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Pump body of shield pump

A shielded pump and pump body technology, which is applied to pumps, components of pumping devices for elastic fluids, pump components, etc., can solve problems such as short service life, easy cracks, poor ductility, etc., and achieve strengthening Effects of structural stiffness and ductility

Inactive Publication Date: 2016-09-28
HEFEI XINHU CANNED MOTOR PUMP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The pump body materials commonly used in the market are made of ordinary gray cast iron. Although the structure has good rigidity, the ductility is not good. It is prone to cracks when working in cold and cold weather for a long time, and the service life is short.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0013] A pump body of a canned pump, the material of the pump body is gray cast iron as a matrix, and metal wire clusters formed by high-carbon steel wires are distributed in the matrix, and the matrix is ​​composed of the following mass percentage, carbon 2.5% , 1.0% silicon, 0.8% manganese, 0.1% antimony, 0.04% sulfur, and the rest is Fe. The sum of the mass percentages of the above components is 100%; the volume percentage of the high-carbon steel wire used in the material is 18%; the high-carbon steel wire is composed of the following mass percentages, C is 0.5%%, Si is 0.18%, Mn is 0.5%, P is 0.01%, S is 0.01%, and the rest is Fe.

[0014] The pump body of the canned pump made of the above formula has improved structural rigidity and ductility, and its tensile strength can be increased to 285MPa.

Embodiment approach 2

[0016] A pump body of a canned pump, the material of the pump body is gray cast iron as a matrix, and metal wire clusters formed by high-carbon steel wires are distributed in the matrix, and the matrix is ​​composed of the following mass percentage, carbon 3.0% , 1.5% silicon, 1.2% manganese, 0.5% antimony, 0.06% sulfur, and the rest is Fe. The sum of the mass percentages of the above components is 100%; the volume percentage of the high-carbon steel wire used in the material is 18-25%; the high-carbon steel wire is composed of the following mass percentages, C is 0.8%, Si is 0.21%, Mn is 0.7%, P is 0.01%, S is 0.01%, and the rest is Fe.

[0017] In order to further improve the rigidity of the pump body, compounds Mo0.3% and Ti0.08% are also distributed in the matrix. The pump body of the canned pump made of the above formula has improved structural rigidity and ductility, and its tensile strength can be increased to 295~298MPa.

[0018] In order to further improve the ductil...

Embodiment approach 3

[0021] A pump body of a canned pump. The material of the pump body is gray cast iron as a matrix, and metal wire clusters formed by high-carbon steel wires are distributed in the matrix. The matrix is ​​composed of the following mass percentage, carbon 2.8% %, silicon 1.2%, manganese 1.0%, antimony 0.3%, sulfur 0.05%, and the rest is Fe. The total mass percentage of the above components is 100%; the high-carbon steel wire used accounts for the volume percentage of the material is 20%; the high-carbon steel wire is composed of the following mass percentages, C is 0.6%, Si is 0.20%, Mn is 0.6%, P is 0.01%, S is 0.01%, and the rest is Fe.

[0022] In order to further improve the rigidity of the pump body, compounds Mo0.5% and Ti0.12% are also distributed in the matrix. The pump body of the canned pump made of the above formula has improved structural rigidity and ductility, and its tensile strength can be increased to 285~288MPa.

[0023] In order to further improve the ductilit...

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Abstract

The invention discloses a pump body of a shield pump and relates to the technical field of shield pumps. According to the pump body of the shield pump, gray cast iron serves as a base body of the material of the pump body, and metal wire groups formed by high-carbon steel wires are distributed in the base body. The base body is composed of, by mass percentage, 2.5%-3.0% of carbon, 1.0%-1.5% of silicon, 0.8%-1.2% of manganese, 0.1%-0.5% of antimony, 0.04%-0.06% of sulfur and the balance Fe, and the sum of the mass percentages of the above components is 100%. The volume percentage of the high-carbon steel wires in the material ranges from 18% to 25%. The high-carbon steel wires include, by mass percentage, 0.5%-0.8% of C, 0.18%-0.21% of Si, 0.5%-0.7% of Mn, smaller than 0.02% of P, smaller than 0.02% of S and the balance Fe. The pump body of the shield pump is good in ductility.

Description

technical field [0001] The invention relates to the technical field of canned pumps, in particular to a pump body of a canned pump. Background technique [0002] Canned pump is a kind of sealless pump. Both the pump and the drive motor are sealed in a pressure vessel filled with the pumped medium. The pressure vessel is only statically sealed, and a wire set provides a rotating magnetic field and drives the rotor. This structure cancels the rotary shaft sealing device of the traditional centrifugal pump, so it can be completely leak-free. [0003] As the pump body of the canned pump, it not only requires high structural strength, but also requires certain plasticity and ductility. The pump body materials commonly used in the market are made of ordinary gray cast iron. Although the structure has good rigidity, the ductility is not good. It is prone to cracks and has a short service life when working in cold and cold weather for a long time. Contents of the invention [00...

Claims

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Application Information

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IPC IPC(8): F04D29/42C22C49/08C22C49/14
CPCC22C49/08C22C49/14F04D29/42
Inventor 韩元平
Owner HEFEI XINHU CANNED MOTOR PUMP