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Screw compressor

A technology of screw compressors and compressors, which is applied to rotary piston machines, mechanical equipment, machines/engines, etc., can solve the problems of complicated processing and assembly, expensive check valves, and lack of advantages in flow loss of check valves. , to achieve the effect of saving assembly costs, avoiding the risk of gas leakage, and low flow loss

Active Publication Date: 2017-08-18
GEA REFRIGERATION GERMANY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Check valves typically used in small compressors and actuated by compression springs are not advantageous due to their large flow losses
Flow-friendly check valves actuated by pressurized gas and commonly found in equipment containing large compressors are expensive
Separate parts require multiple housings connected by connectors, which complicates both machining and assembly

Method used

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  • Screw compressor
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Examples

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Embodiment Construction

[0019] In the first embodiment implemented according to the present invention, as figure 1 As shown, an air suction filter 2 with cylinder-shaped openings on both sides is arranged in the compressor housing 1 of the screw compressor. The compressor housing 1 is closed by a cover 3, so that replacement or cleaning of the suction filter 2 is easily possible. The cover body 3 and the housing body 1 are sealed by a first sealing member 4 (such as an O-ring). Both ends of the suction filter 2 are snapped into the housing 1, so that the gas entering the compressor has to flow through the screen cloth 5 attached to the suction filter 2, and cannot pass through from the outside.

[0020] The valve disk 6 of the non-return valve 7 is arranged coaxially with the suction filter 2 on the valve stem 8 . The valve stem 8 is guided by existing ball bearings 9 such that the valve disc 6 and the valve stem 8 can be displaced coaxially together. A linear ball bearing 9 is arranged in a first...

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PUM

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Abstract

Disclosed is a screw compressor, in particular for refrigeration systems, comprising a compressor housing (1) which at least partly encloses the compressor, an integrated suction gas filter (2) and a non-return valve (7) that is to be actuated by pressurized gas; the compressor housing (1) has grooves, in particular drilled or cast ducts (13, 16, 22, 23, 24) to which pressurized gas can be fed in order to control the non-return valve (7).

Description

technical field [0001] The invention relates to a screw compressor according to the preamble of claim 1 . Background technique [0002] In installations comprising screw compressors, especially refrigeration installations, as shown for example in DE 102005018602 A1. A check valve is usually placed on the suction side of the compressor to prevent the compressor from turning backwards due to the differential pressure across it when the compressor is driven off. Backward rotation of the compressor can endanger said compressor. Likewise, such check valves are also used to ensure that the equipment pressures before and after the compressor are not equal when the compressor is not operating. [0003] Such equipment usually has a filter on the suction side of the compressor to prevent dust from seeping in and damaging the compressor. [0004] In smaller and medium size compressors (up to about 800m 3 / h of suction), the most common is a check valve integrated into the compresso...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04C29/12F04C18/16F04C29/00
CPCF04C18/16F04C29/0092F04C29/126F04C2240/30
Inventor 奥列·弗里德里希奥特玛·纽沃思斯蒂芬·洛施
Owner GEA REFRIGERATION GERMANY