45results about How to "Simplify the hydraulic system" patented technology

The invention relates to the field of mechanical digital control, in particular to a digital servo hydraulic cylinder. A stepping motor directly drives a valve spool, large closed-loop control is realized by the aid of mechanical rigid feedback, leakage loss of a pilot stage is avoided by direct-acting design, the anti-pollution capacity of a valve is improved, a hydraulic system is simplified, single-cylinder multistage speed and directions can be controlled, multi-cylinder synchronous and reverse synchronous control and multi-cylinder interpolated linkage real-time control can also be realized, bidirectional data exchange with a field bus and an Ethernet can be performed, and the digital servo hydraulic cylinder has bus control and continuous control functions.

The invention provides a multi-way valve and a tunnel boring machine. The multi-way valve comprises a main oil inlet, an oil inlet control port, a main oil return port, a main oil drainage port and a plurality of reversing valve groups, wherein the reversing valve groups are used for controlling actuating elements respectively. Each reversing valve group is provided with a pilot-operated reversing valve and an electromagnetic reversing valve. The pilot-operated reversing valve comprises a first oil inlet, a first oil return port and two first working ports, hydraulic oil pumped from the main oil inlet is led into the first oil inlet, and the first working ports are connected with the actuating elements. The electromagnetic reversing valve comprises a second oil inlet, a first oil drainage port and two second working ports, hydraulic oil pumped from the oil inlet control port is led into the second oil inlet, and the second working ports are connected to two ends of the pilot-operated reversing valve to realize reversing thereof. Compared with the prior art, the multi-way valve has the advantages that the requirement to cleanliness of hydraulic oil is low, feedback oil ways are not easy to be blocked, automatic control is easy to realize and the like.

A hydraulic system for operating an automatic transmission for motor vehicles includes a hydraulic actuator for operating a clutch and a stop valve, whereas the actuator has a pressurizable actuating pressure chamber, which can be closed in a pressure-tight manner by means of the stop valve, such that the clutch pressure is maintained independent of the other pressures of the hydraulic system. The stop valve includes a closure device that is movable by means of a hydraulic control pressure (p_S) into a closed position, in which an actuating pressure chamber port, and thus the actuating pressure chamber, is closed by means of the closure device. The closure device is movable into an open position at least by means of the force of a spring, in which the actuating pressure chamber port is opened. Thereby, the stop valve features a shiftable locking device, by means of which the closure device can be fixed in the closed position.

The invention discloses an integration series connection cylinder with an adjustable stroke. The integration series connection cylinder with the adjustable stroke comprises a front piston, a back piston, a front cylinder body, a back cylinder body, a piston rod I, a piston rod II, a cylinder front body, a cylinder middle body, a cylinder cover and a set of pull rods. The integration series connection cylinder with the adjustable stroke is characterized in that a front hydraulic cylinder is composed of the cylinder front body, the front cylinder body, the cylinder middle body, the front piston, the piston rod I and the like, a back hydraulic cylinder is composed of the cylinder middle body, the back cylinder body, the cylinder cover, the back piston, the piston rod II and the like, and the front hydraulic cylinder and the back hydraulic cylinder are connected through the cylinder middle body, the piston rod II and the set of pull rods in series to form the series connection cylinder. The integration series connection cylinder with the adjustable stroke is high in synchronization precision and anti-unbalance loading capability, the stroke is adjustable, and the stroke adjusting amount of a plate bending machine can be directly controlled; the integration series connection cylinder with the adjustable stroke is high in integration degree, the hydraulic system is simplified, the control capability is high, and the integration series connection cylinder with the adjustable stroke is safe and reliable.

The invention relates to a hydraulic cylinder and provides an integrated hydraulic cylinder with a bidirectional stroke limit function. The integrated hydraulic cylinder is used for achieving bidirectional piston rod stroke limit of the hydraulic cylinder from any cavity to another cavity on the basis that the basic functions of the hydraulic cylinder are achieved in narrow space. The integrated hydraulic cylinder is composed of a cylinder block, a big end cover, a piston, a guide sleeve, a sealing assembly, a limit valve, a stop check valve and a pipeline. The limit valve is composed of a small oil cylinder, a valve sleeve, a spring, a valve element and the like. The small oil cylinder is composed of an end cover, a small cylinder block and a small piston. The stop check valve is composed of a valve deck, a valve body, a valve rod and a valve cone. The limit valve is integrated into the big end cover of the hydraulic cylinder. The stop check valve is integrated into the cylinder block of the hydraulic cylinder. According to the integrated hydraulic cylinder, the limit valve and the stop check valve are integrated, and multiple functions are added on the basis of scarcely increasing the size of the hydraulic cylinder. The integrated hydraulic cylinder has the beneficial effects of being rich in function, compact in structure, high in integration level and the like.

The invention relates to a hydraulic cylinder, which provides an integrated hydraulic cylinder with bidirectional stroke limitation, which is used to realize the bidirectional piston rod stroke from any cavity of the hydraulic cylinder to the other cavity on the basis of realizing the basic functions of the hydraulic cylinder in a narrow space limit. The invention is composed of a cylinder body, a large end cap, a piston, a guide sleeve, a sealing assembly, a limit valve, a stop check valve and a pipeline; the limit valve is composed of a small oil cylinder, a valve sleeve, a spring, a valve core, etc.; It is composed of an end cover, a small cylinder body and a small piston; the stop check valve is composed of a valve cover, a valve body, a valve stem and a valve cone. The limit valve is integrated in the large end cover of the hydraulic cylinder, and the stop check valve is integrated in the cylinder block of the hydraulic cylinder. The invention integrates the limit valve and the stop check valve, so that the hydraulic cylinder can increase multiple functions without increasing the volume substantially. The invention has the characteristics of rich functions, compact structure, high integration degree and the like.

The invention discloses a unilateral variable damping control type 2D hydraulic cylinder based on the hydraulic half bridge. The hydraulic cylinder comprises a cylinder body, a cylinder sleeve, a front end cover, a rear end cover, a piston rod and a piston and further comprises a stepping motor, an ejecting block, a displacement sensor (LVDT), a guide mechanism and a guide mechanism fixed frame; the novel hydraulic cylinder structure is designed, the cylinder sleeve structure is added, a high pressure hole and a low pressure hole are designed in the piston and can be matched with the cylindersleeve to form the hydraulic damping half bridge, the stepping motor drives the cylinder sleeve to directly control the hydraulic cylinder piston rod to stretch out and draw back, the displacement sensor (LVDT) is used for detecting the piston rod displacement, digital control over the hydraulic cylinder is achieved, a hydraulic control valve is omitted, and the hydraulic system is simplified.

The invention belongs to the technical field of mechanical equipment, and relates to a pre-tightening method for a super-lift inhaul cable of an all-terrain crane. The pre-tightening method comprisesthe following steps that S1, a proper working condition is selected, the arm length L of the all-terrain crane is determined according to the lifting height, amplitude and the like, and the length H of the released super-lift inhaul cable is determined according to the arm length L; S2, a main arm extends to a rope releasing position, a winch releases the super-lift inhaul cable with the length ofH, and a locking device is locked; and S3, a main arm telescopic oil cylinder pushes a second-section arm to extend, so that the length of the arm reaches L, and pre-tightening is achieved. Accordingto the pre-tightening method for the super-lift inhaul cable of the all-terrain crane, the pre-tightening principle is characterized in that the main arm telescopic oil cylinder pushes the main arm to extend, and the hinge point at the upper end of the super-lift inhaul cable extends outwards along with extension of the main arm, so that the distance between the two hinge points of the inhaul cable is increased, and tensioning of the inhaul cable is achieved; and according to the pre-tightening method for the super-lift inhaul cable of the all-terrain crane, the structure is simplified, the preparation time is saved, the operation steps are reduced, and a tensioning oil cylinder in a super-lift supporting rod can be effectively replaced, so that a hydraulic system is simplified, the manufacturing cost is saved, the main arm telescopic oil cylinder is fully utilized to provide large pre-tightening force, and the lifting performance of the crane is maximized.

The invention relates to a high-pressure protection device for a hydraulic cylinder, which relates to the technical field of hydraulic control, and solves the problems in the prior art that the pipelines of the oil spill protection device are redundant and the position accuracy of the hydraulic cylinder is difficult to guarantee after oil spillage. The hydraulic cylinder high pressure protection device of the present invention includes a valve body and a first piston, a second piston and a spring installed in the inner cavity of the valve body; the spring is located between the first piston and the second piston; The ends are respectively connected with the rodless cavity and the rod cavity of the hydraulic cylinder; when the pressure in the rodless cavity and the rod cavity overcomes the initial elastic force of the spring, the hydraulic oil pushes the first piston and the second piston to compress the spring, and the hydraulic oil flows to inside the valve cavity. The hydraulic cylinder high-voltage protection device of the present invention has a simple structure, can be directly installed on the hydraulic cylinder control valve block, saves the overflow valve and the oil overflow pipeline, and simplifies the hydraulic system; The displacement does not exceed 1mm, which ensures the position accuracy of the hydraulic cylinder.

The invention discloses a guide drilling tool for developing shale gas. The guide drilling tool comprises a spiral drilling rig, a transmission shaft, a hydraulic system, a guide sleeve and a shell sleeved outside the spiral drilling rig, wherein the periphery of the lower end of the guide sleeve is provided with four oil cylinders which are parallel to the axial direction and are uniformly distributed on the guide sleeve at the included angles of 90 degrees; every two oil cylinders which are 180 degrees away from each other form a pair of reverse synchronous oil cylinders, so that two pairs of reverse synchronous oil cylinders are formed; four guide push arms are arranged on the guide sleeve corresponding to the four oil cylinders; one end of each guide push arm is hinged on the guide sleeve; and the piston rod ends of the four oil cylinders are arranged together with the other end of the guide push arm through a push block respectively, so that an adjustable upper stabilizer is constructed. The guide push arm is equivalent to a controllable eccentric upper stabilizer, and is combined with a lower stabilizer which rotates near a drill bit, so that a well track is smoother, and the control accuracy and efficiency of the well track are increased.

The invention discloses a built-in type constant pressure outputting controlled pressure source module, which is characterized by the following: comprising module body; opening pivoted oil pump inlet P, multiport proportion operating valve group rotating group outlet P', controlled pressure outlet Y1, Y2 and draining mouth T'; dividing the rotating oil pump inlet P to at least two ways; connecting the one way to the multiport proportion operating valve group rotating group outlet P'; connecting the other way to filter F; dividing the other end of the filter F to two way through adjustable pressure output pressure relief valve Rd; connecting one way to the controlled pressure outlet Y1, Y2 through each one-way valve S; connecting the other way to the draining mouth T' through adjustable pressure-limiting valve Rf. This invention possesses compact structure, which can decrease cost.

The invention discloses an axle balance control system of a self-walking type aerial working vehicle. The system mainly comprises a front axle, a balance oil cylinder, a balance valve, a vehicle frame, an electromagnetic valve, a shuttle valve and a rear axle, wherein two ends of a hydraulic oil cylinder are connected onto the vehicle frame and the front axle above the vehicle and an axle respectively, the balance oil cylinder is connected with the electromagnetic valve through the balance valve, the electromagnetic valve is connected with the shuttle valve, the rear axle is in rigid connection with the vehicle frame, and the front axle is connected with the vehicle frame through a hinge pin. The axle balance control system overcomes defects that drive wheels cannot be grounded simultaneously, a suspension wheel idles and driving force of a vehicle in running is insufficient when a self-walking type aerial working platform runs on an uneven road surface; the safety of aerial working can be guaranteed due to the rigid connection of the axle and the vehicle frame in the operation process.

The invention discloses a unilateral variable damping control type 2D hydraulic cylinder based on the hydraulic half bridge. The hydraulic cylinder comprises a cylinder body, a cylinder sleeve, a front end cover, a rear end cover, a piston rod and a piston and further comprises a stepping motor, an ejecting block, a displacement sensor (LVDT), a guide mechanism and a guide mechanism fixed frame; the novel hydraulic cylinder structure is designed, the cylinder sleeve structure is added, a high pressure hole and a low pressure hole are designed in the piston and can be matched with the cylindersleeve to form the hydraulic damping half bridge, the stepping motor drives the cylinder sleeve to directly control the hydraulic cylinder piston rod to stretch out and draw back, the displacement sensor (LVDT) is used for detecting the piston rod displacement, digital control over the hydraulic cylinder is achieved, a hydraulic control valve is omitted, and the hydraulic system is simplified.

A flow-adjustable double side plate type three-position four-way rotary valve comprises a valve element, wherein valve plates are installed at two ends of the valve element in a matched mode, an adjustable boss is installed at the other end of each valve plate, the centers of the adjustable bosses are holed and are installed on an output end of a motor shaft of a built-in motor, a lead screw adjusting nut mechanism consists of an output lead screw shaft slippage nut of the built-in motor, wherein a lead screw shaft is arranged in a central hole of the motor shaft, the slippage nut can slide in an inner hole formed in an outer end cover, thrust ball bearings are connected between the slippage nut and the adjustable bosses, the outer end cover is connected with a valve sleeve, threads at two ends of the lead screw shaft are oppositely symmetric so that the adjustable bosses at two ends of the valve element can perform same-direction or reverse-direction linear motions, four small holes for springs to be arranged are formed in the adjustable bosses to ensure that the adjustable bosses always abut against the end face of the valve element in the axial moving process. The flow-adjustable double side plate type three-position four-way rotary valve controls on and off of hydraulic oil through matched rotations of the valve plates at two ends of the valve element, adjusts oil flow through the adjustable bosses and enables a hydraulic system to be simplified.

The invention discloses an integration series connection cylinder with an adjustable stroke. The integration series connection cylinder with the adjustable stroke comprises a front piston, a back piston, a front cylinder body, a back cylinder body, a piston rod I, a piston rod II, a cylinder front body, a cylinder middle body, a cylinder cover and a set of pull rods. The integration series connection cylinder with the adjustable stroke is characterized in that a front hydraulic cylinder is composed of the cylinder front body, the front cylinder body, the cylinder middle body, the front piston, the piston rod I and the like, a back hydraulic cylinder is composed of the cylinder middle body, the back cylinder body, the cylinder cover, the back piston, the piston rod II and the like, and the front hydraulic cylinder and the back hydraulic cylinder are connected through the cylinder middle body, the piston rod II and the set of pull rods in series to form the series connection cylinder. The integration series connection cylinder with the adjustable stroke is high in synchronization precision and anti-unbalance loading capability, the stroke is adjustable, and the stroke adjusting amount of a plate bending machine can be directly controlled; the integration series connection cylinder with the adjustable stroke is high in integration degree, the hydraulic system is simplified, the control capability is high, and the integration series connection cylinder with the adjustable stroke is safe and reliable.

The invention belongs to the technical field of mechanical equipment, and relates to a method for pre-tightening cables of super-lifting all-terrain cranes. The steps are as follows: S1: Select a suitable working condition, determine the arm length L of the all-terrain crane according to the lifting height, amplitude, etc., and determine the length H of the super-lifting cable according to the arm length L; S2: Extend the main arm to the rope release position, The hoist releases the super-lifting cable with a length of H, and the locking device is locked; S3: The telescopic oil cylinder of the main arm pushes the second-section arm to extend, so that the arm length reaches L, and realizes pre-tightening. The pre-tightening principle of the present invention is as follows: the telescopic oil cylinder of the main arm pushes the main arm to elongate, the upper hinge point of the super-lifting cable stretches out with the elongation of the main arm, and the distance between the two hinge points of the cable increases, realizing the tension of the cable. tension. The invention simplifies the structure, saves preparation time, reduces operation steps, can effectively replace the tensioning oil cylinder in the super-lifting strut, simplifies the hydraulic system, saves manufacturing costs, and makes full use of the telescopic arm oil cylinder to provide a large pre-tightening force, so that the crane can lift Heavy performance is maximized.

The invention belongs to the technical field of petroleum machinery and particularly provides a lifting type hydraulic power catwalk system designed for transporting drilling tools automatically between a drilling tool rack and a drilling floor. The lifting type hydraulic power catwalk system mainly comprises a drilling tool rack turn-out mechanism, a turn-over arm mechanism, a turn plate mechanism, a lifting mechanism and a tackle mechanism, wherein the drilling tool rack turn-out mechanism transports the drilling tools between the drilling tool rack and a main catwalk body by the aid of lifting of hydraulic cylinders; the turn-over arm mechanism transports the drilling tools from turn-over arms to conveying arms or returns the drilling tools; the turn plate mechanism cooperates with the turn-over arm mechanism to transport single drilling tool from the turn-over arms to the conveying arms or return the drilling tool; the lifting mechanism lifts the conveying arms for conveying the drilling tools to a certain height; the tackle mechanism pushes the drilling tools out for a certain distance along the conveying arms. The lifting type hydraulic power catwalk system has the advantages of high degree of automation, high applicability and stability, simple structure, stability and reliability, and is particularly suitable for operation of medium-small sized drilling rigs with lower drilling floors.

The invention relates to an emulsion cylinder crane walking device, belonging to the technical field of crane walking device; the technical problem to be solved is to provide an emulsion cylinder crane walking device with good safety and simple structure so as to lead cranes under the coal mine to continuously walk for a long distance, wherein a first rack and a second rack are respectively arranged on the upper portion and the lower portion of a frame in a parallel manner; the frame vertically moves under control of a lifting hydraulic cylinder so that a gear is meshed with the first rack or with the second rack; a retractable hydraulic cylinder controls the moving direction of the frame so that the racks drive the gear meshed therewith to rotate; the gear is fixed on a cantilever axle and rotates to drive a crane roller mounted on the cantilever axle to rotate; the crane roller rotates to drive the crane to walk; both the lifting hydraulic cylinder and the retractable hydraulic cylinder employ the existing emulsion pressure system in the coal mine as power; and the emulsion cylinder crane walking device is used for walking of cranes.