25 results about "Oil pressure" patented technology

The invention provides an adaptive variable compression engine piston, relating to an engine piston. The invention is characterized in that the piston is composed of a gas mixture combustion pressure control piston lifting system, an oil filling system and a cooling system, wherein the gas mixture combustion pressure control piston lifting system comprises an upper oil chamber (4) consisting of apiston shell (1) and an upper oil pressure piston (2) and a lower oil chamber (28) consisting of the piston shell (1) and a lower oil pressure piston (17); the oil filling system comprises a connecting rod internal oil duct (22), a connecting rod small end oil groove (21), a piston pin internal oil duct (25), a piston lower support internal oil groove (27) and an oil filling check valve (16); thecooling system comprises the connecting rod internal oil duct (22), the connecting rod small end oil groove (21) which is communicated with the piston pin internal oil duct (25) and a cooling oil spray hole (24), and a cooling oil duct (8). The piston can be automatically adapted to the compression ratios of the engine under different working conditions and can greatly enhance gas mixture combustion efficiency and torque under medium and low loads.

The invention discloses a high-pressure sealing nitrogen spring lever clamping device. An oil cylinder end cover is installed at the bottom of an oil cylinder body in a sealing mode, an oil cylinder piston is movably installed in the inner cavity of the oil cylinder body, the position between the inner cavity of the oil cylinder body and the large-end portion of the oil cylinder piston is sealed, the extended end of the oil cylinder piston penetrates through the top of the oil cylinder body to be movably connected with a press arm, the position between the extended end of the oil cylinder piston and the top of the oil cylinder body is sealed, the top of the oil cylinder body is movably connected with one end of a connecting rod, the other end of the connecting rod is movably connected with the press arm, and an oil inlet channel is arranged at the top of the oil cylinder body. A nitrogen spring full of nitrogen in the inside is arranged between the large-end portion of the oil cylinder piston and the oil cylinder end cover. The high-pressure sealing nitrogen spring lever clamping device utilizes the high-pressure sealed nitrogen spring to perform propulsion, clamps a workpiece through a hinge mechanism, does not need a power source, achieves pressure maintaining and clamping through the nitrogen spring, is high in stability, free of pollution and large in clamping stroke, saves energy, can adjust the clamping height and is driven to lift the press arm through oil pressure when the workpiece is loosened.

The invention discloses a hydraulic oil filtration system and a hydraulic shovel. The hydraulic oil filtration system comprises a pilot control system and a bypass filtration oil way, wherein the pilot control system is used for guiding and controlling a hydraulic working device (200), the bypass filtration oil way is provided with a bypass filter (3), a pilot pump (1) is placed inside the pilot control system, an oil suction of the pilot pump (1) is connected with a hydraulic oil tank (100), one end of the bypass filtration oil way is connected with the hydraulic oil tank (100), and the other end of bypass oil way is connected on a pilot control oil way between the pilot pump (1) and the hydraulic working device (200). Due to the fact that the bypass filtration oil way is provided with the bypass filter and is connected on the pilot control oil way and the hydraulic oil tank, high-precision and high-efficiency filtration is carried out on hydraulic oil by utilizing of a flow rate and oil pressure of the hydraulic oil on the pilot control oil way, working efficiency is improved, and the structure is simple and stable.

The invention discloses automatic processing equipment for an axle hole. The equipment comprises a frame, a power head, a workpiece clamp, a hydraulic station and an electric control cabinet, and is characterized in that a hydraulic system trunk, a hydraulic charge branch, a hydraulic blocking branch, a hydraulic pushing branch, a hydraulic compaction branch and a hydraulic feed branch, wherein the hydraulic system trunk consists of an oil tank, a filter net, a variable pump, a one-way valve, a stop valve, an oil inlet pipeline and an oil return pipeline; the branches consist of a three-position four-way electromagnetic slide valve, a one-way throttle valve, a two-way oil pressure latching valve, a pressure relay, a charge cylinder, a blocking cylinder, a pushing cylinder, a compaction cylinder and a power head cylinder; the branches and the trunk form a complete hydraulic system of the automatic processing equipment for the axle hole; the frame is fixedly connected with the electric control cabinet, a downhill type sliding rack, a workpiece V-shaped positioning block, hydraulic moving components and drill tools; and each moving component is correspondingly provided with an inductance approach switch.

A hydraulic actuator provided with a hydraulic pump and a hydraulic cylinder unit. The hydraulic pump has a first suction and discharge opening and a second suction and discharge opening and can be reversely operated. The hydraulic cylinder unit is provided with a piston, a sleeve having an inner space partitioned by the piston into a first pressure chamber and a second pressure chamber, and a piston rod connected to the piston and having a front end projecting to the outside of the sleeve. The hydraulic actuator is provided with first piping for interconnecting the first pressure chamber and the first suction and discharge opening, and also with second piping for interconnecting the second pressure chamber and the second suction and discharge opening. When the hydraulic piston is reversely operated, hydraulic pressure is alternately applied to the first and second pressure chambers to vertically move the piston. The hydraulic actuator is further provided with a bypass pipe for interconnecting the first and second piping and also with an accumulator provided in the middle of the bypass pipe and applying back pressure to the first and second pressure chambers. A vibration test device equipped with the hydraulic actuator is also provided.

The invention relates to a die-casting machine with automatic control and protection functions. The die-casting machine comprises a machine frame, an oil pressure device, a motor (2) and an impact device, and further comprises a PLC control machine (3), an alarm and a speed sensor; the PLC control machine (3) is connected with the motor (2), the alarm and the impact device; and the speed sensor is arranged on the impact device and connected with the PLC control machine (3). Compared with the prior art, the die-casting machine is fully automatically controlled through the PLC, is high in flexibility and low in failure rate, and has very strong antijamming capability; the mean free error time reaches tens of thousands of hours or above, and failure overhauling is convenient; the die-casting machine is controlled through DC24V low voltage, and operation is completely free of danger; and a safety grating, the speed sensor and a temperature sensor are arranged, when dangerous actions or potential safety hazards exist, the motor is automatically stopped, the alarm gives an alarm, and accordingly, safety accidents are prevented.

A high-safety oil returning unit for hydraulic elevator is disclosed. The oil is pumped by a pump in oil tank from oil tank into cylinder via a valve for driving the elevator. A flow control valve is arranged on oil delivering pipe for preventing the breaking of oil delivering pipe. A high-safety oil returning tube is arranged to by-pass the flow control valve or between the flow control valve and cylinder.

The invention discloses a converter transformer on-load tap changer top cover deformation protection device, which comprises an oil pressure starting unit and a strain protection unit which are arranged on a converter transformer on-load tap changer top cover, the oil pressure starting unit comprises a high-frequency dynamic oil pressure sensor, the strain protection unit comprises a strain sensor, and a strain monitoring unit is further connected with a tripping unit. The application of the device has an irreplaceable protection effect on reliably and quickly discriminating the plastic deformation of the top cover. The device can reliably operate for a long time, is not influenced by strong electromagnetism and greasy dirt environment, has the advantages of high response speed and high measurement frequency, does not inject harmonic waves into a power system in the operation process, and does not influence the normal operation of primary and secondary equipment in a transformer substation.

The invention discloses a fully automatic oil pressure high-speed precise circular sawing machine, which comprises a machine body, a work table and a servo motor, wherein a support roller mechanism, a material conveying clamp mechanism, a first material jacking mechanism, a linear guide rail, a material pressing mechanism and a second material jacking mechanism are arranged on the work table, a cutter feeding mechanism is arranged under the work table, a hydraulic station mechanism, an automatic circulation water cooling system and a chip discharge mechanism are arranged under the work table, and the hydraulic station mechanism, the automatic circulation water cooling system and the chip discharge mechanism are matched with the cutter feeding mechanism to be used. The fully automatic oil pressure high-speed precise circular sawing machine has the beneficial effects that through the arrangement of the support roller group, the feeding mechanism, the material pressing mechanism and the cutter feeding mechanism, the fully automatic oil pressure high-speed precise circular sawing machine has the effect of a circular sawing machine, in addition, the material jacking mechanisms are respectively arranged on the feeding mechanism and the material pressing mechanism, in addition, a positioning device is also arranged under the work table, in addition, the hydraulic station mechanism, the automatic circulation water cooling system and the chip discharge mechanism which are matched with the cutter feeding mechanism are also adopted, further, the fully automatic oil pressure high-speed precise circular sawing machine has the characteristics of high precision, firm structure, high efficiency, small vibration and the like.

The embodiment of the invention discloses an elastic balance mechanism and an elastic balance type double-acting valve. The elastic balance mechanism may comprise an elastic balance cylinder, a valvecylinder and a power source providing assembly. According to the elastic balance mechanism, when a power source is stable, an elastic piece keeps compressed under the action of the elastic balance mechanism, and a pneumatic valve or an oil pressure valve has normal double-acting opening and closing functions; when the power source is unstable or lost, the elastic piece is expanded immediately under the action of the elastic balance mechanism, and the pneumatic valve or the oil pressure valve is at a fault closing (FC ) position or a fault opening (FO) position; and at the moment, in cooperation with the power-on position and the power-off position of a solenoid valve, the valve can select multiple states such as fault positions of FLC, FLO, EFC and EFO. The elastic balance mechanism in theembodiment can be widely applied to valves such as a stop valve, a butterfly valve, a ball valve, a gate valve and a regulating valve, and is used for coping with the restriction of dangerous workingconditions of air shortage of double-acting valves and the risk of fatigue damage to springs of single-acting valves.

An electronic control unit starts shift initial oil pressure control after the completion of lockup initial oil pressure control when shift control is performed during the performance of lockup control, the electronic control unit starts shift initial oil pressure control after the completion of lockup initial oil pressure control. Besides, the electronic control unit places priority on the shift control and starts the lockup initial oil pressure control after the completion of the shift initial oil pressure control, when the lockup control is performed during the performance of the shift control. Therefore, the shift initial oil pressure control and the lockup initial oil pressure control are prevented from occurring at the same time when the shift control and the lockup control are performed at the same time.

The invention discloses an oil filling device of a vacuum rotating seal pump. The oil filling device of the vacuum rotating seal pump comprises a rotating main shaft and a shaft sleeve, wherein the surface of the rotating main shaft is provided with an annular boss; a sleeve sealing piece is arranged outside the boss; the sleeve sealing piece is positioned between the rotating main shaft and the shaft sleeve; a partial gap is formed in the boss; an oil inlet corresponding to the boss is formed in the shaft sleeve; a ball which is supported by a spring is arranged on the oil inlet; the diameter of the ball is the same as that of the oil inlet; an inclined oil inlet groove is formed in the oil inlet at the lower part of the ball; when the partial gap of the boss is contacted with the ball, the ball is jacked towards the rotating main shaft by the action of the spring, the oil inlet groove of the oil inlet can be communicated with the partial gap of the boss, and lubricating oil is filled in the partial gap of the boss under the action of the pressure of oil in the oil inlet; and when the rotating main shaft rotates by a circle, a trace of lubricating oil enters between the rotating main shaft and the shaft sleeve, and then the aims of automatic oil filling and controllable oil filling amount can be realized.

The invention relates to the technical field of automobile parts and discloses a position sensor of an automatic driving automobile. A sensor comprises a fixing disc, a cam is movably adjusted in themiddle of the front face of the fixing disc, a fixing frame is fixedly connected to the left side of the front face of the fixing disc through a fastening bolt, an induction frame is fixedly connected into the fixing frame, and the right end of the induction frame penetrates through the fixing frame and extends to the right side of the fixing frame. Two symmetrical annular induction rings are fixedly connected to the front face of a cam. Meanwhile, the distance between an induction rod and an annular induction ring is adjusted by utilizing an elastic telescopic part. During cam rotation, it is ensured that at least one induction rod makes contact with the inner side of the annular induction ring, it can be effectively avoided that a camshaft position sensor breaks down due to the fact that the motor control module detects that an exhaust camshaft position actuator electromagnetic valve circuit is continuously opened, it is ensured that the engine oil pressure meets the requirement ofa camshaft adjusting device, and the timing adjusting function is ensured.

The claw connector adopts a new type of lens pad sealing ring. The claw joint is the core of the claw connector and undertakes the heavy responsibility of the entire connection work. The claw joint consists of a top cover, a top cover sleeve, a pressure ring, a claw, an upper The flange and the lens pad seal ring are composed of five parts. The lens pad seal is used in the high-pressure pipeline, which can generate a radial force between the lens pad seal ring and the claw under the internal pipeline pressure; a seal that can seal the external seawater and The composite sealing ring that can withstand the internal oil pressure is composed of a metal lens gasket sealing ring and an O-ring; the base joint needs to be fixed on the pipeline interface of the subsea manifold in advance; the claw joint is carried by the installation tool and can be used on land or The connection is pre-completed on the deck; the flange structure is divided into flange internal structure and flange external structure. The upper flange moves downward to make the sealing surface of the sealing ring contact with the sealing surface of the lower flange, and ensure the sealing surface of the upper and lower flanges. Leave a certain gap between the platforms at the end.

The invention provides rapid erecting equipment. The rapid erecting equipment comprises a base part, an erecting arm, a hydraulic system and a recoil power device. The base part is hinged to the first end of the erecting arm through a first hinge shaft. The hydraulic system comprises a hydraulic control mechanism and a hydraulic cylinder; the recoil power device is arranged on the erecting arm; when the recoil power device works to generate jet flow, the erecting arm rotates around the first hinge shaft in the first direction, and the hydraulic cylinder extends; and in the extension process of the hydraulic cylinder, the hydraulic control mechanism injects oil liquid into a first oil cavity of the hydraulic cylinder to ensure that the first oil cavity is always in a state of being completely filled with the oil liquid. Power provided by the recoil power device can enable the erecting arm and the hydraulic system to be matched to achieve erecting of the erecting arm, and the erecting speed of the erecting arm is guaranteed. The oil pressure in the hydraulic system can be kept at a relatively small value, and the problem that in the prior art, the oil leakage fault occurrence probability of the hydraulic system is increased due to the fact that the oil pressure is too large is solved.