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If you’re new to the world of hydraulics, then you may have a few questions about what hydraulic power packs can offer. In this blog post we look to answer some of the most basic questions about why you may want to use them.
Hydraulic systems are used in machinery and tools to lift, pull or push weights. In addition to being utilised in the industries of construction, fishing and farming they can even produce the power for your favourite rides at amusement parks. The dustmen use them to empty your wheelie bins of rubbish. Even rescue workers make use of hydraulic power when they use cutters and car mechanics use hydraulics to lift up cars to work on.
Another application of hydraulics is to work the brakes on your car. When your mechanic tells you that he needs to ‘bleed’ your brakes it’s because any air in the system will prevent the brakes from working correctly. A broken or leaking hose will interfere with the fluid level too.
The liquid that can take such high pressure in the hydraulic power unit is known as hydraulic fluid. Fluid is used as it’s able to pass freely through tubes and hoses to control the operation of the machine. It’s important to keep this fluid clean and free of any foreign particles. This is the reason that filters are used. Any excess fluid is passed through a reservoir.
The hydraulic power pack is a component of a hydraulic system that provides the power to push the uncompressible liquid through the hoses or pipes to lift or leverage a weight. Used in combination with pipes, hoses, the hydraulic oil and reservoir tank, it’s amazing what’s possible with hydraulics. They have been in operation since 6000AD and now play such an integrated part in our everyday life that we don’t always recognise them when they are in use.
To find out more about hydraulic power packs, visit our Hydraproducts Power Pack page at www.hydraproducts.co.uk/hydraulic-power-packs.aspx
In this article we want to explain the ins and outs of hydraulic powerpacks. A vital piece of equipment that is used with so many machines we see every day.
In a nutshell, hydraulic powerpacks are self contained units that are used instead of a built in power supply for hydraulic machinery. Hydraulic power uses fluid to transmit power from one location to another in order to run a machine. It really is as simple as that.
So what do they look like?
In order to recognise and better understand hydraulic powerpacks, it is a good idea to get to know the key components. Hydraulic powerpacks come in many different shapes and sizes, some are very large and stationary whereas others are much smaller and more compact. In fact, some hydraulic powerpacks are so compact that they can easily be transported in a small van or even an estate car.
The only real way to identify hydraulic powerpacks is through its main components. No matter the size of the unit, all power packs will have the following; a hydraulic reservoir, regulators, a pump, motor, pressure supply lines and relief lines.
What do these components do?
It may be obvious to some but in this post we wanted to explain every component as simply as possible. So here goes.
First up is the hydraulic reservoir which quite simply holds the fluid. Reservoirs will come in different sizes.
Then we have the regulators. Regulators are vital as they control and maintain the amount of pressure that the hydraulic powerpack delivers.
Thirdly we have the pressure supply lines and relief lines. The supply line simply supplies fluid under pressure to the pump and the relief lines relieve pressure between the pump and the valves. The relief lines also control the direction of flow through the system.
Finally we have the pump and a motor. We will begin with the simpler component of the two, the motor. The motor is simply there to power the pump. Easy as that. Now the pump generally performs two actions. Firstly, it operates as a vacuum at the pump inlet and through atmospheric pressure forces fluid from the reservoir into the inlet line and then to the pump. It then delivers the fluid to the pump outlet and pumps it into the hydraulic system. We did warn you that the second part would be slightly more confusing.
So what is the function of hydraulic powerpacks?
Hydraulic powerpacks deliver power through a control valve which in turn runs the machine it is connected to. Hydraulic powerpacks come with a variety of valve connections. This means that you can power a variety of machines by using the appropriate valves.
Hydraulic powerpacks are relied upon by a range of different machines that use hydraulic power to do its work. If a machine is required to carry out heavy or systematic lifting then its likely it would need help from a hydraulic powerpack.
To make it easier for you to understand, we have included a list of trades that regularly rely on our powerpacks. On a building site you will see machines like bulldozers and excavators, which both need hydraulic powerpacks. But, it is not just on building sites that you will find these types of machines. Fishermen and mechanics both need hydraulic powerpacks too. If we did not have them then how would fishermen lift their nets or how would mechanics lift our cars?
When picking a hydraulic powerpack there are a variety of pumps and options to pick from and it is important to pick the right pack to meet your machines needs. It is also important to consider a pack that will help maximise productivity and minimise cost.
Many people will overlook the necessity of hydraulic powerpacks, but they really are vital to ensuring our society runs efficiently.
Do you need to maintain hydraulic powerpacks?
Yes you do and this is hugely important! Hydraulic powerpacks require regular maintenance to ensure they are working properly and safely and to help extend their life. Maintaining hydraulic powerpacks is relatively simple and includes checking the tubing, this can be for any noticeable problems such as dents or cracks. It is also vital to regularly change the hydraulic fluid and look at the reservoir to check for any corrosion or rust.
What hydraulic powerpacks do we provide?
Generally we provide four different types of hydraulic powerpacks. You can pick from a standard powerpack, a mini powerpack, a micro powerpack or a bespoke powerpack.
The standard hydraulic powerpack uses a standard range of modular components and is ideal for the most demanding industrial applications. The mini powerpack is ideal for applications requiring up to 5.5kW. The micro hydraulic powerpacks were originally produced for mobility applications, so are great for when space is limited. Finally, if none of these seem to fit your needs then we offer bespoke hydraulic powerpacks ensuring your application gets the hydraulic powerpack it requires.
Finally, who is the genius behind hydraulic powerpacks?
The man behind hydraulics was Laissez Pascal. A French mathematician, physicist and religious philosopher who lived in the mid seventeenth century. Pascal made observations about fluid and pressure which led to Pascal’s law. Pascal's law states that when there is an increase in pressure at any point in a confined fluid, there is an equal increase at every other point in the container. Hydraulic powerpacks have been designed based on Pascal's law of physics, drawing their power from ratios of area and pressure.
So, interested in our Power Packs? Come on over to the main website and see what we can do for your Hydraulic Power Pack Needs .
As you are aware we love hydraulic power, we wouldn’t do what we do if we didn’t. But, today we wanted to write an article on some of our favourite machines that are powered by hydraulic powerpacks. We have told you before that the world is a better place because of hydraulic powerpacks, and today we are going to prove it.
Firstly we have chosen to look at how hydraulic powerpacks help the everyday mechanic.
In the UK, there are as many as 36 million cars registered on the roads. At many points during a cars life, they will need to visit a garage. Hydraulic lifts are vital for mechanics to see and get under your car and our hydraulic powerpacks can easily connect to your mechanics lift, providing all the power it needs to lift up your car. This in turn not only makes a mechanics job much easier, but it also means your car has been thoroughly checked over. Thanks to hydraulic power your car will spend a minimal amount of time out of action.
Hydraulics has been around for a very long time. But are you aware of how far it has actually come? You wouldn’t be alone if you responded with no. It is a very technical subject that can be quite difficult to understand, but in this article we want to tell you the story of hydraulics! We want to share with you who discovered hydraulics, what it was originally used for and how hydraulic power got to where it is today.
So why don’t we start at the beginning! Where does the word hydraulic come from?
The word hydraulic originates from the Greek word ‘Hydros’ which means water. Why water? Well, this is because water was the first liquid to be used in the hydraulic system. Today, hydraulics includes the physical behaviour of all liquids, not just water.
Hydraulic power packs, such as the ones supplied by Hydraproducts, are a vital part of the construction industry. With a huge push on new home building across the country, it is a daily occurrence to see heavy plant equipment moving earth and preparing groundworks for construction. All of these ‘earth moving’ machines use hydraulic power to effect motion in the moving parts, with hydraulic rams serving as the muscles of the machine to raise and lower a digging arm, or to move large pipes into place for infrastructure development.
Hydraulic power packs allow the machinery to generate more power in the moving parts than if just the engine power alone was directly driving the hydraulics, so they mean a smaller excavator can move as much as a larger one without the need for that extra space. On new build sites, there is a lot of space to start with, so there is no issue with the largest machinery manoeuvring around the site. When houses start to go up and roads are installed, there is less machinery space and it makes sense to use a smaller version of a particular machine that has the same power capabilities.
A hydraulic power pack can also reduce the amount of fuel used to drive the hydraulic components, as most heavy earth moving equipment has a range of modes that can be selected to give the right amount of power while remaining economical. Digging out large amounts of earth will use a lot of power, and this can be increased above the machinery capacity by using a hydraulic power pack. Fine grading of embankments, or excavating over mains power, gas or sewage pipes requires a fine degree of control that is best achieved at a lower power. Hydraulic power packs can help to control this when used in combination with the modes available on the machinery itself. The effect is a reduction in fuel used to generate the hydraulic power and a considerable cost saving over the lifespan of a project.
Because the earth moving equipment uses hydraulics there is no need to employ a separate engineer to maintain and repair the hydraulic power packs as they use the same technology, so there is no extra cost in maintenance terms, just the cost of the power pack. When considering this investment, it is important to understand that the better control leads to improved productivity and workforce morale, as well as a lower outlay on fuel.
Hydraulic power packs are not confined to use in the preparatory stages of a large building project, however, they are also used to work cranes, that lift roof struts into place; in forklifts, that move materials around the site and even in concrete pumping machines, that are used to lay floors and external hard standing surfaces. Hydraproducts are very happy to work with equipment manufacturers to find or design the perfect hydraulic power pack for the construction industry.
What do farmers, firemen and fruit pickers all have in common? Well, firstly they all begin with F, they’re all hard grafters but the most important similarity is that they all work with some pretty cool machines on a daily basis. I mean if they didn’t then how would farmers harvest potatoes, firemen rescue people who are stuck at the top of burning buildings and how would fruit pickers pick fruit from the highest trees? Thanks to the machinery they use (which are all powered by a hydraulic power unit), their jobs are made so much easier.
So what is a hydraulic power unit?
In a nutshell, a hydraulic power unit is a mechanism that transforms one form of energy into a fluid form. The hydraulic power unit is capable of moving the fluid, if the fluid reaches obstacles it pressurises and is then capable of mechanical force. The power transported by the fluid is then used to power machinery and it could easily lift a car or a tree.
What affects a hydraulic power unit’s performance?
Some important elements that impact the performance of a hydraulic power unit are the reservoir volume, power capability and pressure limits. Its physical size and pumping strength also play a part in its performance.
Who relies on hydraulic power units?
As we have already mentioned hydraulic power units are used by a variety of industries across the globe. Commonly they can be seen powering machinery in the construction, automotive, manufacturing and entertainment industry and the power supplies vary depending on the machine it needs to work with.
In everyday life you may be surprised at the amount of machines powered by hydraulic power units, that help society function that little bit better. From bin men and their garbage trucks, to fairground rides that we like to enjoy, hydraulics is a big part of our life and most of us don’t even realise. All the drivers among also use the power of hydraulics whenever we brake.
After this article, I'm sure you would agree with us when we say that hydraulics are pretty impressive.
Hi Everyone, here Hydra Products we have decided to start utilising our Blog more to keep you up to date, informed, and hopefully occasionally amused by our ramblings! There’s lot’s more to come but just to make sure we’re all starting on the right page we thought we’d better just give you a very brief history of Hydraulic power...
Water has played a huge part in the advancement of mankind and has been a powerful source for us to harness for thousands of years, right up to present day. Harnessing the power of water has enabled us to carve out a living using water wheels: to produce our food, tools, wood, clothes, paper, iron, marble, cotton and wool. Today, “fluid power” or hydraulic power relies on pressurized fluid in order to produce power. It’s all around us, in everyday objects, but if we look back in time, it was a while before it was used the way it is today.
In Imperial Rome, water was used to power mills to produce flour, saw stone and timber. In Britain, water was used to extract lead from tin ore in a process known as “hushing”. Many years later this was developed into hydraulic mining which was used during the California Gold Rush.
In 1648, a young French mathematician and physicist, Blaise Pascal, made a discovery that was to become known as Pascal’s Law. Through his works he realised that “pressure exerted anywhere in a confined incompressible fluid is transmitted equally in all directions throughout the fluid such that the pressure variations (initial differences) remain the same”. This laid the groundwork for further insights into how fluids could be harnessed for energy and in 1738, Daniel Bernoulli first formulated what was to become known as Bernoulli’s Principle which describes the behaviour of a fluid under different conditions of flow and height. This was later used in the network of high pressured water pipes between various generating stations which used steam driven pumps and mills that required power, allowing power to be transmitted over larger distances. Unfortunately this particular project did not continue for long as the development of electricity was found to be a far more convenient and, at the time, a much more suitable way of powering devices.
It was towards the end of the eighteenth century (1795) when Joseph Bramah, patented the hydraulic press. It was based on Pascal’s Law which formed the groundwork for the science of hydraulics. Not long after, the Americans developed the technique of producing electricity using hydropower and hydraulic power plants began to be built. Once the industrial revolution had firmly established itself, engineers and industrialists across the world realised they could utilise Bernouilli’s principles but on a much bigger scale. In the late 19th century, the first hydropower scheme was pioneered by William George Armstrong whom many see as the grandfather of Hydraulic Power (along with Joseph Bramah). A keen fisherman, after spending the day fishing and looking at the watermill, Armstrong decided that it wasn’t the most efficient way of harnessing energy. Upon returning home, he set about designing a rotary engine that was to be powered by water. When nobody showed any interest in it, he set about a redesign, and ended up with a piston engine. This led to the development of hydraulic power-pipe networks (with hydraulic power pipes being used to carry pressurised liquid to transmit mechanical power from a main power source) which were used to power cranes throughout Britain’s cities and also in Geneva, Switzerland. As time has gone on we have seen the development of different hydraulic parts including seals, control values and accumulators, all of which have lead to further uses of hydraulic power.
Today there are many different forms of hydraulic power and water power that are currently being used or developed. The majority of them generate electricity but there are a few that are mechanical. We see examples of hydraulic power in use all around us today and probably the best place to see it at work would be on a building site: diggers, cranes, bulldozers and all kinds of heavy equipment vehicles rely on power from hydraulic drives to ensure they have the power to get the job done! A hydraulic drive is a device that uses pressurised fluid in order to drive the machinery and it is made up of many components, of which an important one is the hydraulic pump which can have a power density of up to 10 times that of an electric motor. It’s not surprising that we are still harnessing the power of these incredible pieces of engineering more than 200 years after they were first conceived!
Hydraulic power is currently being developed further year after year. It will be extremely interesting to see what the developments will be in the future.
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