Problems and Solutions in Renovation of the Rotors of Screw Compressors by Combined Technologies

Tarelnyk, Viacheslav; Konoplyanchenko, E. V.; Kosenko, P V; Марцинковский, В. С.

doi:10.1007/s10556-017-0378-7

Cited by 33 publications

(8 citation statements)

References 1 publication

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“…Tin bronze is a relatively good thermal conductivity material, as the bearing material can quickly dissipate the heat generated by friction, which is conducive to improving the thermal stability and durability of the bearing [17,18]. However, the tribological properties of tin bronze are limited in some applications.…”

Section: The Substrate and Electrodes Materialsmentioning

confidence: 99%

The Characterization of Soft Antifriction Coating on the Tin Bronze by Electro-spark Alloying

Zhengchuan¹,

Коноплянченко²,

Tarelnyk³

et al. 2023

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Soft materials such as silver, copper and Babbitt SnSb11Cu6 were deposited on the surface of tin bronze by electro spark alloying (ESA) to form the antifriction coating. The data of the antifriction coating were tested by electronic balance, three-dimensional optical profilometer, scanning electron microscope (SEM), energy dispersive spectrometer (EDS), X-ray diffractometer (XRD), Vickers microhardness tester and tribometer. The mass gain, roughness, thickness, surface morphology and phase composition, cross-section and element distribution, microhardness and tribological properties of the antifriction coating were analyzed. The results show that the grain size of the antifriction coating is fine and the metallurgical bonding between the coating and the substrate is good. The surface of each substrate is composed of three layers of coating. The optimal parameters of electro spark alloying are as follows: the discharge voltages of Ag, Cu and Babbitt alloy coatings are 60 V, 60 V and 30 V respectively, the energy storage capacitance is 150 μF, 150 μF and 90 μF respectively, and the working efficiency is 3 min/cm2, 3 min/cm2 and 4 min/cm2 respectively. Under the optimized parameters, the average mass transfer efficiency is 54.4 mg/cm2, the average surface roughness is 32.3 μm, and the maximum thickness is about 160 μm. The surface friction coefficient of the soft antifriction coating is 55.6 % of that of the tin bronze substrate. The main wear mechanisms of the soft antifriction coating prepared by electro spark alloying technique are plastic deformation accompanied by slight polishing.

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Section: The Substrate and Electrodes Materialsmentioning

confidence: 99%

The Characterization of Soft Antifriction Coating on the Tin Bronze by Electro-spark Alloying

Zhengchuan¹,

Коноплянченко²,

Tarelnyk³

et al. 2023

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“…abradable seals reduce clearances and limit the risk of damage to the rotating or stationary member. Labyrinth seals have been replaced by honeycomb seals when some rotor instability problems have occurred in high-pressure compressors [13]. The new concept of non-abradable seals was come up, which are made up of soft material and the stainless steel manufactures the teeth so at one instinct the deformation in the teeth will occur.…”

Section: Solutions For the Better Efficiency Of The Compressormentioning

confidence: 99%

Trends in tribological behaviour of materials for compressors

Patel

Shiva

Kataray

et al. 2022

J. Phys.: Conf. Ser.

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This review accumulates information from various research works about the preferable manufacturing process, process parameters, parts of the compressor, working principle, material, and critical issues with some of the solutions that might be possible in the era of future industry. In addition, some work is also done on the tribological trends in the compressor. In this paper, detailed information has been gathered about the compressor parts and their working principle. A detailed analysis has been done on the material used to manufacture the compressor. Some details have been shared about preventing the loss to the compressor when it is in the application mode. As per this paper, PTFE/MoS2, FC, PEEK/Ceramic materials, mica-filled tetrafluoroethylene are advanced materials used for the compressor. Protective layers can be made on the parts to prevent some functional loss. Numerous studies have brought about great advancements in compressor performance, but many remain to be discovered. With n-TiO2 and n-MnO2, ZDDP (zinc disulfide) should be increased for antifriction properties. Some research has proven that CO2 can improve the tribological performance of two interacting surfaces by forming a lubricating carbonate layer that reduces friction and wears. New lubricating oils are showing promising results, but with the gradual depletion of natural oil resources, efforts have to be made to make various oils obtained from sources other than oil reserves or petroleum. A completely oil-free compressor with no lubrication in the crankcase and no lubrication in the other components dry oil-free air supply may be accomplished by employing various oil-less compressor technologies such as scroll water-injected screw, two-stage dry screw, and so on. In the 21st century, it aims to maximize energy savings from air compressors. It is critical to operating at a compression level that matches the amount of air consumption (optimal volume) and to avoid operating at a compression level that is greater than necessary. The conclusion can be obtained that understanding for the compressor will be established, and some tribological issues will be solved with new technology and material.

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“…Theoretical issues related to the operation of jet pumps in oil wells were considered in the works in [21,22]. Practical issues related to the efficiency and reliability of pumping equipment are considered in [23][24][25]. A case of placing the jet pump above the dynamic level of the well is also used in order to extract gas from its annulus, which made it possible to stabilize the dynamic level and increase the reliability of the ESP system [26].…”

Section: State Of the Current Development Of The Problem And Formulating A Research Taskmentioning

confidence: 99%

Strategy of Compatible Use of Jet and Plunger Pump with Chrome Parts in Oil Well

et al. 2021

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During oil fields operation, gas is extracted along with oil. In this article it is suggested to use jet pumps for utilization of the associated oil gas, burning of which causes environmental degradation and poses a potential threat to the human body. In order to determine the possibility of simultaneous application of a sucker-rod pump, which is driven by a rocking machine, and a jet pump (ejector) in the oil well, it is necessary to estimate the distribution of pressure along the borehole from the bottomhole to the mouth for two cases: when the well is operated only be the sucker-rod pump and while additional installation of the oil-gas jet pump above its dynamic level. For this purpose, commonly known methods of Poettman-Carpenter and Baksendel were used. In addition, the equations of high-pressure and low-pressure oil-gas jet pumps were obtained for the case, when the working stream of the jet pump is a gas-oil production mixture and the injected stream is a gas from the annulus of the well. The values which are included in the resulting equations are interrelated and can only be found in a certain sequence. Therefore, a special methodology has been developed for the practical usage of these equations in order to calculate the working parameters of a jet pump based on the given independent working parameters of the oil well. Using this methodology, which was implemented in computer programs, many operating parameters were calculated both for the well and for the jet pump itself (pressures, densities of working, injected and mixed flows, flow velocities and other parameters in control sections). According to the results of calculations, graphs were built that indicate a number of regularities during the oil well operation with such a jet pump. The main result of the performed research is a recommendation list on the choice of the oil-gas jet pump location inside the selected oil well and generalization of the principles for choosing the perfect location of such ejectors for other wells. The novelty of the proposed study lays in a systematic approach to rod pump and our patented ejector pump operation in the oil and chrome plating of pump parts. The result of scientific research is a sound method of determining the rational location of the ejector in the oil well and the calculation of its geometry, which will provide a complete selection of petroleum gas released into the annulus of the oil well. To ensure reliable operation of jet and plunger pumps in oil wells, it is proposed to use reinforcement of parts (bushings, plungers, rods, etc.) by electrochemical chromium plating in a flowing electrolyte. This has significantly increased the wear resistance and corrosion resistance of the operational surfaces of these parts and, accordingly, the service life of the pumps. Such measures will contribute to oil production intensification from wells and improve the environmental condition of oil fields.

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Problems and Solutions in Renovation of the Rotors of Screw Compressors by Combined Technologies

Cited by 33 publications

References 1 publication

The Characterization of Soft Antifriction Coating on the Tin Bronze by Electro-spark Alloying

The Characterization of Soft Antifriction Coating on the Tin Bronze by Electro-spark Alloying

Trends in tribological behaviour of materials for compressors

Strategy of Compatible Use of Jet and Plunger Pump with Chrome Parts in Oil Well

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