65results 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 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 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.

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 an active piston phase modulation and power recovery integrated pulse tube refrigerator supported by a column spring. A shock absorber, an active phase modulation and piston power recovery mechanism, a compressor and a cold finger of the refrigerator are arranged on the same axis, and an active phase modulation piston shaft penetrates through an inner hole of a compression piston and is connected with a refrigerator shell through a phase modulation piston column spring. A compressor motor and an active phase modulation piston motor both adopt moving coil type linear motors, so that the radial vibration is small. The compression piston and the active phase modulation piston both adopt gas bearings, the compression piston is supported by a single-side column spring, and the active phase modulation piston is used for recovering expansion work and improving the efficiency of the refrigerator. Two displacement sensors are arranged to monitor the displacement of the active phase modulation piston and the displacement of the compression piston correspondingly, the phase between the compression piston and the active phase modulation piston is adjusted through the active phase modulation piston motor, and efficient operation of the refrigerator is guaranteed. The refrigerator has the advantages of compact structure, low vibration, work recovery and high refrigeration efficiency.