Overview of Jacking oil system:

Purpose:

The jacking oil system performs the following purposes:

•  Prevents metal to metal contact in the journal bearings by producing a hydrostatic oil film when the rotational shaft speed is too low to create a continuous hydrodynamic oil film.
•  Reduces the break away torque during run-up of the steam turbine rotor.

Function:

 This is reached by the following functions:

• Generates jacking oil pressure and flow.
• Guides and distributes jacking oil to the steam turbine journal bearings. 
• Drains the jacking oil into the bearing pedestal

Components:

 The following components are needed as a minimum:

• Jacking oil pump

• Pressure limiting valve

• Flow control valves

• Forwarding and distribution piping

• Lube oil tank

Principle:

1.The jacking oil system protects the turbines journal bearings during start-up and shut-down. The shaft of the steam turbine rests on the journal bearings.

2.Before the shaft is turned, jacking oil is supplied to the bearings to lift the shaft so that it floats on an oil film rather than on the metal surface of the bearings.

3.The jacking oil pump supplies the jacking oil system. This pump is an axial piston type, which is located on the lube oil tank. The Lube oil system feeds the jacking oil pump from downstream of the lube oil filter. A common AC motor drives both the jacking oil and turning gear pump

 

4.A pressure limiting valve maintains the pressure in the jacking oil system in accordance with the operating data. The oil passes through a flow control valve before entering each bearing. It drains into the bearing pedestal and flows back to the lube oil tank through the drain pipe lines, together with lube oil returning from the lube oil system.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Hydrostatic Turning Gear :

Purpose:

 The turning gear system performs the following functions:

• Continuously turns the rotor at low speed before start up and after shut-down.
• Ventilation, caused by the blades, prevents bending due to temperature differences between top and bottom, caused by natural convection after stand still of the hot turbine. 
• Avoids the rubbing of blading and seal strips due to rotor bending during restart.

Function:

This is reached by the following functions:

•  Pressure generation (motor / hand)
• Pressure control
• Engaging / disengaging of turning gear
• Turning of rotor
• Hydraulic control

Components:

 Therefore the following components are needed as a minimum:

• Turning gear pump
• Hydro motor with drive pinion
• Sliding piston
• Control solenoid valves (creep speed, rotary, engaging) 
•  Pressure control and reducing valves
• Hand pump

Facebook Fanpage

HOW TO: Update your Facebook Fanpage via RSS Feed?

I was searching for a solution to auto update my Facebook Fan page which will have link to my blog posts. Earlier I had used Facebook notes to update my RSS.

It was little buggy and stopped working after few days. To get it working I again reconfigured it and it started working well.

But the main problem with notes is it does not generate any traffic. It showed the entire post in the Facebook Fan page itself and also has no back-link to the blog. This does not help you to generate any traffic to your blog.

If you cannot generate good traffic out of Facebook Fanpage then its a big blow to your traffic generation strategy which might have a huge setback in revenue generation goals.

Okay enough cursing the notes now let me tell you a very nice way of getting your RSS feeds to be posted on your Facebook Fan page.

Just follow below steps to get your RSS feed to be updated on your Facebook Fan page with link back to your posts.

1. Log into your Facebook Account.
2. Visit the http://www.rssgraffiti.com/ and click on Start Sharing or
3. Directly visit http://apps.facebook.com/rssgraffiti/
4. Give Access to the plugin.

Is Vesta Actually a Planet Posing as an Asteroid?

Vesta's Surface Science@NASA

The asteroid Vesta was first discovered two centuries ago, but until NASA’s Dawn spacecraft arrived there earlier this year and began beaming back images and data, Vesta was seen as just another blurry, rocky satellite out there orbiting in the asteroid belt. Now, with Dawn’s instruments giving researchers their first really good look at Vesta’s composition and surface features, some astronomers are wondering if perhaps they haven’t discovered a small terrestrial planet rather than an asteroid.

The distinction between “dwarf planet” and “asteroid” is a bit nebulous and ultimately up to the International Astronomical Union. But in a post here last week we noted that the composition of Vesta is actually very similar to Earth’s--with separated layers like a core, mantle, and crust--suggesting that at one point in Vesta’s past it had a hot molten core that caused heavier materials (like iron) to sink inward while lighter materials flowed to the top.

This process is called differentiation, and it occurred on all of the terrestrial planets (Mercury, Venus, Earth, and Mars) in our solar system. Topographic characteristics like huge mountains and valleys, ridges, craters, and plains are lending further credence to this analysis. All told, Dawn researchers believe Vesta formed more like a terrestrial planet than the average asteroid.

That formation would’ve happened about 4.5 billion years ago at the same time the rest of the planets were forming. As Jupiter gathered mass, the gravity it exerted on the asteroid belt interfered with the coalescing of material there. Vesta was probably on its way to becoming a terrestrial planet before its growth was stunted. Still, it differentiated in its early life just like a planet, and the Dawn team is now looking for volcanoes and lava flows that it thinks were once present on Vesta’s surface (not to belabor the point, but the presence of volcanoes would be super Earth-like).

All that points to the possibility that Vesta could be reclassified as a dwarf planet, joining the likes of Pluto and Ceres--another asteroid belt dweller already classified as a dwarf planet and the a research target for Dawn starting in 2015.

Increase your Blog traffic ?

Increasing blog traffic is one of the major concerns of bloggers. After all its one of the important measure of your blogging success. Increasing blog traffic was one of the first articles i read online and it feels really good to write something about that i have learned over time.

To summarize the entire post in few words, I believe the major contenders in increasing blog traffic are your blog posts frequency (quality post with proper SEO) and posting timings. These few factors play the vital role in driving traffic to your blog.

And yea, consistency is a backbone too! So lets start with our exciting list of the top 20 ways by which we can boost our blog traffic.

Google launches New Security for your Gmail Accounts

Watch this video.........
It is giving new step-2 verification whenever u login from different PC's keepig your account being hacked 

by Phishing,key logger softwares etc.......so make your account secured..

Bermuda Triangle Mystery

Computer studies of ocean floors around the world, particularly the area known as The Bermuda Triangle, reveal evidence of massive methane explosions in the past. For years, believers in the paranormal, aliens, and other outlandish theories pointed to the the disappearance of ships and aircraft as an indicator of mysterious forces at work in the “Devil’s triangle.” Scientists have finally pointed the rest of us to a more plausible cause.

The presence of methane hydrates indicates enormous eruptions of methane bubbles that would swamp a ship, and projected high into the air- take out flying airplanes, as well.

Any ships caught within the methane mega-bubble immediately lose all buoyancy and sink to the bottom of the ocean. If the bubbles are big enough and possess a high enough density they can also knock aircraft out of the sky with little or no warning. Aircraft falling victim to these methane bubbles will lose their engines-perhaps igniting the methane surrounding them-and immediately lose their lift as well, ending their flights by diving into the ocean and swiftly plummeting.

Bluetooth

When you use computers, entertainment systems or telephones, the various pieces and parts of the systems make up a community of electronic devices. These devices communicate with each other using a variety of wires, cables, radio signals and infrared light beams, and an even greater variety of connectors, plugs and protocols.

There are lots of different ways that electronic devices can connect to one another. For example:

• Component cables
• Electrical wires
• Ethernet cables
• ­WiFi
• Infrared signals

The art of connecting things is becoming more and more complex every day. In this article, we will look at a method of connecting devices, called Bluetooth, that can streamline the process. A Bluetooth connection is wireless and automatic, and it has a number of interesting features that can simplify our daily lives.