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多级泵的机械密封

date.png 2020-03-21 11:03:32

多级泵机械密封处渗漏水的一种可能性是机封的动、静环平面磨损。而形成机封的动、静环平面磨损的缘由有5个方面:



1、多级泵装置过紧。察看机械密封的动静环平面,如有严重烧焦现象,平面发黑和很深的痕迹,密封橡胶变硬,失去弹性,这种现象是由于装置过紧形成的。处置方法:调整装置高度,叶轮装置后,用螺丝刀拔动弹簧,弹簧有较强的张力,松开后即复位,有2-4MM的挪动间隔即可。



2、多级泵装置过松。察看机封动、静环平面,其外表有一层很薄的水垢,可以擦去,外表根本无磨损,这是弹簧失去弹性及装配不良形成,或电机轴向窜动形成。



3、水质差含颗粒。由于水质差,含有小颗粒及介质中盐酸盐含量高,构成磨料磨损机封的平面或拉伤外表产生沟槽、环沟等现象。处置方法:改良水压或介质,改换机封。



4、多级泵缺水运转形成干磨损坏。此现象多见于底阀式装置方式进口处负压,进水管有空气,泵腔内有空气,自均衡多级泵开机后,机封的磨擦高速运转时产生高温,无法得到冷却,检查机封,弹簧张力正常,摩擦面烧焦发黑,橡胶变硬开裂。处置方法:排虽然道及泵腔内空气,改换机械密封。



5、多级泵气蚀。气蚀主要产生于热自均衡多级泵。由于介质是热水,水温过高产生蒸汽,管道内的汽体进入泵腔内高处,这部份的汽体无法扫除,从而形成缺水运转,机封干磨失效,气蚀装自动排气阀,改换机封。

The first possibility of water leakage at mechanical seal is the plane wear of dynamic and static rings of mechanical seal. There are six reasons for the formation of the plane wear of the dynamic and static rings of the mechanical seal:


1. The device is too tight. Check the dynamic and static ring plane of the mechanical seal. If there is serious burning phenomenon, black and deep traces on the plane, the sealing rubber becomes hard and loses elasticity. This phenomenon is caused by the over tightening of the device. Handling method: adjust the height of the device. After the impeller device is adjusted, use a screwdriver to pull the spring. The spring has strong tension. When it is released, it will be reset. There is a moving interval of 2-4mm.


2. The device is too loose. Check the dynamic and static ring surfaces of the machine seal. There is a very thin layer of scale on the surface, which can be wiped off. There is no wear on the surface. This is caused by the loss of spring elasticity and poor assembly, or the axial movement of the motor.


3. The water quality is poor with particles. Due to the poor water quality, small particles and high content of hydrochloride in the medium, there are grooves and ring grooves on the plane or surface of the abrasive wear machine seal. Disposal method: improve water pressure or medium, change machine seal.


4. Dry grinding damage caused by water shortage operation. This phenomenon is often seen in the negative pressure at the inlet of the bottom valve type device, the air in the water inlet pipe and the air in the pump cavity. After the self equalizing multi-stage pump is started, the friction of the machine seal will generate high temperature during high-speed operation, which can not be cooled. Check the machine seal, the spring tension is normal, the friction surface is scorched and blackened, and the rubber is hard and cracked. Disposal method: exhaust the air in the passage and pump cavity, and replace the mechanical seal.


5. Cavitation. Cavitation mainly occurs in the heat self balancing multistage pump. Because the medium is hot water and the water temperature is too high to generate steam, the steam body in the pipeline enters the pump cavity, which cannot be removed, resulting in water shortage operation, failure of machine seal dry grinding, cavitation installation of automatic exhaust valve, and replacement of machine seal.


联系方式

ico04
联系人

徐经理

ico01
电话

0312-3426976

ico06
手机

13932271419

ico05
QQ

632469545

ico03
邮箱

632469545@qq.com

ico02
地址

河北安国市石佛镇路景工业园区景旺路8号

 
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