Harbor Crane Slewing Ring

Luoyang Xinqianglian Slewing Bearing Co., Ltd.  ( Hereinafter referred to as the LYXQL) founded in 2003, is located in the ancient capital of nine dynasties Luoyang in Henan province. LYXQL is a national key high-tech enterprises and become a GEM listing company successfully on July 13,2020 (stock code "300850").

LYXQL is a leader in the manufacturers of large size slewing bearings, based on Luoyang in China, developing and producing slewing bearings and precision bearings for the most varied of application areas. The slewing bearings are widely used as components in  deck cranes.

Deck crane, also known as "marine crane", commonly known as "deck crane". It refers to a kind of ship lifting equipment in which the boom, its hoisting, luffing, rotating mechanism and control room are centrally installed in a tower, and the tower can rotate 360° around its base. There are two types of power sources, electric and hydraulic. Compared with boom-type lifting equipment, it has the advantages of compact structure, flexible and convenient operation, simple preparation before operation and small deck area, but it is more expensive and more complicated to maintain.

The slewing bearing is an important part of the ship deck crane, and its work safety and reliability are very high. The point of the slewing bearing of the port marine crane is low speed and high load. According to the actual use, the customer's use speed for marine products is 6-7 rpm. Deck crane slewing bearings are usually composed of ferrules (inner ring, outer ring, upper ring/lower ring), rolling elements, spacer blocks, sealing belts and oil cups. With the continuous expansion of the application field of slewing bearing, its application ability in the field of ships has also been well displayed.

Deck crane slewing ring bearing-structure type
1.Four contact ball slewing bearings
2.Cross roller slewing bearings
3.Double row ball slewing bearings
4.Triple row roller slewing bearings
5.Ball and roller combined slewing bearings;

Deck crane slewing ring ------Technical Data:
1.Inner ring and outer ring material: 42CrMo, 50Mn
2.Steel ball or roller material: Gcr15, Gcr15 SiMn, 304 Stainless steel, 440 Stainless steel
3. Precision: P0. P6. P5.
4. Outside diameter: 1000~17000mm
5. Cage/retainer: Nylon or Steel Cage
6: Seal: NBR, Oil resistant rubber,Viton,Skeleton oil seal

Deck crane slewing bearing------Surface treatment:
1: black surface treatment
2: Surface sandblasting and painting
3: Surface chrome plating
4: Surface spray zinc treatment
5: Surface phosphating treatment
6: Dacromet treatment

Deck crane slewing ring------Packaging Details:
Step 1: Covered with the anti-rust oil
Step 2: wrapped with the plastic film;
Step 3: Packed with Kraft paper and professional belts;
Step 4: Put into wooden box to avoid the rust or the moist;
Remark: Normally, plastic film+ Kraft +belt+ wooden box, but customized packing available,

Deckcrane slewing ring bearing--- Advantages:
1. Good quality and competitive price
2. Trial order accepted
3. ISO certified company
4. OEM and ODM accepted
5. Can design and produce non-standard models according to the special requirements of customers.
6.Can provide BV, LR,DNV,CCS, NK,KR, GL,ABS certificate

Deck crane Slewing Ring- Seal
The sealing of deck crane slewing bearing is mainly to prevent the filled grease from leaking out, and also to prevent external dust, impurities and moisture from entering the inside of the bearing and affecting the normal operation of the bearing.

Since most of the slewing bearings work under heavy loads and low speeds, the sealing form of the bearings adopts two structures: rubber seal ring seal and labyrinth seal. The rubber sealing ring itself has a simple structure, small space occupation and reliable sealing performance. The disadvantage is that it is prone to early aging under high temperature conditions and loss of airtightness. Therefore, under high temperature conditions, the slewing bearing should adopt a labyrinth seal. In addition, the material of the sealing ring under high temperature is high temperature resistant fluoro rubber.

Deck crane slewing ring bearing- Maintain
1. The slewing bearing should be greased regularly. According to different types of slewing bearings, the specific grease filling time is as follows: the ball type is filled with grease every 100 hours of operation; the roller type is filled with grease every 50 hours of operation .

2. The sundries on the surface of the slewing ring should be removed frequently during use, and the sealing strip of the slewing ring should be checked for aging, cracking, damage or separation. If one of these conditions occurs, the sealing strip should be replaced in time to prevent debris from entering the raceway and the loss of grease.

3.Pay close attention to the operation of the slewing ring during use. If you find that the noise, impact, or power suddenly increases, you should stop the machine immediately for inspection until all the faults are eliminated, and disassemble and inspect if necessary.