30results about How to "Reduce vibration risk" patented technology

A centrifugal pump comprises a housing as well as a rotor which is arranged so as to be able to rotate about an axial axis of rotation in the housing. The rotor is provided with at least two rotor blades, each of which extends substantially radially with respect to the axis of rotation between a radial outer end and a radial inner end. The outer ends of at least two rotor blades are at radially different distances to the axis of rotation.

An ink transfer device which can be clamped on a rubber covered cylinder in a printing press includes a rubber blanket for transferring ink from a printing forme to a printing material, the blanket having a leading end and a trailing end which are separated by a non-ink transferring gap when the device is clamped on the cylinder; a carrier element fixed to the rubber blanket; and a pair of fixing elements for clamping the blanket on the cylinder, the fixing elements being positioned on the carrier adjacent to respective ends of the blanket. In order to minimize the non-ink transferring gap, the fixing elements and the carrier element are formed as separate subassemblies which are joined together.

The invention discloses a valve disk 1 with a disk-like valve body 2, which has a front 3 with two protruding hubs 4 and a back 6 opposite the front 3. In order to permit improved flow around the valve disk and reduction of eddies on the outflow side, arc-like recesses running along an inside surface 10 of both hubs 4 are arranged on the front 3 of valve body 2 to deflect the flow around hubs 4.

The invention provides a modular water-jet propulsion steering and backward navigation mechanism, and relates to the technical field of ship propulsion. The mechanism comprises a steering and backwardnavigation mechanism bracket for fixing a water-jet propulsion steering and backward navigation mechanism; a rudder which is connected with the steering and backward navigation mechanism bracket through a first pin shaft and is used for moving left and right around the first pin shaft under the driving of a steering oil cylinder arranged in the rudder, so that the jet water flow is reversely folded towards the side to realize steering; a reversing vehicle door which is connected with the rudder through a second pin shaft and used for achieving the ahead function in the open state and enablingthe jet water flow to be reversely folded towards the ship bottom in the closed state so as to achieve backward navigation; and an auxiliary rudder plate which is installed on the rudder through a fastener and used for rotating along with the rudder so as to improve the rudder effect. Through modularization of the water jet propulsion steering and backward navigation mechanism, the specificationnumber of the mechanism is reduced, the design and machining cost is reduced, and the machining period is shortened; the assembling and disassembling difficulty is effectively reduced; the processingdifficulty and the rejection rate of the guide vane body are reduced; and product reliability is improved.

The invention discloses a rotor assembly of a gas compressor test part and the gas compressor test part. The rotor assembly comprises a gas compressor blade disc used for increasing the gas flow speedand gas pressure, a balance disc used for balancing axial acting force and arranged coaxially with the gas compressor blade disc, a center pull rod used for tensioning the rotor assembly and transmitting axial force, a power input shaft used for transmitting axial force of torque and fixedly connected with the balance disc and a supporting structure used for supporting the rotor assembly on a casing. The center pull rod penetrates through and locks the gas compressor blade disc and the balance disc. The supporting structure comprises a first supporting part and a second supporting part, the first supporting part and the second supporting part are arranged at the front end and the rear end of the gas compressor blade disc correspondingly, and the balance disc is arranged behind the secondsupporting part. By means of the structural design of the rotor assembly, the supporting span of a rotor is obviously reduced, bending deflection generated when the rotor assembly rotates is reduced,the rigidity and strength of the rotor assembly are increased, and the critical rotation speed margin of the rotor assembly is improved.

The invention discloses a mute shockproof radiator structure, and the structure comprises a driving shaft, a driving wheel, a driven shaft, a reverse driven group, a forward driven group, a transmission belt, a sound box housing and a miniature motor. The driving shaft and the driving wheel, the driven shaft, the reverse driven group, the forward driven group, the transmission belt and the miniature motor are installed in the sound box housing, and the driving shaft and the driven shaft are perpendicularly disposed. The driving shaft is mounted on the main shaft of the miniature motor, and thedriving wheel is mounted on the driving shaft. The reverse driven group and the forward driven group are mounted on the driven shaft, and the transmission belt is mounted on the driving wheel. The reverse driven group is aligned with the tangent plane of the upper edge of the driving wheel, and the forward driven group is aligned with the tangent plane of the lower edge of the driving wheel. Thestructure irons out the defects that the effective heat dissipation cannot be achieved under a mute condition and cannot be achieved under the shockproof condition and the effective silencing and shock resistance cannot be achieved during heat dissipation; the structure enables the three optimal effects to be optimized, and a mute shockproof heat dissipation triple-optimization structure for a sound box is achieved.

A valve (1) has a valve housing (2) with an inlet (3) and outlet (4), a valve body (5), provided with an essentially cylindrical passage (6) and pivotally mounted in the housing (2). Essentially plane walls, defining chambers between them and provided with through openings (11; 11') are arranged in the passage (6). Upon opening the valve the inlet connects solely with one chamber, which via wall openings and intermediate chambers connects with the chamber opposite and the latter with the outlet. During the successive opening sequence of the valve more and more chambers and finally all chambers are made to connect with the inlet and the outlet respectively. The device has at least one pair of intersecting walls (8a, 8b; 9a, 9b, 10a, 10b). These are located in the passage (6), so that two opposing chambers (K1, K4; k1, k9) situated nearest to the inlet (3) and the outlet (4) respectively lie symmetrically in relation to a center plane, in which the central axis (6a) of the passage is situated during the rotational movement vice-versa (5) between the opened and the closed position and vice-versa.

The present invention involves a scripture machine. Specifically, a scholarship (1) is given, and it has a needle comb (2) and a sliding comb (3).Combing drive mechanism (8 13) is controlled by the main axis.People want to give an appropriate scripture machine that can work with high productive forces.For this reason, the sliding combing driver structure is the direct drive mechanism of the sliding comb.

The invention relates to a unit support platform used for model tests of pumped storage dynamic characteristics, comprising a frame, an umbrella support, a universal coupling, a detachable flywheel installed on the shaft of a water pump turbine, a model connecting plate, a fixed Standoffs, draft tube supports and grid bases. The invention can not only ensure the operation stability of the detachable flywheel at high mechanical speed, but also improve the angular compensation ability of the shaft system, reliably transmit torque and motion, and realize high efficiency and stability of the pump turbine shaft and the doubly-fed motor shaft transmission. The invention has a compact structure, takes up little space, has the characteristics of reinforcement, buffering and vibration reduction, and can effectively reduce the operation risk of the seawater pumped storage dynamic characteristic model test. The invention has the characteristics of buffering, damping and improving the dynamic performance of the shaft system, and is suitable for the dynamic characteristic model test device of the pumped energy storage unit with high mechanical speed and large moment of inertia and the dynamic characteristic of the conventional hydropower generating unit.

The invention discloses a stabilizer, which comprises a supporting shell, an abutting shoe and a telescopic driving part. The first end of the supporting shell is fixedly connected with the steel pipe ring; the abutting shoe is nested with the opening provided at the second end of the supporting shell; the telescopic driving part is arranged between the supporting shell and the abutting shoe. When the telescopic driving part is activated, the telescopic driving part will drive the abutment shoe against the support shell to press against the well wall until the abutment shoe is against the well wall, so that the steel pipe ring is fixed relative to the well wall, realizing the fixation of the steel pipe ring and reducing the steel pipe ring The risk of reverse torque rotation will be reduced, thereby reducing the risk of vibration of the shaft boring machine, and the safety will naturally be improved. Therefore, the stabilizer provided by the present invention is beneficial to improving the safety of the shaft boring machine. The invention also discloses a shaft boring machine including a stabilizer.

The invention relates to a fixing structure of switching devices and relates to a power conversion device. The fixing structure comprises a bottom plate, a switching device positioning plate and a cover plate; the bottom plate and the switching device positioning plate are assembled together; the switching device positioning plate comprises a plurality of spacers; the spacers are located on the side, away from the bottom plate, of the switching device positioning plate; a plurality of switching device pin accommodating grooves are formed in the main body part of the switching device positioning plate between two adjacent spacers and are used for accommodating pins of switching devices; the cover plate is pressed on the switching device positioning plate so as to press the pins of the switching device in the switching device pin accommodating grooves, and therefore, a plurality of switching devices form a switching device module.

The knitting machine (1) has a machine frame (2), where a knitting tool bar (3) is pivotable by a pivot drive relative to the machine frame. The knitting tool bar is connected to the machine frame via a flexural joint arrangement (6). The flexural joint arrangement has multiple bending joints distributed over the length of the knitting tool bar, where the bending joints have flat springs made of fiber reinforced plastic.

The invention provides a modularized water-jet propulsion steering reversing mechanism, which relates to the technical field of ship propulsion, and includes a steering reversing mechanism bracket for fixing the water-jet propulsion steering reversing mechanism; It is connected to the support of the navigation mechanism, and is used to move left and right around the first pin shaft under the drive of a steering cylinder built in the rudder, so that the jet water flow is reversed to the side to realize steering; the reversing door is connected to the rudder through a second pin shaft, It is used to realize the forward steering function when it is in the open state, and to make the jet water flow reverse to the bottom of the ship to achieve reverse sailing when it is in the closed state; the auxiliary rudder plate is installed on the rudder through fasteners, and is used to rotate together with the rudder to lift the rudder effect. The invention reduces the number of specifications of the steering and reversing mechanism through water jet propulsion, reduces design and processing costs, and shortens the processing cycle; effectively reduces the difficulty of assembly and disassembly; reduces the processing difficulty and scrap rate of guide vanes ; Improved product reliability.

The method involves fixing an outside mirror (1) of a motor vehicle such that a distance between the center of a convex spherical mirror of the mirror (1) and a median of a segment, connecting the eyes of a driver of the motor vehicle, projected on a longitudinal axis of the vehicle is in the order of twenty to forty centimeters, where the convex spherical mirror is made of glass or plastic material.

The invention relates to a reaction fin in front of a propeller, which is arranged on a conventional right-handed single propeller ship, and belongs to the technical field of hull energy saving equipment. When the reaction fin in front of the propeller is seen from the rear side of the propeller, a stern at the left side of a longitudinal central line of a propeller hub (6) is provided with a first fin (1), a second fin (2) and a third fin (3) from the top to the bottom and the right side of the longitudinal central line of the propeller hub (6) is provided with a fourth fin (4), wherein an included angle alpha between the first fin and the longitudinal central line is in the range of more than or equal to 46 degrees and less than or equal to 53 degrees; an included angle beta between the second fin (2) and the horizontal direction is in the range of more than or equal to 1 degree and less than or equal to 8 degrees; an included angle chi between the third fin (3) and the longitudinal central line is in the range of more than or equal to 37 degrees and less than or equal to 44 degrees; and an included angle delta between the fourth fin (4) and the horizontal line is in the range of more than or equal to 82 degrees and less than or equal to 89 degrees. Due to the adoption of the structure, three of the four fins are distributed in a low-value region, i.e. a high-speed region, of a wake field, so that the adverse effect of the resistance of the fins on the flowing in a low-speed region is reduced, and the fins distributed in the high-speed region are also beneficial to the homogenization of wake when ensuring the wake field in front of the propeller to rotate in advance.

The invention relates to a warp knitting machine, in particular to a warp knitting machine (1) having a needle bar (2) which is driven by a main shaft through a needle bar drive (8-13), and a slide bar (3) which is driven by the main shaft through a slide bar drive. One would like to specify a cost-effective warp knitting machine which can work with high productivity. For this purpose, the slide bar drive is designed as a slide bar direct drive (14, 15).