2017 Shell global brand activity lands in Chengdu, using smart energy “shell” to move Chengdu

This event takes the opportunity of Shell's cooperation with six smart energy start-ups worldwide, through the interactive display and experience of the “Smart Energy Creative Carnival”, to share these energy maker innovative energy solutions with the Chinese public and support them. Innovation and cooperation to the "shell" move the future.

Since entering the Chinese market in 1894, Shell has always used more and cleaner energy solutions to fuel China’s social development and people’s lives, helping cities, communities and individuals in different historical periods to realize their dreams.

Event launch site

Over the past two years, Shell China has organized a number of community events in Weifang, Xi’an, Foshan and Chengdu. By combining local humanities characteristics, it called on local residents to join Shell to focus on energy innovation and fuel their dreams. This year's “shell” dynamic global brand activity is a fusion of energy innovation concepts from different regions of the world. With broader and deeper cooperation, it will open an “energy relay” on five continents.

At the event, four energy companies supported by the “Shell” Global Project are demonstrating their innovative technology applications – China’s local startup, Motion ECO, is able to turn waste oil into a biofuel “magic” GravityLight gravity lights converted to electricity for lighting, Pavegen power bricks that convert the kinetic energy of the footsteps into electricity, and bio-beans that convert coffee grounds into everyday energy. At the same time, interactive bicycles, handmade candles DIY and other projects also have interactive booths at the scene. Visitors at the site will experience “how to set up a recycling center” at these innovative energy booths to experience how energy makers can recycle energy through technological innovation. Liu Shutong, the founder of MotionECO's Dolan Circle Energy, also came to the event to share his energy ideas with the public using a TED-style speech “Let the oil fly”.

Interactive Experience

The scene also set up the Shell China History and Smart Energy Exhibition with the theme of "shell" moving the future, showing the many "firsts" of China's energy industry that Shell set up with partners in the course of deepening the Chinese market for 123 years. The story of fueling the dreams of Chinese cities, communities and individuals.

As a representative of the smart energy maker, Liu Shutong said: "Thanks to the support of the 'shell' brand for future global projects, we can better realize and promote entrepreneurial dreams - 'ditch oil' that endangers food safety. , convert to low-polluting biofuels, and achieve cleaner, recyclable energy consumption patterns."

It is reported that this event is also the third consecutive year that Shell China has brought brand new events to Chengdu. With the “shell” to move forward with the global project, Shell will continue to call for more communities, organizations, the public, and celebrities to join in the search for smart energy and the “shell” dream of a bright future.

Angular contact Ball Bearings

Angular Contact Ball Bearing has high limit rotational speed, they can carry radial load and axial load simultaneously, they can also withstand purely radial load. The axial load carrying capacity depends on the magnitude of contact angle and increases with increasing contact angle.

Structures

1. Non-separable angular contact ball bearings

This inner ring and outer ring of this type of bearings cannot be separated and comprises following structures:

Contact angle α=15°      counter bore on outer ring,7000Ctype

Contact angle α=25°      counter bore on outer ring,7000ACtype

Contact angle α=40°      counter bore on outer ring, 7000B type

2. Four-point contact ball bearings

This type of bearings is separable bearings. Whereof, QJ0000 type has two-piece inner ring and QJF0000 type has two-piece outer ring. Their contact angles are same as 35°.When received no load or pure radial load, the steel balls of the Ball Bearing contact with the four points of the rings. When it is received a pure axial load, the steel balls perform a two-point contact with the ring. In addition, besides the axial load from both directions, this kind of bearing can take torque-load as well.

3. Double row angular contact ball bearings

This kind of bearings can accommodate radial loads as well as axial loads acting in both directions; they can also take loading moment. They can restrain the axial displacement from both directions of the shaft or housing; the contact angle is 30° (or 40°)

Permissible tilt angle

There is only a little inclination between the inner ring and outer ring of angular contact bearings, the permissible tilt angle varies according to the internal clearance when the bearings are operating, the bearing dimensions, internal design, force and loading moment received by the bearings. The value of the maximum permissible tilt angle should be able to ensure that no much extra stress to be generated inside the bearings.

The tilt angle existing between the inner ring and outer ring will influence the bearing service life. Meanwhile, the running accuracy is decreased down and noise increased.

Tolerance and clearance

The tolerances of general angular contact bearings are class normal P0, class P5 and P6. Class P4 and P2 are applicable to machine tool spindles and bearing amount in pairs.

Clearance of single row angular contact bearing is decided by the contact angle, which is guaranteed by manufacturing.

Axial clearance of Four-point contact ball bearings is listed in table 1.

Cage material

Generally, the cage of angular contact bearing is pressed cage of steel sheet or brass cage, and it is solid brass cage for two row angular contact bearing.

Dynamic equivalent radial load

Single-row angular contact ball bearings with a contact angle of 15°

Single bearing or bearing in pairs(7000 C.7000 C/DT)

F_a/F_r≤e         P_r=F_r 

F_a/F_r>e          P_r=0.44F_r+YF_a

Back-to-back and face to face arrangements(7000 C/DB.7000 C/DF)

F_a/F_r≤e         P_r=F_r+Y₁F_a       

F_a/F_r>e          P_r=0.72F_r+Y₂F_a    

Single-row angler contact ball bearings with a contact angle of 25°

Single bearing or bearing in pairs(7000 AC.7000 AC/DT)

F_a/F_r≤0.68      P_r=F_r             

F_a/F_r>0.68       P_r=0.41F_r+0.87F_a   

Back-to-back and face to face arrangements(7000 AC/DB.7000 AC/DF)

F_a/F_r≤0.68      P_r=F_r+0.92F_a       

F_a/F_r>0.68       P_r=0.67F_r+1.41F_a    

Single-row angular contact ball bearings with a contact angle of 40°

Single bearing or bearing in pairs (7000 B.7000 B/DT)

F_a/F_r≤1.14      P_r=F_r             

F_a/F_r>1.14       P_r=0.35F_r+0.57F_a   

Back-to-back and face to face arrangements(7000 B/DB.7000 B/DF)

F_a/F_r≤1.14      P_r=F_r+0.55F_a      

F_a/F_r>1.14       P_r=0.57F_r+0.93F_a   

Four point contact ball bearings with a contact angle of 35°

F_a/F_r≤0.95      P_r=F_r+0.66F_a      

F_a/F_r>0.95       P_r=0.6F_r+1.07F_a    

Double-row angular contact ball bearings with a contact angle of 45°

F_a/F_r≤1.34      P_r=F_r+0.47F_a      

F_a/F_r>1.34       P_r=0.54F_r+0.81F_a   

Static equivalent radial load

Single-row angular contact ball bearings with a contact angle of 15°

For single bearing or bearing in pairs(7000 C.7000 C/DT)

P_0r=0.5F_r+0.46F_a   

P_0r<F_r  P_0r=F_r

For back-to-back and face-to-face arrangements (7000 C/DB.7000 C/DF)

P_0r=F_r+0.92F_a

Single-row angular contact ball bearings with contact angle of 25°

For single bearing or bearing in pairs (7000 AC.7000 AC/DT)

P_0r=0.5F_r+0.38F_a  

when P_0r<F_r  let P_0r=F_r

For two bearings in back-to-back and face-to-face arrangements

P_0r=F_r+0.76F_a

Single-row angular contact ball bearings with contact angle of 40°

For single bearing or bearing in pairs

P_0r=0.5F_r+0.26F_a   

when P_0r<F_r  let P_0r=F_r

For two bearings in back-to-back and face-to-face arrangements

P_0r=F_r+0.52F_a

Four point contact ball bearings

P_0r=F_r+0.58F_a

Double-row angular contact ball bearings with contact angle of 45°

P_0r=F_r+0.44F_a

F_r  Actual radial load of the bearing.

F_a   Axial load of the bearing

The values of e .Y .Y₁ .Y₂  see Table 2.

Table 1   Axial internal clearance of four point contact ball bearings

                                        μm

Table 2   Calculate Coefficient

                           Î¼m

Dw is the diameter of the rolling element

Angular Contact Ball Bearing

Machined Cage Angular Contact Ball Bearing,Pressed Cage Angular Contact Ball Bearing,One Row Angular Contact Ball Bearing,Two Row Angular Contact Ball Bearing

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