Pump body assembly, fluid machinery, and a heat exchange device. The pump body assembly includes: an upper flange; a lower flange; a cylinder arranged between the upper flange and the lower flange; a sliding block structure, rotatably arranged inside the cylinder, where the sliding block structure includes a connecting portion and two sliding sub-blocks arranged on the connecting portion, and the two sliding sub-blocks and an inner wall surface of the cylinder form a first sliding hole; a piston, slidably arranged inside the first sliding hole, where a variable volume cavity is formed between the piston and an inner wall of the cylinder, and the piston has a second sliding hole; and a rotation shaft, where at least a portion of the rotation shaft is slidably arranged inside the second sliding hole.

The present disclosure describes a rotary pulsation generator having a simple structure capable of transferring fluid while implementing low noise and low vibration and having high flow of fluid and high pressure suction and discharge functions. According to the present disclosure, fluid is transferred by adjusting a width and interval of pulsation while reducing vibration caused by eccentric rotation of a rotor.

A scroll compressor including a first bearing rotatably supporting a rotary shaft relative to a casing at one side of the rotary shaft with respect to a motor, a second bearing rotatably supporting the rotary shaft relative to the casing at the other side of the rotary shaft with respect to the motor, and a third bearing rotatably supporting the rotary shaft relative to an orbiting scroll at the opposite side of the first bearing with respect to the second bearing. The distance between a first bearing center and a third bearing center is a predetermined distance, the distance between a motor center and the third bearing center is longer than the distance between the motor center and the first bearing center, and the distance between a second bearing center and the motor center is longer than the distance between the second bearing center and the third bearing center.

Described herein is a mechanism including: a driving shaft comprising an eccentric crank and an arm part extending radially from the driving shaft, the arm part of the driving shaft comprising a piston housing; a piston in the piston housing; an eccentric lever bushing comprising an arm part extending radially therefrom, a cylindrical outer surface and a cylindrical hole, wherein the cylindrical hole is rotatably attached to the eccentric crank, wherein an axis of the cylindrical hole and an axis of the cylindrical outer surface are parallel and offset; wherein the piston is configured to apply a torque on the eccentric lever bushing by pushing the arm part of the eccentric lever bushing. The driving shaft may further comprise a channel configured to apply fluid pressure on the piston. This mechanism may be used in a device such as a star scroll compressor.

A compressor includes a shell, a first compression member, a bearing housing and a second compression member. The first compression member is rotatable relative to the shell about a first axis. The bearing housing is coupled to the first compression member and rotatable relative to the shell about the first axis. The bearing housing includes a first pin that extends therefrom. The second compression member is rotatable relative to the shell about a second axis. The second compression member includes a base plate and an arcuate-shaped first pin pocket. The first pin pocket is formed in the base plate and receives the first pin. The first compression member is moveable between a first position in which the first pin is engaged with a surface of the first pin pocket and a second position in which the first pin is disengaged from the surface of the first pin pocket.

In order to improve a compressor comprising a compressor housing, a scroll compressor unit which is arranged in the compressor housing and comprises a first stationary compressor body and a second compressor body that can be moved relative to the stationary compressor body, an eccentric drive for the scroll compressor unit, said drive having a drive member which is driven by a drive motor and which revolves about the central axis of a driveshaft on an orbital path, and an orbital path balancing mass which counteracts an unbalance due to the compressor body moving on the orbital path, so that even at high rotational speeds the long-term stability of the drive member guidance in the drive member receptacle can be ensured, it is proposed that the orbital path balancing mass is coupled to the eccentric drive such that the mass moves on the orbital path in a manner corresponding to the movement of the drive member but is uncoupled with respect to the transmission of tilting moments to the drive member.

A sliding component has an annular shape with a fluid facing inside and outside of the sliding component and has a sliding surface relatively sliding with eccentric rotation, in which the sliding surface includes a land and a plurality of dynamic pressure generation mechanisms arranged in a circumferential direction, the dynamic pressure generation mechanism includes a shallow groove portion and a deep groove portion, the shallow groove portion communicates with the deep groove portion, and a communication passage providing a communication between the deep groove portion and either an inside space or an outside space of the sliding component is formed in the sliding component.

A pump and method for pumping a gas are disclosed. The pump comprises a rotor and a stator. At least one of the rotor or stator comprises at least one liquid opening configured for fluid communication with a liquid source. The liquid opening is configured such that in response to a driving force exerted on liquid from the liquid source a stream of liquid is output from the opening, the stream of liquid forming a liquid blade between the rotor and the stator, gas confined by said stator, said rotor and said liquid blade being driven through said pump from a gas inlet towards a gas outlet.

A safety device for an orbital pump has first and second interleaved parts which are operable to follow an orbital path with respect to each other, the safety device comprising: a first member fixable with respect to the first interleaved part; and a second member fixable with respect to the second interleaved part, the second member defining an aperture into which the first member is receivable, the aperture being dimensioned to prevent movement of the first interleaved part with respect to the second interleaved part beyond the orbital path. In this way, the members of the safety device help to prevent the moving components of the pump contacting, thereby preventing damage.

A co-rotating scroll machine operable as compressor or expander, comprises a transmission and guidance mechanism for first and second scroll plates, having three transmission and guidance units uniformly distributed around the scroll plates towards the periphery thereof. Each transmission and guidance unit comprises a male element mounted on one of the scroll plates and a facing female element mounted on the facing scroll plate. Each transmission and guidance unit comprises an internal ring mounted for angular displacement in the opening of the female element, the internal ring having therein a slot wherein the male element of the transmission and guidance unit slides. The male of the three transmission and guidance units are supported and guided by respective support elements on a common external guide ring. A liquid injection system comprises a liquid channel which is connected with bleed holes.