22 results about "Hydraulic control" patented technology

A lubricating system for a heavy-duty material processing shears provides lubricant to one of more wear surfaces on one or more wear portions in the shears. The system includes a hydraulic lubricant pump that is actuated by the main hydraulic control system by means of which the jaws of the shears are opened and closed, and may include a sequential valve to distribute lubricant to various wear portions in sequential fashion. The lubricating system may lubricate one or more wear surfaces of the lateral blade stabilizers, primary and secondary blade(s) on the upper and/or lower jaws, pivotal connections between jaws and/or between the upper jaw and the hydraulic cylinder, a forward wear plate, or any other wear portion of the shears. The lubricating system may be retrofitted onto a conventional non-lubricated shears by replacing a conventional upper jaw with an upper jaw with lubricant conduits and a lubricating system.

The invention relates to a telescopic control valve, a multi-stage telescopic hydraulic system and a hoist jib telescopic hydraulic control system. The telescopic control valve comprises a valve body, wherein a first oil port and at least two second oil ports are formed in the valve body, oil passing ways are connected between the first oil port and the at least two second oil ports, on-off valves are arranged on all the oil passing ways, a control oil port of each on-off valve is connected with a control oil source by the aid of a reversing valve, selection of all the on-off valves can be realized through reversing by the reversing valves, and then the oil passing ways are connected or disconnected. The telescopic control valve is provided with the first oil port, the second oil ports, the reversing valves and the on-off valves, and the different oil passing ways can be connected or disconnected through reversing by the reversing valves. For a multi-stage telescopic hydraulic system, a cylinder rod corresponding to one selected oil way can be controlled to extend or retract, and other oil ways are cut off, so that action of the cylinder rod cannot be affected, and independent control on each stage of cylinder barrel is realized.

A transmission controller determines whether a shift returning to low, changing a speed ratio of a continuously variable transmission to the lowest when a vehicle decelerates, is being performed or not, calculates a primary pressure measured lower limit value at which a belt begins to slip actually, based on a deceleration of the vehicle and the speed ratio of the continuously variable transmission, and sets a lower limit value of a target value of the primary pressure during the shift returning to low as the primary pressure measured lower limit value.

The invention relates to a hydraulic control system, in particular to a novel hydraulic control system for a combine harvester. The novel hydraulic control system for the combine harvester mainly solves the technical problems that when multiple valves are simultaneously operated by a hydraulic system of existing combine harvester operating mechanisms in the prior art, the largest output pressure of a pump can exceed the ultimate pressure which can be borne by the system, the hydraulic pump and pipelines are extremely prone to damage, the actual flow requirement differences of the operating mechanisms are large, a working pump always supplies full flow to each reversing valve, thus the flow requirements of the operating mechanisms can not be satisfied at the same time, and the controllability is poor. The novel hydraulic control system for the combine harvester is composed of a double-way slide valve, a straw shifting wheel one-way slide valve and a grain unloading one-way slide valve. The double-way slide valve is connected with a header cylinder, a left steering cylinder and a right steering cylinder through the pipelines. The straw shifting wheel one-way slide valve is connected with a straw shifting wheel cylinder through one pipeline. The grain unloading one-way slide valve is connected with a grain unloading cylinder through one pipeline. Oil return ports of the double-way slide valve, the straw shifting wheel one-way slide valve and the grain unloading one-way slide valve are connected in parallel.

A comparison determination unit of a hydraulic control device determines whether a characteristic abnormality occurs in at least one hydraulic sensor of an output pressure sensor and a lateral pressure sensor by comparing an output pressure detected by the output pressure sensor and a lateral pressure detected by the lateral pressure sensor. An individual determination unit determines whether the characteristic abnormality occurs in the hydraulic sensor as a determination target by individually determining whether the output pressure and the lateral pressure are out of a predetermined range. A characteristic abnormality detection unit determines the hydraulic sensor in which the characteristic abnormality occurs by using each determination result in the comparison determination unit and the individual determination unit.

The invention discloses an intelligent digital hydraulic-control four-roller reversing finishing mill. A mainframe base, a left taking-up frame base and a right taking-up frame base are integrally connected and arranged in an integral foundation. A motor, a combined gearbox, an upper working roller and a lower working roller sequentially connected with one another are arranged on a mainframe. Sockets for installation of bearings are arranged on four corners of a bearing seat, shaft sleeves of the working rollers are arranged in the bearing seat, the outer circumferential surfaces of the shaft sleeves of the working rollers are tangent to the outer circumferential surfaces of the four bearings, and the ends of the working rollers are arranged in the shaft sleeves of the working rollers. An X-ray thickness gauge for feeding material and an X-ray thickness gauge for discharging material are arranged on the outer sides of the upper working roller and the lower working roller respectively. A digital screwdown cylinder, the X-ray thickness gauge for feeding material and the X-ray thickness gauge for discharging material are respectively connected with a hydraulic-control device controlled by a central control computer. The intelligent digital hydraulic-control four-roller reversing finishing mill is simple in structure, high in precision and fine in stability.

The invention discloses an integrated monitoring system for a power station steam turbine electric hydraulic control system based on a Modbus protocol, which relates to an automatic control system for generating station unit equipment and particularly relates to a Modbus protocol-based power station equipment DCS (Distributed Control System) integrated monitoring system. The system of the invention is composed of a steam turbine electric hydraulic control system, a unit DCS control system and a data communication network, wherein the data communication network comprises an EHCS (Electric Hydraulic Control System)-side communication interface station and a DCS-side communication interface card; the EHCS-side communication interface station is interconnected with the DCS-side communication interface card via a serial converter. Data communication is realized through the Modbus protocol, the unit DCS control system executes a monitoring operation process on the steam turbine electric hydraulic control system through an operator station, monitoring and operation on all important parameters and equipment of the steam turbine electric hydraulic control system are completed, the training workload and the maintenance workload of an operator can be greatly reduced, and the technical problems of not high information and data sharing degree between the power station steam turbine electric hydraulic control system and the unit DCS control system which are mutually independent and have different regulations and low system integration degree can be solved.

The embodiment of the invention discloses an electro-hydraulic control pressure shutoff system used for a hydraulic support vertical column. The electro-hydraulic control pressure shutoff system comprises a liquid inlet main pipeline, a liquid returning main pipeline, a pressurizer, two hydraulic control one-way valves, two hydraulic control two-position three-way reversing valves and two electromagnetic reversing valves. The liquid inlet main pipeline comprises a first branch and a second branch; the liquid returning main pipeline comprises a third branch and a fourth branch; the first branch is connected with inlets of the two electromagnetic reversing valves; emittings of the two electromagnetic reversing valves are connected with control openings of the two hydraulic control two-position three-way reversing valves; oil returning openings of the two electromagnetic reversing valves are connected with the third branch; the second branch is connected with inlets of the two hydraulic control two-position three-way reversing valves; oil returning openings of the two hydraulic control two-position three-way reversing valves are connected with the fourth branch; and an emitting of the pressurizer used for being connected with an annular cavity. The embodiment of the invention discloses an electro-hydraulic control pressure shutoff method used for the hydraulic support vertical column. By utilizing the electro-hydraulic control pressure shutoff system and method used for the hydraulic support vertical column, the disassembling efficiency of a middle cylinder guide sleeve can be improved.

The invention discloses a track harvester hydraulic control system and a control method, and solves the problem of unreliable steering of a paddy machine due to incapability of realizing a steering priority function by a traditional multi-way valve. The track harvester hydraulic control system comprises a main oil inlet, an oil return port, a control valve and a work valve; the control valve comprises a control reversing valve and a priority valve; the control reversing valve is provided with a first position, a second position and a third position; and when the control reversing valve is positioned in the first position and the third position, pressure oil in an oil inlet of the priority valve enters a right side spring cavity of the priority valve through a first throttling hole to cooperate with pressure oil in the oil inlet of the priority valve selected by a left side control cavity of the priority valve for controlling the position of a valve rod of the priority valve. The control method comprises the following steps: when the steering oil cylinder and the work valve are acted, the reversing valve and the priority valve are controlled to realize steering priority actions. Thetrack harvester hydraulic control system has the advantages of simple structure, convenience to assemble, reliable action, long service life and the like.

The invention provides a solid waste squeezing-out machine. The solid waste squeezing-out machine comprises a lower cavity (1), an upper cavity (2), a roller shaft coupler (4), an electric motor (10)and a control system (21). The lower cavity (1) and the upper cavity (2) are in fastened connection, the electric motor (10) is connected with the lower cavity (1) through the roller shaft coupler (4), the control system (21) is electrically connected with the electric motor (10), a speed reducer (7) and a speed reducer coupler (6) are further included, the speed reducer (7) is arranged between the roller shaft coupler (4) and the electric motor (10), and the speed reducer (7) is connected with the roller shaft coupler (4) through the speed reducer coupler (6). The solid waste squeezing-out machine is reasonable in structure and convenient to operate. A transmission device is compact in structure, and flexible in running, and full-automatic hydraulic control and remote control are achieved.

The invention relates to a gearbox of a loader. The gearbox comprises a split gearbox body and a hydraulic torque converter. A hydraulic torque converter output flange and a gearbox body input flange are connected through a universal joint, a transmission structure in a box body is reconstructed, the split torque converter matched with the transmission structure is designed, meanwhile, an operation gear is simplified to be a three-advancing one-retreating manner, and a hydraulic control pilot valve is used for control. The gearbox can be matched with high-power engines, and reasonable output torque can be obtained.

The invention provides an intelligent control system for a hydraulic vibrating impacter. The intelligent control system comprises a vibrating impacting cylinder, a vibrating main shaft and a conical vibrating impacting head. The vibrating impacting head is fixedly connected with the vibrating main shaft. A hydraulic motor for driving the vibrating main shaft to rotate is arranged in the vibrating impacting cylinder. The hydraulic motor is connected with a high-pressure oil pipe. An eccentric block set is connected to the outer side of the vibrating main shaft. The upper end of the vibrating main shaft is connected with the vibrating impacting cylinder through an upper bearing set, and the lower end of the vibrating main shaft is connected with the vibrating impacting cylinder through a lower bearing set. The intelligent control system further comprises an electrical control system and a hydraulic control system. The hydraulic control system comprises a proportional valve set, a torque rotating speed sensor, a pressure sensor, a first displacement sensor, a temperature sensor, a second displacement sensor and a liquid level sensor, and thus visual human-computer interface communication can be used more completely.

An excavator hydraulic control system and method, relating to the technical field of excavator hydraulic control, including a LUDV load sensing valve, a control unit, a preset number of gear pumps, and two-position three-way electric control valves corresponding to the gear pumps one by one; The oil inlet of the two-position three-way electric control valve is connected to the oil outlet of the corresponding gear pump, and the two oil outlets of the two-position three-way electric control valve are respectively connected to the oil inlet of the LUDV load sensing valve. Each two-position three-way electric control valve is respectively connected to the control unit. The LS port of the LUDV load sensing valve is connected to a pressure sensor, and the pressure sensor is connected to the control unit. The control unit is divided into three The two-position three-way electric control valve is controlled in two stages. This excavator hydraulic control system and method have different flow rates under different pressures, thus solving the problem of energy loss due to the overflow of the overflow valve in the traditional excavator hydraulic control system and method. The problem.

The invention discloses a high energy-saving and low-consumption hydraulic oil pumping device, which mainly comprises a walking beam, a cross beam bearing of the walking beam, a cross beam, a connecting rod, a counterweight, a connecting-rod bearing, a connecting lever, a pedestal and a connecting-lever bearing, and is characterized in that the connecting lever is connected to the connecting-rod bearing; the other end of the connecting lever is connected to the pedestal connecting-lever bearing which is arranged on the prior pedestal; a connecting top beam is arranged in the middle of the connecting lever; the lower end of the top beam is connected with a hydraulic cylinder and a hydraulic cylinder telescopic rod which are arranged on the pedestal, and a moving rod and a top cylinder bearing; the pedestal is connected with a righting slide rail and the pedestal bearing of the hydraulic cylinder; a righting slider of the righting slide rail is fixed on the hydraulic cylinder telescopic rod; and an inlet and an outlet of the hydraulic cylinder are connected with a hydraulic control station. The high energy-saving and low-consumption hydraulic oil pumping device adopts a hydraulic device, has low power, energy consumption, workload and strength, is convenient to assemble, use and maintain, and is widely applied to the oil extraction technology of an oil field.

The invention discloses a large-dip-angle trash rack one-time forming suspension type sliding formwork and a construction method. The large-dip-angle trash rack one-time forming suspension type sliding formwork comprises a formwork body system and a suspension system; the formwork body system comprises trash rack-shaped formworks formed by splicing panels, and reinforcing ribs and supporting trusses are arranged between the formworks; a working platform is laid on the upper surface of the formwork body system; a hydraulic control system is arranged on the working platform; the suspension system comprises a suspension supporting frame of a truss structure, and the suspension supporting frame is fixed to a trash rack upper platform through anchor bars and steel supports; a plurality of groups of suspension pull rods are connected below the suspension supporting frame; the bottom ends of the suspension pull rods are connected with a truss of the formwork body system through hydraulic jacks; the suspension angle of the suspension pull rods is consistent with the inclination angle of the trash rack; a concrete conveying system is arranged above the formwork body system along the installed steel bars and the installed rails; and a defect elimination maintenance system is connected below the formwork body system. The large-dip-angle trash rack one-time forming suspension type slidingformwork has the characteristics that steel bars are bound in place at a time, grid grooves and rails are installed at a time, second-stage concrete construction is omitted, and one-time forming is achieved through a suspension type sliding formwork.

The invention discloses a novel mechanical-hydraulic control triaxial creep testing machine, which comprises an upper force bearing plate, a middle plate and a lower force bearing plate, wherein a plurality of upper stand columns are arranged between the upper force bearing plate and the middle plate, and the two ends of each upper stand column are connected with the edge of the upper force bearing plate and the edge of the middle plate respectively; a plurality of lower stand columns are arranged between the middle plate and the lower force bearing plate, and the two ends of each lower standcolumn are connected with the edge of the middle plate and the edge of the lower force bearing plate respectively; a pressure chamber base is fixedly connected to the middle of the upper surface of the middle plate, a pressure chamber end cover is arranged above the pressure chamber base, a pressure chamber cylinder is arranged between the pressure chamber base and the pressure chamber end cover,and the pressure chamber base, the pressure chamber end cover and the pressure chamber cylinder form closed space; an axial oil cylinder is fixedly arranged on the lower force bearing plate, a push rod of the axial oil cylinder is vertically upward and connected with a lower force transmission column, the lower end of the lower force transmission column is connected with the push rod of the axialoil cylinder, and the upper end of the lower force transmission column extends upwards and sequentially penetrates through the middle plate and the pressure chamber base.

A reversing mechanism for a reciprocating pump with overload protection, belonging to the technical field of hydraulic control, the reversing mechanism includes a left working cylinder end cover, a right working cylinder end cover, a push rod, an induction push rod, a sliding sleeve, an overload protection sleeve, an induction The block and the proximity switch are connected; the structure of the invention is simple and the working principle is clear. The structure not only adopts the combination structure of the induction push rod and the push rod, but also adds an overload protection structure, which increases the stability and safety performance of the reversing and prolongs the The service life of the reversing mechanism and the working efficiency of the equipment have been further improved.