NYP high viscosity magnetic rotor pump seal breakdown reason
NYP high viscosity magnetic rotor pump seal breakdown reason , to the following four aspects .
1 . Poor quality parts manufacturing
( 1 ) Quality Seal
Lip geometry unqualified tightening spring is too loose , resulting in leak tightness tests , NYP high viscosity magnetic rotor pump into the host after the breakdown and easily make string seal oil . Replace the seals and test the material , geometry and dimensions.
(2) NYP high viscosity pump rotor magnetic processing , assembly quality
Due to the high viscosity of the magnetic rotor pump NYP machining , assembly quality problems, resulting in the gear shaft rotation center of the front cover only the mouth with different heart , causing partial seal wear . Front cover bearing bore should be checked for locating pin hole symmetry and displacement, the front cover of the coaxial port and ending oil seal oil seal bore holes on the bearing hole ( through hole ) concentricity .

( 3 ) seal ring material and processing quality

Since the seal ring material and processing quality problems, resulting in cracks and scratches sealing ring , causing secondary Mifengbuyan even failure , a lot of pressure oil into the oil seal into place ( here, the low-pressure channel ) too late to return the oil , resulting in seal breakdown and a string of oil. Should test the seal ring material and processing quality.

( 4 ) the transmission spline shaft spline connection with the NYP high viscosity of the magnetic rotor pump external splines . Together and mounted on the loader, if spline shaft spline concentricity tolerance machining , turning different causes heart , causing NYP high viscosity magnetic rotor shaft swing , affecting oil seal , causing the seal string of oil. Should check and control the spline shaft , external splines concentricity .

Installation quality differences 2.NYP magnetic rotor pump with a host of high viscosity requirements

(1) NYP high viscosity magnetic rotor pump is installed below standard with a host of NYP high viscosity magnetic rotor pump is mounted to the rear on the host , which requires the installation of concentricity error is less than 0.05mm.

If the transmission is installed facing the end of the spline shaft spline shaft runout tolerance rotation center , asphalt heat pump will NYP high viscosity pump rotor magnetic radial force at high speed rotation state , resulting in the breakdown and a string of oil seals ; especially sleeve type CBZb pumps, gear bearing by radial pressure will destroy the radial compensation sleeve , the harm is much greater than a fixed gap type CBGNYP magnetic rotor pump high viscosity .

( 2 ) Install the gap between the components fail to meet requirements

◆ at the top of the container is covered with a protective gas layer , usually nitrogen ; Similarly, the uppermost part of a large shipment of raw materials isocyanate storage tank is also covered with a protective gas layer . When unloading liquid , liquid storage container and the top of the top of the tank is connected to completely avoid the intake of air into the isocyanates, avoiding the emission of the surrounding environment .

◆ If not using nitrogen as a protective gas layer , you can use dry air *** degrees , you can completely clear the air desiccant moisture in the air . Pumping isocyanate piping system should be configured with a filter or strainer to filter out the grain , grain body , if any , need to clean up the system without interruption cycle

June 1992 , the first magnetic drive pumps used in pumping isocyanate , running 24 hours every day , to the day when it had not been open , parts or all of the original !

"Compared to the outer magnetic NYP high viscosity gear pump rotor pump to provide favorable conditions for the activities , only a slight change in the flow of fluid within the pump , in addition to having a superior self-priming capability , pump solid, simple design, only two rotation parts and a shaft , modular design , easy maintenance and inspection , the real pull- back design . "

Magnetic drive pump effectively reducing the lifetime cost of life and prolong the relative life cycle. Magnetic drive pump has good reliability and energy-saving performance, represents a development direction of the chemical industry , paint and coal tar , coal tar industry engagement in the future NYP high viscosity magnetic rotor pump.