Hydraulic oil station: making it yourself

General technical characteristics:

• Pump displacement – ​​2.09 cm3
• Nominal pressure – 18 MPa
• Nominal flow – 3 l/min
• Oil tank volume – 20 l
• Drive motor power – 1.1 kW, 1500 rpm.
• Power supply – three-phase current, voltage 380 V, 50 Hz
• Weight (with dry tank) – 22 kg
• Dimensions – 450x370x410 mm

The configuration, physical dimensions, pressure and flow values ​​can be changed at the request of the customer. All hydraulic pumping stations undergo mandatory inspection and testing

Will need

• Garden hose – 10-20 meters.
• Adapter from hose to 1/2 inch thread.
• Ball valve.
• Turbine, ordered from AliExpress – https://ali.pub/3v6u7f.

This hydraulic turbine generates voltage in the range of 12-22 V and produces power in the region of 10-20 W.

Purpose of the oil station

Hydraulic oil station with electric drive type NEE18-3I20T1 is designed to create hydraulic energy and use it in a bench installation to test the functioning of steering racks. The oil station is made in climatic version “U” of placement categories 2, 3 according to GOST 15150-69. Ambient temperature from plus 5°C to plus 40°C. Working fluid: VMGZ TU 38 101479-86, MGE-10A OST 38 01281-82. The cleanliness class of the working fluid must be at least class 10 according to GOST 17216-71. The temperature of the working fluid during operation of the pumping unit should be in the range from plus 5°C to plus 50°C. The operating position of the pumping unit is horizontal. Tilt up to 5° in any direction is allowed.

Description of the hydraulic circuit:

The electric motor (M) rotates the pump (H). The working fluid is sucked by the pump from the tank (B) through a mesh filter (F1), a high-pressure hose is supplied to the working cavity of the product. The maximum pressure of the oil station is adjusted using a safety valve (KV). The maximum operating pressure of the oil station is 18 MPa. The hydraulic distributor (P) is designed to control the flow of hydraulic fluid. The hydraulic valve spool positions are switched by an electromagnet from the control box (working position “A” and idling “B”). Return to the neutral position (“0”) is carried out due to the action of an elastic element (spring). The pressure in the system is controlled by a pressure gauge (MN) (0.40 MPa). An oil filter (F2) is installed on the drain line. The pressure difference of the working fluid before and after the filters should not exceed 0.5 MPa. A pressure drop above the permissible level leads to their failure. The working fluid is poured into the tank through a filler strainer (FZ). The liquid level in the tank and its temperature are respectively controlled using a level gauge (U).

Oil station equipment

1. 1) Tank
2. 2) Cover
3. 4) Gear pump
4. 5) Electric motor
5. 6) Coupling with elastic element
6. 7) Glass
7. Four-line three-position hydraulic valve with electromagnetic control
8. 9) Hydroblock

1. 11) Safety valve
2. 13) Pressure gauge
3. 14) Pressure gauge stand
4. 15) Filler neck with strainer and breather
5. 21) Suction filter
6. 22) Drain filter
7. 23) Oil level indicator combined with a thermometer
8. 24) Cork

Force created by hydraulic cylinders of different diameters and extension time

Design and principle of operation of the oil station

The hydraulic oil station NEE18-3I20T1 consists of a tank 1 equipped with a cover 2; pump group, consisting of a pump 4 (gear), an electric motor 5, connecting their coupling shafts with an elastic element 6 and a glass 7, which acts as a shell, a four-line three-position hydraulic valve with electromagnetic control 8 mounted on a hydraulic unit 9, a safety valve 11, a pressure gauge 13 , installed on the rack 14, filler neck 15 with a strainer and breather; suction filters 21 and drain 22; oil level indicator combined with a thermometer 23. Oil from the tank is drained through plug 24. Oil from tank 1 is pumped by pump 4, driven by engine 5 through coupling 6, through suction filter 21 and pipeline and then enters hydraulic distributor 8, which supplies oil to pressure to the working parts. From the hydraulic distributor, oil flows to the drain through a pipeline to drain filter 22 and again enters tank 1. Oil is poured into tank 1 through filler neck 15. Oil is drained through plug 24 installed in the wall of tank 1. The oil level is monitored using indicator 23. The maximum pressure developed by the oil station is adjusted by safety valve 11. The pressure setting in the system is controlled by pressure gauge 13.

This is not a public offer. All information provided is for reference only. Specifications, specifications and physical dimensions are subject to change without notice.

Related Posts

Please advise a hydraulic station for synchronous operation of hydraulic cylinders.

• Author: Daniil Gordienko
• February 15, 2022 1 comment

A hydraulic station is needed for the synchronous operation of hydraulic cylinders. Please advise what and how to choose?

Why does the hydraulic station not produce the required pressure, what should I do?

• Author: Kirill Erlikh
• February 15, 2022 1 comment

The hydraulic unit does not produce pressure, what should I do?

Questionnaire for ordering a hydraulic station: what parameters do you need to know to order and manufacture a hydraulic station?

• Author: Sergey Mikhailov
• February 15, 2022 1 comment

Design and principle of operation of an oil station for a press

What is a hydraulic press

The Latin word pressus means “pressure” - and it has widely entered our lives precisely in its immediate meaning. And the “press” - printed matter produced by pressing a colored form onto paper, and the abdominals - a group of muscles that press on the internal organs, and the pressing machine - all these terms are the heritage of the ancient Romans.

In technology, a press is a device designed to apply pressure to any external object. If the force for this external pressure is generated by the pressure of the working fluid inside the device itself, the press is called hydraulic (another legacy of the ancestors, this time the ancient Greeks: “gidor” - water, “avlos” - tube).

Making a hydraulic press with your own hands

The hydraulic press has become widespread. This device is used in many auto repair shops for pressing and unpressing bearings, various gears and shafts. In a home workshop, a manual hydraulic press, made by hand, is very often used, since installations made in industrial conditions have a high cost.

A self-made hydraulic press can be used in workshops to stamp parts made of metal, plastic and rubber. A hydraulic press can be used to press in rubber bushings on the ends of automobile shock absorbers in a home workshop.

If you have skills in working with equipment and access to milling, drilling and turning equipment for your home, you can design a hydraulic manual press (HH), which is capable of developing a maximum force of up to 35 tons per 50 sq. m. see. It’s not difficult to make a hydraulic tabletop press with your own hands, and you can save a significant amount of family budget money.

Comments

How many kilograms does such a pump produce?

the starter has a maximum of 200 rpm and the pump has 2600 - I wonder HOW it works

Directly, the starter power is not enough, the pump will not produce full power

It is not clear what the alignment of the starter armature can be with a splined connection? if the anchor is on bushings.

You can pump water with this thing

relevant for converting a gazelle into a dump truck

Hello! What is the purpose of this system?

and on the tractor the pump has an adapter plate with bearings, won’t it break the NS?

Great idea ! Let's wait for the continuation!

Operating principle and design features of the device

You can construct a hydraulic press in a home workshop using available rolled metal. The main working element of any hydraulic press is a car hydraulic jack. Most often, the press uses a common design for a car jack - a bottle jack. Jacks of this type, depending on the design features, can lift from 2 to 100 tons. A huge advantage of a car hydraulic jack is the simplicity of its design and ease of use.

The operation of the jack is based on the basic laws of hydrodynamics, in particular Pascal's law, which states that the fluid pressure that occurs in a closed hydraulic system is transmitted equally in any direction. When combining 2 containers of different volumes into a single system and applying pressure in a smaller container, the same pressure applies to the liquid in the larger container, and the force that is applied in the small container of the system, transmitted to the liquid in the larger container, increases by so much the same time as the diameter of the smaller vessel differs from the larger one.

Depending on the technical purpose, the hydraulic press can be made in both table and floor versions. The tabletop version is more compact, while the floor-standing design requires additional space to accommodate. The production of one or another modification depends on the specific tasks for which the device is being manufactured.

1ou › Blog › Miniature hydraulic station (pump) - beginning

Good afternoon, Kulibins!

Hydraulics is the main “force” of modern mechanical engineering and is used everywhere: from the simplest technological equipment, metal-cutting machines, road construction equipment to aviation and astronautics. A hydraulic cylinder can be bought for 3-15 tr. for various applications: for a firewood splitter, for a small hydraulic press, for a hydraulic vice, for hydraulic body straightening devices, for a car lift, for a gate drive, and so on... I need this for a homemade hydraulic lift - www.drive2.ru/b/ 497889377578385827/ It all works according to the simplest laws of physics: P = F / S (Pascal’s Law); Accordingly, you need a hydraulic oil station, which combines an engine, a hydraulic pump, a tank with working fluid and hydraulic valves.

But miniature and cheap hydraulic (oil) stations are not produced from domestic components. The typical price in Russia for a low-power hydraulic station starts from

25 - 30 thousand rubles. You can order on Chinese websites and wait for an unknown Chinese craft that will go through the entire cycle of production, shipment, delivery, and customs only if you really need a whole batch of products and have experience working with Chinese sites like Alibaba. It’s easier with European products, but I have neither the money, nor the experience, nor the desire to order foreign products. This is what the finished mini station looks like:

Gear pumps are produced in Russia and the price tag for an NSh 10 type pump ranges from 800 to 1500 rubles. AIR electric motors are also produced and are affordable. Thus, all that remains is to make a project and connect it all into a single structure, resulting in a homemade miniature hydraulic station. Now I’m actively engaged in design, because without a project I’ve already scrapped a lot of metal and wasted a lot of time.

UPDATE 2022 - there is an addition to the entry regarding the type of engine and pump below

The assembly is planned to include: Electric motor AIR 100 S4 (flange), 3 kW - 7500 rub.

There is also a power steering check valve KK-1 UYAISH.306577.010 on sale - 1500 rubles, which should be suitable for the NSh10 pump

How to make hydraulics for a mini-tractor with your own hands?

Hydraulics is a technical system that operates through the influence of fluid pressure on other elements of the system. During the impact process, kinetic energy is generated, which is converted into mechanical energy, as a result of which the useful work of a particular mechanism is performed. Various agricultural units, such as mini-tractors, are equipped with a hydraulic system. It is used to control various attachments.

This system is present in the design of any tractor produced by the manufacturer. It can be modified and optimized to suit your needs. A homemade mini-tractor must be equipped with hydraulics, which will allow you to use the equipment with maximum efficiency.

Brief theoretical part

Hydrogen, also known as hydrogen, the first element of the periodic table, is the lightest gaseous substance with high chemical activity. During oxidation (that is, combustion), it releases a huge amount of heat, forming ordinary water. Let us characterize the properties of the element, formatting them in the form of theses:

1. The combustion of hydrogen is an environmentally friendly process; no harmful substances are released.

2. Due to chemical activity, the gas does not occur in free form on Earth. But its reserves in water are inexhaustible.
3. The element is extracted in industrial production by a chemical method, for example, in the process of gasification (pyrolysis) of coal. Often a by-product.
4. Another way to produce hydrogen gas is by electrolysis of water in the presence of catalysts - platinum and other expensive alloys.
5. A simple mixture of hydrogen + oxygen gases explodes from the slightest spark, instantly releasing a large amount of energy.

For reference. Scientists who first separated the water molecule into hydrogen and oxygen called the mixture an explosive gas due to its tendency to explode. Subsequently, it received the name Brown's gas (after the name of the inventor) and began to be designated by the hypothetical formula NHO.

Previously, airship cylinders were filled with hydrogen, which often exploded

From the above, the following conclusion suggests itself: 2 hydrogen atoms easily combine with 1 oxygen atom, but they part very reluctantly. The chemical oxidation reaction proceeds with the direct release of thermal energy in accordance with the formula:

2H2 + O2 → 2H2O + Q (energy)

Here lies an important point that will be useful to us in further debriefing: hydrogen reacts spontaneously from combustion, and heat is released directly. To split a water molecule, energy will have to be expended:

2H2O → 2H2 + O2 – Q

This is the formula for an electrolytic reaction that characterizes the process of splitting water by supplying electricity. How to implement this in practice and make a hydrogen generator with your own hands, we will consider further.

Design features

Hydraulics on a mini-tractor work on the same principle as all other similar systems. It contains a hydraulic pump that builds up pressure in the system and forces fluid to move through it. It is connected to a source of filler, which is an expansion tank. This unit is driven by transmitting torque from a diesel engine through a belt or mechanical connection to a shaft or transmission.

Although the system is called hydraulic, it is filled with oil. It has a lower boiling point, a suitable expansion coefficient and serves as a lubricant for the moving parts of the mechanism.

Flexible hoses with reinforced walls are used to transfer fluid through the system. All their connections are sealed and reinforced. Through them, under the influence of pressure, the oil enters the hydraulic distributor with a floating position, and then into the hydraulic cylinders, which act as pistons. The pistons perform mechanical work, which drives the corresponding attachments.

Some modifications of hydraulic mechanisms require integration into the wheel hydraulic drive system. This installation complements the tractor's braking system, which makes it easier to use the brakes, especially in homemade agricultural equipment. The hydraulic linkage can also be used to facilitate steering, acting in this case as a hydraulic booster. These design features of the mini-tractor’s hydraulic system allow you to control the operation of all mounted mechanisms, the vehicle’s own components, and effectively perform assigned tasks.

In order to assemble the hydraulics for a mini-tractor with your own hands, you will need the components of the mechanism produced at the factory using special equipment:

• hydraulic pump;
• hydraulic distributor;
• hose fastenings;
• hydraulic cylinder;
• other components that cannot be made at home.

The listed elements can be purchased in a store as a complete set or dismantled from old specialized equipment, while the rest of the fastening structure can be designed and assembled with your own hands.

Necessary tools

Each specific case may require its own set of tools and materials required for assembly. Their main set:

• welding machine;
• Bulgarian;
• drill;
• drill;
• taps for thread cutting;
• set of wrenches.

The list can be supplemented with items depending on the assembly conditions.

Required parts:

• hydraulic pump;
• hydraulic distributor;
• hydraulic tank;
• transmission belt;
• hoses and their fastenings;
• hydraulic cylinders;
• bolts and nuts;
• clamps;
• oil filter;
• various fasteners, the name of which is determined by each specific case.

The main components are shown in the photo.

How to do it?

Work on creating your own hydraulic system for a mini-tractor begins with designing a future design and carrying out calculations aimed at optimizing the ratio of expended resources and efficiency. The power of the tractor must correspond to its intended purpose, and the technical characteristics of the hydraulic system components are proportional to the loads applied to them.

Insufficient power of the oil pump or low load capacity on the hydraulic cylinders can lead to rapid failure of the entire system or individual components. An overestimated level of these indicators will increase the consumption of fuel and other resources and create an imbalance in the system. To compensate for the difference in technical characteristics and equalize the balance, additional items are installed: a second pump, a hydraulic cylinder, and others.

The drawing must reflect the design of the supporting frame, which will include space for the pump, distributor, pistons and other additional elements, as well as a hydraulic circuit connection diagram. At the same time, its configuration must be optimized in such a way that the distance from the engine output shaft to the nearest hydraulic system force transmission point is minimal.

The pump is installed as close as possible to the drive shaft. The reservoir with working oil is located above it, which ensures a free supply of liquid to the pump blades and reduces the leakage rate of useful mechanical energy. A filter is installed between the liquid reservoir and the pump. Its presence prolongs the uninterrupted operation of the entire system.

By means of reinforced hoses, the pump is connected to a hydraulic distributor, which is equipped with control elements. There may be several of them depending on the functionality of the hydraulics. Since in order to maintain pressure in the system, oil must continuously circulate through it, the distributor regulates the direction of its movement and supply to the cylinders, and also cuts off the flow during idle operation. The distributor controls are special levers supplied by the manufacturer with it.

After mounting the distributor, hydraulic cylinders are installed on the working part of the frame. These elements can be represented by special piston blocks designed for use in a hydraulic system. In other cases, they can be made independently from oil-type automobile shock absorbers.

Attachments are installed on the tractor in conjunction with hydraulic cylinders - moving parts of the system that transmit mechanical force to it. The design of fastening mechanisms is determined by the type of equipment, its actual configuration and the nature of the target work performed with its help.

The assembled hydraulic system must be equipped with technical components and insulation means that require their mandatory installation. Among them are:

• drain unit in the hydraulic tank;
• pressure relief valve in the tank;
• pressure meter;
• shut-off valve;
• draining the pump and hydraulic distributor;
• fine filter elements at the inlet to hydraulic cylinders;
• O-rings, washers, gaskets, nuts, clamps.

Before starting work, the entire system is configured.

The working diagram of hydraulic equipment for a mini-tractor is shown in the diagram:

Communities › Homemade Garage Hi-End › Blog › Hydroelectric station

As they say, “due to business needs,” a need arose in production for a hydraulic station from which various hydraulic tools could be powered: hydraulic cylinders, presses, sheet benders, hydraulic motors, etc.
In general, this project has been brewing for a very long time, the first parts for it were purchased two years ago, but since there was no urgent need for such a device, the project remained in a dormant state. However, its time has come... This is one of the few projects that we built without any preliminary drawings. As they say, in place and from scraps. To be honest, this is hell (although almost everyone I know works this way). On the one hand, it seems like progress is immediately visible, but you also have to redo it 100,500 times, because you don’t foresee one thing, then you forget another... But you can feel like an Artist.

The engine was 2.2 kW at 1400 rpm (AIR90L4). The use of NSh type pumps was immediately abandoned due to the unclear situation with their quality and the real chances of running into outright defects. Instead of the NSh, we used a Taiwanese pump RG P2 with a displacement of 4 cm3, delivering a pressure of 250 bar (which is 1.5 times more than that of the NSh). The pump was connected to the engine through an adapter bell and a coupling with a polyurethane insert, fortunately all this stuff is standard, easy to buy and does not require any manipulations like “cut a piece from one part and weld it to another,” as happens with NSh.

Under the engine, we welded a mighty frame from 80x40 channel bars, the remains of which were gathering dust lonelyly in the corner. Cutting sheets 2mm thick were used on the tank.

We assembled everything first on oven mitts. Firstly, it’s easier to redo everything when something goes wrong (and I had to redo it often). Secondly, this is a way to force yourself to paint the product before using it. Usually, when everything is already assembled, there is no desire to disassemble everything and paint it, so half of the devices in our workshop can serve as sets for a film about a post-apocalyptic future. And when assembling on tacks, everything will have to be disassembled for welding, and at the same time painted.

We figured out a panel for installing the hydraulic distributor. We only had a single-section one in stock, but in the future there are thoughts of putting a distributor into 3 sections in order to get 6 working circuits and be able to connect up to 3 consumers to one station (one day this will definitely be needed).

Next, we installed the main filter and found a place for the starter to the engine. At first, they thought of placing the ports for connecting hoses next to the distributor, but then it became clear that this was not a very good idea, and in the final version everything moved down to the wheels

We put the device on wheels and began to figure out how to connect the hoses. This is where all the shortcomings of the “artistic” approach came out. Hydraulic hoses are quite rigid, so it is not always possible to connect them as originally intended. After some torment and alterations of the hoses, everything was connected like this.

Literally it immediately became clear that this was not a very successful configuration, and the BRS was moved downstairs. Otherwise, almost a meter of hoses of the connected tool would be “eaten up” due to the fact that the connection point is too high above the ground. The configuration was revised, and the BRS moved downstairs.

Then everything was disassembled, scalded, sent for painting and we suffered for two whole days waiting. Finally it's time for the final assembly.

Instructions for controlling the hydraulics of a mini-tractor

The system is controlled using a lever(s) in conjunction with a hydraulic distributor. Its (their) main function is to change the positions of the distributor control valves, supply pressure to the desired section, and disconnect the fluid circulation circuit from the final units of the unit.

A simple hydraulic system has three control lever positions:

• neutral - oil circulates separately from the pistons;
• expansion of the piston - pressure forces it to take the most extended position;
• movement of the piston - the pressure is released, the vacuum created by the escaping liquid pulls it along with it, returning it to its original position.

At the moment the piston(s) move, the attachment performs the work intended for the purpose of its production.

Any hydraulic system is equipped with mechanisms for starting and stopping the hydraulic pump, fixing positions and emergency (manual) control.