9340 results about "Cylinder block" patented technology

The present invention provides a water circulation structure for a motorcycle engine, belonging to the technical field of motorcycles. It solves the technical problems of insufficient compactness of the existing engine water circulation structure and affecting the circulation effect. The water circulation structure of this motorcycle engine includes a reversing housing located on one side of the cylinder block. The reversing housing has a liquid inlet chamber and a liquid outlet chamber separated by a thin wall. The thin wall has a liquid passing port communicating the liquid inlet chamber and the liquid outlet chamber. Both ends of the water circuit are respectively communicated with the liquid inlet chamber and the liquid outlet chamber. The inner wall of the liquid inlet chamber has a liquid inlet for communicating with the cooling water tank, and the inner wall of the liquid outlet chamber has a liquid outlet for communicating with the cooling water tank. The thermostat is located in the liquid outlet chamber, and one end of the thermostat closes the liquid outlet. The other end of the thermostat is arranged towards the liquid passing port. After being heated, the thermostat can close the liquid passing port and open the liquid outlet. The present invention can ensure a sufficient circulating cooling effect while improving the structural compactness.

The invention provides a low-speed and ultrahigh-pressure die-casting process method for automobile part die-casting, and relates to the field of automobile part manufacturing. The method includes the following steps that firstly, a mold is prepared, secondly, molten metal is prepared, thirdly, a casting is cooled and demolded, and fifthly, follow-up treatment is conducted. The defects that in the high-speed mold filling process of a common high-pressure casting technology, gas is likely to be involved in the molten metal, and consequently air holes, shrinkage porosity and the like are generated in the casting are overcome; and when key parts such as automobile engine cylinder bodies and hubs are produced, air hole defects possibly cause the problems of air leakage of engines, insufficient hub strength and the like. And meanwhile, for parts with thin walls and complex structures, uniform filling of molten metal in a mold is difficult to ensure by a traditional die-casting process, the defects of cold shut, insufficient pouring and the like are easy to occur, and the qualified rate and the production efficiency of products are reduced.

The present invention relates to the field of construction machinery, and in particular to a tensioning force control device for prestressed sleepers. The present invention solves the problems of a large prestress deviation and low tensioning positioning efficiency during tensioning of prestressed steel wires. The device comprises a tensioning module, a tensioning rod and a locking module. The tensioning module comprises a tensioning jack and a tensioning rod connector. The tensioning jack comprises a plurality of cylinder bodies provided with piston rods. Oil injection cavities of the plurality of cylinder bodies are communicated and oil return cavities thereof are also communicated. The piston rods are connected to the tensioning rod connector. The tensioning rod connector is temporarily connected to the tensioning rod when in use. The outer wall of the tensioning rod is provided with a nut gear in threaded fit with the tensioning rod. The tensioning rod is provided with a tensioning stepped hole. The locking module comprises a locking motor and a locking gear that is engaged with the nut gear when in use. The locking motor is connected to the locking gear. Each piston rod is used for tensioning one prestressed steel wire, and synchronized oil intake and return for the plurality of piston rods are achieved, alleviating the overlarge prestress deviation between the prestressed steel wires. The locking module allows for time-saving and labor-saving tensioning positioning.

The invention relates to a fan module of a turbine engine with a variable pitch mechanism, the turbine engine and a pitch adjusting method. The fan module comprises fan blades and a propeller pitch adjusting rocker arm. The fan blades are installed on the fan installation hub through a bearing, and the fan blades are connected with the propeller pitch adjusting rocker arm at the same time; the hydraulic actuating device comprises a piston and an actuating cylinder body, the piston can reciprocate in the actuating cylinder body, and the propeller pitch adjusting rocker arm is matched with the piston of the hydraulic actuating device; the fan installation hub is fixedly connected with the fan input shaft, and the actuator cylinder body is fixed to the fan input shaft; the safety locking mechanism is matched with the piston; the fan module has a first state, a second state and a third state.

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 invention discloses an anti-liquid-impact compressor cylinder structure, a compressor and a wellhead natural gas compression method, and relates to the technical field of compressors, the cylinder structure comprises a cylinder barrel and a piston ring assembly, a piston cavity is formed in the cylinder barrel, the cylinder structure further comprises a partition plate, the partition plate divides the piston cavity into a working cavity and a buffering cavity, and the piston ring assembly is arranged in the working cavity; the communication channel is used for realizing mutual communication of the working cavity and the buffer cavity on the two sides of the partition plate; the partition plate is configured in the mode that when the pressure difference between the pressure of the working cavity and the pressure of the buffer cavity exceeds a set threshold value, the fixed relation of the partition plate in the piston cavity is damaged under the pressure difference between the two sides of the partition plate, the partition plate can move towards the side where the buffer cavity is located under the pressure difference, the compressor comprises the cylinder body structure, and the compression method is achieved based on the cylinder body structure. According to the scheme, the maximum pressure in the cylinder is reduced by adopting a method of expanding the clearance volume of the cylinder body when the liquid impact phenomenon occurs, and the response speed in the clearance volume expanding process can be effectively optimized.

The present invention discloses an electronically controlled evaporator and its control method. The electronically controlled evaporator includes: a medicine storage module, a plunger pump system, and a valve seat module; the medicine storage module includes a medicine tank, a medicine lid, and a bent plate; the plunger pump system is composed of a cylinder block, a piston rod, a floating joint, a lead screw, a pump motor, a pipe joint, etc., to realize the suction and pushing of anesthetic liquid; the valve seat module includes a valve seat, an air outlet, a diffusion joint, an air inlet, a lower valve plate of the evaporation core, an upper valve plate of the evaporation core, an evaporation core motor, an evaporation core spring, a ferrule, a switching valve motor, an upper valve plate of the switching valve, a lower valve plate of the switching valve, etc., to realize the on / off of the anesthetic liquid and the volatilization of the anesthetic. The anesthetic output by the plunger pump of the present invention can quickly volatilize and mix with fresh gas when entering the evaporation core, thereby realizing precise control of the anesthetic concentration. At the same time, when it is necessary to close the anesthetic output, the anesthetic liquid outlet can be quickly closed.

The utility model relates to the technical field of asphalt stirring processing, in particular to an asphalt mixture heating regeneration stirring cylinder and stirring equipment. The stirring device comprises a cylinder body, wherein a stirring cavity is formed in the cylinder body; the stirring assembly is arranged in the stirring cavity, the stirring assembly comprises a stirring shaft, the stirring shaft penetrates through the cylinder body and the stirring cavity, a plurality of stirring arms are evenly distributed on the part, located in the stirring cavity, of the stirring shaft, and stirring blades are arranged on the stirring arms; the cover plate is arranged on the stirring cavity, and a microwave heating magnetron is arranged on the cover plate. The microwave heating magnetron is arranged on the cover plate at the top of the stirring cylinder, and microwave energy is converted into heat energy, so that an asphalt mixture in the stirring cylinder is uniformly heated, the flowability of the asphalt mixture is improved, the bonding phenomenon of the inner wall of the stirring cylinder and the stirring shaft is reduced, and the uniform stirring condition of the asphalt mixture is greatly improved; the stirring quality and the production efficiency of the stirring shaft equipment are improved.

The invention discloses a wellhead natural gas compressor cylinder body structure, a compressor and a working method of the compressor, and relates to the technical field of compressors, the cylinder body structure comprises a cylinder barrel, the cylinder barrel comprises an outer cylinder barrel and an inner cylinder barrel, the inner cylinder barrel is embedded in a center hole of the outer cylinder barrel, and a piston cavity of the cylinder barrel is formed by a center hole of the inner cylinder barrel; the inner wall of the outer cylinder barrel and the outer wall of the inner cylinder barrel are each provided with a spiral groove with a semi-annular cross section, the spiral grooves of the outer cylinder barrel and the outer wall of the inner cylinder barrel define a spiral flow channel which extends in the axis direction of the cylinder barrel, the cross section of the spiral flow channel is annular, and the spiral flow channel is provided with a medium leading-in hole and a medium leading-out hole which are located in the surface of the outer cylinder barrel. The compressor comprises the cylinder body structure, and the working method is the working method of the compressor. According to the scheme, the temperature difference of different positions of the inner wall of the cylinder can be effectively reduced, the purposes of reducing air leakage of a piston ring and optimizing the volume of the compressor are achieved, and the purposes of reducing deformation of different positions of the inner wall of the cylinder and optimizing vibration in the working process of the compressor are achieved.

The invention discloses a coal mine tunnel grouting reinforcement device, and relates to the technical field of tunnel grouting reinforcement, the coal mine tunnel grouting reinforcement device comprises grouting equipment, and the upper and lower sides of the grouting equipment are symmetrically fixed with pushing cylinder bodies; the adjusting cylinder bodies are symmetrically hinged to the upper side and the lower side of the grouting equipment; the number of the connecting plates is two, one ends of the connecting plates are hinged to the two pushing cylinder bodies correspondingly, and the other ends of the connecting plates are hinged to the adjusting cylinder bodies correspondingly; the telescopic equipment is fixed to the side, close to the connecting plate, of the grouting equipment; the supporting assembly is fixed to the output end of the telescopic equipment; and the grouting assembly is arranged in the supporting assembly in a sliding mode, penetrates through the telescopic equipment and drives stretching and grouting operation through the grouting equipment, the situation that primary grouting is extruded unevenly during secondary grouting can be avoided, gas in grout can be discharged easily, and the situation that the reinforcing effect is affected due to the fact that holes appear is avoided.

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 relates to the field of grinding machinery, and discloses a cylinder body casting grinding device and a grinding process thereof.The device comprises a frame body and a controller, a three-jaw chuck is arranged on the frame body, and a to-be-ground cylinder body is clamped through the three-jaw chuck; a grinding mechanism is further arranged on one side of the frame body and comprises a hydraulic telescopic cylinder and a driving part, the hydraulic telescopic cylinder is fixedly installed on the frame body, the driving part is fixedly installed at the end of the hydraulic telescopic cylinder, and the output end of the driving part is in transmission connection with a grinding shaft; a grinding shell is fixedly arranged at the end of the grinding shaft, multiple stages of grinding wheels are arranged in the grinding shell, an alternating assembly is further arranged in the grinding shell, and the alternating assembly is used for pushing the different stages of grinding wheels to sequentially stretch out of the grinding shell to conduct the grinding action of the cylinder body. By means of the mechanism, real-time replacement of different levels of grinding wheels in the working state in the cylinder body is achieved, and the grinding efficiency is higher.

The invention provides a control method and system for high-temperature protection of a hydraulic cylinder, and relates to the field of hydraulic cylinders, and the control method specifically comprises the steps that data are collected through temperature sensors arranged in a cylinder body, a piston rod, oil and the environment, and a three-dimensional temperature field model is constructed based on the Fourier heat conduction law; an oil temperature threshold value is set, a graded cooling mechanism is started when the threshold value is exceeded, and cooling heat is calculated according to a Newton cooling formula and a logarithmic average temperature difference method. Fuzzy PI D control is combined with a neural network prediction model, the cooling intensity is dynamically adjusted according to the temperature rising rate and the load state, and the high-temperature risk is pre-judged. The failure of the sensor is processed by a Kalman filtering algorithm, and the cooling system is automatically switched to a standby loop and alarms if the cooling system fails. The system comprises a temperature acquisition module, a control module, a cooling execution module, an alarm module and a remote communication module, and can solve the problems that an existing protection method is poor in passive cooling effect and unreasonable in timing cooling.

The invention belongs to the technical field of oil and gas exploitation and pressurized transportation, and discloses a lead screw driven rodless reciprocating type single-action electric submersible pump and a control method. The electric pump is characterized in that a working cavity is formed between a plunger and an upper working cavity end cover, and a lower cavity is formed between the plunger and a lower cavity end cover; the plunger does reciprocating motion in the working cavity to finish suction and discharge of liquid; the lower working cavity end cover is installed at the bottom of the cylinder body, and a lead screw is fixed to the lower working cavity end cover and connected with the plunger. The lead screw is connected with a motor. The plunger is driven by the lead screw to reciprocate in the cylinder body, and suction and discharge of liquid and control and continuous conveying of liquid in a working cavity are sequentially completed in the up-down stroke of the plunger by means of one-way opening and closing of the liquid inlet valve and the liquid discharge valve. The lead screw driving rodless reciprocating type single-action electric submersible pump is higher in efficiency under the complex well condition. The optimized reciprocating type driving mechanism can achieve efficient one-way conveying, the sealing design can prolong the service life of equipment, and the maintenance cost is reduced.

The invention discloses a drilling pump fluid end anomaly detection method based on a valve impact phase index. The method comprises the steps that firstly, a signal decomposition method is adopted to extract valve impact components in vibration signals; then, extracting an impact peak value in each period, and taking the impact peak value as a valve impact phase of the corresponding period; the relative phase is calculated according to the phase data between the adjacent cylinder bodies; further calculating a variance index and a mean value index of the relative phase to represent a phase distribution characteristic; and finally, an anomaly correlation matrix is constructed based on the indexes, and anomaly detection and fault cylinder positioning identification are realized in combination with a preset judgment rule.

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

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

The invention discloses a double-acting integrated hydraulic nut and a hydraulic nut system. The double-acting integrated hydraulic nut comprises a cylinder body, a piston, a cylinder cover, a locking nut, an outer hexagon head bolt and a locking sleeve. A mounting plane attached to a workpiece is arranged at the bottom of the cylinder body, and the piston is arranged in an inner cavity of the cylinder body in an axial sliding mode. The outer hexagonal head bolt sequentially penetrates through the axial through hole of the piston and the bottom of the cylinder body, and the threaded end of the outer hexagonal head bolt is meshed with a workpiece in a threaded mode. The cylinder cover is arranged at the top of the cylinder body; the locking nut is in threaded connection with the piston rod and is in contact with the top surface of the cylinder cover; a pressurizing oil port connected with a hydraulic pump station is formed in the side wall of the cylinder body. The hexagonal head of the outer hexagonal head bolt is sleeved with the locking sleeve which is in driving connection with the electric wrench. Due to the fact that the bearing seat bolts are compact in layout and large in bolt pre-tightening force requirement, the experiment platform can be rapidly mounted and dismounted, and working time and cost are greatly reduced.

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

The utility model provides an electromagnetic electro-hydraulic composite vibration device which comprises a cylinder body, a magnetic cylinder ring arranged on the side edge of the cylinder body in the axial direction and a piston penetrating through the cylinder body in the axial direction, an excitation piece is arranged in the magnetic cylinder ring, a driving coil is arranged on the piston, and the excitation piece is connected with the driving coil. The middle of the piston protrudes outwards in the axial direction to form a stress protrusion, the stress protrusion abuts against the cylinder body in the radial direction, the driving coil is used for being matched with an excitation piece to drive the piston to move in the axial direction, and the cylinder body is hollow to form an upper hydraulic cavity and a lower hydraulic cavity which are located on the two sides of the stress protrusion. The cylinder body is provided with a first hydraulic runner and a second hydraulic runner which are used for being communicated with the upper hydraulic cavity and the lower hydraulic cavity respectively. According to the electromagnetic electro-hydraulic composite vibration device and the vibration table, electromagnetic vibration and electro-hydraulic vibration can be achieved on one vibration table, the bandwidth coverage is wide, and compared with two sets of equipment which operate independently, the cost is lower, and the occupied area is smaller.

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.

The present invention discloses a hydraulic breaker body, specifically related to the field of hydraulic breakers, which includes an upper cylinder body assembly and a through-bolt assembly. The bottom end of the upper cylinder body assembly is provided with a middle cylinder body assembly, and the end of the middle cylinder body assembly away from the upper cylinder body assembly is provided with a lower cylinder body assembly. The upper cylinder body assembly, the middle cylinder body assembly, and the lower cylinder body assembly are detachably connected through the through-bolt assembly. A piston rod is movably installed inside the middle cylinder body assembly. A nitrogen chamber is provided at the bottom end of the upper cylinder body assembly, and the top end of the piston rod is movably sealed at one end of the nitrogen chamber. An oil passage is opened on one side of the middle cylinder body assembly. Through two design methods, the present invention realizes the adjustment of the impact frequency of the steel drill rod of the hydraulic breaker based on the hardness of the object to be acted on, making the hydraulic breaker have ultra-high crushing performance, ultra-low failure rate, ultra-high stability, ultra-high durability, and is more labor-saving, environmentally friendly, resource-saving, and can improve the service life of the product.

The invention discloses an active lubrication brake cylinder for a railway wagon and the railway wagon, and relates to the field of railway wagon control systems.The active lubrication brake cylinder comprises a fixed gear ring arranged at the bottom of a spinning cylinder body, and a piston is arranged in the spinning cylinder body; the matching gear ring and the fixed gear ring are arranged in parallel, and the side, facing the fixed gear ring, of the matching gear ring is a convex tooth surface; the projection of the S-shaped spiral elastic pieces in the axial direction of the piston is in a circular arc shape, one ends of the S-shaped spiral elastic pieces are connected with the side, away from the fixed gear ring, of the matched gear ring, the S-shaped spiral elastic pieces are symmetrically arranged in the circumferential direction of the matched gear ring, and the other ends of the S-shaped spiral elastic pieces are connected with a base of the piston; the brake cylinder structure meets the modification of the existing brake cylinder, is simple in structure and low in modification cost, and also has good manufacturability and maintainability.

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 utility model discloses a brake pump used on a mobile mechanical brake system, belongs to the technical field of mobile machinery, and solves the problems that an existing brake pump is strenuous in brake operation and poor in brake effect. The brake pump comprises a pump body, a boosting assembly, a connecting assembly, a brake assembly and a booster cylinder body, and is characterized in that the boosting assembly used for boosting and pushing the brake assembly is arranged at the front end of the pump body, one end of the boosting assembly is connected with a pedal, a boosting cavity is formed between the boosting assembly and the pump body, the connecting assembly is arranged in the pump body, and the booster cylinder body is arranged in the boosting cavity. The pressurizing cylinder body is arranged at the rear end of the pump body, the braking assembly is arranged between the pump body and the pressurizing cylinder body, and the left end and the right end of the connecting assembly are connected with the boosting assembly and the braking assembly respectively. According to the brake pump used on the mobile mechanical brake system, a pressurization mode is adopted, so that the brake pump has the advantages that the brake pedal is labor-saving to operate, the brake displacement is large, and the brake pressure is high.

An internal combustion engine has a cylinder block that defines a blind cylinder bore that terminates within the cylinder block. A piston is positioned within the blind cylinder bore. The piston is connected to two crankshafts. A combustion chamber is formed between the piston and the blind end of the cylinder bore. Various mechanisms can provide actuation, timing control, and during control of valves that control flow into and out of the combustion chamber.