Study and Application of the Designing Theory of the Vane Profile for any Rotary Vane Compressor

2011 ◽  
Vol 47 (15) ◽  
pp. 143 ◽  
Author(s):  
Liquan SONG
Keyword(s):  
Rotary Vane Compressor

Measurement of the Air Pressure for a Rotary Vane Compressor

2003 ◽  
Author(s):  
Yuan Mao Huang ◽  
Sheng An Yang
Keyword(s):  
Frequency Converter ◽  
Air Pressure ◽  
Cover Plate ◽  
Rotary Compressor ◽  
Compression Phase ◽  
Pressure Transducers ◽  
Compressor Rotor ◽  
Two Phases ◽  
Rotary Vane Compressor ◽  
Type Pressure

This study introduces an experimental method that can measure air pressures in the vane segments when a sliding-vane rotary compressor performs suction and compression phases in stable or unstable rotational speeds. When the air pressures of these two phases can be measured, the intake effect of the compressor’s inlet and the seal effect of the vane segments can be evaluated, respectively. Because a frequency converter provides unstable rotational speeds when it controls rotational speeds of a motor with a compressor, an encoder mounted on the output shaft of the motor was applied to record the angular location of the compressor rotor. Two strain gauge type pressure transducers were inserted into the cover plate of the compressor to measure air pressures in the vane segments. Comparing the signals of the encoder with pressure transducers, the air pressures in completions of suction and compression phases could be determined in stable or unstable rotational speeds. The air pressures when the compressor performed suction and compression phases were 99.5 kPa and 153 kPa, respectively, in 1400 rpm. The air pressure when the compressor performed suction phase decreased with the rotational speed faster than 800 rpm. The size or shape of the inlet port of the compressor should be enlarged or modified to provide the suction air pressure without dropping too much. The designed air pressure when the compressor performed compression phase was 244 kPa in 140 rpm, the manufacture precision of the compressor should be increased to decrease leakage.

Profile design for the cylinder of a double-acting rotary vane compressor

2015 ◽  
Vol 230 (13) ◽  
pp. 2300-2313 ◽  
Author(s):  
Liquan Song ◽  
Liping Zeng ◽  
Jiandong Zhou ◽  
Xiao Luo
Keyword(s):  
Cell Volume ◽  
Cooling Capacity ◽  
Friction Characteristic ◽  
Motion Equations ◽  
Working Volume ◽  
Profile Design ◽  
Motion Characteristics ◽  
Wall Profile ◽  
Rotary Vane Compressor ◽  
Isentropic Efficiency

Inner wall profile of the cylinder in a rotary vane compressor (RVC), which influences the motion characteristics of vanes, suction volume, friction characteristic, etc., plays an important role in the performance of the compressor. This work mainly aims at the profile design of a new cylinder for a double-acting RVC with harmonic profile cylinder on the basis of not changing integrate size. According to the relation between cylinder profile and vane motion characteristics, a method for the cylinder profile design is proposed in this paper. With an assumed vane motion, equations of the cylinder profile, cell volume of the compressor as well as pressure angles between vanes and cylinder inner wall are constructed preliminarily. And then through adjusting parameters and optimization with an independently developed procedure, a new cylinder with the so-called combined profile is obtained. Theoretical analysis of the cell volume variations and the pressure angles between vanes and cylinder are conducted. The results show that there is neither rigid impulse nor soft impulse between vanes and cylinder due to the vane continuous motion including displacement, velocity and acceleration. And the pressure angles between vane and cylinder and working volume of the compressor with the new profile cylinder are superior to harmonic profile cylinder, which is useful for the reduction of friction power in the operation of compressor. Experiments show that the cooling capacity and COP of the test refrigeration cycle with the proposed combined profile cylinder is higher than the compressor with harmonic profile cylinder. And the volumetric efficiency and isentropic efficiency of the compressor with combined profile cylinder have better performance. This method can be applied to the design of the cylinder for multiple-acting rotary vane compressors, rotary vane expanders and vane pumps.

scholarly journals A preliminary evaluation of the Groll rotary vane compressor

1992 ◽  
Vol 15 (2) ◽  
pp. 69-73 ◽  
Author(s):  
I.K. Smith ◽  
H.R. Harrison ◽  
M. Cox
Keyword(s):  
Preliminary Evaluation ◽  
Rotary Vane Compressor

Design Control of Overcompression in Rotary-Vane Compressors

1960 ◽  
Vol 82 (3) ◽  
pp. 221-226 ◽  
Author(s):  
E. O. Bransford ◽  
R. A. Stein
Keyword(s):  
Energy Loss ◽  
Discharge Process ◽  
Cylinder Radius ◽  
Cylinder Length ◽  
Rotary Vane Compressor ◽  
Refrigeration Compressor

In its simplest terms, the design of a rotary-vane compressor of a given displacement consists of selecting a particular combination of rotor and cylinder radius, cylinder length, and number of vanes. A study of the rotary-vane compressor has shown that the choice is not entirely arbitrary since thermodynamic and mechanical losses occurring in the compressor are intimately associated with these basic dimensions. One of the more important of these geometrically dependent losses was found to be potentially severe overcompression during the discharge process. In this paper, an equation is developed that describes in generalized form the relation of overcompression to the dimensions of the compressor. This equation is used to evolve an energy-loss criterion for design control of this loss. An example of the application of the criterion to a refrigeration compressor is included.

scholarly journals Analysis of a gap flow on the side plate for rotary vane compressor.

1990 ◽  
Vol 56 (526) ◽  
pp. 1607-1610
Author(s):  
Itsuro HONDA ◽  
Hideki OHBA ◽  
Masakazu SOEJIMA ◽  
Yukitoshi NAKASHIMA
Keyword(s):  
Side Plate ◽  
Gap Flow ◽  
Rotary Vane Compressor

Nonaxisymmetric Flow in the Narrow Gap Between a Rotating and a Stationary Disk

1976 ◽  
Vol 98 (2) ◽  
pp. 217-223 ◽  
Author(s):  
M. Bein ◽  
A. Shavit ◽  
A. Solan
Keyword(s):  
Flow Field ◽  
Perturbation Technique ◽  
Fluid Pressure ◽  
Rotating Disk ◽  
Operating Conditions ◽  
Narrow Gap ◽  
Stationary Disk ◽  
Flow Maps ◽  
Pass Through ◽  
Rotary Vane Compressor

The flow between a rotating disk and a stationary disk, with nonaxisymmetric boundary conditions is studied. A flow field of this type exists in the narrow gap between the rotor and side plates of a rotary vane compressor. Fluid is admitted into the gap in the center of the disk for the purpose of sealing against leakage due to the nonaxisymmetric pressure distribution externally imposed on the disk circumference. The flow is solved analytically by a perturbation technique. Flow maps and pressure maps are obtained for various operating conditions. The effectiveness of the fluid seal is evaluated for these conditions by calculating the flow rates that pass through the gap. The flow field is simulated on a test apparatus and experimental verification is given to the analytical results. The results obtained indicate the possibility of appreciably reducing the leakage through the gap by a proper selection of the fluid pressure and the disk geometry.

A Latching Mechanism for Unloading a Rotary Compressor

1999 ◽  
Author(s):  
Joseph L. Smith ◽  
Michael D. Webb ◽  
Stephen D. Umans
Keyword(s):  
Air Conditioning ◽  
Rotary Compressor ◽  
Electronic Control ◽  
Motor Speed ◽  
Air Conditioning System ◽  
Mechanical Unloading ◽  
Potential Alternative ◽  
Residential Air Conditioning ◽  
Rotary Vane Compressor ◽  
Capacity Performance

Abstract A vane latching mechanism for unloading a rotary vane compressor is described. Mechanical unloading is proposed as a potential alternative to electronic control of motor speed for variable compressor capacity. Performance of a demonstration compressor operating at part capacity in a residential air conditioning system is described.

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