938 results about "Spool valve" patented technology

A bi-directional pneumatic impactor for imparting impact forces to an object. The impactor includes a support structure having at least one grip member and a piston reciprocally moveable along a piston axis. A pressure control system coupled with the support structure and adapted to be connected to a supply of pressurized air. The pressure control system reciprocatingly moves the piston along the piston axis to generate forceful impacts at one or both ends of the reciprocal movement. An impact transfer assembly disposed on the support structure is adapted to be coupled with the object whereby the impact transfer assembly transfers impact forces to the object in the driving and / or the retracting directions. A control spool may be used to control the supply of pressurized air to the piston cylinder. The impact transfer assembly may include a hammer pin extending axially through the piston.

A cam-driven valve system comprises a valve body designed to define a multitude of fluid channels and support an array of sliding valves within those channels, thereby controlling the fluid flow. The system includes a multitude of cams mounted on a camshaft. The camshaft is arranged such that each cam is associated with a corresponding sliding valve. Rotation of the camshaft causes the valves to be actuated via the cams. The cams on the camshaft are shaped and sized differently.

The utility model belongs to the technical field of hybrid power assemblies, and particularly relates to a pressure-controllable hybrid power gearbox hydraulic control system which comprises a lubrication cooling subsystem and an oil supply subsystem, and further comprises a main oil pressure adjusting subsystem and a clutch control subsystem, and the oil supply subsystem comprises a first mechanical pump, a second mechanical pump, a suction filter and an oil tank. The first mechanical pump is connected with the suction filter which is connected with the oil tank; the lubrication cooling subsystem comprises an oil cooler and a filter, the first mechanical pump is connected with the oil cooler and the filter through oil ways, the filter is connected with an LUB oil way, and the oil cooler is connected with an EM1 oil way, an EM2 oil way and a C1 oil way; according to the clutch control sliding valve element, the feedback oil way is arranged at the spring end, so that spring force, feedback pressure and pilot hydraulic pressure form dynamic balance, smooth curve linear control over clutch pressure can be achieved, and control smoothness is improved.

The utility model discloses a volume ratio slide valve adjusting device, a single-machine two-stage screw compressor and an air conditioning unit. The volume ratio slide valve adjusting device comprises an oil cylinder, an oil piston, a slide valve rod, a slide valve, a loading electromagnetic valve and an unloading electromagnetic valve, wherein the slide valve rod and the slide valve are sequentially connected with one side of the oil piston, and the loading electromagnetic valve and the unloading electromagnetic valve are communicated with the oil cylinder. A spring is arranged between the other side face of the oil piston and the oil cylinder, and the unloading electromagnetic valve enables the oil cylinder to be communicated with the low-pressure stage of the single-machine two-stage screw compressor. The volume ratio slide valve adjusting device is applied to a single-machine two-stage screw compressor, and the size of the high-pressure stage Vi of the compressor can be adjusted in time according to needs, that is, the volume ratio slide valve adjusting device can be adjusted to the position of the minimum Vi under the working condition of a small pressure ratio. And after the compressor is shut down, the compressor can be automatically adjusted to be in a small Vi state, so that unloading starting is facilitated. And meanwhile, the high-pressure stage Vi can be stably and reliably increased, so that the matching of the pressure ratio of the compressor is effectively realized, and the efficiency of the compressor is improved.

The invention discloses an intelligent regulation and control system for heat supply and power saving of a heat pump. The system comprises a heat pump body control optimization module, a heat pump kernel regulation optimization module, a heat source dynamic switching module and a heat supply intelligent power saving module. The invention belongs to the technical field of heat pump power-saving intelligent regulation and control, a variable-capacity compression control module accurately regulates the load of a compressor through variable-capacity control of a bimodal slide valve, and more efficient energy utilization is achieved; the heat pump working condition optimization module adopts a multi-target dynamic optimization algorithm, comprehensively considers factors such as system efficiency, service life and noise, and realizes precise adjustment of working conditions; the multi-heat-source dynamic switching module intelligently selects an optimal heat source and realizes non-inductive switching through a game decision algorithm in combination with heat source entropy efficiency, an equipment health index and energy consumption cost, so that pressure fluctuation and system instability in a heat source switching process are reduced; the working efficiency of the heat pump system is effectively improved, the energy consumption is reduced, and the maintenance cost and the failure rate are reduced.

A hydraulic system according to an embodiment of the present invention comprises: a main hydraulic pump for discharging a hydraulic fluid; a plurality of driving apparatuses operating by receiving the hydraulic fluid; a parallel flow path through which the hydraulic fluid discharged by the main hydraulic pump flows; a plurality of control spools respectively connected to the parallel flow path in parallel to control the supply of hydraulic fluid to the plurality of driving apparatuses; and a plurality of electronic proportional decompression valves for adjusting a pilot pressure, applied to the respective control spools to be proportional to a current signal which has been input, wherein, if the plurality of control spools do not operate, the hydraulic fluid discharged by the main hydraulic pump is drained into an oil tank via the parallel flow path without passing through the plurality of control spools.

The invention discloses an ultralow-temperature cascade refrigeration device, belongs to the technical field of refrigeration devices, and solves the problems that when a low-temperature screw compressor continuously operates below-80 DEG C, organic acid generated by hydrolysis of trace moisture and ester lubricating oil and metal chips form colloidal deposition, the resistance of a slide valve is increased, displacement lag is caused, and the service life of the slide valve is prolonged. However, the sensor only feeds back an instruction signal and cannot be monitored by a control system, and finally bearing wear or energy efficiency reduction is caused. Comprising a screw compressor and a slide valve state monitoring circuit arranged in the screw compressor. The actual displacement of the slide valve is measured in real time through double-frequency laser interference, the thickness of jelly is analyzed in combination with acoustic surface wave frequency shift, the fault index is calculated after dynamic compensation, early warning is conducted when the limit is exceeded, a blind area of a traditional sensor is eliminated, diagnosis is conducted in advance, and compressor bearing abrasion is avoided.

A fixed displacement hydraulic pump match flow demand control system that includes a spool valve, a plurality of fixed displacement pumps and a control valve is provided. The spool valve includes a spool. The spool is configured to shuttle within a chamber of a housing based at least in part on a pressure difference between a first end and the second end of the chamber. A fluid flow from each fixed displacement pump of the plurality of fixed displacement pumps is in fluid communication with an associated input port to the spool valve. At least one output port of the spool valve is in fluid communication with a hydraulically operated device and at least one of another output port is in fluid communication with a return. The control valve is configured to adjust the location of the spool in the chamber to regulate fluid flow to the hydraulically operated device.

A spool valve includes a sleeve having a plurality of ports, and a spool arranged inside the sleeve and having a land formed so as to be brought into sliding contact with inner walls of the sleeve. A depression is formed in the land over an entire circumference.

The utility model discloses a hydraulic control system, which relates to the technical field of hydraulic control and comprises an oil tank, a hydraulic pump, a main cylinder, a first electromagnetic plug-in mounting direction valve, a second electromagnetic plug-in mounting direction valve and a third electromagnetic plug-in mounting direction valve. The main oil supply path is communicated with a rapid cavity of the main cylinder through a first electromagnetic plug-in mounting direction valve, the main oil supply path is communicated with a lower cavity of the main cylinder through a second electromagnetic plug-in mounting direction valve, the main oil supply path is communicated with an upper cavity of the main cylinder through a third electromagnetic plug-in mounting direction valve, and the upper cavity, the lower cavity and the rapid cavity of the main cylinder are all communicated with an oil tank through an oil return path; sliding valve control of a conventional hydraulic machine is replaced by cartridge valve control, the hydraulic machine is simple in structure and stable in performance, can be widely applied to the fields of game coins, souvenir medal, medal and the like, brings considerable benefits, and can adjust the drift diameter of corresponding cartridge valve combination parts according to actual conditions so as to improve the application range.

The invention discloses a distribution valve for a transmission of a high-horsepower tractor. Comprising a valve body, an oil inlet, an oil return port, a clutch oil port, a working gear oil port, a clutch control slide valve, a clutch oil port and a brake oil port, wherein the oil inlet, the oil return port, the clutch oil port and the working gear oil port are formed in the valve body; the first overflow valve is used for controlling the pressure of the brake oil port, the second overflow valve is used for controlling the pressure of the working gear oil port, and the three-position three-way adjusting slide valve is further included. And the three-position three-way adjusting slide valve is provided with a working oil port, a slide valve oil return port, a slide valve oil inlet and a hydraulic control port which is communicated with the oil inlet and is connected with the slide valve oil inlet in parallel. The device has the characteristics that the oil pressure is accurately controlled, the oil is quickly conveyed, the oil is instantly conveyed to lubricate, cool and protect the device parts, the maintenance cost is reduced, and the normal, stable and efficient work of the tractor is ensured.

A spool valve assembly and methods for use downhole to control fluid flow into a borehole from a downhole formation. The assembly includes a valve body having an interior. The assembly also includes a spool moveable within the valve body interior from a first position wherein the spool prevents flow through the valve body, to a second position wherein the spool allows flow through the valve body at a first flow rate, and to a third position wherein the spool allows flow through the valve body at a second flow rate different than the first flow rate. The spool is moveable from the first position to the second position using hydrostatic fluid pressure acting on the spool from outside the valve body. The spool is moveable from the second position to the third position using gas pressure from a chemical reaction producing a force sufficient to overcome the hydrostatic pressure.

The invention discloses a double-screw compressor which comprises a shell, a first screw, a second screw, a third screw and a fourth screw, the shell is provided with an inner cavity, an air inlet and an air outlet, and the air inlet and the air outlet are communicated with the inner cavity; the at least one pair of screws are rotatably arranged in the inner cavity of the shell; and the internal volume ratio adjusting mechanism is arranged at the position, close to the exhaust port, of the shell and used for carrying out stepped adjustment on the through-flow area between the inner cavity of the shell and the exhaust port. According to the technical scheme, various working conditions of the compressor can be adapted, components such as a sliding valve are omitted, and the structural complexity and the control complexity are reduced.

A pneumatic conveying device for conveying granular material, in particular seeds and / or fertilizer, includes at least one blower with at least one outlet, to which the at least one main air supply line is connected, into which flows an air flow generated by the blower. The at least one main air supply line leads into an air inlet of an air distribution device for controlling the volumetric air flow. The air distribution device has an even number of air outlets, to which the respective one connecting line is connected, to which a metering device for supplying the granular material is connected. The air distribution device is embodied as a cylindrical housing with a rotary slide valve arranged therein, which is equipped for changing an outlet cross-section of the air outlets in order to manipulate the supplied volumetric air flow for transporting the granular material coming from the respective metering device.

An air volume and internal volume ratio adjusting mechanism of a double-screw compressor comprises a power source, a transmission mechanism and a slide valve. The power source is in transmission connection with the sliding valve through a transmission mechanism so as to drive the sliding valve to move and change the air volume and the internal volume ratio of the double-screw compressor, and the double-screw compressor is characterized in that the power source is a turning motor of the double-screw compressor, and the transmission mechanism comprises a first disc buckle, a second disc buckle and a threaded shaft; the threaded shaft is rotationally arranged on a machine shell of the double-screw compressor, and the first disc buckle is installed at one end of the threaded shaft and can drive the threaded shaft to rotate bidirectionally and synchronously. The slide valve is sleeved outside the threaded shaft; an internal thread of the slide valve is spirally connected with an external thread of the threaded shaft; a shell of the turning motor is detachably connected with a machine shell of the double-screw compressor, a power output shaft of the turning motor is in key connection with the second disc buckle, and the second disc buckle is detachably connected with the first disc buckle and can drive the first disc buckle to rotate bidirectionally and synchronously. The device is simple in structure, low in implementation cost and accurate in adjustment.

The present invention discloses a large flow sliding valve device, a hydraulic pile driving system and a pile driving machine, and relates to the field of hydraulic technology. The large flow sliding valve device includes a main valve body, a main valve core, a first end cover and a second end cover, and the main valve body is provided with a mounting hole for installing the main valve core; the main valve body is provided with a first channel, a second channel, a third channel, a fourth channel and a return oil channel connected to the return oil tank, the first channel and the second channel are used to communicate with the upper chamber of the oil cylinder, and the third channel and the fourth channel are used to communicate with the lower chamber of the oil cylinder; the main valve core is movable between a first position and a second position along the axial direction; the main valve core is provided with a central channel. The large flow sliding valve device provided by the present invention, when lifting the hammer, the hydraulic oil flows from the first channel and the second channel in sequence through the central channel return oil channel and flows back to the return oil tank, and the oil returns quickly; when dropping the hammer, the differential connection flow is large, the pressure loss is small, the pressure difference between the upper and lower chambers is small, the hammer drops faster, and the hammer strikes more forcefully.

The utility model discloses a slide valve air tightness detection device, which relates to the technical field of slide valve detection, aims to solve the problem of designing detection equipment for detecting the air tightness of a slide valve by using a bubble method, and comprises a step-shaped detection water tank which comprises a water storage part and a supporting plate, the supporting plate is higher than the water storage part, the supporting plate is provided with a detection port for placing a valve body, the bottom of the detection port is communicated with an air source device, and the detection water tank is provided with a sealing assembly corresponding to the detection port; a drainage assembly is arranged above the water storage part and used for squeezing water in the water storage part to the supporting plate. A water retaining edge is arranged on one side, deviating from the water storage part, of the supporting plate.

The utility model belongs to the technical field of hydraulic valves, and discloses a two-stage buffer overflow valve and a fluid control assembly. The two-stage buffering overflow valve comprises a valve seat assembly, a valve body, a valve element mechanism, an oil passing channel and a buffering piston, the valve seat assembly is provided with an oil inlet, the valve body is arranged at the end, away from the oil inlet, of the valve seat assembly in a sleeving mode, the valve body is provided with an oil outlet, and the valve element mechanism comprises a sliding valve element arranged in the valve seat assembly in a sliding fit mode; the end, away from the oil inlet, of the sliding valve element is provided with a secondary pressure building cavity, the secondary pressure building cavity communicates with the oil inlet, at least part of the oil passing channel is arranged on the sliding valve element and / or the valve seat assembly and / or the valve body, and the oil passing channel communicates with the secondary pressure building cavity and the oil outlet; the buffer piston is arranged on the valve seat assembly in a sliding and sleeving mode and can block or open the oil outlet. By prolonging the completion time of secondary pressure establishment, the buffering effect is improved, and the impact generated when the hydraulic motor is started and braked is reduced.

The invention relates to a single-slide-valve type zero-leakage two-way hydraulic lock. The two-way hydraulic lock comprises an end cover, a shell, a valve element I assembly, a valve element II assembly, a first spring, a second spring, a control piston, a plug and a locking nut. The valve element II assembly and the control piston are in dynamic sealing contact with the inner wall of the shell, the valve element I assembly is in dynamic sealing connection with the end cover, and the positions of the valve element II assembly, the control piston and the valve element I assembly are changed, so that the single-slide-valve type zero-leakage two-way hydraulic lock is adjusted to work in a locking state and a two-way circulation state. A miniaturization design concept is adopted, the two sets of hydraulic control one-way valves share one control valve element, oil ways are arranged on part of parts, threaded plug-in type compact structural design is achieved, compared with an existing two-way hydraulic lock connected in a plate mode, the number of product parts and the complex degree of flow channels are effectively reduced, an external connector is simple, and cost is low. And installation and maintenance are convenient.

To improve abrasion resistance while reducing material costs.SOLUTION: A speed control valve 30 is a speed control valve of a die cast machine that controls molten metal injection speed. The speed control valve 30 includes: a housing 35 formed with a valve hole 350 therein; a spool 34 that slides inside the valve hole 350; and a sleeve 36 fixed to the inside of the valve hole 350 and supporting the spool 34 so as to be slidable. The sleeve 36 includes: inside sleeves 361, 362 that contact the spool 34 at at least any position at the time of sliding of the spool 34; and a frame 363 provided so as to surround the periphery of the inside sleeves 361, 362. The inside sleeves 361, 362 and the frame 363 are separate bodies. A material of the inside sleeves 361, 362 has a hardness higher than that of the frame 363.SELECTED DRAWING: Figure 1

A vehicle, provided with a hydraulic system. The hydraulic system comprises a proportional solenoid valve (170), a pressure control slide valve (140), and a target mechanical valve set. The pressure control slide valve (140) is a mechanical valve. The target mechanical valve set comprises at least one mechanical valve. The proportional solenoid valve (170) is configured such that, by controlling the proportional solenoid valve (170), the pressure control slide valve (140) and the target mechanical valve set are controlled.

An air control valve, including a main valve body, a main valve cavity communicates with an auxiliary air cylinder, an air inlet channel communicates with a train pipe, the air inlet channel communicates with the main valve cavity, and an air exhaust channel communicates with the main valve cavity; a sliding valve, which attaches to the main valve cavity, a communicating channel communicates with the air inlet channel, the communicating channel communicates with the air exhaust channel, a brake inflation channel communicates with the main valve cavity, and the brake inflation channel communicates with a brake cylinder; and a shut-off valve, a shut-off valve body is provided with a shut-off valve cavity, a shut-off valve core is disposed in a driving cavity and separates the driving cavity into an auxiliary air cavity and a brake cavity, the auxiliary air cavity communicates with the auxiliary air cylinder, the brake cavity communicates with the brake cylinder, the air exhaust cavity communicates with the air exhaust channel, and the shut-off valve core has an air outlet position for communicating an air inlet of the air exhaust cavity with an air outlet of the air exhaust cavity and a closing position for separating the air inlet of the air exhaust cavity from the air outlet of the air exhaust cavity.

A display container includes an enclosure having a container body and a lid mounted to the container body for enclosing an interior chamber of the enclosure. The lid has an integrated lens positioned over the interior chamber and a plurality of ports extending through the lid adjacent the lens. The display container further includes a slide valve assembly for selectively opening and closing the ports. The slide valve assembly includes a track fixed relative to the lid in alignment with the ports, and a slide plate slidably received in the track. The slide plate is slidable back and forth along the track between a first position in which the slide plate blocks the ports and a second position in which the ports are unblocked.

The invention discloses a screw compressor slide valve adjusting mechanism with an oil-pressure-free unloading function. The screw compressor slide valve adjusting mechanism comprises a flow piston, a volume ratio piston, a volume ratio slide valve, a flow slide valve, a compression spring, a guide rod, a three-position four-way electromagnetic reversing valve, a valve seat, a steering engine and a valve element. The valve element is rotatably installed in the valve seat and driven by the steering engine to rotate, and the valve element is provided with an internal channel structure and can be driven to rotate to different working positions so as to control communication between the oil pipe and the oil cavities, so that the flow of the flow sliding valve and the volume ratio of the volume ratio sliding valve are selectively adjusted. According to the screw compressor slide valve adjusting mechanism with the oil-pressure-free unloading function, an oil pump does not need to provide high oil pressure, the flow load of the compressor can be reduced to the minimum, the compressor gets rid of dependence on the oil pump, unloading is carried out by utilizing downtime, the starting time is shortened, and the structure is more simplified.

The invention belongs to the technical field of slide valve pair zero-zone micro-scale static characteristic testing, and provides a slide valve pair zero-zone micro-scale static characteristic high-precision test bed and a test method.The slide valve pair zero-zone micro-scale static characteristic high-precision test bed comprises an ultra-precision slide valve pair mounting table and a slide valve pair static characteristic hydraulic testing system; by selecting a control element and a detection element which can measure and control the flow, the pressure and the temperature in a high-precision and precise manner, and combining an innovatively developed test subprogram, an intelligent data processing algorithm and a test model machine learning algorithm, the measurement precision, the test result confidence coefficient and the measurement efficiency are improved; according to the test bed, based on a hydraulic test system for the micro-scale static characteristics of the zero region of the slide valve pair, a control element and a detection element which can measure and control the flow, the pressure and the temperature in a high-precision and accurate manner are carefully selected, and the micro-scale static characteristic measurement under different flow, pressure and temperature of the zero region of the slide valve pair can be comprehensively and accurately simulated.

The invention relates to a dual-mode proportional servo valve oriented to multi-axis control and giving consideration to high dynamic and large flow. The dual-mode proportional servo valve comprises a valve body, a valve element, two end covers, two rigidity adjusting mechanisms, two proportional electromagnets, a Hall displacement sensor and a proportional servo controller. The two end covers, the rigidity adjusting mechanism and the proportional electromagnet are symmetrically arranged on the left side and the right side of the valve body, and the middle of the valve element is located in the valve body. The valve element is a non-circumferential opening sliding valve, a left stepped shaft part and a right stepped shaft part are arranged in the middle of the valve element, and a two-stage combined throttling groove with the through-flow area changing in the axial direction is formed in a shaft shoulder of the valve element. Rigidity adjusting mechanisms with adjustable spring rigidity are respectively arranged in the two end covers; the Hall displacement sensor monitors the displacement of the valve core in real time; and the proportional servo controller regulates and controls the output of the proportional servo valve according to the displacement feedback signal. According to the dual-mode proportional servo valve, two working modes of high-frequency fine adjustment and stable large flow are achieved through cooperative regulation and control of the through-flow area and the spring rigidity, and the dual-mode proportional servo valve adapts to various complex working conditions.

A spool valve for a height adjustment seat post for a saddle of a bicycle includes a spool valve housing, a spool valve body positioned within the spool valve housing, and a spool valve sleeve supported by the spool valve housing, with the spool valve body including a radial fluid port and the spool valve sleeve including a fluid port, and the spool valve sleeve fit over the spool valve body and slidable relative to the spool valve housing and the spool valve body to communicate the fluid port of the spool valve sleeve with the radial fluid port of the spool valve body.

A multi-tire inflation / deflation system. The multi-tire inflation / deflation system includes an air compressor, the air compressor configured to take in ambient air and discharge compressed air at a pressure higher than ambient pressure and a power input for the air compressor, where the power input is configured to provided electrical power to the air compressor. The multi-tire inflation / deflation system also includes a control, where the control allows the user to select a desired pressure and an output hose, where the compressed air is output from the air compressor. The multi-tire inflation / deflation system further includes a connector, where the connector allows the output to be connected to an external device and a slide valve, where the slide valve is configured to allow a user to turn off or on the air flow as desired.

The invention discloses a single-feedback closed-loop proportional throttle valve of an integrated amplifier, and relates to the technical field of throttle valve production. An integrated amplifier single-feedback closed-loop proportional throttle valve comprises a main valve, a pilot proportional valve, a displacement sensor and an amplifier, and single-feedback closed-loop control over displacement of a main valve element is formed through a built-in oil way and electric signal feedback. On the basis that a main valve and a pilot proportional valve adopt a threaded plug-in integrated design, an integrated amplifier and a displacement sensor are taken as cores, a single-feedback closed-loop control loop is constructed, a slide valve structure of the pilot proportional valve is matched with precise electromagnetic control, the movement flexibility and clamping stagnation resistance of a valve element are remarkably improved, and the service life of the pilot proportional valve is prolonged. The technical problems that a traditional double-feedback proportional throttle valve is complex in structure and prone to clamping stagnation are effectively solved, accurate proportional throttle control under the high-pressure large-flow working condition is achieved, and the double-feedback proportional throttle valve has the remarkable advantages of being compact in structure, fast in response, high in anti-pollution capacity and high in reliability.

The application discloses a through-layer drilling ring flow supply self-cleaning and blocking integrated hole bottom extraction non-jetting drill tool, which comprises a multifunctional rod body, an extraction inner group pipe, a radial cavity forming nozzle, an axial blocking nozzle, a conical hole screen plate strip, an air inlet transition piece, a cross-border air inlet pipe, a compression spring slide valve assembly and a ring flow opening and closing drill bit. The special slide valve control mechanism is adopted, the original radial cavity forming jet flow is reserved, and the instantaneous axial blocking jet flow is added, so that the conical hole screen plate strip is self-cleaned and blocked. The cross-border air inlet pipe and the transition air inlet piece are combined and sealed, so that the radial air inlet channel passes through the axial flow supply channel without air and water leakage. The ring flow supply anti-backflow opening and closing drill bit is designed, and the jet flow water medium pollution problem and the drill bit opening and closing problem are solved.