133 results about "Lip seal" patented technology

The invention discloses a cabin-penetrating cable sealing assembly with a combined rubber ring, and relates to the field of cable cabin-penetrating sealing, and the cabin-penetrating cable sealing assembly comprises a cabin-penetrating pipe body and at least one sealing ring assembly. The cabin penetrating pipe body is provided with a pipe cavity which extends in the axial direction and allows a cable to penetrate through. The pipe cavity is divided into an in-cabin section and an out-cabin section. The sealing ring assembly comprises a set of lip-shaped sealing rings, lips of the set of lip-shaped sealing rings face the outside of the cabin, the in-cabin section is filled with the lip-shaped sealing rings in an overlapped mode in the axial direction, the cable is sleeved with the lip-shaped sealing rings, and the lip-shaped sealing rings comprise a main sealing ring and an auxiliary sealing ring. The gap between the cable and the cabin penetrating pipe body is filled with the main sealing ring. The auxiliary sealing ring fills a gap between the cable and the cabin penetrating pipe body, and the auxiliary sealing ring and the main sealing ring are arranged in an overlapped mode. The elasticity of the auxiliary sealing ring is smaller than that of the main sealing ring, and the abrasion resistance of the auxiliary sealing ring is larger than that of the main sealing ring. The cabin-penetrating cable sealing assembly with the combined rubber ring is high in sealing reliability.

The utility model discloses a magnetic confinement large-diameter lip-shaped sealing system for a rotating shaft, which is characterized by comprising a rubber seal (1), a magnetic rubber ring (2), a support ring (3), a rotating shaft (4) and a sealing cavity (5), the magnetic rubber ring (2) is embedded in the rubber seal (1), the support ring (3) is arranged in the sealing cavity (5), and the rotating shaft (4) is arranged in the sealing cavity (5). And the rubber seal (1) is fixed between two adjacent support rings (3). According to the oil seal, appropriate radial force can be provided by controlling the magnetic force of the magnetic rubber ring (2), when the lip is abraded, the magnetic rubber ring (2) is closer to a rotating shaft (4), the magnetic force is increased, the radial force reduced due to the abrasion of the lip is compensated, and then the radial force of the oil seal lip is maintained at a relatively stable level for a long time.

A seal assembly (32) includes a wear sleeve (34), the wear sleeve having an outer sleeve surface (44) made of a fluoropolymer material and a lip seal (36) made of an elastic material and fitted upon the wear sleeve. The lip seal defines a seal axis (18) extending between a first axial seal end (20) and a second axial seal end (20) and includes an outer seal surface (52) and a circumferentially extending inner seal surface (54) forming an opening receiving the wear sleeve. The lip seal further includes a sealing lip (58) in sealing contact with the outer sleeve surface.

An improved multiport rotary valve assembly is disclosed for fluid control systems, particularly in direct lithium and mineral extraction applications. The assembly features a valve body comprising a housing ring, upper and lower closure discs, and a process disc, with advanced polymeric seals, including radial and lip seals, ensuring robust sealing engagement. A mechanically biased tensioning assembly, incorporating tension springs and load cells, maintains consistent sealing compression, mitigating issues of under-engagement and over-engagement caused by thermal and pressure variations. The valve assembly reduces leakage, cross-contamination, and seal degradation, enhancing extraction rates, operational efficiency, and seal longevity. Real-time monitoring and feedback mechanisms enable precise adjustments during startup, operation, and cooldown, minimizing manual intervention and downtime. This design addresses stringent purity requirements in direct lithium extraction while supporting high throughput and reliable performance under demanding conditions.

The utility model relates to the technical field of drilling tools, in particular to a full-hydraulic bidirectional jar for a high-energy coiled tubing, which comprises a wash pipe assembly, a cone valve, a pressure energy shell and a transmission assembly, the wash pipe assembly comprises a wash pipe, a wash pipe shell and a first lip-shaped sealing component arranged in the wash pipe shell; the cone valve and pressure energy shell comprises a first cone valve, a second cone valve and a pressure energy shell; the transmission assembly comprises a spline punching shaft, a spline shell and a pressure regulating ring; the first cone valve and the second cone valve are fixed to the spline punching shaft through the first sealing ring and the second sealing ring respectively, the spline punching shaft is connected with the pressure energy shell in a matched mode through a spline, and the pressure adjusting ring is arranged in an axial adjusting groove of the spline punching shaft in a sleeved mode. By means of the full-hydraulic two-way jarring structural design, two-way controllable jarring under the lifting and pressing working conditions is achieved, and the limitation of a traditional one-way jar is solved.

The invention provides an abrasion monitoring sealing ring structure, a forming process and a sealing device, the abrasion monitoring sealing ring structure comprises a lip-shaped sealing ring, the lip-shaped sealing ring is provided with a base and a lip part which are connected, a transition part is formed between the base and the lip part, and a mounting groove extending to the transition part and the base is formed in the lip part; the flexible circuit board is provided with a first fixed end part, an elastic telescopic part and a second fixed end part which are sequentially connected along the length direction of the flexible circuit board, the flexible circuit board is arranged in the mounting groove, the first fixed end part and the second fixed end part are respectively fixed on the lip part and the base, and the elastic telescopic part corresponds to the transition part; under the state that the angle between the base and the lip part is changed, the elastic telescopic part located on the transition part is stretched or shortened; and the first fixed end part can be worn along with the lip part so as to change a monitoring electric signal formed in the flexible circuit board. According to the invention, the problems of low monitoring precision, weak reliability, difficult installation and poor practicability of the current shield main drive seal can be solved.

The application discloses an integrated buffer seal engineering machinery oil cylinder and relates to the technical field of oil cylinders, which comprises a cylinder body, a piston and a piston rod, a buffer seal assembly is arranged outside the piston, the buffer seal assembly comprises a buffer column arranged at the front end and two lip-shaped sealing rings, a base is arranged at the bottom of the cylinder body, a buffer groove is formed in the base, and a throttle hole is formed in the base. The integrated design of the buffer and the sealing structure achieves multistage attenuation of impact load, dynamic adjustment of sealing force and self-adaptive control of oil flow, the cylinder hydraulic pressure dynamically adjusts the throttle hole diameter, cooperates with the multistage buffer structure, and reduces the impact pressure; meanwhile, the temperature self-adaptive flow control system can intelligently adjust the flow rate according to the change of the hydraulic oil viscosity, actively enhances the sealing tightness under high-temperature working conditions, effectively inhibits leakage, automatically optimizes the starting parameters in a low-temperature environment, and improves the equipment response speed.

The utility model belongs to the technical field of lip sealing rings, and particularly relates to a lip sealing ring of a new energy automobile, which comprises a sealing ring body, a plurality of groove bodies are arranged on the surface of the sealing ring body, the groove bodies are used for increasing the number of contact surfaces generated when the sealing ring body is used for sealing, and a cavity is arranged inside the sealing ring body. The cavity is used for containing lubricating materials, a plurality of through holes are formed in the sealing ring body in a penetrating mode and communicated with the cavity, the sealing ring body is provided with a top face, a bottom face, an inner wall and an outer wall, and the groove bodies are arranged on the inner wall and the outer wall of the sealing ring body. The lubricating material in the cavity is conveyed to the surface of the sealing ring body through the through holes, so that the friction force borne by the surface of the sealing ring body is reduced, the friction resistance between the first sealing ring and the inner wall of the engine is reduced, the friction damage speed of the first sealing ring is reduced, and the service life of the sealing ring body is prolonged.

The invention discloses a self-adaptive intelligent regulation and control lip sealing device based on a slide valve mechanism. The device comprises a sealing ring body, an air spring, a rigid framework, a main air channel, the slide valve mechanism, an auxiliary lip O-shaped ring, an auxiliary lip air channel, a spoke type radial air channel and a pressure sensor. A slide valve mechanism responds to pressure fluctuation monitored by a pressure sensor, and dynamically controls gas to flow among a main gas channel, a radial gas channel and an auxiliary lip gas channel, so that self-adaptive adjustment of the holding force of a main lip part is realized: when overpressure is caused by vibration, gas is exhausted to an auxiliary lip to enhance sealing and active chip removal; and when low pressure is caused by abrasion, the holding force is recovered through air supplementation. The working mode comprises a normal cut-off state and automatic adjustment circulation, and the slide valve mechanism automatically resets after pressure balance. Control units are evenly arranged in the circumferential direction of the device, non-uniform pressure is monitored and coped independently, the exhaust-sealing-self-cleaning synergistic effect is formed, the sealing reliability and dynamic stability are remarkably improved, and the service life is remarkably prolonged.

The utility model relates to a low-temperature two-way lip-shaped sealing floating ball valve which comprises a valve body, a valve cover, a ball body, a valve seat, a valve rod, a support and a transmission mechanism, the valve seat is of a floating structure, the support is of a lengthened structure, and a heat insulation plate is arranged in the middle of the support. Composite sealing devices composed of sealing washers and pressure self-sealing devices are arranged between the valve body and the valve deck and between the valve body and the support respectively, medium pressure pushes wedge-caulking rings of the pressure self-sealing devices to open sealing between the two sides of elastic expanding and shrinking rings and the valve body, between the valve deck and the support and between the valve body and the support, and self-sealing between the valve body and the valve deck and between the valve body and the support is achieved. The problem that the sealing performance between the valve body and the valve cover and between the valve body and the support is reduced due to shrinkage of the sealing washer under the low-temperature working condition is solved, and zero leakage is achieved. The sealing device is reliable in sealing performance and suitable for working conditions of low-temperature media such as liquid nitrogen, liquid oxygen and liquefied natural gas.

A solenoid valve according to an embodiment of the present invention is installed in a valve block and controls flow between a first flow path and a second flow path of the valve block. The solenoid valve includes: a seat member having an orifice that fluidly connects the first flow path and the second flow path; an armature configured to selectively open and close the orifice through a forward and backward movement so as to selectively form a main flow path connecting the first flow path and the second flow path; a magnet core configured to provide a driving force capable of causing movement of the armature for selective formation of the main flow path; a filter member installed so as to filter out impurities contained in oil flowing between the first flow path and the second flow path; and a check valve structure configured to form a unidirectional auxiliary flow path connecting the first flow path and the second flow path. The check valve structure includes: one or more oil passages provided in the filter member; and a lip seal disposed in a space connected to the oil passage. The lip seal is disposed in a space between the filter member and the valve block so as to be installed in a state supported by the filter member and the valve block.

To provide a lip seal device that can prevent the rotation of the sealing member over a long period of time. [Solution] The device comprises an annular sealing member 2 having a base portion 21 positioned on the fixed-side element 3 side and a lip portion 22 positioned on the rotating-side element 5 side, and a sleeve 4 that sandwiches the base portion 21 together with the fixed-side element 3, and the rotation of the sleeve 4 and the fixed-side element 3 is restricted by anti-rotation means 342, 432.

The present disclosure discloses a pipe and coupler assembly (100) made of polyvinyl chloride. The assembly includes a pipe (101) having a first end (101a) and a second end formed with a plurality of external threads (102). The assembly includes a coupler (103) comprising a first coupling end and a second coupling end having a plurality of internal threads (104). The first end of the pipe is non-removably coupled to the first coupling end. A locking means (107) is inserted into a first annular groove (105) formed in the first coupling end to secure the first end of the pipe to the first coupling end.Further, a second annular groove (108) is defined in the flat portion (103c) of the coupler, and a first multi-lip sealing ring (109) is housed in the second groove (108) to form a sealing gasket between the first end of the pipe and the first coupling end.

This invention relates to the field of sealing technology and discloses a method for predicting dynamic leakage channels in rotary seals at high-pressure rotor shafts of aero-engines, considering viscoelasticity. The invention includes the following steps: constructing a fully coupled viscoelastic-temperature-centrifugal constitutive model; establishing and solving a multi-field coupled dynamic simulation model; dynamically characterizing the leakage channel and identifying critical parameters; and finally outputting the predicted results of the dynamic leakage channel and the sealing safety boundary. This provides a quantitative theoretical basis for the anti-leakage design and reliability assessment of lip seal structures in aero-engines. By constructing a fully coupled viscoelastic-temperature-centrifugal constitutive model, this invention integrates hyperelasticity, broadband viscoelasticity, and temperature effects to accurately quantify the phase lag angle under high-frequency operating conditions. It clarifies the core mechanism of viscoelastic hysteresis leading to dynamic lip follow-up failure, achieving a profound revelation of the physical root cause of dynamic leakage channel formation and overcoming the limitation of traditional static theory in explaining high-speed dynamic seal failure.

The utility model relates to a rubber lip seal and lip seal snap spring assembly tool which comprises a press bottom plate, a lip seal press-fitting pump positioning assembly, a rubber lip seal containing box, a start button and a press body, wherein the lip seal press-fitting pump positioning assembly is fixed above the press bottom plate and used for positioning a compressor, and the rubber lip seal containing box is used for containing a lip seal. And a pressure head transition plate driven by a driving cylinder is arranged on one side of the press body. The utility model relates to the technical field of assembly of rubber lip seals and lip seal snap springs. According to the rubber lip seal and snap spring integrated assembly tool, after the pressing head assembly makes contact with the lip seal snap spring, pressure is continuously exerted on the pressing head assembly, the lip seal snap spring shrinks and moves downwards along the lip seal snap spring guide-in tool, the pressing head assembly is continuously pressed downwards to make contact with the lip seal snap spring guide-in tool, a rubber lip seal and the lip seal snap spring are pressed in place, and assembly is completed; and the pressure head assembly is in contact with the clamp spring guide-in tool for limiting, so that the lip seal is prevented from being damaged due to too deep pressing, and the mounting precision is ensured when the rubber lip seal and the lip seal clamp spring can be quickly and effectively mounted.

The utility model discloses an oil film bearing axial module combination multi-lip sealing device which comprises a sealing cover, a water seal, an aluminum ring and an annular rubber sealing device, the sealing cover is installed on a bearing seat, the water seal is installed on the sealing cover, and a rubber lip of the water seal is matched with the end face of a roller in a sealing mode. The annular rubber sealing device is arranged on the roller neck conical surface of the roller in a sleeved mode, the left side and the right side of the annular rubber sealing device are axially positioned through the aluminum ring and a conical sleeve of the oil film bearing respectively, and the annular rubber sealing device can be in sealing fit with the roller neck conical surface and the inner hole face of the sealing cover respectively. The annular rubber sealing device is composed of an annular rubber sealing module A, an annular rubber sealing module B and an annular rubber sealing module C which are sequentially arranged from left to right, and the annular rubber sealing module A, the annular rubber sealing module B and the annular rubber sealing module C are in axial positioning connection. When the annular rubber sealing device is installed and used, the posture of the annular rubber sealing device is relatively stable, and the sealing effect is better.

The utility model relates to polycarbonate reactor technical field, concretely relates to a kind of polycarbonate final polymerization reactor shaft seal disassembly tool, including fixed base, U-shaped movable plate, reaction shaft main body, lip seal, clamping plate, top plate and first pull plate, the U-shaped movable plate is set in the top of fixed base, the reaction shaft main body is set in the top of U-shaped movable plate, the lip seal is set in the inside of reaction shaft main body, the clamping plate is set in the inside of lip seal;Second screw is installed by the second threaded hole of top plate top, second screw can be stably connected with top plate, then second screw is penetrated first pull plate, when adjusting nut outside second screw is evenly fastened, the height of top plate changes, lip seal is slowly ejected with the spacer ring on it by top plate, it is convenient to disassemble and assemble the spacer ring and lip seal of polycarbonate final polymerization reactor shaft seal, and the outer surface of lip seal and spacer ring is not damaged in disassembly process, and the practicality is higher.

The application belongs to the technical field of seal component design, and discloses a high-speed dynamic seal rotary joint suitable for super-low-temperature fluid, which mainly comprises a static shaft, a rotary shell, a super-low-temperature seal ring, a guide ring and a check ring. The high-speed dynamic seal rotary joint suitable for super-low-temperature fluid is used to realize the integration of the blocking flow, the labyrinth and the multi-stage lip seal structure in the limited space. The shrinkage deformation of the super-low-temperature seal ring in the super-low-temperature environment can be obviously inhibited by optimizing the base material of the super-low-temperature seal ring and additionally arranging the anti-shrinkage ring structure. The interference amount of the matching surface of the super-low-temperature seal ring is reasonably adjusted, so that the close contact of the lip seal interface in the super-low-temperature environment is ensured.

The utility model relates to lip seal ring technical field, concretely is a kind of lip seal ring, including static seal, the both sides of static seal are provided with upper sealing end and lower sealing end, extrusion layer is provided on the inner wall of static seal, extrusion layer is connected with dynamic seal, loading groove is set up on dynamic seal, extrusion ring is set in loading groove, loading groove can bear extrusion ring by being set on dynamic seal, dynamic seal tight fitting surface and equipment are tightly attached under liquid low pressure state by extrusion ring, so that it guarantees certain sealing, can further improve the sealing property of dynamic seal tight fitting surface and equipment under liquid high pressure state.

The utility model discloses a sealing structure, including the body, the body center is equipped with the axle hole, the axle hole is used for the main shaft of wearing, the axle hole top is equipped with the mounting groove, be equipped with a plurality of tetrafluoro lip seal in the mounting groove, the tetrafluoro lip seal includes the framework and the inner ring, the framework is circular ring shape, the inner ring sets up in the inside of framework, the inner side of inner ring is equipped with a plurality of lip edge, the sealing structure of the utility model adopts a plurality of tetrafluoro lip seal to the gap between sealing main shaft and body, simple structure, convenient installation, and the lip edge of tetrafluoro lip seal has the elasticity, has the self -compensation ability after wearing, therefore can always contact with the main shaft, need not regular maintenance and the service life is longer than the filler seal.

Seal assemblies and systems and their components can be used as pre-packaged seals when installed in a cylinder or cartridge. The seal assemblies have can include restrictor blocks to restrict fluid flow. Sealing washers can be included to add sealing points. In a pre-packaged configuration, the cylinder can be a straight cylinder, a stepped cylinder, or a split cylinder.

The utility model discloses a light waterproof slewing bearing, which relates to the technical field of mechanical equipment, and comprises an inner ring and an outer ring which are coaxially arranged, an annular raceway is formed between the inner ring and the outer ring, and a steel ball and a retainer are arranged in the annular raceway; inner and outer diameter end face sealing grooves extending in the axial direction are formed in the end face of the inner side of the outer ring, inner and outer diameter end face sealing grooves extending in the radial direction are formed in the corresponding position of the inner ring, and the two sets of inner and outer diameter end face sealing grooves jointly form a continuous waterproof structure. A waterproof sealing ring is embedded in the inner and outer diameter end face sealing groove; a lip-shaped sealing ring is arranged on the inner side of the outer ring; and mounting holes are formed in the outer ring. According to the double-lip sealing ring, the flow guide fins quickly guide sputtered water flow to the outer side, and accumulated water permeation is avoided; the oil storage micropores of the engineering plastic retainer can continuously release the lubricating grease, so that the grease supplementing period is prolonged, the volume of the middle oil storage groove can automatically compensate the abrasion of the sealing surface, and the leakage of the lubricating grease caused by sealing failure is avoided.

The present application provides a lip seal device, which can be assembled and disassembled easily. The device comprises a ring-shaped sealing member (2) having a base (21) arranged on the side of a fixed-side element (3) and a lip (22) arranged on the side of a rotating-side element (5); and a sleeve (4) clamping the sealing member (2) together with the fixed-side element (3), the sealing member (2) and the sleeve (4) being arranged to be movable relative to each other, the base (21) having a radial portion (212) extending radially from the lip (22) and being clamped axially by the fixed-side element (3) and the sleeve (4), and an axial portion (212) extending axially from the side of the radial portion (212) opposite to the lip (22) and being clamped radially by the fixed-side element (3) and the sleeve (4).

The utility model provides a large-caliber diaphragm electromagnetic valve which comprises a valve body assembly and a diaphragm, and a transverse inlet, a vertical outlet and a plane type valve port are formed in the valve body assembly. The transverse inlet and the vertical outlet are vertically arranged, the planar valve port and the vertical outlet are coaxially arranged, and the top of the planar valve port is lower than the transverse inlet; the diaphragm is installed in the valve body assembly in a lifting mode and divides an inner cavity of the valve body assembly into an upper valve cavity and a lower valve cavity, and the lower valve cavity is communicated with the transverse inlet and the vertical outlet. A lip-shaped sealing part is arranged at the end, right facing the plane type valve port, of the diaphragm and used for opening and closing the plane type valve port so that the transverse inlet and the vertical outlet can be communicated or disconnected. The large-caliber diaphragm electromagnetic valve overcomes the defect that an existing diaphragm electromagnetic valve is not suitable for large calibers.

The utility model relates to a large combined oil gas seal for a hub, which comprises a T-shaped metal framework with an annular structure, the cross section of the T-shaped metal framework is of a T-shaped structure, and the T-shaped metal framework comprises a vertical section and a horizontal section extending from the middle of the vertical section to the annular center; the main lip sealing group comprises two main lip sealing bodies which are arranged on the horizontal section of the T-shaped metal framework and are symmetrical to each other; the auxiliary lip sealing set comprises two L-shaped ring frames and two auxiliary lip sealing bodies, and the two L-shaped ring frames are arranged on the two sides of the junction of the vertical section and the horizontal section of the T-shaped metal framework correspondingly; and the two secondary lip sealing bodies are respectively arranged on the horizontal arms of the two corresponding groups of L-shaped ring frames. The sealing device is compact in structure, clear in sealing layer and suitable for sealing requirements of large mine car hubs and the like under high-temperature, high-pressure and high-speed rotating working conditions.

This invention discloses a high-precision electrically controlled thermostatic valve that prevents scale buildup, comprising a valve body, a cold water chamber, a hot water chamber, a mixing chamber, a cold water inlet, a hot water inlet, a mixing water outlet, and a regulating valve shaft. The regulating valve shaft is equipped with an inner sealing column section, a cold water annular groove section, and a hot water annular groove section. A cold water opening sealing assembly is coaxially mounted outside the regulating valve shaft within the cold water chamber, and a hot water opening sealing assembly is coaxially mounted outside the regulating valve shaft within the hot water chamber. The cold water opening sealing assembly includes a cold water metal ring and a cold water inner lip seal, and the hot water opening sealing assembly includes a hot water metal ring and a hot water inner lip seal. This electrically controlled thermostatic valve, through an innovative combination structure of metal ring and lip seal, cleverly integrates the functions of scale removal and dynamic zero-leakage sealing, solving the industry pain points of traditional thermostatic valves such as easy scaling, poor sealing, and low regulating accuracy.

An access sheath valve device includes an elongate body defining an inner chamber, a valve seal disposed within the inner chamber, a lip seal member fixed to an inner circumferential surface of the valve seal, and a compression member disposed on the elongate body and configured to be moved between a first position allowing the valve seal to be in an opened configuration and a second position which compresses the valve seal into a closed configuration. The lip seal member is configured to passively seal around a catheter disposed through the valve seal while the compression member is in the first position and the valve seal is in the opened configuration.

A prosthetic hand having one or more digits with a lip seal and a tip, which may be a conductive tip. The lip seal has a cross-sectional profile with a contact finger inclining radially outwardly from a radially inner main body portion. The contact finger can flex to account for variable gap sizes in which the seal is used. Less motor current draw is required for digit actuation as compared to use of an O-ring seal. The lip seal can provide a waterproof seal to the knuckle. The prosthetic digit may include a replaceable, and / or conductive, distal tip. The replaceable distal tips may reversibly couple to the prosthetic digit via push on and removal with a simple tool. The conductive distal tips may harness the capacitance of metallic portions of the digit. Contact of the tip may be recognized by and operable with capacitive touch screens, such as mobile devices.

This disclosure provides an installation device and method for a sealing assembly, belonging to the field of mechanical seal technology. The installation device includes an operating member and a positioning ring. Along the axial direction of the positioning ring, the operating member is located on one side of the positioning ring and connected to it. The operating member is used to insert into the gap between the fixed base and the rotating shaft tube. The positioning ring has an annular mounting groove on the side away from the operating member, which is used to accommodate the lip seal ring. This disclosure can improve the installation quality of the sealing assembly and enhance the sealing effect.

The utility model discloses a lithium battery feeding spiral sealing structure which comprises a shell, an air inlet and an air outlet are formed in the outer side of the shell respectively, a lip-shaped sealing ring, a labyrinth seal and a bearing are arranged in the shell, an installation pipe is arranged on one side of the shell, an organic glass mirror is arranged on the inner wall of the installation pipe, and a sealing ring is arranged on the outer side of the shell. Sealing gas is introduced into the gas inlet to construct a micro-positive pressure environment, a multi-stage sealing system is formed by combining the lip-shaped sealing ring and the labyrinth seal, and the micro-positive pressure can block material leakage and external air invasion bidirectionally; the lip-shaped sealing ring can be tightly attached to the spiral shaft, and elastic compensation is achieved after abrasion. The labyrinth seal reduces the leakage rate through the throttling effect, the three parts work cooperatively, the sealing reliability is remarkably improved, the stability of the internal environment of equipment is guaranteed, and in addition, an organic glass observation window is designed, so that an operator can conveniently check the working condition of a sealing part in real time and find abnormal problems in time.