A brake system damping device includes a first space to which hydraulic pressure is to be applied, a second space in which a compressible medium is situated, and a first separation element configured to separate the first space from the second space. The brake system damping device further includes a third space in which a compressible medium is situated and a second separation element configured the second space from the third space. The second space is connected in medium-conducting terms to the third space by a passage configured in the second separation element. The third space and the second separation element having the passage thereof are configured by an integral component.

A helical strake pole system that includes a tubular pole having a longitudinal axis and threaded attachment points. The system further includes a helical strake fin disposed circumferentially around a portion of the tubular pole along the longitudinal axis. The system further includes couplers disposed on the tubular pole. The couplers are configured such that each coupler has a first portion with a slot configured to receive an upper portion of the helical strake fin and a second portion configured to removably coupled to a threaded attachment point of the tubular pole. In addition, each coupler is configured to position a portion of the helical strake fin substantially perpendicular to a surface of the tubular pole.

A sound absorbing structure includes a vehicle structure having a surface and at least one acoustic scatterer coupled to the surface. The at least one acoustic scatterer has a resonant frequency. The at least one acoustic scatterer has an opening and at least one channel. The at least one channel has a channel open end and a channel terminal end, the channel open end being in fluid communication with the opening. The sound absorbing structure may be configured to absorb sound waves at a certain frequency generated by a noise source. The certain frequency may be substantially similar to the resonant frequency of the at least one acoustic scatterer.

The invention relates to a device for active reduction of pressure fluctuations in a hydrodynamic system comprising a pump, a pressure fluctuation generator and at least one pressure sensor, and a controller unit. The controller unit is adapted to control the pressure fluctuation generator and to receive a pressure fluctuation signal from the pressure sensor. Furthermore, the present invention relates to a corresponding method and a pressure fluctuation generator for a corresponding device.

The disclosure relates to a valve assembly, comprising a valve body, in which a fluid channel is formed that connects a fluid inlet to a fluid outlet, wherein a preload force is applied to a closing body, which is movably mounted in the fluid channel, in the direction of a valve seat formed in the valve body, a fluid force acting on the closing body against the preload force in order to open the valve seat. The closing body is guided axially and/or radially by at least one guide ball, the guide ball being arranged between the closing body and a lateral boundary of the fluid channel.

A damping extrusion, preferably made from a thermoplastic vulcanizate (TPV), for use with a clip for piping/tubing/ducting comprises an elongate body having a side wall at, or towards each side, an upper surface that, in use, faces the clip, and a lower surface that, in use, faces the piping/tubing/ducting. The damping extrusion comprises a first protrusion extending from the lower surface at, or towards each side of the elongate body and a second protrusion extending from the lower surface at, or about a centre of the elongate body. An inner wall of at least one of the first protrusions is concave and at least one or both of the side walls of the elongate body has a concave recess.

Disclosed is a muffler for a water-cooled chiller or air-cooled of a vapor-compression or absorption refrigeration system, the muffler having: an upstream case (110) having a fluid inlet (120); a downstream case (115) connected to the upstream case at a downstream end of the upstream case, the downstream case having a fluid outlet (125); the upstream case having a plurality of axially adjacent outer muffler rings (145) and a plurality of axially adjacent inner muffler rings (155), the outer muffler rings being axially coextensive and a radially exterior to the inner muffler rings and defining a fluid inlet passage (140) therebetween, wherein the outer muffler rings and inner muffler rings are a metal mesh material.

Embodiments described and discussed herein generally relate to resonators for pressurized fluid systems, pressurized fluid systems containing resonators, and methods of reducing acoustic energy within pressurized fluid systems. In one or more embodiments, a resonator includes a first chamber containing an inlet and an outlet and a second chamber containing an inlet, an outlet, and a filter port, where the inlet of the second chamber is in fluid communication with the outlet of the first chamber. The resonator also includes a third chamber containing an inlet and an outlet, where the inlet of the third chamber is in fluid communication with the outlet of the second chamber, and where the outlet of the third chamber is configured to be in fluid communication with a pressure relief device and a fourth chamber encompassing the second chamber and in fluid communication with the second chamber by the filter port.

Embodiments described and discussed herein generally relate to resonators for pressurized fluid systems, pressurized fluid systems containing resonators, and methods of reducing acoustic energy within pressurized fluid systems. In one or more embodiments, a resonator includes a first chamber containing an inlet and an outlet and a second chamber containing an inlet, an outlet, and a filter port, where the inlet of the second chamber is in fluid communication with the outlet of the first chamber. The resonator also includes a third chamber containing an inlet and an outlet, where the inlet of the third chamber is in fluid communication with the outlet of the second chamber, and where the outlet of the third chamber is configured to be in fluid communication with a pressure relief device and a fourth chamber encompassing the second chamber and in fluid communication with the second chamber by the filter port.

A pressure fluctuation absorbing structure includes: a perforated member including a plurality of holes for absorbing pressure fluctuation on a surface thereof; and a partition member disposed on the surface of the perforated member and including a partition wall that partitions the plurality of holes in units of a predetermined number of one or more holes, and a space that is formed by the partition wall and corresponds to the predetermined number of one or more holes.