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当前位置:首页 > 维护技术 > 山东卷扬式启闭机的厂家设计参数
山东卷扬式启闭机的厂家设计参数
12-25 10:22
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     卷扬式启闭机是用钢索或钢索滑轮组作吊具与闸门相衔接,经过齿轮传动零碎使卷扬筒绕、放钢索从而带动升降的机械、也叫做钢丝绳固定式卷扬机。它结构较复杂易于制造,维护检修方便,普遍使用于各品种型闸门的启闭。卷扬式启闭机分爲单吊点和双吊点两种。双吊点卷扬式启闭机是经过衔接轴将两个单吊点的启闭机衔接在一同停止同步运转,可做成一边驱动或两边驱动。卷扬式启闭机通常是一扇闸门用一台启闭设备,装置在高出闸门槽顶部的闸墩上。中国已消费并投入运转的卷扬式启闭机容量已到达:启门力6000kN、启闭行程30m,及启门力4000kN、启闭行程120m。

20190803104738_71785引水口工程作爲水利枢纽工程的重要组成局部,是爲处理城市供水和工业用水、农业灌溉的大型引水工程。工程次要包括进水口、引水隧洞和出水分水枢纽。固定卷扬启闭机设置在进水口高程的闸室内,用于启闭进水口事故闸门。该机采用展开式布置,闸门任务方式爲动水闭门,静水启门。
二启闭机次要技术参数:
启门力1200KN
起降低度34m
起升速度1.609rn/min
任务级别Q2
滑轮组倍率4
齿轮总传动比419.05
三启闭机的构造布置与任务原理
该机爲单吊点启闭机,由卷扬安装、传动机构、维护安装、机架等部件组成。经过一台电动机驱动,采用一台三级加速器和一级开放式齿轮加速,驱动卷筒旋转,经过钢丝绳在卷筒上的收放,带动闸门上升或下降。
启闭机上装有闸门开度仪,用来控制闸门的上、下极限地位、事后设定的地位和经过显示仪现场观看闸门的升降地位。爲避免启闭机超负荷运转,在卷筒一端轴承座下装有荷载限制器,当启闭荷载到达额外荷载的110%时,荷载限制器收回信号报警并自动切断主回路电源,制动器抱闸,启闭机中止任务。
四启闭机的操作顺序
1普通阐明
本机采用现场控制,现场监视闸门地位的控制方式。
提升闸门前,首先应用塔体内的充程度压零碎停止充程度压,使门体上、下游的水压力大至相等,经确认平压之后,才干停止提升闸门操作。
2闸门提升操作顺序
按控制柜“起升”按钮,电动机作提升方向旋转,闸门上升,至上极限地位时,高度传感器(或主令控制器)举措并自动切断电源,制动器抱闸,启闭机中止运转。闸门提升后,若临时不必,应将其锁定到检修平台。
3闸门下放操作顺序
封闭闸门之前,应先经过点动,使闸门略微提起,解除对闸门的锁定,然后按控制柜“下降”按钮(闸门锁定已解除),电动机作下降方向旋转,闸门下降,至下极限地位时,高度传感器(或主令控制器)举措,并自动切断电源,制动器抱闸,启闭机中止运转。
五部件的制造
1机架
启闭机机架次要用于装置启闭机各组成部件,并将荷载传递给根底,保证启闭机正常运转,其特点是机加工量大,制造尺寸精度要求高。该机机架外形尺寸设计要求各加工面立体度误差不大于0.5mm,各加工面之间绝对高度误差不大于lmm。普通机床不能满足加工要求,必需有特定铣床来完成加工,整台铣床由床身导轨、铣削动力头和垫块组成。床身导轨的长度大于所加工机架的长度,当两个加工面间的高差超越动力头的调理范围时,可用已在磨床上加工好的垫块来调理高度,整个铣床可以依据需求放置在不同的地位。在铣削前,先将机架放在平台上,划出机架的拦腰线,然后用程度仪、高度尺、米尺辨别测出拦腰线的高度以及待加工面绝对拦腰线的高度差,从而测出待加工面的加工余量,同时还综合思索其他各加工面的加工余量。停止铣削时,动力头与铣刀盘的中心线垂直于待加工面,详细工艺可分爲粗铣和精铣两道工序,粗铣后留1~2mm的加工余量,这样加工出来的机架无论是各加工面间的绝对高度还是光亮度都有较好的保证。采用此方法加工所需求的工夫比其它办法加工所需求的工夫短,效果非常理想。
2卷筒
卷筒外形尺寸依据需求设定,简体壁厚依据外型尺寸而定,粗糙度Ra3.2,采用铸钢ZG270—500,分段铸造后焊接成一体。卷筒焊接成形后,对接焊缝应停止无损探伤检验,并停止低温退炽热处置,消弭应力,波动组织,爲保证筒体加工精度做好预备。
加工时次要保证:①卷筒壁厚平均,各处筒壁厚度差不超越8mm;②卷筒外圆与内轴孔同轴度不超越0.3mm;③卷筒与大齿轮衔接的凸外缘与卷筒内孔的同轴度不超越0.3mm,垂直度不超越0.6mm。
爲了保证卷筒壁后平均,在加工前应留意检测其壁厚值能否超差,若偏向较大,可采用借中心的办法予以调整。
爲了保证卷筒内外圆的的同轴度,应在卷筒外圆加工终了后,以外圆爲基准镗出卷筒内孔。www.juanyangshiqibiji.com
爲了保证开式齿轮的啮合间隙,应特别留意卷筒凸外缘与大齿轮止口的公称尺寸,二者之间的公差不宜过大,防止啮合间隙一侧过大而另一侧过小,同时留意卷筒凸外缘端面与卷筒外圆的垂直度。这样才干保证大齿轮的外径与卷筒轴同心,从而在拆卸中保证开式齿轮副啮合间隙的分歧性。The hoisting hoist is a kind of machine that uses steel rope or cable pulley group as lifting gear to connect with the gate. Through gear transmission, the hoist drum can be winded and released to drive the hoisting. It is also called wire rope fixed hoist. It has complex structure, easy manufacture, convenient maintenance and repair, and is widely used in the opening and closing of various types of gates. The hoisting hoist can be divided into single hoisting point and double hoisting point. Double hoisting hoist is a hoist with two single hoisting points connected by a connecting shaft to stop synchronous operation, which can be made into one-side drive or two-side drive. The hoisting hoist is usually a gate with a hoisting device, which is installed on the pier above the top of the gate groove. The capacity of hoisting hoist which has been consumed and put into operation in China has reached 6000 kN, 30m, 4000 kN and 120m. As an important part of water control project, water diversion project is a large-scale water diversion project to deal with urban water supply, industrial water and agricultural irrigation. Secondary projects include intakes, diversion tunnels and outlet water hubs. The fixed hoisting hoist is installed in the gate chamber at the elevation of the intake for hoisting the accident gate at the intake. The machine is deployed, and the gate task mode is dynamic water closing and static water opening. Secondary technical parameters of hoist: hoisting force 1200KN, hoisting speed 34m, hoisting speed 1.609rn/min task-level Q2 pulley group multiplier 4 gear total transmission ratio 419.05 three hoist structure layout and task principle. The hoist consists of hoisting installation, transmission mechanism, maintenance installation, frame and other components. After a motor drive, using a three-stage accelerator and a first-stage open gear to accelerate, drive the drum to rotate, through the wire rope on the drum, drive the gate to rise or fall. The hoist is equipped with gate opener, which is used to control the upper and lower limit position of the gate, the post-setting position and the rising and falling position of the gate through the display device. In order to avoid overload operation of the hoist, load limiter is installed under the bearing seat at one end of the drum. When the hoist load reaches 110% of the additional load, the load limiter retrieves the signal to alarm and automatically cuts off the main circuit power supply. The brake holds the brake and the hoist stops working. The operation sequence of the four hoists 1 generally states that the machine adopts the control mode of on-site control and on-site monitoring of the position of the gate. Before lifting the gate, first of all, the filling degree of piecemeal pressure in the tower body is applied to stop filling degree pressure, so that the water pressure in the upper and lower reaches of the gate body is equal. After confirming the level pressure, the lifting gate operation can be stopped. 2. The operation sequence of gate hoisting is according to the "hoisting" button of the control cabinet. The motor rotates in the hoisting direction. When the gate rises to the upper limit position, the height sensor (or the master controller) moves and automatically cuts off the power supply. The brake holds the brake and the hoist stops running. After lifting the gate, if it is not necessary temporarily, it should be locked into the overhaul platform. 3. Before closing the gate in descending order, the gate should be lifted slightly, unlocked, and then the "drop" button of the control cabinet (lock of the gate has been released) is pressed. The motor rotates in descending direction and the gate falls down. When the gate reaches the lower limit, the height sensor (or master controller) measures, and automatically cuts off the power supply, the brake holds the brake and the hoist and shut-off machine. Stop operation. Five-part manufacturing 1-frame hoist sorties are used to install the components of hoist and transfer the load to the root to ensure the normal operation of hoist. Its characteristics are large machining capacity and high manufacturing dimensional accuracy. The dimension design of the frame requires that the dimensional error of each processing surface be no more than 0.5mm and the absolute height error between the processing surfaces be no more than lmm. Ordinary machine tools can not meet the processing requirements, there must be a specific milling machine to complete the processing, the whole milling machine is composed of bed guide, milling power head and cushion block. The length of the bed guide is longer than the length of the machined frame. When the height difference between the two machined surfaces exceeds the adjustment range of the power head, the height can be adjusted by the cushion blocks already machined on the grinder. The whole milling machine can be placed in different positions according to the requirements. Before milling, the rack is placed on the platform and the waist line of the rack is drawn. Then the height of the waist line and the height difference of the absolute waist line of the surface to be processed are identified by the degree meter, height ruler and meter ruler, so as to measure the processing allowance of the surface to be processed, and at the same time, the processing allowance of other processing surfaces is considered comprehensively. When stopping milling, the center line of power head and milling cutter head is perpendicular to the surface to be processed. Detailed technology can be divided into two processes: rough milling and finish milling. After rough milling, the machining allowance of 1-2 mm is reserved. Thus, the machined rack can be guaranteed better whether the absolute height or brightness of each processing surface. The processing time required by this method is shorter than that required by other methods, and the effect is very ideal. The outer dimensions of drum drum are set according to the requirement, the wall thickness of cylinder is determined according to the outer dimensions. The roughness Ra3.2 is made of cast steel ZG270-500, which is welded into a whole after casting in stages. After the drum is welded and formed, the butt weld shall stop non-destructive testing, and stop the treatment of low temperature decay heat, eliminate stress and wave structure, so as to prepare for ensuring the processing accuracy of the drum. Processing time should ensure that: (1) the average thickness of the drum wall, the thickness difference of the drum wall does not exceed 8 mm everywhere; (2) the coaxiality of the outer cylinder and the inner hole of the drum does not exceed 0.3 mm; (3) the coaxiality of the convex outer edge of the drum and the inner hole of the drum does not exceed 0.3 mm, and the perpendicularity does not exceed 0.6 mm. In order to ensure the average behind the drum wall, attention should be paid to inspection before processing.

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