117results about How to "Not easy to leak oil" patented technology

The present invention relates to the turning buffer valve technology in crane, which is characterized by that in the main valve body through the installation of cavity, built-in channel and necessaryparts, the buffer valve, electromagnetic valve, adjustable backpressure valve, control valve and non-way valve are detachly combined in the main valve body to make it possess several functions of turning buffer valve in crane. Said invention possesses the advantages of reasonable compact structure, small volume and safe and convenient use, etc.

The invention provides a portable on-site Brinell hardness tester comprising a lifting device (2), a hydraulic augmentor (6), a displacement sensor (4), a pressure sensor (7) and a display (5), wherein the hydraulic augmentor is fixed above the lifting device and moves up and down along with the lifting device; the displacement sensor is arranged above the pressure bar of the augmentor to be usedfor measuring displacement; and the pressure sensor is arranged below the compression bar of the augmentor to be used for measuring pressure. The portable on-site Brinell hardness tester has the characteristics of good hydraulic airtightness, no oil leakage, integration of processing devices and measuring devices, simple measuring process, high measuring efficiency and low price.

The invention relates to a lubrication system for rotating shuttle components of embroidery machines, in particular to a rotating-shuttle-component lubrication system consisting of a rotating shuttle, a rotating-shuttle shaft and a rotating-shuttle shaft sleeve, wherein the inside of the rotating-shuttle shaft is provided with a through hole coaxial with the rotating-shuttle shaft; one end of the through hole is a lubricating oil inlet communicated with a rotating-shuttle oil supply device through a duct, and the other end of the through hole is a lubricating oil outlet communicated with an inner cavity of the rotating shuttle; and the surface of the rotating-shuttle shaft is provided with an oil spray hole communicated with the through hole. The lubrication system not only can continue oiling the rotating shuttle, the rotating-shuttle shaft and the rotating-shuttle shaft sleeve, but also can cool and clean the components.

The invention relates to a butt joint process for a 10 kV oil-impregnated paper insulated cable and a cross-linked polyethylene insulated cable. A stress distribution tube is utilized to realize the even distribution of the point electric field of butt joint cables, thereby eliminating the damage to the operation of the cables caused by the point electric field; a composite tube made of heat-shrinkable materials is utilized to realize the insulation restoration of a cross-linked cable and the even distribution of the electric field, and the composite tube is an integral tube compounded by a transistor, an insulating tube and the stress distribution tube, thereby eliminating the errors of overlapping sizes when the transistor, the insulating tube and the stress distribution tube are manually made and mounted, so as to ensure the success ratio of the production of cable heads; a metal connection conducting tube separates and seals the existing metal conducting tube with a flux tube in the middle thereof; and after the cables are butted with each other, and the oil of the oil-impregnated paper insulated cable cannot flow into the cross-linked cable by a metal wire core, so as to avoid the pollution of the oil of the oil-impregnated paper insulated cable to the cross-linked cable after butt joint. The invention has the advantages that after the oil-impregnated paper insulated cable is butted with the cross-linked cable by the process, the butt joint position is easy to leak the oil, the operation is stable, and the time is long.

The invention discloses a method for processing codonopsis pilosula dry product. When the codonopsis pilosula dry product is prepared, firstly, white sugar solution with certain concentration is used for immersing codonopsis pilosula, and then the codonopsis pilosula is repeatedly baked and kneaded after the immersion. In the method, the sugar solution with certain concentration is used for immersing the codonopsis pilosula, and then no worm damage happens to the prepared codonopsis pilosula within one year, therefore, the immersion with the sugar solution can replace the sulfurate suffocating in the process of traditional codonopsis pilosula dry product processing so as to realize good worm and dampness preventing effect and long worm and dampness preventing time; in addition, the prepared codonopsis pilosula has good drug effect, does not leak oil, is not toxic or harm to human bodies and causes no pollution to the environment. Meanwhile, when the codonopsis pilosula is baked and kneaded, the baking temperature and the kneading time are under strict control so as to ensure the good mouth taste of the codonopsis pilosula.

The invention discloses a transmission switching device of an electric hammer, and the device comprises an intermediate shaft; an intermediate shaft gear, a transmission gear, swing rod bearings and an intermediate shaft sleeve are arranged on the intermediate shaft; a connecting part extends outwards from the transmission gear; the connecting part is sleeved on one end of the intermediate shaft sleeve; the swing rod bearings are respectively sleeved on the connecting part and the intermediate shaft sleeve; keyway matching structures are arranged between the other end of the intermediate shaft sleeve and the intermediate shaft, the connecting part and the swing rod bearings; a shift bearing is arranged on the peripheral side of the intermediate shaft sleeve; the inner ring of the shift bearing is the intermediate shaft sleeve, and a groove is arranged on the outer ring of the shift bearing; and a shifting mechanism is connected into the groove. The transmission switching device of the electric hammer has the beneficial effects that a transmission mechanism and the shifting mechanism stay still relatively, no friction, wear, heating or oil leakage occurs, the service life is long, the maintenance amount is small, the gear friction phenomenon is overcome, and the working efficiency is high.

The invention discloses a method for processing dry root of pilose asiabell. The method is characterized by comprising the following steps of 1, removing bark of fresh root of pilose asiabell, and cleaning up for next use, 2, based on the weight of the fresh root of pilose asiabell, adding 3 to 5wt% of old tea and 3 to 5wt% of honeysuckle with water of which the amount is 5 to 8 times the total amount of the old tea and the honeysuckle, carrying out decoction for 30 to 40 minutes, adding the fresh root of pilose asiabell into the decoction solution, putting the mixture into a vacuum tank, carrying out vacuum-pumping until the pressure is in a range of -0.09 to 0.10Mpa and keeping a vacuum state for 40 to 60 minutes, and 3, taking out the treated root of pilose asiabell, carrying out draining, drying at a temperature of 40 to 45 DEG C with a kneading process carried out once every 1-2 hours, for 10 to 20 minutes at a time, until water content is in a range of 10 to 14%, and carrying out vacuum packaging to obtain the dry root of pilose asiabell. Root of pilose asiabell is immersed by a certain concentration of a decoction solution of old tea and honeysuckle, and thus the treated root of pilose asiabell is not damaged by worms in one year, has good insect prevention and moisture prevention effects, long insect prevention and moisture prevention duration time, good drug efficacy and a low oil leakage ratio, is not poisonous to a human body and does not produce pollution on the environment.

The invention discloses a preparation method of fresh angelica sinensis, which comprises the following steps: sterilizing and dicing the cleaned fresh angelica; quickly freezing the fresh angelica; vacuum freezing and drying the quickly-frozen angelica; removing scrap iron impurities by absorbing; and carrying out damp-proof package and sterilization to obtain the angelica sinensis. The fresh angelica sinensis can be used for medicated diet addictive, food seasoning, medicinal application and the like, and has remarkable improving functions crowds having the symptoms of blood stasis and blood deficiency such as blood deficiency and sallow complexion, dizziness and palpitation, abnormal menstruation, closure dysmenorrheal, asthenia cold abdominalgia, intestinal dry constipation, rheumatic arthralgia, injury from falling down, superficial infection and. The preparation method is simple and feasible, has stable and reliable quality of products and less loss of effective components as well as the advantages of convenience for eating, insusceptible mold, long shelf life and the like.

The invention relates to a thermoplastic elastomer door seal easy to weld. The door seal is prepared from, by weight, 40-55 parts of SEBS elastomers, 5-15 parts of tackifying resin, 10-15 parts of filler, 5-15 parts of processing oil, 10-15 parts of polypropylene, 1-2 parts of lubricating agent, 0.1-1 part of pigment, 0.1-0.5 part of antibacterial and antifungal agent, 0.1-0.5 part of antioxidant and 0.1-0.5 part of ultraviolet light absorber. The invention further provides a preparation method of the thermoplastic elastomer door seal. The thermoplastic elastomer door seal easy to weld is high in welding strength and good in rebound elasticity, still keeps the good elasticity in the low-temperature application environment such as refrigerators and other refrigeration appliances, prevents a flash seam from being produced, can better close the gap between a door body and a box body, reduces electric appliance energy consumption and makes a contribution to further energy conservation of the refrigeration appliances.

The invention discloses a pulse metallic polypropylene film capacitor. The pulse metallic polypropylene film capacitor comprises a metal cylinder, a capacitor core, gold spraying layers, an upper insulation cover and a lower insulation cover, wherein the upper insulation cover and the lower insulation cover are fixedly connected by an explosion-prevention plate, a protection lead is arranged between the upper insulation cover and the explosion-prevention plate, an annular explosion-prevention gasket is arranged at each of the upper part and the lower part of the lower insulation cover, an impregnant is arranged in a gap between the metal cylinder and the lower insulation cover, the capacitor core is arranged in the metal cylinder, the gold spraying layers are arranged at the top end and the bottom end of the capacitor core, the capacitor core comprises a polypropylene film, the polypropylene film is evaporated with a metal layer in a high vacuum environment, and the metal layer comprises a wave-shaped double-sided metallic ZnAl layer, a first thickening layer and a second thickening layer. The pulse metallic polypropylene film capacitor has the advantages of excellent performance and high safety coefficient, and the capability of standing ripple current is high.

The invention relates to the technical field of speed reduction of solar tracking devices, in particular to a solar heliostat precision cycloid transmission device. The device is characterized in that: (1) the input shaft is provided with an eccentric section P and a thread section L, wherein a roller bearing is matched on the eccentric section P, an eccentric inner nut is arranged on the thread section L, the external circle of the eccentric inner nut is matched with the roller bearing, the eccentricities of the eccentric section P and the eccentric inner nut are equal, and a space ring is arranged between the eccentric section P and the eccentric inner nut so as to form a double-eccentric input shaft; (b) the engaged tooth profile direction of a cycloid gear and needle teeth of the upper half area is opposite to the engaged tooth profile direction of the other cycloid gear and needle teeth of the lower half area, so that the phase angle phi between the eccentric section P and the eccentric inner nut on the input shaft is 180-(0.05-0.15) degrees; and (c) an output shaft with a disk is connected with a uniform loading tray by using 6 to 8 uniformly distributed pins to form a cage-shaped output assembly, and two sides of the cage-shaped output assembly are supported by using a bearing respectively. The device has the advantages of low return difference, high overload capacity, long service life, simple structure and low manufacturing cost.

The invention discloses an integral internal-discharge-type power steering pump. One end of a pump body is provided with a pump cover; an oil inlet side plate, a stator and an oil outlet side plate are installed in the pump body; a rotor is sleeved in a stator inner hole; a blade is installed in a rotor slot hole; a shaft and the rotor are connected; a slide valve is installed in the pump body; a spring is installed on the slide valve; the side valve is internally provided with a conical valve; and the conical valve is provided with a spring. According to the integral internal-discharge-type power steering pump, the flow rate control and pressure control are realized on the basis of a quantitative pump principle, the power steering pump has the advantages of high working pressure, less noise, small volume, less possibility of oil leakage, high control flexibility and high safety.

The invention discloses a sulfur-free processing method for angelica sinensis. The method comprises the following technological links: washing, air-drying, shaping and stacking, solar room-temperature drying, hermetically boxing, storing and the like. Angelica sinensis deterioration phenomena, such as mildewing and worm eating can be controlled by the method without sulphur fumigating, and the angelica sinensis medicinal material quality can be greatly improved. The processing method is simple and feasible, the cost is low, and the angelica sinensis quality preserving effect is great.

The invention discloses a two-stage pressure revolution cushion valve which is used on a revolution system for a rotary drilling rig. The two-stage pressure revolution cushion valve consists of a pair of two-way balance valves with symmetrical structures; a pair of oil inlet pipelines are connected with oil outlet pipelines through a pair of check vales; pressure valve plugs of the balance valves are provided with pilot pistons, springs A, and springs B respectively; the pilot pistons are communicated with two oil inlet pipelines through oil pipelines respectively; and the pressure valve plugs are provided with pipelines which are connected with the oil outlet pipelines. The cushion valve has the multi-functional characteristics, integrates a large number of functions which are required by the revolution working conditions, and can realize the high-pressure starting and low-pressure braking functions during use, and solve the problems of low revolution stability and revolution drifting in the revolution process and the working drilling process of the rotary drilling rig. Meanwhile, the cushion valve has a compact structure, pipeless design, and a small volume, is easy to produce, assemble and use, and hardly leaks oil.

The invention relates to a vehicle and a power device thereof. The power device comprises a device shell. The device shell is internally provided with a motor and a planet row, further provided with abearing mounting position used for mounting of a corresponding bearing, and internally provided with a lubricating oil pump; the lubricating oil pump is provided with a power input end in transmission connection with the planet row; the power device further comprises a lubricating oil channel connected with an oil outlet of the lubricating oil pump for guiding lubricating oil towards the planet row and / or the mounting position of the corresponding bearing; and the lubricating oil channel is constituted by an oil pipe and / or an oil hole formed in the device shell. According to the power device, the oil is not liable to leak when a to-be-lubricated part is lubricated forcibly, and the power device is used for a hybrid power system and the vehicle.

The invention discloses a method for processing codonopsis pilosula dry product. When the codonopsis pilosula dry product is prepared, firstly, white sugar solution with certain concentration is used for immersing codonopsis pilosula, and then the codonopsis pilosula is repeatedly baked and kneaded after the immersion. In the method, the sugar solution with certain concentration is used for immersing the codonopsis pilosula, and then no worm damage happens to the prepared codonopsis pilosula within one year, therefore, the immersion with the sugar solution can replace the sulfurate suffocating in the process of traditional codonopsis pilosula dry product processing so as to realize good worm and dampness preventing effect and long worm and dampness preventing time; in addition, the prepared codonopsis pilosula has good drug effect, does not leak oil, is not toxic or harm to human bodies and causes no pollution to the environment. Meanwhile, when the codonopsis pilosula is baked and kneaded, the baking temperature and the kneading time are under strict control so as to ensure the good mouth taste of the codonopsis pilosula.

The invention discloses a pneumatic hydraulic three-position five-way reversing valve. The valve comprises a valve body, a pneumatic piston, a pneumatic piston plug, a ball seat, a stem, a steel ball and a center spring. By means of lateral beating and pressing in a pneumatic mode, the function of hydraulic reversing is achieved. An electromagnet does not need to be adopted in the valve body, production cost of the revering valve is effectively reduced, and meanwhile the service life is prolonged.

The invention discloses an oil tank assembly and a vehicle with the same. The oil tank assembly comprises a tank body, an air channel disc and an oil retaining disc, wherein the tank body is provided with a cavity body and the top of the cavity body is opened to form an opening, and a first stop part is arranged at the inner side close to the opening, of the tank body; the air channel disc at least partially stretches into the cavity body; and the oil retaining disc is arranged on the part stretching into the cavity body, of the air channel disc, the peripheral edge of the oil retaining disc is separated from the first stop part to form a first channel, and the first channel communicates with an external space. The oil tank assembly disclosed by the invention is capable of effectively avoiding the splashing of oil in the tank body.

The invention relates to a novel carrier roller choke plug assembly of a belt conveyer. Single-row tapered roller bearings and thrush bearings are sequentially arranged at both ends of a step of a rotating shaft; the rotating shaft is arranged in a through hole in the middle of a bearing block through the single-row tapered roller bearings and the thrush bearings; a standard oil injection nozzle is arranged at the oil opening position on the end part of the rotating shaft; a circular hole is formed in the center of a bearing gland; an annular seal ring groove in an appropriate shape is formed at the position of the circular hole; a rotating shaft seal ring is arranged in the annular seal ring groove; through the rotating shaft seal ring, a seal is formed between the bearing gland and the rotating shaft; an annular seal ring groove in an appropriate shape is formed on the excircle of an upper opening of the bearing gland; a bearing cavity seal ring is arranged in the annular seal ring groove; and through the bearing cavity seal ring, a seal is formed between the bearing gland and an inner cavity of the bearing block. In order to prevent dust and the leakage of lubricating oil, a bearing block plug cap is arranged at the position of the through hole at the inner end of the bearing block.

The invention discloses a small connecting lever insulated overhead working truck cantilever crane and a control system thereof. A platform power supply control circuit is adopted for realizing long-time continuous platform power supply to provide a platform operation control power supply, so that the problem concerned with platform power supply is solved. A rotary table main control proportionalvalve group for controlling main actions of a cantilever crane is adopted by a cantilever crane main action control circuit to realize proportional control of all the main actions of the cantilever crane, and all the main actions can be taken separately or in a combined manner. One proportional valve in the rotary table main control proportional valve group is adopted by a cantilever crane platform auxiliary action control circuit, so that all the auxiliary actions of up to 8 platforms can be controlled. A simple differential connection manner of a shuttle valve is adopted by telescopic actions of the cantilever crane, so that the cantilever crane can extend out rapidly without accelerating. Distributed optimal distribution is adopted for the valve group, so that the load of the platform occupied by the valve group is small, an insulating cantilever has less pipelines and a small diameter, an insulating cantilever towing chain pipeline is easy in distribution, the pipeline pressure loss is low, and the valve group is prevented from leaking oil easily.

The invention provides a multi-continuous-containing bread baking box and a machining technique thereof. The multi-continuous-containing bread baking box comprises an integrally-formed multi-continuous-containing baking box main body, main body positioning holes, sealing plates and cover plate positioning holes. The multi-continuous-containing baking box main body comprises long groove-shaped mold cavities, a partition plate is arranged between every two adjacent long groove-shaped mold cavities, and the cover plate positioning holes are formed in the partition plates. The main body positioning holes are formed in the bottom surfaces of the long groove-shaped mold cavities, and the main body positioning holes in the long groove-shaped mold cavities are arranged at equal intervals. The sealing plates are fixed to the two ends of the multi-continuous-containing baking box main body. The multi-continuous-containing bread baking box has the advantages that the design is scientific, the number of joints is small, the structure is firm, and the service life is long. The machining technique of the multi-continuous-containing bread baking box comprises the following steps of (1) plate positioning; (2) laser cutting of the main body positioning holes and the cover plate positioning holes; (3) stretch forming; (4) re-performing of the step (3); (5) welding of the sealing plates; and (6) sand blasting, paint spraying and drying of the surface of a mold obtained after welding, and completing of manufacturing. The machining technique of the multi-continuous-containing bread baking box has the advantages that the design is scientific, the technological steps are simple, the labor intensity of workers is relieved, and forming steps are few.

The invention discloses a welded-type rear cover of an automobile through axle housing, belonging to an automobile drive axle. The welded-type rear cover of an automobile through axle housing is characterized in that the welded-type rear cover is mainly installed and welded by a cover body and a connection base, wherein the cover body is in a cavity round-basin shape; a vertical frustum-shaped bulge is arranged on the right of the center of the front surface of the cover body; the left part and the right part of the front surface of the cover body are both circular-arc planes; the upper part of the left circular-arc plane of the cover body is provided with a base hole for welding the connection base; the lower part of the left circular-arc plane of the cover body is provided with an oil hole with an internal thread for screwing an oil-drainage plug screw; the connection base is a step-shaped cylinder, wherein the external diameter of the rear-end section of the step-shaped cylinder is small; the upper circumference of the front-end section of the connection base is evenly provided with three semicircle lugs; the lugs are evenly provided with connection screw holes; the connection base is provided with a center step hole, wherein the diameter of the rear-end section of the center step hole is small, and the diameter of the front-end section of the center step hole is big; the center step hole is used for the through shaft to correspondingly penetrate through and being screwed with bolts for fastening and positioning; and the rear cover and the through axle housing are welded. The welded-type rear cover has the advantages of good welding performance and light weight and has small possibility of leaking oil.

The invention relates to the technical field of a power transformer, and particularly relates to a transformer iron core grounding lead structure. The transformer iron core grounding lead structure comprises a base, an insulating terminal plate and a protection cover; the base comprises side walls and an end cover; multiple terminals are arranged on the insulating terminal plate; a grounding wireand a lead are arranged in the base; and a measurement cable is arranged in the protection cover. The transformer iron core grounding lead structure does not need a sleeve and a copper bar, so that the manufacturing cost is lowered; the insulating terminal plate can be sealed conveniently, without causing oil seepage and leakage easily; and by virtue of the protection cover, complete protection performance is provided, and damage caused by external force can be avoided effectively, so that the transformer iron core grounding lead structure can be widely applicable to various power transformers.

The invention discloses a simple method for reducing the temperature of a bearing block and an air-cooled bearing structure. According to the simple method for reducing the temperature of the bearing block and the air-cooled bearing structure, the air-cooled bearing structure comprises a bearing block, a bearing frame and an oil seal drum which is connected with the bottom of the bearing frame and arranged around a pump shaft; the center of the bearing block is provided with the pump shaft and a journal around the pump shaft; a bearing cap is arranged on the bearing frame, a bearing is arranged among the journal, the bearing frame and the bearing block, the upper end of the journal extends from the bearing cap, and a fan frame is arranged above the bearing cap, mounted on the pump shaft in a sleeve mode and fixed to the top of the journal; a fan blade for generating axial air flow is arranged around the pump shaft on the fan frame; the bearing frame is a hollow cylindrical housing and provided with a bottom surface, and one or more cooling fins are arranged on the side wall and the bottom surface of the bearing block. The simple method for reducing the temperature of the bearing block and the air-cooled bearing structure have the advantages that the bearing structure is not prone to oil leakage, simple and compact in structure, and small in size, good in cooling effects due to the fact that the air flow can be directly generated above the bearing and the cooling fins are arranged for auxiliary, good in practicability and easy to popularize.

The invention belongs to the technical field of high-pressure mould-clamping equipment, and particularly discloses a mould-clamping oil cylinder device, which comprises a piston rod and a piston, wherein the piston is connected with the piston rod, the outer circumferential wall, near the upper end surface and the lower end surface, of the piston is respectively provided with a first guide ring and a second guide ring, the middle part of the outer circumferential wall of the piston is provided with a first sealing ring, the outer circumferential wall, near the lower end surface, of the piston rod is provided with a third guide ring, the middle part of the outer circumferential wall of the piston rod is provided with a second sealing ring, and the cross sections of the first guide ring, the second guide ring and the third guide ring are respectively in a concave shape. By adopting the structure, a buffer space with a larger angle is generated when a deflection angle is formed between the piston and a cylinder barrel, so easiness in scratching of the cylinder barrel is avoided, and easiness in oil leakage is also avoided.

The invention relates to an integral multifunctional all-hydraulic steering gear, which comprises a valve body. An oil inlet, an oil return port, a left oil port and a right oil port are formed on the valve body; and a safety valve opening, two oil supplementing valve openings and two bidirectional overload valve holes are formed on the valve body. A one-way valve is arranged in the oil inlet; a safety valve is arranged in the safety valve opening and is communicated with the oil inlet; oil supplementing valves are arranged in the oil filling valve openings and are communicated with the oil return port; bidirectional overload valves are arranged in the bidirectional overload valve holes; and the two bidirectional overload valves are communicated with the left oil port and the right oil port. The one-way valve, the safety valve, the oil supplementing valves and the bidirectional overload valves are integrated in the valve body of the steering gear. The integral multifunctional all-hydraulic steering gear has the advantages of difficult oil leakage compared with the prior art by connecting through valve blocks, and also has the advantages of compact structure, small volume and convenient installation.

The invention provides a wet material mixing machine. The wet material mixing machine comprises stirring equipment, mixing equipment, lifting equipment and electrical control equipment, wherein the mixing equipment, the lifting equipment and the electrical control equipment are located below the stirring equipment, the mixing equipment is matched with the stirring equipment, and the lifting equipment is connected with the stirring equipment; and the electrical control equipment is connected with the stirring equipment and the lifting equipment through leads respectively. The invention further provides a use method of the wet material mixing machine. According to the wet material mixing machine, wet solid materials and wet liquid materials can be effectively mixed, and the materials can be conveniently and thoroughly discharged, so that the pollution is avoided; and the wet material mixing machine is very suitable for being popularized and used in practical work for the preparation of heart-protecting musk pills.

The invention relates to an automobile hub combined oil seal belonging to a seal element. The automobile hub combined oil seal is characterized by mainly comprising an oil seal framework, a seal ring and spring rings, wherein the oil seal framework mainly comprises a main framework, a left support framework and a right support framework; the left part of the main framework is bent in a U shape toform an inner ring body and an outer ring body which are connected into a whole; the right end section of the inner ring body of the main framework is a right-angle recurvate upright ring body; the right-angle bent annular left support framework is in interference pressing or welding on the lower surface of the left part of the inner ring body of the main framework; the right-angle bent annular right framework is in the interference pressing or welding on the lower surface of the right part of the outer ring body of the main framework; the upright ring body of the right side of the inner ringbody of the main framework is provided with the seal ring of which the cross section is shaped like a Chinese character shan and is respectively and correspondingly provided with the left spring ringand the right spring ring; and the inner circumference of the seal ring is provided with a left lip ring and a right lip ring which are protruded. The invention has good coaxiality and good seal effect.

The invention provides a transport plane roller choke plug device. A roller bearing and a double-acting bearing are arranged on an axial rotary shaft, the axial rotary shaft, the double-acting bearing and the roller bearing are arranged on a bearing seat in a combined mode, the end portion of the bearing seat is provided with an upper bearing cover through a bolt, a sliding block is connected with the axial rotary shaft, and an hydraulic fluid port is arranged inside the axial rotary shaft. Seal rings respectively arranged on two sides of the axial rotary shaft are arranged on small bearing seats, bearing traction bars arranged on two sides of the sliding block are connected with the bearing seat, and the rear end of the bearing seat is provided with a double-acting bearing cover which is arranged on the inner side of the bearing seat.