1309results about "Servometer circuits" patented technology

The invention discloses a paper-plastic mold positioning auxiliary system capable of monitoring hydraulic pressure in real time through an AI. The paper-plastic mold positioning auxiliary system comprises an AI control center, a hydraulic monitoring unit, an air pressure monitoring unit, a positioning auxiliary execution unit, an abnormity protection unit and a data acquisition and transmission module. The hydraulic monitoring unit is used for collecting hydraulic oil cylinder pressure, temperature, hydraulic oil viscosity and equipment operation duration data; the air pressure monitoring unit collects air pressure, flow and valve delay time data of a pipeline valve; the data acquisition and transmission module transmits data to the AI control center, and the AI control center analyzes abnormity through a model and calculates a correction amount; the positioning auxiliary execution unit coordinates the positioning of the servo motor and the hydraulic oil cylinder; and the abnormal protection unit receives the early warning and starts a protection action. The system solves the problems of hydraulic monitoring lag and the like, realizes hydraulic and air pressure cooperative monitoring and positioning compensation, ensures production coherence and equipment safety, and is adaptive to automatic production of paper-plastic molds.

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 relates to the technical field of logistics warehouse storage equipment, in particular to a speed reduction control method for a high-speed motor driven hydraulic system, which comprises the following steps: S1, the output torque of a high-speed motor is transmitted to a gear pump through a motor shaft, a planetary reducer and a planet carrier in sequence to drive the gear pump to work; s2, acquiring a three-phase current instantaneous signal and a direct current bus voltage signal, and performing preprocessing and frequency spectrum conversion to determine a current frequency spectrum; s3, in the current frequency spectrum, extracting an energy value in a preset frequency band with the meshing frequency and harmonic waves of the planetary gear as the center, and calculating to obtain a disturbance characterization value of the planetary gear; s4, determining a torque smooth adjustment coefficient according to the planet wheel disturbance characterization value; and S5, dynamically adjusting a dynamic response parameter of a torque control ring of the high-speed motor according to the torque smooth adjustment coefficient. The problems that in the prior art, a high-rotating-speed motor and a hydraulic pump are not matched in rotating speed, and mechanical disturbance is difficult to restrain are solved.

An electric drive for a vehicle comprises: an electric machine, a stator connected to a housing and comprising stator end-windings, a rotor rotatable relative to the stator, and a driveshaft connected to the rotor; a transmission to transmit a rotary movement from the driveshaft to a driveline; a sump containing fluid to cool and / or lubricate the electric machine and the transmission; a hydraulic arrangement comprising at least one bi-directional pump, a first suction line hydraulically connected with the pump, a stator path for cooling the stator, a second suction line connected with the pump, and a transmission path for cooling the transmission; a valve arrangement with multiple valves configured such that fluid is either supplied from the sump through the first suction line to the stator path, or through the second suction line to the transmission path.

A fluidic artificial muscle actuator may include at least one inflatable bladder defining a first inflatable segment coupled to a first member and to a second member arranged at opposite ends of the first inflatable segment, and a second inflatable segment coupled to a third member and to a fourth member arranged at opposite ends of the second inflatable segment, and an effector coupled to the first inflatable segment and to the second inflatable segment for providing an actuator output. The first inflatable segment is configured to contract in a longitudinal direction with increase in fluid pressure in the first inflatable segment and the second inflatable segment is configured to extend in the longitudinal direction with increase in fluid pressure in the second inflatable segment.

A positioner for a pneumatic actuator for actuating a control instrument, such as a control valve, of a process plant, may include an electropneumatic converter, such as a current-pressure converter; a circuit board which carries supply electronics for the electropneumatic converter a casing which comprises at least one electronics compartment in which at least one electronic component of the positioner, in particular the supply electronics, is accommodated, and a converter compartment, in which the electropneumatic converter is accommodated. The electronics compartment and the converter compartment may be spatially separated from one another. The converter compartment may be delimited at least partially by the circuit board.

A pneumatic system for a vehicle, comprising an air compressor for pressurizing an air tank. A flow passage extending from compressor is bifurcated to a first valve and to a second valve. The first valve has a first state preventing air from passing to the air tank, and has a second state allowing air to pass to the air tank. In a first mode of operation of the pneumatic system, the first vale is in said first state and the second valve controls air flow from the compressor to ambient environment. The second valve is configured to change to, or remain in, an open state when the pressure of the air upstream of the second valve is higher than a predetermined threshold, and to change to, or remain in, a closed state when the pressure of the air upstream of the second valve is lower than the predetermined threshold.

The invention discloses a hydraulic system for preventing reversing cutoff of a cone valve type filling industrial pump. The hydraulic system comprises a first oil pump set, a second oil pump set, a main oil cylinder set, a first pressure valve suction valve oil cylinder set, a second pressure valve suction valve oil cylinder set, a reversing valve set and a pipeline. The first oil pump set is composed of a first oil pump, a second oil pump and a first constant-pressure oil pump set. The second oil pump set is composed of a third oil pump, a fourth oil pump and a second constant-pressure oil pump set. The first pressure valve suction valve oil cylinder set comprises a first pressure valve oil cylinder and a first suction valve oil cylinder, and the second pressure valve suction valve oil cylinder set comprises a second pressure valve oil cylinder and a second suction valve oil cylinder. The reversing valve group comprises first to sixth reversing valves. According to the reversing cutoff prevention hydraulic system of the cone valve type filling industrial pump, through unique structural design and assembly configuration, the cutoff problem in the reversing process is effectively solved, continuous and stable operation of the system is ensured, and the working efficiency and reliability of the industrial pump are improved.

An actuator system for articulated mechanism may have a fluid actuator having a displaceable member operating an output configured to apply an output force to the articulated mechanism. A fluid system may be in fluid communication with the fluid actuator to supply the fluid actuator with motive fluid to contribute to the output force. The fluid system may include a pressure reservoir configured for storing fluid, a pumping device for controlling a pressure of the fluid in the reservoir, and a circuit for directing the fluid from the reservoir to the fluid actuator. An actuator device may be operatively connected to the fluid actuator to apply a variable force to the displaceable member to contribute to the output force.

A vacuum system comprises at least a pneumatic positioning device comprising a mount configured to hold an effecting element and a pneumatic actuator connected to the mount. A control valve is connected to the pneumatic actuator and to a fluid supply. A fluid sensor measures the pressure of the pneumatic actuator. A method includes applying a controlling signal to the control valve to vary the pressure of the pneumatic actuator and move the mount from a starting position to an end position, monitoring the pressure of the pneumatic actuator by the fluid sensor, determining when the mount arrives at the end position, and deriving the controlling parameters based on processing a set of observed parameters, wherein the set of observed parameters comprises at least the controlling signal, the varying pressure, and arrival information of the mount at the end position.

The invention belongs to the technical field of lifting tools, and particularly discloses a lifting device oil way system, a lifting device, a jack, a pressing machine and a crane. The oil way system of the lifting device comprises a lifting oil cylinder, an oil tank, a first oil inlet way, a second oil inlet way and an oil return pipeline, the first oil inlet path is an oil inlet path of the gear pump assembly; and the second oil inlet path is an oil inlet path of the plunger pump assembly. When the lifting device is in the no-load or low-pressure condition, the gear pump assembly can rapidly pump in much hydraulic oil with small pressure so that the lifting device can rapidly ascend or descend, the defect that in the prior art, the displacement speed of a hydraulic lifting pump is low under the no-load or low-pressure condition is overcome, and the user experience is improved; when the hydraulic lifting pump is in a high-pressure condition, the plunger pump assembly can pump high-pressure hydraulic oil into the lifting oil cylinder so that the lifting oil cylinder can ascend or descend slowly, the lifting device can move slowly, and the normal use requirement of a user is met.

The disclosure discloses an oil circuit system, a lifting device, an electric jack, a press, a crane, and a tire mounting / dismounting and transport apparatus. The oil circuit system comprises a lifting oil cylinder, the tank, the first oil feed line, the second oil feed line, the oil inlet / outlet line, the pressure relief line, the oil return line, the first valve, the second valve; the first oil feed line is the gear pump assembly oil feed line; and the second oil feed line is the plunger pump assembly oil feed line. Under no-load or low-pressure conditions of the lifting device, the gear pump assembly can quickly pump a larger volume of low-pressure hydraulic oil, enabling quick lifting or lowering of the lifting device. Under high-pressure conditions, the plunger pump assembly can quickly pump higher pressure hydraulic oil to the lifting oil cylinder to enable slow lifting or lowering.

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 relates to the technical field of multi-cylinder synchronous control, in particular to an electro-hydraulic-mechanical dual-redundancy high-precision execution method and system for multi-cylinder synchronous control. The method comprises the following steps: acquiring design data of the multi-cylinder hydraulic jacking equipment, and constructing a multi-cylinder operation simulation model based on a geometric structure and the design data; estimating the dynamic load overrun condition of the gate, detecting the distortion increase condition of the gate structure, and monitoring the increase trend of the gate to overcome the resistance; the multi-cylinder operation simulation model is analyzed according to the gate overcome resistance increasing condition, the local cylinder mechanical degradation increasing trend is determined, and hydraulic oil flow control distortion data is detected according to the local cylinder mechanical degradation increasing trend; detecting multi-cylinder operation stroke deviation according to local cylinder body mechanical degradation and hydraulic oil flow distortion conditions, identifying a multi-cylinder synchronization abnormal trend, and performing optimization processing to obtain multi-cylinder synchronization optimization data; through multi-cylinder synchronous control, multi-cylinder synchronous control is more efficient.

The variable-speed electric jack is characterized by further comprising an electric pump used for driving an oil cylinder assembly to conduct jacking and a variable-speed driving mechanism used for controlling starting and stopping of the electric pump and changing the jacking speed of the oil cylinder assembly by adjusting the driving frequency of the electric pump. According to the invention, through the arrangement of the electric pump, the jack is driven by electric power instead of manual power to carry out jacking work, the jacking speed is improved while the labor intensity is reduced, and through the arrangement of the variable speed driving mechanism, when an operator controls the jack to carry out jacking, a brake is treaded to drive a magnet to move relative to the position of a magnetic sensor, so that the working efficiency is improved. The oil pumping frequency of the electric pump is adjusted according to the change of the relative position between the magnet and the magnetic sensor, so that the jacking speed of the jack is changed, and in the using process, an operator can conduct stepless speed change on the jacking speed of the jack by changing the action degree of treading the brake according to the using condition.

An open and closed circuit parallel drive system and a control method based on a four-chamber hydraulic cylinder are provided. The system includes: a closed pump-controlled drive unit and an open valve-controlled drive unit. The four-chamber hydraulic cylinder is driven by the open valve-controlled drive unit with a large load power, and the operating velocity and displacement of the four-chamber hydraulic cylinder are controlled by the closed pump-controlled drive unit with a small load power, thereby improving the linearity and stability of the four-chamber hydraulic cylinder control and reducing the system installed power and throttling loss.

A hydraulic system may include an electric motor and a power source electrically coupled to the electric motor. During operation of the hydraulic system in an energy recovery mode, a net negative torque may be applied to the electric motor causing the electric motor to convert a mechanical power output to an electrical input and provide the electrical input to the power source. The hydraulic system may include a controller configured to determine a time that the hydraulic system operates in the energy recovery mode and cause, during the time that the hydraulic system operates in the energy recovery mode, application of an energy recovery prevention torque to the hydraulic system. The energy recovery prevention torque may prevent the electric motor from converting the mechanical power output to the electrical input and providing the electrical input to the power source.

The subject matter of this specification can be embodied in, among other things, an apparatus that includes a first assembly having a first piston rod having a first rod end, a second assembly arranged substantially parallel to the first piston assembly and having a second piston rod having a second rod end, an end assembly defining a first aperture configured to receive the first rod end, and a second aperture configured to receive the second rod end, a first retaining cap configured to affix to the first rod end, abut the end assembly when affixed to the first rod end, and retain the first rod end within the first aperture, and a second retaining cap configured to affix to the second rod end, abut the end assembly when affixed to the second rod end, and retain the second rod end within the second aperture.

A hydraulic system for a vehicle is provided. The hydraulic system includes a first electric motor, a second electric motor, a gearbox arranged to be driven by the first and second electric motors, a hydraulic pump arranged to be driven by the gearbox, and a control arrangement configured to individually control the first and second electric motors to either run at a reference speed or to deliver a reference torque and during operation control at least one of the first and second electric motors to deliver a reference torque.

Apparatus and associated methods relate to using an electro-hydraulic solenoid valve to provide regulation of fluid displacement of a variable-displacement hydraulic pump. A mechanical control mechanism is configured to control displacement of hydraulic fluid pumped from a hydraulic input port to a hydraulic output port. The electro-hydraulic solenoid valve regulates fluid conductivity between a hydraulic output port of the variable-displacement hydraulic pump and a hydraulic control cylinder, which operates a hydraulic control piston coupled to the mechanical control mechanism controlling fluid displacement. An electronic control unit is configured to generate and transmit an electrical control signal to the electro-hydraulic solenoid valve in response to a metric of the variable-displacement hydraulic pump as measured by a transducer. The electronic control unit generates the electrical control signal so as to control the metric measured to within a predetermined control band about a target value.

This construction machine is provided with: a flow rate control valve as a hydraulic device that adjusts the flow rate supplied to a hydraulic cylinder that drives a work device; and a control device that controls the hydraulic cylinder so as to satisfy the condition that the work tool moves without exceeding the target surface. The control device calculates a target speed of the hydraulic cylinder at which the work tool satisfies the condition on the basis of information on the target surface and detection information from a detection device that detects the orientation of the work device, and controls the work tool when the target value of the hydraulic device corresponding to the calculated target speed is less than a lower limit value at which the accuracy of flow control can be ensured. On the basis of the limited speed of the hydraulic cylinder obtained from the lower limit value, a target speed of the hydraulic cylinder at which the work tool satisfies the condition is re-calculated, and the hydraulic device is controlled by a target value corresponding to the re-calculated target speed.

The passenger car pneumatic motor system comprises an air compressor, an air storage tank and an air using module, the air compressor is connected with the air storage tank and the air using module through a distribution valve set and supplies air to the air storage tank and the air using module, a distribution valve is connected with a plurality of pneumatic motors, and the pneumatic motors are used for driving a vehicle-mounted execution module to work. A power source used for driving the executing mechanism to operate is replaced by the pneumatic motor from a common electric motor, the vehicle-mounted air supply unit is used for supplying air to the pneumatic motor, on one hand, compared with the electric motor, the pneumatic motor can achieve system control through a simple flow control valve, a complex electronic control system does not need to be arranged, and the cost is reduced. The structure is simpler, the subsequent maintenance cost is lower, the purchase cost is also reduced compared with that of an electric motor, the cost for operating the execution unit can be effectively reduced, and the requirement for light weight of the vehicle is better met; and on the other hand, the multiple executing mechanisms can share one gas supply unit, the utilization rate of the gas supply unit is increased, and the applicability is high.

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 application discloses a kind of adjustable servo motor test loading system, and relates to a kind of motor load testing device.The purpose is to overcome the problems that existing servo motor test loading device system cannot meet the needs of servo motor performance test at any time under different working conditions, comprising: oil tank is communicated with main oil pump, and main oil pump is communicated with the second inlet of reversing valve through low-pressure pressure reducing valve at the same time; it is communicated with the first inlet of reversing valve by high-pressure pressure reducing valve; the first outlet and the second outlet of reversing valve are respectively communicated with the inlet of rack and pinion oscillating hydraulic cylinder two ends; first side adjusting overflow valve and second side adjusting overflow valve are connected between reversing valve and rack and pinion oscillating hydraulic cylinder; the power output shaft of rack and pinion oscillating hydraulic cylinder is drivingly connected with the power input shaft of test servo motor through transmission unit; torque sensor is used to obtain the torque of the power output shaft of rack and pinion oscillating hydraulic cylinder as load data.

A hydraulic system (12) for an aircraft (10), wherein the hydraulic system (12) includes a hydraulic power pack (14), a hydraulic fluid reservoir (28) and a hydraulic pump (30), a hydraulic consumer (18), a high-pressure supply line (38) supplying the hydraulic consumer (18) with hydraulic fluid under higher pressure, and a low-pressure return line (40) returning hydraulic fluid under lower pressure from the hydraulic consumer (18); heating device (42) with a short-cut line (44) connecting the high-pressure supply line (38) with the low-pressure return line (40) and a heater valve (46) for opening and closing the short-cut line (44), and a control and monitoring unit (43). Temperature management includes automatically controlling a fluid temperature by monitoring the fluid temperature and controlling the heater valve (46).

A self-aligning system within a belt-driven linear actuator that enables a "keyless" or "round profile" piston to be sealed while maintaining an aligning and / or torque resisting ability. Operating piston 204 is affixed to output shaft 106 and provides a structural member for mounting traveling sheaves from both contracting pulley system 206 and expanding pulley system 202. This enables the airspaces within the electromechanical actuator could be pressurized to perform a secondary load holding function that is redundant to the linear screw device.

A dual-redundancy electro-hydrostatic actuator comprises a first motor pump and a second motor pump which are energy assemblies of the electro-hydrostatic actuator; the first motor pump and the second motor pump are respectively provided with a first electromagnetic isolating valve and a second electromagnetic isolating valve which are used for controlling connection and disconnection between the first motor pump and the hydraulic cylinder and between the second motor pump and the hydraulic cylinder; the energy accumulator is an oil supplementing assembly of the electro-hydrostatic actuator, provides stable pressure when the motor pump works at a high speed, and prevents the electro-hydrostatic actuator from sucking air; the one-way valve is located between the energy accumulator and the hydraulic cylinder, the energy accumulator supplies oil to the hydraulic cylinder through the one-way valve, and oil is prevented from reversely flowing back to the energy accumulator; the safety valve plays a role in limiting the maximum pressure of the electro-hydrostatic actuator, and the electro-hydrostatic actuator is prevented from being damaged due to the fact that the pressure exceeds the limit; the sensor is used for judging the working states of the first motor pump and the second motor pump of the electro-hydrostatic actuator, and after signals of the sensor are sent to the controller, the controller achieves fault diagnosis of the motor pumps and triggers updating of system state identifiers.

A composite vessel and fitting for a through-wall penetration having an exposed end grain. The fitting includes a sealing surface arrangement that seals against the composite vessel and prevents leakage of the vessel contents while protecting the end grain from exposure to internal fluid and / or external environment. The fitting includes an outer part, an inner part, and a through-wall part extending between the inner and outer parts across the penetration. An outer seal arrangement includes an outer seal having a first sealing surface that seals against the outer surface of the composite vessel to restrict environmental contaminants migrating to the end grain. An inner seal arrangement includes at least one inner seal having second and third sealing surfaces. The second sealing surface seals against the inner surface of the composite vessel and the third sealing surface seals a leak path or interface between the inner part and through-wall part to restrict internal fluid migrating to the end grain.

Hydraulic system and vehicles and containers having such a hydraulic system. The hydraulic system has at least two supporting cylinders for extending ground supports, and at least two hydraulic pumps connected to a hydraulic main line, and at least one supporting cylinder is provided on each of the two hydraulic main lines. The hydraulic system also has a main valve via which the two hydraulic main lines can be connected to one another or disconnected from one another.

Embodiments of a lift apparatus and system are disclosed herein, the system including a support and at least one lift apparatus to move a substrate between the support and a transfer plane using a servo control system. Methods for servo control of a lift apparatus and lifting a substrate off of or lowering a substrate onto a support are also disclosed herein.