In general, a swash plate compressor includes a swash plate which is fitted on a drive shaft, for rotation in unison with the drive shaft, and a plurality of pistons
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What is the purpose of a swash plate?
A swashplate is a device that is used to transmit the pilot's commands from the non-rotating fuselage to the rotating rotor hub and blades. The fact that the rotor blades are rotating at a very high speed makes the swashplate mechanism's task more challenging.
What is swash plate type compressor?
The swash plate is an elliptical disc that is mounted at an angle to the compressor drive shaft. The rotation of the swash plate moves the pistons parallel to the drive shaft. Another component called a slipper disc slides on the swash plate, and a ball rides in a socket in the slipper disc.
Where the swash plate compressor are used?
At the present the swash plate type compressor which is a kind of the reciprocating compressor has been used to the air conditioning system for the vehicle.
What is a hydraulic swash plate?
In a hydraulic motor, a swash plate aids in transforming the axial reciprocating motion of the axial pistons into rotary motion. Basically, the axial pistons move up and down, sliding along the angled surface of the swash plate.
How does a scroll AC compressor work?
A scroll compressor has one fixed scroll which remains stationary and another moving or orbiting scroll that rotates through the use of a swing link. When this happens, the pockets of refrigerant between the two scrolls are slowly pushed to the center of the two scrolls, causing the reduction of the volume of the gas.
What happens when the swash plate angle is increased?
The greater the angle of the swash plate, the greater the piston stroke. The centerline of the pumping piston assembly is offset from the centerline of the swash plate.
What is Swash engineering?
SWASH is a general-purpose numerical tool for simulating unsteady, non-hydrostatic, free-surface, rotational flow and transport phenomena in coastal waters as driven by waves, tides, buoyancy and wind forces.
Which is the function of swash plate in axial-piston pump?
The Swash Plate block models a single, piston-actuated swash plate within an axial-piston pump. It translates linear actuation into rotational motion that, when connected to the Valve Plate Orifice (IL) block, periodically connects the piston with the pump intake and discharge.
How does a wobble pump work?
As the valves are forced to open and close, the wobble plate rotates, creating the suction and discharge pressure. It's a unique and powerful design. Wobble pumps efficiently transfer liquids with thin-to-moderate viscosities, but they can also handle high-solid contents.
What is a plate pump?
A follower plate pump is a device to pump highly viscous material directly from barrels. So it sometimes is called a barrel follower plate pump. It is applied in food manufacturing, resin dispensing, gluing and so on.
Which of the following pneumatic motor types has a swash plate?
Axial piston motor: Axial piston motor has five or more pistons arranged axially and connected to a swash plate.
What is the name of drive pump?
Hydraulic pumps are used in hydraulic drive systems and can be hydrostatic or hydrodynamic. A hydraulic pump is a mechanical source of power that converts mechanical power into hydraulic energy (hydrostatic energy i.e. flow, pressure).
How does a vane compressor work?
Rotary vane compressors consist of a cylindrical casing, two openings - one suction and one discharge - and a rotor positioned eccentrically with respect to the casing. Compression occurs by refrigerant flowing into the chamber where, due to eccentric rotation, there is a reduction in the desired volume.
In which of these pumps swash plate is replaced by flange?
Replacement of swash plate by cylinder block in bent axis piston pump - Hydraulics & Pneumatics.
What is fixed displacement compressor?
Fixed Displacement. Fixed displacement compressors have a swash plate, which is set at a fixed angle. That means, whenever the compressor is turning the pistons are always moving through the same travel, compressing the gas. The only variables, therefore, are compressor speed and quantity of refrigerant in the system.
What controls the angle of the swash plate in a variable swash plate compressor?
The swashplate angle is controlled with linkage and springs, which are adjusted by changing the refrigerant pressure in the compressor housing. A control valve with ports and passages that connect to the suction (low-side) and discharge (high-side) chambers of the compressor head is utilized.
What is a swashplate engine?
The swashplate engine uses a swashplate in place of a crankshaft to translate the motion of a piston into rotary motion. Internal combustion engines and Stirling engines have been built using this mechanism. Duke Engines has been working on such a platform since 1993.
What is a swashplate?
It is a mechanical engineering device used to translate the motion of a rotating shaft into reciprocating motion, or vice versa. The working principles is similar to crankshaft, Scotch yoke, or wobble/nutator/Z-crank drives, in engine designs.
How does a swashplate work?
If the disk were aligned perpendicular to the shaft, then rotating the shaft would merely turn the disk with no reciprocating (or swashplate) effect. But instead the disk is mounted at an oblique angle , which causes its edge to appear to describe a path that oscillates along the shaft's length as observed from a non-rotating point of view away from the shaft. The greater the disk's angle to the shaft, the more pronounced is this apparent linear motion. The apparent linear motion can be turned into an actual linear motion by means of a follower that does not turn with the swashplate but presses against one of the disk's two surfaces near its circumference. The device has many similarities to the cam .
How many shafts are on a swashplate?
Swashplate animation. The rotating shaft and plate are shown in silver. The fixed plate is shown in gold and six shafts each take a reciprocating motion from points on the gold plate. The shafts might be connected to pistons in cylinders. Note the power may be coming from the shaft to drive the pistons as in a pump, or from the pistons to drive the shaft rotation as in an engine.
What is a helicopter swashplate?
A helicopter swashplate is a pair of plates, one rotating and one fixed, that are centered on the main rotor shaft. The rotating plate is linked to the rotor head, and the fixed plate is linked to the operator controls.
What is an axial piston pump?
The axial piston pump drives a series of pistons aligned parallel with a shaft through a swashplate to pump a fluid. A common example of a swashplate application in a fluid pump is the compressor of a present-day automobile air conditioning system. By varying the angle of the swashplate, the pistons' stroke (and, therefore, the compressor's cooling capacity) can be dynamically adjusted.
What is a swash plate compressor?
At the present the swash plate type compressor which is a kind of the reciprocating compressor has been used to the air conditioning system for the vehicle. This compressor consists of cylinder, piston, swash plate, shoe and valve assembly, and is operated by the rotation of swash plate which is connected to the vehicle engine drive at the high speed this compressor operates from 800rpm to 4000rpm. Also the displacement range of vehicle compressor is about from 90cc to 180cc. Therefore in the reciprocating compressor, the valve assembly is the main design parameter in order to improve the compressor performance. This paper presents the optimal design method of suction valve and discharge valve of swash plate compressor. It also shows the compressor performance analysis on the suction valve shape and the two suction port shape with the large valve flow area and the low valve lift height. Also the discharge port flow analysis for reducing the pressure drop was carried out by CFD and the two stage discharge port was designed with low over pressure and small dead volume. Finally the improved valve assembly was manufactured and the compressor performance test was carried out. As the test results, we could get the about 12.7% increase of compressor performance under general operating conditions like as suction pressure 2.8 bar,abs, discharge pressure 16 bar,abs and super heated temperature 10K.
What causes a swashplate to be off center?
Off-centeredness of a swashplate can occur from an assembly error or component wear. When the pump is working, the piston will produce force to the swashplate through the chuck. If the swashplate clearance increases, then the swashplate will move to that side. After a certain offset, the ability of automatic centering of piston components will make the swashplate return to the center. These two effects will eventually lead to back and forth oscillatory movement of the swashplate, and the vibration in radial direction can become abnormal. This type of fault is typical of gradual failure of a pump.
How does a piston pump work?
A ball-and-socket joint connects the end of each piston to a slipper pad, which is kept always in contact with the swash plate. During cylinder block rotation, each piston periodically passes over the discharge and intake ports on the valve plate. Since the slipper pads are held against the inclined plane of the swash plate, each piston undergoes an oscillatory motion in and out of the cylinder block. As any piston passes over the intake port, it withdraws from the cylinder block and fluid is drawn into the piston chamber. As the piston passes over the dis charge port, it advances into the cylinder block and pushes the fluid out of the piston chamber. The pivoting point, around which the swash plate swings, is the center of the pitch circle of the pistons spherical heads when the swash plate angle of inclination is zero.
How are flywheel discs assembled?
The three discs in the foreground are those which are assembled immediately adjacent to a disc carrying straingauges. The assembly is arranged so that the straingauges and the associated wiring are within the radial channels left between the wedges of laminated plastic. The small segments at the hub are of course thinner than those on the main conical section as it is necessary for them to present the same axial thickness irrespective of the cone angle. The discs themselves are flow formed with the same requirement in mind. Note how the inner and outer surfaces ‘stack’ in the group on the righthand side of the picture.
What are the components of an axial piston pump?
An axial piston pump is shown in Fig. 2.25. The major components are the swashplate, the axial pistons with shoes, the cylinder barrel , the shoeplate, the shoeplate bias spring, and the port plate . The shoeplate and the shoeplate bias spring hold the pistons against the swashplate, which is held stationary while the cylinder barrel is rotated by the prime mover. The cylinder, the shoeplate , and the bias spring rotate with the input shaft, thus forcing the pistons to move back and forth in their respective cylinders in the cylinder barrel. The input and output flows are separated by the stationary port plate with its kidney-shaped ports. Output volume may be controlled by changing the angle of the swashplate . As angle a between the normal to the swashplate and the axis of the drive shaft in Fig. 2.26b goes to zero, the flow volume decreases. If angle a increases ( Fig. 2.26a ), the volume also increases. Axial piston pumps with this feature are known as overcenter axial piston pumps.
Who is the MACS member for the photo of the swash plate compressor in figure 1?
Thank you to MACS member Sanden International for the photo of the swash plate compressor in figure 1.
How many pistons are in a single row compressor?
The single row axial compressor has five, six or seven pistons connected to a wobble plate. The piston’s connecting rods have a ball mounted on each end, and these balls fit into sockets on each piston and the wobble plate.
How does a wobble plate work?
The wobble plate is held in place by anti-rotation gears, and a cam rotates behind the wobble plate. The combination of the rotating cam and the stationary wobble plate causes the pistons to move in a plane parallel to the compressor drive shaft.
