-disturbance-rejection steering angle control algorithm, controlling the steering of a steering control valve in the hydraulic control unit, and indirectly controlling the steering angle and the motion trail of the vehicle through the steering of the steering control valve. By means of the steering system and method, the problems of non-linear interference such as uncertainty of tire aligning torque influence factors and electromagnetic coupling of a steering execution motor can be effectively solved, high-precision steering angle tracking control is achieved, the steering precision and the response speed of a vehicle are remarkably improved, and the maneuverability and the sense of safety of a driver are improved.

The invention discloses a pipe lifting device which integrates two functions of storage and lifting and comprises a storage mechanism, a distribution mechanism, a lifting mechanism, a bearing foundation, power driving devices, a hydraulic control unit and an electric control system, and the lifting mechanism is driven to move up and down through the power driving devices arranged on the two sides and is matched with a platform crane to lift a drill rod. And the distribution mechanism moves to realize mutual transfer of the pipes from the drill rod storage yard to the storage mechanism, from the low position to the high position and from the ground to the power catwalk main workshop. According to the pipe lifting device, a joint crane can be omitted, the space limitation of a platform is reduced, and in addition, the pipe lifting device has the advantages of being high in working efficiency, safe and reliable in operation and the like.

The application relates to a kind of injection molding equipment of hybrid insulator, including injection unit, mould unit, electric control unit, temperature control unit, hydraulic control unit, rack and safety protection unit, injection unit includes feeding mechanism, plasticizing mechanism and injection mechanism, feeding mechanism is used to receive high-temperature vulcanized solid silicone rubber and output after high-temperature vulcanized solid silicone rubber is compacted and exhausted, plasticizing mechanism is used to receive high-temperature vulcanized solid silicone rubber sent by feeding mechanism and output after high-temperature vulcanized solid silicone rubber is once plasticized, injection mechanism is used to receive high-temperature vulcanized solid silicone rubber sent by plasticizing mechanism and output after high-temperature vulcanized solid silicone rubber is twice plasticized.The application is more compact by setting two-stage plasticizing, and high-temperature vulcanized solid silicone rubber is injected into mould in better flowability, and the performance of the covering layer of the finally formed hybrid insulator is more excellent, and the product quality of hybrid insulator is improved.

To provide a hydraulic control unit for a saddle-riding type vehicle, which includes a pump for moving a brake fluid and a holder for holding a filter through which the brake fluid passes in the pump, can be miniaturized, and can prevent the holder from not being provided in a prescribed posture.SOLUTION: The hydraulic pressure control unit includes a base body in which an internal flow path that allows a wheel cylinder and a master cylinder to communicate with each other is formed, and a pump that moves a brake fluid in the internal flow path, wherein the base body includes a recessed portion in which the pump is provided, the pump includes a cylinder in which a compression chamber that compresses the brake fluid is formed, a piston portion whose input-side end portion is pressed by a motor and whose partition-side end portion is inserted into the compression chamber to partition the compression chamber, and a holder that holds a filter through which the brake fluid flowing into the inflow flow path passes, and the holder includes an abutting portion whose base end portion is connected to the cylinder and that abuts on a wall surface of the recessed portion.SELECTED DRAWING: Figure 3

Disclosed are an electronic brake system and an operating method thereof. The electronic brake system according to the present embodiment comprises: a reservoir having a pressurization medium stored therein; an integrated master cylinder having a master piston, a master chamber of which the volume varies according to the displacement of the master piston, and a sealing member sealing the master chamber; a simulator valve that controls the flow of the pressurization medium between the reservoir and the master chamber; a hydraulic supply device that operates a hydraulic piston on the basis of an electrical signal output in response to a displacement of the brake pedal and generates hydraulic pressure; and a hydraulic control unit provided between the hydraulic supply device and a plurality of wheel cylinders, wherein whether a component element including the integrated master cylinder leaks may be determined on the basis of an inspection flow path connected to the master chamber and an inspection valve provided in the inspection flow path.

The utility model discloses an electric-drive hydraulic-control grease injection system for bridge-shot combined operation, which belongs to the technical field of oil-gas field development and comprises an electric control unit, and an electric-drive high-pressure grease injection unit, an electric-drive hydraulic control unit and a quick pressure test unit which are respectively connected with the software program electric control unit, the electric drive high-pressure grease injection unit is connected with the sealing grease box and used for pumping sealing grease out of the sealing grease box and feeding the sealing grease into the grease injection sealing head or the multi-wellhead blowout preventer. The electric drive hydraulic control unit is connected with the oil tank; the rapid pressure test unit is connected with the oil tank and is used for pressurizing the hydraulic oil and outputting the hydraulic oil to the multi-wellhead rapid pressure test nipple; the electric drive high-pressure grease injection unit, the electric drive hydraulic control unit and the rapid pressure test unit are arranged, the three units share one electric control unit, one grease injection system is integrated, high integration of one-dragging-three and one-dragging-two bridge shooting operation multiple systems is achieved, centralized control can be conducted, and therefore control with higher intelligence is achieved.

The present invention achieves a hydraulic pressure control unit for a saddle-riding type vehicle, the hydraulic pressure control unit being capable of further reducing the possibility of decreases in sealing performance between a base and a housing compared to prior art. A hydraulic pressure control unit according to the present invention comprises: a base in which an internal flow path is formed; a housing that accommodates a control substrate and is sealed using an adhesive between the base and the housing; a plurality of holes provided in one of the base and the housing; a plurality of pins provided to the other of the base and the housing and inserted into the holes to position the base and the housing; and a bolt that fixes the base and the housing. When at least one of the plurality of holes is defined as a selected hole and a pin, from among the plurality of pins, inserted into the selected hole is defined as a selected pin, the selected pin is press-fitted into the selected hole.

The application belongs to the technical field of hydraulic control systems of injection molding machines, and provides a hydraulic control unit, a servo control mold locking hydraulic system and an injection molding machine. The control unit comprises a high-frequency response servo valve, a one-way poppet valve, a two-way poppet valve and a controller. One end of the two-way poppet valve is connected to the rod cavity of a mold locking oil cylinder, and the other end is connected to a system oil tank. The controller is electrically connected to the high-frequency response servo valve, and is signal connected to a pressure sensor and a displacement sensor respectively. Compared with the prior art, the application integrates a high-frequency response servo valve, a one-way poppet valve, a two-way poppet valve and a closed-loop sensor controller to construct a high-precision hydraulic control unit, significantly improves the position repeatability and dynamic response speed of micro-opening actions, effectively meets the demand of advanced processes such as foaming injection molding and thin-wall molding for dynamic pressure adjustment of a mold cavity, and avoids problems such as uneven density of products, flash or mold damage.

The invention discloses a hydraulic braking system of a monorail vehicle, which relates to the technical field of vehicle braking, and comprises an electronic braking control unit used for controlling hydraulic braking force and receiving a vehicle braking instruction through network communication; the hydraulic control unit is used for controlling the oil pressure of the hydraulic system under different brake working conditions; the electric control relieving unit is used for providing oil pressure needed for relieving braking of the hydraulic braking clamp when the hydraulic control unit breaks down; the manual relieving unit is used for providing oil pressure required for relieving the braking of the hydraulic braking clamp when the vehicle has no electricity or both the hydraulic control unit and the electric control relieving unit have faults; the basic braking device is used for braking the rotary motion of the motor shaft; the load sensor is used for collecting vehicle load information; and the electric control box is used for feeding back the emergency braking and parking braking states of the vehicle to the electronic braking control unit. The hydraulic braking system of the monorail vehicle is complete in function, intelligent, safe and reliable.

Provided are: a hydraulic control unit that can meet a need for miniaturization and a method for manufacturing such a hydraulic control unit. This hydraulic control unit is for a brake system mounted on a straddle-riding type vehicle, the hydraulic control unit comprising a base in which a brake fluid flow path is formed, a circuit board that controls the driving of a hydraulic regulating valve that opens and closes the flow path, a housing that accommodates the circuit board, and a connecting unit that connects the base and the housing, wherein: the connecting unit comprises a recessed section formed in the base, and a pin held by the housing and having an end press-fitted to the recessed section; a through-hole is formed in the end press-fitted to the recessed part; the outer edge of the through-hole is defined by a first branch section and a second branch section, both ends of which are connected to each other, in the end press-fitted into the recessed section; and a reinforcing member different from the base and the pin abuts and presses at least one among the first branch section and the second branch section.

The present invention obtains a hydraulic control unit for a straddle-type vehicle, the hydraulic control unit which can be mounted in a space where the mounting of a conventional hydraulic control unit would be difficult. This hydraulic control unit is for a brake system mounted in a straddle-type vehicle, the unit comprising: a base body in which a flow path for a brake fluid is formed; a motor that is the driving source of a pump that applies pressure to the brake fluid; a fill valve that opens / closes the flow path; and a release valve that opens / closes the flow path, wherein the fill valve and the release valve are provided to a first side surface that is one side surface of the base body, and the motor is provided to a second side surface that is different from the first side surface and is one of two side surfaces of the base plate which face each other in the alignment direction of the fill valve and the release valve.

A fluid pressure control unit comprises a base body in which an internal flow channel is formed through which brake fluid flows, a motor which is a drive source of a pump which is provided in the internal flow channel, and a housing which is connected to the base body and covers the motor, wherein the motor has a main body section comprising a stator and a rotor, and an output shaft attached to the rotor, wherein the stator has two magnet sections, and if, when viewed from a direction of view along a center of rotation of the output shaft, a direction along an imaginary straight line passing through the centers of the two magnet sections is defined as the first direction and a direction perpendicular to the first direction is defined as the second direction, the length of the main body section in the second direction is shorter than that in the first direction.

The invention relates to the field of well control equipment detection, in particular to a multi-station well control equipment pressure test monitoring device and a monitoring method thereof. The two pairs of mounting frames are fixed to the upper surface of the bottom frame at equal intervals, and connecting holes are formed in the tops of the mounting frames; the two pairs of mounting frames are detachably connected with the hydraulic control unit through connecting holes respectively, and the hydraulic control unit is provided with a medium outlet and a first liquid outlet; one end of the main pipe is detachably connected with a medium inlet; the two pairs of flow dividing connecting pieces are detachably communicated with the front side and the rear side of the main pipe respectively, and each flow dividing connecting piece is detachably communicated with one hydraulic control unit. According to the invention, pressure test can be carried out on a plurality of pressure test devices at the same time, and pressure test can be carried out on a single pressure test device independently, so that the detection efficiency is improved, and the problem of instability caused by too many connection times of pressure test devices is reduced.

This invention discloses an electronic braking system. The electronic braking system according to this embodiment may include: a reservoir storing a pressurized medium; an integrated master cylinder having a master piston connected to the brake pedal, a main chamber whose volume changes according to the displacement of the master piston, and a sealing component sealing the main chamber; a hydraulic supply device that operates a hydraulic piston to generate hydraulic pressure according to an electrical signal output corresponding to the displacement of the brake pedal; a hydraulic control unit disposed between the hydraulic supply device and a plurality of wheel cylinders, and controlling the flow of the pressurized medium supplied to the plurality of wheel cylinders; a loop pressure sensor that senses the hydraulic pressure supplied through the hydraulic supply device; a cylinder pressure sensor that senses the hydraulic pressure in the main chamber; a check flow path connecting the main chamber and the hydraulic supply device; and a check valve disposed in the check flow path to control the flow of the pressurized medium.

The invention discloses a system and a method for testing the cyclic expansion performance of a solid-state battery, which can realize more accurate battery expansion detection. The test system comprises an oil storage tank, a static pressure container, a hydraulic control unit, a charging and discharging instrument and a main controller. The oil storage tank is used for storing hydraulic oil; the static pressure container comprises a closed container shell, a battery detection probe arranged on the container shell, and a first pressure gauge; the container shell is used for accommodating a battery to be detected and is provided with a first inlet and a first outlet of which the opening and closing states can be controlled; the inner side end of the battery detection probe is electrically connected with a tab of a battery to be detected; the first pressure gauge is used for detecting the pressure of liquid in the container shell; the hydraulic control unit is arranged between the oil storage tank and the static pressure container and used for achieving flowing of hydraulic oil between the oil storage tank and the first inlet and the first outlet of the static pressure container. The charging and discharging instrument is electrically connected with the outer side end of the battery detection probe; and the main controller is electrically connected with the hydraulic control unit and the charging and discharging instrument.

The utility model discloses a kind of off-highway dump truck auxiliary braking systems, belong to off-highway dump truck braking technical field, including the hydraulic clamp disc type auxiliary brake of being installed in middle axle and rear axle transmission shaft, and the hydraulic control unit consisting of hydraulic power unit, auxiliary brake valve, energy accumulator and connecting pipeline;Hydraulic power unit connects steering hydraulic oil tank and auxiliary brake valve, and energy accumulator supplies high-pressure oil to auxiliary brake valve to auxiliary brake to release brake.The system is mainly used to improve off-highway dump truck parking brake safety and braking force, applicable to the vehicle of design load 90 tons below, provide redundancy brake guarantee for off-highway dump truck, realize quick response auxiliary brake when main brake fails.

The invention belongs to the technical field of injection molding machine hydraulic control systems, and provides a hydraulic control unit, a servo control mold locking hydraulic system and an injection molding machine, the control unit comprises a high-frequency response servo valve, a one-way poppet valve, a two-way poppet valve and a controller; one end of the two-way poppet valve is connected with a rod cavity of the mold locking oil cylinder, and the other end is connected with the system oil tank; the controller is electrically connected with the high-frequency response servo valve and is in signal connection with the pressure sensor and the displacement sensor. Compared with the prior art, the high-precision hydraulic control unit is constructed by integrating the high-frequency response servo valve, the one-way poppet valve, the two-way poppet valve and the closed-loop sensing controller, so that the position repetition precision and the dynamic response speed of micro-opening action are remarkably improved; the requirements of advanced technologies such as foaming injection molding and thin-wall forming on dynamic adjustment of the pressure of the cavity are effectively met, and the problems of uneven density, flash or mold damage of products are avoided.

The utility model discloses a hydraulic lifting system, and relates to the technical field of hydraulic pressure, the hydraulic lifting system is used for lifting an object on a lifting table, the lifting table is provided with a lifting working face, and the hydraulic lifting system comprises a hydraulic cylinder, a hydraulic control unit and a hydraulic auxiliary unit; wherein the multiple hydraulic cylinders are arranged at intervals, and the hydraulic cylinders are fixedly arranged on the side, away from the lifting working face, of the lifting table; the hydraulic control unit is fixedly arranged on the side, away from the lifting table, of the hydraulic cylinder, the hydraulic control unit comprises a plurality of proportional control valves, and the proportional control valves are connected with the hydraulic cylinder; the hydraulic auxiliary unit comprises an energy accumulator and a safety valve set, the safety valve set is installed in the energy accumulator, and the energy accumulator is connected with the hydraulic control unit. According to the technical scheme, the problem that a plurality of hydraulic cylinders in an existing hydraulic system are not synchronous in lifting is solved.

The invention provides a disc wheel clutch and dual-motor hybrid power transmission transmission system. The disc wheel clutch and dual-motor hybrid power transmission transmission system comprises a hybrid power transmission and a plurality of disc wheel clutches, a first output shaft, a first input shaft, a second output shaft, a second input shaft and an intermediate shaft, the system further comprises a first motor, a battery, a power control unit, a second motor, an engine and an oil pressure control unit. The engine and the first input shaft are coaxially arranged, the first motor and the first input shaft are coaxially arranged, and the second motor and the second input shaft are coaxially arranged; in the hybrid power mode, engine power is distributed to the transmission shaft and the first motor through the hybrid power transmission, redundant power is converted into electric energy to be stored, and when the engine power cannot meet the vehicle driving requirement, engine power and second motor power are coupled to the transmission shaft through the hybrid power transmission. In the pure electric mode, power of the second motor is transmitted to the transmission shaft through the hybrid power transmission.