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Although the last winter was wetter than it was cold, hydraulic machines are still likely to have been at risk from the effects of cold. Fortunately most hydraulic parts are manufactured in either steel or iron, which are not seriously affected by temperature. However, what can be affected is fluid; it can turn into a consistency like ketchup.
Another concern in cold weather is the impact that the cold can have on seal material. Very cold and the seal material may become brittle. However, most seal manufacturers take this into consideration and develop their solutions for use in Arctic conditions. Even if the seal is not affected by cold weather, the fluid thickness can still be a challenge.
Hydraulic fluids are vulnerable to changes in viscosity based on temperature. This is particularly true if a machine has been sitting in the cold. Thick oil is hard to pump and if the distance for it to travel is far, then it can leave limited energy for work once that has been expended on pumping.
The solution to cold weather viscosity problems is to choose appropriate hydraulic fluid. Fluid that is labelled with ’22 weight’ oil may help. However, remember that this setting was registered in 40° not at -10°. So what should the rating be for minus ten?
The viscosity index (VI) is a measurement to describe the resistance to a change in viscosity when faced with a change in temperature. The higher the number the better as it will be more resistant to change.
Viscosity index is something that should be considered when using hydraulic oil. You want an all-weather operation without much downtime. Not being able to run machines due to weather can cost you much in financial matters, and spending out a little more for suitable hydraulic fluid will save you in the long term.
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 hydraulic power pack 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 in hydraulic power packs.
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 .
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.
Every hydraulic motor requires a power source to operate it. This is where hydraulic power units come into play. Here at Hydraproducts, we manufacture a range of hydraulic power units, but we call them hydraulic power packs.
Most of our clients who purchase hydraulic power units will use them on one of these types of applications:
Our units are compact and we can also make them bespoke for your situation if need be. Our units are manufactured with pumps, filters, relief valves, reservoirs, sight gauges and more so that you can rely on your unit to deliver continual power to your equipment. They are used for a number of different purposes including pressurizing lube systems, providing pilot flow to servo valves and of course, powering hydraulic motors and cylinders.
Hydraulic units are offered with options. Your application may require either a single or a bi-directional rotation.
There are benefits of using a hydraulic power unit, whether it’s a micro sized one or a standard one. It will usually be quieter than some solutions in addition to making it possible to eliminate a potential leak point. In these modern times, there are improved diagnostics and our products are created to protect against system shock.
Hydraulic Power Units For Every Application
A hydraulic power unit will often be at the core of a broad variety of system. They may be used on:
· Scissor lifts
· Tipping trucks
· Plant trailers
· Access control and security equipment
Our hydraulic power packs are available in the following sizes:
· Micro power packs
· Mini power packs
· Standard power pack
Our micro hydraulic power units are perfect for applications that require hydraulic power, but that are limited when it comes to available space.
If you need any assistance making your choice, give us a call and we’ll guide you in the right direction.
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.
The hydraulic power unit (HPU) is used in a number of different applications. It can provide access to fluid power in a mobile or static environment.
The HPU comprises of several components that work together to produce and utilise hydraulic energy. Most often you will find:
· Cylinders that will perform the conversion of hydraulic power to either rotary mechanical or linear power.
· A pump to convert mechanical power into hydraulic power
· Reservoir. The storage of fluid.
· Valves. These enable the amount, pressure and direction of the fluid.
· Filters. Maintenance of the fluid to keep it in performing condition.
· Fittings, tubes and hoses.
Every user of a hydraulic power unit can be assured of:
· Cost efficiency
· Durable reliability
· Effective transition of power
· A design that enables use with a broad range of different applications with small dimensions.
Applications include cranes, loaders, backhoes, amusement rides, car lifting devices, compactors for rubbish collectors and more. Hydraulic power packs are even used as part of the Jaws of Life tools that accident rescue workers are equipped with for use in road and other emergencies.
Other mobile applications include diggers, graders, fork lift road maintenance vehicles, agricultural machinery and excavators. You may also find them in industrial use such as assembly equipment, food processing machinery, tools, mining and steel works. Other industries that make use of HPUs include civil engineering, theatres, aerospace, and medicine, marine and automotive.
Where else are hydraulic power systems used?
You may have heard your mechanic tell you that he has to bleed the brakes. This is because the brakes on many cars use the hydraulic power system to power the brakes. Bleeding the brakes will result in the removal of air bubbles from the brake lines.
Just as with larger hydraulic systems, air in the system will prevent the piston(s) from operating properly. In the case of your brakes, it could stop them from working when you need them most. It’s also important not to have a leak in the hose as the pressure will not be enough to be able to slow down your car.
The fluid used in a hydraulic power pack is typically made up of a blend of petroleum oil, water and glycol. The type of oil used will depend on what type of application it is being used for. Filters are used to clean dirt, contaminants and foreign particles from the fluid. Excess fluid is stored in a reservoir that can separate the air from it. It’s this cleaning process that enables the machine to perform efficiently. All hoses, tubes and other components need to be able to withstand the pressure within the system.
10 Applications for Hydraulic Power Units
Hydraulic power units are used in many industries. They provide the power behind a well run hydraulic system and can be found in the most surprising of places.
With a motor, a hydraulic pump and a reservoir, it’s surprising what can be achieved.
You can expect to find hydraulic systems used in the following:
· Meat processing machinery
· Mobile construction and road work equipment
· Test equipment in the aerospace industry
· Material handling in road engineering, construction and mining
· Agricultural equipment
· Military and government operations both nationally and abroad
· Oil field and oil clean up equipment
· Theatrical and television production equipment
· Medical equipment
· Industrial processing equipment
Wherever heavy and systematic lifting is required, hydraulic power can be used. Hydraulics are ideal for the repeated use of powerful and/or directional force.
Hydraulic units are at work in the most everyday of things. For example, you may drive past a construction site and if you see a bulldozer, digger or dumper you will see hydraulics at work.
Fishermen use hydraulics to lift their pots and nets from the sea. Even a car mechanic uses hydraulics to change a tyre and to lift the car in order to make repairs to it. The brakes of a car uses hydraulics in order to stop. They have now become such an integrated part of our society that we don’t even notice how much we rely on them to keep our world running smoothly!
Hydraulics have been used since ancient times in Egypt and China around the year 6000BC. They were further refined by the Greeks and have been used for many different solutions including aqua ducts and water towers.
To find out more about how you can use hydraulic power packs for in your industry contact our sales team.
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