旋葉式壓縮機設計理論研究
發(fā)布時間：2018-09-01 18:53
【摘要】：本論文項目為機械傳動國家重點實驗室開放基金資助(項目編號：SKLMT-KFKT-200905)。 目前，旋葉式壓縮機已成為全球汽車空調(diào)壓縮機的主流。對于壓縮機氣缸型線設計，原有的適用于滑片對心布置的旋葉式壓縮機的氣缸型線設計理論缺乏通用性，本研究突破傳統(tǒng)的設計理念，將氣缸型線的設計直接歸結為滑片運動規(guī)律模型的建立，對旋葉式壓縮機的密封性和工作腔容積進行分析，在保證滑片運動動力特性曲線光滑、連續(xù)的前提下，生成一條使得旋葉式壓縮機性能更優(yōu)的多項式滑片運動規(guī)律曲線，根據(jù)滑片運動與氣缸型線的數(shù)學關系，得到滿足滑片運動規(guī)律的氣缸型線。對于壓縮機的背壓腔模型設計，運用反求的思想，將背壓腔幾何形狀的設計歸結為背壓數(shù)學模型的建立，，背壓數(shù)學模型主要是控制滑片頂部與氣缸內(nèi)壁的接觸力，從而降低摩擦功率損耗和改善滑片受力狀態(tài)，提高壓縮機的性能。論文研究工作主要包括以下研究內(nèi)容： 分析了滑片偏心式旋葉式壓縮機的優(yōu)勢，運用等距曲線的包絡原理，將滑片的運動簡化為滑片頂部主圓弧圓心的運動，對滑片偏心式旋葉式壓縮機建立起滑片運動學模型，導出了滑片位移、滑片速度及滑片加速度與轉子轉角的關系，并由獲得的理論進行了仿真分析，該方法避免了求解滑片接觸點的復雜過程，同時具有求解的精確性，對廣泛應用的偏心式旋葉式壓縮機滑片的運動提出了科學符實的理論計算方法。利用MATLAB對其進行數(shù)值仿真分析，證明其結果的準確性。由分析可知，由于偏心式滑片與對心式滑片運動學特征有較大的差異，對滑片偏心式旋葉式壓縮機的滑片運動分析，不能簡單地采用對心式滑片的分析方法，由簡化方法計算分析所獲得的結論不能表明所研究氣缸型線具有的運動學和動力學特性。 將旋葉式壓縮機氣缸型線的設計直接歸結為滑片運動規(guī)律的建立，對旋葉式壓縮機的密封性和工作腔容積進行分析，在保證滑片運動動力特性曲線光滑、連續(xù)的前提下，生成一條使得旋葉式壓縮機性能更優(yōu)的多項式滑片運動規(guī)律曲線，根據(jù)滑片運動與氣缸型線的數(shù)學關系，得到滿足滑片運動規(guī)律的氣缸型線。與傳統(tǒng)簡諧氣缸型線旋葉式壓縮機相比，由多項式滑片運動規(guī)律曲線轉化得到的旋葉式壓縮機在保證滑片運動動力特性曲線光滑、連續(xù)的前提下，使得壓縮機氣缸與轉子接觸點處有更好的密封性，容積效率更高，在結構尺寸參數(shù)相同的條件下有更大的吸氣量和排氣量。 對滑片偏心式旋葉式壓縮機基元容積進行全新建模，并進行仿真分析，對新型旋葉式壓縮機與傳統(tǒng)旋葉式壓縮機進行基元容積的比較研究。表明在結構尺寸參數(shù)相同的條件下，新型旋葉式壓縮機具有比傳統(tǒng)簡諧氣缸型線旋葉式壓縮機更大的吸氣量和排氣量。 在保證滑片頂部與氣缸內(nèi)壁接觸的前提下，盡量減少接觸力，有助于降低摩擦功耗，提高壓縮機性能。設定滑片頂部與氣缸內(nèi)壁接觸力為0，對滑片進行受力分析，并分別分析了各力隨轉子轉速的變化，重點分析了與接觸力密切相關的滑片背壓力的變化情況，可知轉子轉速對滑片所受滑片槽的約束力影響不大，而滑片背壓力隨轉子轉速增大而減少。為滑片背壓腔的合理設計打下理論基礎。 通過將整個設計分析過程程序化，并建立一套基于C++Builder的旋葉式壓縮機輔助設計分析系統(tǒng)，通過數(shù)據(jù)的相互流通，設計參數(shù)的改變可以非常直觀的從面向對象的界面中反映出來，極大的簡化了設計分析過程，加快了研發(fā)進度，為旋葉式壓縮機新產(chǎn)品開發(fā)與分析提供了有力的工具。
[Abstract]:This paper is funded by the Open Fund of the State Key Laboratory of Mechanical Transmission (Project No. SKLMT-KFKT-200905).
At present, vane compressor has become the mainstream of automotive air conditioning compressor in the world. For the cylinder profile design of compressor, the original cylinder profile design theory for vane-centric compressor is lack of generality. This study breaks through the traditional design concept and directly attributes the cylinder profile design to the slider motion law. On the premise of ensuring smooth and continuous dynamic characteristic curve of the slider, a polynomial slider motion law curve which makes the performance of the rotary vane compressor better is generated. According to the mathematical relationship between the slider motion and the cylinder profile, the slider is satisfied. For the design of the back pressure chamber model of the compressor, the design of the back pressure chamber geometry is attributed to the establishment of the back pressure mathematical model. The back pressure mathematical model is mainly to control the contact force between the top of the slider and the inner wall of the cylinder, so as to reduce the friction power loss and improve the stress state of the slider. The research work of the compressor mainly includes the following research contents:
The advantages of eccentric vane rotary compressor are analyzed. The motion of the vane is simplified as the motion of the center of the main arc at the top of the vane by using the envelope principle of the equidistant curve. The kinematic model of the vane is established for the eccentric vane rotary compressor. The relationship between the displacement of the vane, the speed of the vane and the acceleration of the vane and the rotor angle is derived. The obtained theory is simulated and analyzed. The method avoids the complicated process of calculating the contact point of the slider and has the accuracy of the solution. A scientific and practical theoretical calculation method is proposed for the motion of the slider of eccentric rotary vane compressor which is widely used. From the analysis, it can be seen that because of the great difference between eccentric slider and concentric slider in kinematics characteristics, the method of analyzing the slider motion of eccentric rotary vane compressor can not be simply used to analyze the slider motion. The conclusion obtained by the simplified method can not show the kinematics and the kinematics of the cylinder profile studied. Dynamic characteristics.
The design of cylinder profile of rotary vane compressor is directly attributed to the establishment of sliding vane motion law. The sealing property and working chamber volume of rotary vane compressor are analyzed. A polynomial sliding vane motion law curve which makes the performance of rotary vane compressor better is generated on the premise of smooth and continuous sliding vane motion dynamic characteristic curve. According to the mathematical relationship between the slider motion and the cylinder profile, the cylinder profile which satisfies the slider motion law is obtained. Compared with the traditional simple harmonic Cylinder Profile rotary vane compressor, the rotary vane compressor transformed from the polynomial slider motion law curve ensures the smooth and continuous dynamic characteristic curve of the slider motion and makes the compressor gas. The contact point between cylinder and rotor has better sealing performance, higher volumetric efficiency, and larger suction and exhaust capacity under the same structural size parameters.
A new model for the unit volume of a sliding vane eccentric vane rotary compressor is developed and simulated. A comparison of the unit volume between a new type of vane rotary compressor and a traditional vane rotary compressor is made. The results show that the new type of vane rotary compressor has a better performance than the traditional simple harmonic cylinder type vane rotary compressor under the same structure and size parameters. Larger intake and exhaust volume.
On the premise of guaranteeing the contact between the top of the slider and the inner wall of the cylinder, the contact force is reduced as far as possible, which is helpful to reduce the friction power consumption and improve the performance of the compressor. The variation of back pressure shows that the rotor speed has little effect on the restraint force of the slider groove, but the back pressure of the slider decreases with the increase of the rotor speed.
By programming the whole design and analysis process and establishing a set of CAD and analysis system of rotary vane compressor based on C++ Builder, the change of design parameters can be reflected intuitively from the object-oriented interface through the mutual flow of data, which greatly simplifies the design and analysis process, speeds up the development of rotary vane. The new product development and analysis of compressor provide a powerful tool.
【學位授予單位】：重慶大學
【學位級別】：碩士
【學位授予年份】：2012
【分類號】：TH45;U463.851
本文編號：2218053
[Abstract]:This paper is funded by the Open Fund of the State Key Laboratory of Mechanical Transmission (Project No. SKLMT-KFKT-200905).
At present, vane compressor has become the mainstream of automotive air conditioning compressor in the world. For the cylinder profile design of compressor, the original cylinder profile design theory for vane-centric compressor is lack of generality. This study breaks through the traditional design concept and directly attributes the cylinder profile design to the slider motion law. On the premise of ensuring smooth and continuous dynamic characteristic curve of the slider, a polynomial slider motion law curve which makes the performance of the rotary vane compressor better is generated. According to the mathematical relationship between the slider motion and the cylinder profile, the slider is satisfied. For the design of the back pressure chamber model of the compressor, the design of the back pressure chamber geometry is attributed to the establishment of the back pressure mathematical model. The back pressure mathematical model is mainly to control the contact force between the top of the slider and the inner wall of the cylinder, so as to reduce the friction power loss and improve the stress state of the slider. The research work of the compressor mainly includes the following research contents:
The advantages of eccentric vane rotary compressor are analyzed. The motion of the vane is simplified as the motion of the center of the main arc at the top of the vane by using the envelope principle of the equidistant curve. The kinematic model of the vane is established for the eccentric vane rotary compressor. The relationship between the displacement of the vane, the speed of the vane and the acceleration of the vane and the rotor angle is derived. The obtained theory is simulated and analyzed. The method avoids the complicated process of calculating the contact point of the slider and has the accuracy of the solution. A scientific and practical theoretical calculation method is proposed for the motion of the slider of eccentric rotary vane compressor which is widely used. From the analysis, it can be seen that because of the great difference between eccentric slider and concentric slider in kinematics characteristics, the method of analyzing the slider motion of eccentric rotary vane compressor can not be simply used to analyze the slider motion. The conclusion obtained by the simplified method can not show the kinematics and the kinematics of the cylinder profile studied. Dynamic characteristics.
The design of cylinder profile of rotary vane compressor is directly attributed to the establishment of sliding vane motion law. The sealing property and working chamber volume of rotary vane compressor are analyzed. A polynomial sliding vane motion law curve which makes the performance of rotary vane compressor better is generated on the premise of smooth and continuous sliding vane motion dynamic characteristic curve. According to the mathematical relationship between the slider motion and the cylinder profile, the cylinder profile which satisfies the slider motion law is obtained. Compared with the traditional simple harmonic Cylinder Profile rotary vane compressor, the rotary vane compressor transformed from the polynomial slider motion law curve ensures the smooth and continuous dynamic characteristic curve of the slider motion and makes the compressor gas. The contact point between cylinder and rotor has better sealing performance, higher volumetric efficiency, and larger suction and exhaust capacity under the same structural size parameters.
A new model for the unit volume of a sliding vane eccentric vane rotary compressor is developed and simulated. A comparison of the unit volume between a new type of vane rotary compressor and a traditional vane rotary compressor is made. The results show that the new type of vane rotary compressor has a better performance than the traditional simple harmonic cylinder type vane rotary compressor under the same structure and size parameters. Larger intake and exhaust volume.
On the premise of guaranteeing the contact between the top of the slider and the inner wall of the cylinder, the contact force is reduced as far as possible, which is helpful to reduce the friction power consumption and improve the performance of the compressor. The variation of back pressure shows that the rotor speed has little effect on the restraint force of the slider groove, but the back pressure of the slider decreases with the increase of the rotor speed.
By programming the whole design and analysis process and establishing a set of CAD and analysis system of rotary vane compressor based on C++ Builder, the change of design parameters can be reflected intuitively from the object-oriented interface through the mutual flow of data, which greatly simplifies the design and analysis process, speeds up the development of rotary vane. The new product development and analysis of compressor provide a powerful tool.
【學位授予單位】：重慶大學
【學位級別】：碩士
【學位授予年份】：2012
【分類號】：TH45;U463.851
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