816 results about "Hydraulic circuit" patented technology

The invention discloses a harvester header height control method and system based on multi-source sensing information fusion, and belongs to the field of agricultural machinery automation control. The problems that in the prior art, actually-measured height detection deviation is large, and the height detection data source is single are solved, the longitudinal height and the transverse inclination angle of the header are calculated and adjusted in real time through multi-source sensor data, the accuracy of the height and the posture of the header is guaranteed from multiple dimensions so as to adapt to the complex working environment, and the working efficiency is improved. The precise control process of a hydraulic loop driving system on longitudinal and transverse hydraulic cylinders is defined, a reasonable height difference threshold value and a reasonable angle difference threshold value are set, fine regulation and control of the height of the header are achieved, abnormal conditions such as crop cutting missing and soil shoveling are reduced, crop and topographic feature points are extracted through a visual detection system and a deep convolutional neural network, and the accuracy of crop cutting is improved. A terrain curve and an operation plane can be accurately constructed, accurate operation path guidance is provided for a header, the accuracy and quality of harvesting operation are effectively improved, and the loss rate is reduced.

Low-pressure oil enters an inlet of a proportional overflow valve, the pressure of a low-pressure system is controlled by the proportional overflow valve, pressure oil on the low-pressure side acts on a plunger control cavity of the hydraulic control overflow valve through a pressure stabilizing damper and a one-way valve, and hydraulic pushing force generated by a plunger is transmitted to an overflow valve steel ball through a disc spring; when the force obtained by multiplying the ultrahigh pressure of the inlet of the hydraulic control overflow valve by the action area of the steel ball is equal to the pushing force of the plunger, the steel ball of the overflow valve is opened to start overflowing, and the overflow pressure of the ultrahigh pressure system can be controlled by adjusting the pressure of the proportional overflow valve of the low-pressure system. The external control type ultrahigh-pressure proportional pressure regulating valve can be used for pressure regulation of a hydraulic system with the pressure being 200 MPa or above and can be used as a proportional overflow valve of an ultrahigh-pressure hydraulic system. By arranging a hydraulic loop of two auxiliary oil ports of the external control type ultrahigh pressure proportional pressure regulating valve, the pressure rising one-way proportional regulating function, the pressure unloading function and the pressure rising / falling two-way proportional regulating function of an ultrahigh pressure system can be achieved.

The invention discloses a hydraulic system sealing test bench and a sealing performance test method, and belongs to the technical field of sealing performance detection, the test bench comprises a vibration device, a pressure control system, a sealing element installation device, a flow adjusting system and a micro leakage detection unit; a to-be-tested sealing element is installed in the sealing element installation device to form a sealing cavity, and the sealing cavity is communicated with the pressure control system, the flow adjusting system and the hydraulic oil tank through pipelines to form a closed hydraulic loop. The vibration device is arranged on the outer side of the sealing element mounting device and used for applying vibration loads, the pressure control system is used for providing and adjusting hydraulic pressure in the sealing cavity, the flow adjusting system is used for controlling the flowing speed and flow of a hydraulic medium, and the micro-leakage detection unit is arranged below the sealing element mounting device and used for detecting leakage of the sealing cavity. The method has the advantages of being high in test condition controllability, high in leakage detection sensitivity, wide in adaptability and high in test result engineering guidance.

A hydraulic drive apparatus includes a hydraulic pump that discharges a working fluid; a flow dividing valve that divides a pump passage connected to the hydraulic pump into first and second passages, and changes an opening degree of each passage according to a signal that is input to the flow dividing valve; a travel system hydraulic circuit that is connected to the first passage and controls a flow of the working fluid to a travel motor; a loading system hydraulic circuit that is connected to the second passage and controls a flow of the working fluid to a loading actuator; a pressure sensor that detects a pressure supplied to the travel motor; and a control device that controls, by outputting the signal to the flow dividing valve, the opening degree of the first and second passages according to the pressure detected by the pressure sensor.

The invention discloses an emergency hydraulic system and a control method thereof. The emergency hydraulic system comprises a multi-source redundant hydraulic loop, a multi-mode sensing and fault diagnosis module, a cooperative control strategy module, a man-machine cooperative emergency operation interface module and an intelligent energy management module. By adopting the multi-source redundant hydraulic loop design, the problems that a traditional emergency hydraulic system is single in power source and lacks redundancy are effectively solved, and the reliability and stability of the system are remarkably improved. When the main hydraulic pump breaks down, the standby hydraulic pump and the pneumatic auxiliary pump can be rapidly started, continuous operation of the hydraulic system is ensured, and shutdown or safety accidents caused by system faults are prevented. Key parameters of the hydraulic system are monitored in real time, feature extraction and fault recognition are carried out on sensor data in combination with a deep learning algorithm, and rapid positioning and accurate evaluation of faults of the hydraulic system are achieved.

The invention discloses an automatic design and optimization system for a hydraulic speed control loop, which takes a large language model intelligent body as a core, realizes automatic design and optimization of the hydraulic speed control loop through semantic comprehension, knowledge retrieval and parameter optimization, and specifically comprises an LLM intelligent body, a data processing module and a data processing module, the analysis module is used for analyzing natural language input containing design requirements and performance targets of a user, generating a loop structure in combination with a local knowledge base and calling an optimization algorithm; the local knowledge base comprises a basic hydraulic loop, a key empirical relationship and a typical structure template which are artificially extracted; and the simulation and optimization module is used for executing a swarm intelligence optimization algorithm to optimize and adjust parameters of the loop structure. The invention constructs a hydraulic speed control loop automatic design and optimization system with semantic understanding, automatic generation and adaptive optimization capabilities, and aims to realize full-process intelligent design from user demand input to loop structure generation and performance optimization.

The utility model belongs to the field of hydraulic systems, and particularly relates to a hydraulic circuit for a lifting load of hoisting equipment, when the hydraulic circuit operates normally, especially when a first hydraulic pipeline is intact, control pressure applied to a descending brake valve is sufficient to overcome pre-tightening force of an elastic pre-tightening piece; on the contrary, if the first hydraulic pipeline is broken and the pressure in the first hydraulic pipeline is sharply reduced, the pressure of the control end of the descending brake valve is not enough to overcome the pre-tightening force of the elastic pre-tightening piece, at the moment, the valve element of the descending brake valve is switched back to the blocking position, the second hydraulic pipeline is blocked, and the load is prevented from being further reduced; therefore, the load can be safely prevented from being out of control and falling.

A hydraulic circuit includes a first oil path, a second oil path, a hydraulic control circuit, a third oil path, a check valve, and a relief valve. The first oil path links to a discharge port of a first oil pump. The second oil path links to a discharge port of a second oil pump. In the hydraulic control circuit, a first regulator valve is disposed downstream of a confluence point of the first oil path and the second oil path. The third oil path connects a suction port of the first oil pump and a strainer. The check valve is provided in the third oil path and restricts a movement of oil toward the strainer side. The relief valve is provided in the third oil path and discharges oil in the third oil path to an outside when a pressure in the third oil path exceeds a reference pressure.

The underlying invention relates particularly to a hydraulic forming machine, more particularly a forging hammer, for workpiece forming, comprising a hydraulic cylinder for driving a ram configured for workpiece forming, and a hydraulic circuit configured for operation of the hydraulic cylinder, wherein the hydraulic circuit has an actuator with an adjustably variable volume flow via which a first hydraulic working chamber of the hydraulic cylinder, used to accelerate the ram during the execution of a working stroke (A) for workpiece forming, can be provided with hydraulic fluid. The hydraulic circuit is configured to adjust and vary the volume flow of the valve or actuator, depending on a setpoint speed (Vsoll) of the ram to be achieved in an acceleration phase of a working stroke (A), and to optimize the subsequent movement phase.

An apparatus for generating an ultra-high pressure fluid jet during drilling comprises a drilling motor; a housing structure connected with the drilling motor; and a drill bit assembly connected at the downstream end of the housing structure. The housing structure comprises an oscillation tool configured to transfer a pressure energy from pumped drilling fluid to a closed loop hydraulic circuit and pressurize the same therein; a pressure intensifier pump configured to increase hydraulic pressure of closed loop hydraulic fluid to an ultra-high pressure; and a pressure transfer tool configured to transfer the ultra-high pressure from the closed loop hydraulic fluid to the low-pressure drilling fluid, without any communication between the drilling fluid and closed loop hydraulic fluid and without requiring the drilling fluid to enter pressure intensifier pump. The ultra-high pressure of drilling fluid is directed to the drill bit assembly to aid drilling efficiency in drilling applications.

Proposed is an electro-hydraulic brake device including a main brake unit configured to provide a braking fluid to a plurality of wheel cylinders by driving a motor, a storage unit connected to the main brake unit, and configured to store the braking fluid, an auxiliary brake unit configured to provide the braking fluid to one or more of the wheel cylinders when an operational failure of the main brake unit occurs, and configured to divide a hydraulic line of a hydraulic circuit unit physically by a function, wherein the hydraulic circuit unit disposed at a block unit is connected to the main brake unit and the storage unit.

The invention discloses a motorcycle ABS performance detection method, system and device and a medium, and relates to motorcycle ABS detection. According to the method, the brake fluid is subjected to dewatering and degassing treatment, and target brake fluid is obtained; establishing an instruction transmission channel; the brake pipeline is subjected to air exhaust operation, and the negative pressure establishment rate and the dwell pressure attenuation rate are measured; judging whether the sealing performance of the brake pipeline reaches the standard or not; if the sealing performance reaches the standard, target brake fluid is injected into the hydraulic loop in an excessive injection mode of the preset target liquid level amount, and after injection is completed, the target brake fluid is controlled to reach the preset liquid level height through a back suction device; and a brake pressure release instruction is sent to the hydraulic device through the instruction transmission channel, and after the hydraulic device drives the brake device to complete brake operation of a preset number of rounds according to the brake pressure release instruction, a detection result is obtained according to the position change of the brake device. By implementing the scheme, the performance of the ABS system can be effectively detected, and the ABS system can be effectively controlled.

To put new thought to a control method, and to obtain good operability, upon providing a control circuit for option hydraulic actuator in a hydraulic circuit for a working machine. There is provided an option merging oil passage that allows the discharge oil of the first, second hydraulic pumps to be merged thereinto, and the option merging oil passage is provided with an option control valve and a compensator valve, and is configured such that a variable relief valve is connected to a signal pressure introduction oil passage connected to the compensator valve, a supply pressure to an option hydraulic actuator can be variably controlled by changing a relief setting pressure of the variable relief valve; on the other hand, distributed flow rate computation with respect to the other hydraulic actuators, opening area control of the option control valve, the other hydraulic actuators control valves, and discharge pressure control of the first, second hydraulic pumps are optimized.

A H2 defueling system for automating defueling of a hydrogen tank is disclosed. The H2 defueling system comprises: a hydrogen storage tank containing hydrogen; a plurality of electronic valves configured for regulating hydrogen discharge of hydrogen from the hydrogen tank; at least one pressure sensor and at least one temperature sensor; a hydraulic circuit interconnecting the hydrogen tank, the plurality of electronic valves, the at least one pressure sensor and the at least one temperature sensor; and a control unit configured to: receive input from the at least one pressure sensor and the at least one temperature sensor; automatically adjust the flow rate of gaseous hydrogen from the storage tanks based on the input from the sensors to maintain the gaseous hydrogen within pressure limits; modulate operations of the plurality of electronic valves to control hydrogen discharge to control the flow of hydrogen from the hydrogen tank.

The utility model relates to the field of rock drill testing, and discloses an impact and torque testing platform of a rock drill, which comprises a pump station base, a rock drill testing operation table is arranged on one side of the pump station base, a hydraulic system assembly is arranged on the other side of the pump station base, and a rock drill impact testing table is arranged on the left side of the pump station base. A rock drill torque test board is arranged on the left side of the pump station base, a second brake base plate is fixedly connected to the top of the bottom plate, and a first brake base plate is arranged on the top of the second brake base plate. According to the utility model, the performance of the rock drill is tested through the hydraulic loop system, data are acquired by operating the test board computer, the system is simple to operate, high in working efficiency and high in safety, the rock drill is tested in advance before being installed, the problem of qualification detection is solved, and the hydraulic system of the drill carriage is prevented from being damaged due to the own problem of the rock drill; the test run cost is low, the loss is low, and the dependence of debugging and testing links on technicians is reduced.

An electric drive for a vehicle comprises a housing, an electric machine with a stator connected to the housing and including stator end-windings, a rotor rotatable relative to the stator, and a driveshaft connected to the rotor and rotatably supported in the housing about an axis of rotation, a transmission to transmit a rotary movement from the driveshaft to drive a driveline of the vehicle, and a hydraulic circuit for circulating a fluid.

The invention provides a multi-station servo drive hot press molding composite production device, which belongs to the technical field of hot press molding, and comprises a hot press molding base, the side edge driving sliding rails are arranged at the two side ends of the hot press molding base; the lower forming plate is arranged at the upper end of the hot press forming base; the hydraulic fixing assemblies are arranged, each hydraulic fixing assembly comprises a side edge forming clamping sleeve, a reset sliding groove, a reset push plate, a clamping reset spring, a pressurizing sliding rod, a side edge forming clamping plate, a hydraulic groove and a sealing ring, and the side edge forming clamping sleeves are slidably connected to the side inner walls of the side edge driving sliding rails. The hydraulic grooves are formed in the side edge forming clamping sleeves, hydraulic oil is arranged in the hydraulic grooves, and a hydraulic loop is automatically closed in the descending process of the hot-pressing main pressing plate, so that the side edge clamping plates are seamlessly switched into a high-strength locking state from an initial buffering clamping state.

The invention discloses a reciprocating type passenger ropeway constant deceleration control system, and relates to the technical field of brake control. According to the method, the first-stage constant deceleration braking mode and the second-stage constant torque braking mode are set, analysis is carried out through the second-stage braking conversion algorithm, the deceleration abnormal index, the speed tracking abnormal index and the response abnormal index are output, then the mode abnormal total value is obtained, the braking state is judged, self-adaptive mode switching is achieved, and the braking efficiency is improved. Constant braking deceleration is maintained, swinging of a hanging box is reduced, comfort of passengers is improved, brake rubber abrasion is reduced, meanwhile, regional debugging is not needed, and the operation difficulty of a construction site is reduced; hydraulic loop parameters are analyzed through a failure judgment logic algorithm set by the hydraulic redundancy protection module, a loop abnormal total value is output, and hydraulic loop switching is carried out based on the loop abnormal total value; and through visual display of the fault memory interaction module, the safety redundancy of the braking system is improved, fault tracing and maintenance are facilitated, and the running reliability of the cableway is guaranteed.

The invention provides a hydraulic damping control anti-swing mechanism and a control method, belongs to the field of logistics sorting and automatic equipment, and constructs a closed-loop feedback control system to realize flexible braking of equipment. Active anti-swing and flexible brake control of the stacking machine are achieved by adjusting hydraulic damping force in real time, and therefore the purposes of reducing mechanical impact and improving positioning precision and operation safety are achieved. Comprising a hydraulic loop mounted at the top of the conveying equipment, a cooling assembly for cooling the hydraulic loop, a transmission assembly for transmitting hydraulic oil in the hydraulic loop to circularly flow during operation of the conveying equipment, and a guide wheel assembly, and the inertial measurement unit is used for monitoring the running state of the conveying equipment and sending signals for controlling and adjusting the flowing state of the hydraulic oil to the hydraulic loop.

The invention discloses a bidirectional and horizontal action hydraulic capstan test device and method, and belongs to the technical field of test bench testing and test equipment. The device comprises a supporting seat, a hydraulic capstan and a load oil cylinder, the load oil cylinder adopts a unique structure that a piston rod is fixed and a cylinder body can move bidirectionally, and two ends of the cylinder body are connected with the hydraulic capstan winding drum through two steel wire ropes with opposite winding directions. The core is a set of hydraulic loop integrating an electric proportional overflow valve and four one-way valves: when a cylinder body is pulled, oil in a pressed cavity needs to return through the electric proportional overflow valve, and the simulation load force can be accurately controlled by setting the pressure of the valve through an electric signal; meanwhile, the loop can automatically supplement oil to the negative pressure cavity, vacuum is prevented, and stable load is ensured. The problem that in the prior art, a variable load cannot be provided for a bidirectional and horizontal acting hydraulic capstan is solved, precise and stable simulation of a single oil cylinder on a bidirectional load is achieved, and the hydraulic capstan load simulation device has the advantages of being compact in structure, precise in control, safe and reliable.

The invention relates to a hydrostatic driving speed regulation system, method, equipment and medium for a harvester, and relates to the technical field of mechanical driving speed regulation, the system comprises a closed hydraulic loop composed of a walking pump and a variable displacement motor, the walking pump is driven by an engine, and a two-position four-way proportional reversing valve group is arranged on the hydraulic loop; a rotating speed sensor is mounted on the variable displacement motor; the controller is used for acquiring real-time state information of the harvester and determining a speed regulation control strategy based on the real-time state information, and the speed regulation control strategy is a first control strategy or a second control strategy; and the speed regulation control strategy is sent to a two-position four-way proportional reversing valve set, so that the two-position four-way proportional reversing valve set adjusts the displacement of the walking pump and the displacement of the variable displacement motor according to the speed regulation control strategy. The technical effects that the speed regulation control strategy is accurately determined according to the real-time state information of the harvester, the displacement of the walking pump and the displacement of the variable displacement motor are reasonably adjusted, and the driving speed regulation requirements of the harvester under different working conditions are met are achieved.

A swimming pool cleaning apparatus may include a body, a hydraulic circuit for liquid circulation between a liquid inlet and a liquid outlet and through a filtration chamber, driving and guiding members of the body on a submerged surface, and defining a guide plane (XY), and an adjustment mechanism for the orientation of a liquid flow, disposed at the outlet of the liquid outlet. The adjustment mechanism is adapted to direct the flow of liquid that escapes from the liquid outlet in (at least) two predefined directions, one of which corresponds to a first direction inclined with respect to the guide plane and the other of which corresponds to a direction substantially perpendicular to the guide plane.

An agricultural system includes a header comprising a gauge wheel and a frame, in which the gauge wheel and the frame are coupled to a hydraulic cylinder that is configured to adjust the gauge wheel relative to the frame. The agricultural system also includes a hydraulic circuit fluidly coupled to the hydraulic cylinder, in which the hydraulic circuit is configured to control a fluid flow into and out of the hydraulic cylinder to adjust the gauge wheel relative to the frame, and the hydraulic circuit includes an accumulator configured to enable an amount of fluid in the hydraulic cylinder to change during a harvesting operation of the agricultural system such that the gauge wheel may oscillate from a set position during the harvesting operation.

The present invention relates to an agricultural implement, in particular for soil tillage, comprising: an implement frame comprising a base frame and at least one tool frame, wherein the tool frame is arranged on the base frame so as to be foldable about a folding axis, in particular laterally with respect to the base frame, and so as to be pivotable about a pivot axis, in particular in an implement longitudinal direction; an actuator system arranged on the implement frame for moving the tool frame between a working position and a transport position, wherein the actuator system comprises at least one first cylinder unit for, in particular laterally, folding the tool frame about the folding axis and a second cylinder unit for pivoting the tool frame about the pivot axis; and a hydraulics system having at least one hydraulics circuit for actuating the actuator system. According to the invention, the at least one first cylinder unit and the second cylinder unit are connected to the same hydraulic circuit, wherein the hydraulic system is designed such that the tool frame is pivoted, in particular from the working position in the direction of the transport position, about the folding axis depending on a pivot angle of the tool frame about the pivot axis.

A hydraulic circuit and control method for achieving rapid actuation of an AGC cylinder in a rolling mill, comprising first to fifth check valves, first to fourth servo valves, first to second hydraulically controlled check valves, a solenoid reversing valve, and first to second displacement sensors. The method comprises the following steps: before the hydraulic pump station is started, the control signals of the first to fourth servo valves are set to 0, and the solenoid reversing valve is de-energized. Upon startup of the hydraulic pump station, the oil source pressure Ps increases. When Ps exceeds 5 MPa, the first servo valve and displacement sensor, along with the operating-side AGC cylinder engagement position, close the loop and control the piston of the operating-side AGC cylinder to retract to 2 mm from its highest position. The third servo valve, second displacement sensor, and transmission-side AGC cylinder operate similarly. The control signals of the second and fourth servo valves remain 0, and the solenoid reversing valve remains de-energized. After Ps reaches the system's rated operating pressure, the first and third servo valves are used to control the roll gap to a preset position. The motion displacement curves of the operating-side and transmission-side AGC cylinders are set, and the rolling mill is put into operation in the set operating mode.

A concrete bridge deck finishing machine for bridge deck construction and repairs comprises an elongated, horizontally extending box frame in the general form of a parallelepiped, which is elevated above a deck or roadway to be finished by a plurality of vertically upright, adjustable jack stands that are propelled hydraulically to traverse roadway surfaces, travel rails or forms. A reciprocating carriage suspended from the frame controls a downwardly suspended finishing head apparatus that contacts the concrete surface below for striking off, densifying and / or finishing. The carriage transversely moves back and forth in response to hydraulic circuitry actuated by a plunger driven ramp that separately controls the rate of machine propulsion, carriage traversing speed, carriage deceleration, and the direction of carriage travel. Carriage travel and reversing is synchronized with proper roadway travel commands from mechanically triggered hydraulic valves.

A hydraulic motor pump unit for pressurising a hydraulic fluid in a hydraulic circuit. The motor pump unit includes a motor having a motor stator holding a circular array of coils and a motor rotor having a motor rotor body having an outer circumferential rotor surface holding a circular array of magnets. The motor rotor body is positioned within the motor stator holding the magnets opposite the coils. A pump is drivable connected to the motor rotor. A housing body provided with a pump chamber for housing the pump and a cylindrically shaped coil support for supporting the circular array of coils. The housing comprises at least one housing end cap which is connected to the coil support which housing end cap is provided with a fin pattern for an air cooling of the housing to an environment.

A single shaft suspension system includes right and left dampers, first and second hydraulic circuits, a first pressurization mechanism in fluid communication with the first and second hydraulic circuits, and a second pressurization mechanism connected in series with the first pressurization mechanism. The first pressurization mechanism is a cycloid pump and provides roll control by generating a pressure difference between the first hydraulic circuit and the second hydraulic circuit, which raises the fluid pressure in the first working chamber of the right damper and the second working chamber of the left damper. Or hydraulic pressure within the first working chamber of the left damper and the second working chamber of the right damper to provide stiffness against roll of the vehicle while turning. The second pressurization mechanism regulates static pressure within the first hydraulic circuit and the second hydraulic circuit by adding hydraulic fluid to and removing hydraulic fluid from the first hydraulic circuit and the second hydraulic circuit.

To provide a hydraulic circuit that includes a hydraulic distribution module and at least one hydraulic regulator device that can manage the primary flow.SOLUTION: A distribution module 102 comprises a spool 11, 21 including an inlet recess 111, 121 and a drain recess 112, 122. The inlet recess and the drain recess are configured such that the flow rate of fluid that enters the utility E1, E2 is equal to or less than the flow rate of fluid that exits the utility. Further, a first driving channel 31 and a second driving channel 32 are provided respectively, so that a pressure obtained upstream of the drain recess acts on a first side 21a, 22a of a three-way regulator device 21, 22, and so that a pressure obtained downstream of the drain recess in the first driving channel acts on a second driving-channel side 21b, 22b of the three-way regulator device, and an additional force.SELECTED DRAWING: Figure 1

The present invention relates to a method for operating a hydrostatic drive system of a mobile working machine, wherein the hydrostatic drive system comprises a hydraulic pump (12) with adjustable delivery volume and at least one hydraulic motor (3) connected to each other in a hydraulic circuit, wherein the hydraulic pump (12) is driven by a drive motor and the at least one hydraulic motor (3) is configured to drive a wheel of the mobile working machine, characterized in that the method comprises the following steps: a) Determining a speed that corresponds to the actual speed of the mobile working machine or to a quantity dependent on it; b) Determining a target speed value that represents a target value for the speed recorded in step a); c) Control of the speed recorded in step a) taking into account the speed setpoint determined in step b) by changing a control variable for the hydraulic pump (12) while a defined speed of the drive motor is requested; d) Increasing the load exerted on the drive motor by the drive system, while in step c) the speed is regulated; e) Storing the current value of the control variable for the hydraulic pump (12) when, during the increase of the load in step d), it is determined that an operating variable of the drive motor or an operating variable of the hydrostatic drive has reached a first target value.