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A method for starting a large-scale screw compressor and a large-scale screw compressor based on the method

A screw compressor and compressor technology, which is applied to compressors, refrigerators, refrigeration components, etc., can solve the problems of difficulty in starting large screw compressors and reducing the shaft power of screw compressors.

Active Publication Date: 2016-07-13
SIFANG TECH GRP CO LTD
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  • Claims
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Problems solved by technology

[0005] Aiming at the deficiencies in the prior art, the present invention provides a method for starting a large-scale screw compressor, which realizes the purpose of reducing the shaft power of the screw compressor by reducing the pressure in the oil separator, and solves the problem that the large-scale screw compressor is difficult to start The problem

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  • A method for starting a large-scale screw compressor and a large-scale screw compressor based on the method
  • A method for starting a large-scale screw compressor and a large-scale screw compressor based on the method
  • A method for starting a large-scale screw compressor and a large-scale screw compressor based on the method

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Embodiment Construction

[0017] The accompanying drawings disclose, without limitation, the structural schematic diagrams of the preferred embodiments involved in the present invention; the technical solution of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0018] Such as figure 2 As shown, the large-scale screw compressor equipped with an auxiliary start-up device according to the present invention includes a screw compressor, and the outlet of the screw compressor is connected to the air return port of the compressor after passing through the oil separator, condenser and evaporator in sequence A check valve a and a shut-off valve a are sequentially connected between the outlet of the oil separator and the inlet of the condenser, and an auxiliary starting device is installed between the inlet end and the outlet end of the check valve a. The starting device includes a cut-off valve e, an auxiliary start-up compressor and a check valve b conne...

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Abstract

The invention discloses a starting method of a large screw compressor and a large screw compressor based on the starting method; the starting method realizes the purpose of reducing the shaft power of the screw compressor starting by reducing the pressure in the oil separator; The reduction of the starting shaft power of the large screw compressor is realized by installing an auxiliary starting device between the inlet and outlet ends of the check valve a installed at the outlet of the oil separator, and the auxiliary starting device includes sequentially connected Shut-off valve e, auxiliary starter compressor and check valve b. It can be seen that the present invention solves the problem that the large-scale screw compressor is difficult to start.

Description

technical field [0001] The invention relates to a method for starting a large screw compressor, which belongs to the field of refrigeration systems. [0002] The present invention also relates to a large screw compressor based on the above startup method, which is realized by configuring an auxiliary startup device. Background technique [0003] The installed power of large screw compressors is mostly above 100KW, and usually operates at a high speed above 2950r / miny. When the energy of the compressor is unloaded to zero, there will still be more than 10% of the load, so the compressor needs a large power consumption when starting. , which will not only cause large voltage fluctuations in the entire power grid, but also cause difficulty in starting due to excessive voltage drop. Some solve this problem by increasing the capacity of the transformer, using a high-voltage motor, soft start or variable frequency start, etc., but all of them require a large investment, or the ab...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F25B31/00
Inventor 楼晓华张建华曹德云周淋会
Owner SIFANG TECH GRP CO LTD
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