Maintenance
Author:
Release time:
2021-11-09
In order to ensure the reliability and life of the electric hoist, the hoist must be regularly lubricated and maintained:
1, the new installation, after overhaul, idle time for more than one year to reuse the electric hoist, before use should be based on the relevant installation test for commissioning inspection;
2. Daily inspection, monthly inspection and annual inspection shall be carried out during use;
3, should pay attention to the use of wire rope, maintenance, and scrap;
4, for each inspection to have a written detailed registration record and take measures.
5. During maintenance, the replacement parts should be the same as the original materials and performance;
6. When the structural parts are welded, the operation and the materials used shall conform to the quality standards of the original structural parts;
7. When the electric hoist is in working condition, maintenance is not allowed;
8. Refer to relevant regulations and requirements for the above inspection items.
Daily inspection items and requirements of electric hoist
Inspection Items | Requirements |
Location | No obstacles within the operator's walking range |
Running track | There should be no anomalies on the track observed from the ground. |
Button device (flashlight) | The lifting, lowering and left and right running actions are sensitive and accurate; the electric hoist shall not operate when a group of buttons are pressed at the same time. |
limiter | When the no-load hook rises to the limit position, the limit shall be accurate and reliable. |
Hook device | The hook shall rotate flexibly within the range of 360 ° and 180 ° of the circumference. The pulley shall be free of blocking and rubbing during rotation. The hook nut anti-loosening device shall be normal, and the lifting opening locking device shall be normal. |
wire rope | Daily observation shall be carried out according to Article 3.4.1.1 in GB5972 |
Brake | Braking for lifting, lowering and running shall be sensitive and reliable. |
Rope guides and other safety devices | The operation is normal, safe and reliable, the connection part shall not be loose, and there shall be no abnormal sound. |
Monthly inspection items of electric hoist and their requirements and grades
Inspection Items | Requirements | Grade | |
Running track (I-beam) | Obstacles within the operating range | The minimum distance between buildings and other equipment within the operating range shall not be less than 100mm. | I |
Track end stop and connecting bolt or weld | The rail end stop shall not have deformation, damage and other defects, its connecting bolts shall not be loose, and the welding seam shall be free of cracks. | I | |
Continuous bolts for fixed rail | Bolts must not be loose | III | |
Rail joint weld | Welds shall be free of defects such as cracks. | III | |
Track wear | There shall be no local abnormal deformation and wear at the contact between the track and the wheel tread and the wheel flange. | III | |
Hoisting device | Pulley | There shall be no abnormal damage to the sheave groove and no damage to the rim integrity. | I |
Appearance | The pulley cover shall not be damaged, the retaining ring and pin of the shaft retaining plate shall not be loose, and the hook opening locking device shall operate normally. | I | |
Working status | Pulley slewing should be smooth and flexible | III | |
Balance roller skating | Appearance | The pulley shall not be damaged, and the assembly and connection shall be firm. | III |
Wall Panel | Connecting bolts must not be loose | III | |
Wheels | The tread and rim shall be free of abnormal wear and scars. | III | |
wire rope | Rope end fixing condition | Each end of the wire rope shall be firm and reliable, and there shall be no abnormality. | I |
Appearance | There shall be no kink, burn, obvious looseness, corrosion and other defects, and lubricating oil shall be provided on the rope. | I | |
Safety level of use (end-of-life criteria) | According to the provisions of 3.5.1~3.5.11 in GB5972 | I | |
Gear | Gear lubrication condition | The surface of the open gear should be greased regularly, and the closed gear should be greased regularly. | II |
Cable | Appearance | The cable shall not have defects such as trauma, abnormal bending or torsion, aging, etc. | II |
Assembly condition | The connection between the cable and the switch shall not be loose, the center line ring shall not be separated and slipped; the two ends of the supporting steel wire shall not be loose. | III | |
Current collector | Working condition | The collector pulley shall be flexible and free of obvious wear. | II |
Appearance | The connecting bolt shall not be loose, the insulator shall not be loose and damaged, and the spring shall not lose its elasticity. | III |
Electric hoist annual inspection items and their requirements and grades
Inspection Items | Requirements | ||
Running track (I-beam) | Tread cleanliness | There shall be no attached oil and a large amount of dust. | |
Inclination | Not more than 1/1000 | ||
Connector | There shall be no cracks in the weld and track, and the offset between the upper and lower sides shall not be greater than 1mm. | ||
Wear condition | The tread wear amount is not more than 10% of the original size, and the width wear amount is not more than 5% of the original size. | ||
Wheels | rim | The wear of the rim thickness shall not exceed 50% of the original thickness, and the total lateral clearance between the rim and the track shall be less than 50% of the wheel tread width. | |
Tread | The amount of wear measured according to the tread diameter should be less than 5% of the original size, the tread diameter difference should be less than 1% of the nominal diameter, and the roundness difference should be less than 0.8mm. | ||
Appearance | There shall be no crack or damage | ||
Brake | Repeat inspection as required by monthly inspection | ||
wire rope | Repeat inspection as required by monthly inspection | ||
Gear | Wear of gear of lifting mechanism | The allowable wear of the first-stage gear should be less than 10% of the original thickness; other gears should be less than 20% | |
Wear of running gear | The allowable wear of the first-stage gear should be less than 15% of the original thickness; other gears should be less than 25%, and open gears should be less than 30% | ||
Tooth surface defect inspection | The teeth shall not have cracks or broken teeth; The pitting damage of the tooth surface shall not exceed 30% of the tooth joint surface, and the depth shall not exceed 10% of the original thickness. | ||
Hook | Appearance | There shall be no cracks on the surface, no plastic deformation on the threaded part, dangerous section and neck, and no repair welding for defects. | |
Wear of dangerous section | Do not exceed 15% of the original size D | ||
Openness | Do not exceed 10% of the original size D | ||
torsional deformation | Not more than 10 degrees | ||
Pulley | The uneven wear of the wheel groove is less than 3mm, the wall thickness loss of the wheel groove is less than 20% of the original wall thickness, and the bottom wear of the wheel groove is less than 25% of the diameter of the wire rope; There shall be no defects that damage the wire rope. | ||
Shaft | Wear of gear shaft | The wear amount shall not exceed 1% of the original journal | |
Wear of other shafts | The amount of wear shall not exceed 2% of the original journal. | ||
Reel | There shall be no cracks, and the wear of the cylinder wall shall be less than 10% of the original wall thickness. | ||
Key | The connection between the key and the keyway shall be free of looseness, deformation and abnormal wear. | ||
Spline | There shall be no abnormal wear and deformation | ||
rolling bearing | No damage and crack | ||
Oil seal | The mating surface shall be free of cracks. | ||
Cable | Repeat inspection as required by monthly inspection | ||
Current collector, switch | Repeat inspection as required by monthly inspection | ||
Insulation resistance of circuit to ground | Not less than 1.5MΩ | ||
Resistance of charged body and contact screw | Not greater than 0.1Ω |