109 results about "Cylinder flow" patented technology

The invention relates to the technical field of steam turbine testing, in particular to a testing system for mismatch correction of a wide-load-interval thermal power generating unit speed regulation model, which comprises a thermodynamic system component, a speed regulation system device, a dynamic signal acquisition device and a control device, a dynamic signal processing module analyzes the relevance between main steam pressure sudden change and control valve opening oscillation in real time, a dynamic response database including a time sequence is constructed, and a control valve opening feed-forward compensation instruction and a combustor fuel distribution gradient adjustment signal are generated according to correction parameters. Power over-modulation wave crests caused by sudden load change are suppressed, and primary frequency modulation action delay is reduced; and the simulation verification module compares measured data with model output through an error feedback mechanism, dynamically adjusts high-pressure cylinder flow characteristic curve calibration parameters, optimizes a control strategy in combination with a network-related safety margin evaluation result, and realizes improvement of dynamic response precision in a full peak regulation interval and enhancement of power grid frequency stability.

The invention discloses a high-pressure anti-vibration ship basket type filtering device, and relates to the technical field of basket type filtering devices. The invention relates to a high-pressure anti-vibration ship basket type filtering device, which comprises a tank body provided with a water inlet and a water outlet, and further comprises a limiting ring fixedly connected to the inner wall of the tank body, spiral flow guided by the spiral flow deflectors enables fluid to flow in the basket type filter cartridge in a wall-attached mode, the problem of short-circuit flow of traditional straight cartridge flow is solved, the effective contact area of the fluid and the basket type filter cartridge is increased, meanwhile, centrifugal force generated by the spiral flow throws impurities to the cartridge wall of the basket type filter cartridge, the impurities are evenly distributed on the surface of the basket type filter cartridge, and the filter efficiency is improved. Local blockage is avoided; besides, the spiral flow formed by the fluid passing through the spiral flow deflector generates continuous downward pressure on the basket type filter cartridge, the pressure is increased along with the increase of the flow, and after the pressure is superposed with the self weight of the basket type filter cartridge, the attachment pressure of the basket type filter cartridge passing through the mounting block and the limiting ring is increased, and the stability under the vibration working condition is effectively improved.

The utility model discloses a rotor compressor silencer which comprises a silencer body, a plurality of convex petals and a plurality of concave petals are distributed on the silencer body, high-pressure pulsating gas flowing out of an air cylinder sequentially flows through the convex petals and the concave petals of the silencer, due to the change of the volumes of inner cavities of the convex petals and inner cavities of the concave petals, when the high-pressure pulsating gas flows through, propagation loss can be generated, and gas noise is reduced. A center hole is formed in the center of the silencer body, and the silencer is installed on an upper bearing of an upper shaft of a rotor compressor crankshaft in a sleeving mode through the center hole. At least one group of air outlet holes are formed in the convex flaps, and high-pressure pulsating gas is discharged after the direction of the high-pressure pulsating gas is changed; inwards-concave reinforcing ribs are arranged on the concave petals, so that the size of an inner cavity of the concave petals is further reduced, the silencing capacity of the concave petals is enhanced, meanwhile, the rigidity of the silencer is improved, and sound radiation of the silencer is reduced.

The utility model provides a crank connecting rod filling device of a pigment filling machine, the filling machine comprises a charging barrel and a piston mechanism arranged below the charging barrel, and the piston mechanism is connected with a discharging nozzle. The piston mechanism has a filling state in which pigment in the charging barrel flows out of the discharging nozzle and a closed state in which a channel between the charging barrel and the discharging nozzle is blocked, the crank connecting rod filling device comprises a driving device connected with the piston mechanism, and the driving device comprises a driving motor and a crank connecting rod device linked with the driving motor; the crank connecting rod device comprises a rotating disc and a rotating rod eccentrically arranged on the rotating disc, the rotating rod is in linkage with the piston mechanism so that the piston mechanism can be switched between the filling state and the closed state, and the filling efficiency can be effectively improved through the crank connecting rod filling device.

The utility model relates to a reaction kettle which comprises a kettle body and a driving mechanism arranged on the kettle body, a guide cylinder and a stirrer linked with the driving mechanism are arranged in the kettle body, a plurality of transverse baffle rings are arranged on the inner circumferential wall of the guide cylinder, and a plurality of openings positioned on the lower side of each transverse baffle ring are formed in the circumferential wall of the guide cylinder. An annular frame linked with the driving mechanism is further rotatably arranged on the peripheral wall of the flow guide cylinder, a plurality of arc-shaped plates capable of covering the openings are arranged on the annular frame, the number of the arc-shaped plates corresponds to that of the openings, and when the annular frame rotates, the arc-shaped plates alternately open or close the openings, so that the flow in the flow guide cylinder flows from top to bottom under the action of the stirrer, and the flow in the flow guide cylinder is uniform. The flowing sectional area of the fluid at each transverse baffle ring is shrunk and expanded, so that the fluid is accelerated and then decelerated, and multi-stage shearing and turbulent flow are generated; meanwhile, the opening circulation on the guide cylinder is opened and closed, so that the dynamic change of the flow field structure between multi-stage shunting circulation and single bottom return is realized, and the mixing efficiency of the reaction kettle is improved.

The invention discloses an auxiliary oil return control system, an auxiliary oil return control method and a drilling machine in the technical field of engineering machinery, and aims to solve the problems that in the prior art, the pressure building phenomenon often occurs, danger is brought to work of the drilling machine, and the safety of the system is affected. The hydraulic system comprises a main valve and a pump, a port A of the main valve is connected with a rod cavity of a first oil cylinder and a rod cavity of a second oil cylinder at the same time, and a port B of the main valve is connected with a rodless cavity of the first oil cylinder and a rodless cavity of the second oil cylinder at the same time; the control assembly comprises a port P2, a port A1 and a port B, a port P of the pump is connected with the port P2, and a rodless cavity of the first oil cylinder and a rodless cavity of the second oil cylinder are both connected with the port A1; the port A1 and the port B of the control assembly can be communicated, so that part of oil in the rodless cavity of the first oil cylinder and the rodless cavity of the second oil cylinder flows into the oil tank through the control assembly, it is guaranteed that the oil flows out stably, the pressure building condition is prevented, and the stability and safety of the hydraulic system during working are guaranteed.

Engine system, with: an engine with a plurality of cylinders (11-14) suitable for generating a driving torque by burning fuel; a first intake manifold (31) which is connected to an intake pipe (20) through which intake air flows into a part of the majority of cylinders; a second intake manifold (32) which supplies the intake air through the first intake manifold (31) to another part of cylinders of the plurality of cylinders (11-14); a first exhaust manifold (41) which is connected to a part of the cylinders which is connected to the first intake manifold; a second exhaust manifold (42) which is connected to another part of the cylinders which is connected to the second intake manifold (32); a return line (60) branched off from the second exhaust manifold (42) to be coupled to the second intake manifold (32); a recirculation inlet valve (61) located at the point where the recirculation line (60) and the second exhaust manifold (42) are connected; and a manifold connecting valve (63) which is arranged on an inlet line (20) between the first inlet manifold (31) and the second inlet manifold (32), wherein, when some cylinders are deactivated, the recirculation inlet valve (61) is open to supply exhaust gas from the second exhaust manifold (42) to the second inlet manifold (32), and the manifold connecting valve (63) is cut off in order to prevent intake air from being supplied through the first intake manifold (31) to the second intake manifold (32), and the entire exhaust gas flow rate from the deactivated cylinders flows back into the deactivated cylinders.

The utility model relates to the technical field of insulators, and discloses an anti-impact bearing plastic retainer which comprises a limiting retainer, a ball groove is formed in the inner side of the limiting retainer, first oil leakage holes are evenly distributed in the inner side of the ball groove, a lubricating oil injection end is arranged at the top of the limiting retainer, and a second oil leakage hole is formed in the outer side of the limiting retainer. A connecting pipe is arranged on the outer side of the lubricating oil injection end, and the end, away from the limiting retainer, of the connecting pipe is fixedly connected with the oil discharging base. According to the anti-impact bearing plastic retainer, the ball grooves in the inner side of the limiting retainer are used for installing balls, lubricating oil in the lubricating oil storage cylinder flows into the oil discharge base through the third oil outlet hole and the second oil outlet hole, then flows into the limiting retainer through the connecting pipe and the lubricating oil injection end, and is immersed into the inner sides of the ball grooves through the first oil leakage holes; and the sealing cover is arranged to play a role in protecting the lubricating oil, and the sizes of interfaces at oil flowing positions of the third oil outlet hole and the second oil outlet hole can be adjusted by rotating the lubricating oil storage cylinder, so that the injection amount of the lubricating oil is controlled.

The utility model relates to the technical field of shock absorbers, and discloses a segmental control damping automobile shock absorber, which is characterized in that a pull ring is fixedly arranged on the bottom surface of a lower protective sleeve, an upper protective sleeve is arranged on the upper side of the lower protective sleeve, a fixed block is fixedly arranged on the top surface of the inner side of the upper protective sleeve, a telescopic rod is fixedly arranged on the bottom surface of the fixed block, and the telescopic rod is fixedly arranged on the bottom surface of the fixed block. A fixing block is fixedly installed on the bottom face of the inner side of the lower protective sleeve, an oil storage cylinder is fixedly installed on the top face of the fixing block, the telescopic rod is movably arranged on the inner side of the oil storage cylinder, and an auxiliary spring is fixedly installed between the telescopic rod and the oil storage cylinder. According to the segmented damping control automobile shock absorber, the shock absorber is installed at the position, needing shock absorption, of an automobile body through the pull rings on the upper protective sleeve and the lower protective sleeve, and when the automobile body encounters a bumpy road surface in the running process, the automobile body presses the spring downwards after being pressed by gravity, so that shock absorption is achieved. And at the moment, hydraulic oil stored in the oil storage cylinder flows out upwards through the groove to form resistance.

The invention discloses a snorkeling piston and diversion circulation engine and a power generation method thereof. The snorkeling piston and diversion circulation engine comprises a supporting mechanism system, a three-cylinder diversion system, a snorkeling piston, a diversion gate, a diversion gate controller, a starting and braking system, an intelligent control system and the like. After liquid is injected into the three-cylinder flow guide system, the submerging piston continuously does circulating reciprocating motion under the synergistic effect of liquid buoyancy and self gravity, and the liquid in the three-cylinder flow guide system continuously and circularly flows in the three fluid cylinders. The submerging pistons on the left side and the right side of the engine center shaft and the liquid continuously generate gravitational torque difference and torque difference, the engine rotating large disc and the engine center shaft are driven to rotate, and high-quality power is continuously provided for generators, communication and transportation equipment, industrial equipment and the like. The whole power generation and use process does not need to consume any fossil energy and nuclear materials, and does not need to use unstable natural forces such as wind power, river water, sea waves, tides, terrestrial heat, solar energy and the like.

The utility model discloses a cold drink machine which comprises a box body, a supporting seat and a water collecting tray, the supporting seat is installed on the box body, a material preparing area is arranged on the supporting seat, a refrigerating area is arranged in the box body, and a refrigerating assembly is arranged in the refrigerating area. A driving assembly and a horizontally arranged material making barrel are arranged in the material making area, a stirring assembly is arranged in the material making barrel, the driving assembly is in transmission connection with the stirring assembly, and the refrigerating assembly supplies cold to the material making barrel; a detachable mounting opening is formed in one side of the box body, the water collecting disc is mounted in the supporting seat through the detachable mounting opening, and a water receiving groove in the water collecting disc is located below the material making barrel. According to the utility model, the material flowing out of the material making barrel can be collected, the cleaning process is reduced, and the use comfort of a user is improved.

The utility model relates to the technical field of mechanical tools, and discloses an automatic sieve shaker. The automatic vibrating screening machine comprises a base, a motor, a discharging seat, a cylinder, a fixing clamp and a top cover, the motor is arranged in a cavity of the base, the discharging seat is arranged on the base and provided with a material receiving hopper and a discharging connector, the cylinder is arranged on the discharging seat, the bottom face of the cylinder is a screen, the top cover covers the cylinder, the top cover is provided with a feeding hopper, and the fixing clamp is arranged on the feeding hopper. The fixing clamp is arranged on the discharging base and used for fixing the cylinder and the top cover. According to the automatic vibration screening machine, materials are added into the cylinder from the feeding hopper of the top cover, the motor drives the base and the cylinder to vibrate to screen the materials, and the materials leaked out of the screen of the cylinder flow out of the discharging base through the material receiving hopper and the discharging connector of the discharging base and enter the collecting bag to be stored, so that the screening efficiency is improved; and basically no dust is emitted in the operation process, so that the environment is purified, and the body health of an operator is facilitated.

The invention provides a gas compressor which comprises a gas compressor cylinder and further comprises an inner wall ring, the inner wall ring is located in the gas compressor cylinder, and the inner wall ring surrounds a gas compressor cylinder flow channel; the air compressor cylinder comprises a first air exhaust cavity and a second air exhaust cavity, the first air exhaust cavity is located between the air compressor cylinder and the inner wall ring, the second air exhaust cavity is located in the inner wall ring, and the first air exhaust cavity and the second air exhaust cavity both surround the air compressor cylinder flow channel; the second air exhaust cavity is in fluid communication with the first air exhaust cavity and the air compressor cylinder flow channel, and the first air exhaust cavity is in fluid communication with an external pipeline. The internal and external pressure difference of the gas compressor cylinder is jointly borne by the inner wall ring and the outer wall of the gas compressor cylinder, and the thickness of the cylinder wall of the gas compressor cylinder and the thickness of the flange can be reduced.

The invention relates to a forging return stroke electro-hydraulic system adopting discrete liquid volume units and a control method.The system comprises a plurality of oil tanks connected with a controlled pressure containing cavity in parallel at the same node, and the first end and the second end of each oil tank are connected with a reversing valve and a one-way valve correspondingly to form a volume unit capable of being independently gated; all the oil tanks jointly form a parallel oil tank group; the plunger type cylinder is connected with a node of the parallel oil tank set, oil in the plunger type cylinder flows into the return oil tank to be compressed when the hammer head enters, and oil in the return oil tank flows into the plunger type cylinder to provide return force for the hammer head when the hammer head retreats. According to the working frequency requirement, the forging force requirement and the oil elasticity modulus fluctuation condition of the hammer head, the return stroke oil tank is controlled to reach the maximum volume allowed by the working condition through the combination of discrete volume units, and meanwhile the set pressure of the system is adjusted according to the maximum pressure value of the plunger cavity; the pressure curve of the plunger cavity can cover the minimum return stroke pressure requirement in real time, and the return stroke requirements of the hammer head under various working conditions of different working frequencies, forging forces and different oil liquid elasticity moduli in a large range are met.

The invention provides an exhaust gas purification device for an internal combustion engine, which can improve the purification performance of exhaust gas without increasing the size of a catalyst, suppress the variation of each cylinder, and appropriately detect the air-fuel ratio. An exhaust purification device (1) for an internal combustion engine is provided with: an exhaust manifold (2) having one or more exhaust flow paths through which exhaust gas discharged from a plurality of cylinders flows; a catalytic converter (3) attached to the downstream side of the exhaust flow path; and a collision diffusion chamber (4) provided between the exhaust gas flow path and the catalytic converter (3) and having a collision surface (4a) in which the main flow of the exhaust gas flowing in through the exhaust gas flow path collides with the inner wall, in which a throttle section (5) having a smaller flow path cross-sectional area than the portion in which the exhaust gas flows in the collision diffusion chamber (4) is formed on the downstream side of the collision diffusion chamber (4), and in which the flow path cross-sectional area of the throttle section (5) is smaller than the flow path cross-sectional area of the exhaust gas flowing in the collision diffusion chamber (4). An air-fuel ratio sensor (7) for detecting the air-fuel ratio of the engine is provided on the downstream side of the throttle section (5).

This invention discloses a method and system for controlling the side mold stroke of a casting equipment. The method includes: acquiring real-time position data of the side mold, pressure data of the hydraulic system, and temperature data of the mold contact surface through a multi-sensor fusion module; constructing a dynamic friction and thermal deformation coupling model during the side mold movement based on the real-time position data, pressure data, and temperature data, and predicting the position deviation trend in the current stroke stage; generating a dynamic compensation strategy for the side mold stroke based on fuzzy adaptive PID according to the position deviation trend and the preset mold closing accuracy requirements; executing the dynamic compensation strategy by adjusting the hydraulic cylinder flow and pressure in real time through a high-frequency servo valve group, and completing the position closed-loop correction within one stroke cycle. Using this invention, real-time prediction and accurate compensation of complex disturbances in the side mold stroke can be achieved, improving mold closing accuracy and stability, while ensuring the reliability of the equipment and the consistency of casting quality under high-speed continuous production.

The present invention provides a pneumatic system, which includes a balance cylinder, a connecting pipeline, a muffler, and an accumulator having a second air vent. The balance cylinder includes a first air vent; a first pipe orifice of the connecting pipeline is connected to and communicates with the first air vent, and a second pipe orifice of the connecting pipeline communicates with the external environment; both the muffler and the connection position are arranged on the connecting pipeline; the pipe section between the connection position and the first pipe orifice of the connecting pipeline is arranged to be openable and closable; the connection position between the second air vent and the connecting pipeline is arranged to be openable and closable. When the compressed gas in the balance cylinder flows into the connecting pipeline through the first air vent, a part of the compressed gas enters the accumulator through the second air vent and is stored with energy; when the balance cylinder is in a stopped state, the compressed gas stored with energy in the accumulator flows through the second air vent to the muffler to purge the muffler. The pneumatic system of the present application solves the problem of inconvenience in the cleaning method of the muffler in the prior art.

A valve flushing method and apparatus, and an electronic hydraulic braking system. When a vehicle is powered off, the electronic hydraulic braking system automatically enters a power retention state, at which point a valve flushing process is triggered. The process comprises: first controlling CSV valves to close and PSV valves to open (S101); then controlling a pressure build-up cylinder to perform pressure build-up, such that fluid in the pressure build-up cylinder flows into wheel ends via the PSV valves and IV valves (S102); when it is detected that the hydraulic pressure of the pressure build-up cylinder remains stable, controlling the PSV valves to close, so as to maintain the pressure (S103); then controlling OV valves to open to relieve the pressure, such that the fluid flows out of the wheel ends via the OV valves so as to flush valve bodies by means of fluid flow (S104); and upon expiration of a set opening duration of the OV valves, controlling the OV valves to close, and controlling the pressure build-up cylinder to perform fluid replenishment (S105).

The invention relates to the technical field of engines, and discloses an engine combustion characteristic parameter prediction method and system, a vehicle and a medium, and the method comprises the steps: determining a reference engine of a target engine; constructing a reference combustion model of the reference engine; simulating the reference combustion model, and outputting the highest temperature and the combustion duration of the corresponding non-combustion area under each rotating speed and torque; a highest temperature matrix of the unburned area is constructed based on the highest temperatures of the unburned area corresponding to the rotating speeds and the torques, and a combustion duration matrix is constructed based on the combustion durations corresponding to the rotating speeds and the torques; and predicting combustion characteristic parameters of the target engine according to the highest temperature matrix of the unburned area and the combustion duration matrix. According to the method, the reference engine with the similar in-cylinder flow level with the new type is screened, the combustion characteristic parameters of the new type are predicted through the combustion model verified through experiments, the prediction precision of the combustion parameters is improved, and the requirement for automatic generation of the combustion characteristic parameters of the new type is met.

The rotary damper comprises a cylinder body and a piston shaft movably arranged on the cylinder body, and an upward moving guide inclined face is obliquely arranged on the inner side wall of the bottom of the cylinder body; the lower end part of the piston shaft is provided with a moving part and a piston provided with an oil passing hole, the lower end part of the moving part is provided with an upward moving pressing inclined surface matched with the upward moving guide inclined surface, and the upper end part of the moving part is propped against the piston; the piston shaft drives the moving part to rotate, and the upward-moving pressing inclined plane is matched with the upward-moving guide inclined plane, so that the moving part moves upwards along the upward-moving guide inclined plane, and the piston is driven to move upwards; damping oil in the cylinder body flows up and down through the oil passing hole, so that a damping effect is generated on the rotary motion of the piston shaft; the damping effect on the rotary motion can be directly realized by converting the rotary motion mode and the axial motion mode without additionally installing accessories; the damper application cost is reduced, and the product production difficulty is effectively reduced; the rotary damper is simple in structure and low in production cost.

The utility model belongs to the technical field of fitness equipment, and particularly relates to a linkage oil cylinder which comprises a first oil cylinder and a second oil cylinder, the first oil cylinder and the second oil cylinder are connected through a connecting pipe, the connecting pipe is connected with a connecting base, and the connecting base is provided with a first flow guide hole, a second flow guide hole and a connecting groove. Hydraulic oil in the first oil cylinder and the second oil cylinder flows interactively through the connecting pipe, the first flow guide hole, the second flow guide hole and the connecting groove, an adjusting valve is arranged in the connecting groove, a flow guide groove with the cross section gradually reduced is formed in the adjusting valve, and the first flow guide hole and the second flow guide hole are communicated with the flow guide groove; the adjusting valve is controlled to move relatively in the connecting groove, so that the connecting position of the first flow guide hole and / or the second flow guide hole and the flow guide groove is changed, the minimum cross sectional area is changed when hydraulic oil flows through the flow guide groove, and the linkage oil cylinder is simple in structure, convenient to assemble and capable of adjusting damping conveniently.

The invention discloses a high-pressure cylinder flow field analysis method based on computational fluid dynamics, and particularly relates to the field of high-pressure cylinder flow field analysis, and the method comprises the steps: constructing a flow field model through a cross-manufacturer design knowledge base, recognizing a sensitive area according to a flow loss criterion, carrying out the meshing, carrying out the partitioning parallel solving of a fluid equation set, and dynamically terminating the iteration based on the entropy yield change. And finally, packaging the analysis result. According to the high-pressure cylinder flow field analysis method based on computational fluid dynamics, by automatically recognizing a secondary flow loss sensitive area and combining gridding processing, intelligence and light weight of grid generation are achieved, the manual intervention time is shortened, and the grid generation efficiency is improved; a computational domain is divided into a mainstream region, a boundary layer region and a vortex core region, and a corresponding fluid control equation set is matched, so that the utilization rate of computational resources is improved.

The invention provides a high-speed mechanical unloading device and method. The device comprises a bulk solid supporting block, a bulk solid supporting block tray, a bulk solid supporting block cover plate, a mass block, an oil cylinder, a hydraulic center, a high-pressure experiment bin, an oil cylinder piston and the like. The mass block is used for sealing ore and high-pressure water in the high-pressure experiment bin; the bulk supporting block penetrates through the wall of the high-pressure experiment bin and is supported at the middle lower part of the mass block, and the lower part of the bulk supporting block is supported in the bulk supporting block tray; the bulk supporting block cover plate and the bulk supporting block tray are installed; the oil cylinder is connected with the bulk supporting block tray; during unloading, hydraulic oil in the oil cylinder flows back to the hydraulic center, the piston of the oil cylinder descends to drive the bulk solid supporting block tray to move downwards, the bulk solid supporting block rotates outwards to be opened, and after the mass block loses support, the bulk solid supporting block is pushed by high-pressure water in the high-pressure experiment bin to be rapidly and downwards sprayed out, and unloading is completed. According to the invention, no consumables and explosion impact are realized, the integrity and coherence are good, and compared with the existing rapid unloading device, the rapid unloading device has stronger technical advantages and reliability.

The utility model relates to a feed storage tower for breeding, which comprises a lower conical cylinder, a cylinder body, an upper conical cylinder and a support, the upper end and the lower end of the cylinder body are fixedly connected and communicated with the upper conical cylinder and the lower conical cylinder respectively, the outer side of the cylinder body is fixedly connected with the support, a feed port is formed in the middle of the upper conical cylinder, a discharge port is formed in the middle of the lower conical cylinder, and the feed port is communicated with the discharge port. And the discharge hole is fixedly connected and communicated with the blanking device. Stirring and discharging are combined, the overall size of the discharging device and the stirring device is reduced, the height of the discharging port can be lowered, when the height is equal to the contained feed amount, the taper can be reduced, feed on the inner wall face of the lower conical cylinder can flow downwards more easily, and the problem that the feed is prone to being accumulated on the inner wall face of the lower conical cylinder is solved.

The application discloses a CASA model net primary productivity simulation method and system, and the method comprises the following steps: collecting real-time position data of a side mold, pressure data of a hydraulic system and temperature data of a mold contact surface through a multi-sensor fusion module; based on the real-time position data, the pressure data and the temperature data, a dynamic friction and thermal deformation coupling model in a side mold movement process is constructed, and a position deviation trend in a current stroke stage is predicted; according to the position deviation trend and a preset mold closing accuracy requirement, a dynamic compensation strategy of the side mold stroke based on a fuzzy adaptive PID is generated; the dynamic compensation strategy is executed, the hydraulic cylinder flow and pressure are adjusted in real time through a high-frequency servo valve group, and position closed-loop correction is completed within one stroke cycle. By using the embodiment of the application, intelligent prediction and adaptive configuration of CASA model static parameters in a large range and a multi-vegetation type region can be realized, and the precision, the automation degree and the cross-region generalization capability of net primary productivity simulation are improved.

This invention relates to a control device and method for the planting section of a transplanter, comprising a newly added independent oil tank and a first hydraulic pump. The power of the first hydraulic pump is provided by the PTO output shaft. Hydraulic oil in the oil tank enters the oil cylinder through a single-stable valve and a contour valve, and the oil in the oil cylinder flows back to the oil tank through a return oil line. In this way, the planting section can be adjusted in height by floating with the ground or by using a handle during operation. The tractor's rotary tillage depth is adjusted by regulating the oil flow of the tractor itself. In summary, the hydraulic circuit of the tractor and the hydraulic circuit of the planting section are two separate systems that are not connected in series. Therefore, their actions will not be interfered with by the load, and the adjustment of the tractor's rotary tillage depth is realized during the operation of the planting section.

Disclosed herein is an electric brake system including a brake including a cylinder and a piston which is provided in the cylinder to move forward or backward and is moved by hydraulic pressure so that a brake pad presses a brake disc, an electric stability control (ESC) actuator configured to generate and supply hydraulic pressure to the cylinder to brake a wheel of a vehicle, an electric parking brake (EPB) actuator configured to move the piston by a motor, and a controller configured to control the EPB actuator and the ESC actuator, wherein the controller estimates a flux in the cylinder and estimates pressure in the cylinder based on whether an EPB is applied through driving of the EPB actuator and the estimated flux in the cylinder.

The invention discloses an energy-saving transformed hydraulic system which comprises a lifting cylinder, an original lifting valve stand, an energy-saving valve stand, a pipeline switching module and an energy storage module. The lifting cylinder is used for driving the stepping beam to lift; the original lifting valve stand is used for executing traditional control on the walking beam; the energy-saving valve stand is connected with a rod cavity of the lifting cylinder through the pipeline switching module, and the energy storage module is connected with a rodless cavity of the lifting cylinder through the pipeline switching module. The pipeline switching module is used for switching traditional control and energy-saving control on the walking beam; the energy storage module is suitable for supplying oil to a rodless cavity of the lifting cylinder when the walking beam ascends; the energy-saving valve stand is suitable for supplying oil to the rod cavity of the lifting cylinder when the walking beam descends, so that oil in the rodless cavity of the lifting cylinder flows back to the energy storage module. The system has the beneficial effects that energy-saving transformation is carried out on the basis that an original lifting valve stand is reserved, and new and old systems can be switched through one key by controlling the pipeline switching module.

The present application relates to the technical field of automation production, and discloses a needle cylinder assembling device, wherein the first vibrating distributing component is arranged on the rack, the cover body flows out from the discharge port of the first vibrating distributing component; the second vibrating distributing component is arranged on the rack, the piston flows out from the discharge port of the second vibrating distributing component; the third vibrating distributing component is arranged on the rack, the material cylinder flows out from the discharge port of the third vibrating distributing component; the rotating disc component is arranged on the rack, and the rotating disc component rotates through the cover body receiving station, the piston receiving station, the material cylinder receiving station and the cylinder cover assembling station; the mechanical hand component is arranged on the rack, and the mechanical hand component transfers the cover body, the piston and the material cylinder from the first vibrating distributing component, the second vibrating distributing component and the third vibrating distributing component to the rotating disc component respectively and completes the assembling of the cover body, the piston and the material cylinder. The above arrangement improves the assembling efficiency, reduces the probability of needle cylinder leakage and improves the user experience.