530 results about "Labyrinth seal" patented technology

The invention belongs to the technical field of gearbox shaft end sealing, and particularly relates to a motor vehicle shaft end double-blade sealing device and a shaft end sealing design method.The method comprises the following steps that S1, working condition parameters are determined; s2, designing a double-blade impeller; s3, designing a sealing structure; and S4, outputting a design result. The sealing effect is good, the double-blade impeller and the staggered labyrinth seal are combined, and the sealing performance of the shaft end of the gearbox is effectively improved; the operation and maintenance cost is reduced, and the operation and maintenance interval can be effectively prolonged and the operation and maintenance investment is reduced; the reliability is high, a non-contact sealing mode is adopted completely, and the reliability of the double-blade impeller structure is high; and the design and three-dimensional modeling work of the shaft end sealing device can be automatically completed according to the determined environmental parameters and boundary dimension requirements, and a user can complete the design adjustment work of the shaft end sealing device through one key based on reliability redundancy.

The present disclosure relates to a sealing arrangement (1) for a bearing, comprising a first sealing element (2), which is connectable to a bearing inner ring of the bearing, a second sealing element (3), which is connectable to a bearing outer ring of the bearing, and a sealing gap (4) formed between the first sealing element and the second sealing element, wherein the sealing gap is formed as a stepped labyrinth seal (5). The disclosure also relates to a bearing arrangement having a sealing arrangement of this kind.

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 high-temperature fan of the granulating and drying hot-blast stove relates to the technical field of compound fertilizer processing and production and comprises a base, a bearing support is fixed to the rear end of the base, a main shaft is rotationally installed in the middle of the bearing support, a main umbrella wheel is coaxially arranged at the input end of the main shaft, and trapezoidal fins are fixed to the position, close to the main umbrella wheel, of the rear end of the main shaft; the spindle is sleeved with a shaft sleeve, and a labyrinth seal is arranged at the front end of the shaft sleeve. In the using process, only one motor needs to be arranged, energy is supplied to the high-temperature fan, meanwhile, automatic circulation of cooling water is achieved through linkage driving of the circulation assembly, heat exchange cooling is conducted on the circulating cooling water through the cooling fan, and due to the fact that compressor refrigeration and water pump circulation do not need to be used, the cooling efficiency is greatly improved. Therefore, efficient circulating cooling of the cooling water can be achieved with a simple structure and extremely low cost, the problem of abrasion between parts of the fan caused by high-temperature expansion is solved, and heat transmitted to the bearing from a high-temperature medium is effectively controlled.

The utility model belongs to the technical field of cutting arms, and particularly relates to an impact-resistant cutting arm for a hard rock heading machine. Comprising a cantilever cylinder; the cutting main shaft is installed in the cantilever cylinder, a self-aligning roller bearing, a thrust bearing and a cylindrical roller bearing are sequentially arranged between the cutting main shaft and the cantilever cylinder from front to back, a framework oil seal II is arranged behind the cylindrical roller bearing, and a framework oil seal I is arranged in front of the self-aligning roller bearing; the front end of the cantilever cylinder is provided with a floating sealing frame sleeved on the cutting main shaft, the front end of the floating sealing frame is provided with a floating sealing seat sleeved on the cutting main shaft, the floating sealing seat is provided with a mechanical labyrinth seal, and a floating seal is arranged between the floating sealing frame and the floating sealing seat; and the cutting head is fixed at the front end of the cutting main shaft. When the cutting arm of the hard rock heading machine is used for cutting rocks of which the compressive strength is more than 70MPa, the service life of the cutting arm is prolonged.

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 belongs to the technical field of shaft sealing, in particular to a spiral sealing element for a main bearing of a wind driven generator, which is characterized in that a dustproof sealing lip and a sealing spiral lip are arranged on the inner ring surface of a sealing head and have the same inner diameter; the dustproof sealing lip is a closed full-circle lip and located on the side, close to the atmosphere side, of the inner ring face, the sealing spiral lips are spirally distributed along the inner ring face of the sealing head, and a long and narrow oil seal channel is formed between the spiral lips. According to the utility model, the long and narrow grease channel is formed by the multiple spiral sealing lips, so that the grease is subjected to labyrinth sealing in a static state, and the grease overflowing into the labyrinth is pumped back into the bearing by utilizing the rotating motion of the rotating shaft in a working state; the sealing dustproof lip is a closed full-circle lip, dust on the atmosphere side can be effectively prevented from entering the sealing lip, meanwhile, grease leaked from the grease channel can be blocked, and therefore the effects of buffering the grease and preventing the grease from entering the atmosphere side can be achieved.

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.

A sealing mechanism (1) that seals an annular gap (4) between a housing (2) and a rotation shaft (3) comprises a metal seal ring (10). A first shaft-sliding surface (15), a labyrinth-seal forming surface (16), and a second shaft-sliding surface (17) are formed on a circular inner peripheral surface (11) of the seal ring (10). The first and second shaft-sliding surfaces (15, 17) are matte surfaces having a prescribed surface roughness. A labyrinth seal is formed between the labyrinth-seal forming surface (16) and a circular outer peripheral surface (3a) of the rotation shaft (3). Making the first and second shaft-sliding surfaces (15, 17) matte surfaces makes it possible to reduce the frictional resistance with the rotation shaft (3) and to suppress wear and heat generation in the first and second shaft-sliding surfaces (15, 17). Furthermore, a sealing mechanism capable of preventing oil leakage in both axial directions can be obtained.

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 piston type shielding door, and particularly relates to the technical field of radiation shielding, the piston type shielding door comprises a door frame, and the door frame is mounted on a wall body. The upper portion of the side, facing the door frame, of the door body and the left side and the right side, close to the door frame, of the door body are concave inwards to form stepped structures, the moving direction of the door body is perpendicular to the wall, and the door frame is matched with the door body to form labyrinth seal. And the sliding device is fixedly mounted at the bottom of the door body. And the bearing device is mounted on the ground at the bottom of the door body, and the bearing device is interactively matched with the sliding device. And the driving device is fixedly installed on the side, away from the door frame, of the door body, and the driving device is used for driving the door body to move on the bearing device through the sliding device. According to the piston type shielding door, the technical problems that a shielding door is poor in shielding effect, high in construction requirement and serious in abrasion of internal parts are solved, and the piston type shielding door is complete in shielding, low in construction difficulty and long in service life.

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 discloses a labyrinth seal robustness test platform in a non-rigid rotor system, and relates to the technical field of gas turbine engines. Comprising an axial displacement mechanism, a variable stiffness system and a labyrinth element test section, the variable stiffness system is installed at the top of the axial displacement mechanism, and the labyrinth element test section is connected with the axial displacement mechanism through a main shaft connection installation plate. According to the invention, axial position adjustment and axial displacement deviation injection are realized through the axial displacement mechanism, continuous variable stiffness adjustment is realized through the variable stiffness system, the test section is used for carrying out principle tests of different comb tooth configurations, and injection of comb tooth gap deviation is realized by installing the electric heating sheet on the surface of the comb tooth disc. A test system is formed by the axial displacement, the radial clearance and the aerodynamic force, so that the test bed can be used for researching the influence of axial displacement-radial clearance-aerodynamic force coupling on the sealing performance of the labyrinth in a non-rigid rotor system and researching the response rule of axial displacement or radial clearance deviation on a sealing system.

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 invention provides a mechanical sealing structure for a waste heat removal pump, which comprises a shaft sleeve, a first spiral sleeve is mounted on the shaft sleeve, a second spiral sleeve is screwed on the first spiral sleeve to form a double-spiral structure, and a labyrinth sealing structure is arranged on the outer side of the first spiral sleeve; the second spiral sleeve is installed on a gland, and a mechanical sealing piece is installed between the shaft sleeve and the gland. The auxiliary sealing ring is not prone to aging, an elastic element is not prone to fatigue, a liquid film on the mechanical sealing end face is not prone to gasification, the sealing ring cannot be damaged due to gasification, and therefore the stability of mechanical sealing operation is guaranteed. The sealing ring is not prone to thermal deformation, so that the flatness of the end face of the sealing ring cannot be changed, and the stability of the mechanical sealing leakage rate is guaranteed.

The invention belongs to the technical field of helium fans, and particularly relates to a main helium fan of a high-temperature gas cooled reactor. The main helium fan comprises a shell, a rotating shaft is arranged in the shell, a middle flange is connected in the shell, a labyrinth sealing device is connected between the middle flange and the rotating shaft, and an inner cavity of the shell is divided into a motor cavity and a working cavity by the middle flange; the end, extending out of the working cavity, of the rotating shaft is connected with a main impeller, a machine base is fixed in a motor cavity of the shell, a lower radial electromagnetic bearing and an auxiliary bearing are connected between a lower bearing end cover and the rotating shaft, and an auxiliary bearing, a thrust electromagnetic bearing and an upper radial electromagnetic bearing are connected between an upper bearing end cover and the rotating shaft. A stator is arranged between the rotor and the base, an axial flow fan is installed at the top of the rotating shaft, a helium water cooler is installed at the upper end of the motor upper cover, and the axial flow fan is located on the lower side of the helium water cooler. According to the high-temperature gas cooled reactor primary helium fan, the motor cavity and the working cavity are effectively isolated, and the temperature rise of the motor cavity 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 invention belongs to the technical field of photoelectric monitoring, and particularly relates to a photoelectric rotary table pitching driving module which comprises a stepped shaft arranged at one end of a pitching rotating shaft of a photoelectric rotary table, and the diameters of steps of the stepped shaft are sequentially decreased from the inner end to the outer end; the stepped shaft is installed in the bearing seat, and an oil seal, a deep groove ball bearing and a pressing ring are sequentially arranged between the stepped shaft and the bearing seat from the inner end to the outer end. The bearing seat is fixedly connected with a motor stator, a motor rotor is arranged in the motor stator, and the motor rotor is installed on the stepped shaft through a rotor installation seat. According to the photoelectric turntable pitching driving module, modular design is carried out, assembling, maintaining and disassembling are convenient, meanwhile, a step labyrinth seal and oil seal contact sealing combination is used, and the water-proof, salt-resistant and sand-proof capacity of the photoelectric turntable pitching driving module is improved.

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 invention discloses an air outlet assembly and an air conditioner, and the air outlet assembly comprises an air outlet frame which is installed on a preset structure, and an air outlet is formed in the air outlet frame; the air guide plate is rotatably connected to the air outlet frame; the air guide plate is provided with a first matching structure at the rotating shaft, the air outlet frame is provided with a second matching structure corresponding to the rotating shaft of the air guide plate, and the first matching structure and the second matching structure are matched with each other to form a labyrinth sealing structure when the air guide plate opens the position of the air outlet. According to the air outlet assembly and the air conditioner, the problem that in the prior art, a matching structure of an air guide plate is prone to generating condensation is effectively solved.

The marine weather tight door comprises a door frame, a door plate and a driving assembly, the door plate is rotationally connected to the door frame, multiple sets of sealing blocks are slidably connected to the door plate, a matching groove capable of being matched with the door plate is formed in the door frame, sealing grooves capable of being matched with the multiple sets of sealing blocks are formed in the door frame, and a first abutting frame is arranged on the door frame; the driving assembly is used for driving the multiple sets of sealing blocks to slide, when the door plate rotates to abut against the first abutting frame, the door frame is matched with the matching groove, and the multiple sets of sealing blocks can be matched with the corresponding sealing grooves correspondingly. The driving assembly drives the multiple sets of sealing blocks to move, and when the multiple sets of sealing blocks are matched with the sealing grooves, the sealing performance of the weather tight door is improved through a labyrinth sealing method, and the possibility that rainwater enters a room through door cracks is reduced; and when the multiple sets of sealing blocks are matched with the corresponding sealing grooves, the position of the door plate on the door frame is limited, and the possibility that the weather tight door shakes when strong wind blows is reduced.

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.