574 results about "Face seal" patented technology

The invention belongs to the technical field of oil injection ring sealing ring assembly, particularly relates to an oil injection ring sealing ring assembly line, and solves the problems of low automation degree and low assembly detection efficiency. The oil injection ring and sealing ring assembly line comprises a rack, and the rack is sequentially provided with a pre-assembly detection mechanism used for inputting an oil injection ring to be processed and carrying out hole penetration detection and size detection on the oil injection ring; the radial sealing ring assembling mechanism is used for assembling a radial sealing ring on the oil injection ring and turning over the oil injection ring after the oil injection ring is assembled; the end face sealing ring assembling mechanism is used for assembling an end face sealing ring on the turned oil injection ring; the pressure change detection mechanism is used for carrying out pressure change test on the assembled oil injection ring; the transferring mechanism is used for transferring the oil injection rings among the mechanisms; all the mechanisms are connected with a control computer, and the control computer analyzes detection data and controls coordinated actions of all the mechanisms. The function of automatically assembling the sealing ring on the oil injection ring is achieved, the assembling efficiency is high, and the finished product quality is high.

The invention belongs to the technical field of oil injection ring sealing ring assembly, particularly relates to an end face sealing ring assembly mechanism of an oil injection ring sealing ring assembly line, and solves the problems of low automation degree and low assembly efficiency. The end face sealing ring assembly mechanism of the oil injection ring sealing ring assembly line comprises a rack, an oil injection ring carrying table is slidably connected to the rack, and the oil injection ring carrying table can move between a material receiving station and an assembly station used for end face sealing ring assembly; a sealing ring transfer table and a sealing ring stacking module are further arranged on the rack, and a sealing ring transfer structure is arranged between the sealing ring transfer table and the sealing ring stacking module and used for transferring end face sealing rings of the sealing ring stacking module to the sealing ring transfer table; a sealing ring moving and mounting structure is arranged between the sealing ring transfer table and the oil injection ring carrying table and used for picking the end face sealing ring of the sealing ring transfer table and pushing the end face sealing ring downwards into an end face sealing groove in the upper end of the oil injection ring. And the effect of high automation of assembly of the end face sealing ring and the oil injection ring is achieved.

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

The invention provides a swing type hydraulic actuator, relates to the field of swing hydraulic cylinders, and aims to solve the problem that a sealing structure of an existing swing hydraulic cylinder is poor in sealing performance and durability. Wedge-shaped surfaces of the end face sealing ring and the axial combined sealing ring are used for performing preliminary pre-tightening on the two kinds of sealing; meanwhile, the annular tensioning oil cavity is formed in the end cover, the pressure of the annular tensioning oil cavity is adjusted according to the working environment requirement, the end cover deforms to act on the end face sealing ring and the axial combined sealing ring, secondary pre-tensioning is provided for the end face sealing ring and the axial combined sealing ring, and the environmental adaptability of the blade type swing oil cylinder is improved.

The present invention discloses a sealing device of a rotary kiln and a rotary kiln, the sealing device comprises a moving ring and a stationary ring arranged between a cylinder and a kiln cover, the two are in contact with each other and rotate relatively to form a spherical-conical end face sealing pair, the moving ring is fixed on the cylinder on the side away from the stationary ring, the stationary ring is elastically and sealedly connected to the kiln cover through a compensator, and the stationary ring is connected to an axial force component on the circular ring end face close to the kiln cover. The rotary kiln comprises the above-mentioned sealing device. The sealing device of the present invention, under the joint action of the moving ring, the stationary ring, the compensator, the rotating pair, the sliding pair and the axial force component, can realize the continuous and effective sealing of the cylinder and the kiln cover of the rotary kiln, has the advantages of simple structure, convenient use, good adaptability, high reliability, good sealing effect, long service life, etc., can be widely used in equipment such as rotary kilns, and has important promoting significance for effectively improving the sealing effect of rotary kilns and promoting the widespread use of rotary kilns.

A hydraulically supported seal including a seal plate operatively coupled with a seal, the seal being supported by a seal carrier within a housing; a piston having a piston shaft, the piston being in operative communication with the seal opposite the seal plate, the piston shaft being disposed through the housing through a piston receiver formed in the housing; a cylinder operatively coupled to the piston opposite the seal; and wherein the piston is hydraulically biased by a hydraulic fluid within the cylinder.

Heat exchangers and methods of making heat exchangers are discussed herein. The heat exchangers are unique in that they comprise a plurality of heat exchanger cores mechanically coupled to a structural frame that may be comprised by a distribution header to form an array of heat exchanger cores. In preferred embodiments, each core has one or more mounting interfaces that includes at least one input port and output port and is coupled to the distribution header in a removeable configuration via a face seal. In preferred embodiments, the heat exchanger cores are cantilevered from the structural support or distribution header.

The invention discloses a mechanical sealing structure with a double-face sealing effect, and particularly relates to the technical field of mechanical bearing sealing, the mechanical sealing structure comprises a sealing self-compensation mechanism, the sealing self-compensation mechanism comprises a movable shaft ring, a plurality of movable folding strips, a compensation embedded ring and a movable sealing ring, one end of each movable folding strip is fixedly connected to one end face of the movable shaft ring, and the other end of each movable folding strip is fixedly connected to the other end face of the movable shaft ring; the other end part of each movable folding strip is fixedly connected with a compensation embedded ring; the movable sealing ring is fixedly located on one side of the compensation embedded ring. By means of the sealing self-compensation mechanism, automatic compensation of the movable sealing ring and the static sealing ring is achieved through temperature, the sealing influence of thermal expansion and cold contraction caused by temperature changes is effectively dealt with, and the double-face sealing durability of the mechanical bearing is greatly improved; therefore, the problems that automatic adjustment is difficult to avoid excessive extrusion during high-temperature expansion and automatic fitting is difficult to maintain sealing during low-temperature shrinkage, and then the durability of double-sided sealing of the mechanical bearing is poor are solved.

The utility model discloses a commercial concrete stirring device which is characterized in that four rotating wheels are fixedly connected to the lower end face of a material conveying barrel, a supporting frame is fixedly connected to the surface of a stirring tank body, four supporting columns are fixedly connected to the surface of the supporting frame, and a sealing cover is connected to the upper end face of the stirring tank body in a sealing mode; the upper end face of the sealing cover is fixedly connected with a hinge, the surface of the hinge is connected with an observation cover through a hinge, the upper end face of the sealing cover is fixedly connected with a first servo motor, the output end of the first servo motor penetrates through the lower end face of the sealing cover and is provided with a first rotating shaft, and the surface of the first rotating shaft is fixedly connected with a plurality of stirring rods. A worker can control the first servo motor to drive the first rotating shaft to rotate and drive the scraper to rotate, and one side of the scraper is attached to the inner wall of the stirring tank body, so that concrete raw materials adhered to the inner side of the stirring tank body are scraped, the worker does not need to clean the scraped materials, and the workload of the worker is reduced.

The utility model belongs to the technical field of thermal management, and discloses a runner plate structure, a cooling system and an automobile, the runner plate structure comprises a runner plate assembly, the runner plate assembly is an injection molding element, the runner plate assembly comprises a runner plate body and a water valve body, the runner plate body is provided with a first connecting port, and the water valve body is provided with a second connecting port. The water valve body is provided with a second connecting port, and the second connecting port is communicated with the first connecting port. The water valve body and the runner plate body are integrally formed in an injection molding mode, the connection sealing performance of the water valve body and the runner plate body is improved, leakage of cooling liquid in the circulation process between the water valve body and the runner plate body is avoided, the connection between the water valve body and the runner plate body does not need a radial sealing ring, an end face sealing ring and a bolt any more, and therefore the sealing performance of the water valve body and the runner plate body is improved. Therefore, the problem of leakage of the cooling liquid caused by mismatching of the sizes of the end face sealing ring, the radial sealing ring and the bolt is avoided.

A multifunctional sealing test device for low temperature is characterized in that a to-be-tested product end face sealing assembly, a to-be-tested process end face sealing assembly and a to-be-tested leather cup sealing element are symmetrically installed on a rotor assembly and are fixed on a shell assembly, and when the three sealing elements are installed at the same time, the examination test of two product sealing elements can be completed at a time; when only the product end face sealing assembly and the process end face sealing assembly are installed, the sealing capability of the process end face sealing assembly on a gas-liquid two-phase medium is checked; when only a product end face sealing assembly and a leather cup sealing element are installed, the device is used for checking the sealing capability of the leather cup sealing element to a gas-liquid two-phase medium. When only the leather cup sealing element is mounted, the sealing capability of the leather cup sealing element on a liquid nitrogen medium is realized; when only the process end face sealing assembly is installed, the sealing capacity of the process end face sealing assembly to the liquid nitrogen medium can be achieved. According to the invention, multifunctional tests of low-temperature high-speed end face sealing of the turbine pump of the liquid rocket engine, test device process end face sealing and low-temperature packing cup sealing are realized.

A patient interface includes: a frame component (16100) that includes a connector operably attachable to a headband; a buffer component (16175) including a housing (161800) and a seal-forming structure (16200) configured to form a seal with a patient's nose and / or mouth; and an air delivery connector (16600). The buffer component and the air delivery connector are configured to be releasably connected to the frame component independently of each other. There is a static face seal and a separate static diameter seal between the air delivery connector (16600) and the frame (16100). There is a dynamic face seal and a separate dynamic diameter seal between the air delivery connector (16600) and the frame (16100). A separate claim (Figure 6) for a frame component (16100) having an upper headband connector arm (16134) includes at least one slot (6146) (Claim 17) or a flexible portion (Claim 22) to form a hinge configured and arranged to accommodate varying facial profiles.

The utility model discloses a quick connecting structure for metal pipe fittings, which relates to the technical field of metal pipe fitting connecting equipment and comprises a first connecting pipe and a second connecting pipe. The quick connecting mechanism is arranged on the outer side of the first connecting pipe and the outer side of the second connecting pipe; according to the utility model, one-key quick connection is realized through the insertion matching of the connecting insertion plate and the connecting insertion groove and the mechanical locking design that the round head jacking column is automatically clamped into the positioning hole under the driving of the spring, and the threaded matching of the locking ring and the second connecting sleeve further limits the displacement of the round head jacking column, so that the mounting efficiency and reliability are obviously improved; in a connection state, the two groups of sealing rubber plugs are separated from the fixed annular plate under the action of the extrusion ejection block, so that the pipeline is communicated, meanwhile, the connection sealing ring is pressed to deform to form end face sealing, double sealing of an internal channel and a connection interface is achieved, the sealing rubber plugs automatically reset to block medium flow during separation, and the leakage risk after disassembly is effectively prevented.

The invention discloses a method for judging abnormal abrasion of an end face seal and a computer program product, and belongs to the field of abnormal sealing monitoring. A plurality of monitoring values such as the end face sealing compression amount, a temperature monitoring point, a leakage amount monitoring point and a pressure monitoring point in the end face sealing test system are used as characteristic values, the collected temperature parameter rising rate is used as a basis, and the fluctuation conditions of signals of the end face sealing compression amount, the leakage amount monitoring point and the pressure monitoring point are considered; according to the method, the current temperature rising condition is corrected, finally the current temperature rising condition is compared with a preset temperature rising speed threshold value for judgment, multiple analysis and judgment are conducted, the accuracy of temperature anomaly judgment is improved, and meanwhile the method is based on an infrared end face sealing measurement test device, and the accuracy of sealing face temperature rise measurement is improved.

The present invention discloses an end face sealing structure and a turbine machinery, belonging to the field of turbine machinery, an end face sealing structure comprises: a rotor, a first groove and a plurality of second grooves that are interconnected are provided in the rotor, a convex portion is provided between adjacent second grooves, and the convex portion is connected to the rotor; a plurality of stationary blades, one end of the stationary blade is located in the first groove; a plurality of sealing teeth, one end of the sealing tooth is plugged into one end of the stationary blade, the sealing tooth extends along the axial direction of the rotor, and the other end of the sealing tooth is arranged corresponding to the second groove; a gap is formed between the convex portion and the other end of the sealing tooth. The technical effect of the present invention is that it is not only convenient to reduce the cross-coupling stiffness of the fluid in the gap, but also convenient to ensure good sealing performance under the premise of preventing collision and wear.

A filter cartridge can include a media pack including media extending between a first end and a second end along a longitudinal axis; an end cap secured to the media and including: a seal member presenting a radially inward or outward facing seal surface, the seal member being formed from a first material; and a support structure including a base part and a plurality of spaced apart, radially flexible extensions, the support structure being formed from a second material harder and / or stiffer than the first material. At least a portion of the base part is covered by and / or embedded within the first material, and the plurality of flexible extensions includes an exposed portion that is uncovered by and / or embedded within the first material and defines an axial end of the filter cartridge and is coincident with a radial innermost portion of the end cap. The seal surface and the exposed portion of the flexible extensions are axially aligned such that a plane orthogonal to the longitudinal axis can pass through the seal member and through the exposed portion of the plurality of flexible extensions.

The invention relates to the technical field of sealing performance detection devices, in particular to an intensive end face sealing testing device and a testing method.The intensive end face sealing testing device comprises a base body, medium liquid can pass through a medium liquid channel, set pressure intensity can be achieved, and therefore the sealing performance of a sealing assembly can be tested. The sealing performance and the service life of the sealing assembly can be ensured to be clear before a product is installed on the sealing assembly, the quality reliability of the product is improved, meanwhile, the sealing assembly of various specifications can be tested only by replacing the cover plate of the tool, intensive end face sealing testing is achieved, the confidence coefficient of a testing result is improved, the reuse rate of the tool is improved, and the cost is reduced. The test period is accelerated, the test cost is reduced, and the test efficiency is greatly improved.

The utility model discloses an end face sealing test device, which comprises a test joint, a slot for inserting a gas cylinder interface is arranged in the test joint, a step groove is arranged at the inner side end part of the slot far away from a gas cylinder, a first sealing ring is filled between the step groove and the gas cylinder interface, and a second sealing ring is filled between the first sealing ring and the gas cylinder interface. The end portion, close to the gas cylinder, of the inserting groove is turned outwards to form an arc surface which is attached to the surface of a gas cylinder connector, and a second sealing ring is filled between the arc surface and the gas cylinder connector. Through the design of the test joint, the slot, the stepped groove, the first sealing ring, the arc surface, the second sealing ring, the test connecting ring, the locking assembly and other parts, efficient sealing of the gas cylinder interface is realized, the sealing performance is improved, the reliability and the stability in the test process are ensured, the test is carried out in a double-sealing mode, and the test efficiency is improved. Different from conventional air tightness test equipment, it is ensured that no air leakage phenomenon exists at the interface in a high-pressure environment, and the accuracy of a test result is improved.

The invention discloses a liquid rocket engine turbine pump combined seal test device and system, which combines high-pressure low-temperature end face sealing and normal-temperature circumferential segmented sealing together, and adds a nozzle on a gas medium supply system for throttling and pressure reduction before segmented sealing and simulation of a real airflow state. The real working conditions of low-temperature and high-pressure end face sealing and normal-temperature circumferential segmented sealing of a liquid rocket engine turbine pump in a low-temperature and normal-temperature mixed medium can be simulated, the real working conditions of different sealing pressures can be simulated, and meanwhile multiple dynamic sealing products can be completed at a time. And reliable test data support is provided for the development of the engine while the test efficiency is improved.

A liquid inlet pipe is arranged on a bottom plate of a bottom supporting groove, a lower sealing plate is installed in the bottom supporting groove, an anode main body and a workpiece copper pipe are assembled on the lower sealing plate, a liquid inlet hole is formed in the lower sealing plate between the anode main body and the workpiece copper pipe, the liquid inlet pipe is communicated with the liquid inlet hole, and the liquid inlet pipe is communicated with the liquid inlet hole. The liquid return box body is a sealed box body with an opening in the bottom surface, an upper sealing plate is mounted on the opening end surface of the liquid return box body, the top of the liquid return box body is mounted on the support frame main body through a group of lifting cylinders, and a circulating liquid outlet of the upper sealing plate is in sealed butt joint with the upper end surface of a workpiece copper pipe due to the maximum descending stroke of the lifting cylinders; the anode wiring mechanism is used for being connected with an anode main body located in the liquid return box body and assembled on the liquid return box body, and the cathode wiring mechanism is used for being connected with a workpiece copper pipe and assembled on the supporting frame main body. According to the utility model, a plating solution forms a fluid between the workpiece copper pipe and the anode main body, and the plating solution is rapidly deposited and electroplated under the action of a strong electric field.

The utility model provides a clamp type grain surface sealing device. The clamp type grain surface sealing device mainly comprises a base and an extrusion component, and a pincerlike structure is formed through the hinge. The jaw can stably clamp an operated object (a U-shaped groove, a hose and a film). By pinching and pressing the handle, the extrusion part of the jaw can extrude the hose, and the hose and the film are pressed into the U-shaped groove together, so that sealing operation is realized. When the handle is released, the handle and the extrusion component automatically reset under the elastic action of the spring. And when the device is moved to the next position, the sealing operation can be continued. Automatic processing of the grain surface sealing process is achieved, operation is easy, and the working efficiency is effectively improved; the extrusion effect on the thin film and the hose can be reduced, and the service life of related facilities is prolonged; and the safety is good, and hands of operators can be prevented from being hurt in the construction process.

The invention relates to leakage testing equipment with an internal expansion seal. The leakage testing equipment comprises a testing machine; a test platform; a test rack; the supporting jig is used for placing a to-be-tested product; front and rear hole plugging assemblies; an upper plugging assembly; the inflation assembly inflates the interior of the to-be-tested product from a through hole in the side wall of the to-be-tested product; a side plugging assembly; and the front and rear hole plugging assembly, the upper plugging assembly, the inflation assembly, the side surface plugging assembly and the supporting jig are matched to form internal sealing of the to-be-tested product. According to the leakage test equipment with the internal expansion seal, in the leakage test process, end face sealing, inner hole sealing and end face sealing are achieved, a product is sealed, and a workpiece is not crushed. The inner hole sealing tool can accurately enter the inner hole of the product, keeps consistency and stability, does not scratch the workpiece, is suitable for batch automatic production, accurately meets process requirements, and carries out leakage test on the product.

The utility model belongs to tank body plugging technical field discloses a kind of tank body end face plugging device, including fixed subassembly, sealing assembly and locking assembly, fixed subassembly includes fixed band and at least two positioning locks, two positioning locks are respectively abutted in the opposite sides of the radial direction of the cylindrical outer lateral wall of tank body, fixed band is encircled in the circumferential of the cylindrical outer lateral wall of tank body and passes through positioning lock;Sealing assembly includes sealing band and flexible sealing block, sealing band is respectively connected with two positioning locks, flexible sealing block is connected on sealing band, and the side surface of flexible sealing block covers the leakage point on the end face of tank body;Locking assembly is provided with two groups, and fixed band and sealing band are respectively connected with a group of locking assembly, so that locking assembly is tensioned to make positioning lock abut tightly cylindrical outer lateral wall, and locking assembly is tensioned to make sealing band drive flexible sealing block plugging leakage point.The device structure is simple, easy to operate, and can effectively realize the plugging of tank body end face.

The application discloses a pipe end face sealing equipment, which comprises a sealing unit, and the sealing unit comprises a pipe end face cutting device, a pipe end face forming device and a visual detection device. The pipe end face cutting device is used for cutting the pipe end face. The pipe end face forming device is used for heating and forming the pipe end face after being cut by the pipe end face cutting device, so as to seal the pipe end face. The visual detection device is used for acquiring image information of the pipe end face after being cut by the pipe end face cutting device and / or acquiring image information of the pipe end face after being heated and formed by the pipe end face forming device. The pipe end face sealing equipment can be seamlessly connected with a preceding cutting machine, can automatically convey the pipe for processing, can improve the processing efficiency, and can acquire the pipe end face image information through the visual detection device, so that whether the forming is successful can be known, and remedial measures can be taken, and the shaping effect is improved.

The utility model discloses an ultrahigh-pressure blowout preventer side door sealing device which comprises a side door sealing assembly installed between a blowout preventer shell and a side door assembly, and side end face sealing rings and end-end sealing rings are arranged on the side contact faces of the side door sealing assembly and the blowout preventer shell and the side contact faces of the side door sealing assembly and the side door assembly. The side door sealing assembly is arranged between the blowout preventer shell and the side door assembly, the side door sealing assembly is provided with the side end face sealing ring and the end sealing ring, the side door assembly can extrude the side door sealing assembly under the action of pre-tightening force of a side door bolt, the side door sealing assembly is tightly attached to the blowout preventer shell, and under the action of internal pressure of a blowout preventer, the side door sealing assembly can be tightly attached to the blowout preventer shell. The end face sealing rings extrude outwards, the side end face sealing rings and the end sealing rings form two sealing barriers, mutual complementation is formed, sealing is reliable, and long-term sealing can be guaranteed through the two seals.

The invention relates to the technical field of aqueduct construction, and particularly discloses an anti-permeation sealing assembly for connecting a prefabricated aqueduct body, the anti-permeation sealing assembly comprises a backwater sealing strip part, a water retaining strip part, an upstream sealing strip part and a pressing strip part, the backwater sealing strip part is arranged on the backwater surface of the water retaining strip part; the upstream sealing strip part is arranged on the upstream face of the water retaining strip part; the pressing strip component is arranged on the face, away from the water retaining strip component, of the water facing sealing strip component and used for pressing the water facing sealing strip component on the water facing face of the water retaining strip component, and the pressing strip component can push the first side edge of the water facing sealing strip component in the direction away from the first side edge of the water retaining strip component. The pressing strip component can push the second side edge of the upstream sealing strip component in the direction away from the second side edge of the water retaining strip component. According to the aqueduct, the sealing effect of the aqueduct seam can be improved.

The present invention relates to the technical field of thermal fluid devices, and specifically to a four-sided visual sight tube assembly. It includes an upper fastening flange, a lower fastening flange and a visual tube. The upper fastening flange is connected to the lower fastening flange by screws and nuts. There are three groups of connecting screws and nuts, which are symmetrically distributed in the middle position of the fastening flange to compress and fasten the visual tube; the two ends of the visual tube are respectively placed in the grooves of the upper and lower fastening flanges, and an upper sealing gasket and a lower sealing gasket are respectively provided between the visual tube and the fastening flange, and the sealing adopts end face sealing. The present invention has a compact structure, low cost, and is easy to replace; it is convenient for the external joint of the connecting assembly to be directly connected when the visual sight tube assembly fails; it can observe the flow state of the fluid in the tube from a full angle, and the state in the tube is more determined by installing a float with a guide rail. The float with a guide rail avoids the impact of the float on the peep tube, thereby improving the service life and safety of the pipe fittings.

The invention discloses a high-speed end face sealing testing device and a testing method thereof. The high-speed end face sealing testing device comprises a machine base, a driving system installed on the machine base, a load simulation system, a medium system, a multi-physics field coupling system, a high-precision measuring system and a data collecting and processing system. Meanwhile, the tested sealing element is installed in the testing cavity, a moving ring part of the tested sealing element is connected with an output shaft of the driving system, and a static ring part of the tested sealing element is installed on an end cover of the testing cavity. By integrating the driving system, the load simulation system, the medium system and the multi-physical-field coupling system, extreme working conditions from a steady state to a transient state, from a normal temperature to cryogenic / high temperature and from a single load to multi-field coupling can be simulated, and full-spectrum working conditions of high-end equipment such as an aero-engine and the like are covered.

The utility model relates to the technical field of pharmaceutical equipment, and discloses a sealing, scraping and guiding combined device and a dry type granulator, the sealing, scraping and guiding combined device comprises: an end face sealing device, which encloses a pre-pressing space, a main compaction space and a discharge space with the outer peripheral surfaces of a first compression roller and a second compression roller; the scraping and guiding device comprises a first scraper and a second scraper, the first scraper and the second scraper are suitable for shoveling, scraping and removing materials adhered to the peripheral surfaces of the first compression roller and the second compression roller, a guiding space is formed between the first scraper and the second scraper, and an outlet of the guiding space is communicated with an inlet of the granulating cavity. According to the sealing, scraping and guiding combined device provided by the utility model, the first scraper and the second scraper are arranged to scrape and remove materials adhered to the peripheral surface of the compression roller, and the materials are guided to the granulating cavity through the guiding space between the first scraper and the second scraper, so that the scraping and guiding device integrates a material scraping function and a material guiding function; therefore, the structure of the sealing scraper combination device is more compact, and the requirement for small and exquisite appearance of equipment is met.

The present invention discloses a rotary sealing assembly and a central waterway system for a shearer. The rotary sealing assembly includes a sealing seat and a rotary sleeve. A lip-type rotary seal is provided between the sealing seat and the rotary sleeve. A first leakage hole is formed in the sealing seat. A spring support seat is sleeved outside the rotary sleeve. One end of the spring support seat is provided with a plurality of corrugated springs. A dynamic seal mounting ring is sleeved outside the spring support seat. A dynamic seal ring is installed in the dynamic seal mounting ring. A static seal ring is arranged on one side of the dynamic seal ring. An end face seal pair is formed between the dynamic seal ring and the static seal ring. The central waterway system includes a rotary sealing assembly, a water inlet seat, a water outlet seat, and a central water pipe connected between the rotary sealing assembly and the water outlet seat. The present invention adopts the combination form of end face seal and radial seal, and the combination form of the central water pipe and the rotary sleeve, solves the problem of premature failure of the central water pipe and the sealing assembly in the central waterway of the prior art, and improves the spray dust reduction effect of the coal mining face.