Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Casting method of hollow crankshaft for mud pump

A hollow crankshaft and mud pump technology, applied in casting molding equipment, molds, mold components, etc., can solve the problems of crankshaft eccentricity, uneven wall thickness of floating cores, unreasonable riser setting, shrinkage holes, etc. Improve the quality of castings, improve the qualified rate of flaw detection, and prevent the sand core from breaking or deforming

Active Publication Date: 2016-03-02
BAOJI PETROLEUM MASCH CO LTD
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a casting method for hollow crankshafts for mud pumps, which solves the problem of local shrinkage or porosity in crankshafts in the prior art due to eccentric and floating cores, uneven wall thickness, or unreasonable riser settings. defect problem

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Casting method of hollow crankshaft for mud pump
  • Casting method of hollow crankshaft for mud pump
  • Casting method of hollow crankshaft for mud pump

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0058] Made F-1300 mud pump crankshaft, drawing number AH130101-02080001, produced a batch of serial numbers 12463, 12579, 12473, 12520, 12492, a total of 5 pieces, flaw detection report number: BOMCOJ69-MT-NA055-1301, flaw detection result: qualified.

[0059] The same production sequence number is 12384, 12476, a total of 2 pieces, flaw detection report number: BOMCOJ69-MT-NA025-1302, flaw detection result: qualified;

[0060] The production sequence number is 12557, 12537, a total of 2 pieces, flaw detection report number: BOMCOJ69-MT-NA030-1302, flaw detection result: qualified;

[0061] The production sequence number is 12531, 12555, a total of 2 pieces, flaw detection report number: BOMCOJ69-MT-NA031-1302, flaw detection result: qualified.

[0062] During the trial production process, the qualification rate of the crankshaft reached over 98%, which ensured the quality of the key main bearing parts of the mud pump.

[0063] The hollow crankshaft produced by the method of...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
strengthaaaaaaaaaa
Login to View More

Abstract

The invention discloses a casting method of a hollow crankshaft of a slurry pump. A casting model is utilized. The casting method comprises the following steps: manufacturing an actual sample and a core box of the hollow crankshaft; installing a sand discharge box, a large open riser, a slag collector and a pouring channel, opening open and hidden air holes in a sand mold, and arranging anti-cracking ribs in a turning part I and a turning part III; manufacturing a sand core and a core head mold body, manufacturing a core bar main rod, forming two groups of via holes in the core bar main rod, and welding a steel round positioning ring in each via hole; welding multiple reinforcing supports on the core bar main rod by reinforcing steel bars, winding a straw rope and a gas exhaust rope on the core bar main rod, putting a core bar into the core box, and filling sand for hardening; spraying paint; assembling the box; pouring; opening the box and spraying sand; polishing and repairing; normalizing; carrying out secondary sand spraying; and processing shaft holes in two end heads of the hollow crankshaft, thereby casting the hollow crankshaft of the slurry pump. The method provided by the invention can effectively prevent the structure defect of shrinkage cavity or shrinkage porosity partially.

Description

technical field [0001] The invention belongs to the technical field of mechanical equipment casting, and relates to a casting method of a hollow crankshaft for a mud pump. Background technique [0002] The mud pump used in petroleum drilling equipment is very large, and the hollow crankshaft is the most important transmission part in the mud pump. The material is ZG35CrMoA. It has a complex structure and a large size. figure 1 As shown, 120 degrees each other such as figure 2 As shown, the middle design is hollow and the shape is complex as figure 1 shown. [0003] Since the casting process design and production of the hollow crankshaft are very difficult, many casting process schemes have been adopted for a long time, but the hollow crankshaft blanks often have uneven wall thickness due to eccentric cores and floating cores, or due to Unreasonable riser settings lead to local shrinkage cavities and shrinkage porosity, resulting in extremely high waste rates. It is urgen...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): B22C9/22B22C9/08
Inventor 李继峰李保峰马崇峰
Owner BAOJI PETROLEUM MASCH CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com