4 Research in materials science and preparation technology. He has published 4 monographs on electrostatic technology, issued nearly 50 academic papers, won 1 national patent, and completed 2 provincial scientific research projects. Address: 146 Mailbox, Northwest Textile Institute of Textiles, Xi'an, Shaanxi Province, 710048; Telephone mud pump damage form report damage limit and overhaul method Wang Ximing's analysis. For cylinder single-acting mud pump crankshaft shaft head wear amount gear fixed string tooth thickness reduction amount bearing clearance increase liquid cylinder main force connecting parts wearing parts and other scraps set a reasonable limit. The main repair methods of the pump are described in detail, including new processes such as disassembly and repair welding, roll peening and assembly.
After the overhaul, the standard cylinder pump has the same performance as the new pump. The price of the overhaul pump is only 40% of the new pump price. It is very beneficial to reduce the drilling cost of the oilfield and improve the economic benefit.
Minister of Process Technology, Grade Engineer, Machinery Manufacturing Company, Oil Chemical Machinery General Factory. He presided over the manufacture of a 50-drum vacuum filter and won the provincial scientific and technological progress award. Address: No. 194, Xijin West Road, Qilihe District, Lanzhou City, Zip Code 7,50; Measures to improve the fatigue resistance of bolts. The bolts used on the party's pressure vessels are always in the state of repeated tensile stress under the action of alternating force. The improvement of its anti-fatigue strength has become a research class. In this paper, the force state of the combined bolt and nut is firstly analyzed in theory, and the stress is made. It is concluded that the taper of the nut is cut at the lower end of the nut, and the stress at the contact portion of the nut is shifted upwards. The thread is driven evenly to provide fatigue resistance.
In the manufacturing, the verticality of the combined hole is controlled, and the bolt pair avoids the bending stress, and the bolt fatigue resistance is also improved. The load bending stress is also applied to this.
For the manufacture of bolts, it is also an effective measure to improve the anti-fatigue strength of the plugs from the control of the roughness of the hand and the rolling process to smooth and strengthen the surface of the plug. This article details the rolling process and its technical parameters and other matters. Prestressing is calculated by the above measures for assembly. In the practice, the test data was obtained, which proved that the measure was effective, and the anti-fatigue strength of the bolt pair was improved by 15.
Director of Electrical Engineering Division of the General Machinery Manufacturing Company, engineer. Participate in the manufacturing of major national refinery equipment such as over-pressure hydrogenation reactors. Address: No.194, Xijin West Road, Qilihe District, Lanzhou City, Zip Code 730050; Telephone 0931 Double Arc Gear Hob Profile Geometric Model Jiang Ruifeng Our factory has widely used double arc gear transmission in the production of pumping units and other equipment. The tooth shape is 29408, and has achieved good practical results.
The coordinate equation simplifies the equation of the trimming section of the transition section of the working section, which is convenient and practical. The full text of the formula 36, ​​the calculation example 3, Zhang.
The purpose and function of the formula is to provide the theoretical data for the double arc gear hob during the design and manufacturing inspection process; to input the accurate coordinate value of the CNC machine tool during the hob or gear machining, and to improve the hob tooth shape or The geometrical accuracy of the gear tooth shape; provide data for the final inspection; can be used as the basic formula when programming in the computer, and can calculate the coordinate value according to the formula and accurately draw the geometric template for testing.
Engineer, Department of Process Technology, Stone Factory Machinery Manufacturing Company. Participated in the manufacturing of major products such as 2.41 2.4, wind tunnel. Address Modification of Waterborne Acrylic Resin in Qilihe District, Lanzhou City Zhu Chuanfang Chen Yifeng, resin is a base material for coating inks. In recent years, with the continuous modification of resins, the structure of new products of coating inks has also become very large. Changes have added color to daily life such as printing and building homes. The development of non-toxic, high-efficiency, energy-saving and energy-saving is the general trend of current product development. Therefore, the development of non-polluting, water-based, solidified, solvent-free, environmentally-friendly resins for coatings and inks is the main direction of development today.
At present, film-forming materials for aqueous coating inks include water-based alkyd resin, amino resin, phenolic resin, polyester resin, epoxy resin, acrylic resin, and the like.
Since waterborne polyacrylates have the advantages of stable gloss, good rheological properties and good surface adsorption properties, they are more promising for use in ink coatings. In this paper, we use acrylic acrylate methacrylate methacrylate as the base material, in the presence of ammonium persulfate peroxide benzoyl peroxide, water or alcohol as solvent for polymerization, adding styrene vinyl acetate, etc. Different kinds of water-soluble acrylic modified resins were synthesized and their properties were measured. As a result, the viscosity of the resin, the swellability, the acid-base luminosity and the like of the film after the water-soluble solubility of the resin were all the properties of the solvent-based acrylate for the ink coating. In the study we found that the properties of the resin are related to the uniformity of the polymerization, the hydrophilic group and the molecular weight and the neutralization conditions. The time and temperature of the reaction of the amount of the initiator in the feed sequence is the main factor determining the performance of the product.
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