57 results about "End face mechanical seal" patented technology

The invention discloses a bidirectional crescent upstream pumping groove end face mechanical seal which comprises a sealing ring. Different from the prior art, a plurality of upstream pumping groove groups and downstream pumping groove groups are arranged on the sealing surface of the sealing ring, the upstream pumping groove groups and the downstream pumping groove groups are alternately distributed on the sealing ring, and a sealing weir is formed between each upstream pumping groove group and the adjacent downstream pumping groove group. The crescent upstream groove structure can enable a fluid medium to be leaked from the upstream side of the downstream groove, on one hand, leakage of the fluid medium to the inner diameter side can be reduced, the sealing performance is improved, on the other hand, viscous shear heat of fluid on the sealing face can be dissipated in time, and small temperature rise of the sealing face is maintained. Meanwhile, a fluid medium can flow in a wave shape along the crescent flow channel in the adjacent upstream groove and downstream groove, a layer of stable fluid film is maintained between the sealing faces, the lubricating state of the sealing faces is improved, and temperature rise and friction torque of the sealing faces are reduced.

The application discloses a double-end-face mechanical sealing device for a sand pump, and has the technical scheme as follows: a transmission pipe is internally provided with a fixed ring, the top surface and the bottom surface of the fixed ring are respectively provided with a plurality of first springs, the top surface and the bottom surface of the fixed ring are respectively provided with two extrusion rings, the outer surface of the extrusion ring is fixedly provided with an anti-skid ring, the outer wall surface of the extrusion ring is movably connected with the inner wall surface of the transmission pipe, and the extrusion ring is fixedly connected with the first springs. Through the cooperation of the transmission pipe, the fixed ring, the first springs, the extrusion rings, the anti-skid rings, the sliding grooves, the sliding blocks, the mounting rings, the first placing rings, the first sealing rings, the second placing rings and the second sealing rings, the medium inlet and outlet of the sand pump can be sealed, and the leakage of the medium transmitted by the sand pump due to the gaps in the sealing device can be avoided.

The utility model belongs to the field of sand mill equipment, and particularly relates to a sand mill for salt-fog-resistant industrial paint production, a grinding cylinder comprises a metal outer cylinder, a wear-resistant inner container, a main shaft and a grinding rotor, a power transmission system comprises a power motor, a speed reducer and a mechanical seal, and a centrifugal discharging system comprises a discharging pipe, a discharging filter screen and a discharging end cover. The cooling system comprises a grinding cylinder cooling system, a mechanical seal cooling system and a discharging cooling system, the grinding cylinder cooling system comprises a cooling water tank, a cooling water pump and a grinding cylinder water cooling jacket, the mechanical seal cooling system comprises a mechanical seal water cooling device and a mechanical seal cooling water path, and the discharging cooling system comprises a filter screen cooling coil and a discharging end cover annular cooling water cavity. The mechanical seal adopts a double-end-face mechanical seal, the mechanical seal is installed on the base through a mechanical seal fixing seat, a feeding pipe is arranged on the fixing seat, and an electric control box is arranged in the base. According to the sand mill, the grinding efficiency and the grinding effect of paint can be improved, and the equipment failure rate and the maintenance difficulty of the sand mill can be reduced.

This utility model relates to the technical field of single-end mechanical seal structures. It provides a balance-free single-end mechanical seal structure suitable for high-pressure and high-temperature environments, comprising a stationary ring, a rotating ring, and a spring-loaded seat. The stationary and rotating rings slide tightly against each other at their opposite ends. The spring-loaded seat is pressed against the top of the rotating ring. The spring-loaded seat includes a rotating ring positioning ring and a locking ring. The rotating ring positioning ring is engaged with the lower end face of the rotating ring, and the locking ring is locked onto the shaft to be sealed and rotates with it. Elastic connecting elements are provided at four positions (front, back, left, and right) between the locking ring and the rotating ring. Four damping connecting pads are also provided between the locking ring and the rotating ring. The four damping connecting pads and the four elastic connecting elements are staggered around the center of the locking ring. This mechanical seal structure, through the organic combination of elastic connecting elements and damping connecting pads, not only improves the elastic compensation and sealing performance between the rotating and stationary rings but also effectively alleviates the impact load caused by sudden pressure changes or mechanical vibrations.

The invention discloses a double-end-face mechanical sealing device for a stirring kettle. The double-end-face mechanical sealing device comprises a first sealing assembly, a second sealing assembly, a cooling liquid shell (1) and a transmission sleeve (2). The cooling liquid shell (1) is provided with a liquid inlet (10) and a liquid outlet (11), and an annular protrusion (12) is arranged in the middle of the outer side wall of the transmission sleeve (2). A first circumferential positioning structure of the first movable ring (5), a second circumferential positioning structure of the second movable ring (8), elastic compensation structures of the first movable ring (5) and the second movable ring (6) and a fixing structure of the transmission sleeve (2) and the cooling liquid shell (1) are all integrated on the annular bulge (12); according to the device, the transmission sleeve of an integrated structure is adopted, and the elastic compensation device, moving ring positioning pins of the two sealing assemblies and a positioning mechanism of the transmission sleeve are all concentrated on the transmission sleeve.

The utility model discloses a double-end-face mechanical seal rotor pump for chemical raw materials. The double-end-face mechanical seal rotor pump comprises a rotor pump body. The symmetrically arranged shaft bodies are arranged in the rotor pump main body; the sealing block is arranged at the position, corresponding to the shaft body, in the rotor pump main body; dust-proof sleeves are symmetrically arranged at the positions, close to the sealing blocks, of the outer side of the shaft body, vertical plates are symmetrically connected to the sides, close to the dust-proof sleeves, of the rotor pump body and correspond to the dust-proof sleeves, and first springs are connected between the vertical plates and the dust-proof sleeves; after the external connection ring moves to the position attached to the vertical plate, the second positioning groove corresponds to the positioning rod, at the moment, the positioning rod is loosened, and the positioning rod is reset and clamped in the second positioning groove under the action of the arc-shaped spring, so that the dustproof sleeve is fixed at the position far away from the shaft body and the sealing block; the sealing block or the shaft body can be dismounted, maintained or replaced without rotating the screw rod all the time to enable the dustproof seat to be far away from the driving shaft, so that the working efficiency is improved.

The utility model relates to the technical field of floating oil seals, and provides a floating oil seal for end face mechanical sealing, which comprises a floating seal seat and a floating seal ring arranged in the floating seal seat, a second seal ring is arranged between the floating seal seat and the floating seal ring, and a plurality of pressure-proof pieces are arranged between the floating seal seat and the floating seal ring; the anti-pressing piece comprises a circular sliding groove formed in the floating seal ring, a rubber cushion is fixedly connected to the inner bottom wall of the circular sliding groove, a rectangular groove is formed in the floating seal seat, a circular plate is slidably arranged on the circumferential inner wall of the circular sliding groove, a connecting rod is rotationally connected to the upper end of the circular plate, and the connecting rod movably penetrates through the upper end of the floating seal ring. A rectangular plate is slidably connected between the side walls of the rectangular groove, a connecting rod movably penetrates through the inner bottom wall of the rectangular groove, the connecting rod is connected with the rectangular plate through a connecting piece, the moving distance between the floating seal seat and the floating seal ring can be limited, and therefore the effect on a second seal ring is reduced; and the service life of the second sealing ring is prolonged.

The invention discloses a single-end-face mechanical seal auxiliary system with a dry friction prevention function, and belongs to the technical field of mechanical sealing.The auxiliary system comprises a base and a support arranged on the base, the support is provided with a lubricating liquid storage tank, lubricating liquid is stored in the lubricating liquid storage tank, the top of the lubricating liquid storage tank is a cavity, and the cavity is filled with gas; the lubricating liquid storage tank is connected with a liquid supplementing pipe and an exhaust pipe, one end of the liquid supplementing pipe is located below the liquid level of lubricating liquid in the lubricating liquid storage tank, and the other end is used for being connected with a pump. One end of the exhaust pipe is connected with the pump, and the other end is communicated with the cavity of the lubricating liquid storage tank; a liquid supplementing valve is arranged on the liquid supplementing pipe, and a one-way valve is arranged on the exhaust pipe. Automatic supply, real-time state monitoring, self-adaptive control and fault diagnosis of the lubricating liquid can be achieved, the mechanical seal dry friction phenomenon is effectively avoided, and the stability and reliability of system operation are improved.

The invention discloses a miniaturized experimental high-pressure glass-lined reaction kettle which comprises a tank body and a tank cover, fixed flanges are arranged at ports of the tank body and the tank cover, and bolts penetrate through bolt via holes to fixedly connect the tank body and the tank cover; a first high-diameter flange is arranged on the tank cover, a mounting frame fixed through bolts is arranged on the first high-diameter flange, a double-end-face mechanical seal is arranged in the mounting frame, a gasket is arranged between the double-end-face mechanical seal and the first high-diameter flange, and the double-end-face mechanical seal is fixedly connected with the first high-diameter flange through bolts; a feeding hole is formed in the tank cover, and a high-diameter flange is arranged at the feeding hole; a motor is arranged on the mounting frame, a stirring assembly is arranged at the shaft end of the motor, and a discharging port is formed in the bottom of the tank body. Reagent verification can be carried out by utilizing the characteristic of small volume, and serious resource waste is avoided; meanwhile, the tank body and the tank cover are fixed more firmly and sealed more compactly through the arrangement and application of the groove in the fixed flange, and the situation that the glaze layer is damaged due to large pressure is avoided.

The utility model provides a novel dynamic seal and double-end-face seal combined high-temperature-resistant chemical pump, which relates to the technical field of chemical pumps and comprises a pump body structure, and a pump cover structure is fixedly mounted at the rear end of the pump body structure through threads. A water inlet structure is arranged at the left end of the pump body structure; the right end of the pump cover structure is fixedly connected with a sealing end cover; a mounting bearing is fixedly mounted in the sealing end cover; and a pump shaft structure is rotationally mounted in the mounting bearing. When the working impeller leaks liquid, the leaked liquid flows to the auxiliary impeller, at the moment, the pressure generated by the auxiliary impeller and the pressure of the leaked liquid can be balanced at the top end of the auxiliary impeller and the inner end face of the double-end-face mechanical sealing piece, then the sealing effect is achieved through the leaked liquid, and the problems that the working condition of the high-temperature-resistant chemical pump is complex and bad, and the sealing effect is poor are solved. And various potential problems are difficult to comprehensively and reliably deal with only depending on a single mechanical seal.

A multi-groove cooperative type end face mechanical sealing structure comprises a rotating ring and a static ring which are used for mechanical end face sealing, the rotating ring and the static ring are both provided with annular sealing end faces which are coaxially arranged, and the sealing end faces take the circle center of the sealing ring as the reference. An outer side sealing face, an annular groove and an inner side sealing face are sequentially arranged in the radial direction from the outer edge to the circle center. The outer side sealing face is provided with drainage grooves distributed in the circumferential direction, the drainage grooves penetrate through the whole outer side sealing face, the inlet ends of the drainage grooves are connected with the medium side, and the outlet ends of the drainage grooves are connected with the annular groove. When the rotating ring rotates, a medium enters the drainage groove from the inlet end of the drainage groove and then flows into the ring groove from the outlet end. Through the drainage groove, the pressure of a medium in the annular groove can be greatly improved, the medium can be effectively supplemented to the inner side sealing face, the continuity of formation of a liquid film on the inner side sealing face is ensured, and dry friction of the inner side sealing face and flash evaporation of the medium caused by too high temperature are avoided.

The invention relates to the technical field of mechanical seal cooling, in particular to a self-circulation cooling device and method for a multi-phase multiphase pump mechanical seal, and the self-circulation cooling device for the multi-phase multiphase pump mechanical seal comprises a multi-phase multiphase pump and a liquid tank. A left end face mechanical sealing mechanism and a right end face mechanical sealing mechanism are arranged at the left end and the right end of the compression bin correspondingly, a left bearing and a right bearing are arranged at the left end and the right end of the pump shaft in a surrounding and supporting mode correspondingly, and a left bearing mechanical sealing mechanism and a right bearing mechanical sealing mechanism are arranged between the left bearing and the pump shell and between the right bearing and the pump shell correspondingly. A first cooling pipeline is arranged between the liquid tank and the right end face mechanical sealing mechanism, and a second cooling pipeline is communicated between the first cooling pipeline and the left end face mechanical sealing mechanism. All mechanical sealing mechanisms of the multiphase multiphase pump can be effectively and continuously cooled, operation is safe, cost input is low, and great safety guarantee and economic benefits are brought to oil and gas gathering and transportation enterprises.

A double end face mechanical seal, including mutually matched bushings, inner flanges, inner static rings, inner dynamic rings, outer dynamic rings, outer static rings, outer flanges, fixed ring assemblies, and the formed internal cavities, further including static flushing adjusting components, the top of the inner flange is provided with a cavity, the static flushing adjusting components are screwed into the top of the inner flange through threaded cooperation, a sealed cavity is formed with the internal cavities, cooling water is filled in the sealed cavity, medium crystallization is well prevented, heat of rotating sealing pairs is absorbed, a power circulation cooling device is not needed, space occupation is small, the static flushing function can be flexibly used in narrow production environment, gas generated by continuous vaporization of cooling water due to heat generated by high-speed operation can be timely discharged, gas aggregation in the mechanical seal is avoided, and normal cooling of the mechanical seal is affected. The utility model is especially suitable for working conditions of strong corrosion, high temperature, suspended particles and fiber medium.

The utility model provides a radial double-end-face mechanical seal for a rotor pump, which comprises a moving ring and a static ring assembly which are sleeved outside a rotating shaft and are in axial sealing fit, and a transmission groove is arranged on the back of the moving ring; the static ring assembly comprises a static ring seat, a mounting groove is formed in the end, close to the movable ring, of the static ring seat in an inwards-concave mode, a main static ring and an auxiliary static ring are assembled in the mounting groove in a sliding and sealing mode in the axial direction, and the auxiliary static ring is located on the radial outer side of the main static ring. The ends, away from the mounting groove, of the main static ring and the auxiliary static ring are matched with the front face of the movable ring in a relative rotation mode so as to form a main seal and a secondary seal which are distributed inside and outside in the radial direction. Elastic compensation elements are arranged between the ends, away from the movable ring, of the main static ring and the auxiliary static ring and the bottom of the mounting groove. The radial double-end-face mechanical seal for the rotor pump is simple in structure, double in sealing, stable in sealing performance, stable in transmission and long in service life.

The double-end-face mechanical seal of the rotary shell pump comprises a gland arranged on the left side of an outer shell and a shaft sleeve installed in the middle of the gland in a penetrating mode, meanwhile, a shaft body is installed in the middle of the shaft sleeve in a penetrating mode, a spring is arranged in the gland, and a push ring is arranged at the movable end of the spring. And the spring is connected with the outer static ring through a push ring, and a positioning block is arranged at the right end of the base. According to the double-end-face mechanical seal of the rotary shell pump, through the arrangement of the sealing assembly, the overall sealing effect of the rotary shell pump is improved, double-end sealing can be achieved, leakage is prevented in the medium conveying process, when the shaft body rotates rapidly, especially when the pressure in the rotary shell pump changes, the pressure extrudes the inner movable ring at the moment, and the sealing effect of the rotary shell pump is improved. In addition, the outer movable ring and the outer static ring can extrude the spring at the same time, in combination with elastic deformation of the spring, the good buffering effect can be achieved, the pressure change can be better coped, and the service life of the whole mechanical seal is prolonged.

The utility model relates to a novel sealing cavity structure for a paper pulp pump, a sealing cavity body is composed of an impeller, a pump cover and a shaft, a replacement part is arranged in the sealing cavity, and the replacement part is one of a single-end-face mechanical seal, a double-end-face mechanical seal or a packing seal. The sealing cavity is generally designed according to packing sealing, single-end-face mechanical sealing and double-end-face mechanical sealing, interchange of multiple sealing modes can be achieved, the effect of multiple purposes is achieved, and the production cost is effectively reduced. The shaft sleeve is installed between the impeller hub and the shaft shoulder, after the impeller nut is screwed down when the pump is assembled, the impeller hub and the shaft shoulder jointly press the shaft sleeve, key connection is not needed, and therefore the shaft sleeve can be relatively thinned, the size of a sealing cavity is reduced, and cost is reduced. As key connection is not adopted, a key groove is not formed in the shaft, the strength of the shaft is ensured, and safe operation of a unit is ensured.

The invention provides a tandem type double-end-face mechanical sealing device which comprises a shell, a rotating shaft, a cooling system and an adjusting system, the rotating shaft is rotatably arranged in the shell, the shell comprises a first sealing cavity and a second sealing cavity, the first sealing cavity is communicated with a liquid storage tank, and the second sealing cavity is communicated with the liquid storage tank. The cooling system comprises a cooler arranged in the second sealing cavity, the cooler communicates with the liquid storage tank, and the partition system communicates with the second sealing cavity and is configured to be opened when the pressure in the second sealing cavity is lower than a preset value and closed when the pressure in the second sealing cavity reaches or exceeds the preset value. The adjusting system is used for adjusting the pressure of the first sealing cavity and the second sealing cavity. According to the tandem type double-end-face mechanical sealing device, reliable standby application of the second-stage seal in the low-pressure or non-pressure state is achieved, working pressure can be accurately established when needed, and therefore the redundancy and operation stability of the tandem type double-end-face mechanical sealing device are guaranteed.

A kind of high-speed grinding device of paint belongs to paint production technical field.The device aims at the problem that existing horizontal sand mill double-end face mechanical seal structure is difficult to disassemble, leading to inconvenient cleaning and maintenance, and proposes a combination scheme of sliding type grinding cylinder structure and double locking mechanism.The main body includes: sliding seat slidingly arranged on the top of base, grinding cylinder fixedly connected by support;Main shaft penetrates end cover and extends into grinding cylinder and sets multiple grinding discs;Locking mechanism is composed of threaded rod, sliding block and clamping half ring, threaded rod cooperates with threaded groove in sidewall of base, and clamping half ring on top of sliding block is sleeved on the combination of end cover and outer wall of grinding cylinder.The device combines separable cylinder structure and mechanical linkage locking mechanism, ensures grinding efficiency, realizes quick disassembly of grinding cylinder assembly, facilitates thorough cleaning of dead angle areas such as gap between rotor and cylinder, and significantly reduces equipment maintenance difficulty.

The application discloses an auxiliary system of single-end-face mechanical seal with anti-dry friction function, and belongs to the technical field of mechanical seal. The auxiliary system comprises a base and a support arranged on the base. A storage lubricating liquid tank is arranged on the support. The storage lubricating liquid tank stores lubricating liquid. The top of the storage lubricating liquid tank is a cavity, and the cavity is filled with gas. The storage lubricating liquid tank is connected with a liquid supplement pipe and an exhaust pipe. One end of the liquid supplement pipe is below the liquid level of the lubricating liquid in the storage lubricating liquid tank, and the other end of the liquid supplement pipe is used for being connected with a pump. One end of the exhaust pipe is connected with the pump, and the other end of the exhaust pipe is communicated with the cavity of the storage lubricating liquid tank. A liquid supplement valve is arranged on the liquid supplement pipe, and a one-way valve is arranged on the exhaust pipe. The application can realize automatic supply of lubricating liquid, real-time state monitoring, self-adaptive control and fault diagnosis, effectively avoids the dry friction phenomenon of mechanical seal, and improves the stability and reliability of system operation.

The utility model relates to the technical field of pipeline structures, and discloses a mechanical seal flushing pipeline structure of a bottom-feeding stirrer, which comprises a spacer fluid inlet pipe orifice, a static ring is arranged on one side of the spacer fluid inlet pipe orifice, a movable ring is arranged on the top of the static ring, an O-shaped ring is arranged on one side of the movable ring, a spring is arranged on the top of the O-shaped ring, and a sealing ring is arranged on the other side of the spring. The top of the spring is provided with a shaft sleeve, one side of the shaft sleeve is provided with a bolt, the bottom of the bolt is provided with a filler seal, and the bottom, communicated with the spacer fluid outlet pipeline, of the filler seal flushing pipeline is provided with a first spacer fluid outlet pipe. Water at the flushing outlet of the double-end-face mechanical seal is led to the labyrinth seal to be used for flushing the labyrinth seal, so that sealing water of the double-end-face mechanical seal does not need to be treated, only water is fed, water return and water cooling circulation facilities do not need to be arranged, and the operation difficulty is greatly simplified.

The double-end-face mechanical sealing device with the buffering function comprises a connecting end base, fixing bases are arranged at the two ends of the connecting end base respectively, connecting cavities are formed in the ends, close to the connecting end base, of the two fixing bases respectively, and the inner walls of the two connecting cavities are in sliding connection with the outer walls of the two ends of the connecting end base respectively. A plurality of connecting grooves are annularly formed in the two ends of the connecting end base, buffer springs are arranged in the connecting grooves, one end of each buffer spring abuts against the inner wall of the corresponding connecting groove, and the other end of each buffer spring abuts against the inner wall of the corresponding connecting cavity. By combining the structural design of the double-end-face sealing device, the problems that mechanical resonance is continuously generated at the connecting position in the using process, and the flexible buffering effect of the outer structure of the double-end-face sealing device is poor are fully solved, and therefore the service life of the double-end-face sealing device is prolonged.

The utility model relates to the technical field of double-end-face mechanical sealing assemblies, and discloses an anti-corrosion double-end-face mechanical sealing assembly which comprises an outer shell, the two ends of the outer shell are both movably connected with static ring fixing shells, static rings are both fixedly connected in the two static ring fixing shells, a spring support is fixedly connected in the outer shell, and the spring support is fixedly connected in the outer shell. The two sides of the spring support are each provided with four symmetrical cylindrical grooves, by adjusting the distance between the two adjusting rings, the telescopic length of the spring is adjusted, and under the condition that the spring has small-amplitude elastic fatigue, it is guaranteed that the two movable rings can be pushed to be elastically attached to the two static rings through the elastic force of the two attaching rings, so that the two static rings are elastically attached to each other; therefore, the service life of the device is prolonged, the spring replacement frequency is reduced, and practicability is high.

The utility model relates to mechanical seal technical field discloses high back pressure integrated type double end face mechanical seal device for rotor pump, including shaft sleeve, medium side dynamic ring, medium side static ring, medium side push ring subassembly, medium side spring, gland, atmospheric side spring, atmospheric side static ring, atmospheric side dynamic ring and integrated limiting board, medium side dynamic ring cover is equipped in the shaft sleeve outer circumferential side surface, medium side push ring subassembly one end connects medium side static ring, medium side push ring subassembly other end connects the gland, is equipped with spring hole in the gland, medium side spring and atmospheric side spring all set up in the spring hole of gland, atmospheric side static ring is inserted in the gland, atmospheric side dynamic ring sets up on the shaft sleeve, integrated limiting board one end connects the gland. The utility model integrates double end face sealing structure as single module through integrated limiting board, reduces the component quantity, reduces assembly error. Medium side dynamic ring anti -rotation peg and atmospheric side dynamic ring anti -rotation peg synergies, ensure the stability under the high -speed rotation of dynamic ring.

The present application relates to a kind of disc cutter suitable for oscillation undercutting, belong to disc cutter technical field.It includes disc cutter shaft and disc cutter hub, disc cutter shaft includes coaxially arranged cutter shaft base body and cutter shaft fixed disc, the rear end of cutter shaft base body is integrally formed with cutter shaft fixed disc, and cutter shaft fixed disc is connected on the rear end of excavator cantilever by bolt.The disc cutter in the application adopts cantilever structure as a whole, and the disc cutter is fixed on the disc cutter hub, which can rotate freely with the disc cutter hub, and can withstand high-frequency excitation load brought by oscillation mechanism.During oscillation undercutting, the elastic bearing spacer ring between front bearing and rear bearing adjusts cutter starting torque by adjusting bearing play, so as to ensure bearing carrying capacity.Secondly, the end face mechanical seal form composed of front floating seal and rear floating seal forms a sealed chamber inside the disc cutter hub, so as to seal grease inside the disc cutter hub, greatly reduces the risk of grease leakage and seal failure.

The utility model discloses a kind of ultra-high temperature resistant metal bellows double-end mechanical seal structure, it is related to mechanical seal technical field, including main shaft and the mechanical seal assembly of being installed on main shaft, the quenching cavity for filling quenching liquid and the isolation cavity for filling isolation liquid are further had in mechanical seal assembly, isolation cavity is located outside quenching cavity, and the medium side of mechanical seal assembly is further equipped with the cooling assembly for filling cooling liquid, and cooling assembly is sleeved on main shaft. In the utility model, through the cooperation of quenching cavity, isolation cavity and cooling assembly, the inside and outside of its mechanical seal structure can be fully cooled, lubricated and reduced conduction heat.

The invention provides a liquid carbon dioxide medium shaft seal system of a carbon dioxide circulation main machine, belongs to the technical field of high-pressure fluid end face sealing, can at least partially solve the existing problems, and comprises the carbon dioxide circulation main machine which is provided with a shaft end sealing module and a medium supplementing module. Double barriers of end face mechanical sealing and the static sealing gasket are formed through the static sealing ring and the movable sealing ring, shaft end leakage is effectively restrained, and the air tightness and the liquid tightness of the whole machine are improved; liquid carbon dioxide is evenly conveyed to the sealing face through the medium ring groove and the distribution holes, a controlled positive pressure lubricating film is built, and the friction coefficient and the end face temperature rise are reduced.

The utility model relates to the technical field of mechanical seal leak detection, and discloses a single-end-face mechanical seal leak detection device, which comprises a detection box, a detection cavity and a pressure cavity are arranged in the detection box, detection assemblies are arranged on the top surface and the left side of the detection box, and each detection assembly comprises a driving rotating shaft arranged in the detection cavity. The top end of the rotating shaft penetrates and extends to the top surface of the detection box. The mechanical sealing element is installed on the outer wall of the rotating shaft, then oil liquid is input into the detection cavity, gas is input into the pressure cavity, when the mechanical sealing element leaks, the gas in the pressure cavity leaks into the detection cavity from the mechanical sealing element under the action of high pressure, bubbles are formed in the oil liquid in the detection cavity, and then the mechanical sealing element is detected. In the detection process, the rotating shaft can be driven to rotate, so that the moving ring of the mechanical sealing element rotates, the working state of the mechanical sealing element is simulated, and the mechanical sealing element can be detected in dynamic and static states at the same time.

The sealing device for the associated gas double-screw compressor comprises a labyrinth seal and a double-end-face mechanical seal, the labyrinth seal comprises a first sealing seat, a labyrinth seal groove is formed in the inner circumferential wall of the first sealing seat, and two annular grooves are further formed in the inner wall of the first sealing seat and used for dividing the labyrinth seal groove into three parts. The side wall of the first sealing seat is provided with an air inlet channel and an air outlet channel which communicate with the two annular grooves correspondingly. The double-end-face mechanical seal is of a packaging type structure and comprises a second sealing seat and a shaft sleeve, a main static ring and an auxiliary static ring are arranged at the two ends of an inner cavity of the second sealing seat respectively, the shaft sleeve is in transmission connection with the rotating shaft, the shaft sleeve is sleeved with a movable ring, and the two ends of the movable ring abut against the main static ring and the auxiliary static ring respectively. According to the sealing device for the associated gas double-screw compressor, through a combined sealing mode, sealing of working medium gas can be achieved, liquid media can be effectively sealed, and the overall sealing performance is stable and reliable.

The utility model relates to the technical field of mechanical sealing, in particular to a double-end-face mechanical sealing device special for a chlorination reaction kettle, which comprises a positioning flange ring, a first flange is connected above the positioning flange ring through a long bolt, a connecting sleeve is integrally arranged on the inner wall of the first flange, a sealing sleeve is connected inside the connecting sleeve, and a sealing ring is arranged on the sealing sleeve. A sealing ring is extruded between the connecting sleeve and the positioning flange ring; the mounting base is arranged at the bottom of the positioning flange ring, the mounting base and the positioning flange ring are in rotary clamping fit, and the mounting base is arranged outside the reaction kettle flange in a sleeving manner. Through the arrangement of the mounting base, the mounting base and the flange part of the reaction kettle can be mutually welded and positioned, and then through the rotary clamping and positioning of the mounting base and the bottom flange ring, the overall stable mounting of the mechanical seal is realized, and the mechanical seal is effectively prevented from being loosened due to the vibration of a machine body; therefore, the sealing effect in the later use period is ensured.

The invention relates to a disc cutter suitable for oscillation bottom cutting, and belongs to the technical field of disc cutters. Comprising a disc cutter shaft and a disc cutter hub, the disc cutter shaft comprises a cutter shaft base body and a cutter shaft fixing disc which are coaxially arranged, the rear end of the cutter shaft base body and the cutter shaft fixing disc are integrally formed, and the cutter shaft fixing disc is connected to a heading machine cantilever at the rear end through a bolt. The whole disc cutter is of a cantilever structure, and the disc cutter is fixed to the disc cutter hub, can freely rotate along with the disc cutter hub and can bear high-frequency excitation loads brought by an oscillation mechanism. During oscillation undercutting, the elastic bearing spacer ring between the front bearing and the rear bearing adjusts the starting torque of the cutter by adjusting the bearing clearance, so that the bearing capacity of the bearing is ensured. And secondly, an end face mechanical sealing mode formed by the front floating seal and the rear floating seal is adopted, and a closed cavity is formed in the disc cutter hub, so that grease is sealed in the disc cutter hub, and the risks of grease leakage and sealing failure are greatly reduced.