4694results about "Fluid-pressure actuators" patented technology

A pump system includes a housing defining a first internal volume and a second internal volume, a first piston positioned to separate the first internal volume into a first chamber and a second chamber, a second piston positioned to separate the second internal volume into a third chamber and a fourth chamber, a first inlet check valve configured to permit fluid flow into the first chamber, a second inlet check valve configured to permit fluid flow into the third chamber, a directional control valve (DCV) repositionable between (a) a first position where the DCV is configured to fluidly couple the second chamber to a high pressure fluid source and (b) a second position where the DCV is configured to fluidly couple the fourth chamber to the high pressure fluid source, and a relief valve configured to supply a fluid to the DCV through an orifice to move the DCV.

A modular electric power take-off (E-PTO) system for a refuse vehicle includes a modular housing. The modular E-PTO also includes a motor, an inverter, a battery, and a hydraulic pump positioned within the modular housing. The modular housing is removably coupled with a front of a waste receptacle or a hopper of the waste receptacle of a refuse vehicle.

Provided is a three-dimensional loading structure of an ultra-large physical simulation facility for deep engineering disasters. The three-dimensional loading structure comprises a horizontal ultra-large reaction frame, a vertical ultra-large reaction frame, ultra-long stroke lifting and locking hydraulic cylinders, five array distributed hydraulic actuator groups and a linear distributed hydraulic actuator group, wherein the horizontal ultra-large reaction frame adopts a frame structure being formed by splicing eight segments of arch beams, circular in an outer part and square in an inner part, and wrapped with prestressed carbon fibers, and the vertical ultra-large reaction frame adopts a double-beam four-column preload frame structure; the five array distributed hydraulic actuator groups are distributed around the horizontal ultra-large reaction frame and at a top of the vertical ultra-large reaction frame, and the linear distributed hydraulic actuator group is located at a center of a bottom of the vertical ultra-large reaction frame.

The invention discloses a hydraulic oil cylinder with high buffering performance, and relates to the technical field of hydraulic oil cylinders, the hydraulic oil cylinder comprises a reciprocating motion assembly, and the reciprocating motion assembly is used for driving a piston rod to do reciprocating rectilinear motion. During use, when a sealing piston is about to move to a stroke terminal, a buffer ring generates thrust on an annular plate, so that two nitrile rubber pads are sunken, meanwhile, a reset spring is extruded and contracted, and under the cooperation of the reset spring and the nitrile rubber pads, the sealing piston is preliminarily buffered, and in addition, a connecting rod pushes a buffer plate to move in an arc-shaped cover; the piston rod body is filled with hydraulic oil and gradually extrudes polyurethane foam, the polyurethane foam has good buffering performance, the filled hydraulic oil generates viscous resistance, the extruded hydraulic oil can enter the buffering cavity through the oil inlet cavity, secondary buffering is conducted on the sealing piston under the cooperation of the polyurethane foam and the filled hydraulic oil, the movement speed of the piston rod body is gradually reduced, and the sealing effect is improved. And stable speed reduction and stopping are realized.

The invention discloses a special cooling device for a computer GPU (Graphic Processing Unit) cluster server, which comprises a box body, a support frame, a circulating pipe, a cooling box, a first piston cylinder, a liquid outlet pipe, an injection pipe, a liquid inlet pipe, a heat dissipation mechanism, a cooling mechanism, a detection mechanism and an auxiliary mechanism, meanwhile, a filter plate can prevent dust in air from entering, a detection mechanism monitors the temperature in the box body in real time by utilizing the thermal expansion characteristic of alcohol, and a signal is transmitted to an external controller through a pressure sensor so that a worker can master the operation temperature state of the server in real time; the cooling mechanism automatically adjusts the flow speed and flow of cooling liquid according to temperature changes so as to meet the heat dissipation requirements of the server under different loads, the auxiliary mechanism conducts rolling sweeping on a filter plate through a cleaning roller, smooth air circulation is ensured, the efficient and intelligent cooling effect is achieved, and the service life of the server is prolonged. And the operation stability and the service life of the GPU cluster server are improved.

The bottom end cap has an outer surface having a first upper O ring groove and a second lower O ring groove. The outer surface has a pressure line aperture therein. The outer surface has a snap ring groove and a third sweep O ring groove. The bottom end cap has a lower portion and an upper portion. The upper portion has a recess therein and the lower portion having a slot therein. The lower portion has a pin hole being located orthogonal to the slot.

There is an outer surface having a first upper O ring groove and a second lower O ring groove. The outer surface has a pressure line aperture therein. The outer surface has a snap ring groove and a third sweep O ring groove. The top end cap has a lower portion and an upper portion. The pressure line aperture has a thread. The inner surface forms a passageway through the length of the top end cap.

The utility model discloses a hydraulic rock drill which comprises a machine body composed of a machine base, a cylinder body, a middle body, a gear box, a gear box cover and a machine head which are sequentially connected, a first cavity for containing an impact piston and a second cavity for containing a bit shank are formed in the machine body, and a cooling lubricating cavity communicated with the first cavity and the second cavity is formed in the machine body. An air inlet chamber is formed in the machine base, and an air inlet communicated with the air inlet chamber is formed in the rear end of the machine base. The impact piston is provided with a central channel which is communicated with the air inlet chamber and the cooling and lubricating air chamber; an air passing channel which is communicated with a gap between the bit shank, the rotary assembly and the machine head and a gap between the bit shank and the machine head part is formed in the machine head; cooling and lubricating air introduced into the air inlet chamber enters the cooling and lubricating cavity through the center channel of the impact piston, sequentially passes through the bit shank, the gap between the rotary assembly and the machine head and the air passing channel, enters the gap between the head of the bit shank and the machine head and is blown out, and the situation that the cooling effect is poor due to the fact that air flow is poor after heat exchange is avoided.

The utility model belongs to the technical field of hydraulic execution components, and particularly relates to a hydraulic cylinder sleeve type connector which comprises a hydraulic cylinder sleeve body, a pipeline connecting piece is fixed at the upper end of the hydraulic cylinder sleeve body, an upper connecting piece is fixed inside the pipeline connecting piece, and a sealing ring is fixed at the lower end of the upper connecting piece. A centering conical barrel is fixed to the lower side of the hydraulic cylinder sleeve body, symmetrical locking hydraulic cavities are formed in the lower end of the interior of the hydraulic cylinder sleeve body, hydraulic cylinder covers are fixed to the upper ends of the symmetrical locking hydraulic cavities, limiting grooves are formed in the left side and the right side of an upper connecting piece, clamping jaws are arranged in the two limiting grooves, and a clamping block is arranged in the clamping jaws. The hydraulic piston cylinder moves to drive the piston connecting rod to move, so that the piston connecting rod drives the driving ring plate on the side wall to move, the driving ring plate is matched with the clamping jaw, the upper connecting piece and the lower connecting piece are clamped, locking and unlocking are easier, and the locking effect is better.

The invention relates to the technical field of deep sea equipment engineering, and discloses a pressure energy power cylinder and an action control method thereof.The pressure energy power cylinder comprises a sealing cylinder body, a piston rod and an underwater control piece; the piston rod comprises a push rod and a piston connected to the bottom end of the push rod, the top end of the push rod slidably and hermetically penetrates through the top end of the sealed cylinder body, and the piston divides a cavity of the sealed cylinder body into a rod cavity and a rodless cavity; the underwater control piece is installed at the bottom of the sealing cylinder body and can be driven to be switched on and switched off under the action of external pressure, so that the rodless cavity is communicated with or disconnected from the outside. The pressure energy power cylinder passes through the deep sea underwater control part. By the adoption of the technical scheme, the rodless cavity is communicated with the outside by controlling on-off of the underwater control piece under the external action, so that the power cylinder can stably output power, energy does not need to be additionally provided, and the device is simple in structure, free of a motor, a pumping system and a complex control system, easy to implement, safe and reliable.

The present invention provides a swing type hydraulic actuator, which relates to the field of swing hydraulic cylinders. In order to solve the problem that the sealing performance and durability of the current swing hydraulic cylinder sealing structure are relatively poor, a cavity is formed by a cylinder body and a rotating shaft to accommodate stator blades and rotor blades, and the wedge surfaces of the end face sealing ring and the axial combined sealing ring are used to perform preliminary pre-tightening on the two seals; at the same time, an annular tightening oil chamber is provided on the end cover, and the pressure of the annular tightening oil chamber is adjusted according to the requirements of the working environment, so that the deformation of the end cover acts on the end face sealing ring and the axial combined sealing ring, providing a second pre-tightening for the end face sealing ring and the axial combined sealing ring, thereby improving the environmental adaptability of the blade type swing oil cylinder.

The high-precision high-rigidity sliding table air cylinder comprises a cylinder body, a sliding table is slidably connected to the outer surface of the bottom of the cylinder body, piston rods are symmetrically and slidably connected to the interior of the cylinder body, and the ends, extending out of the cylinder body, of the piston rods are rotationally connected with floating connectors; an anti-deflection assembly is arranged on the outer surface of each piston rod and comprises guide rails symmetrically and fixedly connected to the outer surfaces of the piston rods, and clamping rings are slidably connected to the outer surfaces of the piston rods in a damping mode. Relative rotation of the piston rod in the movement process is prevented, lateral component force is generated in the movement process due to the relative rotation of the piston rod, uneven pressure distribution is generated between the piston rod and the inner wall of the cylinder body due to the lateral component force, and therefore the movement precision of the piston rod is affected; lateral component force can be eliminated or reduced, so that force borne by the piston rod in the moving process is more uniform, and the precision of the sliding table air cylinder can be improved.

The utility model relates to the technical field of hydraulic oil cylinders, in particular to a sealing mechanism of a hydraulic oil cylinder, which comprises a cylinder body, a telescopic rod is arranged at one end of the cylinder body, and a sealing shell is arranged outside the cylinder body; and the anti-collision assembly is mounted in the sealing shell. The elastic force is applied to the pressing ring through the first spring, it can be guaranteed that the pressing ring can be tightly attached to the connecting position of the cylinder body and the telescopic rod, the connecting position of the cylinder body and the telescopic rod is sealed through the sealing gasket, and compared with a traditional hydraulic oil cylinder, the sealing effect of the hydraulic oil cylinder is greatly improved; by means of the design of the anti-collision assembly, certain anti-collision capacity is added to the anti-collision hydraulic cylinder, compared with a traditional hydraulic cylinder, the anti-collision hydraulic cylinder can protect the connecting position of the cylinder body and the telescopic rod with certain capacity, the situation that the connecting position is affected by external force, the telescopic rod is inclined, and consequently pressure relief and the like are possibly caused is avoided, and practical safety is improved.

The utility model discloses a brake device for a tensioning oil cylinder, and belongs to the technical field of brake equipment. The brake device comprises a cylinder body, a piston, a brake ball, a brake cylinder and an elastic piece, a piston rod penetrates through the cylinder; the piston, the brake cylinder and the elastic piece are all arranged in the cylinder body, the bottom of the elastic piece is connected with the cylinder body, the brake cylinder is arranged above the elastic piece, and the piston is arranged above the brake cylinder; the brake ball can abut against the inner wall of the brake cylinder and the outer wall of the piston rod. A sealing cavity is formed between the cylinder body and the piston; and an oil inlet nozzle communicated with the sealing cavity is arranged on the cylinder wall of the cylinder body. The brake device opens the brake by using the pressure of hydraulic oil and holds the brake by using the restoring force of the elastic piece, so that the stability of the telescopic state of the piston rod is improved; and the brake opening or contracting time can be flexibly adjusted according to the change speed of the oil pressure. The utility model belongs to a normally closed brake structure, and meets the mechanical safety performance requirements of products.

A modular electric power take-off (E-PTO) system for a refuse vehicle includes a modular housing. The modular E-PTO also includes a motor, an inverter, a battery, and a hydraulic pump positioned within the modular housing. The modular housing is removably coupled with a front of a waste receptacle or a hopper of the waste receptacle of a refuse vehicle.

The utility model relates to the field of aerial work platforms, and discloses a liquid collecting device and an aerial work platform, and the liquid collecting device comprises a steering oil cylinder liquid receiving disc which is provided with a liquid receiving cavity used for receiving leaked liquid of a steering oil cylinder; the steering oil cylinder liquid receiving disc is detachably arranged on the liquid receiving disc mounting seat, the liquid receiving disc mounting seat is provided with a connecting part, and the connecting part is used for being connected with a cylinder body of a steering oil cylinder; and the limiting structure has a locking state and an unlocking state, when the limiting structure is in the locking state, the steering oil cylinder liquid receiving disc can be locked in the liquid receiving disc mounting base, and the steering oil cylinder liquid receiving disc can be taken out of the liquid receiving disc mounting base when the limiting structure is in the unlocking state. According to the liquid collecting device and the aerial work platform, leaked liquid of the steering oil cylinder can be collected, and the liquid leakage problem of the aerial work platform can be solved.

The utility model discloses an air cylinder facilitating lubrication of a piston rod, and relates to the technical field of air cylinders. The air cylinder comprises an air cylinder body. The air cylinder body is started to drive the extrusion assembly to move, lubricating oil in the extrusion assembly can be pushed in the retraction process of the extrusion assembly, and then when the lubricating oil in the extrusion assembly is pushed into the lubricating assembly, the lubricating oil makes contact with the outer surface of a piston rod in the air cylinder body; then the lubricating oil enters the backflow assembly, under the action of the backflow assembly, the lubricating oil in the backflow assembly can be slowly pushed to enter the lubricating assembly, the lubricating oil in the backflow assembly flows into the extrusion assembly, and in the flowing process, the lubricating oil can make full contact with a piston rod in the air cylinder body; and therefore, the air cylinder can be fully lubricated and is prevented from being abraded to influence the use of the air cylinder body.

A system for cooling plungers which operate in high pressure pumps. The system uses a plunger having a blind bore formed therein. The blind bore may receive a number of different objects, some of which are fixed to the plunger. A heat exchanger may be installed within the blind bore. The heat exchanger may have internal passages or openings which allow for the circulation of fluid within the blind bore, thus cooling the plunger. The heat exchanger may be formed of a material having a higher thermal conductivity than the material used to form the plunger. This allows the heat exchanger to cool the plunger more effectively than if the plunger were solid or filled with an empty air space. The heat exchanger may be sealed within the bore of the plunger, or exposed.

A pneumatic nail gun, comprising: a nail output portion (9) filled with a fastener, and a striking portion (1), the striking portion comprising a striker (4); and a lifting portion (11) for lifting the striker, the lifting portion comprising a sliding latch (16b); the sliding of the sliding latch in a rotary disk (12) causes the lifting portion to disengage from the striker, and the striker moves in a first direction, thereby realizing nailing.

The utility model discloses a pull rod cylinder with a buffer structure, which is characterized in that a cylinder barrel is arranged between a front end cover and a rear end cover, and a buffer cavity is arranged on one side, close to the front end cover, of the rear end cover; the piston rod penetrates through a center hole of the front end cover and can axially move; the piston is in threaded connection with the piston rod; the piston rod drives the piston to axially move in the cylinder barrel; the buffering sleeve can be embedded into the buffering cavity, the buffering sleeve is in threaded connection with the piston rod, the buffering sleeve is provided with a plurality of first buffering holes axially parallel to the second threaded hole and a plurality of sets of second buffering holes distributed in the radial direction of the buffering sleeve at equal intervals, and each set of second buffering holes communicate with the corresponding first buffering hole; according to the pull rod cylinder with the buffering structure, in the buffering process that the buffering sleeve is embedded into the buffering cavity, the throttling area changes along with the stroke, the buffering pressure is kept uniform, damage caused by collision of the piston to the rear end cover under high-speed operation can be avoided, and the service life of the oil cylinder is effectively prolonged.

The utility model discloses a hydraulic oil cylinder for adjusting a movable arm of a loading machine, and relates to the technical field of hydraulic oil cylinders. A piston rod is arranged in the cylinder body shell, the outer surface of the cylinder body shell is fixedly connected with a limiting assembly, the cylinder body shell is fixedly connected with a heat conduction assembly through the limiting assembly, the outer surface of the heat conduction assembly is slidably connected with a cooling assembly, and the outer surface of the cooling assembly is fixedly connected with a connecting assembly. Through connection of the heat conduction assembly and the cooling assembly, heat generated by friction between the piston rod and the cylinder body shell is transmitted to the heat conduction assembly, the heat conduction assembly increases the contact area of the cylinder body shell and external air, and heat dissipation is facilitated; the cooling assembly can move along with the position of the piston on the piston rod, additional cooling and heat dissipation treatment is carried out on the friction position of the piston on the piston rod and the cylinder body shell, and thermal deformation of the cylinder body shell and the piston rod is avoided.

The invention discloses a hydraulic mechanism for a water-cooled magnet structure with high mechanical stability. The hydraulic mechanism comprises a cylinder body, a piston, a check ring, a pressure equalizing pad, a limiting block, a first force transmission check ring, a first anti-rotation pin, a second force transmission check ring, a second anti-rotation pin, a first force transmission column and a second force transmission column. The water-cooled magnet has the advantages that axial stress application can be carried out on the magnet coil assembly, the pressing force on the magnet coil assembly is improved, the problems of tension fracture and damage caused by coil stress overrun due to overlarge radial expansion electromagnetic force of a magnet coil bit piece and an insulating piece are solved, and the high mechanical stability of the water-cooled magnet is improved.

The invention discloses a composite jacking device based on hydraulic loading and mechanical locking and a using method. The device comprises a supporting piece, a jacking piece, a locking piece and a hydraulic loading assembly. The supporting piece is fixedly arranged, the jacking piece is installed on the supporting piece in a sliding mode, the hydraulic loading assembly is detachably installed on the supporting piece and drives the jacking piece to slide along the supporting piece to abut against a supported object through hydraulic pressure, and then set jacking force is applied to the supported object. The locking piece is suitable for being installed on the supporting piece and locking the position of the jacking piece after the jacking piece completes jacking; the hydraulic loading assembly is suitable for being detached from the supporting piece after locking of the locking piece is completed. The hydraulic loading device has the beneficial effects that the mechanical loading assembly and the hydraulic loading assembly are designed by integrating the advantages of machinery and hydraulic pressure, and seamless connection of hydraulic loading and mechanical loading is achieved. The hydraulic loading assembly is separated from the mechanical loading assembly after loading is completed, and the hydraulic loading assembly can be recycled.

The invention discloses a hydraulic oil cylinder with an axial supporting protection function, and belongs to the technical field of hydraulic cylinders, the hydraulic oil cylinder comprises an outer cylinder body, an oil cylinder rod and a first piston, a center oil cavity is formed in the outer cylinder body, the first piston is fixedly connected to the bottom of the oil cylinder rod, and the oil cylinder rod and the first piston are both slidably connected to the interior of the center oil cavity; a pressure buffering structure is connected into the outer cylinder body, when the oil cylinder rod bears pressure, the pressure buffering structure and the magnetic supporting structure are matched with each other to jointly share the pressure borne by the oil cylinder rod, a supporting rod in the magnetic supporting structure can transmit the pressure of the oil cylinder rod to a second piston, and therefore the oil cylinder rod is prevented from falling off. The second piston slides downwards in the storage cavity and extrudes the magnetorheological fluid, the stress of the oil cylinder rod is relieved through the buffering characteristic of the magnetorheological fluid, and therefore protection on the oil cylinder rod is effectively enhanced, and the stability and reliability of the hydraulic oil cylinder under the pressure effect are improved.

An aircraft wing includes a fixed structure and a linear hydraulic slat actuator attached to the fixed structure. The linear hydraulic slat actuator is oriented spanwise along the aircraft wing. The aircraft wing also includes an actuator output link and a slat attached to the actuator output link. The aircraft wing also includes a bell-crank coupled to the linear hydraulic slat actuator and to the actuator output link. In response to spanwise movement of the linear hydraulic slat actuator, the bell-crank is configured to move the actuator output link in a different direction that enables the slat to move between a retracted position and an extended position.

A hydraulic system for a hydrogen fueled gas turbine engine. The hydraulic system comprises a closed-loop hydraulic fluid conduit (232), a hydrogen-hydraulic fluid heat exchanger (230) configured to exchange heat between cryogenic hydrogen fuel and hydraulic fluid within the hydraulic fluid conduit (232), and a second fuel-hydraulic heat exchanger (518) configured to exchange heat between a second, non-hydrogen fuel and hydraulic fluid in the hydraulic fluid conduit (232).

The utility model relates to the field of aerial work platforms, and discloses an aerial work platform which comprises a chassis provided with a maintenance opening and a door body capable of sealing the maintenance opening. The power unit is arranged in the chassis; the liquid collecting assembly is arranged in the chassis and located below the power unit, the liquid collecting assembly comprises a power unit liquid receiving disc and a liquid receiving disc mounting piece, the liquid receiving disc mounting piece is provided with a liquid receiving disc sliding groove, and the power unit liquid receiving disc is arranged in the liquid receiving disc sliding groove in a sliding mode and is provided with a liquid receiving cavity used for receiving leaked liquid of the power unit; when the door body is in a closed state, the power unit liquid receiving disc can be locked in the liquid receiving disc sliding groove, and the power unit liquid receiving disc can be pulled out of the liquid receiving disc sliding groove when the door body is in an open state. According to the aerial work platform, leaked liquid of the power unit can be collected, and the liquid leakage problem of the aerial work platform can be solved.

The hydraulic oil cylinder with the protection structure comprises a cylinder body, a piston rod is arranged in the cylinder body in a sliding mode, a connecting block is fixedly installed at the end of the piston rod, a machining assembly is arranged outside the cylinder body, and the machining assembly comprises a protection assembly arranged outside the cylinder body. When the oil cylinder is used and a piston rod of the oil cylinder stretches out and draws back, the outer wall of the oil cylinder needs to be protected, when the piston rod pushes a connecting block to move, the connecting block drives a top cover to move along with the connecting block, and the top cover drives a protection pipe to move along with the top cover through a first bolt set. The sliding groove formed in the inner wall of the protection pipe slides on the outer wall of the sliding block fixedly installed on the outer wall of the cylinder body, under limitation of the sliding block, the protection pipe can slide on the outer wall of the cylinder body in a limited mode, the protection pipe moves along with the piston rod, the piston rod is not exposed outside, and the piston rod is protected.

The utility model relates to the field of aerial work platforms, and discloses an oil cylinder liquid collecting assembly and an aerial work platform, and the oil cylinder liquid collecting assembly comprises an oil cylinder liquid receiving part, a liquid collecting part and a liquid collecting part, the sliding groove piece is arranged below the oil cylinder and provided with a liquid receiving disc sliding groove, and the oil cylinder liquid receiving piece is arranged in the liquid receiving disc sliding groove in a sliding mode; and the liquid baffle is arranged on a mounting structural part of the oil cylinder and is used for guiding leaked liquid of the oil cylinder into the liquid receiving cavity. The oil cylinder liquid collecting assembly can comprise two liquid baffles which are arranged in a spaced mode, and a liquid guiding flow channel can be defined between the inner side plate faces of the two liquid baffles and the peripheral wall of the installation structural part. The lower plate ends of the two liquid baffles can be bent in the direction close to each other, so that an outlet in the lower end of the liquid guide flow channel is gradually narrowed. According to the oil cylinder liquid collecting assembly and the aerial work platform, leaked liquid of the oil cylinder can be collected, and the liquid leakage problem of the aerial work platform can be solved.

A modular hydraulically-adjustable preload and / or cross-over system. The system includes a housing configured to couple with a main damper cylinder, the housing including a slave cylinder within a portion of a slave cylinder chamber, the slave cylinder telescopically movable with respect to the housing; a fluid chamber; and a fluid port configured to provide a fluid flow for the fluid chamber, wherein an increase in a fluid volume within the fluid chamber causes a portion of the slave cylinder to telescopically extend from the slave cylinder chamber. A preload flange coupled with the slave cylinder at an end of the housing such that a change in a location of the slave cylinder causes a change in a location of the preload flange.