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Three-screw pump machine barrel and ceramic treatment method of inner surface of three-screw pump machine barrel

A three-screw pump and inner surface technology, applied in the direction of machines/engines, surface reaction electrolytic coating, pump components, etc., can solve the problems of easy aging anisotropy, high temperature sensitivity, etc., achieve good adhesion performance and prolong service time , high processing efficiency

Active Publication Date: 2014-05-07
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention aims to solve the problems that the rubber bushing of the existing three-screw pump has high temperature sensitivity, is easy to age and has anisotropy, and now provides a three-screw pump barrel and a method for ceramic treatment of the inner surface of the three-screw pump barrel

Method used

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  • Three-screw pump machine barrel and ceramic treatment method of inner surface of three-screw pump machine barrel
  • Three-screw pump machine barrel and ceramic treatment method of inner surface of three-screw pump machine barrel
  • Three-screw pump machine barrel and ceramic treatment method of inner surface of three-screw pump machine barrel

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specific Embodiment approach 1

[0038] Specific embodiment one: a kind of three-screw pump barrel described in this embodiment, the inner wall of this pump barrel is coated with a layer of ceramic film, and this layer of ceramic film includes 90% to 95% Al 2 o 3 , the thickness is between 50μm and 70μm, and the hardness is 800HV.

[0039] Specific implementation mode two: refer to figure 1 , figure 2 , image 3 and Figure 4 Specifically explain this embodiment, a method for ceramicizing the inner surface of a three-screw pump barrel described in this embodiment, the method includes the following steps:

[0040] Step 1: Prepare a ceramic film layer on the inner surface of the pump barrel 1, the specific process is:

[0041] Use the end cover 7 to seal one end of the pump barrel 1 to be treated, and fill the cavity of the pump barrel 1 with alkaline working fluid;

[0042] Dip three carbon rods 2 with different volumes into the alkaline working fluid in the chamber of the pump barrel 1, and keep the th...

specific Embodiment approach 3

[0054] Specific Embodiment 3: This embodiment is a further description of the method for ceramicizing the inner surface of a three-screw pump barrel described in Specific Embodiment 2. In this embodiment, before step 1, the pump barrel is first 1 to clean, the specific method includes the following steps:

[0055] Step 11: Immerse the pump barrel 1 in clean water, clean the inner wall of the pump barrel 1 with clean water for 1 to 3 minutes, and then dry the pump barrel 1;

[0056] Step 1 and 2: Immerse the pump barrel 1 cleaned in step 1 in acetone or absolute ethanol, let it stand for 3 minutes to 5 minutes, and then dry the pump barrel 1 to obtain the cleaned pump barrel 1 .

specific Embodiment approach 4

[0057] Embodiment 4: This embodiment is a further description of the method for the ceramic treatment of the inner surface of a three-screw pump barrel described in Embodiment 2. In this embodiment, the solute of the alkaline working fluid described in Step 1 Includes: KOH and NaSiO 3 , where the concentration of KOH is 2g / L to 4g / L, NaSiO 3 The concentration is 10g / L to 15g / L.

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Abstract

The invention relates to a three-screw pump machine barrel and a ceramic treatment method of an inner surface of the three-screw pump machine barrel, and belongs to the technical field of material surface modification. The three-screw pump machine barrel can be used for solving the problems that the existing three-screw pump rubber bushing has high temperature sensitivity, is easy to age and has aeolotropy. The three-screw pump machine barrel is characterized in that a ceramic membrane is plated on the inner wall of the three-screw pump machine barrel, the ceramic membrane is more than 800HV in hardness and more than 50mu m in thickness, and the ceramic membrane has the characteristics of high precision, high abrasion resistance, no sensitivity to temperature change and difficulty in chemical reaction with acid-base media. The ceramic treatment method of the inner surface of the three-screw pump machine barrel comprises the following steps: firstly electrifying the pump machine barrel filled with an alkaline working solution by use of a pulsed power supply, so as to generate a Al2O3 film on the inner wall of the pump machine barrel by virtue of the electrochemical reaction, and scanning the surface of the generated film by use of a laser so as to enable the surface of the film to be flattened. The method is suitable for ceramic treatment of the surface of the pump machine barrel.

Description

technical field [0001] The invention belongs to the technical field of material surface modification. Background technique [0002] As one of the most commonly used types of pumps, three-screw pumps are widely used in petroleum, machinery, metallurgy and many other fields. During the working process of the three-screw pump, through the engagement of the screw grooves on the main screw and the driven screw and their cooperation with the inner surface of the bushing, a multi-stage sealed chamber is formed between the inlet and the outlet of the pump, and these continuous seals The chamber conveys liquid from the inlet to the outlet of the pump, creating a continuous, smooth, axially moving pressure liquid. The driving screw in the middle of the three-screw pump is driven to rotate by the prime mover, and the rotation speed is about 1450-2900r / min. The screw bushing is an important component of the three-screw pump, which bears the fluid pressure generated by the transmission...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04C15/00C25D11/04C25D11/18
Inventor 狄士春杨俊杰
Owner HARBIN INST OF TECH
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