580 results about "Spool valve" patented technology

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.

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 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.

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.

A position estimation apparatus includes: a supplying unit that supplies a high-frequency signal Sh to a solenoid for driving a spool of an electromagnetic valve; an acquisition unit that acquires electrical information Je related to the solenoid supplied with the high-frequency signal Sh, and an estimation unit that estimates a position of the spool based on a result of comparison between the electrical information Je acquired by the acquisition unit and the high-frequency signal Sh supplied from the supplying unit.

The invention discloses an engine hydraulic variable valve mechanism, an engine and a method, and solves the problem that in the prior art, a piston and a tappet do not move synchronously, so that the valve closing angle is greatly changed along with the change of the rotating speed when a valve mechanism is partially opened. The hydraulic variable valve mechanism of the engine has the beneficial effect that the closing angle of the valve cannot be advanced along with the change of the rotating angle of the crankshaft at different rotating speeds, according to the specific scheme, an oil drainage hole is formed in the side, close to a piston, of a shell, the piston blocks the oil drainage hole, and the oil drainage hole can be communicated with a piston cavity in the moving process of the piston in the piston cavity; a slide valve is arranged at the oil drainage hole, is arranged between the tappet and the piston through the shell and can be communicated or disconnected with the low-pressure cavity, the control oil way is provided with a power-off normally-closed electromagnetic valve, the power-off normally-closed electromagnetic valve controls the slide valve, when the power-off normally-closed electromagnetic valve is powered off, the slide valve cuts off the high-pressure cavity and the low-pressure cavity, and when the power-off normally-closed electromagnetic valve is powered on, the high-pressure cavity is communicated with the low-pressure cavity. And the air valve is in a partial opening state.

A sleeve includes a first surface treated portion treated with electroless nickel plating at least on both ends in an axial direction, in an inner circumferential surface thereof. The first surface treated portion has an inner diameter smaller than other portions of the inner circumferential surface by a film thickness of first plating, and slidably supports a spool valve element.

A clutch mechanism has a clutch operating member that is rotated by an operation of a clutch lever and is brought into a driving force interruption state. A return mechanism causes the clutch mechanism that has been brought into the driving force interruption state to return to a driving force transmission state. The return mechanism comprises a returning gear that is provided on a motor shaft of an electric motor, a clutch returning rotator that meshes with the returning gear and rotates, and a kick member that is rotatably supported by the clutch operating member, rotates in conjunction with rotation of the clutch operating member to engage with / disengage from the clutch returning rotator, and causes the clutch operating member that has been brought into the driving force interruption state to return to the driving force transmission state. The clutch returning rotator and the kick member are disposed between a spool shaft and the motor shaft.

The utility model belongs to the technical field of hydraulic brake valves, and particularly relates to a hydraulic brake valve with an angle sensor, which comprises a mounting frame, a valve body is fixedly mounted on one side of the mounting frame, a slide valve cavity is arranged in the valve body, an output port communicated with the slide valve cavity is arranged above the valve body, and the angle sensor is arranged in the slide valve cavity. An input port communicated with the sliding valve cavity is formed in the side face, an oil return port communicated with the sliding valve cavity is formed below the sliding valve cavity, a valve element is slidably inserted in the sliding valve cavity, and the input port is formed between the output port and the oil return port; the other face of the mounting frame is movably connected with an operation panel, and a side frame is arranged on one side of the mounting frame. According to the novel automobile lamp, the stable adjusting control effect is achieved, the structure is compact, the braking effect is sensitive, a user can conduct fine adjustment according to needs through the operation panel, meanwhile, the angle sensor is arranged, the application scene that the new energy engineering automobile lamp needs signal feedback is met, and the user can know the adjusting control condition in real time.

The present invention discloses a clutch oil pressure control system for a transmission, comprising a priority valve, a shift solenoid valve A, a shift solenoid valve B, a shift solenoid valve C, and a control assembly. One end of the priority valve is connected to a main oil pressure regulating valve, and the other end of the priority valve is connected to the control assembly. The shift solenoid valves A, B, and C are connected in parallel, and one end of each of the shift solenoid valves A, B, and C is connected to the main oil pressure regulating valve. The present invention ensures that only one clutch cylinder receives oil in the intersecting oil passages between the reversing spools A, B, and C, while the remaining clutch cylinders drain oil. Even if two or more valve cores become stuck, the transmission will not stop operating. By configuring the lock solenoid valve and the associated oil circuits, the original gear position can be maintained during a power outage, achieving a gear lock function. The shift position can also be returned to neutral during a power outage, achieving a neutral lock function.

The application relates to a valve core valve sleeve subassembly necking assembly equipment and an assembly method, and belongs to the field of electromagnetic valve assembly. The equipment comprises a rack, a press-fitting seat, a valve sleeve subassembly feeding mechanism, a valve core subassembly feeding mechanism, an assembly mechanism and a necking mechanism. The press-fitting seat is arranged on the rack. The valve sleeve subassembly feeding mechanism is arranged on the rack and is used for feeding the valve sleeve subassembly. The valve core subassembly feeding mechanism is arranged on the rack and is used for feeding the valve core subassembly. The assembly mechanism is arranged on the rack and is used for press-fitting the valve core subassembly to the valve sleeve subassembly. The necking mechanism is arranged on the rack and is used for necking the valve sleeve subassembly. The application has the effect of improving the precision of press-fitting the valve core subassembly in the valve sleeve subassembly.

This invention discloses a working mode switch for a medical negative pressure regulator, including a valve seat, a slide valve, a sealing gasket, an adjusting component, and an elastic clamping component. The sealing gasket is fixedly mounted on the valve seat, and the slide valve is placed on the sealing gasket and can rotate around the valve seat axis, forming a three-position, five-way torsion planar slide valve structure with the valve seat. The structure has three working positions: closed, adjusting, and straight-through. In addition to the air source port, adjusting port, and straight-through port, it also includes a control port and a vent port. When the three-position, five-way torsion slide valve structure is in the closed position, the control port is closed; when the three-position, five-way torsion slide valve structure is in the open state, the control port connects to the vent port. The closing and venting functions of the control port can be used to externally control the negative pressure generator switch, working in conjunction with it. The adjusting component drives the slide valve, enabling it to rotate within the valve seat and switch between the closed, adjusting, and straight-through working positions. The elastic clamping component is located between the adjusting component and the slide valve, providing elastic clamping force to the slide valve facing the valve seat. This solution enables synchronous operation with medical negative pressure regulators and employs an elastic compression sealing method, offering flexible operation and excellent planar sealing of the slide valve.

The application relates to the technical field of energy station building monitoring, in particular to an energy station building equipment fault monitoring method and system, which comprises the following steps: obtaining operation monitoring data of a screw water chiller in an energy station building, setting a slide valve hot range power-on event and a slide valve cold range power-on event according to the operation monitoring data based on a slide valve stable condition; generating a hot range power-on stroke rate according to the slide valve hot range power-on event and a cold range power-on stroke rate according to the slide valve cold range power-on event; counting an abnormal stroke rate number of the hot range power-on stroke rate being less than or equal to the cold range power-on stroke rate; judging whether the abnormal stroke rate number is greater than or equal to an abnormal number threshold value; and if the judgment is yes, generating a slide valve fault alarm. The application can solve the problems of affecting production and long time consumption caused by fault monitoring after the compressor is stopped and disassembled in the prior art.

A valve device (30) is provided with a cylindrical passage-forming member (40) and a cylindrical spool valve (60) that is slidable with respect to the passage-forming member (40). The passage-forming member (40) has a communication port (56) that communicates the inside and the outside in the radial direction. The slide valve (60) has at least one cut portion (62, 63) cut from one end surface (61) in the axial direction (Rs). The degree of communication of the cutout portions (62, 63) with respect to the communication port (56) can be adjusted by relative displacement of the spool valve (60) with respect to the passage forming member (40).

The present invention provides an automatic stop device that simplifies the structure, improves the responsiveness and reliability of stopping fluid delivery, and enables rapid stopping of fluid delivery in emergencies, as well as a siphon-type fluid delivery pump equipped with this automatic stop device. [Solution] The device includes a float 212 that detects the liquid level in the container to which the liquid is being delivered, and a storage section 213 that houses the float and holds air. A communication hole 214 is opened at the top of the storage section, and the held air is sent to the discharge valve 14 of the pump 1 via an air inlet tube 215. A slide valve 211 that operates in response to the float rising connects the top of the storage section and the air inlet tube via the communication hole when the float rises to a predetermined position. As a result, the discharge valve is closed by the released air, the liquid flow in the discharge hose 15 is restricted, and the liquid delivery of the siphon-type liquid delivery pump is stopped. This provides an automatic stop device 2 and a siphon-type liquid delivery pump having an automatic stop device.

The utility model provides a kind of servo valve flow channel and servo valve, including valve core and valve sleeve;The servo valve flow channel includes the passage being set in the valve body inside servo valve, including inlet flow channel, oil return flow channel, first actuating port flow channel, second actuating port flow channel;Two cavities are arranged in the position of the length direction of the two ends of valve body inside close to valve sleeve, the valve body inside is also provided with balance passage, balance passage is used to connect the two cavities inside valve body, oil liquid in one cavity can flow to another cavity by balance passage when valve core is translated in valve sleeve;Utilize such a kind of servo valve flow channel and servo valve, by setting cavity and balance passage as control oil cavity and control channel in the two ends of valve sleeve, the pressure fluctuation when spool moves is reduced to controllable range, to balance two sides oil pressure, reduce rigid impact and valve core resistance.

A gas turbine engine having a first pressure spool and a second pressure spool includes a power transfer system to transfer mechanical power between the first pressure spool and the second pressure spool. The first pressure spool can include a first electric machine to convert mechanical power from the first pressure spool to a first electric power. A coupled electric machine having a first coupled rotor and a second coupled rotor can be rotatingly coupled to the first pressure spool and the second pressure spool, respectively. The coupled electric machine is configured to receive an output power (e.g., an output power from an AC / AC converter) to drive a winding of the coupled electric machine to enable power transfer between the first pressure spool and the second pressure spool. An AC / AC converter can be electrically disposed between the first pressure spool and the second pressure spool.

A spool valve assembly operable for automatic control of oil flow includes: a housing; a spool valve configured to slide axially within the housing; a first inlet port on the housing configured to connect to a first oil passage, wherein the first oil passage is operable as an outlet of a first oil control valve; a second inlet port on the housing configured to connect to a second oil passage, wherein the second oil passage is operable as an outlet of a second oil control valve; a valve core outlet on the housing configured to connect to a third oil passage; and a return spring configured to return the spool valve to a rest position.

The invention discloses a high-temperature friction testing device for a hydraulic slide valve. The device is composed of a valve element clamping module, a valve body mounting module, a vertical force applying module, a high-temperature heating module and a friction force applying module. The valve element clamping module is composed of a valve element, a valve element centering fixing column, a valve element fixing clamp, a valve element mounting rod and a mounting rod fixing shell. The valve body mounting module consists of an oil storage tank, an oil storage tank fixing plate and a valve body; the vertical force applying module comprises X, Y and Z three-axis guide rails driven by a motor, and pressure and friction force sensors; the high-temperature heating module surrounds the whole valve body and the valve core mounting part; the friction force applying module is driven by a motor to drive the oil storage tank to achieve axial movement of the valve body, and relative friction between the valve element and the valve body is achieved. The device can carry out friction tests of the hydraulic slide valve at different temperatures, realizes friction wear simulation of the hydraulic slide valve under multiple working conditions of oil environment, high temperature, pollution and the like, and provides data support for wear and degradation tests of the hydraulic slide valve.

The invention relates to a slide element (1) for a damper valve (10), wherein the slide element (1) has a control section (2) configured to extend displaceably in a control channel (11) of the damper valve (10) transversely to a flow direction (S) of a damping medium in order to adjust a flow cross-section of the damper valve (10), wherein the slide element (1) has a mounting section (3) arranged on a side of the slide element (1) opposite the control section (2), wherein the mounting section (3) can be attached to an actuating means (12) of the damper valve (10) for displacing the slide element (1) in a direction transverse to the flow direction (S), and wherein a connecting section (4) is formed between the control section (2) and the mounting section (3).which has a lower stiffness against deformation in the flow direction (S) than the control section (2) and the fastening section (3).

The invention relates to the technical field of aircraft anti-skid brake control systems, in particular to a stop valve for a brake system of a high-pressure system aircraft, which comprises a valve casing, a slide valve and an electromagnetic valve assembly are arranged in the valve casing, and the slide valve comprises a valve sleeve and a reset assembly; an end cover is arranged at one end of the valve shell; the valve sleeve is arranged in the valve shell, a valve element is movably arranged in the valve sleeve, an oil inlet cavity is formed between the valve element and the oil inlet, a control cavity hole and an output cavity hole are formed in the valve sleeve, and the control cavity hole is used for being communicated with an output channel of the electromagnetic valve assembly through a control oil way arranged on the valve shell. The output cavity hole is used for supplying oil to a brake servo valve of a brake system through an output oil way arranged on the valve shell when the output cavity hole communicates with the oil inlet cavity, and a second seal and a third seal are arranged on the periphery of the valve sleeve. The reset assembly is arranged between the valve element and the end face of the end cover. The length of the slide valve is reduced, so that the structure is more compact; and the reliability of the stop valve in a high-pressure system airplane brake system is improved.

This invention discloses a constant flow pressure reducing valve, relating to the field of hydraulic valve technology. It includes a valve seat with an oil outlet, an oil inlet, and a drain port arranged sequentially from right to left. An elastic pressure regulating component is located at the left end of the valve seat, and a spool valve core is abutted at the right end of the elastic pressure regulating component. An axially movable elastic flow control valve core is located at the right end of the spool valve core. A drain channel communicating with the inner cavity of the valve seat is opened at the left end of the spool valve core, and the drain channel is connected to the drain port. The valve core slides within the valve seat, allowing oil to flow out from the drain port to relieve pressure. An oil inlet channel communicating with the oil inlet is located at the right end of the spool valve core, and a throttling channel communicating with both the oil inlet and outlet is provided on the elastic flow control valve core. The movement of the elastic flow control valve core within the valve seat maintains a constant pressure difference between the throttling channel and the oil inlet channel, thereby achieving a constant output flow rate. This constant flow pressure reducing valve achieves pressure reduction in the oil circuit and a constant output flow rate, facilitating processing and disassembly, and simplifying the hydraulic circuit.

The utility model discloses a slide valve vacuum pump convenient to maintain, which belongs to the technical field of maintenance of slide valve vacuum pumps and comprises a base, a pump body and a motor. The pump further comprises a moving mechanism arranged below the motor and a protection mechanism arranged between the pump body and the motor. The moving mechanism comprises a sliding base, a connecting base slidably connected to the top of the sliding base, a threaded connector fixed to the top of the connecting base, a threaded rod rotationally connected to the outer wall of the connecting base and a rotary disc fixed to one end of the threaded rod, and the threaded connector is in threaded connection to the outer wall of the threaded rod. When a transmission belt between the pump body and the motor is disassembled, assembled, maintained and replaced, the motor can be stably close to or far away from the pump body through the moving mechanism, and when the belt between the motor and a belt pulley of the pump body is disassembled and assembled by an auxiliary person, the belt can be stretched and pulled more easily and conveniently without effort.