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

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 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 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 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).

A shut-off flap with a flap-shaped shut-off element, which is supported within a housing in such a way that it can swivel around a rotation axis and which contains a flap disk staggered relative to the rotation axis and lateral hubs to hold two drive shafts which are supported in such a way that they can rotate in the housing. In order to make possible an improvement of the throughflow and a reduction of the actuation torque, flow deflection elements are located on the two hubs.