1246results about "Fluid steering" patented technology

An apparatus for operating a load-controlled hydraulic supply of an agricultural tractor includes a hydraulic pump which is adjustable with respect to the displacement volume for supplying pressurized hydraulic fluid, a proportional valve which is electrically actuatable, a primary hydraulic consumer to carry out a superordinate hydraulic function and to be directly connected to a conveying outlet of the hydraulic pump, a secondary hydraulic consumer to carry out a subordinate hydraulic function and to be connected to the conveying outlet of the hydraulic pump via the proportional valve, and a control unit configured to move the proportional valve into a closed valve position when the control unit recognizes that at least one of a required power of the primary and secondary hydraulic consumers exceeds the conveying capacity of the hydraulic pump and the subordinate hydraulic function of the secondary hydraulic consumer is inactive.

The invention belongs to the related technical field of hydraulic drive, and discloses an unmanned tractor hydraulic drive system which comprises an engine, a transfer case, a load-sensitive pump 15, a load-sensitive proportional multi-way valve 16, a straight hydraulic motor set 17, a steering metering pump 13, a priority valve 12, a speed regulating valve set 8, a three-position four-way electromagnetic reversing valve set 9, a hydraulic control one-way valve set 10 and a steering hydraulic motor set 11. Hydraulic drive is adopted, power is transmitted through an oil way, a transmission system is simple, stepless speed change can be achieved, speed regulation is convenient, and the tractor can be driven by controlling the opening degree and direction of a valve of a hydraulic element through electric signals; through the arrangement of the load-sensitive proportional multi-way valve and the load-sensitive pump, the problem that the driving capacity is lost due to uneven loads when motors are connected in parallel can be effectively solved, wheels of the tractor can keep rotating synchronously under different load conditions, and the stability and the running performance of the tractor under complex ground conditions are ensured.

The invention relates to the technical field of loader brake valves, and discloses a hydraulic brake valve and a hydraulic system thereof.The hydraulic brake valve comprises the hydraulic brake valve, the hydraulic brake valve is composed of a one-way valve, a brake valve set, a brake lamp pressure switch, a low-pressure alarm pressure switch, a shuttle valve, a high-low pressure unloading valve and a throttling hole, and the high-low pressure unloading valve and the throttling hole are integrated; a P port, an A port, a B port, a T port, an LS1 port, an LS port, a low-pressure alarm pressure switch and a brake lamp pressure switch are arranged outside the hydraulic brake valve. A liquid filling valve is omitted, an oil source of the full-hydraulic power braking system is taken from an existing priority valve CF port of equipment, pressure feedback signals are selected through a shuttle valve on a hydraulic braking valve, the pressure feedback signals are transmitted to the priority valve, and liquid filling and energy supplementing of the full-hydraulic power braking system or steering work of a steering system is achieved. The brake has the remarkable advantages of being fast in brake response, low in noise, low in failure rate, high in safety coefficient, compact in structure, low in cost and low in energy consumption.

An auxiliary steering device for a hydrostatic vehicle steering system, includes an input shaft, which can be actuated or set in rotation by a steering wheel, an output shaft for actuating a steering metering valve, and a planetary gearing. The planetary gearing includes a planetary wheel carrier with multiple planetary wheels, which mesh with a sun gear and a surrounding ring gear. The input shaft is connected to the planetary wheel carrier and the output shaft is connected to the sun gear in each case for conjoint rotation. The auxiliary steering device has an electric drive for exerting a torque on the ring gear, a braking device for fixing the input shaft, and a coupling device for producing a rotationally fixed connection between the output shaft and the planetary wheel carrier.

The invention belongs to the technical field of hydraulic systems, and discloses a drive-by-wire full-hydraulic system and method and a steering method. Wherein the drive-by-wire full-hydraulic system comprises an integrated control valve module, the integrated control valve module is connected with a hydraulic oil tank, an oil filter and an electric control full-hydraulic steering gear module, the electric control full-hydraulic steering gear module is connected with a control module and a wheel angle sensor, and the hydraulic oil tank is sequentially connected with an electronic oil pump and the oil filter; according to the system, hydraulic oil leakage can be effectively prevented, the safety risk is remarkably reduced, natural resources and the ecological environment are protected, consistency and synchronization of actual steering and steering required by control are achieved, steering controllability is improved, and system safety is further improved.

A pure electric mining dump truck hydraulic system comprises a hydraulic steering system and a hydraulic lifting system, and the hydraulic steering system comprises a steering plunger pump, an energy accumulator, a multi-way valve assembly, a steering valve, a two-way unloading valve, a steering cylinder and an electromagnetic reversing valve; the lifting system comprises a gear pump, an overflow valve, a lifting valve, an oil suction filter, a lifting control handle, a pilot valve block, a bounce valve, a lifting cylinder and a lifting hydraulic oil tank. And the steering plunger pump and the lifting plunger pump are driven by a double-shaft extension motor. A single motor can drive the two hydraulic systems to operate stably, space is saved, meanwhile, jamming and preparation time of the two systems during operation and switching are shortened, energy is saved, and efficiency is improved.

An auxiliary hydraulic system including an accumulator, a control valve, and a hydraulic connector. The accumulator connects to a primary hydraulic system including a hydraulic pump, a brake circuit, and a steering circuit. The control valve selectively allows or prevents flow from an accumulator to at least one of the brake circuit and the steering circuit. The hydraulic connector selectively connects an external source to the accumulator and the control valve.

A mining dump truck steer-by-wire control system based on a state machine comprises the following steps that (1) a steering controller SCU receives data of a sensor and a vehicle control unit VCU through a sensor data processing layer and a CAN message analysis layer; (2) the steering controller SCU integrates the input data in the first step and submits the input data to a fault processing layer for screening; (3) the input data and the fault data are integrated and submitted to a state machine module for working mode switching; (4) the steering controller SCU executes the control strategy of the current steering mode, and calculation and output are carried out; (5) the output control layer sends output data to an execution mechanism to drive a steering wheel; and (6) the steering controller SCU feeds back the state information of the current system to a CAN message coding layer for message coding through a state feedback layer, and finally sends the state information to a vehicle control unit VCU.

The utility model provides a mining dump truck steering mechanism which comprises a front axle steering assembly and a hydraulic system and further comprises a rear wheel steering assembly arranged on a rear axle, the rear wheel steering assembly comprises a rear steering knuckle and a rear steering driving mechanism, and the rear steering driving mechanism is hinged to the rear steering knuckle. The two ends of the rear axle are connected with the rear knuckle through a steering fork, and a transmission universal shaft in power connection with the rear axle driving shaft and the rear brake drum is arranged in the middle of the steering fork. The rear steering driving mechanism serves as a power source for steering of the rear wheels, the transmission universal shaft penetrating through one end of the steering fork and connected with the rear axle driving shaft through the spline is arranged in the middle of the steering fork, connected with the rear brake drum, of the rear axle, and the steering function is added while transmission is achieved. The rear steering driving mechanism is hinged to the rear steering knuckle, so that steering of the rear wheels is achieved instead of rotation of the rear axle, abrasion of the rear wheels during steering can be greatly reduced, and the service life of tires is prolonged.

The invention discloses an electric steering pump integrated with a high-low pressure controller for a new energy vehicle, a system and a redundancy control method. The electric steering pump comprises a double-winding motor, a hydraulic steering pump, the high-pressure controller, the low-pressure controller, a sensor and a power actuator. A high-voltage winding and a low-voltage winding are integrated in the double-winding motor; the double-winding motor is connected with the hydraulic steering pump, the high-voltage controller is connected with the high-voltage winding, the low-voltage controller is connected with the low-voltage winding, and compared with the prior art, triple criteria of voltage deviation, current change rate and temperature are fused, so that the fault false alarm rate is effectively reduced; and a torque smoothing algorithm based on an S-shaped transition curve is adopted, so that dual-mode seamless switching control is realized, and the response efficiency is improved.

The invention discloses a transverse fixed axle assembly capable of achieving Ackerman steering through mechanical linkage, and belongs to the technical field of engineering vehicle chassis. A rear axle is transversely and rigidly fixed to a frame through a shear-resistant box girder structure, and a front axle is connected to the frame through two springs; the rotating pair structures are symmetrically arranged at the two ends of the axle main body and comprise embedded heavy-duty bearings; one end of the steering knuckle arm is hinged to the axle main body through a rotating pair structure, and the other end is connected with the steering pull rod; one end, far away from the rotating pair structure, of the steering pull rod is connected with the steering oil cylinder; the steering pull rod of the front axle and the steering pull rod of the rear axle are crossed and hinged in an X shape, so that intersection points of axes of the front and rear wheels converge at an instantaneous steering center during steering. Abrasion and slipping of tires can be reduced, steering precision is ensured through a pure mechanical structure, the failure risk of an electric control system is avoided, and the system is suitable for heavy equipment such as mining trucks and port cranes.

The invention belongs to the technical field of hydraulic control, and particularly relates to a steering mechanism, a control method of the steering mechanism and an operation machine.The steering mechanism comprises an axle, a steering wheel and a hydraulic control system, and the hydraulic control system comprises a power-assisted steering oil cylinder used for driving the axle to execute steering operation; the oil supply path is used for supplying oil to the power-assisted steering oil cylinder; the electric control reversing valve is arranged on the oil supply way, and two working oil ports of the electric control reversing valve are communicated with a rod cavity and a rodless cavity of the power-assisted steering oil cylinder respectively; the control unit is in communication connection with the electric control reversing valve and is configured to determine the turning angle of an axle under the condition that it is determined that the driver does not place the two hands on a steering wheel; and the working position of the electric control reversing valve is switched according to the turning angle, so that the power-assisted steering oil cylinder drives the axle to return, and the steering wheel is driven to return. By the adoption of the steering mechanism, when the two hands of a driver leave the steering wheel, the power-assisted steering oil cylinder can be automatically controlled to drive the axle and the steering wheel to return.

A low-speed, large-scale, side-unloading mining dump truck capable of lateral travel. The dump truck comprises wheels, a cargo compartment, a chassis, a cab, an engine, and a driving transmission mechanism. Two axles are mounted on a single support, a turntable is installed at the upper end of the support and is connected to the chassis, and the axles, the support, the turntable, and wheels form a support unit that enables angle adjustment of the wheels relative to the chassis. A plurality of support units are arranged and mounted on two sides of the chassis. A drive mechanism for synchronously rotating the supporting units and a driving transmission mechanism for the whole vehicle are mounted on the chassis. A plurality of hydraulic cylinders for sideward tilting and lifting of the cargo compartment are installed between a lateral middle part of the chassis and a lateral middle part of the cargo compartment. Hinge mechanisms are provided on two sides of the cargo compartment and the chassis, and configured to alternately hinge and unhinge the cargo compartment relative to the chassis. The beneficial effects of the present invention lie in overcoming the challenge of side unloading for a dump truck and removing constraints on the length and width of the vehicle compartment of the dump truck.

The utility model discloses a 16-wheel desert drilling machine integral moving and transporting system capable of steering independently, which comprises a plurality of groups of moving and transporting modules uniformly distributed along the periphery of a drilling machine base, each group of moving and transporting modules comprises a gooseneck frame with a heavy frame structure, the front end of each gooseneck frame is hinged with the end part of the drilling machine base through a pin shaft, and the tail end of each gooseneck frame is hinged with an axle system through a pin shaft; the axle system comprises a middle longitudinal beam which is located in the center of the sub-moving module and arranged in the longitudinal direction, the front end and the rear end of the middle longitudinal beam are each provided with a set of axle steering frames, and steering driving columns penetrating through the middle longitudinal beam are connected to the middles of the axle steering frames in a welded mode; the bottoms of the two ends of the axle bogie are connected with the parallel loading axle through hoops and end plates, and rims and tires are assembled at the two ends of the parallel loading axle. By controlling the steering hydraulic cylinder, the included angle of the tires can be adjusted, and then the turning radius of the moving and transporting system can be accurately controlled to adapt to different road condition requirements.

The invention discloses an unmanned mine car front and rear wheel synchronous steering system which comprises a car frame, a front steering axle and a rear steering axle, and the front steering axle and the rear steering axle are installed on a car and control steering through a steering system. The steering system comprises a front axle working cylinder, a front axle driven cylinder, a rear axle working cylinder and a rear axle driven cylinder, the front axle working cylinder and the front axle driven cylinder control front wheels of a vehicle to rotate, the rear axle working cylinder and the rear axle driven cylinder control rear wheels of the vehicle to rotate, and cavities of the front axle working cylinder and the rear axle working cylinder are communicated with a working port A and a working port B of a three-position four-way reversing valve through pipelines respectively. Cavities of the front axle driven cylinder and the rear axle driven cylinder are communicated through a valveless rigid connecting pipeline to form a rigid series oil way, and in the rigid series oil way, the amount of oil discharged by the front wheel working cylinder and the front axle driven cylinder is equal to the amount of oil received by the rear wheel working cylinder and the rear axle driven cylinder. Mechanical hydraulic synchronization of steering angles of front and rear wheels of the vehicle is realized, delay and fault risks of dependence on sensors are eliminated, and high-reliability rigid synchronization is realized.

The present embodiments relate to a steering control device and method. Specifically, there may be provided a steering control device and method in which an RWA control module may perform control to detect whether a data signal is transmitted / received through a communication module, outputs an operation state for a communication channel of the communication module, and select and use a communication channel capable of data signal transmission / reception to thereby increase reliability and may perform control so that, when any one communication channel fails, data signal transmission / reception is possible through another communication channel.

The utility model discloses a planet multiple steering mechanism which comprises a gearbox body provided with an output shaft, a planet carrier and a planet wheel, an inner gear ring and an outer gear ring are arranged on the outer wall of the gearbox body, and the inner gear ring and the outer gear ring drive the output shaft to rotate and output torque. A first wet clutch bag capable of locking the planet carrier and the output shaft and a second wet clutch bag capable of fixing the planet carrier are arranged in the gearbox body. The rear end of the gearbox body is provided with a lubricating oil port used for injecting oil into the first wet clutch pack and the second wet clutch pack, a first high-pressure oil hole used for injecting oil into the first piston corresponding to the first wet clutch pack and a second high-pressure oil hole used for injecting oil into the second piston corresponding to the second wet clutch pack. The driving method comprises a two-drive mode, a non-multiple four-drive mode and a multiple four-drive mode and can be used for a tractor gearbox and a tractor steering drive axle, front wheel multiple is provided when a tractor steers, and small-radius steering is achieved.

The invention belongs to the technical field of new energy automobile steering systems, and discloses a new energy automobile electric hydraulic power-assisted steering system and a control method thereof.The system integrates a double-source redundant hydraulic power unit, a hydraulic adjusting unit, a multi-dimensional working condition sensing unit and an intelligent main controller; the multi-dimensional working condition sensing unit is integrated with a road adhesion coefficient detection module and a battery remaining capacity detection module. The control method is layered look-ahead matching control and is executed by an intelligent main controller in parallel: a power-assisted decision-making layer divides a three-stage power-assisted mode according to multi-dimensional perception information, and limits a steering angular velocity when power-assisted is enhanced on a low-attached road surface; the energy optimization layer predicts and implements prospective energy storage and pump rotating speed self-adaptive adjustment based on the intention of a driver; and the fault diagnosis layer realizes rapid fault identification and redundancy switching through multi-parameter collaborative diagnosis. The contradiction of high energy consumption, response delay and weak safety guarantee of a traditional system is solved, and power-assisted steering which is safe, energy-saving, fast in response and high in adaptability is achieved.

In a method for outputting steering status information to a driver of an agricultural tractor (12), it is provided that information provided to a control unit (40) via a data interface (44) regarding a mounted tire model or type, a tire inflation pressure, an axle load on a front and / or rear axle (14, 38) of the agricultural tractor (12) and a current travel speed of the agricultural tractor (12) are transmitted in order to check on this basis whether either (i) as a first triggering condition, the current travel speed exceeds a limit value provided for emergency steering operation, which is predetermined in accordance with the mounted tire model or type, the tire inflation pressure and the axle load, or whether (ii) as a second triggering condition, the tire inflation pressure falls below a limit value provided for emergency steering operation, which is predetermined in accordance with the mounted tire model or type.-type, the driving speed and the axle load are specified, wherein, in the event that one of the two triggering conditions is fulfilled, the control unit (40) causes the output of driver information indicating a critical steering condition by controlling an operator interface (46).

The invention discloses a four-wheel steering mining dump truck. The four-wheel steering mining dump truck comprises a steering mechanism, a steering hydraulic system, a driving wheel assembly and a frame, the frame is provided with a front axle and a rear axle, the front axle and the rear axle are respectively provided with two driving wheel assemblies, the two driving wheel assemblies of the front axle are connected and mounted on a steering mechanism of the front axle, the two driving wheel assemblies of the rear axle are connected and mounted on a steering mechanism of the rear axle, and a steering wheel of each driving wheel assembly participates in steering; the front axle and the rear axle are respectively provided with an axle support, the frame is provided with a frame support, and the steering mechanism comprises a steering crank, a steering pull rod, a steering arm, a steering cylinder and a steering support; the steering hydraulic system is used for providing pressure oil for the steering cylinder and pushing the telescopic rod to stretch out or retract back. The invention further discloses a steering method of the four-wheel steering mining dump truck. The four-wheel steering electric vehicle has a four-wheel steering function, so that the turning radius of the whole vehicle is smaller, and the vehicle can adapt to a narrower road environment.

The invention relates to the field of motor pumps, in particular to a duplex-winding low-voltage motor pump. The double-low-pressure integrated controller and the hydraulic steering pump are connected to the two ends of the driving motor respectively. The driving motor comprises a double-winding stator assembly and a rotor assembly rotationally arranged on the inner side of the double-winding stator assembly, the input end of the hydraulic steering pump is connected with the rotor assembly, the hydraulic steering pump is provided with an oil inlet and an oil outlet, the double-low-pressure integrated controller comprises two sub-controllers, the double-winding stator assembly comprises two sets of stator coil windings, and the double-winding stator assembly comprises two sets of stator coil windings. And the two sub-controllers are respectively in control connection with the two sets of stator coil windings. The hydraulic steering pump is provided with the two sets of stator coil windings capable of running simultaneously or independently, when one set of stator coil winding breaks down, the other set of stator coil winding can be kept in the running state, the hydraulic steering pump is effectively driven by driving the rotor assembly to provide hydraulic steering assistance for a vehicle, and driving safety is guaranteed.

The invention provides a control system and a control method of an electric tractor, the control system comprises a vehicle control unit and a hydraulic motor controller, when the vehicle control unit detects that a hydraulic motor meets a first condition, the vehicle control unit sends a hydraulic motor idling operation command to the hydraulic motor controller, and when the vehicle control unit detects that the tractor meets a second condition, the vehicle control unit sends a hydraulic motor idling operation command to the hydraulic motor controller. When it is detected that the tractor meets the third condition, a hydraulic motor stopping command is sent to the hydraulic motor controller, and when it is detected that the tractor meets the third condition, a hydraulic motor rotating speed increasing command is sent to the hydraulic motor controller; the hydraulic motor controller receives a hydraulic motor idling operation command from the vehicle control unit, controls the hydraulic motor to enter an idling state, receives a hydraulic motor stopping command from the vehicle control unit, controls the hydraulic motor to enter a stopping state, receives a hydraulic motor rotating speed increasing command from the vehicle control unit, and controls the hydraulic motor to enter a rotating speed increasing state. According to the application, the running state of the hydraulic motor is controlled by the vehicle control unit, the hydraulic motor is started and stopped as required, and invalid energy consumption is reduced.

The invention discloses an automobile steering gear safety valve, and relates to the technical field of safety valves, the automobile steering gear safety valve comprises a hydraulic steering gear and a safety valve assembly arranged in the hydraulic steering gear, the hydraulic steering gear is internally provided with an inflow oil channel, one side of the inflow oil channel is provided with a sealing channel, and one side of the sealing oil channel is provided with a pressure relief channel; the safety valve assembly is arranged on the inner wall of the sealing oil duct and pushed by hydraulic oil, the safety valve assembly comprises a cone valve, one end of the cone valve is fixedly connected with a first spring, one end of the first spring is fixedly connected with a valve seat, and a cleaning mechanism used for cleaning the surface of the cone valve is arranged in the cone valve; the cleaning mechanism comprises a moving pipe rotationally connected to the interior of the cone valve, stubborn sediments attached to the surface of the cone valve can be cleaned, and the problem that part of the stubborn sediments are continuously attached to the surface of the cone valve and are difficult to fall off, and consequently the cone valve is not tightly sealed is solved.

An auxiliary steering device for a hydrostatic vehicle steering system, includes an input shaft, which can be actuated or set in rotation by a steering wheel, an output shaft for actuating a steering metering valve, and a planetary gearing. The planetary gearing includes a planetary wheel carrier with multiple planetary wheels, which mesh with a sun gear and a surrounding ring gear. The input shaft is connected to the planetary wheel carrier and the output shaft is connected to the sun gear in each case for conjoint rotation. The auxiliary steering device has an electric drive for exerting a torque on the ring gear, a braking device for fixing the input shaft, and a coupling device for producing a rotationally fixed connection between the output shaft and the planetary wheel carrier.

The invention discloses a bidirectional driving control method and system for a concentrated transportation machine, and belongs to the technical field of engineering machinery. The method aims at solving the safety problem of the two-way concentrated transportation vehicle during forest farm operation. The method comprises the steps that a starting signal is obtained after an engine is started; triggering detection of road condition information and seat direction based on the starting signal; if the direction of the seat is the forward direction, a control signal of the driving unit is generated to activate an operation handle and a front accelerator pedal of the vehicle; if the direction of the seat is reverse, a control signal of the driving unit is generated to activate a rear accelerator pedal of the vehicle; selecting a driving mode according to the road condition information; according to the driving mode and the direction of the seat, a control signal of a steering unit is generated so as to adjust vehicle steering. The driving mode, steering control and driving control related execution mechanisms can be automatically switched according to the seat direction and the road condition information, the manual operation complexity is reduced, various terrain requirements are met, and the safety of forest land driving is improved.

The invention relates to a high-voltage and low-voltage dual-motor steering pump driving system for an electric commercial vehicle, belongs to the technical field of vehicle steering control, and is mainly used for solving the safety risk caused by power-assisted steering interruption when a motor of a traditional single-motor driving steering pump breaks down. The system comprises a hydraulic steering pump, a high-voltage motor, a low-voltage motor, a power coupling mechanism, a first clutch, a second clutch, a rotating speed sensor, a temperature sensor and an electronic control unit. The high-voltage motor and the low-voltage motor are selectively connected with an input shaft of the power coupling mechanism through corresponding clutches, and an output shaft of the power coupling mechanism is rigidly connected with a driving shaft of the hydraulic steering pump; the electronic control unit receives sensor data through the signal processing module, and the drive control module is immediately switched to the standby motor and controls the clutch to act. Through the dual-motor redundancy design and the real-time fault switching mechanism, the system is suitable for an electric automobile and a steering system with a high reliability requirement, and the driving safety is remarkably improved.

A hauling vehicle includes a steering circuit having a steering cylinder steered by pressure oil from a hydraulic source, a steering valve that controls the flow of pressure oil to the steering cylinder, and an accumulator that stores pressure oil from the hydraulic source and can supply it to the steering cylinder via the steering valve. The steering circuit is connected to the hydraulic source and the hydraulic fluid tank via a composite control valve. The composite control valve has a first position for communication between the steering circuit and the hydraulic source and blocking communication between the steering circuit and the hydraulic fluid tank, and a second position for communication between the steering circuit and the hydraulic source and communication between the steering circuit and the hydraulic fluid tank. The composite control valve has a throttle in the oil passage that connects the steering circuit in the second position with the hydraulic fluid tank.

The invention discloses a semitrailer rear axle electric control hydraulic steering system based on multi-sensor fusion. The semitrailer rear axle electric control hydraulic steering system comprises a control unit, a sensor system, a motor system and a hydraulic system. The sensor system comprises a vehicle speed sensor, a folding angle sensor and a steering angle sensor; the motor system comprises a motor and a motor controller; the hydraulic system comprises a hydraulic pump, a proportional servo valve and a hydraulic cylinder; during working; the control unit is used for automatically calculating a target steering angle through the vehicle speed information and the folding angle information, comparing the target steering angle with feedback actual steering angle data to obtain an error signal, and outputting a control current of the proportional servo valve according to the error signal; the motor provides power for the hydraulic pump, so that hydraulic oil is provided for the hydraulic cylinder, the opening degree of the proportional servo valve is adjusted under the action of control current, then the flow of the hydraulic cylinder is controlled, and the hydraulic cylinder is used for driving a rear axle of the semitrailer to move, so that the rear axle generates a corresponding steering angle.

The invention relates to a method for operating a self-propelled road-building machine, in particular a road-compacting driving machine, and to a self-propelled road-building machine, in particular a road-compacting driving machine.

The invention relates to an intelligent vehicle pump and steering motor heterogeneous redundant steering system and a control method thereof. The steering system comprises a main driving module of a variable-speed pump-driven double-steering power-assisted cylinder, an electronic control module, a control redundancy module, a manpower and unmanned steering redundancy module, a high-pressure source redundancy module, a pipeline redundancy module, a steering mode redundancy module, an overload protection module, a corner precise control module and an unmanned steering redundancy module. According to the steering system, unmanned switching among different steering modes is achieved through the redundant synergistic effect of a plurality of modules so as to deal with hydraulic assembly faults and different driving modes, it is guaranteed that the steering system has the redundant safety function, and the reliability and safety of a vehicle are improved. The system can be switched to the standby system when the main system breaks down, it is ensured that the vehicle continues to keep controllability, the emergency capacity and fault tolerance are enhanced, and accidents caused by single-point faults are avoided.