30results about How to "Suppression of vibration amplitude" patented technology

The invention relates to an RWD automobile gearbox transmission error detection test bench and a comprehensive testing method, and belongs to the technical field of automobile gearbox detection. The test bench comprises a test bench device and an adjustment and supporting device. The test bench device comprises an AC drive motor, an input end elastic shaft coupler, an input end transmission error comprehensive detection device, an input end cv-joint synchronous universal shaft coupler, a gearbox input spline shaft, a tested gearbox, a gearbox output flange shaft, a first output end elastic shaft coupler, an output end transmission error comprehensive detection device, a second output end elastic shaft coupler, a two-gear reduction gearbox, an output end cv-joint synchronous universal shaft coupler, and an AC loading motor. The test bench is advantageous in that the device employs a U-shaped layout and reduces the area of an occupied land; the test bench can measure the static and dynamic transmission errors of the gearbox at the same time; the test bench employs the two-gear reduction gearbox and a sliding table mechanism, can meet the testing requirements of different types of gearboxes, and improves the universality of the test bench.

A glow plug including a center pole extending along an axial direction; a heater including a heating element capable of generating heat upon energization, which heater is connected to a leading end portion of the center pole so as to constitute together with the center pole an integrated heater/center pole member in a mechanically rigid state; a metal shell as defined herein; and a vibration preventing member for preventing vibration of the center pole, the vibration preventing member being fixed on an outer peripheral surface of the center pole at an axial position corresponding to a portion where an inside diameter of the axial hole of the metal shell is constant.

The invention provides a vibration damper of a swing blade gust generator. The vibration damper comprises a constant pressure valve, an exhaust pipe, an intake pipe, an intermediate inflatable soft board, an upper partition plate, a lower partition plate and two groups of compression springs, wherein a radial displacement gap is formed between a rotating shaft of a swinging blade and a bearing; the upper partition plate and the lower partition plate are positioned in the radial displacement gap; the intermediate inflatable soft plate is mounted between the upper partition plate and the lower partition plate; the two groups of compression springs are further located between the upper partition plate and the lower partition plate and located on the two sides of the intermediate inflation soft plate; the exhaust pipe and the intake pipe are connected with the intermediate inflation soft plate; and the constant pressure valve sets a pressure value according to the swing frequency and angleworking conditions of the swing blade and controls the air pressure in the intermediate inflation soft plate. According to the vibration damper, the bearing clearance of the rotating shaft of the gust generator can be suppressed according to the operating frequency and the operating angle of the swing blade gust generator, the vibration amplitude of the swing blade gust generator during working is effectively reduced, and the working efficiency of the swing blade gust generator is improved.

The invention relates to a testing stand for testing the transmission error of a mechanical gearbox of a front drive automobile and a comprehensive testing method, and belongs to the technical field of automobile gearbox test. The testing stand comprises a driving motor, an input shaft resilient coupler, a comprehensive input shaft transmission error detection device, an input shaft cage-type synchronous universal shaft coupler, a gearbox input spline shaft, a certain type gearbox, a first output shaft resilient coupler, a comprehensive first output shaft transmission error detection device, an arc tooth synchronous belt drive input shaft resilient coupler, an arc tooth synchronous belt transmission device, an arc tooth synchronous belt transmission output shaft resilient coupler, a first loading motor, a second output shaft cage type synchronous universal shaft coupler, a comprehensive second output shaft transmission error detection device, a second output shaft resilient coupler and a second loading motor. The testing stand is novel in structure, the first loading motor is arranged in a bias manner, the occupied space is small, and static and dynamic transmission errors of a gearbox can be measured. The testing stand has high universality.

A motor mounting device having a motor adapter that is formed substantially ring-shaped or pot-shaped and is used to receive a motor, and having a motor mount, which is used to hold the motor adapter, whereby elastic damping elements are disposed between the motor adapter and the motor mount, whereby the damping elements are formed as extruded profiles.

The invention relates to a vibration damper of an impact type scarifier. The vibration damper comprises a scarifier cross beam (1), a damping material cavity (2) and damping particles (3). The sealed damping material cavity (2) is formed in a cross beam cavity (12) of the scarifier cross beam (1), and the damping material cavity (2) is filled with the damping particles with a certain particle size. The vibration suppression and damping aim is achieved through multi-direction multi-phase friction, collisions and power consumption between the damping particles and between the particles and the wall of the damping material cavity, and compared with the prior art, the vibration damping effect is better, the vibration influence of the impact type scarifier on the structure and parts of a bulldozer can be effectively reduced, the service life of the bulldozer is prolonged, and the work environment of operation personnel is optimized.

The embodiment of the invention provides a bottom foot device and mechanical equipment. The bottom foot device comprises a containing part, a damping piece, a supporting leg, a clamping unit and a locking unit, a containing cavity is formed in the containing part, the damping piece is arranged in the containing cavity, the top end of the supporting leg extends into the containing part and can slide in the containing cavity, the clamping unit is provided with a clamping space and a deformation groove which are communicated, the supporting leg is arranged in the clamping space in a sliding and penetrating mode, and the locking unit is located on the transverse side of the supporting leg and can drive the clamping unit and the supporting leg to be switched between the locking state and the unlocking state in the rotating process. According to the bottom foo device, after automatic leveling is achieved, the clamping unit and the supporting leg are locked bu using the locking unit, the supporting leg and a machine body of the mechanical equipment are connected into a rigid whole, and even if the mechanical equipment vibrates, the machine body cannot move relative to the supporting leg,so that the vibration amplitude of the machine body is restrained, and the vibration noise is lowered.

A vibration control device comprises a vibration signal processing device and a single-shaft flexible hinge. The anti-vibration device, the first vibration detection device and the second vibration detection device are arranged on the upper plane of the single-shaft flexible hinge. The first vibration detection device and the second vibration detection device are respectively connected with the vibration signal processing device through data lines and are respectively used for detecting an initial vibration signal and a residual vibration signal of the single-shaft flexible hinge; the vibration signal processing device is used for calculating an anti-vibration signal according to the residual vibration signal, calculating an error signal according to the initial vibration signal and the anti-vibration signal, and transmitting the anti-vibration signal to the anti-vibration device; the anti-vibration device is used for generating control force on the single-shaft flexible hinge according to the anti-vibration signal, so that the vibration amplitude of the single-shaft flexible hinge is reduced; and the process is repeated until the error signal is zero, and the vibration control device stops working. An active vibration control mode is provided, and the response speed of the vibration control system is improved.

The invention relates to a method for levelling a checkered plate through a hot-rolling levelling unit, and belongs to the technical field of hot-rolling levelling units. According to the technical scheme of the method for levelling the checkered plate through the hot-rolling levelling unit, the mechanical aspect relates to model selection of a leveling machine HGC hydraulic cylinder and model selection of rolling line adjusting device; the electrical aspect comprises optimization of transmission control system speed slope parameters, optimization of a HGC screwdown control system PI adjuster and a proportionality coefficient and filtering treatment in pressure sensor feedback value; and an original single sine negative convexity or multi-power negative convexity roll shape of a working roll is changed, and an experience curve is used. The method for levelling the checkered plate through the hot-rolling levelling unit has the beneficial effects that the problem of levelling the checkered plate through the hot-rolling levelling unit is solved, meanwhile, the production efficiency is also improved obviously, the levelled checkered plate product quality accords with a technical index requirement, and good economic benefits are created for an enterprise.

The invention discloses a vibration suppression device and suppression method after hot galvanized strip steel gets out of a zinc pot. The vibration suppression device comprises an upper vibration suppression roll, an upper transverse movement mechanism, a lower vibration suppression roll, a lower transverse movement mechanism, an upper laser range finder, a lower laser range finder, an encoder and a PLC control system. The laser range finders are used for feeding back the surface position of the strip steel in real time. The PLC control system is used for carrying out difference calculation on the actual measured distance of the laser range finders and the set distance to determine the actual vibration amplitude of the strip steel. When the vibration amplitude of the strip steel exceeds aset threshold value, the transverse movement mechanisms drive the vibration suppression rolls to get close to the strip steel to suppress the vibration amplitude of the strip steel and limit the vibration amplitude within the set threshold value. The encoder is used for feeding the running speed of the strip steel in real time and controlling the rotating speed of the vibration suppression rollsto ensure that linear speed of the roll surfaces of the vibration suppression rolls is in line with the running speed of the strip steel and protect the surface of the strip steel against scratches. The vibration suppression device remarkably reduces the vibration amplitude of the strip steel, ensures the thickness uniformity of a galvanized layer of the strip steel, protects the surface of the strip steel against scratches and meets the requirements for production of high-quality galvanized strip steel.

The invention provides a low-vibration motor with a vibration-isolation sleeve structure, comprising: a motor, a stator vibration-isolation sleeve and a rotor vibration-isolation sleeve; the stator vibration-isolation sleeve is fixed on the inner wall of the motor base, and the stator iron core; the rotor vibration isolation sleeve is installed in the bearing chamber of the motor end cover, and the inner wall of the rotor vibration isolation sleeve is embedded in the bearing. The stator vibration isolation sleeve is made of damping alloy material, which is cylindrical and longer than the length of the stator core in the axial direction of the motor; the rotor vibration isolation sleeve is made of damping alloy material, with an outer flange on the edge, and the surface of the flange is There are screw holes; there is also a bearing block in the rotor vibration isolation sleeve. The invention adds a vibration isolation sleeve structure to the vibration transmission path of the motor to reduce vibration transmission and effectively reduce vibration noise. The installation of the device structure is firm and reliable, and does not affect the mechanical performance of the motor; the structure of the stator and rotor of the motor is not changed, and the electrical performance of the motor is not affected; the installation is convenient, the replaceability means strong versatility, and it is easy to implement.

The invention provides a multi-stage excitation double-cylinder magnetorheological damper and a control method thereof. The damper comprises a base, an inner cylinder, an outer cylinder, a guide sealing assembly, a piston assembly and a magnetic circuit assembly. Openings in the two ends of the outer cylinder are plugged through a guide sealing assembly and a base respectively. And the inner cylinder is coaxially arranged in the outer cylinder. And a runner cavity is formed between the outer wall of the inner cylinder and the inner wall of the outer cylinder. The magnetic circuit assembly is arranged in the flow channel cavity. And when the coil is electrified, the circulation channel I adjacent to the coil is converted into an active flow gap. Positive electrodes of the (N-1) coils are independently led out from the base. And the (N-1) coils share the negative electrode. And the negative electrodes of the (N-1) coils are connected in parallel and then are led out from the base. The constant voltage source excites the coil. According to the damper, the controllable damping force range of the magnetorheological damper is greatly expanded. The magnitude of the damping force is controlled by controlling the number of the active flow gaps by adjusting and controlling the applied magnetic field, and combination of different damping force control ranges is achieved.