27 results about "Hydraulic pump" patented technology

The invention discloses an electric static liquid actuator for deep sea. An integrated-type integrated structure is adopted. The movement of a hydraulic cylinder is controlled by a two-way hydraulic pump. The forward and reverse of a motor is adjusted and controlled, and the displacement and accelerated speed of a piston rod of the hydraulic cylinder are controlled through speed regulation operation; and a hydraulic direction-changing valve, a reducing valve and other control valves are cancelled, and an arranged sensor monitors and adjusts the working condition of a system. A pressure compensator is arranged outside the system and used for compensating system pressure and adapting high pressure environment of the deep sea. A hydraulic circuit adopts a plate-type connection without external connection pipelines, only an interface for power supply and signal transmission is arranged on the exterior of the hydraulic circuit, the advantages of a hydraulic actuating system and an electricactuating system are both had, system composition is simplified greatly, and the equipment volume is greatly reduced. Therefore, the electric static liquid actuator for the deep sea has a wide application prospect in deep-sea operating equipment and shipping equipment.

A continuously variable transmission (1) for transmitting a driving force of an engine (VE) to a load (DW) to be driven, in particular in a vehicular drive line, provided with two hydraulic pumps (10, 11) for realising a pressurised supply of hydraulic transmission fluid for the actuation of the transmission (1), whereof a first pump (10) is driven by the engine (VE) and whereof a second pump (11) is driven by an electric motor independently from the engine (VE), and with a main hydraulic line (13), an auxiliary hydraulic line (15) and a line pressure valve (14) that control a pressure (Pline) in the main line (13) by allowing a surplus of transmission fluid to flow from the main line (13) into the auxiliary line (15), wherein the first pump (10) is connected to the main line (13) and wherein the second pump (11) is connected to the auxiliary line (15).

The invention discloses a positive-and-negative pressure driving device for a mounting tool of a cold shrinking cable sealing cap. The positive-and-negative pressure driving device consists of an engine body, a hydraulic pump component, a negative-pressure output component and an adjustable pressure-limiting valve, wherein a pedal is mounted outside the engine body; the hydraulic pump component consists of a piston pump and an oil tank, and the piston pump is driven by the pedal; the negative-pressure output component comprises a hydraulic negative-pressure cylinder, the input end of the hydraulic negative-pressure cylinder is connected with the piston pump and also connected with the oil tank through a valve I, the output end of the hydraulic negative-pressure cylinder is connected with a negative-pressure output joint and also connected with a gas inlet through a valve III, and the hydraulic negative-pressure cylinder is driven by hydraulic oil to output negative pressure; the input end of the adjustable pressure-limiting valve is connected with the piston pump, the output end of the adjustable pressure-limiting valve is connected with a hydraulic oil output joint and also connected with the oil tank through a valve II, and the adjustable pressure-limiting valve is used for ensuring that the piston pump preferably provides hydraulic oil for the hydraulic negative-pressure cylinder. The structure of the positive-and-negative pressure driving device is simplified, and the total equipment cost and the failure rate are lowered; the positive-and-negative pressure driving device finishes the operation mainly by foot stepping, the mounting efficiency of the cold shrinking cable sealing cap is improved, and the positive-and-negative pressure driving device is compact in structure, convenient to carry and flexible in use.

The invention discloses a water tightness test device and belongs to the field of test devices. The water tightness test device comprises a watertight storage tank housing, a loading oil cylinder used for providing a loading force, a pulley, a mounting seat used for mounting a tested winch and the loading oil cylinder, and a closed connecting rope, wherein one end of the closed connecting rope is sleeved with the pulley; the pulley is mounted at the telescopic end of the loading oil cylinder; the loading oil cylinder is mounted on the mounting seat; the mounting seat is arranged on the bottom surface in the watertight storage tank housing; a water source inlet is formed in the watertight storage tank housing; the watertight storage tank housing comprises an upper half watertight storage tank and a lower half watertight storage tank which are hermetically connected; a connector flange is arranged at the bottom of the lower half watertight storage tank; a hydraulic pipeline of a hydraulic pump station penetrates through the connector flange to be connected with the loading oil cylinder. According to the test device, a pressure is provided by the loading oil cylinder and transmitted to a winding barrel through the pulley and the closed connecting rope so as to test the water tightness of the tested winch in positive and negative directions and at different rotating speeds.

The present disclosure comprises a compact, sound recording equipment stand, which further comprises a support base, a microphone, a monitor, a sound filter, speakers, a tactile input and lighting source. The stand may additionally comprise a hydraulic pump for raising and lowering various pieces of attached components. In the preferred embodiment, the monitor is built inside a transparent sound filter, placed slightly above head level of an artist. The other components of the stand may similarly be covered in material to maximize sound absorption.

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.

The invention relates to a permanent-magnet separator for separating harmful heavy metal in soil. The permanent-magnet separator comprises a stander, hydraulic pumps, a plurality of permanent magnets and a material containing basin. The permanent-magnet separator is characterized in that a lifting plate is together supported by the hydraulic pumps on the stander, respectively, wherein the permanent magnets are designed on the lifting plate; a casing plate is fixed on the stander among the hydraulic pumps by virtue of a connector, a plurality of nonmagnetic metal casings are designed on the casing plate, and one permanent magnet is movably connected in each cashing pipe; the movable material containing basin is arranged at the bottom of the stander. Compared with the prior art, the permanent-magnet separator has the advantages that the structure is simple and scientific, the harmful heavy metal in the soil can be separated, and the permanent-magnet separator can be used for effectively separating the harmful heavy metal from the soil, the purposes of improving the soil, benefiting the environmental protection and the body health of people, realizing the utilization of waste and turning the waste into wealth are achieved, and the permanent-magnet separator is suitable for processing the soil severely polluted by heavy metal.

The invention discloses stirring and emulsifying equipment for preparing energy-saving color paste. The equipment comprises a supporting table. Fixed bases are symmetrically arranged on two sides of the supporting table; hydraulic oil tanks are mounted in the two fixed bases; hydraulic pumps are connected above the two hydraulic oil tanks; hydraulic cylinders are mounted above the two fixed bases; and supporting table columns are fixedly connected above the two hydraulic cylinders. By arranging an oblique baffle plate and a stirring paddle, the baffle plate body can rotate through a connecting shaft, so that the acting force between centrifugal extrusion and impact of materials can be improved effectively, severe mechanism and hydraulic shearing, liquid layer friction and impact tearing are formed among the materials, and dyed materials can be fully dispersed, emulsified, homogenized and crushed, and meanwhile, the bottom stirring paddle can stir printed color paste falling to the bottom, so that the printed color paste can be stirred uniformly.

The invention discloses an electric hydraulic power steering system, comprising a vehicle controller, a variable frequency controller, a motor, a hydraulic pump, a liquid storage tank and a steering gear; the vehicle controller, an energy storage mechanism and the motor are respectively and electrically connected with the variable frequency controller, the motor is in transmission connection with the hydraulic pump, an oil inlet of the hydraulic pump is connected with the liquid storage tank through a pipeline, an oil outlet of the hydraulic pump is connected with the steering gear through a pipeline. Further provided is a control method of the electric hydraulic power steering system. According to the electric hydraulic power steering system and the control method thereof, steering assistance is changed, energy can be saved, flexible steering can also be guaranteed for low-speed running of a vehicle, and the vehicle is steered stably during high-speed running.

The invention discloses a timber drying furnace, which comprises a furnace body, and a flue connected with the burning chamber and the fume outlet of the furnace body. The flue is fixed outside the furnace body, a heat conducting oil interlayer communicated is arranged on the flue and the furnace body, an expansive oil pipe connected with atmosphere is arranged in the heat conducting oil interlayer to be used for a hydraulic pump cycled by the heat conducting oil in the heat conducting oil interlayer; the heat conducting oil is adopted as a medium, the higher drying temperature can be obtained, and the temperature is easy to be controlled, the drying time is greatly saved, because an open mouthed water collecting sump is arranged outside the heat conducting oil interlayer, the water quantity can be increased and reduced according to the demand, thereby controlling the humidity of the hot air blast, and ensuring that the drying timber is free from the crack, the deformation and the discolor, the drying is even, the product quality is improved, when the heat quantity passes through the flue, the heat conducting oil in the flue interlayer can be completely absorbed, thereby fully utilizing the heat quantity, therefore the acceleration speed is improved, the thermal efficiency is high, and the fuel material is saved.

The invention discloses a squeezing safety and automatic alarm device of a diaphragm filter press. According to the device, a PLC (Programmable Logic Controller) is arranged to automatically control the operation; a digital display pressure controller is arranged on an oil cylinder body of a hydraulic system; an intelligent pressure transmitter is arranged on a diaphragm squeezing water pipeline;the digital display pressure controller and the intelligent pressure transmitter are connected with the PLC; a pressure switch is connected with the intelligent pressure transmitter; a text display device is connected with the PLC; a buzzer alarm is connected with the PLC; a squeezing pump switch is connected with the intelligent pressure transmitter; a hydraulic pump switch is connected with thedigital display pressure controller; the digital display pressure controller is installed on the oil cylinder body of the hydraulic system; and the digital display pressure controller is provided witha pressure contact lower limit, a pressure contact upper limit and a pressure contact ultimate upper limit. According to the invention, the use safety of the whole equipment of the diaphragm filter press is ensured, a burst accident is avoided during squeezing of a diaphragm filter plate, the safety of personnel on a working site is ensured, and the economic benefit is improved.

The invention relates to a ground conveyor with a working hydraulic apparatus, which is powered by a hydraulic pump (33) with pressure medium, wherein the hydraulic pump (33) is driven by an electric pump motor (32). The electric pump motor (32) is provided with a stator having an armature winding (8) and field magnet means, and a rotor (1) of high-permeability soft magnetic material, wherein the armature winding has a pitch proportional to the number of pairs of stator poles (6) of the stator (5), and the field magnet means is used for forming a magnetic flux in the rotational direction by an angle deviating with respect to a magnetic field of the armature winding (8), in particular by 90 DEG when the stator (5) has four stator poles (6), and wherein the rotor has rotor poles (4) with low magnetic reluctance in the orientation of the rotor poles (4).

The invention discloses a small liquid cooling system driven by electro-hydraulic micropumps and a method. The system comprises a liquid cooling block filled with liquid working fluid and a heat exchanger filled with liquid working fluid. An outlet of the heat exchanger is connected with an inlet of the liquid cooling block through a first loop pipeline. A first electro-hydraulic micropump is connected into a pipe of the first loop pipeline in series. An outlet of the liquid cooling block is connected with an inlet of the heat exchanger through a second loop pipeline. A second electro-hydraulic micropump is connected into a pipe of the second loop pipeline in series. The liquid cooling system not only solves the high-efficiency cooling problem of a large power electronic device, but also overcomes the defects of conventional mechanical pumps, such as large sizes, high power consumption, large noise, inaccurate flow control, etc. The system has advantages such as no moving parts, reliable operation, low power consumption, easy manufacturing and no need for maintenance. The system can be integrated with chips or channels directly and does not need independent space. The system can be applied to electronic cooling, drug transportation, micro-electro-mechanical system and other fields.

A gradual transmission for automobiles, industrial devices, and other appliances requiring a continuously gradual torque, which includes: a hydraulic pump connected to the output shaft of a combustion engine or any other motive power supply, for providing a hydraulic pressure to a hydraulic motor which is also connected to the driving wheels of a vehicle or optionally to any industrial equipment. The resultant torque transmission can be manually operated, or controlled by any other automatic device.

A drive device for construction equipment according to the present invention comprises: a first pump flow path that is connected to a first hydraulic pump; a first supply flow path and second supply flow path that are connected to the first pump flow path; a first branch flow path and a second branch flow path that are connected to the first supply flow path; a third branch flow path and a fourth branch flow path that are connected to the second supply flow path; a first main controlled valve that is connected to the first branch flow path and the third branch flow path; a second main controlled valve that is connected to the second branch flow path and the fourth branch flow path; a first bucket flow path that is connected to the first branch flow path via the first main controlled valve, and to the cap-side space in the bucket cylinder; a second bucket flow path that is connected to the third branch flow path via the first main controlled valve, and to the rod-side space in the bucket cylinder; a first arm flow path that is connected to the second branch flow path via the second main controlled valve, and to the rod-side space in the arm cylinder; and a second arm flow path that is connected to the fourth branch flow path via the second main controlled valve, and to the cap-side space in the arm cylinder.

The invention discloses a field slotting machine, which comprises a driving device, a walking frame, a slotting device, several wheels, a hydraulic pump, and a stretching rod. The notching device includes a fixed frame and several notch grinding tools with the same shape. The notch grinding tool includes a lower notch and an upper baffle. There are notch grinding tools under both sides of the walking frame, and among the plurality of notch grinding tools, 2 notch grinding tools are respectively located on both sides of the fixed frame, and the 2 notch grinding tools are respectively Be on the same straight line with the wheels evenly positioned under the walking frame. The field slotting machine provided by the invention is simple to prepare, and the obsolete rice transplanter is refitted, and the original mechanical claws are replaced with the slotting device, which can achieve the purpose of fully utilizing resources, utilizing waste, and saving resources. At the same time, the wheels are set on the same straight line as the notch grinding tool. During use, the crops pressed by the wheels will be grooved immediately. The setting is reasonable and will not cause waste of crops.

The invention discloses a hydraulic driving system for a notching machine. The hydraulic driving system comprises a first hydraulic pump (6), a second hydraulic pump (5), a three-position four-way reversing valve (17), a three-position four-way reversing valve (18.1), a three-position four-way reversing valve (18.2), a clamping cylinder (22) and a notching cylinder (21), wherein the first hydraulic pump (6) is connected to a first oil port of the three-position four-way reversing valve (17); the second hydraulic pump (5) is connected to a second oil port of the three-position four-way reversing valve (17) and a first oil port of the three-position four-way reversing valve (18.1); and a third oil port of the three-position four-way reversing valve (17) is connected to the first oil port of the three-position four-way reversing valve (18.1). The hydraulic driving system performs a clamping action and a notching action with large applied force and small applied force through two hydraulic pumps and 3 to 4 three-position four-way reversing valves, and has the advantages of simple structure and reliable actions.

The invention provides a plant protection machine which comprises an engine. The plant protection machine is characterized in that the engine is connected with a hydraulic pump, the hydraulic pump is connected with a hydraulic motor, and the hydraulic motor is connected with an executive component. The hydraulic pump and the hydraulic motor are used for transferring the power of the engine, and power output is stable. The plant protection machine has the advantages of being simple in structure, low in cost, flexible in machine usage and high in operating efficiency.

The invention provides high-efficiency and high-precision quartz glass tube forming equipment, which comprises a press machine, a pressing column is arranged at the upper end of the press machine in a sliding mode, a base is installed at the lower end of the press machine, a mold is installed at the upper end of the base, a folding mechanism capable of improving precision and a transmission mechanism for recycling molten glass through thermal expansion and cold contraction are arranged on the inner side of the mold, a hydraulic pump is installed at the upper end of the press machine and matched with a pressing column, the pressing column and the mold are vertically and correspondingly arranged, a groove is formed in the lower end of the pressing column, the pressing column is vertically embedded into the mold, after molten glass enters the sleeve, due to the thermal expansion and cold contraction principle, an air bag is wholly expanded, the left side and the right side of the air bag are attached to the inner wall of a flow guide frame, the upper end and the lower end of the air bag expand and extend, the air bag can drive a push rod to slide downwards, the push rod drives a rotating disc to rotate, and when the rotating disc rotates, the molten glass is driven by a blade to enter a pipeline, so that the effect of promoting the rapid flowing of the molten glass is achieved.

In a self-propelled construction machine (1), in particular road milling machine, comprising a machine frame (8), at least three travelling devices (12, 16), wherein at least one of the three travelling devices (12, 16) is realized as a pivotable travelling device (16) so that said travelling device (16) is pivotable about at least one vertical pivoting axis in relation to the machine frame (8) between a first pivoted-in and at least one second pivoted-out position, at least one working device (20), in particular a milling drum, for working the ground pavement (3), at least one hydraulic drive system (70) for driving at least two travelling devices (12, 16), wherein at least one of the at least two driven travelling devices is the pivotable travelling device (16), wherein the hydraulic drive system (70) comprises at least one hydraulic pump (78), it is provided for the following features to be achieved: the hydraulic drive system (70) comprises one each hydraulic variable displacement motor (72) for driving the driven travelling devices (12) with the exception of the at least one pivotable travelling device (16), wherein the hydraulic drive system (70) comprises a hydraulic fixed displacement motor (74) for driving the at least one pivotable travelling device (16).