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If you’re a hydraulic power engineer and you follow our blog posts, we are now going to take you on a journey deeper into our niche and introduce you to one of our hydraulic power unit related specialist areas, known as LARS or Launch and Recovery Systems.
To understand what’s involved in these machines that are used offshore in marine environments such as on oil rigs, we need to get familiar with the individual components:
Every launch and recovery system is equipped with an umbilical winch. This has to be able to accommodate the entire length and diameter of the remotely operated vehicle umbilical. This winch will typically make use of a level wind mechanism to cater for even spooling of the umbilical cable on to the drum of the winch.
To power the winch there is usually a suitably sized hydraulic winch motor attached that can pull in the remotely operated vehicle (ROV). This is where the hydraulic power pack comes in to play.
A Crane or ‘A’ Frame will need to be able to lift and on-board the ROV. It will also need to be strong enough to be able to accommodate the weight of the vehicle plus its load.
Most often it’s easier to put the ‘A’ frames and the hydraulic power unit HPU together on a dedicated mounting skid base so that they can be easily welded to the deck. Although they are sometimes positioned to be stand-alone units.
It’s a requirement for the LARS to be certified for use. This will generally include a Lloyds witness of the system load tests or DNV design approval. These are required prior to manufacturing. They are something that can cause delay and is most often extra cost.
A bit of a crash course into the world of LARS. We will be featuring more about this fascinating area in our blog posts, so if you’re unfamiliar with the offshore industries, you will have a chance to find out more about them and how we apply our hydraulic power packs in this field.
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 .
Having spent over two decades developing a wide range of appropriate hydraulic power units, we have been told by our customers that our hydraulic power units are on point. Not only are they well thought out but they are maintenance friendly, efficient and leak proof. Each one is designed using the most advanced 3D modelling in combination with reliable fluid power analysis tools.
Our hydraulic power units range from micro sized to no-nonsense 375kW systems that are used offshore in the subsea oil and gas industry. Hydraulic power units are often used for serious hard core roles. After all, what else can perform such feats as pulling cars out of canyons, moving massive volumes of earth or lifting giant trees? The only machines that can are hydraulic power units that can convert the movement of liquid into mechanical force.
Power units are actually fairly simple. Their task is to pressurise fluid so that it can perform tasks such as those mentioned above. The fluid is then pushed along through a series of values as it cannot be compressed, so any pressure will cause it to move. At the end of the line, it will go into a piston which will extend as it fills and this is where the magic happens. A giant boulder is lifted up from a river bed or a disabled person’s wheelchair is lifted onto a bus. There are no end to the possible applications of hydraulic power.
Here’s an introduction to our range of hydraulic power units and examples of how they can be used in factories and out in the field:
Standard Hydraulic Power units
The most common requirements are satisfied by these workhorse power units. They offer AC motors up to 30kW and can produce flows up to 100 litres per minute. Holding up to 180 litres in the reservoir and producing hydraulic pressures of up to 250 bar, these machines are used across all manner of industries.
Easy to configure, assemble and maintain, these HPUs are often used for any application that needs a dependable source of power. Industrial machine applications include punching machines, niche areas such as charcoal drying drums and performing any lifting duties.
Mini Hydraulic Power Units
The little brother of the standard isn’t workshy either. Expect AC and DC hydraulic power units that product 30 litres per minute with reservoirs that can hold up to 100 litres and produce 250 bar pressure. These are the machines that can handle up to 5.5 kW.
Our customers find that our mini hydraulic power unit is perfect for a range of applications such as cardboard compacting machines, climbing walls, car park access control equipment and machine tool clamps. They have been designed for easy maintenance and deliver years of trouble free operation. Some of our customers use them on applications that have produced over 1 million operations.
Micro Hydraulic Power units
The smallest of our everyday offerings can still deliver serious power. Although it may have only an 89 mm wide footprint, this little beast is able to handle both reversible and uni-directional work, depending on what you need. DC motors range from 150 to 800 watts and the AC goes from 150 to 275 Watts with flow rates of 5 litres per minute. Hydraulic pressures of 200 bar are the norm.
Perfect for those applications where hydraulic power is needed but the space is limited. For example, our customers have fitted these to step lifts, wheelchair lifts and on through-floor lifts. Although they were originally designed for mobility applications, they have been found to be ideal for wider use including unmanned operations of pipeline control valves to tasks such as lifting glass into place on tall buildings.
Bespoke Hydraulic Products and Systems
Whatever you need, we can design it for you. We have already produced a broad array of hydraulic products that have been used for all manner or purposes across most industries.
Hydraulic power is still something that amazes us. When it comes to transmitting power, hydraulics offer the densest method of it. In the past, we’ve even developed a bespoke hydraulic power unit to flush out gearboxes in the pit garages of F1. You may not know it but next time you watch a movie and you see a full sized ship with rocking hulls on it, it could be one of our products that is creating that rock.
We enjoy solving hydraulic power challenges. If you have one and you don’t know quite how to solve it, contact us today and we’ll work with you to find a solution.
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.
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.
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.
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
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