69results about How to "Improve the vibration damping effect" patented technology

The invention discloses a suspension damping structure for engineering vehicles, relates to the technical field of engineering machinery and solves the technical problems of poor damping effect and easy damage in the prior art. The suspension damping structure comprises a front suspension damping structure and/or a rear suspension damping structure; the front suspension damping structure comprises a front steel plate spring assembly and a front damper; the front steel plate spring assembly comprises a front end support, a rear end support, a fixing bolt and at least two front steel plate reeds stacked together; the front end support and the rear end support are respectively and fixedly connected with a frame of the engineering vehicle; the thickness of each front steel plate reed is gradually reduced from the middle of the front steel plate reed to the direction of any end of two ends of the front steel plate reed in the length direction; and a gap is remained between every two adjacent front steel plate reeds in the front steel plate reeds stacked together. The suspension damping structure for the engineering vehicles are used for improving the damping effect and reliability of the engineering vehicles.

The invention relates to a laundry treating apparatus which includes a cabinet, a drum accommodated in the cabinet, a tub accommodating the drum, and a dynamic absorber provided to absorb oscillationof the cabinet. The dynamic absorber includes a support plate coupled to the cabinet, mass bodies movably provided on the support plate, and sliders arranged between the mass bodies and the support plate, and the sliders can enable the mass bodies to perform reciprocating motion on the support plate while attenuating due to frictional force.

A damper apparatus (10Y) includes a first inner spring (SP1') for transmitting torque between a drive member (11Y) and an intermediate member (12Y), a second inner spring (SP2') for transmitting torque between the intermediate member (12Y) and a driven member (15Y), and a rotational inertial mass damper (20Y) having a sun gear (22) as a body of mass that rotates according to the relative rotation between the drive member (11Y) and the driven member (15Y), the rotational inertial mass damper (20Y) being provided in parallel with a torque transmission path (TP) that includes the intermediate member (12Y) and first and second inner springs (SP1, SP2), and the damping ratio Zeta of the intermediate member (12) being a value of less than 1, as determined on the basis of the inertia moment (J2) of the intermediate member (12Y) and the rigidities (k1, k2) of the first and second inner springs (SP1', SP2').

A golf club head with vibration attenuation and very nice beating sound features that there is a hollow structure in at least one of neck, face, bottom, crown and side part, which is made of the fibre reinforced plastics and metal.

A damper device (10) includes: a dynamic damper coupled to a first intermediate member; and first and second inner springs (SP21, SP22) which operate in series with each other and which are straight coil springs interposed between a second intermediate member (15) and a driven member (16) so as to restrict an outward displacement of the springs (SP21, SP22) at the respective ends thereof in a radial direction of the damper device (10). A gap is formed between bodies (Bsp) of the first and second inner springs (SP21, SP22) and a spring contact portion (163) of the second intermediate member (15) or the driven member (16).

The invention provides a screw type compressor, which is capable of improving vibration attenuation. A rod-shaped member (19) loosely inserted into a plurality of heavy hammers (8) is equipped on a motor shell (13) in a projecting way. At least one of the multiple heavy hammers (8) is combined with a frame (16). And at least one of the multiple heavy hammers (8) is not combined with the frame (16). When the motor shell (13) is vibrating, the rod-shaped member (19) collides with the heavy hammers so as to disperse the vibration energy. Furthermore, relative displacement which is suitably present between the heavy hammer (8a) combined with the frame (16) and another heavy hammer (8) not combined with the frame in a low-amplitude area leads to sliding friction between the above two heavy hammers. The vibration energy is thus further dispersed.

A damper device 10 includes: a drive member 11 to which torque from an engine EG is transmitted; a driven member 16; a first intermediate member 12; a second intermediate member 14; a first outer spring SP11 for transmitting torque between the drive member 11 and the first intermediate member 12; a second outer spring SP12 for transmitting torque between the first intermediate member 12 and the driven member 16; a first inner spring SP21 for transmitting torque between the drive member 11 and the second intermediate member 14; a second inner spring SP22 for transmitting torque between the second intermediate member 14 and the driven member 16; and an intermediate spring SPm for transmitting torque between the first intermediate member 12 and the second intermediate member 14.

The invention provides a method for designing a rolling mill vertical vibration suppression controller based on self-adaptive fuzzy backstepping, which comprises the following steps of: firstly, establishing a four-degree-of-freedom mechanical-hydraulic coupling nonlinear model of rolling mill vertical vibration according to a dynamic principle of a rolling mill vibration system; setting the vertical vibration displacement of the working roll of the rolling mill to be close to zero as a control target according to the condition that the vertical vibration of the rolling mill causes the workingroll to jump up and down; and finally, in combination with a nonlinear model of rolling mill vertical vibration, selecting a proper Lyapunov function, solving a virtual controller, an actual controller and an adaptive law which enable V (t) to tend to zero when t tends to be infinite, and finally obtaining the predetermined performance controller design method for suppressing rolling mill vertical vibration. According to the method, the rolling mill vertical vibration nonlinear model more conforming to the actual working condition is established, the characteristic that the servo valve has adead zone and the limitation on roller vibration displacement are considered, the rolling mill vertical vibration suppressor is designed, vertical vibration occurring in the high-speed rolling processis rapidly and actively suppressed, and the stability of the high-speed plate and strip rolling process is guaranteed.

A damper device (10) is configured in such a manner that a first torque transmission path (P1) and a second torque transmission path (P2) which is provided in parallel with the first torque transmission path (P1) are arranged between a drive member (11) and a driven member (16). The first torque transmission path (P1) includes a first spring (SP1) for transmitting torque between the drive member (11) and the driven member (16). The second torque transmission path (P2) includes: first and second intermediate members (12, 14); a second spring (SP2) for transmitting torque between the drive member (11) and the first intermediate member (12); a third spring (SP3) for transmitting torque between the first intermediate member (12) and the second intermediate member (14); and a fourth spring (SP4) for transmitting torque between the second intermediate member (14) and the driven member (16).

The invention provides a vibration damping device and a design method therefor. The vibration damping device is disposed in an oil chamber and includes: a support member that rotates integrally with arotating element around the center of rotation of the rotating element to which the torque from an engine is transmitted; a restoring force generation member that is connected to the support member and can pivot along with the rotation of the support member; and an inertial mass body that is connected to the support member via the restoring force generation member and pivots around the center ofrotation in conjunction with the restoring force generation member, along with the rotation of the support member. The order of the vibration damping device is larger than the sum of the excitation order of the engine and an offset value taking into consideration the effect of oil inside the oil chamber, and a reference order, which is a convergence value of the order of the vibration damping device operating in the oil chamber when the amplitude of the vibration of the input torque transmitted to the rotating element becomes smaller, becomes larger than the excitation order.

A starting device (1) comprises a damper mechanism (10), a single-plate lock up clutch (8) that can execute lock-up to couple a front cover (3) and an input shaft of a transmission via the damper mechanism (10), and a centrifugal pendulum vibration absorber that comprises a driven member (15) of the damper mechanism (10) as a supporting member and a plurality of pendulum mass bodies (21). A lock up piston (80) of the lock up clutch (8) and a driving member (11) of the damper mechanism (10) are coupled to each other at a position more to the inside in the radial direction than the plurality of pendulum mass bodies (21) so as to rotate unitedly.

A vibration-damping device 20 includes crank members 22 that are linked to a driven member 15 via first linking shafts A1 and that are capable of swinging about the first linking shafts A1 along withthe rotation of the driven member 15, and an inertial mass body 24 that is linked to the driven member 15 via the crank members 22 and connecting rods 23 and that swings around a rotational center RCin tandem with the crank members 22 along with the rotation of the driven member 15. As part of the centrifugal force acting on the crank members 22 along with the rotation of the driven member 15, certain force components, which act in a direction orthogonal to a direction leading from the center of a first linking shaft A1 to a center of gravity G, constantly act on the crank members 22 as return force for returning the inertial mass body 24 to the center of the range of swinging, and these force components reach a maximum when the inertial mass body 24 is positioned in the center of the range of swinging.

This damper device includes an input element through which torque from an engine is transferred, an output element, a first intermediate element, a second intermediate element, a first elastic body that transfers torque between the input element and the first intermediate element, a second elastic body that transfers torque between the first intermediate element and the output element, a third elastic body that transfers torque between the input element and the second intermediate element, a fourth elastic body that transfers torque between the second intermediate element and the output element, and a fifth elastic body that transfers torque between the first intermediate element and the second intermediate element. The third and fourth elastic bodies are positioned to the outside of the first and second elastic bodies in a radial direction of the damper device. The fifth elastic body is positioned to the outside of the first and second elastic bodies in the radial direction and with agap between the fifth elastic body and the third and fourth elastic bodies in an axial direction of the damper device. The fifth elastic body, when viewed from the axial direction, at least partiallyoverlaps with the third and fourth elastic bodies in the radial direction.

The invention belongs to the field of functional materials, and in particular relates to a magnetic damping composite material and a preparation method thereof. The material comprises the following components in percentage by weight: 8 to 10 percent of kaolin, 8 to 11 percent of magnesium oxide, 24 to 28 percent of waste cement cerium-manganese composite oxide composite body, and the balance of phenolic resin. The invention aims to provide a magnetic damping composite material, which has the characteristic of high maximum damping factor. The invention also aims to provide the preparation method of the magnetic damping composite material, which has a simple process, and is low in production cost and applicable to industrial production.

The invention belongs to the field of functional materials and in particular relates to a combined regenerated substance and magnetic compound material and a preparation method thereof. The material comprises the following components by weight percent: 2%-5% of chromium sesquioxide, 11%-15% of bentonite, 20%-25% of a waste glass iron-praseodymium magnetic oxide complex body and the balance of phenolic resin. The material provided by the invention is pollution-free and relatively higher in damping performance and has a vibration attenuation effect. The preparation method provided by the invention is simple in process, low in production cost and suitable for industrial production.

The invention belongs to the field of organic materials, and in particular relates to a magnetic compound polymer plastic alloy material and a preparation method thereof. The material comprises the following components in percentage by weight: 10 to 15 percent of silicon dioxide, 8 to 15 percent of vanadium oxide, 22 to 25 percent of blast furnace slag niobium-manganese complex oxide composite body, and the balance of urea-formaldehyde resin. The invention aims to provide the magnetic compound polymer plastic alloy material, which has a high damping function. The invention also aims to provide the preparation method of the magnetic compound polymer plastic alloy material, which has a simple process, and is low in production cost and applicable to industrial production.