62results about How to "Reduce axial vibration" patented technology

The invention provides a dynamic and static pressure composite gas bearing with an internal pi shaped air wedge groove, which relates to bearing technology, and belongs to a gas bearing with a novel structural form for supporting an ultrahigh speed rotary machine. The gas bearing is structurally characterized in that the inner surface of the bearing adopts pi shaped air wedge groove design, dynamic and static pressure composite design, and dynamic and static pressure design of a thrust surface; the thrust surface adopts spiral pressurizing groove design; and the inner surface and the thrust surface are provided with a static pressure gas supply hole respectively. The gas bearing overcomes the defects of the coupling and mutual interference between static pressure and dynamic pressure, overcomes the defect that the dynamic pressure effects at two ends of the bearing are inconsistent, not only remarkably improves the bearing capacity and rotating speed of the bearing, but also greatly reduces the axial and transverse vibration of a rotor journal, and improves the stability and reliability of a rotor system. Therefore, the gas bearing has the advantages of simple structure, high bearing capacity, stable operation and high reliability, and further widens the application range of the gas bearing.

The invention discloses a diamond drill bit suitable for hard stratum drilling, and belongs to the field of drilling. The drill bit comprises a drill bit body, a plurality of blades which extend fromthe drill bit body or are fixed to the drill bit body, water holes or nozzles. The blades are provided with scraping cutting teeth. At least one blade extends to form a strengthening base at the circumferential position of the drill bit, wherein the strengthening bases are provided with scraping cutting teeth. According to the technology, local strengthening of a cutting structure can be achieved,the hard stratum drilling work life is prolonged, and meanwhile premature failures of the cutting teeth due to vibration in the drill bit hard stratum drilling process can be reduced.

The embodiment of the invention provides a vibration reduction device of an engine cooling water pipe and a vehicle, and relates to the field of mechanical vibration reduction devices. The vibration reduction device is used for reducing vibration of an engine and propagation of liquid pulsation produced by a water pump from axial and radial directions to a vehicle body through the cooling water pipe. The vibration reduction device of the engine cooling water pipe comprises a shell, a movable vibration reduction pipe is arranged in the shell in the axial direction, a second vibration reduction ring is sleeved outside the vibration reduction pipe, a first vibration reduction ring is arranged at one end in the shell in a sealing mode, and the first vibration reduction ring is thinner than the second vibration reduction ring. According to the embodiment, the vibration reduction device is applied in the field of manufacturing of automobiles.

The invention discloses a steel structure roof comprising steel column beams and ring beams fixedly connected with the steel column beams. Top beams are connected to the ring beams and comprise beam ridges and beam arms welded to the two sides of the beam ridges. Inserting grooves corresponding to the beam ridges in a one-to-one mode are formed in the ring beams, threaded holes are formed in the inserting grooves, and first through holes corresponding to the threaded holes in a one-to-one mode are formed in the beam ridges. A bolt positioning mechanism is fixed to the outer sides of the threaded holes and comprises an outer sleeve fixed to the inserting grooves, two sliding rods are symmetrically connected to the side wall of the outer sleeve in a threaded mode, and connecting columns arein shaft connection with the ends of the inner sides of the sliding rods. First spring bodies are connected between the connecting columns and the outer sleeve, arc-shaped clamping plates are hinged to the connecting columns, and threaded parts are arranged on the inner side faces of the arc-shaped clamping plates and engaged with fixing bolts inserted into the threaded holes and the first throughholes. According to the steel structure roof, the defects in the prior art can be improved, and the mounting process of the steel structure roof is simplified.

The invention discloses an anti-seizing tool capable of avoiding drill clamping and reducing sticky slipping to solve the problem that the rock breaking efficiency is low due to clamping and slipping in the drilling process. According to the main technical scheme, an upper connector, an upper shell, an adapter and a lower shell are sequentially connected through a thread; a compression spring is mounted on a compression spring guide rod, the low end of the compression spring guide rod pushes an anti-falling connector to enable a mandrel to stretch, and the anti-falling connector is connected with a mandrel thread and axially positioned through an adapter shaft shoulder; a steel wire rope system is arranged in a left-rotation mode, the upper and lower ends of the steel wire rope system are separately fixed to the lower end of the adapter and fixed into a circular groove in the upper end of a mandrel boss, the upper and lower ends of steel wire ropes are mounted by 30-40 degrees in an inclined mode, and the steel wire ropes are in a tensional state initially; during work, drilling pressure is transferred to the mandrel through the compression spring, and torque is transferred to the mandrel through the steel wire rope system; and when the mandrel rotates backwards, the steel wire rope system retracts to enable the mandrel to compress the compression spring to axially retract so as to decrease the cutting depth of a drill bit, and the drill bit is in a rock mass in the whole process.

The invention discloses a two-way active electromagnetic control system for vibration of marine propulsion shafting. The control system is installed on the marine propulsion shafting. The marine propulsion shafting comprises an elastic coupling, a marine power device, a bearing base, a radial bearing, propellers and a thrust bearing; the above components are axially distributed along the thrust shafting, the thrust bearing is located on the bearing base for transmitting power in the marine power device to the propellers; the control system comprises a two-way active electromagnetic control assembly, the two-way active electromagnetic control assembly is mounted on the base of the thrust bearing for applying axial force in both directions according to the axial vibration, thereby reducing axial vibration caused during operation of the shafting. According to the control system in the invention, a force is applied by a two-way active electromagnetic controller mounted on the base of the thrust bearing, the unique performance of the two-way active electromagnetic controller can meet unique requirements of the propellers and is effective in controlling the shafting excitation without wear during operation, and the maintenance cost is low.

The invention discloses a high-speed elastic damping false twister spindle based on the sensor technology. The high-speed elastic damping false twister spindle based on the sensor technology comprises a mandrel, two sets of steel balls which are arranged on the radial outer side of the mandrel, and a big outer ring which is used for fixing the steel balls on the mandrel, wherein a small outer ring is arranged between each set of steel balls and the big outer ring, all the steel balls are fixed in the big outer ring through the small outer rings, a spring is arranged between one small outer ring and the big outer ring in the axial direction, and the spring axially and tightly presses the small outer rings. Due to the facts that the small outer rings are arranged between the steel balls and the big outer ring, plastic damping sleeves are arranged between the small outer rings and the big outer ring in an embedded mode to reduce radial vibration and axial vibration, and the spring which is arranged between the small outer ring and the big outer ring in a connected mode is arranged in the axial direction to eliminate the axial clearance, stable working of the high-speed elastic damping false twister spindle is ensured, and stability of spinning products is ensured. Due to the fact that a vibration sensor is in cooperation with an external circuit to carry out real-time online detection on vibration parameters of a false twister, the faults of the high-speed elastic damping false twister spindle can be predicted, and the spinning technology can also be adjusted according to the vibration parameters to achieve optimization of quality of yarn.

The invention discloses a composite diamond drill bit with a fixed buffer structure, and belongs to the field of drilling. The drill bit mainly comprises a drill bit body, multiple cutter wings and atleast two tooth palms extending from the drill bit body or fixed on the drill bit body, and at least two tooth wheels consisting of tooth wheel bodies and teeth, water holes or nozzles; the tooth wheels are rotationally connected with the tooth palms; and scraping teeth are arranged on the cutter wings. For any two adjacent tooth wheels, in the rotating direction of the drill bit, front tooth wheels are on the front side, and back tooth wheels are on the back side; at least one cutter wing is arranged in areas before the back tooth wheels and behind the front tooth wheels; a buffer base extending from the drill bit body or fixed on the drill bit body is arranged between the at last one cutter wing and the front tooth wheels; and a fixed buffer element is arranged on the buffer base. The drill bit can obviously reduce the impact vibration in the guide drilling process, reduces the impact failure of the scraping teeth, and improves the continuous drilling capacity.

The invention discloses a combined type diamond bit with a rotary buffer structure, and belongs to the field of drilling. The bit mainly comprises a bit body, multiple blades and at least two tooth palms extending from the bit body or fixed to the bit body, at least two tooth wheels composed of tooth wheel bodies and teeth, water holes or nozzles; the tooth wheels are rotatably connected with thetooth palms, scraping teeth are arranged on the blades, for any two adjacent tooth wheels, in the rotating direction of the bit, the tooth wheel with the circumferential position close to the front isthe front tooth wheel, the tooth wheel with the circumferential position close to the back is the rear tooth wheel, at least one blade is arranged on the area in front of the rear tooth wheel and behind the front tooth wheel, a buffer base extending from the bit body or fixed to the bit body is arranged between at least one blade and the front tooth wheel, and a rotary buffer element is arrangedon the buffer base. According to the bit, the impact vibration of the bit in the guide drilling process can be obviously reduced, impact failures of the scraping teeth can be reduced, and the continuous drilling capacity of the bit can be improved.

The invention discloses a multidirectional vibration damping device for a fluid conveying pipeline. The multidirectional vibration damping device comprises two parts which are the same in structure. Each part comprises an outer shell, an end cover A, minitype absorbers, an inner shell, a cover plate and a connecting plate, wherein the multiple minitype absorbers are arranged in an inner cavity of the outer shell; each minitype absorber comprises steel wires, end covers B, a cylinder and steel balls, wherein the end covers B are welded to the cylinder, the steel balls are arranged in the cylinder, and the two steel wires are welded to the two end covers B respectively; the steel wires are welded to the end cover A so that the end cover A, the outer shell and the inner shell can be welded into a whole; the cover plate seals an inner cavity formed by the end cover A, the inner shell and the outer shell and is welded to the end cover A, the inner shell and the outer shell into a whole; and the connecting plate and the cover plate are a whole. The inner shells of the two parts of the multidirectional vibration damping device are tightly attached to the outer wall of the pipeline, the connecting plates are fastened together by thread fastening pieces, and vibration attenuation for the pipeline is achieved. The multidirectional vibration damping device is simple in structure, convenient to use, capable of reducing radial vibration and axial vibration of the pipeline and suitable for space pipeline vibration attenuation.

The invention provides a coupler for a clamping shell, which comprises a first clamping shell, a second clamping shell and a bolt, wherein the first clamping shell and the second clamping shell are divided along an axial direction and are buckled with each other; four first through holes are arranged on the first clamping shell; four second through holes are arranged on the second clamping shell; the first through holes and the second through holes are continuously communicated with each other; the bolt continuously passes through the first through holes and the second through holes, so as to fixedly buckle and hold the first clamping shell and the second clamping shell; semicircular grooves which are buckled with each other are respectively arranged on inner walls of the first clamping shell and the second clamping shell, so as to form a continuous circular groove; and an elastic gasket is embedded in the circular groove. Through such a structure, the axial vibration generated between a driving shaft and a driven shaft is reduced, the service life of the coupler for the clamping shell is prolonged and the service life of rotational molding equipment is also prolonged.

The invention relates to a bearing component of a molecular pump, comprising a bearing seat (1) with an axial positioning end surface (11) and a bearing (2); the bearing (2) is matched with the bearing seat (1) for use and the end surface thereof leans against the axial positioning end surface (11) of the bearing seat (1) in a pressing manner; and a plurality of balls are arranged between the bearing (2) and the axial positioning end surface (11) of the bearing seat (1). The bearing component of the molecular pump can reduce the friction between the contact end surfaces of the bearing of the molecular pump and the bearing seat, and reduce the generation of friction heat at the bearing, thus prolonging the service life of the bearing.

The invention discloses a low-torque diamond drill bit, and belongs to the field of drilling. The low-torque diamond drill bit comprises a drill bit body, multiple blades which stretch from the drillbit body or are fixed to the drill bit body, water holes or spray nozzles and passageways. At least one blade is provided with hanging cutting teeth, at least one blade is only provided with a normalwheel unit, or bases and/or a base stretching from the blade are/is arranged at the front end and/or the rear end of the at least one blade, and normal wheel units are arranged on the bases. The working torque of the drill bit under complex working conditions can be remarkably reduced, overloading or premature failure, caused by too high torque of the drill bit, of the drill bit and matching toolsis reduced, the working stability of the drill bit is improved, and the service life of the drill bit is prolonged. Especially, during directional drilling, by means of the low-torque PDC drill bit,the adjusting time of tool surfaces during directional sliding drilling can be shortened.

The invention provides a vibration attenuation mounting structure and a compressor with the same. The vibration attenuation mounting structure is used for mounting a piece to be fixed on a bottom tray and comprises foundation feet connected with the piece to be fixed, crash pads in inserted fit with the foundation feet and fixing pieces used for fixing the crash pads on the bottom tray. The foundation feet and the fixing pieces are arranged away from the ground in a spaced mode. According to the technical scheme, the foundation feet are inserted in the crash pads, and the crash pads attenuate the axial vibration and tangential vibration of the piece to be fixed.

The invention discloses a constant-pressure and constant-torque tool for fluid well drilling. The constant-pressure and constant-torque tool comprises an upper joint, an upper shell, a middle shell, a lower shell, a lower joint, a compensation joint, a mandrel, a limiting baffle ring, a piston, a nut, a first disc spring group, a second disc spring group and a third disc spring group, the mandrel is provided with an inner through hole, a mandrel bypass hole and a limiting step, the first disc spring group and the second disc spring group are mounted in the upper shell, the third disc spring group is mounted in the compensation joint, a multi-head thread groove and an oil injection hole are formed in the middle shell, a multi-head thread groove is formed in the outer portion of the lower joint, a combined sealing groove and an oil injection hole are formed in the lower shell, and a combined sealing groove is formed in the piston. The multi-head thread groove of the middle shell is engaged with the multi-head thread groove of the lower joint, so that compression torsion replacement is achieved, the energy storage function of the disc spring groups is combined, the purpose of constant pressure and constant torque is achieved, the tool is compact in structure and powerful in function, different drilling tools can be protected according to different mounting positions, and the purpose of stable drilling is achieved.

The invention provides a hydraulic drilling and pressing device, which comprises an upper joint connected with a drill rod; an outer cylinder, one end of the outer cylinder is connected with an upperjoint, a support, an elastic piece and a cylinder body are arranged in the outer cylinder, the elastic piece is arranged between the support and the cylinder body, when the support compresses the elastic piece under different pressures, the lower end of the support seat enters different parts of the stepped hole of the cylinder body so as to transmit different drilling pressures; and a lower jointassembly connected with the drill bit and provided with a torque transmission mechanism, which on the one hand provides connection with the outer cylinder and transmits torque through the torque transmission mechanism, and on the other hand transmits drilling pressure coming from the cylinder body to the drill bit through an internally arranged flow passage. The hydraulic drilling and pressing device can improve the transmitted drilling pressure value, realize the multi-stage adjustment of the one-stroke drilling pressure, improve the drilling pressure transmission efficiency, reduce the axial vibration of the drill bit and solve the drag pressure problem in the horizontal well.

The invention discloses a double-damping thermal expansion valve with the effect of reducing vibration and noise. The double-damping thermal expansion valve comprises a valve body, a power head, an O-shaped valve, an ejecting needle, an ejecting rod sleeve, a ball seat part, a damping clamp, springs and adjusting caps, wherein spherical column-pin convex bags protruding outwards are arranged on the outer side surfaces of the lower parts of column pins under the damping clamp and are in elastic and sliding contact with step hole walls of the upper parts of adjusting-cap installing holes, so that the radial vibration of a ball seat is reduced; the ejecting rod sleeve is a mushroom-shaped nylon member; and arc-shaped convex ribs are arranged at the lower parts of four flanges of the ejecting rod sleeve and are contacted with the inner hole walls of a lower cover of the power head, axial vibration of the ball seat is reduced, the interference of vibration fields of refrigerant airflow and a car on a steel-ball valve core is reduced, and the purpose of eliminating vibration and noise in operation of an air-conditioning system of the car is achieved. In addition, the valve body is formed by machining a novel aluminum profile of which redundant materials are removed under the premise of guaranteeing enough wall thickness of all holes, so that the use amount of the materials is reduced and the cost of a product is reduced.

The invention discloses an anti-stagnation tool based on flexible rods and belongs to the field of drilling of ultra-deep petroleum wells. By the adoption of the anti-stagnation tool based on the flexible rods, the problem that the rock breaking efficiency is lowered due to the fact that a drill bit gets stuck or slides in the drilling process is solved. According to the main technical scheme, a vibration reduction assembly, an upper shell, a middle shell and a lower shell are connected in sequence through threads; the lower end of a combined disc spring pushes an anti-falling pipe to make a central pipe stretch, and the anti-falling pipe is positioned in the axial direction through an upper connector shaft shoulder of the middle shell; a flexible rod system rotates leftwards, and the upper end and the lower end of the flexible rod system are fixed in circular grooves in the lower end of the middle shell and the upper end of a central pipe boss correspondingly; the flexible rods are installed in the way that the upper ends and the lower ends of the flexible rods are inclined by 30-40 degrees and are in the stretching state initially; during operation, the drilling pressure is transmitted to the central pipe through the combined disc spring, and the torque is transmitted to the central pipe through the flexible rod system; and when the central pipe rotates reversely, the flexible rod system contracts, the combined disc spring is compressed by the central pipe to contract in the axial direction to reduce the cutting depth of the drill bit, and the drill bit is in a rock stratum all the time in the whole process.

The invention discloses a damping device for axial vibration damping and noise reduction of a shafting. The damping device mainly comprises a damper main body and a bearing seat. According to the damping device, a stepping motor drives a rotating shaft to rotate, the rotating shaft is provided with a thrust plate, the axial vibration of the rotating shaft can be transmitted to the damper main bodythrough the thrust plate, hydraulic oil in a gap of the damper main body is subjected to extrusion, an oil film damping effect is formed, so that the axial vibration of the rotating shaft is reducedor weakened, and the damping device belongs to the technical field of vibration control. Two sets of damper assemblies are arranged on the left side and the right side of the thrust plate and are usedfor transmitting and absorbing vibration in the left direction and the right direction respectively. The damping device can be widely applied to the mechanical field with axial vibration, and has theadvantages of excellent vibration damping effect, compact structure and small installation space.

A spline flywheel assembly for a dual-clutch automatic transmission, comprising a flexible flywheel disc and a spline flywheel connected to the flexible flywheel disc, the spline flywheel adopts a disc-shaped structure, and its outer ring is provided with a plurality of bosses in the circumferential direction , the boss is provided with a threaded hole, and the center of the spline flywheel disc is provided with a spline hole; the flexible flywheel disc includes a connecting plate, and the connecting plate is riveted with the flexible disc through rivets, and the outer part of the connecting plate The flange sleeve is provided with a ring gear, and the connecting plate and the flexible disk are provided with crankshaft flange connection holes. The flexible disc is connected to the dual-clutch automatic transmission through the spline flywheel, replacing the hydraulic torque converter for power transmission; under the premise of ensuring the use function, different sizes can be designed according to the structure and arrangement between the engine and the transmission The spline flywheel does not affect the overall layout of the transmission system in the body when it is equipped with different models.