The invention discloses an adjustable pipe hanging bracket and an adjustable hanging bracket assembly for suppressing ship pipe vibration noise, wherein the adjustable hanging bracket assembly comprises the hanging bracket. The hanging bracket comprises a base plate and an adjustment bolt, and the base plate is fixedly connected with a ship body. The hanging bracket is characterized in that the adjustment bolt comprises a bolt part on the upper portion and a spherical part at the bottom, outer threads are arranged on the bolt part, a bolt hole matched with the bolt part is formed in the base plate, the adjustment bolt is installed in the bolt hole, the spherical part of the adjustment bolt is embedded into a spherical clamping groove, an opening is formed in the top of the spherical clamping groove, the diameter or width of the opening is smaller than the diameter of the spherical part, and the bottom of the spherical clamping groove is fixedly connected to the outer wall of a pipe or the top of a pipe clamp device. The adjustable pipe hanging bracket is flexible and adjustable in connecting mode, good in vibration resistant effect and suitable for the ship pipe, meanwhile, the hanging bracket assembly based on the hanging bracket discloses a pipe clamp structure matched with the hanging bracket, and the hanging bracket assembly has the advantages of further suppressing the pipe vibration noise and being convenient to install and use.

Adjustable pipe hanging bracket and adjustable hanging bracket assembly for suppressing ship pipe vibration noise

The invention discloses a dynamic vibration absorber and an air conditioner equipped with the same. The dynamic vibration absorber comprises a base, a plurality of cantilever beams, and mass blocks, the plurality of cantilever beams are arranged on the base at intervals along the circumferential direction of the base, one end of each cantilever beam is connected with the base, the plurality of cantilever beams rotate relative to the base in symmetry, the other end of each cantilever beam is respectively provided with one mass block, and the position of the mass block of each cantilever beam is adjustable in the length direction of the cantilever beam. According to the dynamic vibration absorber, the circumferential direction of the base is provided with the plurality of cantilever beams rotating relative to the base in symmetry, each cantilever beam is respectively provided with one mass block, the position of each mass block is adjustable, the structure is simple, the assembling is convenient, the vibration absorption frequency can be conveniently adjusted, and the dynamic vibration absorber can be used for reducing the vibration of household appliances such as compressors, motors, piping, and sheet metal members etc.

Dynamic vibration absorber and air conditioner equipped with same

The invention discloses a tunable multi-layer damping dynamic vibration absorber and a making and mounting method thereof and a vibration absorbing method thereof The tunable multi-layer damping dynamic vibration absorber comprises an internal ring adapting ring, a base rubber layer, an internal ring annular mass layer, an external ring annular mass layer, an external ring annular damping layer and an external ring fixing ring Two semicircular hoop components are mounted on a pipeline or a shaft system in a docked manner to form an integrated circular ring; and then the external ring fixingring is fixed on the external circumferential surface of the integrated circular ring; and by using the tunable multi-layer damping dynamic vibration absorber, the vibration of the pipeline or the shaft system is absorbed According to the tunable multi-layer damping dynamic vibration absorber, difficult problems that an existing multi-layer damping dynamic vibration absorber technology faces a shaft system high-strength vibration working environment, a low-hardness rubber material is easy to bent, deform and crack and the frequency of vulcanized and molded high-hardness rubber is hard to change are solved; a problem that the fixed frequency of existing rubber cannot realize wide band and small range fine tuning after being vulcanized is solved; and vibration absorption of a low frequencyand a high frequency and even multiple frequencies can be realized within a smaller space

Tunable multi-layer damping dynamic vibration absorber and making and mounting method thereof and vibration absorbing method thereof

The invention discloses a rectifier-type seawater pipeline muffler with a central bag body The rectifier-type seawater pipeline muffler comprises the central bag body, a perforated center cavity pipe, spherical flow-guiding bodies, perforated manifolds and a shell; the central bag body is located in the perforated center cavity pipe and arranged in a hollow mode, the two spherical flow-guiding bodies are located on the two sides of the central bag body correspondingly, and the end of the central bag body is wrapped with the spherical flow-guiding bodies; the two spherical flow-guiding bodiescommunicate through the multiple perforated manifolds, and the outer sides of the two spherical flow-guiding bodies and the perforated manifolds are sleeved with the shell; gaps between the shell andthe outer side walls of the two spherical flow-guiding bodies as well as between the shell and the outer side walls of the perforated manifolds form an outer cavity; a plurality of permeable through holes are formed in the perforated manifolds to communicate with the outer cavity so as to conduct exchanging with seawater in the outer cavity; and the perforated center cavity pipe is provided with apermeable through hole, so that the outer wall of the central bag body makes contact with the seawater in the outer cavity According to the rectifier-type seawater pipeline muffler with the centralbag body, a flow field in the pipeline can be optimized, hydrodynamic noise of a fluid in the pipe is lowered, and meanwhile, fluid pressure pulsation is reduced

Rectifier-type seawater pipeline muffler with central bag body

The invention discloses a pipeline structure, a method for optimizing pipeline vibration and a pipeline control system. The pipeline structure includes at least one adjustable section, the structure and/or orientation state of the adjustable section can be changed, and mass distribution of the adjustable section in the circumferential direction and/or axial direction are/is adjusted by changing the structural and/or the orientation state of the adjustable section. The pipeline structure includes the adjustable section of which the structural and/or the orientation state can be changed, when stress of a pipeline exceeds a predetermined value, the structural and/or the orientation state of the adjustable section are/is changed, so that fixed frequency and fixed pre-tightening force of the pipeline are changed, the vibration transmission excitation is greatly decreased, the stress of the pipeline is reduced, the service life of the pipeline is prolonged, and the reliability of the systemusing the pipeline is improved.

Pipeline structure, method for optimizing pipeline vibration and pipeline control system

The utility model relates to a tunable vibration absorbing device for pipelines of ship systems. The vibration absorbing device comprises a metal clamping ring; a hollow vibration absorbing ring is arranged in the metal clamping ring and spliced by sector-shaped vibration absorbing blocks closely attached to the inner wall of the metal clamping ring circumferentially; and each sector-shaped vibration absorbing block comprises an outer elastic component and an inner elastic component, a middle mass block is arranged between each outer elastic component and each inner elastic component, and the outer elastic component, the middle mass block and the inner elastic component are connected as a whole. During usage, the vibration absorbing device can block transmission routes of vibration when penetrated in the pipelines so as to achieve vibration absorption and isolation effects; when frequencies of flexural and longitudinal waves transmitting along the pipelines vary, the rigidity of the device is changed through loosening or tightening a bolt to change the most effective vibration abatement frequency range which is then changed to a high frequency or low frequency direction, so that the maximum vibration abatement effect is guaranteed in all obvious vibration components.

Tunable vibration absorbing device for pipelines

The utility model relates to a noise reduction device for an outlet of a ship drainage pipeline. The noise reduction device for the outlet of the ship drainage pipeline comprises a bell mouth-shaped diverging flow guide pipe. Airfoil profile rectification pillars are arranged at intervals along the peripheral direction of the bell mouth-shaped end face of the bell mouth-shaped diverging flow guide pipe and the other ends of the airfoil profile rectification pillars are connected with a top plate so as to form a radial water outlet; and a vibration absorption spreader is arranged at the position on the inner surface of the top plate, which corresponds to a bell mouth of the diverging flow guide pipe. According to the utility model, axial water flow of the drainage pipeline is converted into a radial run, axial seawater is avoided directly rushing out of a side, the flow rate and fluid jet noise are reduced, a seawater fluctuating force also can be adsorbed and noise is reduced; the vibration absorption spreader can adsorb fluid impact; and the airfoil profile rectification pillars are airfoil profile line-type structures with excellent hydrodynamic performance, formation of seawater vortex of a pipe orifice can be effectively controlled, the vortex size is controlled by regulating the number of the rectification pillars and the flow field is homogenized, so that drainage noise is further reduced. The noise reduction effect of the noise reduction device reaches about 5dB, i.e. radiation noise energy is attenuated to 30 percent of original radiation noise energy.

Wang Chunxu

Papers

Tunable vibration absorbing device for pipelines

Noise reduction device for outlet of ship drainage pipeline