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Full-metal high-temperature-resistant screw pump

A high temperature resistant, screw pump technology, used in pumps, pump components, rotary piston pumps, etc., can solve the problems of short working life, leakage, and the inability to produce all-metal screw pumps, and achieve low operating noise and floor space. Less, solve the effect of short working life

Inactive Publication Date: 2013-03-20
宁波正鼎石油机械设备制造有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, although the existing all-metal screw pump has the effect of corrosion resistance and high temperature resistance in theory, it is found in the actual use process that the working life of the all-metal screw pump with this structure is very short, only 90 days at most. Leakage will occur, resulting in the all-metal screw pump can not really be used in the actual production process

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Embodiment 1: As shown in the figure, an all-metal high-temperature-resistant screw pump includes a metal stator 1 and a metal rotor 2. The inner surface of the metal stator 1 and the outer surface of the metal rotor 2 are in clearance fit, and the inner surface of the metal stator 1 is in contact with the metal rotor 2. The gap distance on the outer surface of the rotor 2 is 0.01 mm. The metal stator 1 includes a stator metal base 11 and a hard material permeation layer 12 arranged on the inner surface of the stator metal base 11. The metal rotor 2 includes a rotor metal base 21 and a metal base 21 arranged on the rotor metal base. The chromium-coated layer 22 on the outer surface of 21, the hard material infiltrated layer 12 is a tungsten carbide layer with a Hastelloy hardness of HV1100, the thickness of the hard material infiltrated layer 12 is 4 microns, and the Hastelloy hardness of the chromium-coated layer 22 is HV900 , the thickness of the chrome-coated layer 22...

Embodiment 2

[0014] Embodiment 2: As shown in the figure, an all-metal high-temperature-resistant screw pump includes a metal stator 1 and a metal rotor 2. The inner surface of the metal stator 1 and the outer surface of the metal rotor 2 are in clearance fit, and the inner surface of the metal stator 1 is in contact with the metal rotor 2. The gap distance on the outer surface of the rotor 2 is 0.4 mm. The metal stator 1 includes a stator metal base 11 and a hard material permeation layer 12 arranged on the inner surface of the stator metal base 11. The metal rotor 2 includes a rotor metal base 21 and a metal base 21 arranged on the rotor metal base. The chrome-coated layer 22 on the outer surface of 21, the hard material infiltrated layer 12 is a tungsten carbide layer with a Hastelloy hardness of HV1200, the thickness of the hard material infiltrated layer 12 is 10 microns, and the Hastelloy hardness of the chromium-coated layer 22 is HV900 , the thickness of the chrome-coated layer 22 i...

Embodiment 3

[0015] Embodiment 3: As shown in the figure, an all-metal high-temperature-resistant screw pump includes a metal stator 1 and a metal rotor 2, the inner surface of the metal stator 1 and the outer surface of the metal rotor 2 are in clearance fit, and the inner surface of the metal stator 1 is in contact with the metal rotor 2. The gap distance on the outer surface of the rotor 2 is 0.2 mm. The metal stator 1 includes a stator metal base 11 and a hard material permeation layer 12 arranged on the inner surface of the stator metal base 11. The metal rotor 2 includes a rotor metal base 21 and a metal base 21 arranged on the rotor metal base. The chrome-coated layer 22 on the outer surface of 21, the hard material infiltrated layer 12 is a tungsten carbide layer with a Hastelloy hardness of HV1150, the thickness of the hard material infiltrated layer 12 is 15 microns, and the Hastelloy hardness of the chromium-coated layer 22 is HV900 , the thickness of the chrome-coated layer 22 i...

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Abstract

The invention discloses a full-metal high-temperature-resistant screw pump, which comprises a metal stator and a metal rotor, wherein the inner surface of the metal stator is in clearance fit with the outer surface of the metal rotor. The full-metal high-temperature-resistant screw pump is characterized in that the metal stator comprises a stator metal matrix and a hard material seepage layer arranged on the inner surface of the stator metal matrix; the metal rotor comprises a rotor metal matrix and a chromium coating layer arranged on the outer surface of the rotor metal matrix; and a Hartz hardness difference between the hard material seepage layer and the chromium coating layer is HV-200 to HV300. The full-metal high-temperature-resistant screw pump has the advantages that the hard material seepage layer and the chromium coating layer are respectively arranged on the inner surface of the stator and the outer surface of the rotor; effects of corrosion resistance and high tempeture resistance during actual use of the full-metal screw pump are enhanced; and the shortcoming of short service life of the full-metal high-temperature-resistant screw pump is effectively solved.

Description

technical field [0001] The invention relates to a screw pump, in particular to an all-metal high temperature resistant screw pump. Background technique [0002] As a new technology with great potential and advantages in downhole mining technology, screw pump has been more and more widely used in various oil fields in the world in recent years. It has the characteristics of small initial investment, simple structure of ground driving device, convenient installation, small footprint and high pump efficiency. At present, the application of screw pumps is mainly concentrated in several major fields such as heavy oil cooling pumps, sand production reservoirs, offshore platforms, energy conservation and environmental protection. The traditional screw pump stator is made of nitrile rubber lining in the steel sleeve. But this kind of rubber stator screw pump usually can only cope with the normal work of low speed, low viscosity and low temperature. As the speed increases, the fri...

Claims

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Application Information

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IPC IPC(8): F04C2/107F04C15/00
Inventor 郑奋勇郑锦旗
Owner 宁波正鼎石油机械设备制造有限公司
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