發(fā)布時間：2019-05-15 15:46

【摘要】：渦旋壓縮機是一種新型高效、低噪、高可靠性的容積式壓縮機,相比其它形式的壓縮機在很多方面有著較大的優(yōu)勢,特別是在小排氣量、低壓縮比的情況下,渦旋壓縮機的性能更為突出。目前渦旋壓縮機的應用領(lǐng)域日趨廣泛,如制冷空調(diào)、動力工程、石油化工等領(lǐng)域。渦旋壓縮機是天然氣增壓裝置的主要部件之一,供油系統(tǒng)為渦旋壓縮機提供了良好的密封、潤滑、冷卻和降噪聲等作用,然而當機組內(nèi)潤滑油的量不足或過量時會產(chǎn)生副作用:潤滑油過量就會產(chǎn)生攪拌、積存等副作用,會使壓縮機的功耗增加,壓縮性能降低;潤滑油的流量不足,摩擦副產(chǎn)生的熱量就不能被及時帶走,就會產(chǎn)生熱裂紋,從而引起泄漏。到目前為止,大部分的研究主要集中在噴油對渦旋壓縮機性能的影響,而對潤滑油的狀態(tài)及供油系統(tǒng)的油量對渦旋壓縮機的性能影響尚沒有進行深入的研究。 本文整體考慮渦旋壓縮機供油系統(tǒng),應用流體力學和潤滑理論,建立了渦旋壓縮機供油系統(tǒng)流量分配模型,并運用等價電路法對分配模型進行了簡化,具體步驟為:由伯努力方程得出油在管道中的流動壓降數(shù)學模型,進而推導出電機轉(zhuǎn)速與壓降之間、電機轉(zhuǎn)速與耗油量之間的數(shù)學模型及內(nèi)部潤滑系統(tǒng)的功耗計算公式。在所得結(jié)論的基礎(chǔ)上對主要輔助設(shè)備的阻力損失進行了計算。最后對增壓裝置的電機選用和齒輪泵的選用進行了設(shè)計計算。 以機械密封動環(huán)與靜環(huán)嚙合面之間的摩擦副及密封機理為基礎(chǔ),對機械密封各主要參量給出了計算公式,建立了沖洗量與電機轉(zhuǎn)速之間的數(shù)學模型,在轉(zhuǎn)速較低的情況下,忽略密封件與流體攪拌產(chǎn)生和軸承側(cè)傳入的熱量,可對模型進行簡化。最后對機械密封產(chǎn)生的熱量給出了不同的算法。 根據(jù)相關(guān)數(shù)學模型,應用simulink軟件包模塊圖并將其封裝成仿真模型,將這些子系統(tǒng)仿真模型按照工作過程及相關(guān)理論做了有機的連接,進行了仿真研究。由研究結(jié)果可知:第二循環(huán)油路的仿真結(jié)果和實驗結(jié)果基本一致,從而驗證了壓降與電機轉(zhuǎn)速之間的數(shù)學模型的正確性和可行性;第一循環(huán)回路耗油量與仿真結(jié)果相吻合。研究結(jié)果為渦旋壓縮機的供油量的控制提供了一定的理論依據(jù)。 以仿真結(jié)果為理論依據(jù),對供油系統(tǒng)設(shè)計了控制方案,實驗方案,本文對后續(xù)工作提出展望,使得渦旋壓縮機的工作性能進一步提高,在渦旋壓縮機供油系統(tǒng)向著智能化發(fā)展方向的研究具有一定的參考價值。
[Abstract]:The scroll compressor is a new type of high-efficiency, low-noise and high-reliability volumetric compressor. Compared with other types of compressors, the scroll compressor has a great advantage in many respects, especially in the case of small air displacement and low compression ratio, the performance of the scroll compressor is more prominent. At present, the application field of the scroll compressor is becoming more and more extensive, such as refrigeration air-conditioning, power engineering, petrochemical industry and other fields. the scroll compressor is one of the main components of the natural gas pressurization device, and the oil supply system provides good sealing, lubrication, cooling and noise reduction and the like for the scroll compressor, The side effects such as accumulation can increase the power consumption of the compressor, the compression performance is reduced, the flow rate of the lubricating oil is insufficient, the heat generated by the friction pair cannot be taken away in time, and the heat crack can be generated, and the leakage can be caused. So far, most of the research has focused on the effect of oil injection on the performance of the scroll compressor, and the influence of the state of the lubricating oil and the oil quantity of the oil supply system on the performance of the scroll compressor has not been deeply studied. In this paper, the flow distribution model of the oil supply system of the scroll compressor is established by considering the oil supply system of the scroll compressor, the fluid mechanics and the lubrication theory, and the equivalent circuit method is used to simplify the distribution model. The mathematical model of the flow pressure drop between the speed and pressure drop of the motor, the mathematical model between the speed of the motor and the fuel consumption and the power consumption of the internal lubrication system are derived. Formula. The resistance loss of the main auxiliary equipment is made on the basis of the obtained conclusion. Finally, the selection of the motor and the selection of the gear pump are designed. Based on the friction pair and the sealing mechanism between the mechanical seal ring and the engaging surface of the stationary ring, the formulas for calculating the main parameters of the mechanical seal are given, and the mathematical model between the flushing quantity and the rotating speed of the motor is established. In the low case, it is possible to ignore the heat generated by the seal and the fluid agitation and the side of the bearing, The type is simplified, and the heat generated by the mechanical seal is finally given. according to the relevant mathematical model, the multi-system simulation model is applied to the simulation model according to the relevant mathematical model, and the simulation models of the subsystems are organically connected according to the working process and the related theory The simulation results show that the simulation results of the second circulating oil circuit are consistent with the experimental results, and the correctness and feasibility of the mathematical model between the pressure drop and the motor speed are verified. The results of the study are consistent with the simulation results. The results of the study are as follows: the control of the oil supply quantity of the scroll compressor Based on the simulation results, the control scheme and experimental scheme of the oil supply system are designed, and the prospect of the follow-up work is put forward in this paper, so that the scroll compression The working performance of the machine is further improved, and the oil supply system of the scroll compressor is in the direction of intelligent development
【學位授予單位】：蘭州理工大學
【學位級別】：碩士
【學位授予年份】：2011
【分類號】：TH45

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