History of Hydraulic Technology

Classification:

【Summary】On-site diagnosis requires that maintenance personnel have certain knowledge and practical experience of hydraulic transmission. Before diagnosing the failure of a new model, we must carefully read the random operation and maintenance instructions to have a basic understanding of the machine's hydraulic system. By reading the technical data, master the main parameters of the system; familiar with the schematic diagram of the system, master the functions and mutual relations of the symbols of the components in the system, and analyze the function of each branch circuit; the structure and working principle of each hydraulic component should also be Have an understanding; analyze the possible causes of a certain failure; compare the position of each hydraulic component with the machine and the connection between them. When specifically diagnosing a fault, you should follow the sequence of "outside to inside, first and then difficult", and investigate the possible causes of a certain fault one by one.

As early as 200 BC, humans began to use water power by means of water wheels. Before the steam engine entered practical use, the power used was water power in addition to muscle power and wind power.

About 1600 German Kepler invented the gear pump, but it was not used initially.

（Ryan gear pump, the displacment is from 0.16cc to 200cc, work pressure could reach 280bar. The application covers agriculture and construction machine.）

In 1663, the French Pascal proposed the principle of hydraulic presses. In 1795 the British Borama produced the first industrial hydraulic press. After the steam engine became practical, construction of a high-pressure water network that provided energy for driving hydraulic machinery began in Britain and France.

In the second half of the 19th century, the British Armstrong developed a lot of hydraulic machinery and components, mainly used in ship winches and hoists. In 1880, Austria only used hydraulic drilling rigs for the first time when tunneling the Alps. At that time, many parts were very similar to the current components.

By 1939, London ’s high-pressure water network had reached 300km, providing 7.5 million cubic meters of 5.5Mpa of pressure water for 8,000 hydraulic equipment each year. Knowing that in the 1970s, this network was also providing hydraulic energy for the elevators of the London Underground.

In 1905, it was found that mineral oil was more suitable as a pressure medium. As a result, it has been widely switched to oil in a short time.

Hydraulic technology was advanced more rapidly during the two world wars. By 1940, hydraulic pumps with a working pressure of 35Mpa had been produced in series.

Three original parts of hydraulic Machine

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Three original parts of hydraulic Machine

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