8results about How to "Solving resonance problems" patented technology

The present application relates to the technical field of girder steel, and particularly relates to a thin-specification 700BL girder steel without Nb and a production method thereof; a continuous casting blank is sequentially subjected to the steps of heating, post-furnace high-pressure water descaling, rough rolling, hot coil box, flying shear, pre-rolling descaling, finishing rolling, laminar cooling and coiling to prepare the thin-specification 700MPa girder steel; the post-furnace high-pressure water descaling is provided with two groups, the pre-rolling descaling is provided with one group, and descaling is performed at the inlet of the first pass of rough rolling; the thickness of the thin-specification 700MPa girder steel is 2.5-3mm. The product performance and processing performance of the present application both meet the requirements. Through the design of the whole-line temperature process parameters and the reasonable setting of the multi-point distributed descaling process, the resonance problem of the finishing rolling mill is solved, and the production stability is improved.

The utility model relates to the technical field of vehicle empennage mounting structures, in particular to an electric empennage mounting structure and a vehicle. A hatchback door assembly of the electric tail wing installation structure comprises a hatchback door inner plate, a hatchback door outer plate and a reinforcing piece, the reinforcing piece is connected with the hatchback door inner plate in a welded mode, and an installation window is formed in the hatchback door outer plate; the driving assembly comprises a mounting part and a driving mechanism fixed on the mounting part, the mounting part is buckled on the mounting window, and the mounting part, the hatchback door outer plate and the reinforcing part are sequentially laminated and then are fastened and connected through bolts; the electric tail wing is arranged on the side, away from the hatchback door inner plate, of the hatchback door outer plate, and the electric tail wing is connected with the driving assembly. The rigid supporting capacity of the hatchback door in the electric empennage installation area is effectively improved, the resonance problem caused by structure weakening is avoided, noise and vibration in the vehicle running process are reduced, and the whole vehicle performance and riding comfort are improved.

The invention provides a harmonic reducer and a robot, and relates to the technical field of harmonic transmission. The harmonic reducer comprises a rigid gear, a flexible gear and a wave generator; the rigid gear is sleeved with the flexible gear, and outer teeth of the flexible gear are meshed with inner teeth of the rigid gear. The flexible gear is sleeved with the wave generator; a damping particle cavity is formed between the outer circumferential wall and the inner circumferential wall of the rigid wheel and filled with metal particles. Wherein the flexible gear is the fixed end of the harmonic reducer, the wave generator is the input end of the harmonic reducer, the rigid gear is the output end of the harmonic reducer, and the rotation of the rigid gear can enable metal particles to collide and rub to generate low-order damping and enable the metal particles to collide and rub with the rigid gear to generate high-order damping. According to the arrangement, the metal particles and the rigid wheel are jointly combined into the particle damping shock absorber, the integrated design of the particle damping shock absorber and the rigid wheel is achieved, generated low-order damping and high-order damping are used for absorbing vibration energy, and the problem of how to effectively suppress resonance of a harmonic reducer in the prior art is solved.

This utility model relates to the field of compressor technology, specifically disclosing a plastic coil integrated with the intake and exhaust chambers. It includes an integrated cylinder head, with an intake silencer chamber upper cover, an exhaust silencer chamber upper cover, an intake silencer chamber lower cover, and an exhaust silencer chamber lower cover integrally formed at the bottom end of the cylinder head. The bottom end of the exhaust silencer chamber lower cover is connected to and installed with a plastic coil. A Bundy tube is fitted onto the end of the plastic coil, and a compressor exhaust pipe is welded to the end of the Bundy tube opposite to the plastic coil. The intake and exhaust silencers and cylinder head of this application are integral injection molded parts, reducing installation steps and connecting parts. The plastic coil is made of common materials such as polypropylene, replacing the Bundy tube, and its inherent frequency avoids the power supply frequency commonly used in variable frequency products, thus solving the resonance problem. A 30mm Bundy tube connects the plastic exhaust chamber and the compressor exhaust pipe, solving the welding problem, and a sol-gel tank is provided at the connection point for heat fusion, preventing the coil from falling off.

The application discloses an anti-impact and anti-vibration dam body hydraulic structure, which comprises a plurality of protection units arranged in an array on a water-impingement surface of the dam body, each protection unit comprising a flexible protection plate, a buffer column, a damping and shock-absorbing assembly and a secondary shock-absorbing assembly; the flexible protection plate directly receives water flow impact and silt abrasion; the buffer column uniformly transmits the impact force to the damping and shock-absorbing assembly for preliminary energy consumption; the secondary shock-absorbing assembly is linked with the damping and shock-absorbing assembly to further dissipate the residual impact energy. The application replaces the traditional rigid anti-impact mode with a hierarchical energy dissipation system, effectively solves the problems of easy cracking, stress concentration and insufficient energy dissipation on the water-impingement surface of the dam body, can reduce the impact force transmitted to the main body of the dam body, improves the anti-impact and anti-vibration performance and durability of the dam body, and is suitable for various reservoir and riverway dam body engineering.

The low-noise compressor shell comprises a shell body, a plurality of craters are arranged on the surface of the shell body, and the craters enable the surface of the shell body to form a honeycomb pitted surface. The surface of the compressor shell is treated to form craters, so that the surface of the shell presents a honeycomb pitted surface effect, the reflection path of sound waves is increased, the penetration of noise is reduced, the inherent frequency of the whole machine is improved and the resonance problem can be effectively avoided through the characteristic that the surface of the shell is uneven.

The invention discloses a method for transforming a connector and a high-speed connector formed by the same. The method comprises the following steps: respectively coating dielectric materials on partial line segments of signal terminals in a socket end and a matched plug end of the connector, and selectively combining with two modifications proposed on a circuit board in the plug end of the connector, so as to increase the transmission bandwidth of the connector and improve the data transmission rate of the connector.

The utility model provides a kind of internal combustion engine slide valve type gas distribution structure, including lower valve body, slide valve and upper valve body, slide valve is located in upper valve body, lower valve body intermediate, transmission rod is equipped between upper valve body and slide valve, transmission rod one end is equipped with sprocket, slide valve is integrally embedded in lower valve body upper end surface, gas distribution port is opened in slide valve, lower valve body is opened in and exhaust hole one gas inlet hole one, upper valve body is opened in and exhaust hole two gas inlet hole two, exhaust hole two corresponding position with gas inlet hole one, gas inlet hole two of the utility model have Advantage: through the combination structure of lower valve body, slide valve, upper valve body and transmission rod, avoid traditional valve type gas distribution structure spring resonance problem, improve gas distribution timing precision, gas distribution phase flexible adjustment, simplify overall structure, improve gas flow efficiency simultaneously, it is favorable for fuel full combustion and the improvement of internal combustion engine power performance.