Meltblown Fabric Production Line
Dengzhou Longyi Machinery Co., Ltd. is a non-woven production line design, production, manufacturing, processing, installation, transformation as one of the enterprises. Based on advanced technology and processing equipment, we undertake S, SS, SSS, SMS, SMMS, PP / PE two-component, PET polyester non-woven fabric production line and other engineering projects, and provide turnkey engineering services.
In order to ensure the quality of products, the company strictly implements the international quality management system, carries out strict inspection from the raw materials into the factory to the products out of the factory, strictly controls the quality, does not let a unqualified product out of the company, let the user 100% satisfaction is our commitment to customers.
Meltblown Fabric Machine,Melt Blown Cloth Machine,Melt Blown Fabric Production Line,Pp Melt Blown Non Woven Fabric Making Machine Dengzhou Longyi Machinery Co., Ltd , https://www.nylongyi.com
2. Close the pump inlet and outlet valves, open the bearing oil tank oil drain bolt put the oil will be the main circuit breaker of the motor opened, hang good "no closing" logo to the waste oil recovery drum;
3. Remove the motor cables and anchor bolts and remove the motor .
4. Let go of the pump memory water, remove the pressure gauge, closed with a plug empty mouth, so as not to enter debris;
5. Remove the pump support anchor bolts and pump casing bolts;
6. Remove the pump body assembly from the pump housing and use a special wrench to unscrew the shaft nut securing the impeller;
7. Remove the double-headed bolt nut on the connecting frame, release the packing gland, pull the impeller with a puller, remove the flat key;
8. Use Rama to pull out the coupling, remove the flat key, remove the cover on both sides of the bearing box, use the rear end to remove the shaft;
9. With a copper rod from the front (near the motor side) of the shaft, bearing from the bearing box shot;
10. pull the bearing pull out;
11. Replacement of spare parts, repair after installation by the opposite procedure;
12. Pump installed in place, the coupling adjustment leveling;
13. Maintenance is completed, the site health clean, tools inventory.
Test drive:
1, open the inlet valve, hand crank, flexible no stuck phenomenon;
2, the "no closure" sign removed, close the main circuit breaker;
3, Jogging test drive, motor rotation is normal, no abnormal sound;
4, start the motor, open the outlet valve;
5, the motor rotates normally, no abnormal sound, no radial transmission, vibration phenomenon, pipeline pressure increased to normal pressure;
6, running time does not exceed 1 minute, stop the pump running, test the end.
Fourth, the maintenance standards (1) maintenance of centrifugal pump bearings when the standard
1. Ovality and shaft taper can not be greater than one-thousandth of the shaft diameter.
2. Shaft surface roughness Ra <1.6um.
3. Shaft diameter and contact area of ​​the bearing should not be less than 60 ° ~ 90 ° range, its surface should not have traces of corrosion.
4. Shell and bearing should be in close contact.
5. Bearing can not have cracks, trachoma, metal cutting and so on.
6. The bearing cap and bearing between the force of not less than 0.02 ~ 0.04mm.
7. The outer diameter of the ball bearing can not be in contact with the inner wall of the bearing housing.
8. Radial load bearing outer ring bearing housing contact with the inner wall with H7 / h6.
(2) Standard for overhauling centrifugal pump packing gland
1. Gland end face must be vertical.
2. Packing gland and sleeve diameter clearance 0.75 ~ 1.0mm.
3. Packing gland outer diameter and filling box gap 0.1 ~ 0.15mm.
4. Mechanical seal gland pads to be higher than the contact surface of 1.50 ~ 2.50mm.
(3) technical standards for overhaul centrifugal oil seal ring
1. Seal ring and sleeve clearance 1.00 ~ 1.50mm.
2. Seal ring outer diameter and end face vertical.
3. Packing box and seal ring outer diameter clearance of 0.15 ~ 0.2mm.
(4) Standard for overhauling centrifugal pump couplings
1. Coupling plane clearance: cold oil pump 2.2 ~ 4.2mm, hot oil pump is greater than the previous series of 1.55 ~ 2.05mm.
2. Rubber band coupling diameter than perforated 0.15 ~ 0.35mm.
3. Disassemble the coupling with special tools, keep it clean and avoid bumps.
(5) standard centrifugal pump impeller
1. Impeller surface without scale, sludge, cracks and so on.
2. The thickness of the impeller than the keyway 0.15 ~ 0.35mm.
3. Key and keyway to be in close contact, no more pad.
4. New impeller needs to find the balance and static balance.
5. Impeller and shaft with H7 / h6.
Fifth, security measures:
Participate in the maintenance of all aspects of personnel, we must wear good labor protection products, to comply with technical procedures;
Tools, materials, accessories placed neatly arranged;
When using Rama must pay attention to even force;
Timely clean up the ground oil, debris, pay attention to non-slip.
Circulation pump repair process
1. After the main circuit breaker of the motor is opened, the registration sign "Prohibit closing" shall be marked;