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Manufacturing technology for natural aerodynamic cylinder

A manufacturing process and power cylinder technology, which is applied in the field of natural gas power cylinder manufacturing process, can solve the problems of unreasonable ratio of resin sand, low surface finish, sand inclusion, sand expansion, etc., to achieve high quality, reduce sand inclusion, The effect of improving quality

Active Publication Date: 2015-07-01
BC P INC CHINA NAT PETROLEUM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] 2. The disadvantages caused by the process are that because the outer mold is made of clay sand, the dimensional accuracy is poor, the surface finish is low, and casting defects such as sand inclusion and sand expansion are easy to occur
[0014] 1. The proportion of resin sand is unreasonable, resulting in casting defects such as sand inclusion and swelling in the casting process
[0015] 2. There are defects such as pores and pinholes in the baking process after the resin sand molding is completed

Method used

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  • Manufacturing technology for natural aerodynamic cylinder
  • Manufacturing technology for natural aerodynamic cylinder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0113] The manufacturing process of the natural gas power cylinder block of the present embodiment comprises the following steps;

[0114] (1) Use raw sand with a particle size of 40 mesh, furan resin accounting for 1.2% of the original sand weight, and 0.36% p-toluenesulfonic acid mixed resin sand to make the shape and sand core; after making the shape, take it out Molding, shaping and brushing zircon powder paint twice; after making sand cores, carry out mold taking, shaping and brushing zircon powder first and tellurium powder paint again.

[0115] (2) Put the finished shape and sand core into the drying furnace, heat the temperature to 210°C, keep it warm for 4.5 hours, and then adjust the temperature to 95°C for heat preservation treatment until the box is closed.

[0116] (3) Smelting molten iron:

[0117] The weight percentage composition of molten iron is: carbon 3.55-3.65%, silicon 1.6-1.8%, manganese 0.5-0.6%, phosphorus 0-0.06%, sulfur 0-0.02%, chromium 0.15-0.25%,...

Embodiment 2

[0130] The manufacturing process of the natural gas power cylinder block of the present embodiment comprises the following steps;

[0131] (1) Use raw sand with a particle size of 70 mesh, furan resin accounting for 1.5% of the weight of the original sand, and resin sand accounting for 1.05% of the weight of the original sand to be mixed with p-toluenesulfonic acid to make the shape and sand core; after making the shape, take it out Molding, shaping and brushing zircon powder paint twice; after making sand cores, carry out mold taking, shaping and brushing zircon powder first and tellurium powder paint again.

[0132] (2) Put the finished shape and sand core into the drying furnace, heat the temperature to 230°C, keep it warm for 3.5 hours, and then adjust the temperature to 105°C for heat preservation treatment until the box is closed.

[0133] (3) Smelting molten iron:

[0134] The weight percentage composition of molten iron is: carbon 3.55-3.65%, silicon 1.6-1.8%, mangane...

Embodiment 3

[0147] The manufacturing process of the natural gas power cylinder block of the present embodiment comprises the following steps;

[0148] (1) Use raw sand with a particle size of 50 mesh, furan resin accounting for 1.4% of the weight of the original sand, and resin sand accounting for 0.5% of the weight of the original sand to be mixed with p-toluenesulfonic acid to make the shape and sand core; after making the shape, take it out Molding, shaping and brushing zircon powder paint twice; after making sand cores, carry out mold taking, shaping and brushing zircon powder first and tellurium powder paint again.

[0149] (2) Put the finished shape and sand core into the drying furnace, heat the temperature to 220°C, keep it warm for 4 hours, then adjust the temperature to 100°C for heat preservation treatment, until the box is closed.

[0150] (3) Smelting molten iron:

[0151] The weight percentage composition of molten iron is: carbon 3.55-3.65%, silicon 1.6-1.8%, manganese 0.5...

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Abstract

The invention discloses a manufacturing technology for a natural aerodynamic cylinder and aims to solve the problems that a conventional cast natural aerodynamic cylinder is low in precision and intensity and has multiple casting defects. The manufacturing technology disclosed by the invention mainly comprises the working procedures of contour and sand core manufacturing, baking, molten iron smelting, vermicularizing treatment and pouring. The natural aerodynamic cylinder manufactured by the manufacturing technology has the characteristics of high contour size precision, high surface smoothness, high intensity and high mechanical property, and the manufacturing technology is particularly suitable for manufacturing of the natural aerodynamic cylinder.

Description

technical field [0001] The invention belongs to the technical field of natural gas power cylinders, and in particular relates to a manufacturing process of natural gas power cylinders. Background technique [0002] In the prior art, natural gas is mainly compressed by a pipeline release steam turbine and a centrifugal natural gas compressor. [0003] At present, domestic and foreign natural gas compressors are mainly divided into high-speed and high-power reciprocating piston compressors and low-speed reciprocating compressors. Among them, the high-speed and high-power reciprocating piston compressor, with a speed n of 1000r / min and a power P of 6000kW, is mainly used for natural gas gathering and transportation pressurization and gas injection in gas storage. It is an indispensable equipment for natural gas exploration, development and storage . The power cylinder is the main part of the natural gas compressor to provide power during the process of compressing natural gas...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22C1/22B22C1/10B22C9/12B22C9/24
Inventor 李振波刘锐张前李荣飞张钰廖渝隆朱文武吴中麒谭昭金杨鹏刘明星姜超谭学木段悦洪李胜钟明春李健凌波
Owner BC P INC CHINA NAT PETROLEUM CORP
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