733 results about "Piston ring" patented technology

The invention discloses an intelligent control valve with a self-adaptive sealing structure, and relates to the technical field of valves, the intelligent control valve comprises a valve main body, a self-adaptive sealing mechanism is arranged in the valve main body, a control box matched with the self-adaptive sealing mechanism is arranged on the valve main body, and the valve main body comprises a valve body, a valve rod and a gate plate; a valve seat groove in sliding fit with the gate plate is formed in the valve body, the self-adaptive sealing mechanisms comprise sealing bottom rings, sealing side rings, piston rings and sealing gaskets and are installed on the left side and the right side of the valve seat groove, and the control box comprises a box body, a controller, a pressure regulating pipe and a motor and is installed at the lower end of the valve body. The valve has the advantages of automatically compensating sealing abrasion, monitoring the sealing state in real time and intelligently regulating and controlling, and the problems that a traditional valve is poor in sealing performance, high in maintenance cost and lack of real-time monitoring are solved.

The invention provides an intelligent cleaning control method and system for an engine piston ring, and the method comprises the steps: building a dynamic cleaning path through obtaining the residue phase change gradient, the laser beam incident angle, the roughness and the oxide layer thickness data of a laser thermodynamic action region on the surface of the piston ring; in the cleaning process, based on oxide layer thickness distribution, a deep learning model is used for generating target scanning frequency offset in real time, and laser power density and focusing depth parameters are further optimized. And by dynamically adjusting laser energy distribution, precise removal of residues is achieved, and meanwhile a piston ring base material is protected. The cleaning precision of the engine piston ring is improved.

The invention belongs to the technical field of tensile experiment devices, and particularly relates to a metal rod tensile experiment device which comprises a rack, a supporting table and a tensile assembly, the supporting table and the tensile assembly are installed on the rack, and a fixing assembly is arranged on the surface of the supporting table. By arranging the stretching assembly, when the sliding block ascends, a nylon rope can pull a piston ring to extrude air in a second empty bin to enter a first empty bin through a groove, so that a supporting rod is pushed to slide upwards, and an upward thrust is applied to the sliding block; according to the high-precision lead screw, the situation that the precision of the high-precision lead screw is reduced due to the fact that a threaded groove of the high-precision lead screw is damaged by downward force applied to the surface of the sliding block through a cross beam by a metal rod can be effectively prevented; and the connecting plate is lifted upwards, the connecting rod is pushed to be jacked upwards, and limiting on the groove is relieved, so that the high-precision lead screw is prevented from continuously driving the sliding block to slide downwards.

The invention discloses a novel plug-in type glass fiber reinforced plastic air duct, and relates to the technical field of glass fiber reinforced plastic air ducts. The novel plug-in type glass fiber reinforced plastic air duct comprises a duct body, a plug-in section is arranged at the left end of the duct body in a sealing and sliding mode through a piston ring, a clamping ring is fixed to the left end of the plug-in section, and a check ring is fixed to the inner wall of the duct body; the sealing adjusting assembly is mounted on the inner wall of the socket section through two sliding grooves; and the auxiliary dismounting assembly is arranged between the mounting frame and the sealing adjusting assembly. The sealing ring tightly attached to the outer wall of the inserting section is arranged on the inner wall of the socket section, so that the sealing performance of the inserting structure is improved; the sealing adjusting assembly is arranged, the sealing ring is opened in the inserting process of the inserting section, and the friction resistance during inserting is reduced; by arranging the inserting section capable of being adjusted in a sliding mode and the auxiliary disassembling assembly, the inserting section can be slidably contained in the barrel body during disassembling, the two ends of the middle-section glass fiber reinforced plastic air barrel and the other glass fiber reinforced plastic air barrel are not partially overlapped, and therefore the middle-section glass fiber reinforced plastic air barrel can be rapidly separated from the air barrels at the two ends, and the maintenance and replacement efficiency is improved.

The utility model discloses an inner cooling oil chamber, oil cooling piston and engine, including: inner cooling oil chamber body, including oil chamber body lower part and oil chamber body upper part, oil chamber body upper part at least includes first vortex area and second vortex area, first vortex area is closer to piston center than second vortex area, and the first vortex area is closer to piston center than second vortex area. The second vortex region is closer to the piston ring groove than the first vortex region. Engine oil is sprayed into the oil inlet channel through an engine oil pump and enters the inner cooling oil cavity body through the oil inlet channel. Along with rapid and high-frequency up-and-down movement of the piston, engine oil continuously collides with the upper wall face and the lower wall face of the inner cooling oil cavity body under the action of inertia force, part of the engine oil impacts the first vortex area to form a first vortex, and part of the engine oil impacts the second vortex area to form a second vortex. The contact area of engine oil and the inner cooling oil cavity body is increased, the flowing speed of the engine oil in the vortex area is higher, a better cooling effect is generated, the temperature of a piston can be more effectively reduced, and the phenomenon that the engine oil in the inner cooling oil cavity is coked is reduced.

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 a test system for monitoring the temperature of a piston ring of a marine engine, which belongs to the technical field of marine engine temperature monitoring and comprises an infrared temperature measurement module arranged in a cylinder sleeve test hole, a data acquisition unit electrically connected with the infrared temperature measurement module and a data processing unit electrically connected with the data acquisition unit. The number of the cylinder sleeve test holes is multiple, the infrared temperature measurement module is used for measuring the temperature of different positions of the piston ring, measured temperature data are collected through the data collection unit and subjected to primary processing, and the data processing unit receives the data transmitted by the data collection unit and then conducts deep analysis and processing so as to obtain the temperature distribution condition of the piston ring. Real-time and accurate monitoring of the temperature of the piston ring in the operation process of the engine is facilitated, the limitation of a traditional contact type measuring method is overcome, and the damage risk of the piston ring and a cylinder sleeve is reduced.

The piston sealing assembly for the reciprocating type oil-free labyrinth seal compressor comprises an air cylinder, a piston is arranged in the air cylinder, a rotating groove is formed in the outer side wall of the piston, a rotating mechanism is arranged in the rotating groove, and a piston is arranged in the rotating mechanism. And the rotating mechanism comprises a rotating cylinder, two push rods, two extension springs, two extrusion inclined blocks, two pushing springs, two stop blocks and two limiting inclined blocks, a plurality of fixing grooves are formed in the outer side wall of the rotating cylinder and the outer side wall of the piston, and a plurality of piston rings and supporting rings are fixed into the fixing grooves correspondingly. According to the piston sealing assembly for the reciprocating type oil-free labyrinth seal compressor, the multiple piston rings and the multiple supporting rings are arranged, cavity labyrinth seal is formed between the multiple piston rings and between the multiple supporting rings, in this way, non-contact seal is formed, mutual abrasion and cylinder rubbing are avoided, and the piston sealing assembly can adapt to long-period operation of the compressor; and faults which cannot be repaired in a long period are eliminated.

A sliding arrangement for use in an internal combustion engine is described, comprising a cylinder liner (1) and at least one piston ring (10), wherein the liner (1) has a through-bore defining an inner surface (S) which in turn defines three sections: a first section (2) near the end of the piston stroke, facing the cylinder head (at top dead center, TDC); a second, middle section (3); and a third section (4) near the end of the piston stroke, facing the crankshaft of the engine (at top dead center, TDC), wherein (i) the TDC section (2) of the liner (1) has a surface finish with a first roughness value defined by a structure of recesses and projections (“valleys” and “raised areas”); the middle section (3) of the liner (1) has a surface finish with a second roughness value defined by a structure of recesses and projections (“valleys” and “raised areas”);(1) the BDC section (4) of the cylinder liner (1) has a surface finish with a third roughness value defined by a structure of recesses and projections (“valleys” and “raised areas”), and the roughness value of the middle section (3) is significantly lower than the roughness value of the TDC section (2), and is defined by an essentially very smooth structure of recesses and projections (“valleys” and “raised areas”); and (ii) a ceramic coating (R) is applied to at least part of the contact surface of the piston ring (10) by the physical vapor deposition (PVD) process.

The invention relates to a pinhole cable glue pouring device and method of a motor train unit brake control system, and belongs to the technical field of cable connection.The pinhole cable glue pouring device of the motor train unit brake control system comprises a machine body, a glue pouring device, a glue pouring tool and a defoaming mechanism, the glue pouring device is arranged on the machine body, and the defoaming mechanism is arranged on the machine body; the glue pouring device is used for providing pouring glue, the glue pouring tool is used for fixing a cable and a connector, a glue pouring cavity is formed in the glue pouring tool, when the cable and the connector are fixed to the glue pouring tool, the connecting position of the cable and the connector is located in the glue pouring cavity, the defoaming mechanism is arranged on the glue pouring tool, and the defoaming mechanism is arranged on the glue pouring tool. The defoaming mechanism comprises a defoaming ring detachably arranged on the glue filling tool, a piston ring arranged in the defoaming ring in a sliding mode, an operation piece arranged on the defoaming ring and an isolation assembly arranged on the bottom wall of the defoaming ring. The cable connector has the effect of ensuring the connection reliability between the cable and the connector.

An annular groove is formed in a valve body, a piston ring and a valve seat ring are arranged in the annular groove, a movable valve seat is arranged at the front end of the valve seat ring, the movable valve seat is matched with a butterfly plate in a conical surface hard sealing mode, and a drainage hole is formed in the bottom of the annular groove. A reverse medium enters the annular groove through the drainage hole to push the piston ring, the piston ring pushes the valve seat ring, and the valve seat ring pushes the movable valve seat, so that the movable valve seat is wedged on the sealing surface of the butterfly plate; when a medium flows in the forward direction, the downstream is a low-pressure area, the piston ring is pushed to the bottom of the annular groove, the valve seat ring and the movable valve seat are pushed by the medium to be tightly attached to the sealing face of the butterfly plate, the larger the medium pressure is, the larger the sealing force is, and the medium pressure self-sealing effect is achieved; the movable valve seat is pushed by a medium to be tightly attached to the sealing face of the butterfly plate for compensation, and therefore the whole sealing pair can keep the sealing performance of a new valve after being opened and closed at high frequency.

A thermal ablation-resistant, wear-resistant, and friction-reducing coated piston ring, a preparation method thereof and an engine are provided. An outer circumferential surface of a piston ring material matrix includes, from bottom to top, a wear-resistant and friction-reducing layer and a protective layer, and the protective layer is a single nitride layer or a multi-element nitride layer. The piston ring is arranged with the wear-resistant and friction-reducing layer and the protective layer from bottom to top. When the piston ring is installed in the engine, the high-temperature and high-pressure gas flow impacts the piston ring and contacts the protective layer on the surface of the piston ring, while the inner diamond-like carbon coating (DLC) functional layer is completely “encapsulated” and protected by the outer protective layer. The protective layer possesses higher ablation resistance compared to the DLC layer, effectively preventing phase transformation in the internal DLC layer.

The application relates to the technical field of compressors and discloses a gas piston assembly for an ultrahigh-pressure liquid-drive piston compressor, which comprises a gas piston body, a sealing element and a connecting element; the gas piston body comprises oppositely arranged first and second body parts, a cylindrical protruding part is arranged at the center of the end face of one side of the first body part, and the second body part is provided with a positioning insertion hole matched with the cylindrical protruding part at the center of the end face opposite to one side of the first body part; the sealing element comprises a plurality of first piston rings and a plurality of second piston rings, the plurality of first piston rings and the plurality of second piston rings are all sleeved on the cylindrical protruding part and are alternately arranged, and the first piston rings are arranged close to the end face of the first body part; the connecting element is used for connecting the first body part and the second body part together after the cylindrical protruding part is inserted into the positioning insertion hole; the combined piston ring is used for replacing the traditional pan piston structure for sealing, and can solve the sealing problem caused by the extremely high pressure and temperature under the ultrahigh-pressure working condition.

The present application relates to the technical field of piston ring production, in particular to a piston ring mouth side chamfering equipment and chamfering method, which comprises a base, the top of the base is provided with a supporting plate, the opposite sides of the top of the supporting plate are symmetrically provided with a pressing plate assembly, the two ends of a feeding channel are respectively a processing end and a feeding end, the processing end of the feeding channel is provided with a positioning pin matched with the opening of the piston ring, the feeding end of the feeding channel is provided with a feeding mechanism, and the feeding mechanism is used for conveying the piston ring, the base, the supporting plate, the feeding mechanism and the positioning pin are arranged, and the motor and the grinding rod are matched for processing during processing, so that the piston ring can be positioned through the positioning pin and the pressing plate assembly during the processing of the mouth side chamfering, and automatic feeding is realized through the feeding mechanism, so that the piston ring mouth side chamfering realizes standardization and mass production, that is, precise processing and automation can be realized, and the processing efficiency and precision of the opening side chamfering of the piston ring are improved.

The invention belongs to a sealing structure and aims to solve the problem that an existing piston sealing structure used in liquid hydrogen filling is affected by the low-temperature and high-pressure environment. The sealing structure suitable for the low-temperature liquid hydrogen pump and the low-temperature liquid hydrogen pump comprise a piston rod body arranged in an inner cavity of a pump body, and a plurality of piston rings are installed on the outer wall of the sealing end of the piston rod body in the axial direction. An elastic piece is arranged between the piston ring and the outer wall of the sealing end, and the piston ring and the elastic piece form a radial sealing structure. Meanwhile, the radial sealing structure abuts against one axial end of the sealing groove, an elastic cushion piece is arranged between the radial sealing structure and the other axial end of the sealing groove, and the elastic cushion piece and the radial sealing structure form an axial sealing structure. The sealing structure is less affected by the low-temperature and high-pressure environment, the sealing performance is greatly improved, the service life can be effectively prolonged, and leakage is reduced.

The utility model relates to the field of shock absorbers, in particular to a shock absorber of a rebuilt valve structure. Relates to the field of shock absorbers and comprises a piston rod, a gasket arranged at the top end of the piston rod, a spring piece located at the bottom of the gasket, a circulation valve piece arranged at the bottom of the spring piece and a nut arranged on the outer side of the bottom end of the piston rod, a spiral spring is arranged on the outer side of the nut, and a shock absorption assembly is arranged in the middle of the piston rod. The damper has the advantages that the influence of spring load fluctuation on damping force is reduced by adjusting the distribution of the inner holes of the piston; a piston ring with a height difference sealing valve plate is omitted, and an O-shaped ring is adopted for sealing, so that the indicator curve is smoother after the shock absorber is durable; the circulation area of an inner hole of the piston is changed through the cover hole valve plate, high-speed recovery damping force adjustment is achieved, and new pistons with different inner holes do not need to be developed.

The invention discloses an anti-abrasion structure for a piston ring of a reciprocating gas compressor, belongs to the technical field of gas compressors, and aims to solve the technical problems that the piston ring of the existing reciprocating gas compressor is easy to abrade, uneven in lubrication, poor in air inlet filtering effect and insufficient in transmission stability. According to the technical scheme, the air compressor is characterized by comprising an air storage tank, a protective shell, a mounting sleeve, a sealing plate, a connector, a rotating circular plate, a driven shaft, a compression assembly, a driving assembly, an air inlet cylinder and a filtering assembly and further comprising an air inlet connector and a connecting pipe; an L-shaped plate and a piston plate are arranged on the side portion of the piston ring and matched with an oil groove and a permeation hole to achieve precise lubrication, the filtering assembly adopts a conical filtering net and a circular filtering cylinder to conduct double filtering and is convenient to disassemble, assemble and clean, the driving assembly is matched with a synchronizing wheel through a servo motor for transmission to guarantee stable operation, and compressed gas is fed into a gas storage tank through a gas inlet connector after being gathered through a connecting pipe.

The application discloses a full-automatic milk boiling pot capable of automatically boiling milk without overflowing, which comprises a pot body, a handle, an inner tube, a movable rod, a pot cover, a pressure sensor, a gas permeation hole, a control button panel, an interface, a bottom plate, an insulating plate, a heating disc, a control panel, a fixing column, a supporting block, a discharging cylinder, a connecting pipe, a rack, a temperature sensor, a servo motor, a gear, a first missing groove, a second missing groove, a trapezoidal plug, a guide rod, a first spiral spring, a guide plate, a guide hole, an iron plate, an electromagnet, a fixing frame, a liquid level sensor, a circular ring groove, a connecting rod, a straight cylinder, a discharging hole, a piston ring, a fixing ring, a second spiral spring, a lower blocking ring, an upper blocking ring, a third spiral spring and a gate plate. The application has the advantages of being used for automatically boiling milk, and compared with the traditional technology, the pot cover can be automatically opened during the milk boiling process, the foaming caused by the boiling of the hot milk cannot be discharged, the foaming foam can automatically fall down, and the overflow can be avoided.

The utility model relates to the technical field of engine pistons, in particular to an engine piston which comprises a piston body, the piston body comprises a top, a head and a skirt, the top, a cylinder cover and a cylinder wall jointly form a combustion chamber, and a first piston groove, a second piston groove and a third piston groove are formed in the periphery of the head. The skirt part is provided with a connecting hole for connecting a piston bolt; piston ring check blocks are arranged in the first piston groove, the second piston groove and the third piston groove and arranged in a staggered mode. A first gas ring, a second gas ring and a combined ring are respectively clamped on the first piston groove, the second piston groove and the third piston groove; the combined ring comprises a detachable ring body, an upper scraping piece, a lower scraping piece and a lining spring, wherein the upper scraping piece and the lower scraping piece are arranged on the upper side and the lower side of the ring body respectively, and the lining spring is arranged in the ring body and used for providing axial elastic force. The problem that a piston ring in a traditional engine piston is troublesome to mount and dismount is solved.

This cylinder has an inner wall surface on which a piston with a piston ring slides, and a plurality of recessed portions (14) formed in a stroke central region of the inner wall surface (12) by laser processing such that the surface roughness of a bottom surface (14A) of each recessed portion (14) satisfies at least one of a first state in which a core-portion level difference (Rk) after polishing the bottom surface is less than 1.6 μm, a second state in which a protruding valley-portion depth (Rvk) after polishing the bottom surface is less than 1.3 μm, a third state in which the core-portion level difference (Rk) after performing a chemical conversion treatment and polishing on the bottom surface is less than 1.1 μm, and a fourth state in which the protruding valley-portion depth (Rvk) after performing the chemical conversion treatment and polishing on the bottom surface is less than 0.9 μm. Consequently, friction resistance is reduced, fuel efficiency is improved, or oil consumption is reduced.

The present invention discloses a diesel engine crankcase active safety monitoring system and method, the diesel engine crankcase active safety monitoring system comprising: a blowby monitoring module, which is used to monitor the blowby gas flow rate of the engine crankcase; an oil and gas monitoring module, which is used to monitor the oil mist concentration of the engine crankcase; an engine-side monitoring box, which is used to collect the blowby gas flow rate, the oil mist concentration, the engine speed and the engine torque, and send them; a cloud server, which is used to determine the degree of wear of the engine piston ring and the main bearing according to the blowby gas flow rate, the oil mist concentration, the engine speed and the engine torque sent by the engine-side monitoring box through a trained transfer learning model, thereby realizing accurate monitoring of the engine crankcase blowby condition, and accurately identifying the degree of wear of the engine piston ring and the main bearing through the transfer learning model, thereby realizing real-time monitoring of the healthy online status of the engine.

This utility model discloses a wear-resistant rubber piston, relating to the field of hydraulic cylinder piston technology. It includes a first piston ring, with a second piston ring fixedly sleeved on the outer side of the first piston ring. An annular cavity is formed inside the first piston ring, and a wear-resistant mechanism is provided at the annular cavity. The wear-resistant mechanism includes a first elastic ring and a second elastic ring, with multiple springs and multiple buffer airbags spaced apart between them. The first piston ring compresses the first and second elastic rings, thereby buffering and absorbing external forces. The multiple springs connect the first and second elastic rings into a whole, improving the resistance to external forces. The multiple buffer airbags absorb the pressure on the first and second elastic rings, further enhancing the buffering and absorption of external forces, thus improving the overall pressure resistance and wear resistance of the rubber piston.

The utility model relates to semi-automatic engine piston ring installation equipment which comprises a deck plate, two oil ring stock bins are arranged on the left side and the right side of the deck plate, and a gas ring double-stock bin is arranged on the rear side of the deck plate. Eight first linear guide rails arranged in the radial direction are arranged between the double gas ring stock bin and the two oil ring stock bins, each first linear guide rail is slidably connected with a piston ring guide block with an extending rod, four guide grooves are formed in each piston ring guide block in the vertical direction, the two upper guide grooves are oil ring guide grooves, and the two lower guide grooves are oil ring guide grooves. The two lower guide grooves are gas ring guide grooves; the deck plate is provided with a piston ring pushing mechanism used for pushing the piston ring on the bottommost layer in the stock bin into the piston ring guide groove. And a ring expanding claw mechanism is arranged below the deck plate. The piston ring storage device not only can be used for storing piston rings, but also can meet the production line assembly of mounting two gas rings and two oil rings on automation equipment at a time.

The utility model discloses a threading rod for a piston ring, which is applied to the technical field of piston rings and comprises a telescopic rod body and a threading rod body, a threaded shaft which is in threaded connection with the threading rod body is rotatably connected inside the telescopic rod body in a penetrating manner, and a linear chute is arranged on the surface of the threading rod body. The threaded shaft is rotated to be in threaded engagement with the threading stick body, the length of the telescopic stick body and the length of the threading stick body can be adjusted, and the diameter of the extending part is consistent with the diameter of the surface of the telescopic stick body and the diameter of the surface of the threading stick body through the extending rod. Therefore, the inner diameter of the piston ring is supported, and the surface penetrating stability of the piston ring is guaranteed. The trapezoidal clamping block pops up to the surface of the threading rod body through the elastic force of the spring, and the piston ring threaded on the surface of the threading rod body is automatically limited, so that the piston ring is prevented from sliding and falling off. And meanwhile, the trapezoidal clamping block can be retracted into the threading rod body by actively rotating the threaded rod, so that the piston ring is taken out from the surface of the threading rod body, and the practicability of the threading rod is improved.

The invention relates to a piston ring. A piston ring (100) for a piston of a reciprocating internal combustion engine comprises a ring section (1) and a lock section (2). The lock segment (2) comprises a circumferential parting line (7) at a first axial parting line distance (PaT) from the top surface (T) of the piston ring (100) and at a second axial parting line distance (PaB) from the bottom surface (B) of the piston ring (100). Furthermore, the piston ring (100) comprises an arcuate profile (10) having a circumferential pivot line (8) at a first axial pivot line distance (PiT) from the top surface (T) and at a second axial pivot line distance (PiB) from the bottom surface. The axial distance (9) between the circumferential parting line and the pivot line is less than 20% of the axial width of the piston ring. The arcuate profile (10) may include a most protruding, axially extending flat section (14). The flat section (14) comprises a circumferential parting line (7).

The internal combustion engine piston capable of reducing abrasion comprises a piston body and a piston head, the piston body and the piston head are fixed, a piston ring groove is formed in the outer wall of the circumference of the piston head, a sealing ring is fixedly connected in the piston ring groove, a plurality of reinforcing rings are fixed in the piston head, the piston body comprises a high-temperature-resistant filling layer, and the high-temperature-resistant filling layer is arranged in the piston ring groove. A high-temperature-resistant filling layer is fixedly connected to the outer side of the plug body, a wear-resistant layer is fixedly connected to the outer side of the high-temperature-resistant filling layer, the high-temperature-resistant filling layer is made of aluminum alloy or nickel alloy, the wear-resistant layer is a dlc coating or a high-silicon aluminum alloy coating, and an assembly hole is formed in the bottom of the plug body. According to the wear-resistant piston, the high-temperature-resistant filling layer and the wear-resistant layer are matched for use, so that the piston body is more wear-resistant and high-temperature-resistant, the service life of the piston is prolonged, meanwhile, the piston and an external device can be connected more tightly through the sealing ring, and the piston head can be firmer and more durable through the reinforcing ring.

To provide a piston ring for providing sufficient sealing and long life durability of the piston ring and a cylinder liner.SOLUTION: A piston ring 100 for a piston of a reciprocating internal combustion engine includes a ring part 1 and a locking part 2. The lock 2 comprises a circumferential parting line at a first axial parting line distance from the top side T of the piston ring 100 and at a second axial parting line distance from the bottom side B of the piston ring 100. Further, the piston ring 100 comprises a cambered contour, wherein the cambered contour comprises a circumferential pivot line having a first axial pivot line distance from a top surface T of the piston ring 100 and having a second axial pivot line distance from a bottom surface. According to the invention, the axial distance between the circumferential separation line and the pivot line is less than 20%, preferably less than 10%, of the axial width of the piston ring.SELECTED DRAWING: Figure 1

The application discloses a container explosive non-opening box intelligent checking device based on ion mobility spectrometry, which comprises a connecting outer frame, a hydraulic cylinder is internally installed in the connecting outer frame, a hydraulic pump is connected to one end of the hydraulic cylinder, and a first piston is movably connected in the hydraulic cylinder. The ion mobility spectrometer and a separately designed collecting device are integrated into one equipment, a user carries the equipment by means of shoulder carrying, and a handle is equipped to facilitate holding. The air suction pipe is placed at the ventilation position of the container, the threaded rod and the first piston are driven to move transversely by hydraulic oil, the sample is pushed to the ion mobility spectrometer for analysis and detection, before the next sample test, the threaded rod is driven by the hydraulic oil to drive the polishing blade to rotate in the air suction pipe, the internal powder is scraped, the transverse thrust generated by the piston ring can extrude the gas in the air suction pipe, and thus the whole cleaning process is completed, the residues after each detection are greatly reduced, and the accuracy of the next extraction detection is avoided.

The utility model discloses a material distributing device for piston ring machining. The material distributing device comprises a material distributing table and a material supplementing mechanism connected with the material distributing table. The material supplementing mechanism comprises a linear module connected with the material distributing table; the arrangement module is connected with the linear module and comprises an arrangement barrel connected with the linear module, a plurality of groups of closing units arranged in the arrangement barrel and a jacking unit mounted at the bottom of the arrangement barrel; each closing unit comprises an arrangement air cylinder connected with the arrangement barrel and an arrangement arc plate which is installed at the output end of the arrangement air cylinder and located in the arrangement barrel, and a circle is formed when the arrangement arc plates of the multiple closing units are closed. According to the sorting device, the sorting module is designed, inward folding is conducted through the multiple sets of folding units, then irregular circular machining materials are aligned, and the aligned circular machining materials are jacked into the discharging barrel through the jacking unit so that material distribution work can be conducted.

The utility model discloses a piston ring finishing machine which comprises a mounting bracket, a horizontal rubber roller assembled on the mounting bracket through a pair of bearings, a motor in transmission connection with the end part of the rubber roller, a pair of mounting units symmetrically arranged on the mounting bracket, and a supporting pipe unit of which the two ends are respectively and detachably assembled on the pair of mounting units, the supporting pipe is parallel to the rubber roller when the supporting pipe is assembled on the mounting unit, the positioning clamping strip can be assembled on the outer wall of the supporting pipe in a detachable mode at the same length, the rubber roller makes contact with the bottom side of the piston ring so as to drive the piston ring to rotate, and the positioning clamping strip is detachably assembled on the supporting pipe. A large number of customized pipes matched with the equipment can be prevented from being customized, and the cost input is reduced; in the using process, only the positioning clamping strip needs to be assembled on the supporting pipe, the piston ring does not need to be transferred between the supporting pipe and the customized pipe, and the working efficiency is improved.