13results about How to "Avoid shock and vibration" patented technology

The invention provides a starter test run control method for an aero-engine, and relates to the technical field of engine test run control, in a test run starting time period, an output shaft of a starter is kept at a low rotating speed, a power turbine rotor is prevented from rotating over, and after the test run starting time period is over, the output shaft of the starter is kept at a low rotating speed. Taking a standard target value of the rotating speed of the output shaft of the starter as a set value, entering a rotating speed control mode, increasing the rotating speed of the output shaft of the starter, and triggering the starter to stop at a stop triggering moment; increasing the set value by considering that the rotational inertia of the output shaft of the starter is greater than the rotational inertia of a rotor of the starter and the output shaft of the starter is in an inertia uprush state; the rotating speed of the output shaft of the starter is continuously increased, the load on the output shaft of the starter is reduced, and if the rotating speed of the output shaft of the starter in an inertia uprush state cannot reach a set value, the load applied to the output shaft of the starter is continuously reduced on the basis of reducing the load applied to the output shaft of the starter; the overrun clutch inner sleeve and the overrun clutch outer sleeve cannot be meshed under the condition of high rotating speed until the rotating speed reduction rate of the starter output shaft is smaller than the rotating speed reduction rate of the starter rotor, vibration impact is avoided, and damage to the overrun clutch is reduced.

The utility model relates to the technical field of batteries, and discloses a battery pack which comprises a box body and battery packs, the box body comprises a box body main body and a beam body extending along a first direction, a containing cavity is arranged in the box body main body, the beam body is arranged in the containing cavity, and the battery packs comprise a first battery pack and a second battery pack. The first battery pack and the second battery pack are arranged on the two sides of the beam body in the second direction respectively. The connecting piece is arranged in the containing cavity and spans the beam body, the connecting piece comprises a first piece body, a second piece body and a buffer piece body, the first battery pack is connected with the first piece body, the second battery pack is connected with the second piece body, the first piece body and the second piece body are arranged at the two ends of the buffer piece body in the second direction respectively, and a plurality of grooves are formed in the buffer piece body; the groove extends in the first direction, and the concave extending direction of the groove is parallel to the third direction. The battery pack disclosed by the utility model not only can overcome the vibration impact on the whole battery pack, but also can overcome the stress caused by expansion, and meets the performance requirements of the battery pack.

The utility model discloses a circuit board with an anti-seismic structure, which comprises a lower-layer circuit board, a plurality of lower connecting elements, an upper-layer circuit board provided with a plurality of upper-layer circuit elements, a plurality of upper connecting elements, a first anti-seismic structure arranged between the lower connecting elements and the upper connecting elements, and a second anti-seismic structure arranged between the lower connecting elements and the upper connecting elements. The upper circuit element is arranged on the surface of the upper circuit element. The first anti-seismic structure is arranged between the lower connecting element and the upper connecting element, when the upper-layer circuit board is vibrated, vibration impact is absorbed through the first anti-seismic structure, and vibration transmitted to the lower-layer circuit board is reduced or even avoided, so that vibration transmission between the upper-layer circuit board and the lower-layer circuit board is reduced, and the overall anti-seismic effect of the circuit board is improved; meanwhile, the second anti-seismic structure is arranged on the surface of the upper-layer circuit element, external vibration impact is absorbed through the second anti-seismic structure, vibration transmitted to the upper-layer circuit board is reduced or even avoided, then vibration impact borne by the upper-layer circuit board is reduced, and the overall anti-seismic effect of the circuit board is improved.

The utility model belongs to the roll driving auxiliary structure technical field of roll grinder, especially relates to a numerical control roll grinder roll driving mechanism, include: positioning seat, connecting seat, gland and locking piece, be provided with positioning groove on the positioning seat, the positioning groove is the arc type structure that is suitable for the axle head outer profile of roll, the connecting seat sets up on the positioning seat, the connecting seat is coaxial distribution with the positioning seat, the positioning seat can be connected with the drive end on roll grinder head frame, the side of the gland close to the positioning seat is the arc type structure that is suitable for the axle head outer profile of roll, the gland can be along the radial of roll the axle head of roll is pressed in the positioning groove in the positioning seat, the locking piece can lock and unlock the gland with the positioning seat, compared with the prior art, the utility model solves the contact stress concentration, the back gap and inertia impact vibration and the higher problem such as cost of existing in prior art.

The present invention relates to the technical field of supports and hangers, and specifically to a spring support and hanger for thermal displacement of pipelines. The support and hanger comprises a mounting seat, a support rod is slidably connected to the mounting seat, a longitudinal elastic mechanism is connected between the support rod and the mounting seat, a circumferential elastic mechanism is connected to the end of the support rod away from the mounting seat, a support seat is fixedly connected to the circumferential elastic mechanism, a transverse elastic mechanism is fixedly connected to the support seat, two symmetrically arranged connecting pipes are sealed and slidably connected to the transverse elastic mechanism, and the connecting pipe is detachably and sealedly connected to the pipeline. The present application connects the connecting pipe to the pipeline in a detachable and sealed manner by stringing the transverse elastic mechanism between the pipelines, so that the pipeline can drive the connecting pipe to slide on the transverse elastic mechanism when thermal displacement occurs, thereby compensating for the thermal displacement generated by the pipeline, and the longitudinal elastic mechanism can buffer the vibration generated by the pipeline, which not only effectively solves the problem of thermal displacement of the pipeline, but also improves the safety and reliability of the pipeline system, ensures the safe operation of the pipeline system, and is conducive to extending the service life of the pipeline.

This invention discloses an intelligent laser cutting machine for the production of automotive metal interior parts, belonging to the technical field of intelligent laser cutting machines. The invention includes a machine body with an adjustment seat mounted on it, and a laser cutting head installed on the adjustment seat. A collection component is also installed on the machine body. An adsorption platform is fixedly installed on the machine body, and adsorption seats are uniformly installed throughout the upper surface of the adsorption platform. The inner side of the adsorption seats is divided into a first cavity and a second cavity by a fixedly installed partition plate. The first cavity and the second cavity are respectively connected to a vacuum pump and an air pump via external air pipes. A lifting seat is elastically and dynamically installed on the inner side of the adsorption seats. This intelligent laser cutting machine for the production of automotive metal interior parts can automatically position sheet metal at multiple points and in multiple modes, avoiding the impact and vibration of protective gas during the cutting of thin sheet metal, effectively improving the cutting effect, and can effectively treat the cutting fumes.

The invention relates to an electromagnetic valve for an automobile braking system and a control method of the electromagnetic valve, and belongs to the technical field of automobile braking systems.The electromagnetic valve for the automobile braking system comprises a valve element assembly and a coil assembly installed outside the valve element assembly, the valve element assembly comprises a static iron core, a movable iron core and a switch element, and the static iron core is connected with a valve seat through a main valve sleeve to form a containing cavity structure; the movable iron core and the switch element move in the containing cavity structure in the axial direction, the valve seat is arranged to be an integrated valve seat, a main valve is formed between one end of the switch element and the valve seat, and an auxiliary valve is formed between the other end of the switch element and the movable iron core. The electromagnetic valve is simple in structure and easy to manufacture, the risk that the sealing base falls off is avoided, and braking response is rapid.

This utility model discloses a planar linear bearing, including a base, rollers, and an end cap. The base has a groove, and the rollers are disposed within the groove. The groove includes a first groove, a second groove, and a transition groove. The second groove is deeper than the first groove. The first and second grooves are smoothly connected via the transition groove to form a loop. An exposure window is provided on the first groove. The end cap covers the base, shielding the groove. The end cap includes a support portion and a connecting portion. The support portion is positioned corresponding to the first groove, and the connecting portion is positioned corresponding to the second groove. The connecting portion is higher than the support portion, and the connecting portion and the support portion are connected by a transition slope. The base also has a positioning component for positioning the end cap. Its structure is simple, increases bearing load, ensures structural strength, and possesses good toughness, thus improving structural performance.

The present invention provides a seamless, non-inductive and silent bridge expansion device and an installation method thereof, comprising a first side beam (1), a second side beam (2), a belt (3), a cross-seam plate (4), a tensioning device (5), a first road surface protection device (6), and a second road surface protection device (7); the first side beam (1) and the second side beam (2) are arranged in the belt (3); the cross-seam plate (4) is arranged on the first side beam (1) and the second side beam (2); a tensioning device (5) is arranged between the first side beam (1) and the second side beam (2); the first road surface protection device (6) and the second road surface protection device (7) are arranged on the left and right sides of the belt (3) and fixed on the beam body, thereby improving driving comfort and improving noise pollution around the bridge by eliminating gaps and reducing impact vibration.

The application discloses a loom spindle motor servo control method and device. The loom spindle motor servo control method comprises the following steps: obtaining a current target rotating speed of the spindle motor; determining at least one current running state information corresponding to the current target rotating speed; determining a rotating speed setting value of the spindle motor according to the current running state information; and controlling the spindle motor based on the rotating speed setting value. The application solves the technical problem that the existing technology has a relatively large impact on the loom system.

The application discloses a traction lock device based on air transportation and air drop integrated pallet, the traction lock device is installed on the pallet, and an unlocking trigger device is further installed on the pallet and connected with the traction lock device through a pull wire; the traction lock device comprises a lock body assembly and a traction connector; the top end of the traction connector is connected with a main parachute guide parachute of a landing main parachute, the bottom end is connected with a traction parachute, and the side end of the traction connector is provided with an unlocking clamping groove with an upward opening and a tiger tooth groove with a downward opening; the lock body assembly is engaged with the tiger tooth groove of the traction connector and cooperated with the unlocking clamping groove of the traction connector; when the lock body assembly is actuated, the unlocking of the traction connector can be realized, the traction connector, the traction parachute and the main parachute guide parachute are separated, and the landing main parachute is pulled to open; the present application is based on the existing standardized pallet, and with the existing air drop parachute and other equipment, 5t-level heavy air drop can be realized, and the air transportation and air drop problem of small tonnage is solved.

The utility model relates to thermoforming mould technical field, and disclose a kind of improve heat conduction mould structure, including stepped support frame, its top is equipped with support plate, low layer is equipped with heating structure, support plate top is connected top plate by support column, the lifting plate driven by lifting motor, screw is equipped with the lifting plate below, the guide structure of guide column, limit spring composition is equipped with on mounting plate top, the limit structure of the lower limit plate and buffer cylinder of two sides is equipped with, central is the upper die plate of lifting plate connected by connecting rod and the lower die plate fixed in mounting plate, both cavity cooperation forming, heating structure is realized even heating by circulating heat medium, lifting and guide structure ensure the precision of clamping, limit structure provides overload protection, the device solves the problem that traditional mould heat conduction efficiency is low, forming precision is insufficient and equipment service life is short, with even heat conduction, movement control precision, wide application range and so on Advantage, can significantly improve thermoforming product quality and production efficiency.

This utility model relates to the technical field of plaster production equipment, and in particular to a plaster coating machine, which solves the problems of equipment vibration, positioning misalignment, and poor coating accuracy caused by frequent lifting and lowering of heavy-duty components in the prior art. A plaster coating machine includes a base and a coating machine. The coating machine is connected to the top of the base via a support frame. Guide rollers are installed on both sides of the base. Fabric is placed between the base and the coating machine's outlet. A top plate and a bottom plate are provided at the bottom of the fabric. The bottom plate is connected to the top of the base, and the top plate is positioned above the bottom plate. Its four bottom corners are connected to the bottom plate via elastic guide structures. A cylinder is fixedly connected to the center of the bottom plate, and a magnetic plate is connected to the bottom end of the cylinder. An electromagnet adapted to the magnetic plate is provided on the top of the bottom plate. This utility model uses electromagnetic repulsion to drive the lightweight top plate to support the fabric, avoiding the lifting and lowering of heavy-duty components, reducing vibration and misalignment, and improving coating repeatability and thickness consistency.