14results about How to "Reduce vibration levels" patented technology

The invention provides an elevator intelligent air curtain and a semiconductor refrigeration control method. The method comprises the steps that the historical temperature and airflow distribution data in an elevator are obtained; according to historical temperature and airflow distribution data, training a temperature and airflow distribution prediction model by adopting a long-short-term memory network; acquiring real-time temperature and airflow distribution data in the elevator, inputting the temperature and airflow distribution prediction model, and predicting future temperature and airflow distribution; according to the predicted temperature and airflow distribution, an optimization algorithm is adopted to calculate the opening angle of the air curtain and the refrigeration power parameter of the refrigeration cold piece, and the optimal control strategy of the air curtain and the refrigeration cold piece is obtained with the temperature control precision and the system energy consumption as optimization targets; and parameters in the optimal control strategy are input into a controller of the air curtain and the refrigerating fins, the air speed and the air direction of the air curtain and the refrigerating power of the refrigerating fins are adjusted, and optimal control over the temperature and airflow distribution in the elevator is achieved.

The invention discloses an aero-engine thrust bearing buffering and damping structure which comprises a thrust bearing, a bearing ring cavity structure and a bearing buffering structure, a bearing outer ring is installed in a ring cavity of a fixed supporting frame, a bearing inner ring is installed on a fan rotating shaft, and a buffering body is arranged between the bearing outer ring and the ring cavity. And the bearing outer ring is provided with an instantaneous breaking boss which is radially positioned with the ring cavity. When fan blades of an aero-engine fly to lose a limit load similar to that of the aero-engine, an impact load is transmitted to the force bearing structure from the fan rotor through the bearing, the load is fused after exceeding the bearing limit of the boss, the outer ring of the bearing is allowed to move relative to the ring cavity in the radial direction, and the buffering and damping effects of a fan rotor system are achieved by extruding the buffering body. Meanwhile, due to the design of the damping structure, the critical rotating speed of the fan rotor is reduced, and the load on the bearing when the rotor passes through the critical rotating speed is further reduced. In the windmill state, the structure can effectively reduce the vibration level of the rotor, and stable operation of the bearing under the non-power condition is ensured.

The invention provides a passive nuclear power plant main pump vibration reduction method and system. The vibration reduction method comprises the steps that 1, original design parameters of a main pump are obtained, and the weight, the damping ratio and an installation fastening scheme of a vibration absorber are determined; step 2, performing a knocking test in a state that the main pump is filled with water to obtain a horizontal inherent frequency and a modal shape of the main pump; 3, according to the inherent frequency in the horizontal direction, determining the frequency and rigidity parameters of the vibration absorber; and 4, simulation verification is conducted on the vibration reduction effect of the main pump, design parameters of the vibration absorber are determined when the vibration reduction effect meets the requirement, and manufacturing, verification and installation of the vibration absorber are completed. By the adoption of the vibration reduction method, the original structure and frequency of the main pump are not changed, normal operation of the main pump is not affected, the arrangement space of the solidified nuclear power station is not changed, the construction difficulty is low, and damage to the main pump can be reduced to the maximum extent in the long-term operation period of the nuclear power station.

The application discloses a low-vibration active phase modulation composite pulse tube Stirling cryogenic refrigerator and belongs to the technical field of cryogenic refrigerators. The composite refrigerator cold finger integrates a first Stirling component as a high-temperature stage and a second pulse tube component as a low-temperature stage. The innovation is that the phase modulation unit of the second pulse tube component is composed of a second inertia tube wound and fixed in the inner circle of the gas reservoir, and the gas reservoir is integrally connected to the first cold end heat exchanger to improve the system efficiency through low-temperature arrangement. At the same time, the motion state of the compressor piston and the first displacer is monitored and cooperatively controlled in real time through the compressor displacement sensor and the cold finger displacement sensor, active and accurate phase modulation is realized, and the active vibration damper is used to perform reverse compensation according to the motion feedback of the first displacer to significantly offset the vibration output of the whole machine. The application realizes the unity of high efficiency, low vibration and high reliability, and is particularly suitable for vibration-sensitive space exploration and other application scenarios.

This utility model discloses a vibration absorber for a subframe. Relating to the field of vehicle technology, the vibration absorber includes: a mass block with a first mounting hole extending through it along a first direction, which is the axial direction of the vibration absorber; a clearance opening formed on the outer peripheral wall of the mass block; a vibration-absorbing structure fixed to the mass block, with at least a portion of the structure located within the first mounting hole; and the structure for fasteners to pass through, allowing the vibration absorber to be fixed to the subframe by fasteners. By forming a clearance opening on the outer peripheral wall of the mass block, the gap between the mass block and surrounding components is increased, preventing interference and providing a larger installation allowance for the vibration absorber. This reduces the installation difficulty and improves installation efficiency. The vibration absorber, fixed to the subframe by fasteners, reduces vibration transmission to the subframe, helping to lower in-vehicle noise and vibration levels, reduce the risk of vehicle humming, and improve vehicle comfort.

The invention provides an anti-seismic diesel engine fire pump set, which relates to the technical field of fire fighting equipment and comprises an anti-seismic diesel engine fire pump set base, a diesel engine and a fire pump, the anti-seismic diesel engine fire pump set base comprises a base frame and at least one reinforcing steel channel main beam arranged on the base frame. The diesel engine main engine is fixedly mounted on the anti-seismic diesel engine fire pump set base through the integrated base; the fire pump is fixedly installed on the anti-seismic diesel engine fire pump set base through pump feet and comprises a double-volute pump body fixedly installed on the pump feet, a pump cover connected with the double-volute pump body and located above the double-volute pump body, a pump shaft penetrating through the double-volute pump body and the pump cover and a double-suction impeller installed on the pump shaft. The anti-seismic performance of the diesel engine fire pump set is improved, and normal operation of the whole pump set under the earthquake working condition is guaranteed. According to the double-volute pump body and the double-suction impeller, the axial force generated when the impeller operates can be self-balanced, meanwhile, the radial force of the impeller is reduced, and the pump shaft operates more stably.

The utility model relates to the technical field of gear reducers, in particular to an anti-backlash gear box of a gear reducer, which comprises a connecting sleeve, an inner cavity of the connecting sleeve is fixedly connected with a spring, the bottom of the connecting sleeve is fixedly connected with an output shaft, and the surface of the connecting sleeve is fixedly connected with a driving gear. The surface of the output shaft is fixedly connected with a driven gear. The transmission device has the advantages of being efficient in transmission, low in noise and beneficial to prolonging the service life, in the actual use process, through matched use of the first thick gear, the driven gear, the first thin sheet gear, the second thick gear and the second thin sheet gear, the precise design and machining technology are adopted, gaps generated when the gears are meshed are reduced, the transmission precision and stability are improved, and the service life of the transmission device is prolonged. The anti-backlash gear box has the advantages that gear meshing clearance is reduced, impact and vibration of gears can be reduced, noise and vibration level are lowered, a machine runs more stably and quietly, and gear abrasion can be reduced by the anti-backlash gear box due to reduction of the gear meshing clearance.

The present application relates to the material transmission technical field of color sorter, disclose a kind of material guide plate with uniform material function and the color sorter of application thereof, color sorter includes the material guide plate with uniform material function, the material guide plate with uniform material function includes between installation in vibration feeding part and horizontal transmission mechanism, including plate body, the plate body gradually inclines from the side close to the vibration feeding part to the side close to the horizontal transmission mechanism;The plate body has corrugated portion, the corrugated portion has a plurality of recesses and protrusions, the protrusion and recess are alternately arranged along the length direction of the plate body;The corrugated portion has bulk material area and prevents secondary stacking area;The height of the protrusion of the bulk material area is greater than the height of the protrusion of the prevents secondary stacking area.In the present application, the material guide plate with uniform material function and the color sorter of application thereof are proposed, which can ensure the bulk material effect of material under the premise of reducing vibration level, improve the identification accuracy of color sorter.

The application discloses an unmanned helicopter vibration isolation device, which comprises a support rod, a reducer hinge, a frame hinge and an elastic element. The elastic element is arranged between a machine body and a main reducer. One support rod, one reducer hinge and one frame hinge form one vibration isolation group. The unmanned helicopter vibration isolation device comprises four vibration isolation groups. Two parallel vibration isolation groups form one pair. Two pairs of mirror images are distributed on two sides of the machine body. The support rod connects the main reducer and the machine body. Straight lines formed by two ends of the mirror image distributed support rod intersect at one intersection point. Two intersection points formed by the four vibration isolation groups form an axis. The main reducer can swing around the axis. The axial stiffness of the support rod is very high. Therefore, the linear displacement between the main reducer and the machine body is very small. The swing frequency is low. The vibration level of the unmanned helicopter is reduced. The elastic element is arranged between the main reducer and the machine body. The elastic element can isolate the vibration load generated by the main reducer and the machine body. The stability of the unmanned helicopter is improved.

The invention discloses a vibration reduction and noise reduction assembly, a structure and a saw blade base body, solves the problem that in the prior art, the control effect of vibration generated in the production, manufacturing and using process of components is poor, and has the beneficial effects of effectively absorbing vibration and reducing noise, and according to the specific scheme, the vibration reduction and noise reduction assembly comprises a plurality of sets of asymmetric star-shaped units; the plurality of groups of asymmetric star-shaped units are sequentially connected into a row or a column along the polar coordinate direction, or the plurality of groups of asymmetric star-shaped units are arranged in a multi-row and multi-column manner along the polar coordinate direction, and when the plurality of groups of asymmetric star-shaped units are arranged in a multi-row and multi-column manner, two adjacent asymmetric star-shaped units in each row are connected, and two adjacent asymmetric star-shaped units in each column are connected; the width of one side of the vibration and noise reduction assembly in the polar coordinate direction is larger than that of the other side; the asymmetric star-shaped unit is provided with at least four corners outwards in the first plane, the multiple corners are sequentially connected in the first plane, and part of the corners are arranged towards the first side of the asymmetric star-shaped unit.

The utility model discloses a height-adjustable pipeline supporting damping vibration attenuation support which comprises a clamping hoop used for tightly holding a pipeline, a damping vibration attenuation piece arranged between the clamping hoop and the pipeline, a clamping hoop support connected with the bottom of the clamping hoop, a base arranged below the clamping hoop and a height adjusting structure arranged between the base and the clamping hoop support. The height adjusting structure comprises a first height adjusting groove formed in the base, a second height adjusting groove formed in the clamp support and a locking piece connected with the first height adjusting groove and the second height adjusting groove, and the locking piece locks the first height adjusting groove and the second height adjusting groove after the height of the clamp support is adjusted. According to the pipeline support, the situation that due to the fact that the height of a pipeline cannot be adjusted, pipeline supporting is insufficient or stress is uneven, and the pipeline is affected or damaged is avoided, the pipeline support has a certain damping vibration attenuation function, and the vibration level of the pipeline can be reduced.

The utility model relates to the technical field of pump equipment, in particular to a novel air bag pump. The air bag pump comprises a pump body and a reversing valve, the left end and the right end of the pump body are provided with two compression cavities communicated with the ball valve, and corrugated pipes are installed in the two compression cavities respectively. Threaded end pipes are arranged at the positions, at the outer ends of the two compression cavities, of the pump body respectively, end covers are connected to the threaded end pipes in a threaded mode, the corrugated pipes are fixedly pressed in the compression cavities through the end covers respectively, air inlet holes and air outlet holes which are communicated with the interiors of the corrugated pipes are formed in the end covers, and the air inlet holes and the air outlet holes are connected with an air inlet pipe connector and an air outlet pipe connector respectively. The gas inlet pipe joint and the gas outlet pipe joint are connected with the reversing valve through gas-guide pipes; the inner side of the end cover is provided with a mounting counter bore communicated with an air outlet, a piston assembly is arranged in the mounting counter bore, the front end of a piston rod of the piston assembly is supported in the center of the air bag, and a plurality of damping strips are arranged between the piston assembly and the inner side of the end cover at intervals, so that the vibration magnitude is effectively reduced, pump vibration and noise are solved from the source, and the damping and noise reduction effects are good.

The invention discloses a cam disc engine in the technical field of engines, and the cam disc engine comprises a shell, outer covers are mounted at the two ends of the shell, a rotating shaft is rotatably arranged on the two outer covers, cam discs are fixedly arranged at the two ends of the rotating shaft, and four first through grooves which are annularly distributed are formed in the shell in a penetrating manner; four first through grooves are formed in the shell, stroke pieces are arranged in the four first through grooves, the two ends of each stroke piece are in transmission connection with the two cam discs correspondingly, an air exchange mechanism used for conducting air exchange on the multiple stroke pieces is arranged on the shell, each stroke piece comprises a steel sleeve arranged in the corresponding first through groove, and two piston heads are arranged in the steel sleeves in a sliding mode; the opposite ends of the two piston heads are connected with bearing fixing frames, pin rods are arranged on the bearing fixing frames, idler wheels and deep groove ball bearings are arranged on the pin rods, curved grooves and curved surfaces are constructed on the cam disc, the idler wheels are in rolling lap joint with the curved surfaces, the deep groove ball bearings are inserted into the curved grooves in a rolling mode, and the deep groove ball bearings are inserted into the curved grooves in a rolling mode. And the shell is provided with a first communication port communicated with the steel sleeve.

This invention provides a high-voltage electric pulse drill bit and a rock-breaking experimental device. The high-voltage electric pulse drill bit is positioned directly above the rock. It includes several negative electrodes, a fixing sleeve for securing the negative electrodes, a positive electrode, an insulating sleeve, a spring, an insulating handle, and a cable. The positive electrode is divided into an upper part and a lower part, which are threadedly connected. The rock-breaking experimental device includes a servo electric cylinder, a control component, the high-voltage electric pulse drill bit, a high-voltage pulse power supply, a material container assembly, an aluminum profile support, and an aluminum base. It is used to break rocks. The beneficial effects of this invention are: high rock-breaking drilling efficiency and high wellbore quality; when encountering irregular rocks, the extension and retraction of the positive electrode can make the electrode contact the rock more tightly, resulting in more effective rock breaking; reduced noise and vibration, less drill bit wear, and low energy consumption.