66results about How to "Reduce radial vibration" patented technology

The invention relates to the field of permanent magnet motors and discloses a high-power density permanent magnet motor. The high-power density permanent magnet motor comprises a case, a stator core,an asymmetric hybrid rotor core, permanent magnets, a shaft, windings and insulating frames, wherein a contact area is formed at the contact part of the stator core and the case and filling areas areformed in gaps between the stator core and the case; the asymmetric hybrid rotor core comprises a rotating shaft sleeve ring, a shaft hole, sectors, connection bridges and support bosses; and the adjacent sectors have different plane structures. According to the high-power density permanent magnet motor, the production process of the motor can be simplified and the structural strength of the motorcan also be improved.

A spring support (100) structure for reciprocating compressor having a frame unit (40) elastically supported inside a closed container (10); a reciprocating motor (20) fixed at the frame unit (40); a compression unit (30) having a piston (31) combined to an armature (22) of the reciprocating motor (20) and a cylinder (32) into which the piston (31) is slidably inserted to be fixed at the frame unit (40); and a spring unit (100) supporting a spring support (110) provided at the armature (22) or the piston (31) and guiding a reciprocal movement of the piston (31), wherein the spring unit (100) includes a plurality of front springs (51) supporting one side of the spring support (110) in parallel and a plurality of the rear springs (52) supporting the other side of the spring support. Since the front springs and the rear springs (52) elastically supporting both the armature (22) and the piston (31) are arranged in parallel to overlap with each other for a certain range, the horizontal length of the spring is reduced, resulting in that the compressor can be compact.

The invention discloses an adjustable type electromagnetic damping vibration absorption boring bar, and belongs to the field of mechanical machining. The problems that an existing vibration absorptionboring bar based on a damping device is prone to failing, or complex in structure and large in manufacturing difficulty are solved. The vibration absorption boring bar is characterized in that corresponding relation tables of process parameter combinations and optimal exciting current are preset in a master controller, each process parameter combination comprises rotating speed, the feeding amount, the back cutting depth amount, the workpiece material and boring cutter geometric parameters, the electromagnetic damping device is motivated by the optimal exciting current to enable the radial vibration of a bar body under the corresponding process parameter combination to be minimum, and the master controller searches the process parameter combination closest to the input actual process parameter combination and the corresponding optimal exciting current from the corresponding relation table before the vibration absorption boring bar is used for boring and machining, the master controller is further used for controlling an excitation current source to carry out excitation on an electromagnetic damping device when the vibration absorption boring bar is used for boring, and the electromagnetic damping device is motivated by the optimal exciting current to carry out vibration absorption on the bar body.

A linear compressor is provided. The linear compressor may include a shell having a cylindrical shape and a horizontal central longitudinal axis, a fixing bracket provided on an inner circumferential surface of the shell, a compressor body accommodated in the shell in a state of being spaced apart from the inner circumferential surface of the shell to compress a refrigerant, a support connected to the fixing bracket to support the compressor body, and a coupling member that connects the support to the fixing bracket. The support may include a plate spring and a buffer coupled to an edge of the plate spring. The coupling member may pass through the buffer and be coupled to the fixing bracket.

The invention relates to the field of permanent magnet motors, and discloses a built-in permanent magnet motor. The built-in permanent magnet motor comprises a case, a regular polygonal stator iron core, an asymmetric hybrid rotor iron core, permanent magnets, a shaft, windings and insulating frames. The regular polygonal stator iron core is defined by a plurality of T-shaped tooth connection yokes. The contact part of the regular polygonal stator iron core and the case forms a contact area, and a gap between the regular polygonal stator iron core and the case forms a filling area. The asymmetric hybrid rotor iron core comprises a shaft sleeve, a shaft hole, a fan area, connecting bridges and supporting protrusions and contains full-connecting-bridge-type laminations and a half-connecting-bridge-type lamination. The full-connecting-bridge-type laminations are located at the two ends of the asymmetric hybrid rotor iron core, and the half-connecting-bridge-type lamination is clamped by the full-connecting-bridge-type laminations in a wrapped mode in the axial direction. Tooth parts of all the T-shaped tooth connection yokes are wrapped with the insulating frames. The windings are wound around the insulating frames. According to the built-in permanent magnet motor, the production technology of the motor can be simplified, and the structural strength of the motor can also be improved.

The invention provides an ultra-high-speed electric spindle with an embedded cold air device. The ultra-high-speed electric spindle comprises a spindle main body, a spindle shell and the cold air device. The spindle main body and the cold air device are arranged inside the spindle shell. An air inlet is formed in the side face of the spindle shell, and an air outlet is perpendicularly formed in the lower end of the spindle shell. The cold air device is sleeved with the spindle main body and comprises a hollow chamber, and a cooling fin is arranged at the bottom of the hollow chamber. The upperend of the side, away from the air inlet, of the cooling fin is provided with a spherical groove, and the cooling fin divides the hollow chamber into a mixed gas chamber body and a swirl chamber body. The upper end of the cooling fin and the top of the hollow chamber form an air guide groove, and the mixed gas chamber body communicates with the air inlet. The air guide groove is in pipeline connection with the air outlet through a cold air pipe, a hot air port is formed in the hollow chamber, and the hot air port communicates with outside air. Cold air is low temperature compressed air, low temperature CO2, supercritical CO2 or low temperature nitrogen. The cooling effect of the electric spindle is good, chip removal is facilitated, and a needle is not prone to being broken.

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 provides a photonic crystal vibration damping coupling which comprises a first half coupling, a second half coupling, a Bragg type photonic crystal member and a local area resonance type photonic crystal member, wherein the Bragg type photonic crystal member is a cylinder composed of a first oscillator and a second oscillator; the material densities of the first oscillator and the second oscillator are different; the local area resonance type photonic crystal member comprises a base body rod, a nonmetal ring and a metal ring; the nonmetal ring wraps the base body rod; the metal ring wraps the nonmetal ring; circular holes and bolt holes are formed in flange plates of the first half coupling and the second half coupling; the local area resonance type photonic crystal member is mounted in the circular holes; the Bragg type photonic crystal member is mounted in shaft holes of the first half coupling and the second half coupling; and two ends of the Bragg type photonic crystal member are connected with a first rotating shaft and a second rotating shaft. The photonic crystal vibration damping coupling utilizes the characteristic that a photonic crystal can restrain vibration transmission and can effectively reduce torsional vibration and radial vibration of the coupling in low and medium frequency domains.

The invention discloses a vacuum rainwater drainage system and a method. The system comprises a pump room, a water colleting tank, a water inlet pipe, a water outlet pipe and a water drainage river channel, wherein one end of the pump room is connected with the water colleting tank through the water inlet pipe, and the other end is connected with the water drainage river channel through a water outlet pipe; an electrical control unit and at least one vacuum control pump group is arranged in the pump room, and the electrical control unit controls the vacuum control pump group; and a liquid level measurement unit is arranged in the water collecting tank, and the liquid level measurement unit outputs signals to the electrical unit. The system and the method have the advantages that the starting of the pump unit requires no filling water, and the working efficiency is high; and the operation vibration of the device is low, and the failure rate is low; connecting pipes can be turned around, underground structures can be avoided, and the problem that construction is hard due to underground pipe networks are complex is solved effectively; capacity of a variable frequency regulation pump can be detected through a double-acting liquid level, and the performance of the system is reliable; and after the system control is upgraded, unmanned management of a pump station can be achieved, and management and human resource costs are saved.

The invention discloses an electromagnetic expansion valve which comprises a valve body (21), a spiral guide rail device (241), a follow-up component (242), magnetic steel (27), a limiting sleeve (31) and a limiting block (25), wherein the spiral guide rail device (241) is fixed on the top wall of the valve body (21); the follow-up component (242) is arranged on the spiral guide rail device (241); the magnetic steel (27) is installed in the valve body (21); the lower end of the rail of the spiral guide rail device (241) is provided with a lower retainer; the limiting sleeve (31) is fixedly connected with the magnetic steel (27); the limiting sleeve (31) is provided with a pushing component which is used for pushing the follow-up component (242) to move along the rail; the limiting block (25) is fixedly connected to the end part of the spiral guide rail device (241), is positioned in the inner cavity of the limiting sleeve (31), and is mutually matched with the inner side wall of the limiting sleeve (31). The electromagnetic expansion valve disclosed by the invention has the advantages of higher vibration-proof performance, stable flow regulation performance, longer service life and smaller volume.

The invention belongs to the technical field of ships, in particular to a marine thrust bearing device with low-frequency vibration isolation effect, comprises an annular base fixedly mounted on the stern inner wall of the ship. One side of the annular base is provided with a first shaft sleeve, a first annular clip is rotatably mounted on the side of the first shaft sleeve far away from the annular base, a plurality of support rods are welded on the side of the first annular clip far away from the first shaft sleeve, and an end of the support rods far away from the first annular clip is welded with the same second shaft sleeve. The advantage of that invention are high practicability, Simple operation, By installing a quasi-zero stiffness vibration isolator, the problem of ''shifting axis'' of the thrust shaft is avoided and the longitudinal low-frequency exciting force of the shaft system is isolated, As that power is provided by the motor, the first annular clam block can be quicklyrotated, so that the angle of the connecting mechanism of the radial vibration isolator can be adjusted to facilitate accurate connection, and the connecting mechanism can be quickly adjusted in telescopic manner to adapt to different radial vibration isolators, and the vibration isolation effect is 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 relates to a downhole speed-increase and effect-increase tool under the effect of dual pressure cavities and a method of the tool. Friction resistance is reduced in the drilling processof a deflecting section or horizontal section of a horizontal well, and the drilling speed is increased. According to the technical scheme, the downhole impact speed-increase tool mainly comprises anupper shell, a middle shell, a lower shell, an inlet screw, a piston, a valve assembly shaft and an impact assembly shaft. The speed-increasing method includes the steps that drilling liquid transmitspressure to compress an outer compression spring and pushes an impact nut at the right end to make contact with the piston, the piston drives the impact assembly shaft to move down, and a drill bit connected to the lower portion of the impact assembly shaft to hit rock; when the rock is hit, because the rigidity of an inner compression spring is larger than that of the outer compression spring, the nut and the piston are hit to be separated under the counter-acting force of the inner compression spring, all parts return to the initial positions, and one stroke length is completed. The tool issimple in structure, the friction resistance can be reduced and the drilling speed can be improved, the radial vibration is small, the trajectory is easy to control, the drilling precision is improved, and cost is saved.

The invention discloses an explosive stress testing device based on multiple pulse tests. An upper pressing plate in the device is a circular truncated cone; and a step-shaped through hole is formed in the center of the upper pressing plate. A table-shaped impact column, a manganin sensor, a data transmission line and a lower bottom plate are sequentially installed along the step-shaped through hole of the upper pressing plate from top to bottom. The table-shaped impact column is a step-shaped cylinder; the small-diameter end of the table-shaped impact column is connected with a sleeve and a sample in a test bomb; and the large-diameter end of the table-shaped impact column is connected with a large-diameter through hole of the upper pressing plate. One end of the manganin sensor overlapsthe circle center of the lower bottom plate. The lower bottom plate is a circular truncated cone; grooves are formed in the end face, making contact with the upper pressing plate, of the lower bottomplate; and the lower bottom plate is connected with the upper pressing plate through a table-shaped through hole. According to the invention, experimental devices and test device components for multiple pulse tests are reduced; the positions of the test bomb and the test device are fixed; a phenomenon that a connecting wire is damaged in advance or the test component is separated from a sensor andthus data cannot be obtained due to vibration and other reasons in the impact process of the test component is avoided; and the test success rate and the data accuracy are improved.

The invention provides a turbine molecular pump bearing block which is applied to the field of high-speed rotating machinery such as small turbine molecular pumps. The turbine molecular pump bearing block comprises a wave spring, a rotor shaft, a rolling ball bearing, a friction plate type radial spring, a bearing block body, a bearing end cover and a damping rubber ring, the friction plate type radial spring is mounted between an outer ring of the rolling ball bearing and an inner hole of the bearing block body, made of metal materials and has elasticity by the aid of friction lugs, vibration energy is dissipated through mutual friction between the friction lugs, so that radial vibration of a bearing is reduced, thermal conductivity is high by the aid of the metal materials, heat on the bearing can be timely dissipated, radial damping and heat transfer are realized by the aid of the friction plate type radial spring, axial and radial loads of the rolling bearing are reduced, and abrasion of the bearing is decreased, so that the service life of the molecular pump is prolonged.

The invention discloses a piezoelectric ultrasonic microinjector which comprises a substrate, a screw cap and a piezoelectric ceramic vibrating module fixedly mounted at two ends of the substrate, anend cover fixed to the screw cap, bent plain end injection needles fixedly mounted on the screw cap and the end cover and a fixed bar fixedly mounted on the piezoelectric ceramic vibrating module. Thepiezoelectric ultrasonic microinjector disclosed by the invention is simple in structure, good in interchangeability of parts, easy to process and relatively low in processing cost, and the experimental cost of a microinjection experimental operation is lowered and the complex degree of the microinjection experimental operation is simplified.

The invention provides a switch reluctance motor and a vehicle power motor assembly. The switch reluctance motor comprises a stator and a rotor, the stator comprises multiple stator magnetic poles uniformly distributed peripherally, each stator magnetic pole comprises a first stator magnetic pole unit and a second stator magnetic pole unit, each first stator magnetic pole unit comprises a first stator magnetic pole root portion extending axially and multiple first stator magnetic pole tooth portions radially extending from the first stator magnetic pole root portion to the rotor, and each second stator magnetic pole unit comprises a second stator magnetic pole root portion extending axially and multiple second stator magnetic pole tooth portions radially extending from the second stator magnetic pole root portion to the rotor; the rotor comprises multiple rotor magnetic poles uniformly distributed peripherally, each rotor magnetic pole comprises a rotor magnetic pole root portion, multiple first rotor magnetic pole tooth portions and multiple second rotor magnetic pole tooth portions, the first rotor magnetic pole tooth portions extend peripherally from one side of the corresponding rotor magnetic pole root portion, and the second rotor magnetic pole tooth portions peripherally extend from the other side of the corresponding rotor magnetic pole root portion.

The invention provides a wire twisting device of a welding wire twisting machine and the welding wire twisting machine. The wire twisting device comprises a wire twisting cylinder, a plurality of welding wire reels, wire winding tubes, a wire taking device and a driving device, wherein the wire twisting cylinder is rotatably arranged on a bracket; at least peripheral welding wire reels pivotally sleeve the outer side of the wire twisting cylinder; the wire winding tubes are arranged in the wire twisting cylinder, and comprise peripheral welding wire winding tubes and a central welding wire winding tube; the wire taking device is used for guiding welding wires on the welding wire reels into the corresponding wire winding tubes; and the driving device is used for driving both the wire twisting cylinder and the welding wire reels to rotate. As the peripheral welding wire reels are arranged on the outer side of the wire twisting cylinder, the diameters of the welding wire reels are not limited by the space of the wire twisting cylinder and can be increased, the welding wires loaded on the welding wire reels are relatively heavy, the idle hour caused by the replacement of the welding wire reels can be greatly shortened, and the production efficiency can be greatly improved.

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.

A non-solvent lubricant for super-large bearings and its preparation are disclosed. The preparation is carried out by: putting refined mineral 1 / 3, polybutene and 12-oxystearic acid 1 / 5 into a still to heat to 80 - 90oC, adding lithium hydroxide to saponify, adding refined mineral 1 / 3 at 160 minus or plus 5 deg.C and heating to 210 minus or plus 2 deg.C, adding A 1 / 3 and cooling sharply, stirring, grinding twice after cooling; adding the partly-finished goods and all polylol ester, half ester of succinate derivative, acid phosphate fatty amine salt, and colloid graphite into the mixing still, stirring them uniformly and grinding by colloid mill or three-wheel mill. Its advantages include safety and environmental protection, good bearing and adhering ability, to decrease radial vibration and to extend service life of bearings.

The invention relates to a drive train module for a motor vehicle, comprising a to the crankshaft (1) connected to said flywheel (24); one connected to the crankshaft (1) operatively connected to a crankshaft starter generator, comprising a rotor (6) and a stator (7); a flywheel (24) arranged ring gear (25) and an electric starter motor (19a) with a starter pinion (19) which is engaged to rotate the ring gear with this can be brought and / or is engaged, wherein the starter pinion in a radial direction, perpendicular to the crankshaft axis (M) is offset with respect to the rotor (6) and / or the stator (7) is arranged the crankshaft starter generator.

The invention relates to the field of permanent magnet motors and discloses a permanent magnet motor. The permanent magnet motor comprises a shell, a stator core and a rotor core, wherein the stator iron core is circumferentially arranged along the inner wall of the casing, and the rotor iron core is installed in a space enclosed by the stator iron core; the rotor iron core comprises at least two full-bridge type lamination groups and at least one half-bridge type lamination group, and the laminations in the full-bridge type lamination groups comprise a plurality of full-bridge punching sheets which are connected with the first central connection bridges and are distributed along the circumferential direction; the laminations in the half-bridge type lamination groups comprise at least one separation punching sheet which is disconnected from a second central connection bridge and is distributed along the circumferential direction, and the full-bridge type lamination groups and the half-bridge type lamination groups are laminated along the axial direction, so each half-bridge type lamination group is positioned between two full-bridge type lamination groups; therefore, the adjacent sectors of the rotor core are asymmetric. The power density of the motor can be improved.

The invention discloses a radial plate type non-pneumatic tire with a bionic vibration reduction function, which comprises a tire crown, a radial plate and a rim combination ring, and the tire crown, the radial plate and the rim combination ring are sequentially arranged from outside to inside along the radial direction of the tire; wherein the radial plates are arranged in a matrix mode at equal intervals in the circumferential direction of the tire, symmetrical inwards-concave parts are arranged on the two sides of each radial plate, the inwards-concave parts are arc-shaped notches cut in the thickness direction of the radial plates, and the arc-shaped notches are inwards concave in the center direction of the radial plates; the starting points of the arc-shaped notches of the inner concave parts on the adjacent radial plates are respectively staggered from the joint ring of the tire crown and the rim. The invention has the beneficial effects that the radial exciting force is reduced through swing deformation of the radial plates, fluctuation of the exciting force is reduced, and radial vibration of the non-pneumatic tire is reduced; the vibration reduction method can be applied to radial plate type non-pneumatic tires, and the application range is wide; besides, the processing is simple and convenient, and the weight reduction of the tire is realized while the cost is saved; in addition, the asymmetric arc structure is simple, and excessive design and manufacturing difficulty and cost are prevented from being increased.

The invention discloses a noise reduction type high speed small size axial flow fan, which comprises an air drum (1), wherein a rotor assembly (2) and a stator assembly (3) are arranged in the air drum (1), the air inlet end of the air drum (1) is provided with an impeller (4) connected with the rotor assembly (2), the rotor assembly (2) comprises a rotating shaft (21), a pair of support bearings(22), magnetic steel (24) and an auxiliary bearing (25) are successively arranged on the rotating shaft (21) in an inflow direction of a fan, the support bearings (22) are connected with a steel sleeve in the air drum (1), a spring (23) is arranged between the support bearings (22), and the auxiliary bearing (25) is connected with the stator assembly (3). The noise reduction type high speed smallsize axial flow fan has the advantages of small radial vibration generated by the rotor assembly during high-speed operation, high running stability, low structural vibration noise, small dynamic andstatic interference between the impeller and an axial guide vane, good noise reduction effect and long service life.

Disclosed is a connection structure of an exhaust bearing seat for compressors and screw compressors, designed to solve the problem of large radial vibration of the existing exhaust-end bearing seat. The connection structure includes an exhaust bearing seat, an oil separation bucket, and an oil separation screen assembly all arranged at an exhaust end of a body of the compressor, wherein a tail end of the exhaust bearing seat is connected with the oil separation screen assembly, and an outer periphery of the oil separation screen assembly is provided with a vibration-reducing element, which is connected to an inner wall of the oil separation bucket. The vibration of the exhaust bearing seat is transmitted to the vibration-reducing element through the oil separation screen assembly, and then to the oil separation bucket after being absorbed and suppressed by the vibration-reducing element.