LG Sigma Elevator Spare Parts, LG Elevator Spare Parts, Sigma Elevator Spare Parts
Sigma
Elevator Company is a subsidiary of Otis Elevator Korea (OEK) in South Korea
for all overseas/export markets. It was founded in 2000.
Starting
in 1968, "Goldstar" elevators, and later on, "LG"
elevators, were counted among the world's top elevator brands. With the
beginning of this new millennium, that legacy lives on through the birth of
"SIGMA" elevators.
SIGMA
Elevator Company will continue on with its mission of supplying elevators and
escalators to more than 50 nations worldwide through its global network of 11
sales companies, 2 offices, and 52 agents or distributors.
SIGMA
Elevator Company is dedicated to providing its customers with the best quality
products and services. SIGMA elevators feature unmatched safety, ride comfort,
and modern design. SIGMA escalators and moving walkways are held to similar
safety and comfort standards and are integral parts of our modern urban
aesthetics.
Changwon
factory, Korea, the main factory of SIGMA Elevator, has long been a well-established
name in the global elevator industry. SIGMA`s Dalian factory in China produces
elevators & escalators to meet the demands of the local and worldwide
markets as well.
SIGMA
Elevator Company is committed to increasing customer value through a sharp
focus on product innovation and customer satisfaction. With technology
developed over the past 30 years, an enduring innovative spirit, and
enthusiastic attitude towards providing customer value, Sigma Elevator Company
stands by its product and service lines with confidence.
Sigma
currently has businesses in more than 75 countries worldwide, and subsidiaries
in five countries; Hong Kong (China), Vietnam, Thailand, Malaysia and
Singapore.
In
the United States, Sigma elevators were distributed by CemcoLift, which was a
historic elevator company bought by Otis and based in Hatfield, PA. However, in
2012 CemcoLift has gone bankrupt and replaced by a new company called Minnesota
Elevator Solutions.
It's
headquarter, factory and testing tower are located in Changwon, South Korea,
which are also operated by Otis Elevator Korea. It also has a secondary factory
in Dalian, China, opened in 1998 to meet demands on Chinese elevator market.
In
2014, Sigma had a partnership with EXPRESS Elevator Co., Ltd., an elevator
company based in Suzhou, China as well as a subsidiary of Otis. In 2016,
Express/Sigma opened their headquarters in Suzhou, China
LG
Elevators was the elevator and escalator division of LG Electronics. It was
acquired by Otis in 1999 and was later known as LG-OTIS Elevator Company.
LG
changed its name from GoldStar in 1994 after GoldStar merged with Lucky
Chemical. In 1999, it was acquired by Otis Elevator Company, later known as
LG-OTIS Elevator Company from 2000 until 2003, when it was renamed to OTIS-LG
Elevator Company. Later in 2006, OTIS-LG was again renamed to Otis
Elevator Korea.
LG-OTIS
Elevator Company (later OTIS-LG Elevator Company then Otis Elevator Korea) was
a joint venture company between Otis and LG Electronics` elevator and escalator
division, LG Elevators in South Korea. It was formed in 2000. The brand was
renamed to OTIS-LG Elevator Company in 2003 and later Otis Elevator Korea in
2006, where it is currently known as that in South Korea
LG Sigma Elevator Spare Parts, LG Elevator Spare Parts, Sigma Elevator Spare Parts CEP Elevator Products ( China ) Co., Ltd. , https://www.zjelevatorcontrolsystem.com
/*728*90 created on 2018/5/16*/ var cpro_id = "u3440131"; Home>Bearing knowledge>Discussion and discrimination of crankshaft ablation (2) Analysis and Discrimination of the Causes of Crankshaft Ablation (2)
5 crankshaft main journal, connecting rod journal shape dimension is out of the crankshaft main journal, connecting rod journal or cylinder main bearing hole, connecting rod big hole cylindricity or taper difference; both will make the journal and bearing bush gap intermittent (continuous) or tapered. It is not guaranteed to form a good smooth oil film. /*250*250 was created on 2017/12/25*/ var cpro_id = 'u3171089';
After the new machine or overhaul, the diesel engine is not put into operation for a long time; it is easy to attack the above-mentioned appearance; the journal scale can be measured. If the journal is ablated, the adjacent journal can be measured (the adjacent corresponding journal is used according to the convention) Use the same equipment, the same cutting tool processing; then it can represent the shape error of the ablation journal).
6 The crankshaft main journal and the connecting rod journal have poor surface roughness due to poor roughness; there are many metal peaks on the outer surface of the journal; it destroys the integrity and continuity of the smooth oil film between the journal and the bearing bush. The peak directly conflicts with the bearing bush; it constitutes crankshaft ablation.
Frequent attacks occur after the new machine or overhaul. The diesel engine is not put into operation for a long time. If the measured journal is ablated, the roughness detector can be used to measure the adjacent corresponding journal (since the case is; the adjacent equipment is selected by the same equipment, The same cutting tool is processed; then the measured roughness can represent its ablation journal roughness).
7 crankshaft, flywheel, clutch dynamic balance, ultra-difference dynamic balance, super-difference; crankshaft high-speed rotation, inertial force; the crankshaft journal and bearing bush cooperation gap will be damaged; severely, the journal and the bearing bush directly collide to form crankshaft ablation .
The problem usually occurs when the machine travels for 10,000km. After the crankshaft is ablated, the residual debris on the journal can be removed; the balance is checked from the head; the unbalance can basically indicate the ablation of the axicon.
8 Protection and protection If the diesel engine is not operated for a period of time, if it is not properly protected and protected in time, the components such as the oil pump pressure limiting valve will be worn and deformed. The oil filter element will be blocked by oil and sludge; Falling; causing crankshaft ablation.
Crankshaft ablation; mainly due to the failure of the crankshaft journal and the bearing bush to form a useful smooth oil film; the crankshaft journal directly conflicts with the bearing bush. When the diesel engine attacks the crankshaft ablation; it will emit white smoke; announce metal impact abnormal sound Sound; even the crankshaft and the bearing bush are locked together and cannot be changed. Therefore, it is necessary to correctly analyze and discriminate the cause of the attack.
1The quality of the oil is poor 1) The quality of the oil is low. The quality grade and viscosity grade of the selected oil are lower; or the different trademark oils are used for blending; the performance of the oil is not up to the demand, and a lot of dust is mixed in the oil application process. And because the working temperature of the diesel engine is too high, the oil is oxidized and transformed. The oil of oxidized bismuth is black and dull; the concentration is increased; the oil is rubbed with two fingers; the oil is found to have dust, impurities, etc. If the oil used is found to have the above appearance It is necessary to replace it in time.
Recommend to friends comments close window Bearing related knowledge Inch Tapered Roller Bearing LM12749/10
Skill analysis: the ultimate axial bearing capacity of the bearing can be analyzed
Analysis of the effect of TIMKEN bearing preload on the raceway noise of NSK bearings in Japan
This article links to http://
Please indicate the bearing network http://
Previous:Preparation of Rolling Bearing Practices Viewing Next: New Wind Power Pitch Bearing Spraying Equipment
Analysis and Discrimination of the Causes of Crankshaft Ablation (2)
Source: China Bearing Network Time: 2014-05-23