5694 results about "Cylinder block" patented technology

The invention discloses an automobile bumper stamping die change locking mechanism and relates to the technical field of automobile stamping dies, a stamping base is used as a basic support, vertical force bearing columns on the periphery of the stamping base are connected with a top protection plate, a central power execution cylinder of the protection plate is connected with a workpiece bearing table through a hydraulic driving rod, and an upper die opposite to a lower die is mounted at the lower end of the bearing table. According to the mold rapid locking mechanism, adjusting supporting blocks are welded to the two sides of a base table, and transmission screws on the adjusting supporting blocks can adjust the position of a locking control box; a rotating gear in the box is meshed with an L-shaped clamping arm tooth block, a rubber clamping pad at the front end of a driving arm and a rubber extrusion block in front of the box, a lower die is clamped from the periphery and the two sides, a stroke limiting supporting column of a supporting base is matched with a bearing table guiding structure to ensure stable lifting, and the bearing table is provided with an infrared mistaken touch prevention sensor and a safety relay module to guarantee safety. The upper die is detachably installed through the lifting lug plate and the fastening nut, the scrap collecting bin automatically enters and exits through the driving motor and the transmission screw, and the stamping die changing requirement of the bumper is met.

The utility model relates to the field of machine tools, in particular to a rotary table brake device and a machine tool, the rotary table brake device comprises a base, a rotating shaft, a working table, a brake assembly, a braking oil way and a reset structure, the brake assembly comprises a brake disc, a brake cylinder body, a brake piston and a brake pad, and a cavity is formed between the brake disc and the brake cylinder body; the brake piston is located in the cavity and divides the cavity into a first cavity and a second cavity which are not communicated, a preset gap is formed between the upper end of the brake disc and the lower side portion of the brake piston, one side of the brake pad is fixed to the rotating shaft, and the other side of the brake pad is located in the preset gap. The braking oil way is communicated with the first cavity to achieve braking of the rotary table, the reset structure is located in the second cavity or connected with the second cavity to achieve reset after braking, the rotary table braking device is simple and compact in overall structure, accurate braking can be achieved during braking, rapid and stable recovery can be achieved during resetting, and the service life of the rotary table is prolonged. And the stability and reliability of machine tool turntable operation are effectively improved.

The invention discloses a modularized replaceable self-resetting energy consumption type bridge pier anti-collision system, and belongs to the technical field of bridge engineering structure safety. The system includes an annular rubber pad, an annularly disposed damper module, and a shape memory alloy (SMA) tow. The damper module comprises a cylinder body, high-viscosity fluid, a reset spring, a piston and a force transmission plate. The cylinder body is fixed to the pier in a surrounding mode through bolts and rubber pads, the inner wall of the cylinder body is connected with the piston through a reset spring, the piston rod end is hinged to the force transmission plates, and the SMA wire bundles are connected with the force transmission plates. When an external impact load acts on the force transmission plate, the fluid damper provides viscous energy consumption, and the SMA wire bundle, the spring and the rubber pad provide deformation energy consumption; after the collision is finished, the system can be reset to the initial position under the synergistic effect of the SMA wire bundle, the spring and the rubber pad. By means of the modular design, efficient energy consumption and self-resetting can be achieved; and meanwhile, a single damper can be quickly replaced after being damaged, so that the maintenance efficiency and the system recoverability are greatly improved.

The present application provides a kind of spray gun and glue mixer, spray gun includes cylinder, upper portion of cylinder forms gas pressure chamber, lower portion forms medium chamber;Sealing bushing, sealing bushing is arranged between gas pressure chamber and medium chamber;Nozzle, nozzle is connected with cylinder, nozzle is formed with medium flow passage in, medium flow passage is connected with medium chamber, and the spray end of nozzle forms a slope, and the spray port that is connected with medium flow passage is formed on the slope, and the center line of spray port and the axis of nozzle form preset angle;Piston plug, one end of piston plug has piston main body, and the other end has plug main body that passes through sealing bushing and extends to medium flow passage in.The advantages of the present application: the way of using piston plug to push medium to spray can ensure that medium is more stable when spraying, and the pushing pressure of piston plug is greater than the pushing pressure of gas;The design of nozzle can make glue better and more evenly sprayed on material, improve sizing effect, reduce glue waste.

The invention discloses a piston type hydrogen compressor cylinder body, a cylinder body assembly and a hydrogen compressor, and relates to the technical field of hydrogen compressors, the cylinder body assembly and the hydrogen compressor both comprise the cylinder body, the cylinder body comprises a cylinder barrel, the cylinder barrel is provided with a cylinder cover and a piston rod seat, and a cylinder sleeve is lined in the cylinder barrel; the inner end of the cylinder cover extends into the cylinder sleeve and provides radial support for the cylinder sleeve, one end of the cylinder sleeve is supported on the piston rod seat, and the other end of the cylinder sleeve is provided with a sealing assembly. The sealing assembly comprises a main sealing ring and a spring which are arranged in a cavity gap between the cylinder barrel and the cylinder cover, the main sealing ring serves as an axial sealing piece in the cavity gap and is attached to the end of the cylinder sleeve, and the spring is arranged on the side, away from the cylinder sleeve, of the main sealing ring and serves as an elastic supporting structure for supporting the main sealing ring. The direction of supporting force of the spring to the main sealing ring is in the axis direction of the cylinder barrel. The structural design adopted by the scheme is beneficial to guaranteeing the reliability of the hydrogen compressor.

A valve structure A of an accumulator sprayer X provided with a cylinder body portion B having a main cylinder portion B1 and a sub-cylinder portion B2, and a cover portion C that is attached to cover the cylinder body portion B, wherein; the accumulator sprayer X sucks up liquid in a container J through a first valve FV to the main cylinder portion B1, pressurizes the liquid and spraying the liquid from a nozzle portion F when the pressure of the liquid reaches a certain pressure; and the valve structure A comprises a spring portion and a valve piston portion, wherein the valve piston portion is provided with a spring attaching portion, the spring portion is attached to the spring attaching portion, the spring portion presses the valve piston portion in vertical direction, and the spring portion has higher rigidity than the valve piston portion.

The invention relates to a piston type fluid pump which comprises a cylinder body, a piston and a power mechanism used for driving the piston to move in the cylinder body, a first Tesla valve is formed in the piston, and the first Tesla valve communicates with a compression cavity and a first fluid opening of the fluid pump. The one-way flow guide direction of the first Tesla valve is consistent with the preset medium circulation direction between the first fluid opening and the compression cavity. The Tesla valve is adopted as a one-way flow channel pipeline of the piston type fluid pump, the flow channel structure is simple, no mechanical moving part exists, the problem that the service life of the fluid pump is short due to the fact that a traditional one-way valve plate is repeatedly bent for a long time and impacts a valve plate, and the reliability of the valve plate is low is solved, and the adverse effect of reciprocating motion of the piston on the one-way valve is small. And the working reliability and the service life of the fluid pump are greatly improved.

The invention relates to a bridge abutment settlement deformation monitoring device and method, and belongs to the field of bridge monitoring, the bridge abutment settlement deformation monitoring device comprises two bearing frames arranged on one side of a bridge pier and a steel wire rope I arranged between the bearing frames and used for supporting a connecting support, and the top of the connecting support is provided with a monitoring mechanism; the monitoring mechanism comprises a plurality of piston cylinders adjustably arranged at the top of the connecting support, piston push rods are slidably arranged at the tops of the piston cylinders, extension rod pieces fixedly connected with the piston push rods are fixedly arranged on one side of the pier, and display sleeves are fixedly arranged on the two sides of the connecting support. The display sleeve is communicated with the piston cylinder body through a connecting pipeline and used for transmitting liquid prefabricated in the piston cylinder body, and a piston sliding block is arranged in the display sleeve in a sliding mode. The double steel wire ropes and the tension jack form an elastic supporting system to buffer vibration, the hydraulic linkage design converts tiny settlement into visual displacement, the spring reset mechanism is matched to improve data reliability, automatic reset is achieved, continuous monitoring is supported, and the monitoring range is expanded.

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

The invention provides a manufacturing method of a compressor slip sheet, the compressor slip sheet is provided with a sliding surface in sliding connection with a compressor cylinder body and a hinge part for hinging a compressor piston, and the compressor slip sheet is used for realizing eccentric rotation of the compressor piston and a crankshaft and realizing air compression, and the manufacturing method comprises the following steps: preparing a slip sheet body; the thickness of the slip sheet body is 2.8 mm to 4.5 mm, and the slip sheet body is provided with a first plane used for machining a sliding surface and second planes located at the two axial ends of the hinge part; the first plane is ground; feeding from the first plane of the slip sheet body, carrying out at least one time of linear cutting according to the target track of the hinged part to obtain the hinged part, and enabling the diameter range of the hinged part to be 1.5 mm to 3.5 mm; the second plane is subjected to accurate grinding treatment; and inspecting the surface of the slip sheet body, processing edges, and cleaning to obtain the compressor slip sheet. The problems that the size precision of the hinged end of the sliding vane does not meet the requirement, high-speed and smooth rotation is difficult, and noise is easily generated due to vibration are solved.

The invention provides an automatic yielding type electric support and a yielding method, and relates to the technical field of electric supports, the automatic yielding type electric support comprises a top beam, a supporting frame and a buffering device, and the top beam can ascend and descend relative to the ground; the two supporting frames are arranged side by side, each supporting frame comprises a shield beam, a connecting rod, a stand column electric cylinder and a base, the shield beams are connected with the top beam in a pivoted mode, and the ends, away from the top beam, of the shield beams are connected with the upper ends of the connecting rods in a pivoted mode; the lower end of the connecting rod and a cylinder body of the stand column electric cylinder are both connected with the base in a pivoted mode. The buffering device comprises a yielding cylinder and an overflow valve, a cylinder body of the yielding cylinder is connected with a piston rod of the stand column electric cylinder, the piston rod of the yielding cylinder is connected with the top beam in a pivoted mode, and the overflow valve is arranged at an outlet of a first cavity of the yielding cylinder. When the top plate is pressed, the top beam can automatically descend to yield pressure through the buffer device, and the problem that a support structure is damaged due to the fact that an electric cylinder does not act in time can be effectively solved.

The invention discloses an internally-inserted water-cooled magnet device for a high-field hybrid magnet. The internally-inserted water-cooled magnet device comprises a container assembly and a magnet coil assembly arranged in the container assembly. The container assembly comprises an upper barrel assembly, a container end cover, a hydraulic machine assembly, a center pipe assembly, an inner supporting assembly, a middle barrel assembly, a lower barrel assembly and an electric connecting assembly. The hydraulic machine assembly comprises a cylinder body, a piston, a check ring, a pressure equalizing pad, a first force transmission check ring, a first anti-rotation pin, a second force transmission check ring, a second anti-rotation pin, a first force transmission column and a second force transmission column. The axial force application device has the advantages that axial force application can be performed on the magnet coil assembly, the pressing force on the magnet coil assembly is improved, and the problems of tension fracture and damage caused by coil stress overrun due to overlarge radial expansion electromagnetic force of a magnet coil bit piece and an insulating piece are solved.

The invention discloses a novel internally-inserted water-cooled magnet container assembly for a hybrid magnet with high mechanical stability, which comprises an upper cylinder component, a container end cover, a hydraulic machine component, a central tube component, an inner support component, a middle cylinder component, a lower cylinder component, an electric connection component and a first conductive flexible connector, and a magnet coil assembly comprises a plurality of radially-sleeved coils; the hydraulic machine assembly comprises a cylinder body, a piston, a check ring, a pressure equalizing pad, a limiting block, a first force transmission check ring, a first anti-rotation pin, a second force transmission check ring, a second anti-rotation pin, a first force transmission column and a second force transmission column. The device has the advantages that axial force application can be performed on the magnet coil assembly, the pressing force on the magnet coil assembly is increased, the problems of tension fracture and damage caused by coil stress overrun due to overlarge radial expansion electromagnetic force of a magnet coil bit piece and an insulating piece are solved, the dismounting and maintenance process of the mixed internally-inserted water-cooled magnet device is simple and rapid, and the efficiency is high. And the dismounting efficiency is improved.

The invention discloses a high-field water-cooling magnet device which comprises a container assembly and a magnet coil assembly, and the magnet coil assembly is located in the container assembly and communicated with the container assembly. The container assembly comprises a hydraulic machine assembly, and the hydraulic machine assembly comprises a cylinder body, a piston, a check ring, a pressure equalizing pad, a first force transmission check ring, a first anti-rotation pin, a second force transmission check ring, a second anti-rotation pin, a first force transmission column and a second force transmission column. The axial force application device has the advantages that axial force application can be performed on the magnet coil assembly, the pressing force on the magnet coil assembly is improved, and the problems of tension fracture and damage caused by coil stress overrun due to overlarge radial expansion electromagnetic force of a magnet coil bit piece and an insulating piece are solved.

The invention belongs to the related technical field of plunger pumps, and discloses a leakage-free oil-water separation type plunger pump which comprises a cylinder body, a lining, a large plunger, a small plunger and an elastic sealing piece. A third groove is formed in one end of the cylinder body, a first through hole is formed in the bottom face of the third groove in a penetrating mode, and the first through hole is used for containing the large plunger; one end of the bushing is arranged in the third groove; the small plunger is step-shaped, and a first step surface is formed on the small plunger; one end of the small plunger is positioned in the bushing, and the other end of the small plunger penetrates through the elastic sealing element and then is connected to one end of the large plunger positioned in the cylinder body; the first step face and the large plunger press the middle of the elastic sealing piece to form inner-layer sealing, the lining and the bottom face of the third groove press the outer edge of the elastic sealing piece to form outer-layer sealing, and the inner-layer sealing and the outer-layer sealing are jointly used for isolating a working medium and a lubricating medium which are located on the two opposite sides of the elastic sealing piece respectively. And oil-water mutual seepage is prevented.

The utility model relates to the technical field of carbon powder production, in particular to a feeding device for feeding light powder. A feeding device for light powder comprises a feeding cylinder, a vibrator and a spiral feeding pipe and is characterized in that a vibrating spring is arranged at the upper end of the vibrator, the feeding cylinder is fixedly arranged on the upper portion of the vibrating spring, a stirring rod is arranged in the center of a cylinder body of the feeding cylinder, stirring blades are arranged at the lower end of the stirring rod, and a variable frequency motor is arranged at the upper end of the stirring rod. A discharging hopper is arranged at the lower part of the charging cylinder body; and a spiral feeding pipe is vertically arranged at the lower end of a receiving pipe connected with the discharging hopper. The feeding device for the light powder has the beneficial effects that the feeding device for the light powder facilitates feeding, powder flying and loss are reduced, the light powder which is prone to hardening and adhering to the bottom of the feeding cylinder, the side wall of the feeding cylinder and the wall of the discharging hopper can be effectively reduced, and the feeding precision and the feeding efficiency are improved; and powder can be added at a constant speed, so that overlong stirring time caused by non-uniform feeding is prevented.

A shock absorber includes a cylinder, a sleeve provided so as to surround the outer circumferential surface of the cylinder, the cylinder formed of a different material from a material for the cylinder, first and second springs provided along the outer circumferential surface of the sleeve, and a slider provided between the first spring and the second spring, and capable of being displaced in an axal direction. The materials for the cylinder and the sleeve are a combination of materials that causes corrosion due to a contact of either one of those with the other one of those. A corrosion inhibitor is provided which suppresses an occurrence of corrosion on the cylinder or on the sleeve. In one embodiment, the materials are metals.

A shock absorber (SA; SA1; SA2; SA3) equipped with vehicle height adjustment according to the present invention comprises: a shock absorber body (D) containing a cylinder (1), a piston (2) inserted into the cylinder (1) such that it is movable in an axial direction and divides the interior of the cylinder (1) into an expansion-side chamber (R1) and a compression-side chamber (R2) filled with a fluid, a piston rod (3) inserted into the expansion-side chamber (R1), movable in the axial direction relative to the cylinder (1) and connected to the piston (2), and an outer tube (5) surrounding the cylinder (1); a separating element (30;301), that the interior of the outer tube (5) is divided into a container (T) and a reservoir (R), the container (T) storing fluid, the reservoir (R) is connected to the compression-side chamber (R2) to compensate for a volume of the piston rod (3) entering and exiting the interior of the cylinder (1); a pump (31) provided at the separating element (30; 301) which supplies and discharges the fluid through the reservoir (R) into the interior of the cylinder (1); and a damping force adjusting valve (18) provided at the separating element (30; 301) configured to adjust a damping force during expansion and compression of the shock absorber body (D).

The invention discloses a volume type hydrogen compressor cylinder body structure and a hydrogen compressor system, and belongs to the technical field of compressors, the compressor system comprises the cylinder body structure, the cylinder body structure comprises a cylinder body, piston assemblies and a piston rod, and the piston assemblies comprise the first piston assembly and the second piston assembly; each of the first piston assembly and the second piston assembly comprises a piston ring and a guide ring; an air guide hole is formed in the piston rod, an annular groove is formed between the first piston assembly and the second piston assembly, and one end of the air guide hole communicates with the annular groove; the pressure sampling device further comprises a pressure sampling cylinder, a cavity is formed in the pressure sampling cylinder, and when the piston assembly is in the gas compression stroke, the other end of the gas guide hole is communicated with the cavity. And the pressure sensor is used for measuring the pressure in the cavity. According to the structural design provided by the scheme, online monitoring of the sealing condition of the piston assembly and the air cylinder wall can be achieved, and compared with technologies based on vibration monitoring, sound wave monitoring and the like, adverse effects of the data extraction and analysis process on the monitoring result can be avoided.

The invention relates to the technical field of external thread machining, in particular to a steel pipe external thread machining device and a machining method thereof.The steel pipe external thread machining device comprises a conveying support, a conveying mechanism and a machining mechanism, a through groove is formed in the middle of the top end of the conveying support in a penetrating mode, and the conveying mechanism is arranged on the conveying support and used for conveying and supporting a steel pipe; the machining mechanism comprises a clamping moving assembly, a grinding assembly and two fixed supports. The overturning driving cylinder body can be used for driving the driving connecting rod to adjust the height of the overturning support, supporting requirements of steel pipes of different specifications can be flexibly met, the problem that a traditional device is narrow in adaptation range is solved, automatic conveying of the steel pipes can be achieved, manual intervention is reduced, follow-up machining continuity is guaranteed, and therefore the steel pipe machining efficiency is improved, and the production cost is reduced. And automatic machining of the steel pipe can be achieved, noise and vibration in the steel pipe machining process are reduced, thread precision deviation caused by vibration is avoided, and therefore the machining quality is improved.

The anti-deflection air cylinder comprises a cylinder body, a piston, a piston rod and a sleeve seat, the cylinder body is provided with a containing cavity with an opening in one end, the piston is arranged in the containing cavity, one end of the piston rod is fixedly connected with the piston, the piston rod extends out of the cylinder body from the opening of the containing cavity, and a limiting groove extending in the axial direction of the piston rod is formed in the outer wall of the piston rod; a sealing ring is fixed in the open end of the cylinder body, the piston rod extends out of a ring opening of the sealing ring, a sealing block matched with the limiting groove is arranged on the inner wall of the ring opening of the sealing ring and clamped into the limiting groove, and the sleeve seat is fixed to the outer wall of the open end of the cylinder body and provided with a sleeve hole matched with the diameter of the piston rod. The piston rod penetrates out of the sleeve seat from the sleeve hole, the outer wall of the piston rod is attached to the inner wall of the sleeve hole, a hard clamping block matched with the limiting groove is fixed to the position, in the sleeve hole, of the sleeve seat, the hard clamping block is clamped into the limiting groove, the piston rod can stably move and accurately linearly move, and installation in a narrow space is facilitated.

Provided is an apparatus for piston insertion, including an insertion robot having a plurality of robot arms connected by a plurality of articulated joints, a piston insertion module directly mounted on the insertion robot, gripping a piston assembly, and inserting the piston assembly into a cylinder bore of a cylinder block, and a controller controlling an operation of the insertion robot and an operation of the piston insertion module.

The utility model discloses a variable damping double-valve shock absorber, which relates to the technical field of shock absorbers, and comprises a cylinder body, a guider arranged at one end of the cylinder body, a connecting block arranged at the other end of the cylinder body, and a piston assembly arranged in the cylinder body, the cylinder body comprises an inner cylinder, a middle cylinder and an outer cylinder which are sequentially arranged from inside to outside, a gap between the inner cylinder and the middle cylinder forms a transition cavity, a gap between the middle cylinder and the outer cylinder forms an oil storage chamber, and the transition cavity is communicated with the recovery chamber through an inner hole; the transition cavity is in one-way communication with the compression chamber through a recovery channel located on the connecting block, and a one-way valve and a recovery electromagnetic valve are arranged on the recovery channel. The compression chamber is in one-way communication with the transition cavity through a compression channel located on the connecting block, and a one-way valve and a compression electromagnetic valve are arranged on the compression channel. Due to the arrangement of the middle cylinder, connection of the double-valve restoring and compressing oil way and the electromagnetic valve is achieved, and the double-valve restoring and compressing device has the advantages of being lower in cost and simpler in structure.

The invention relates to the technical field of motor assembly, and provides a motor assembly system with a motor shell and cylinder body integrally formed structure, the motor assembly system comprises a turntable mechanism, a conveying mechanism, an assembly mechanism and a mechanical arm, the turntable mechanism is used for temporarily storing a rotor, the conveying mechanism comprises a sliding rail, and a tray is horizontally and slidably connected to the sliding rail; the assembling mechanism comprises an assembling table and a downward pressing assembly which cooperates with the positioning disc and is used for fixing the cylinder body, and an assembling frame is horizontally, linearly and movably connected to the assembling table. The assembly frame is rotationally connected with an installation disc used for positioning, placing and fixing the rotor, the installation disc is provided with a guide sleeve used for installing the rotor in the cylinder body in a guiding and aligning mode, and the mechanical arm is used for transferring the rotor on the rotary disc mechanism to the installation disc. Closed-loop operation of assembly of the cylinder body and the rotor is achieved, the assembly precision and efficiency are improved, and the consistency of product quality is guaranteed.

The utility model discloses a pressure boosting device suitable for a hydraulic fracturing crustal stress test, which is sequentially connected with an upper rubber plug and a lower rubber plug of a crustal stress test device through a push-pull pressure relief conversion device, and comprises a pressure boosting cylinder body, a first pressure relief device, a second pressure relief device and a pressure relief device, the second inner cavity is sequentially connected with the upper rubber plug and the lower rubber plug through a push-pull pressure relief conversion device, an exhaust hole communicated with the first inner cavity is formed in the side wall of the pressure boosting cylinder body, and a water inlet and outlet hole communicated with the second inner cavity is further formed in the side wall of the pressure boosting cylinder body. The low-pressure piston is movably arranged in the first inner cavity, the high-pressure piston is movably arranged in the second inner cavity, and the force transmission column is connected with the low-pressure piston and the high-pressure piston. According to the utility model, the limited pressure in the coring drill rod can be increased to the test pressure required by the crustal stress test, so that the equipment loss risk during the crustal stress test is greatly reduced.

The anti-collision adjustable buffering oil cylinder comprises a cylinder body, a piston rod is slidably connected into the cylinder body, a mounting base is fixedly mounted at the end of the cylinder body, a sealing sleeve is fixedly mounted on the side, away from the mounting base, of the cylinder body, and the end of the piston rod penetrates through the sealing sleeve; according to the technical scheme, through the inner buffering mechanisms at the two ends in the cylinder body, a buffering bearing ring, an inner buffering spring and an inner damper are used for cooperative buffering, rigid impact of the piston plate is avoided, the structure is protected, and the service life of the piston plate is prolonged. The problems of part damage, shortened service life and faults caused by too large pressure difference are solved, meanwhile, the outer buffering mechanism outside the cylinder body counteracts impact energy and blocks impurities through an outer anti-collision plate, an outer buffering spring and an outer damper, the position can be flexibly adjusted, the impact resistance and protection effect can be improved, and the problem that external protection is lacked is solved.

The invention discloses a runner rotary vane mechanism for a fluid machine and an engine. The runner rotary vane mechanism comprises a differential control device, a runner, a left impeller set and a right impeller set. A plurality of inner transmission shafts and an outer transmission shaft of the differential control device are concentrically arranged in a sleeved mode. The rotating wheel is installed in a cylinder body of the stator, and a left separation blade and a right separation blade are arranged on the two sides of a wheel disc of the rotating wheel respectively. The cylinder body is divided into a left cylinder and a right cylinder by the rotating wheel, and a plurality of left blades of the left impeller group are arranged in the left cylinder; and a plurality of right blades of the right impeller group are arranged in the right air cylinder. And the rotating wheel rotates under the control of the differential control device so as to carry out two-stage fluid conveying work.

The invention relates to the technical field of shock absorption, and discloses a frequency self-adaptive shock absorber which comprises a cylinder body, a piston assembly and a frequency response structure. The piston assembly comprises a piston body and a piston rod. The frequency response structure is integrated in the piston rod and comprises a communicating channel, a mounting hole, an adjusting rod, an elastic piece and a plunger sleeve, the plunger sleeve is arranged in the communicating channel, a conical convex part is arranged at one end of the adjusting rod, an overflowing gap is formed between the peripheral face of the conical convex part and a port of the plunger sleeve, and the elastic piece is connected with the end, deviating from the plunger sleeve, of the adjusting rod. The frequency response structure is integrated in the piston rod, the elastic piece made of the nonlinear elastic material is used for sensing the oil pressure frequency change, the adjusting rod is driven to move in combination with the oil pressure, the damping force can be reduced at high frequency and increased at low frequency, and self-adaptive adjustment of the damping force of the shock absorber under high and low frequency vibration road conditions is achieved. According to the design, a complex frequency control valve does not need to be additionally arranged, and the cost, the structural complexity and the overall size of the damper can be remarkably reduced.

A shock absorber according to the present invention includes: a cylinder; a rod movably inserted into the cylinder; an extension side chamber (operation chamber) and a compression side chamber (operation chamber) provided in the cylinder; a valve disc that is provided to be movable in the axial direction on the outer circumference of the rod and has an annular valve seat and a port which is opened on the inner circumference of the annular valve seat and causes the extension side chamber (operation chamber) and the compression side chamber (operation chamber) to communicate with each other; and an annular leaf valve that opens and closes the port.

The invention relates to the technical field of engine cylinder body and cylinder cover surface defect detection, and discloses a visual detection method for engine cylinder body and cylinder cover surface defects, which comprises the following steps of: acquiring engine cylinder body and cylinder cover surface images under various different imaging conditions, preprocessing, extracting a feature vector of each pixel block, distributing weights by using a weight function, and calculating the surface defects of the engine cylinder body and cylinder cover. The method comprises the following steps: extracting a suspected defect area, introducing a loss function for verification, constructing a causal graph, calculating the probability of each defect type through causal inference, providing a decision basis for final output decision, and finally outputting a defect result. By integrating multi-angle illumination, multi-spectral imaging and laser scanning systems, rich information of the surface under different physical characteristics can be obtained, and it is ensured that various types of defects can present high contrast characteristics under at least one imaging mode.