本文選題：CST + 粘性離合器�。� 參考：《太原理工大學(xué)》2011年碩士論文

【摘要】：大型帶式輸送機(jī)在啟動過程中需要進(jìn)行調(diào)速控制,本文所研究的可控啟動傳輸系統(tǒng)是基于牛頓內(nèi)摩擦定理,利用粘性剪切力來傳遞動力,具有傳遞效率高、易于控制、過載保護(hù)等功能。但是目前在我國,這項(xiàng)技術(shù)僅在水泵類負(fù)載以及風(fēng)機(jī)中應(yīng)用比較廣泛,而針對其在帶式輸送機(jī)中的研究還處于相對落后的階段。 本文以道奇公司生產(chǎn)的CST系統(tǒng)為研究對象,通過對其機(jī)械部分、壓力回路以及控制方法的理論分析,結(jié)合軟件仿真和實(shí)驗(yàn),同時對比國內(nèi)產(chǎn)品,提出相應(yīng)的改進(jìn)措施,提高了系統(tǒng)的控制精度和響應(yīng)速度,使得系統(tǒng)能夠很好滿足機(jī)械設(shè)備的可控啟動、調(diào)速等各種工況的控制要求。整個帶式輸送機(jī)壓力控制系統(tǒng)采用電液比例控制系統(tǒng),電液比例閥具有較高的控制精度和穩(wěn)定性,對環(huán)境要求不高,比伺服閥更適應(yīng)于實(shí)際工程；電氣控制部分則主要是采用閉環(huán)PID控制(包括對壓力、速度、加速度和功率的PID控制),其中主要的控制參數(shù)為皮帶速度和電機(jī)功率,保證系統(tǒng)帶速在理想啟動的前提下各個電機(jī)輸出功率平衡；整個控制網(wǎng)絡(luò)是基于PROFIBUS-DP的網(wǎng)絡(luò)配置方式,使用PLC對各模擬量、數(shù)字量進(jìn)行控制,監(jiān)控輸送帶的啟動方式,并在系統(tǒng)過載、過熱或膠帶打滑時發(fā)出警報。 本文重點(diǎn)分析了系統(tǒng)在小流量時的壓力控制方式,針對目前大多數(shù)產(chǎn)品使用比例溢流閥控制不理想的情況,提出了用三通電液比例減壓閥進(jìn)行改善的措施。論文中,首先在SimulationⅩ中對閥進(jìn)行建模仿真比較,然后提出使用PID閉環(huán)控制可以優(yōu)化閥的壓力控制性能,并在此基礎(chǔ)上設(shè)計了三通比例減壓閥的控制實(shí)驗(yàn),模擬輸送機(jī)啟動過程,實(shí)施壓力PID控制,驗(yàn)證了理論和仿真分析的結(jié)果。 本文設(shè)計的帶式輸送機(jī)可控啟動裝置集機(jī)、電、液于一體,控制效果更好,延長了傳送帶的使用壽命、提高了設(shè)備的安全系數(shù)和生產(chǎn)效率。
[Abstract]:Large belt conveyors need speed regulation control in the starting process. The controllable start transmission system studied in this paper is based on Newton's internal friction theorem, which uses viscous shear force to transfer power, which has high transfer efficiency and is easy to control. Overload protection and other functions. However, at present, this technology is only widely used in pump load and fan, but the research on it in belt conveyor is still relatively backward. This paper takes the CST system produced by Dodge Company as the research object, through the theoretical analysis of the mechanical part, pressure loop and control method, combined with the software simulation and experiment, at the same time, puts forward the corresponding improvement measures to the domestic products. The control precision and response speed of the system are improved so that the system can meet the control requirements of various working conditions such as controllable start and speed regulation of machinery and equipment. The whole pressure control system of belt conveyer adopts electro-hydraulic proportional control system. The electro-hydraulic proportional valve has higher control precision and stability, and has less requirement to environment, so it is more suitable for practical engineering than servo valve. The electrical control part mainly adopts the closed loop pid control (including pid control for pressure, speed, acceleration and power), in which the main control parameters are belt speed and motor power. The whole control network is based on PROFIBUS-DP network configuration mode, using PLC to control the analog quantity and digital quantity, monitor the starting mode of conveyer belt, ensure that the system speed is balanced under the premise of ideal start, and the whole control network is based on PROFIBUS-DP network configuration mode. The alarm is issued when the system is overloaded, overheated or the tape slips. In this paper, the pressure control mode of the system at small flow rate is analyzed. In view of the unsatisfactory control of proportional relief valve used in most products at present, the improvement measures with three-way electro-hydraulic proportional pressure reducing valve are put forward. In this paper, the valve is first modeled and simulated in Simulation 鈪，

本文編號：2036271