Hydraulic cylinder for greenhouses

Cultivation of crops in the heifer gives many advantages to the summer owner, saving him from a lot of hassle. Heat-loving plants are shielded from the harmful effects of the environment, developing under optimal conditions. Designs and materials for modern greenhouses create the most comfortable moisture and temperature conditions for growth, but complete provision of a supportive environment is impossible without airing. Solve this issue help hydraulic cylinders for the greenhouses, which operate in automatic mode and regardless of the person. The presence of such a device makes the operation of the dacha construction convenient and effective from the point of view of obtaining a worthy eco-friendly harvest.

The principle of the hydraulic cylinder

A classic example of a greenhouse hydraulic cylinder is a factory automatic system that provides ventilation inside the structure. The work of this device is based on the movement of the piston, which is activated as a result of the expansion of the liquid in the cylinder under the action of solar heat. In the process of lowering the temperature, the hydraulic cylinder closes the window for greenhouses, since the liquid assumes an initial state with a smaller volume. Such devices are universal, but they will have to be paid for.

In addition, there are non-standard designs of greenhouses, for which automatic machines with special characteristics are needed. For example, if you need to ensure the lifting of a massive pane in the greenhouse, then you need a more powerful hydraulic cylinder for greenhouses, which you can do better with your own hands. When designing such devices, you can also make various additions. In particular, the glued foil increases the heating speed of the device, which speeds up the process of opening the window. Conversely, if you turn the element sensitive to the sun by the reverse side (without foil), then it takes more time to achieve the moment of system activation.

What should a hydraulic cylinder be made from?

For this purpose, usually use a pneumatic shock absorber from the car, which is installed on the hood or tailgate. Special requirements for the technical state of the mechanism are not presented - the main thing is that there is pressure in it. This can be checked on the operating rod. Even the hydraulic cylinder for the greenhouse from the shock absorber from the old car is able to work for several years, which is a good result, given the intensity of operation.

At the end of the cylinder, the ball must be cut so that the length of the holder remains as much as possible. Then the cylinder is clamped by means of a vice, but it needs to be done through the ends, so that the working element itself is not damaged. In a firmly fixed cylinder, a 3 mm hole is made by the drill. At the time of formation of the hole in the hemp under the influence of pressure, air will start to escape. A small "pshik" is possible and the risk of getting chips in the eyes is not excluded - in this case it is necessary to initially prepare glasses or a mask. After cutting the thread in the hemp, the hydraulic cylinder for the greenhouses will be ready. Then on the stump the thread is formed. Apparently, all operations are carried out exclusively with the external surfaces of the shock absorber, so there is no need to penetrate into its internal device.

Hydraulic cylinder tank

In the hydraulic cylinder, it is necessary to provide for the presence of a fluid reservoir. This part is also recommended to be made from automotive parts. In this case - from the cardan, which is cut off the so-called ears. Cutting should be done strictly according to the calculated length for a particular greenhouse, then brew the butt. The other end produces two holes. The first will serve for the connection, and the second for providing a comfortable air release. The most difficult stage, on which the hydraulic cylinder for the greenhouse is made of a shock absorber, is thread cutting. And it is not the very gravity of this procedure that is important, but the responsibility - any violation in symmetry can make the part unfit for further use. The parameters for the calculation are as follows: the length is 80 cm and the diameter is 7 cm. The cumulative volume reaches 3 liters. If a larger tank is used, it is desirable to fill the excess space with metal parts.

Connecting hose and spring

A car brake hose can be used as the connecting element of the system. Again, there are no special requirements for it - it is important that the thread converges. Depending on the characteristics of the hose, the corresponding thread on the tank and cylinder is cut. Optimal parameters - height of 1 cm in steps of approximately 1.25 cm. Self-made hydraulic cylinders for ventilation of greenhouses of shock absorbers are able to withstand a load of 100 kg. This is enough not only for maintenance of the window, but also for the entire construction of the greenhouse. The only problem is that the independent return of the rod to its original position is impossible - the system sucks air through the seals. Therefore, a spring is needed, especially if the transom is not of sufficient weight.

The spring must cope with a weight of at least 5 kg, so that the rod is back pressure. Since the balance of the transom is adjustable by mass, a standard door spring can be used. With its help, it is possible to service several sections with parameters of 1x2 m. To simplify the design, the ventilation pans are combined into a single system, the work of which will be provided by a hydraulic cylinder for a greenhouse with sufficient traction. The wings themselves are desirable to be designed so that ventilation is carried out from the top, since hot air is collected from this side.

What kind of liquid to use?

Any liquid is suitable for the hydraulic cylinder, but the best option is oil. Many mistakenly believe that ether or alcohol increases the efficiency of the mechanism, but in fact it is not. It is quite enough ordinary automotive oil, including working off the engine. The simplest hydraulic cylinder for the greenhouse with their own hands can be filled with a washing composition. If you do not have a suitable liquid at hand and you have to go to the store, then oil products such as M8 are suitable for both price and performance.

Hydraulic cylinder assembly

When all the elements are ready individually, you can proceed with the assembly. First of all, using a syringe, liquid is poured into the shock absorber. You can also use a funnel, adding oil to the brim. After that, you need to let the bubbles out with the air out - this will happen within a few hours. Then the hydraulic cylinder for the greenhouse is connected to the hose by twisting. The rod is pushed so that the oil exits the hose and releases air. From the point of view of constructional expediency, air should not remain in the device, however it is better not to leave the system completely without bubbles, otherwise there is a risk of rupture of the cylinder. The air will function as a damper and shrink as the rod extends.

Installation of hydraulic cylinder

In the installation there is nothing complicated, but the process itself is individual. Much will depend on the number and parameters of the windows, as well as on the structure itself. If the hydraulic cylinder for the greenhouse with their own hands was made strictly to the size of a specific window for ventilation, there will be no problems. The main thing is to find the reference point and from it open the frames for the hydraulic cylinder. The tank itself must have direct access to the sun, otherwise the mechanism will not work.

Setting the hydraulic cylinder

For optimal adjustment, the device must be taken to the place of operation, wait for the heating of the tank under the sun and release excess oil. Thus, the hydraulic cylinder for greenhouses is corrected for use in a structure with leaflets of a certain mass. It is not possible to calculate the load in advance, so the adjustment is already made in practice after the use. If the pressure is not enough, the air is discharged and the liquid again replenishes, and if it is sufficient above the norm, then, on the contrary, the oil is drained.