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Screw compressor witrh axially sliding capacity control

A screw compressor, compressor technology, used in refrigerators, machines/engines, liquid fuel engines, etc., can solve problems such as complex equipment and damage to the integrity of the casing

Inactive Publication Date: 2008-11-26
CARRIER CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The sliding valves thus define a portion of each bore, compromising the integrity of the housing and complicating the device

Method used

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  • Screw compressor witrh axially sliding capacity control
  • Screw compressor witrh axially sliding capacity control
  • Screw compressor witrh axially sliding capacity control

Examples

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Embodiment Construction

[0021] exist figure 1 , reference numeral 10 represents a twin-screw screw compressor. Reference numeral 11 denotes a split male rotor, and reference numeral 12 denotes a split female rotor. The axial suction port 14 is located in the end wall 15 of the compressor housing and the axial outflow port 16 is located in the end wall 17 of the compressor housing. The black dotted portion represents the chevron-shaped refrigerant collection volume that begins where the suction port 14 terminates and extends to a point just before communicating with the axial discharge port 16 . As shown, compressor 10 is operating at full load. figure 2 and figure 1 Same, except that the slide valve 20 with its bore 21 and spring 22 is mounted on the male rotor 11 . exist figure 2 neutralize figure 1 As in , the compressor 10 runs at full load.

[0022] image 3 , the slide valve 20 has been moved in its bore 21 by the spring 22 in cooperation with the pressure differential across the slide...

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PUM

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Abstract

An axial slide valve is provided with an axially extending fluid chamber at each end with one chamber receiving a spring and being acted on by suction pressure and the other chamber coacting with a fixed piston and being acted upon by discharge pressure or the like whereby the slide valve is positioned so as to balance the spring and fluid pressures and thereby the compressor capacity.

Description

Background technique [0001] Positive displacement compressors in air conditioning and refrigeration applications generally operate over a range of compression capabilities, so some means is required to alter their operation if efficient operation is to be maintained. It is desirable to be able to unload the compressor to different percentages of compression capacity in fixed increments or continuously throughout the range. At the same time, it is desirable to efficiently maintain the discharge pressure to suction pressure ratio or V i to meet system requirements. To meet these different requirements, a number of independent controls are used. For example in the case of helical screw compressors, slide valves have traditionally been used to achieve compression capacity control. A slide valve is positioned and axially slidable within an apex of a housing formed between intersecting bores of the two rotors. The sliding valves thus define portions of each bore, compromising th...

Claims

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Application Information

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IPC IPC(8): F04C18/16F04C28/06F04C28/12
CPCF04C28/12F04C28/125F04C18/16F25B2600/026Y10T137/2587
Inventor Y·唐B·A·弗拉塞尔
Owner CARRIER CORP
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