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Alloy cast iron rotor seat of twin-screw compressor

A technology of alloy cast iron and compressors, which is applied in the field of compressors to achieve the effects of improved service life, good manufacturability and good sealing performance

Inactive Publication Date: 2013-04-24
邢台金后盾精密机械有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The invention provides an alloy cast iron rotor seat of a twin-screw compressor, which has good sealing performance, low noise, no air leakage, no oil leakage, energy saving and environmental protection, stable mechanical performance, wear resistance, corrosion resistance, high temperature resistance, good processing performance, It has the advantages of high processing precision, full use of waste materials, environmental protection, long service life, etc., thus solving the problem that the rotor seat of the twin-screw compressor in the prior art has not been solved for a long time

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Ingredients according to the following weight ratio: 14# gray cast iron: 19%, scrap steel: 39%, returned furnace iron: 38%, 75# ferrosilicon: 1.7%, 58# ferromanganese: 1.4%, high carbon ferrochrome: 0.75%, 65# ferromolybdenum: 0.03%, red copper: 0.09%, 25# ferronickel: 0.02%, smelted in an intermediate frequency electric furnace, quenched and tempered at 1400-1450°C for 20 minutes for casting, and then processed by a Japanese horizontal machining center into The rotor seat of the twin-screw compressor adopts the conventional sand casting method, the main wall thickness of the casting is 10-13mm, and the total weight is 347kg. The processing accuracy reaches 0.038mm, and the performance and quality are stable (details omitted).

Embodiment 2

[0016] Ingredients according to the following weight ratio: 14# gray cast iron: 21%, scrap steel: 38%, returned furnace iron: 37%, 75# ferrosilicon: 1.6%, 58# ferromanganese: 1.5%, high carbon ferrochrome: 0.9%, 65# ferromolybdenum: 0.02%, red copper: 0.11%, 25# ferronickel: 0.03%, smelted in an intermediate frequency electric furnace, tempered at 1400-1450°C for 20 minutes and cast directly, and then processed by a Japanese horizontal machining center into The rotor seat of the twin-screw compressor adopts the conventional sand casting method, the main wall thickness of the casting is 10-13mm, and the total weight is 353kg. The processing accuracy reaches 0.036mm, and the performance and quality are stable.

Embodiment 3

[0018] Ingredients according to the following weight ratio: 14# gray cast iron: 20%, scrap steel: 39%, returned iron: 39%, 75# ferrosilicon: 1.5%, 58# ferromanganese: 1.3%, high carbon ferrochrome: 0.8%, 65# ferromolybdenum: 0.04%, red copper: 0.10%, 25# ferronickel: 0.01%, smelted in an intermediate frequency electric furnace, quenched and tempered at 1400-1450°C for 20 minutes for casting, and then processed by a Japanese horizontal machining center into The rotor seat of the twin-screw compressor adopts the conventional sand casting method, the wall thickness of the casting is 10-13mm, and the total weight is 350kg. The processing accuracy reaches 0.038mm, and the performance and quality are stable.

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Abstract

The invention discloses an alloy cast iron rotor seat of a twin-screw compressor, and relates to the technical field of compressors. The alloy cast iron rotor seat is prepared from the following components according to a weight content: 19-21% of 14# gray cast iron, 37-39% of steel scrap, 37-39% of returning iron, 1.5-1.7% of 75# ferrosilicon, 1.3-1.5% of 58# ferromanganese, 0.75-0.9% of high-carbon ferrochrome, 0.02-0.04% of 65# ferromolybdenum, 0.09-0.11% of copper and 0.01-0.03% of 25# ferronickel by adopting a medium-frequency electric-furnace smelting and sand casting process. The rotor seat prepared from the materials has the advantages of good sealing property, low noise, no gas leakage, no oil leakage, stable mechanical property, wear resistance, corrosion resistance, high temperature resistance, good processability, good processing precision, good manufacturability, long service life and the like.

Description

technical field [0001] The invention relates to the technical field of compressors, in particular to an alloy cast iron rotor seat of a twin-screw compressor. Background technique [0002] Twin-screw compressors are the latest compressors in the world, and can be widely used in refrigeration, heating, gas generation, and booster equipment. It is especially suitable for large-scale central air conditioners, and the current demand is increasing day by day, and the market prospect is very broad. [0003] The rotor seat is the key component of the twin-screw compressor, and its casting material directly affects its service life and mechanical properties. [0004] The existing rotor seat is made of ordinary cast iron with a processing accuracy of 0.1mm. The disadvantages are poor wear resistance, short service life, and unstable mechanical properties; low processing accuracy, poor sealing performance, and high noise affect work efficiency. Therefore, it is necessary to develop ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21C1/08F04C29/00
CPCY02P10/20
Inventor 宋平均王淑英王建民广秀红
Owner 邢台金后盾精密机械有限公司
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