446 results about "Labyrinth seal" patented technology

The utility model discloses an annular motor and a mill. The annular motor comprises a stator assembly (2), a rotor assembly (3) surrounded by the stator assembly (2), and a first shield (71) located on one side of the stator assembly (2) and the rotor assembly (3). Wherein a first labyrinth seal structure is formed between the first shield (71) and the rotor assembly (3).

A bearing seal provides a first sealing member to be secured to a shoulder on one side of a first bearing ring and a second sealing member that can be secured to a shoulder on the same side of a second bearing ring. A labyrinth seal gap is formed between the first sealing member and the second sealing member, which has at least one tooth-shaped turn. On the basis of the above bearing seal, the present invention further provides a rolling bearing that employs the bearing seal on an axial side thereof.

The invention discloses a shaftless disc type turbine self-powered flow monitoring device. The device comprises a static assembly, a rotating assembly, a bearing and a data collection module which are coaxially arranged. Magnetic induction coils are distributed in the shell in the circumferential direction; the shell end cover is provided with a guide vane; the turbine comprises shaftless fluid power blades and permanent magnets which are uniformly distributed in the circumferential direction, the magnet yoke is rigidly connected with the impeller assembly, and the permanent magnets are arranged in a Halbach array; the dynamic sealing interface adopts a three-stage labyrinth sealing structure; the blade has an NACA airfoil section; the magnetic induction coil is of a three-layer close winding structure. Self-power-generation is achieved through the electromagnetic induction principle, an external power source is not needed, and cost is reduced; the shaftless design reduces mechanical faults, improves the reliability and prolongs the service life; the data processing module can realize high-precision measurement; a three-stage labyrinth sealing structure prevents fluid leakage; the optimized blade parameters adapt to fluid flow; the design of the permanent magnet assembly and the magnetic induction coil enhances the magnetic field and improves the power generation efficiency and the anti-interference capability.

The invention provides a labyrinth sealing structure, and belongs to the technical field of gas turbine and engine sealing, the labyrinth sealing structure specifically comprises a labyrinth disc and a sealing ring, a rotor assembly and the labyrinth disc are coaxial and fixedly connected, a plurality of labyrinth teeth protruding towards a stator assembly are arranged on the peripheral side face of the labyrinth disc, the sealing ring is arranged between any two adjacent labyrinth teeth in a sleeving mode, and the labyrinth teeth are arranged in the labyrinth disc. The sealing ring is of a hollow and internally-closed structure, when the rotating speed of the rotor assembly is smaller than or equal to the first rotating speed, the sealing ring abuts against the labyrinth and the stator assembly, and a gap between the labyrinth and the stator assembly is sealed through the sealing ring; when the rotating speed of the rotor assembly is larger than the first rotating speed, dynamic pressure sealing is formed between the labyrinth and the stator assembly through the pressure difference of the air inlet side and the air outlet side of the labyrinth, the side, facing the stator assembly, of the sealing ring is sunken towards the interior of the sealing ring, and the sealing ring is separated from the stator assembly. According to the treatment scheme, the service life of the labyrinth sealing structure is prolonged.

The utility model relates to the technical field of turbine mechanical sealing, and discloses a double-end-face brush type-labyrinth combined sealing structure, which comprises a shaft sleeve connected with a rotor through a shaft sleeve fastening screw; a sealing seat; the double-end-face brush type sealing ring is fixedly arranged with the sealing seat through a brush ring set screw; the double-end-face brush type sealing ring comprises a first brush wire bundle, a front baffle, a first fusion welding area, a middle baffle, a second fusion welding area, a rear baffle and a second brush wire bundle. The labyrinth sealing ring is arranged on the back face of the double-end-face brush type sealing ring, an O-shaped ring is arranged between the labyrinth sealing ring and the sealing seat, the labyrinth sealing ring is fixed to the shell through a check ring, and the shell is connected with the sealing seat through a screw. The double-end-face brush type seal and the labyrinth seal are combined, the double-end-face brush type seal ring saves more materials and space compared with a conventional two-stage end face brush type seal in series connection, the throttling effect of the labyrinth seal plays an auxiliary sealing role, and therefore the sealing effect is better.

The invention relates to a sealing structure, in particular to a combined sealing structure for an output shaft of a marine gearbox. The problem that an existing sealing component can cause leakage under the conditions that an output shaft is static, low in speed, large in lubricating oil amount, too large in oil pressure and the like is solved. A three-stage combined sealing structure is formed by the oil slinger, the labyrinth sealing ring and the lip-shaped sealing assembly. The oil slinger arranged on the output shaft is simple in structure, convenient to transform and good in economical efficiency. The labyrinth sealing ring not only can meet the sealing requirement of a rotating part, but also has self-adaptive flexural deflection, and can be automatically adjusted in a limited manner, so that a good sealing effect is achieved. The lip-shaped sealing assembly structurally achieves the bidirectional sealing effect, internal lubricating oil can be sealed, and water, dust, silt and other external impurities are prevented from entering the gearbox. Through the application of the combined sealing structure, leakage is reduced step by step. The invention belongs to the technical field of gearbox sealing.

The invention provides a labyrinth sealing structure for enhancing sealing performance through inlet prerotation and interstage prerotation, and relates to the technical field of aero-engine and gas turbine sealing. A rotational flow device is additionally arranged in front of a labyrinth slit, so that flowing generates a tangential component, kinetic energy in the axial direction is decomposed into the combination of an axial component and the tangential component, the axial kinetic energy of airflow is reduced, the ventilation effect of the labyrinth slit is weakened, and then the sealing performance of labyrinth seal is enhanced. The height of the additional rotational flow device is slightly larger than the gap of the labyrinth slit, or the additional rotational flow device is given according to the machining level and does not invade a cavity formed by the labyrinth and the wall face as much as possible, and the total pressure loss induced by geometric sudden expansion is reserved to the maximum extent. The rotational flow ratio of air flow is reduced along with flowing, and in order to guarantee the on-way rotational flow ratio, rotational flow devices are also arranged between the labyrinth stages. For the rotating comb teeth, in order to achieve the maximum pre-swirling effect, the swirling device is arranged on the static wall face.

The invention belongs to the technical field of positive displacement vacuum pumps, and particularly relates to a sealing mechanism of a vacuum pump, which comprises a labyrinth seal and a piston ring seal, the left and right sides of the labyrinth seal and the piston ring seal in the axial direction are respectively provided with an oil cavity and a pump cavity; the radial inner and outer sides of the labyrinth seal and the piston ring seal are respectively provided with a rotor shaft in a pump cavity and an oil tank side sealing plate in an oil cavity; the labyrinth seal comprises a labyrinth seal moving ring and a labyrinth seal static ring, the labyrinth seal moving ring is arranged on the rotor shaft in a sleeving mode and is in linkage with the rotor shaft, and the labyrinth seal static ring is arranged on the labyrinth seal moving ring in a sleeving mode and is fixedly connected with the oil tank side sealing plate; the piston ring seal comprises at least one piston ring; a piston groove is formed in the rotor shaft; or the rotor shaft is sleeved with a piston shaft sleeve, and a piston groove is formed in the outer surface of the piston shaft sleeve; the piston ring is accommodated in the piston groove. Non-contact sealing is completely adopted, the problems of friction heat generation, friction abrasion and the like of a contact lip seal are avoided, the use power consumption of the pump body is reduced, and the quality inspection cost and the manufacturing cost are reduced.

The invention relates to the technical field of isolation of a compression cavity and a bearing of a liquid spraying screw compressor, and discloses an isolation sealing structure and method for the compression cavity of the screw compressor. Comprising a compressor main body, a compression cavity arranged in the compressor main body, a bearing and a rotor shaft mounting channel penetrating through the two ends of the compression cavity, a rotor shaft penetrating through the bearing and the rotor shaft mounting channel, and a bearing mounted at the end part of the rotor shaft, four skeleton sealing elements are sequentially arranged between the compression cavity and the bearing along the axial direction of the rotor shaft to form a three-stage isolation cavity; the four framework sealing pieces comprise the first framework sealing piece and the second framework sealing piece which are close to the compression cavity, and the third framework sealing piece and the fourth framework sealing piece which are close to the bearing. The durability and the reliability of the sealing structure are remarkably improved by adopting the combined design of the multi-stage framework sealing piece and the labyrinth sealing assembly. A three-level isolation cavity is formed through the arrangement of the four framework sealing pieces, a compression cavity and a bearing cavity are effectively isolated, and the possibility of medium leakage 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 sealing mechanism for a rotating mechanism, a rotating mechanism and a sealing method. The rotating mechanism comprises a rotor having a rotary disk (1) and a stator accommodating the rotor. The sealing mechanism comprises a first flow-blocking portion (4), which protrudes and is provided on an end face of the rotary disk (1), wherein a labyrinth seal and a spiral seal are provided in combination at the first flow-blocking portion (4); and a first corresponding flow-blocking portion (5), which is recessed, is provided on an inner surface of the stator and is in clearance fit with the first flow-blocking portion (4). The first flow-blocking portion (4) has a first recessed portion and / or protruding portion (6) on a circumferential surface thereof, the first corresponding flow-blocking portion (5) is flatly constructed or provided, on a circumferential surface thereof, with a first corresponding protruding portion and / or recessed portion (7) which are / is in clearance fit with the first recessed portion and / or protruding portion (6), and the first flow-blocking portion (4) and the first corresponding flow-blocking portion (5) form a labyrinth seal at the corresponding top or bottom section thereof respectively and form a spiral seal at a corresponding side section respectively, which can further suppress fluid leakage, thereby improving the sealing performance.

The invention is suitable for the technical field of grinding, and provides an electric drive intelligent constant force radial compensation system which comprises an intelligent electric radial floating grinding device, the intelligent electric radial floating grinding device comprises a dust cover and a linear motor in the dust cover, and the linear motor is composed of a motor stator and a motor rotor. A grinding tool is arranged at the output end of the linear motor, a fixing base is installed on one side of the linear motor, a cone swinging device and an adjusting ring are installed on the fixing base, and the grinding tool and the cone swinging device are sealed in a labyrinth mode and provided with a labyrinth sealing outer ring and a labyrinth sealing inner ring. According to the scheme, the stability of driving force is improved, the mechanism design is optimized, the response speed for responding to external force changes and sealing are achieved, meanwhile, the influence on output torque is reduced to the minimum, the yield of high-precision polishing can be greatly improved, the polishing technological process is simplified, and the polishing efficiency is improved.

The present invention relates to a labyrinth seal for a turbine engine, in particular of an aircraft, comprising a rotor element and a stator element extending around the rotor element, the rotor element being suitable for rotating relative to the stator element about an axis of rotation having an axial direction (DA), the rotor element comprising an annular lip having an outer radial end extending towards an abradable element (57) carried by the stator element, the outer radial end of the annular lip having a corrugation in the axial direction (DA) and a non-zero axial expanse (E5) associated with the corrugation, the abradable element (57) comprising a plurality of cells (50a, 50b) arranged adjacent to one another along the axial direction (DA) and an ortho-radial direction (O), the cells (50a, 50b) comprising walls which extend in an essentially radial direction, the cells being distributed with a first cell density in a first densified annular zone (Z51) of the abradable element, said densified annular zone (Z51) being located opposite the radial end of the lip, said densified annular zone having an axial expanse less than or equal to the axial expanse of the outer radial end of the lip, the cells being distributed according to a reference density of cells outside said first zone, the first density being greater than the reference density.

The utility model relates to the technical field of Roots vacuum pumps, and discloses a Roots vacuum pump capable of preventing material mixing and oil leakage, which comprises a pump shell, a pump shaft connected in the pump shell and a waist-shaped rotor connected on the pump shaft. Through the labyrinth sealing piece, the nitrogen-filled sealing cavity and the mechanical sealing piece, thorough transformation of a shaft sealing mode between the medium cavity and the lubricating oil cavity is achieved, and the possibility that media in a pump cavity and lubricating oil in an oil cavity are blocked from being mixed due to pressure difference is achieved; due to the injection of nitrogen, the possibility that a medium enters a gap of the shaft seal through the labyrinth sealing element is ensured, and the shaft seal can be prevented from being damaged by crystals; meanwhile, a trace amount of nitrogen does not influence the whole air exhaust performance of the roots vacuum pump; due to the existence of the mechanical sealing piece, a pump cavity and an oil cavity are thoroughly isolated, air flow between the two cavities does not circulate any more, the shaft seal mode is put into use, the field actual effect is good, the problem that lubrication often loses efficacy is fundamentally solved, and dual stability of equipment operation and product quality is achieved.

The utility model relates to the technical field of motor sealing, in particular to a motor sealing structure, which comprises a motor end cover, a motor shaft is inserted in the middle of the motor end cover, a bearing is arranged on the motor shaft, the bearing is fixedly connected with the motor end cover, a framework oil seal is arranged on the outer end face of the motor end cover, and the framework oil seal is sleeved on the motor shaft. And a labyrinth sealing ring covers the outer side of the framework oil seal and is fixed on the motor end cover. The labyrinth sealing ring is additionally arranged, the labyrinth sealing ring is pressed on the motor shaft in an interference fit mode and is integrated with the motor shaft, the labyrinth sealing ring is in clearance fit with the multiple concave labyrinth grooves in the surface of the motor end cover, abrasion is avoided during rotation, permanent sealing can be guaranteed, and friction temperature and mechanical abrasion are reduced.

The invention discloses a high-plasticity labyrinth seal machining method and a machining tool and clamp thereof. A high-plasticity labyrinth seal machining method comprises the following steps that blanking is conducted, specifically, a semicircular blank is cut out and blanked; rough machining is conducted, specifically, rough machining is conducted on the semicircular blank, specifically, milling is conducted firstly, and then rough turning is conducted; stress relief treatment is conducted, specifically, the obtained part is heated to 370-390 DEG C, heat preservation is conducted, and the slow cooling speed is 0.2-0.5 DEG C / min; semi-finishing is conducted, specifically, the part is subjected to semi-finishing, allowance is reserved on a single side according to the finishing size, and the semi-finishing comprises the steps that the part is cut into a quadrant shape, finish milling is conducted, then the quadrant-shaped part is assembled into a whole circle, and semi-finish turning is conducted; detecting: detecting the size and the form and position precision of the quarter-circle-shaped part in a three-coordinate manner; and finish machining is conducted, specifically, the part is subjected to finish milling and finish turning according to the design size and form and position precision requirements, and the labyrinth seal is obtained. The brand-new process scheme is provided, and labyrinth seal deformation is effectively prevented.

The invention relates to the technical field of speed reducers, in particular to a special speed reducer for tire machinery, which comprises a box body, output shafts, flow guide assemblies and labyrinth seal assemblies, the output shafts are horizontally arranged on both sides of the box body, and the flow guide assemblies sleeve both sides of the box body and are positioned on the peripheries of the output shafts; a flow guide cover is vertically arranged on one side of the flow guide assembly, the flow guide cover is connected with the two sides of the box body through bolts, and a labyrinth sealing assembly is arranged in the flow guide cover and located on the periphery of the output shaft in a sleeved mode. By additionally arranging the directional lubricating mechanism, in the working process of tire machinery, the speed reducer synchronously utilizes rotating, flow guiding and spraying modes to conduct auxiliary lubricating on a worm and gear meshing area, meanwhile, positive pressure air sealing is combined, the sealing effect of the speed reducer can be improved, external dust entering a lubricating system inside the speed reducer is reduced, and the service life of the speed reducer is prolonged. The lifting device is suitable for driving a working platform to lift in tire machinery, thereby improving the use effect.

A compressor is provided for use in domestic appliances. The compressor includes: an impeller including an inlet, an outlet, a hub defining a rotational axis of the impeller, a plurality of impeller blades that extend from the hub, and a shroud that at least partially surrounds the impeller blades; a housing that at least partially surrounds the shroud and that is coaxially arranged with respect to the rotational axis of the impeller to allow the impeller to rotate within the housing; a leakage flow path defined between the shroud and the housing leading from a leakage flow path inlet to a reinjection port, and a labyrinth seal arrangement provided in the leakage flow path. The labyrinth seal arrangement includes one or more shroud rings interdigitated with one or more housing rings so as to form a tortuous flow path for fluid flowing through the leakage flow path.

The invention concerns a sealing system for a steam turbine, consisting of at least one labyrinth seal, the labyrinth seal comprising at least one seal housing (1) with a couple of grooves (2) and a rotor with a couple of sealing tips, wherein the sealing tips engages in the grooves (2). The sealing house (1) contains a drainage system (3) with allows liquid in the grooves (2) to dissipate.

An enclosure is provided with a first area and a second area, wherein the enclosure has an outer opening to the first area, an intermediate opening or a labyrinth seal is formed between the first area and the second area, and wherein the outer opening has a larger cross-section than the intermediate opening in the case of the intermediate opening.

The invention belongs to the field of mining mechanical equipment, and particularly relates to a vibration exciter of a coal washing vibrating screen, in particular to a sealing seat of a rotating shaft, a sealing assembly, a rotating shaft lubricating assembly and a vibration exciter comprising the rotating shaft lubricating assembly. The sealing seat is provided with a first-stage seal formed by a curved-surface vortex blocking groove, a second-stage seal used for nesting a flexible sealing piece and a through groove used for forming a labyrinth seal, the sealing seat with a three-stage sealing structure forms the sealing assembly, and the rotating shaft lubricating assembly and the vibration exciter are integrated with the assembly, so that the sealing performance can be remarkably improved; and the service life of the vibration exciter is prolonged.

The utility model relates to the technical field of precious metal smelting, in particular to a mounting structure for a driving part of a driving roller of a pressurized copper material removal banded extruder. The transmission mechanism comprises a main shaft, a mounted bearing, a chain wheel thrust ring, a chain wheel, a mounting seat, a gear, a labyrinth seal and a driving roller are sequentially mounted on the main shaft in a penetrating manner from left to right, the mounting seat is of an annular structure with a middle protrusion, the middle protrusion penetrates through the chain wheel, and the chain wheel is fixedly mounted on the mounting seat through a pin bolt and a pin nut. And a chain wheel thrust ring is arranged at the end part of the chain wheel, is fixed with the chain wheel through a bolt, and is movably connected with the mounting seat through a clamping groove. According to the installation structure, when overload torque is input into the chain wheel or a hard object is clamped between the driving roller and the driven roller meshed with the driving roller, the pin bolt is cut off, and therefore the spindle head of the spindle is protected against deformation. The utility model provides the structure which is easy to install, convenient to maintain, simple in structure and low in cost, and ensures that the pressurized copper material removal extruder stably runs for a long period.

The invention relates to the technical field of fluid conveying, and discloses a high-sealing-performance rotary joint and a preparation technology thereof.The rotary joint comprises a rotary joint body I and a rotary joint body II which is rotatably arranged, and a leakage early warning structure is arranged on the rotary joint body I; the structure comprises an early warning channel, a liquid accumulation groove used for collecting a trace amount of leaked fluid and an observation window installed outside. A two-way labyrinth type sealing structure is arranged on the outer side of the thrust ball bearing, so that the environmental adaptability is improved; according to the manufacturing technology, after assembly is completed through a low-temperature stress-free method, in-situ final machining is conducted on the device under the dynamic standard, specifically, a thrust ball bearing of the device serves as the dynamic standard to drive the rotating joint body II to rotate, and final micromachining is conducted on the dynamic sealing face. According to the invention, the assembly accumulative error is fundamentally eliminated, the dynamic sealing surface with ultrahigh geometric accuracy is obtained, the sealing performance and the operation safety of the rotary joint are obviously improved, and the service life of the rotary joint is obviously prolonged.

An enclosure is provided with a first area and a second area, wherein the enclosure has an outer opening to the first area, an intermediate opening or a labyrinth seal is formed between the first area and the second area, and wherein the outer opening has a larger cross-section than the intermediate opening in the case of the intermediate opening.

The application discloses a three-form bidirectional sealing structure, relates to the technical field of sealing, and solves the problems that in the prior art, the two sides of sealing are different media, the two sides of media are prohibited from being mixed, if the media are connected in series, the product performance is affected, under high-temperature weather conditions, there is thermal expansion phenomenon, under rain and snow weather conditions, external liquid flows into the product, and under bad environment, wind sand and dust invade, which can cause adverse effects on the product, and the specific scheme is as follows: a three-form bidirectional sealing structure, comprising a shaft and an end cover, the end cover is arranged on the circumferential side of the shaft, a sealing ring is arranged between the end cover and the shaft, a felt is arranged between the end cover and the sealing ring, the sealing ring body extends in the axial direction to form a medium sealing ring on the two side surfaces of the end cover, a plurality of protrusions are arranged on the medium sealing ring, a plurality of recesses are arranged in parallel at the positions corresponding to the protrusions of the end cover, and the recesses and the protrusions are in clearance fit to form a labyrinth seal and a non-contact clearance seal.

The present invention discloses a water-cooled, sealed permanent magnet coupler. The permanent magnet coupler includes a housing, an input-side partition plate and an output-side partition plate disposed therein. The housing is separated by the input-side partition plate and the output-side partition plate into an input-side oil chamber, a rotating assembly water chamber, and an output-side oil chamber. An input shaft and an output shaft are axially mounted within the housing, a rotating assembly and a speed regulating assembly are sequentially disposed at the front end of the output shaft. An input-side sealing structure is disposed between the input-side partition plate and the rotating assembly, and an output-side sealing structure is disposed between the rotating assembly and the output-side partition plate. Even after wear and aging of the sealing rings, the present invention prevents oil-water cross-cavity leakage due to the design of the two labyrinth seal structures, thereby extending the service life of each bearing. Lubricating oil loss is also reduced, preventing the lubricating oil from deteriorating due to water ingress, and extending the overhaul period of the permanent magnet coupler.

The invention relates to the technical field of molten iron, and provides a molten iron stirring device which comprises a bottom plate, a stirring barrel is fixedly connected to the top end of the bottom plate, a second supporting frame is fixedly connected to the top end of the stirring barrel, a power assembly is installed at the top end of the second supporting frame, and an injection assembly is installed on the portion, close to the bottom end, of the stirring barrel. A sealing assembly is installed at the center of the bottom wall of an inner cavity of the stirring barrel, a first supporting frame is fixedly connected to the top end of the bottom plate and located on the outer side of the stirring barrel, a conveying assembly is installed at the top end of the first supporting frame, a gear drives a supporting plate to rotate under limitation of the supporting plate, and the supporting plate drives stirring blades to rotate through stirring rods. And the stirring rod drives the movable ring to rotate on the supporting ring, the first gear ring and the second gear ring are designed in a staggered mode to form labyrinth sealing, and meanwhile the first gear ring rotates in the static ring. By means of the technical scheme, the technical problem that in the related technology, the efficiency is low when molten iron is desulfurized is solved.

The present invention discloses a water-proof vertical chemical slurry pump transmission assembly, comprising a pump shaft, a bearing bushing, a bearing, a bearing housing, a bearing gland, and a locking nut; the locking nut comprises an annular retaining groove on the lower plate surface of an annular connecting plate and a plug-in structure of a positioning ring on the upper end of the bearing bushing and the upper plate surface of the bearing gland, so that a structure similar to a labyrinth seal is formed therein; at the same time, a skeleton oil seal is provided between the bearing bushing and the bearing gland to further improve the sealing effect; an O-ring is provided between the compression positioning surface of the lower plate surface of the bearing gland and the front end portion of the bearing housing, so that rainwater at the bearing housing will not penetrate into the bearing housing along the compression positioning surface of the bearing housing; at the same time, an annular drainage groove and a radial drainage hole are provided on the compression positioning surface of the bearing housing, which are connected to a small hole outside, and some accumulated rainwater can flow out through this hole. Through the mutual cooperation of the above components, a complete sealing structure is formed to prevent water from entering the bearing housing.

The invention relates to a method for producing a labyrinth seal (1) for sealing a sealing region (2) between a rotor and a stator of a rotating machine, in which method a seal carrier (8) and a sealing element (3) are produced, the sealing element (3) having a convex sealing ring (4) which is arranged opposite the rotor surface, the sealing element (3) and the seal carrier (8) are connected to one another in a form-fitting manner.

The invention provides a stator tooth labyrinth seal design gap determination method, a compressor and a PDH device. The method comprises the steps that the numerical range of an inter-stage seal gap is selected; an interstage minimum sealing gap allowable value is obtained; the amplitude of the interstage sealing position is obtained; on the basis of the interstage minimum sealing gap allowable value and the amplitude of the interstage sealing position, whether the numerical range of the interstage sealing gap meets the requirement or not is verified; selecting a numerical range of an impeller wear ring sealing gap; obtaining an allowable value of the minimum sealing gap of the impeller wear ring; the amplitude of the impeller wear ring sealing position is obtained; the radial deformation of the impeller wear ring sealing position is obtained; and based on the allowable value of the minimum sealing gap of the impeller wear-ring, the amplitude of the sealing position of the impeller wear-ring and the radial deformation of the sealing position of the impeller wear-ring, verifying whether the numerical range of the sealing gap of the impeller wear-ring meets the requirement or not. A stator tooth labyrinth seal design gap can be accurately determined, and faults of a rotor and a stator are avoided; and meanwhile, the pneumatic efficiency of the compressor is ensured.