Safety test of ferris wheel bearing

About the test—— ferris wheel bearing installed in Beijing not only requires a 100 meter high tower, but also need for many eye bolt for bearing rising.

 Some people think this is a very simple thing. But far from it, We conducted a series of complex experiment in Herzogenaurach ,Schaeffler group headquarters . Technical personnel must examine these eye bolt line whether can withstand so large a weight. Because one thing must be guaranteed, it is safe.

The true test of patience in the process of bearing

Finally, the  bearing is further processed and installed by large bearing expert FAG in Wuppertal . Although we have a large bearing experience of ten years, but the project was the emergence of one or two unexpected things, product manager Gerd Benninghoven said.

  The outer ring reluctantly into hardening furnace. However, no one can know the process how it would affect the material. In fact, bearing ring diameter during heat treatment reduced about 1 cm. In the final machining process, in any case range must be restored.For such a large part, this is a very challenging work.

  Benninghoven said,just imagine, in the processing cycle , the length measured by a tool is more than 20 kilometers, this is because it needs to pass through metal, which is the true test of patience.

Design engineer's memory

Worked in the spherical roller bearing production line design engineer Rainer Schrode said. So the first thing we need to do is to confirm whether our production equipment to produce such required bearing.

  Whether the production of tools can produce such bearing size? Is setting the fire big enough? Can the starter afford this weight? What is the best way to China? How to ensure a smooth installation? A multitude of things, but in the act with united strength, design, construction and production departments of the actuarial, step by step, we finally determined the scheme.

  Van der Knokke recalls,in this process, the team members to continuous innovation, a time to adjust the schedule. Circular bearing is composed of a supplier in Italy dozen circle casting. Barrel roller is  making in FAG workshop of Eltmann, finalize the design is in Wuppertal, and then was sent back to the Eltmann for the new grinding.

Beijing bearing standard contrast the world's largest Ferris wheel

The real work that engineers are impressive, only when you really start to face with huge bearing imagined in the silver light you can realize its true size, an unprecedented huge monster.

  Schaeffler heavy machinery group company's person in charge Henri van der Knokke recalled,When a written request we received Beijing great wheel dimensions and specifications, the first feeling is not believe my own eyes, when we research this project, like a spherical roller bearing require to undertake such a large size is unprecedented.

  In fact, the team was involved in the design, the construction was acclaimed as the world biggest Ferris wheel of the London Millennium years ferris wheel bearing. But Beijing ferris wheel was put forward further requirements: bearing outside diameter size of London is 2600 mm, but this is just the standard of inner ring hole bearing  in Beijing.

The huge monster rotating bearings

In Schweinfurt, August 29, 2008. The two Normal spherical plain bearings in fact is nothing special,except its unordinary size, external diameters 3200 mm, 2600 mm inner hole, ring width of 630 mm.

  Each bearing are connected with 118 rollers, each weighing almost 20 kilograms.
A total of nearly 11 tons of steel insert each bearing,which can be very appropriate to call  the Huge Monster Rotating bearings. Soon the huge monster will start the service in 108 meters above the ground,new Beijing Ferris wheel is a 208 meter high - this huge monster just like two huge bearing rotating around it.

  The ferris wheel design can accommodate 1920 tourists, 20 minutes of air travel to watch the beautiful scenery of Beijing .

The ferris wheel appearance of Haihe River

In the German custom of Cihai Bridge giant wheel bearing reached  construction site of Tianjin,China,2007.  After the installation is complete implementation of the ferris wheel  installed on the Cihai Bridge Human character support, basicly complete in June. 110 meters in diameter of the giant ferris wheel  appear on Haihe river.

  According to the construction personnel of Cihai Bridge  introduction, the Cihai Bridge Ferris wheel is the world's only built on the bridge Ferris wheel, the 110 metres in diameter, which is relatively high for carrying the ferris wheel rotating bearing technology requirements.

  The bearing in the German custom diameter of 3.5 meters, is located in the center of the main bearing of Cihai Bridge Ferris wheel.

  Reportedly, at present, there are some parts of Cihai Bridge in the field of production, for supporting the Cihai Bridge giant Ferris wheel Human word bracket has been installed, with the installation of the ferris wheel condition.

  The ferris wheel of the installation is a difficult engineering, roulette will be divided into 24 equal parts, a section to install, just as the segments into a big orange.

Strong mobile crane market

In March, 2009 ,truck crane, crawler crane ,lorry-mounted crane， wheel crane and other cranes of radar bearing four cumulative sales of more than 3000 , 56.82% growth than last month,  9.05% over the same period last year. The first quarter of four cranes of cumulative sales of 7056 units,4.40% below  compared to the same period last year.

  Overall, the recent China four categories of ship loader bearing market continued to show strong market development trend, showing a basic Production and Sales Booming situation. But due to the 1-2 month crane market dragged down, four categories of mobile crane market performance is still slightly less than a quarter of the same period last year.

According to the general rising market demand, a mobile crane bearing market must also ready for action.

The ferris wheel bearing tragedy

In December 4, 2014, Pakistan's second largest city Lahore  Jalloh  theme park ferris wheel bearing fault occurred, 5 school teachers and students died on the spot,leaving 47 victims.
  At 11 AM, the local  West school teachers and students sit to pull on the skyscraper wheel, with the big wheel rotation. When the ferris wheel to the top speed, bearing rupture suddenly,the ferris wheel like huge monster for the centrifugal force quickly to outside the crowd came hurtling, hitting people picnic on the grass, on the spot to fall dead, killed 5 teachers and students, of which 3 are children of 8-13 years old, the other 2 are old.

  According to reports, the Jalloh theme park recreation facilities in disrepair, serious lack of maintenance. Events soon, casualties of teachers and students family members decided to jointly to resort to the law, requirements for the park managers to make tough sanctions.

  Anything has use period, but LYHY ferris wheel bearing ,metallurgical bearing and mobile crane bearing can do our best to provide the best quality service.

Crane bearing and the ship crane bearing technical characteristics comparison

• Harbour mobile crane bearing.

The three row roller slewing bearing of port crane usually use internal or external toothing diameter 4 meters, to withstand overturning moment is very high.

• Stacker reclaimer and rotary bearing

Slewing bearing stacker reclaimer used usually adopts ball column combined type, three rows ofroller type and cross roller type, diameter of 3 meters most super. 

  Because of the poor working environment, dust, this kind of bearing has high carrying capacity, long service life, good sealingperformance characteristics. Considering the design of seal, uses the double sealing, plus steel protection sealing solution.

• The  ferris wheel bearing of large slewing bearing

LYHY bearings are used for the four point contact ball slewing bearing the ferris wheel.

• Ship unloader rotary bearing

Slewing bearing ship unloader with external teeth usually adopts three rows of rollers in structure,about 4-6 meters in diameter.

• Engineering machinery rotary bearing

Rotary bearing the most widely used most, generally not more than 4 meters in diameter, structure based on four point contact ball.

• Tower crane bearing

Application of rotary bearing the most concise, also called slewing bearings, ball and roller are to.

• Ladle Turntable Bearing

• Shield machine bearing 

The slewing bearing the most top application. High safety, high reliability, high stability, high value.

• Radar bearing

Belongs to the military bearing, is not introduced, quality is the first.