■D、DG型卧式多级泵产品概述：D、DG型卧式多级泵系列单吸多级分段式卧式离心泵，是在老产品的DA型泵基础上大胆改进机构并采用先进的水力模型设计而成的高效节能更新换代产品，全部取代老DA型泵，根据输入介质、温度派生出DG、MD、DF系列泵。■D、DG型卧式多级泵技术参数：流量：6.3-300m3/h；扬程：13-650m；功率：2.2-400KW；转速：1450-2950r/min；口径：φ50-φ200；温度范围：≤105℃；工作压力：≤3.0Mpa.■D、DG型卧式多级泵型号意义：■D、DG型卧式多级泵产品特点：1、水力模型先进，效率高，性能范围广。2、泵运行平稳，噪音低。3、轴封采用软填料密封或机械密封，密封安全可靠、结构简单，维修方便快捷。4、轴为全封结构，确保了不与介质接触，不锈蚀，使用寿命长。■D、DG型卧式多级泵结构特点：D、DG型泵进、出水口均为垂直向上，通过拉紧螺栓将泵的进水段、中段、出水段、轴承体等泵壳体部分联结成一体。根据泵的扬程选择泵的级数。该系列泵转子部分主要由轴及安装在轴上的叶轮、轴套、平衡盘等零件组成，其中叶轮的数量根据泵的级数而定。轴上零件用平键和轴螺母紧固使之与轴联为一体。整个转子由两端滚动轴承或滑动轴承支承。轴承按型号不同而定，均不承受轴向力，其轴向力由平衡盘平衡。泵在运行中允许转子在泵壳中轴向游动，不能采用向心球轴承。滚动轴承用油脂润滑，滑动轴承用稀油润滑，并用油环进行白润滑，循环水冷却。泵的进水段、中段、出水段之间的密封面均采用二硫化钼润滑脂密封，转子部分与固定部分之间装有密封环、导叶套等进行密封，当密封环和导叶套的磨损程度已影响泵的工作性能时应予更换。的密封形式有机械密封和填料密封两种。泵采用填料密封时，填料环的位置安放要正确，填料的松紧程度必须适当，以液体能一滴一滴渗出为宜。泵各种密封元件装在密封箱内，箱内要通入一定压力的水，起水封、水冷或水润滑作用。在轴封处装有可更换的轴套，保护泵轴。次高压泵一般采用滑动轴承、稀油润滑结构，DG85-67、DG155-67型泵可采用滑动轴承、稀油润滑，也可采用滚动轴承、干油润滑结构，其余型号均采用滚动轴承、干油润滑结构。中、低压泵的主要零件材料一般采用优质铸铁，次高压泵主要零件采用铸钢或不锈钢。该系列泵通过弹性联轴器由原动机直接驱动，从原动机方向看，泵为顺时针方向旋转。■D、DG型卧式多级泵结构图：DG泵（中低压）结构图.填料密封-水封水引自第一级叶轮1轴承体6导叶11尾盖2进水段7密封环12填料密封部件3平衡水管8中段13水冷填料压盖4导叶套9出水段14O型密封圈5叶轮10平衡盘15轴承部件DG泵（中低压）结构图.填料密封-水封水用外接水DG泵（中低压）结构图.填料密封-机械密封1轴承体6导叶11尾盖2进水段7密封环12机械密封部件3平衡水管8中段13水冷机械压盖4导叶套9出水段14O型密封圈5叶轮10平衡盘15轴承部件DG泵（次高压）结构图■D、DG型卧式多级泵适用范围：D、DG型泵系单吸多级分段式离心泵，供输送清水及物理化学性质类似于清水的液体之用。泵扬程H19至245.7米，流量为18至162m3/h，液体的最高温度不得80℃，适用于工业和城市给排水、高层建筑增压供水，园林喷灌、消防增压、远距离送水、采暖、浴室等冷暖水循环增压及设备配套等，尤其适用于小型锅炉给水。■D、DG型卧式多级泵性能参数：泵型号转速（r/min）流量扬程（m）效率(%)功率（KW）必需汽蚀余量（m）m3/hL/S轴功率电机功率DDG6-25×329503.751.0476.5332.375.52.06.31.7575452.862.07.52.0873.5473.192.5DDG6-25×429503.751.04102333.167.52.06.31.75100453.812.07.52.0898474.262.5DDG6-25×529503.751.04127.5333.957.52.06.31.75125454.772.07.52.08122.5475.322.5DDG6-25×629503.751.04153334.73112.06.31.75150455.722.07.52.08147476.392.5DDG6-25×729503.751.04178.5335.52112.06.31.75175456.672.07.52.08171.5477.452.5DDG6-25×829503.751.04204336.31152.06.31.75200457.632.07.52.08196478.582.5DDG6-25×929503.751.04229.5337.10152.06.31.75225458.522.07.52.08220.54790582.5DDG6-25×1029503.751.04255337.8918.52.06.31.75250459.532.07.52.082454710.632.5DDG6-25×1129503.751.04280.5338.6818.52.06.31.752754510.52.07.52.08269.54711.712.5DDG6-25×1229503.751.04306339.4718.52.06.31.753004511.442.07.52.082944712.782.5DDG12-25×329507.52.0884.6443.937.52.012.53.4775544.732.015.04.1769535.372.5DDG12-25×429507.52.08112.8445.24112.012.53.47100546.302.015.04.1792537.092.5DDG12-25×529507.52.08141446.55112.012.53.47125547.882.015.04.17115538.862.5DDG12-25×629507.52.08169.2447.85152.012.53.47150549.462.015.04.171385310.642.5DDG12-25×729507.52.08197.4449.16152.012.53.471755411.02.015.04.171615312.412.5DDG12-25×829507.52.08225.64410.4718.52.012.53.472005412.512.015.04.171845314.182.5DDG12-25×929507.52.08253.84411.7818.52.012.53.472255414.182.015.04.172075315.952.5DDG12-25×1029507.52.082824413.09222.012.53.472505415.762.015.04.172305317.732.5DDG12-25×1129507.52.08310.24414.4222.012.53.472755417.342.015.04.172535319.52.5DDG12-25×1229507.52.08338.44415.7302.012.53.473005418.92.015.04.172765327.32.5DDG25-30×32950154.17102508.33152.2256.9490629.882.2308.3382.66310.72.6DDG25-30×42950154.171365011.1118.52.2256.941206213.12.2308.331106314.262.6DDG25-30×52950154.171705013.89222.2256.941506216.472.2308.33137.56317.832.6DDG25-30×62950154.172045016.67302.2256.941806219.772.2308.331656321.42.6DDG25-30×72950154.172385019.44302.2256.942106223.12.2308.33192.56324.902.6DDG25-30×82950154.172725022.22372.2256.942406226.42.2308.332206328.532.6DDG25-30×92950154.173065025.0372.2256.942706229.652.2308.33247.56332.12.6DDG25-30×102950154.173405027.8452.2256.943006232.92.2308.332756335.72.6DDG46-30×32950308.331026413.02222.44612.5907016.113.05515.3816817.844.6DDG46-30×42950308.331366417.36302.44612.81207021.483.05515.31086823.794.6DDG46-30×52950308.331706421.7372.44612.81507026.853.055