The present invention relates to a linear compressor. The linear compressor according to an aspect of the present invention includes a spring axially elastically supporting a driving assembly. The spring includes a spring body axially extending, a front spring link forming an end of the spring body by extending from a side of the spring body, and a rear spring link forming the other end of the spring body by extending from the other side of the spring body. Any one of the front spring link and the rear spring link is fixed to the driving assembly and the other one is fixed to a supporting assembly.

A belt guard for an air compressor that includes an air compressor silencer. The guard includes a housing that includes a front cover and a back cover, and an accommodation portion. The air compressor silencer is provided inside the housing in the accommodation portion, where the air compressor silencer includes a spirally shaped silencer core, and the spirally shaped silencer core includes at least one spiral chamber comprising a core inlet and a core outlet. Additionally, a compressor installation that includes a motor, a compressor, a belt connected to a compressor shaft of the compressor element and a motor shaft of the motor, and a belt guard that includes a front cover and a back cover, and an accommodation portion, where the compressor silencer is provided inside the housing in the accommodation portion.

The present invention refers to a fluid-conducting pipe of a reciprocating compressor made of polymeric material, and further including at least one vibrational energy dissipation element, basically, aiming at solving the problem of noise and the breakage of the pipe deriving from the resonance of the discharge piping in reciprocating compressors operating at high angular speed regimes.

The present invention relates to a linear compressor. The linear compressor according to an aspect of the present invention includes a spring axially elastically supporting a driving assembly. The spring includes a spring body axially extending, a front spring link forming an end of the spring body by extending from a side of the spring body, and a rear spring link forming the other end of the spring body by extending from the other side of the spring body. Any one of the front spring link and the rear spring link is fixed to the driving assembly and the other one is fixed to a supporting assembly.

In situations where a vacuum system is suddenly overloaded, there is a risk of mechanical damage being sustained, for example, bearing damage, gear slippage or rotor and/or stator collisions. Sudden overloads can also lead to electrical damage, for example, over-currents or power surges. Therefore a pressure regulating apparatus is provided for use in a vacuum pumping system having an inlet, an outlet and a conduit interposed between, and in fluid communication with, the inlet and the outlet, wherein the cross-sectional area of the conduit is greater than that required to meet the conductance requirements of the inlet and the outlet.

Reduction of noise produced by hermetic compressors. The acoustic filter includes an inlet duct, an outlet duct and a main chamber. The inlet duct includes a refrigerant fluid inlet and a refrigerant fluid delivery end. The refrigerant fluid delivery end is opposite to the refrigerant fluid inlet and it is capable of guiding the refrigerant fluid to the main chamber. The outlet duct includes a refrigerant fluid outlet and a refrigerant fluid collection end. The refrigerant fluid collection end is opposite to the refrigerant fluid outlet for guiding the refrigerant fluid from the main chamber to the fluid outlet. The filter includes a resonator chamber arranged adjacent to the inlet duct and adjacent to the main chamber. The resonator chamber and the inlet duct are fluidically connected by a resonator tube and the resonator chamber is separated from the main chamber by a sealing wall.

An exhaust coupling for a pump is disclosed. The exhaust coupling for a pump, comprises: an inlet chamber defining a coupling inlet for receiving a fluid from said pump; an outlet chamber defining a coupling outlet for outputting said fluid from said exhaust coupling; and a non-linear inter-chamber conduit fluidly coupling said inlet chamber with said outlet chamber for conveying said fluid from said inlet chamber to said outlet chamber. In this way, noise from the pump is abated since it is initially dampened when received in the inlet chamber, then dampened further by the non-linear inter-chamber conduit, before being dampened yet further within the outlet chamber prior to being emitted through the coupling outlet. The presence of the non-linear inter-chamber conduit ensures that there is no direct, linear path along which the noise can travel from the coupling inlet to the coupling outlet.

Provided is a linear compressor. Provided is a linear compressor. The linear compressor includes a shell defining an internal space, a compressor body disposed in the internal space, and a passage guide disposed between the shell and the compressor body. The passage guide may include a first guide part extending along an inner surface of the shell in an axial direction and a second guide part extending from the first guide part to the compressor body in a radial direction.

A fracturing apparatus may include a first plunger pump including a first power end and a first hydraulic end; a prime mover including a first power output shaft; and a first clutch including a first connection portion and a second connection portion. The first power end of the first plunger pump includes a first power input shaft, the first connection portion is coupled to the first power input shaft, the second connection portion is coupled to the first power output shaft of the prime mover.

A screw compressor having screw rotors for compressing a process gas, a pipe bend conducting compressed process gas towards a silencer. The pipe bend at an inlet-side portion comprises a first connecting piece fastening the pipe bend to a pressure port and on an outlet-side portion a second connecting piece for fastening the pipe bend to the silencer. The pipe bend has a flow channel between the connecting pieces defined by an inner wall and an insert that projects into the inlet-side portion of the pipe bend. An outer wall of the insert projecting into the flow channel of the pipe bend and a portion of the inner wall of the pipe bend enclosing this outer wall on the outside delimit a space acting as resonator, coupled to the flow channel of the pipe bend.