本文選題：磚壓機(jī) + FLUENT��； 參考：《廣東工業(yè)大學(xué)》2015年碩士論文

【摘要】：二通插裝閥、充液閥和集成塊是陶瓷磚壓機(jī)液壓系統(tǒng)中三種重要基礎(chǔ)元件。二通插裝閥閥芯在運(yùn)動(dòng)過程中的運(yùn)動(dòng)特性、充液閥通流能力和集成塊內(nèi)部孔道能量損失直接影響到陶瓷磚壓機(jī)能耗、快速性和穩(wěn)定性�；趪�(guó)家產(chǎn)業(yè)結(jié)構(gòu)升級(jí)為提高企業(yè)核心競(jìng)爭(zhēng)力,企業(yè)需要生產(chǎn)出更節(jié)能、更高效、控制更穩(wěn)定的陶瓷磚壓機(jī),因此對(duì)壓機(jī)上插裝閥、充液閥、集成塊的研究具有重要意義。本文以佛山恒力泰機(jī)械有限公司YP3500陶瓷磚壓機(jī)液壓系統(tǒng)作為研究對(duì)象,對(duì)二通插裝閥、充液閥和集成塊孔道的流場(chǎng)進(jìn)行分析,為企業(yè)在閥與集成塊孔道的結(jié)構(gòu)設(shè)計(jì)安裝方面提供具有實(shí)用價(jià)值參考依據(jù)。1)建立了插裝閥穩(wěn)態(tài)液動(dòng)力的數(shù)學(xué)模型,并分析了基于多相流陶瓷磚壓機(jī)充液閥的研究方法。理論計(jì)算出插裝閥過流面積、穩(wěn)態(tài)液動(dòng)力和通流量,及充液閥混合相的密度和通流量。并對(duì)插裝閥穩(wěn)態(tài)液動(dòng)力、多相流的影響因素進(jìn)行分析,為仿真模型的驗(yàn)證提供理論基礎(chǔ)。2)建立插裝閥、充液閥及集成塊流道的三維幾何模型,運(yùn)用Gambit進(jìn)行網(wǎng)格劃分,導(dǎo)入Fluent中對(duì)流體模型進(jìn)行參數(shù)設(shè)置和求解仿真。通過仿真研究得到如下結(jié)論：(1)在相同壓差下隨著插裝閥開度的增大,其壓力場(chǎng)、速度矢量場(chǎng)在閥芯與閥套的過流面處變得復(fù)雜,流速分離嚴(yán)重,流動(dòng)更加不均勻；工藝容腔處形成漩渦變大。并由仿真得出：插裝閥在不同開度及壓差下穩(wěn)態(tài)液動(dòng)力和通流量值。(2)相同壓差下氣體體積率越大,液壓油通過充液閥流量越大,動(dòng)梁下行速度越快,但是磚壓機(jī)穩(wěn)定性越差。改變壓差和氣體體積率大小對(duì)充液閥過流面壓力場(chǎng)、速度場(chǎng)及氣相分布趨勢(shì)影響不大;從充液閥入口圓孔下來的流體在閥中間位置產(chǎn)生漩渦,能量損失比較大,因此需要后續(xù)結(jié)構(gòu)優(yōu)化過程中消除漩渦區(qū)。(3)分析了集成塊孔道拐彎處的流場(chǎng)分布情況,發(fā)現(xiàn)：隨著壓差的增大,拐彎處的流體回流運(yùn)動(dòng)更加激烈,主流與內(nèi)壁面的流速分離嚴(yán)重,流動(dòng)不均勻形成漩渦更加明顯,能量損失大。3)對(duì)充液閥和集成塊結(jié)構(gòu)優(yōu)化后的流場(chǎng)進(jìn)行分析。(1)充液閥結(jié)構(gòu)優(yōu)化后,明顯消除了從圓孔下來的流體在閥中間位置產(chǎn)生的漩渦區(qū),減小了能量損失。對(duì)比分析了充液油箱上腔加入氣體和沒有加入氣體這兩種情況對(duì)磚壓機(jī)運(yùn)行快速性和穩(wěn)定性的影響。(2)增大集成塊上的插裝閥開度,及減小插裝閥進(jìn)油口與集成塊孔道交叉處的距離,有利于減小集成塊的壓力損失從而有效降低磚壓機(jī)能耗。
[Abstract]:The two-way cartridge valve, the filling valve and the integrated block are three important basic components in the hydraulic system of ceramic tile press. The movement characteristics of two-way cartridge valve core in the process of movement, the flow capacity of the filling valve and the energy loss of the inner hole of the integrated block directly affect the energy consumption, rapidity and stability of the ceramic tile press. Based on the upgrading of national industrial structure to improve the core competitiveness of enterprises, enterprises need to produce more energy-saving, more efficient, more stable ceramic tile press, so it is of great significance to study the upper cartridge valve, liquid filling valve and integrated block of the press. In this paper, the hydraulic system of YP3500 ceramic tile press of Foshan Henglitai Machinery Co., Ltd is taken as the research object, and the flow field of two-way cartridge valve, liquid-filled valve and mandrel hole is analyzed. The mathematical model of the steady hydraulic power of the cartridge valve is established, and the research method of the filling valve based on the multi-phase flow ceramic tile press is analyzed. The flow area of cartridge valve, the steady state hydraulic power and flux, and the density and flux of the mixed phase of the valve are calculated theoretically. The influence factors of steady hydraulic power and multiphase flow of cartridge valve are analyzed, which provides theoretical basis for verification of simulation model. (2) Three-dimensional geometric model of cartridge valve, liquid-filled valve and manifold flow channel is established, and Gambit is used to mesh the valve. The parameter setting and solution simulation of the fluid model are carried out in Fluent. The simulation results show that under the same pressure difference, the pressure field and velocity vector field become more complex at the flow surface between the valve core and the valve sleeve, the velocity separation is serious, and the flow is more uneven with the increase of the opening of the cartridge valve. The swirl formed at the cavities of the process becomes larger. The simulation results show that the larger the volume ratio of gas under the same pressure difference, the greater the flow rate of the hydraulic oil passing through the filling valve, the faster the downlink speed of the moving beam, but the worse the stability of the brick press. Changing the pressure difference and the volume rate of gas has little effect on the pressure field, velocity field and gas phase distribution trend of the filling valve, and the fluid coming from the round hole at the inlet of the filling valve produces whirlpool in the middle of the valve, and the energy loss is relatively large. Therefore, it is necessary to eliminate the vortex region in the following structural optimization process. (3) the flow field distribution at the corner of the integrated block is analyzed. It is found that with the increase of the pressure difference, the flow back motion at the corner becomes more intense. The separation of the flow velocity between the main stream and the inner wall is serious, and the vortex formed by the non-uniform flow is more obvious. The energy loss is large. 3) the flow field after the optimization of the filling valve and the integrated block structure is analyzed. 1) after the structure optimization of the filling valve, the structure of the valve is optimized. The vortex region produced by the fluid coming from the circular hole in the middle of the valve is eliminated obviously, and the energy loss is reduced. The effect of adding gas on the upper chamber of the tank and not adding the gas to the running speed and stability of the brick press is compared and analyzed, which increases the opening degree of the cartridge valve on the integrated block. Reducing the distance between the inlet of the cartridge valve and the hole of the block is helpful to reduce the pressure loss of the block and reduce the energy consumption of the brick press effectively.
【學(xué)位授予單位】：廣東工業(yè)大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：TQ174.621

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本文編號(hào)：1977142