Milking machine: oil or dry?

Milking machine: oil or dry?

Which milking machine is better: oil or dry, you will find out by reading this article

Features of the design of oil pumps:

Oil (full-fledged), or closed design pumps:

Original, completely domestic design, which has proven itself as a perfect mechanism. The first pumps of this design were designed and launched in the Soviet Union in the 1970s. That is, the reliability really meets GOST. The design turned out to be so successful that today it is produced almost unchanged.

Oil milking machine 

A full-fledged design of a vacuum pump provides for the presence of front and rear pump covers.

There are seats on the front and rear pump covers in which bearings are installed.

The rotor shaft rotates on the bearings that are installed in the front and rear pump covers. You probably already understood that thanks to this rotor, which rotates on bearings, the vacuum pump is classified as a rotary pump.

Regardless of the performance indicators or type of vacuum pump (it does not matter whether dry or oil), a full-fledged closed-type pump always has four plates. Never install two plates!

Oil is supplied directly to the bearings on which the rotor of the vacuum pump rotates, and the plates that are installed in it. 

In fact, such a pump, thanks to the system of direct oil supply to the bearings, can work an unlimited amount of time without stopping. Which is not provided by an oil pump with a drip lubrication system. A drip lubrication system is typical for oil pumps of an open (incomplete) design.

Oil (incomplete, simplified), or open design pumps:

Domestic analogue, a copy of a pump of Turkish origin. Developed on the basis of a dry pump of an open (incomplete) design. Due to the simplification of the design and the exclusion of more than half of the parts from its composition, the cost of production is significantly reduced. Simplifying the design saves the manufacturer money, but this is offset by a decrease in reliability and an increase in the cost of future maintenance. In turn, maintenance is carried out at the expense of the end consumer. That is, at your expense.

One of the criteria for the inferiority of an open-type pump is the absence of one of the vacuum pump covers. The pump does not have a cover on the side where it is directed to the electric motor. Therefore, the electric motor flange itself, from which the electric motor shaft follows, acts as the vacuum pump cover. 

On the front cover of the pump, which is present (!), there is no seat where the bearing is installed. The absence of a seat in the cover is due to the absence of bearings in the pump as a whole. The front cover of the pump is needed only to prevent the plates from flying out of the rotor during operation. 

The rotor of the vacuum pump is installed directly on the electric motor shaft. 

Open (incomplete) design oil vacuum pumps, as a rule, provide for the installation of only two plates. There are almost no open-type oil pumps with four plates on the territory of Ukraine.

A drip oil system is typical only for incomplete open-type pumps. Such a lubrication system provides for the supply of oil only to the pump plates. It is impossible and unnecessary to supply oil to the electric motor bearings, and there are no bearings in the pump itself.

Dry (full-fledged), or closed-type pumps:

Designed during the years of independence in the late 90s in Kharkov. In the early 2000s, the production line was fully developed and adjusted. A dry pump of a full-fledged (closed) design was developed on the basis of a Soviet-style rotary oil pump. Therefore, the overall reliability indicators of the pump of this design are at a higher level compared to a dry (incomplete, simplified) or open design pump.

Dry milking machine 

A full-fledged design of a vacuum pump provides for the presence of front and rear pump covers.

There are seats on the front and rear pump covers where bearings are installed.

The rotor shaft rotates on the bearings that are installed in the front and rear pump covers.

Regardless of the performance indicators or type of vacuum pump (the same - dry or oil). A full-fledged closed design pump always has four plates. Two plates are never installed! 

Thanks to the bearings on which the vacuum pump rotor rotates and the pump covers in which these bearings are fixed, it was possible to achieve autonomy of the vacuum pump from the engine. Which, in turn, is characterized by a complete absence of load on the shaft and engine parts. A significant advantage of dry pumps of a full-fledged closed design is that the heat generated during operation of the vacuum pump is in no way transferred to the engine. 

Dry (incomplete, simplified), or open design pumps:

A copy of a Turkish-made pump. Due to the simplification of the design and the exclusion of more than half of the parts from its composition, it is possible to significantly reduce the cost of production. Simplifying the design saves the manufacturer's money, but this is offset by a decrease in reliability and an increase in the cost of future maintenance. In turn, maintenance is carried out at the expense of the end consumer. That is, at your expense. 

One of the criteria for the inferiority of an open design pump is the absence of one of the vacuum pump covers. The pump does not have a cover on the side where it is directed to the electric motor. Therefore, the electric motor flange itself, from which the electric motor shaft follows, acts as the vacuum pump cover. 

On the front cover of the pump, which is present (!), there is no seat where the bearing is installed. The absence of a seat in the cover is due to the absence of bearings in the pump as a whole. The front cover of the pump is only needed to prevent the plates from flying out of the rotor during operation. 

The rotor of the vacuum pump is installed directly on the electric motor shaft. 

Dry vacuum pumps of (incomplete) open design, as a rule, provide for the installation of only two plates. 

There are also models with four plates, but the number of plates does not solve the main problem of pumps of this design. Namely, we are talking about the unreliability of the design, which is characterized by overloads and overheating. This problem lies in the direct transmission of torque from the engine directly to the pump rotor. Manufacturers have deprived consumers of any opportunity to replace the engine or pump separately, since in the event of a breakdown of one of the units, the pump or engine is not sold separately. This design is too expensive to repair, which allows it to be classified as a disposable machine.

You can get advice or order a milking machine here.