A pipeline sewage pump to ensure the quality of parts
Pipeline sewage pump mechanical seal sealing performance test should be done in the factory, and has the certificate. Mechanical seal by running for a long time, the moving ring and static ring wear reactor sealed with mechanical, spring and shaft sealing ring wear, corrosion and wear, aging, deformation, can cause the seal leakage, it is necessary to repair the slurry pump mechanical seal repair or replace parts.The moving ring and the static ring sealing surface shall not have cracks, off angle, scratches, pits, flashand partial grinding, the sealing surface scratches, pits can run through. If the use of dynamic loopcorrection, dynamic ring lug height and not less than 3mm, and the single lug height of not less than LMM, so as not to affect the heat. The dynamic ring device should ensure that the non-standardmechanical seal can be shaft sensitive mobile, moving ring pressure to the spring should be free to recoil, keep straight and parallel dynamic ring. Dynamic sealing ring apron specifications fit drawingrule, the appearance may have broken, uneven thickness and soft and hard uneven representation,replace the sealing ring in the overhaul. The external appearance of spring cleaning rust, before useshould be length form view and pressure experiment, each spring should be to meet the demand in the rule tightening length pressure, each spring in the pressure error rule tightening length to meet the demand. Free length tolerance does not exceed 0.5mm, tightening the amount can not be too big too small, demand error + 2mm. The sealing sleeve and the pump shaft can not use the same kind of raw material, parallelism allows both sides end difference and axis straightness tolerance is not less than 0.20mm.
Two, pipeline sewage pump to ensure sufficient cooling lubrication
Adjust the cooling pipeline valve opening, to ensure that the mechanical seal cooling pipeline patency,open tank pump emptying valve to drain the gas seal cavity.
Three, to ensure the accuracy of pipeline sewage pump device
Disassembly pump mechanical seal, dynamic ring to clean, and apply lubricating oil cleaning in theminority side conflict, should take the high-pressure and low-pressure end, it is strictly prohibited tobump. The stationary ring gland device when the force should be uniform, to avoid the partial press,with a feeler to see, up and down around the location of the error is not more than 0.05mm;cooperation void view gland and the shaft outer diameter, around to evenly, each point promised error is not more than 0.1ram. Installation of water pump mechanical seal parts of the pump shaft radial runout does not exceed 0.05mm. Before the pump cover and a sealing end cover and positioning device, to seriously review the mechanical seal of the scale, if the location scale does not conform torequirements, can be in the shaft sleeve steel pad adjustment, but the steel pad precision thickness difference not to exceed 0.01mm. The measurement of mechanical radial sealing sleeve beat and beatfit the demand end face seal.
The seal on the operating machinery, all gland loose so that the sealing surface moving condition,dynamic ring parts necessary to replace, certainly not the head tightening continued use. Because in such loose after the movement track will be conflict copy changes, touch the surface of the sealing performance is easy damaged.
Four, pipeline sewage pump to adjust the surface pressure ratio
Face pressure is related to the sealing performance and using life of the important parameters, it with the structural types and sealing spring size associated with medium pressure. Face pressure will add badconflict vice; easy leakage pressure is too small, usually by the manufacturers are given a suitable scaleface pressure usually ranges from 3 to 6kg / cm2. Adjust the pressure ratio is to adjust the springcompression standard. Spring free length A show, spring stiffness load accept unit tightening when the quantity of K, rules demand pressure than the P show, these are the parameters given by themanufacturers. After contraction scale B show, P / A-13=k, 13=A-e / K is obtained, which is the springdevice after the tightening of scale. If the spring device after the scale is too large, can increase theadjustment pad thickness between the spring seat and a spring, the scale is too small to cut theadjustment on the thickness, adjusting pad thickness measured with micrometer.