67results about How to "Reduce rotational torque" patented technology

A tapered roller bearing comprises an outer race, an inner race, a plurality of tapered rollers, and a cage. A small-diameter end portion of the inner race is formed with a small flange portion for limiting axial movement of the tapered rollers and a cylindrical portion which has a less diameter than the small flange portion and is connected to an axial outer end of the small flange portion. The cage is formed at a small-diameter end portion thereof with a bent portion which is bent inward in a radial direction. A small-diameter end portion of the cage has a bent portion which is faced to an outer surface of the cylindrical portion of the inner race with a predetermined clearance therefrom such that a labyrinth is created between the cage and the inner race.

Provided is a sealing device configured so that, irrespective of a rotational direction, rotational torque can be reduced and the leakage of sealed fluid can be prevented. The seal ring is characterized in that in the seal ring (100) sliding relative to the low pressure-side sidewall surface of an annular groove, a dynamic pressure generation groove (120) is formed in the slide surface which slides relative to the sidewall surface, the dynamic pressure generation groove (120) comprises a first groove (121) circumferentially extending with a constant radial width and a second groove (122) extending from the circumferential center of the first groove (121) up to the inner peripheral surface thereof and conducting sealed fluid into the first groove (121), and the first groove (121) is provided at a position within a slide region sliding relative to the sidewall surface.

The invention discloses a variable cross-section spiral drilling tool which comprises a guiding device and a spiral drilling rod installed on the guiding device, the spiral drilling rod comprises a spiral rod and a drill bit portion installed at the bottom end, the drill bit portion comprises an outer sleeve, a guiding rod, a connecting rod and an expanding head blade, and one end of the outer sleeve is fixedly installed at the bottom end of the spiral rod; the guide rod is sleeved by the outer sleeve, and one end of the guide rod extends out of the outer sleeve to form a drill bit; one end ofthe expanding head blade is hinged to the outer sleeve, one end of the connecting rod is hinged to the guide rod, and the other end of the connecting rod is hinged to the expanding head blade; and when the guiding rod moves along the axis direction, the expanding head blade is unfolded or folded. The invention further discloses a construction method for a variable cross-section cast-in-situ boredpile by utilizing the variable cross-section spiral drilling tool. The drilling tool integrates high efficiency and rapidness, integrates drilling, chambering, pouring and detection, and has good operation performance. The construction method has the advantages of high efficiency and high construction precision.

The invention relates to the field of medical instruments, in particular to a cutting stapling device. The cutting stapling device comprises a staple box, a stapler, a staple box steering connecting rod assembly and a stapler steering connecting rod assembly, wherein a staple box locking bump is arranged on a staple box cover assembly of the staple box; the two ends of the staple box steering connecting rod assembly are connected with a bent head of the staple box and a stapler steering connecting rod respectively; the stapler is provided with an stapler gun barrel inner core and a two-way drive rotating mechanism connected with the stapler steering connecting rod; the inner side wall of the stapler gun barrel inner core is provided with a guide surface, a guide groove matched with a clamping block and a locking groove matched with the staple box locking bump; the clamping block slides to a preset position along the guide groove and rotates to be connected with the stapler steering connecting rod assembly; and the two-way drive rotating mechanism rotates for enabling the bent head to be bent. The cutting stapling device has the beneficial effects that the staple box and the staplerare inserted and assembled more simply and conveniently, and the bent head is driven to be bent through the two-way drive rotating mechanism, so that the bent head runs more stably.

The invention discloses a butterfly valve with an O-shaped sealing ring and a bearing, comprising a valve body, a valve rod and a butterfly plate, wherein the butterfly plate is arranged in the valve; the valve rod is arranged on the valve body in a penetrating manner and is fixedly connected with the butterfly plate in the valve body; the O-shaped sealing ring and the bearing are arranged between the valve rod and the valve body; and the O-shaped sealing ring is adopted as a sealing structure between the valve rod and the valve body, and compared with the sealing structure formed by adopting flexible graphite and a packing gland, not only are the assembly and the disassembly of operators convenient, but also the rotating torque of the valve rod also can be reduced, and the sealing performance is more reliable. In addition, the bearing is added between the valve rod and the valve body, the rotating torque of the valve rod can be further reduced, and the labor intensity of the operators is greatly reduced.

The invention provides a micro-drill driving device with adjustable stroke, and belongs to the technical field of precision machinery. The driving device comprises a shell, a middle sleeve and a plunger, the middle sleeve is fixed in the shell; an air inlet channel is formed between the middle sleeve and the shell; a piston rotationally connected with the inner wall of the middle sleeve is arranged at the upper end of the plunger; an impeller is arranged in the middle of the plunger; an adjusting sleeve is connected between the lower end of the plunger and the middle sleeve; a driving air cavity is formed between the upper end of the adjusting sleeve and the lower end of the piston; the middle sleeve is provided with a plurality of air inlet holes communicating with the driving air cavityand the air inlet channel. An airflow reciprocating channel with the upper end penetrating through the upper end face of the plunger is formed in the plunger, a cover plate for blocking an opening inthe upper end of the middle sleeve is fixedly connected to the top of the middle sleeve, a compressed air cavity communicating with the airflow reciprocating channel is formed between the lower end face of the cover plate and the upper end face of the plunger, and multiple functional holes communicating with the airflow reciprocating channel are formed in the middle of the plunger; a micro-drill mounting head is arranged at the lower end of the plunger. The driving device has the advantages of high operation efficiency and the like.

The invention discloses an air seal type friction-free pneumatic semispherical valve and a control device thereof. The air seal type friction-free pneumatic semispherical valve comprises a semispherical valve body, a pneumatic driving apparatus and an automatic control apparatus; the pneumatic driving apparatus is movably connected with the semispherical valve body; the pneumatic driving apparatuscomprises an executing mechanism, a piston, a rear cover, a connecting rod, a crank, a rotary shaft, a copper sleeve, an inner hexagonal adjusting positioning shaft and a cylinder barrel; and one endof the rotary shaft is connected with the semispherical valve body. By means of the air seal type friction-free pneumatic semispherical valve and the control device thereof, the valve adopts an air seal type sealing structure and a sphere rotation and seal ring friction-free structure which are combined, a seal ring is protected against abrasion to the maximum degree, the rotation torque of an existing valve is reduced to the maximum degree, and the service life of valve sealing is improved; and through the semispherical structure, the weight is low, the material cost is reduced greatly, whole rotation is flexible, and meanwhile the effect of automatic compensation can be achieved.

The invention discloses a small torque electric ball valve, which comprises a valve body (1), a ball valve core (2), a sealing ring (3), an O-ring (4), a valve stem (5) and an electric driver (6). In the present invention, an elastic and silicon rubber O-ring is arranged between the sealing ring and the valve body. When the electric ball valve is started, a shearing and sliding tendency occurs between the ball valve core and the sealing ring, and the elasticity of the O-ring is used to make the sealing ring produce Elastic retreat, reducing and overcoming the static adhesion between the ball valve core and the sealing ring, using a small torque to make the static friction between the ball valve core and the sealing ring transition to dynamic friction, thereby reducing the technical scheme of the starting torque, making the electric ball valve , to achieve the purpose of reducing the starting torque and turning torque.

The invention provides a rigid centering device. The rigid centering device is applied to a casing pipe, and comprises a barrel, centering strips and rotary wheels, wherein the barrel is in a hollow shape, the centering strips are arranged on the barrel in the axial direction, the rotary wheels are rotatably fixed to the interiors of the centering strips through rotary shafts, and the side walls of the rotary wheels penetrate through the side wall of the barrel. According to the rigid centering device, frictional force between rotation of the centering device and the well wall is reduced, therotating friction resistance of the casing pipe is greatly reduced, the casing pipe rotating function in the casing pipe tripping-in and well cementing processes is achieved, the casing pipe rotatingresistance is effectively reduced, a torque when the casing pipe rotates is reduced, normal rotation of the casing pipe is ensured, a screw thread of the casing pipe is protected, and meanwhile casingpipe rotation is prevented; and the centering degree of the casing pipe is ensured, implementation of a technology of rotary casing pipe well cementing and rotary tail pipe well cementing can be ensured, rotation of the casing pipe in the casing pipe tripping-in process can be ensured, and sticking of the casing pipe is prevented.

The invention discloses a well drilling cementing cement head, and relates to the field of petroleum development well drilling. The well drilling cementing cement head comprises a cement head body. An upper connector is connected to the upper end of the cement head body in a threaded manner, a main cement head through hole and an auxiliary cement head through hole are formed in the cement head body, stop pin cock holes are radially formed in the cement head body, stop pin cocks are arranged in the stop pin cock holes, main cock through holes, auxiliary cock through holes and oblique cock through holes are formed in the stop pin cocks, the main cock through holes are formed in the stop pin cocks in the main cement head through hole, the auxiliary cock through holes are formed in the stop pin cocks in the auxiliary cement head through hole, the main cock through holes are perpendicular to the auxiliary cock through holes, one end of each oblique cock through hole is communicated with the corresponding auxiliary cock through hole, and the other end of each oblique cock through hole is communicated with the main cement head through hole; one end of each stop pin cock is connected with a stepper motor, and the other end of each stop pin cock is connected with a cock position indicating rod. The well drilling cementing cement head has the advantages that the main through holes and the auxiliary through holes can be reliably and accurately opened or closed without manual operation, and the cement head can be developed towards the automation direction and can be easily and safely operated.

The invention relates to a combined sealing ring with high sealibility and a low rotary torque. The combined sealing ring consists of an inner framework, a rubber body and a dust cover, wherein the inner framework and the dust cover form a sealing cavity; the sealing rubber body is placed in the sealing cavity; the sealing rubber body comprises a rubber main body with the shape matched with the shape of the inner framework, and a main lip, an auxiliary lip and a double side lip structure that extend from the rubber main body; the auxiliary lip is in interference fit with an inner wall of the dust cover; the double side lip structure comprises a first side lip and a second side lip; and the first side lip and the second side lip are in interference fit with the inner wall of the dust cover. According to the combined sealing ring, as the double side lip structure is adopted based on the existing combined sealing ring, the radial magnitude of interference of the main lip is reduced, and friction between the sealing lips and the dust cover, and the rotary torque are reduced. According to inelastic FEM (Finite Element Method) analysis, the waist shapes of the side lips are scientifically designed, the rubber lips are automatically and elastically recovered and compensated after being abraded, and the sealibility is not reduced.

The invention discloses a rock reamer. The rock reamer comprises a hollow central shaft which is connected with a drill rod, a front pilot and a back pilot which are fixedly arranged on the hollow central shaft, and a hobbing cutter which can conduct autorotation and is arranged between the front pilot and the back pilot. A central axis of the hobbing cutter and the central shaft are parallelly arranged, the hobbing cutter comprises a cylindrical section which has a righting function and a front end face formed at the front end of the cylindrical section, and hard alloy teeth used for crushing rocks are evenly distributed on the front end face and the peripheral surface of the cylindrical section. By improving a hobbing cutter structure and arranging positions, the phenomenon that a matched righting machine is additionally arranged on a reamer is effectively avoided, weight of tool is reduced, rotation torsion moment is reduced, cost is lowered, and service life of the tool is prolonged. In addition, the hobbing cutter is clamped or connected between the front pilot and the back pilot in a threaded mode, and therefore disassembly of the hobbing cutter is convenient.

The invention relates to a blockage clearing machine with a scraper rotating surface parallel to a wall of a polyhedral bin, and belongs to the field of blockage clearing machines. The blockage clearing machine comprises a scraper and a scraper driving part, wherein the scraper driving part comprises a motor, an output shaft of the motor is connected with an input shaft of a speed reducer, a driving gear is arranged on an output shaft of the speed reducer, a large gear is meshed on the driving gear, the large gear is arranged on a scraper main shaft, and the front end of the main shaft is provided with the scraper, the scraper is positioned in the bin, the scraper driving part is fixedly arranged outside the bin, the scraper rotating surface is parallel to the inner wall of the bin, the blockage clearing machine is respectively arranged a plurality of bin surfaces of the polyhedral bin body, the blockage clearing machine is used for carrying out large-area scraping or local stirring onthe powder on the inner wall of the polyhedral bin, the powder on the inner wall of the bin can be prevented from bonding, the flow of the powder is accelerated, and normal use of the bin is guaranteed.

The invention belongs to the field of stone grinding, and particularly relates to stone machining equipment. The stone machining equipment comprises a machine head shell, a telescopic shaft, a springA, a cross shaft, a connecting column, a volute spiral spring, a mounting head, a ring A, a disc base, a grinding piece and a nut, wherein an outer shaft of the telescopic shaft is in rotating fit with the machine head shell, and an inner shaft of the telescopic shaft is in circumferential rotation and axial sliding fit with the machine head shell; and a V-shaped swing rod for locking the extension limit state of the telescopic shaft drives a tensioning wheel to tension a belt through a series of transmission, so that torque transmitted from the belt and borne by the telescopic shaft is increased to the limit, and the telescopic shaft drives the grinding piece to grind the curved surface of stone with high efficiency.