Energy-saving, efficient and low-noise press hydraulic system

Abstract

The invention relates to an energy-saving, efficient and low-noise press hydraulic system. The system comprises an oil tank, a first oil suction filter, a first direct-acting overflow valve, a first pressure sensor, a three-position four-way electro-hydraulic reversing valve, a first one-way valve, a first two-position two-way electromagnetic ball valve, an external control one-way balance valve, a first throttling hole, a movable plate driving long-stroke hydraulic cylinder, a movable plate driving hydraulic cylinder, a second one-way valve, a first pressure gauge, an internal gear pump, an AC servo motor and a first coupling, a second pressure sensor, a second throttling hole, a second two-position two-way electromagnetic ball valve, a second oil suction filter, a three-phase asynchronous motor, a second coupler, a constant-pressure variable plunger pump, a second pressure gauge, an electromagnetic overflow valve, a third one-way valve, a three-position four-way electromagnetic reversing valve, a double one-way throttling valve, a two-way hydraulic lock, a second direct-acting overflow valve and a short-stroke pressurizing hydraulic cylinder. According to the system, the manufacturing difficulty is effectively reduced, the manufacturing cost is greatly reduced, the efficiency is high, the heat is little, and the noise is low.

Description

Technical field [0001] The present invention belongs to the field of hydraulic transmission and control, and involves a pressurized hydraulic system, especially a pressurized hydraulic system for energy saving and low noise. Background technique [0002] At present, hydraulic technology is widely used in various fields of the national economy, such as aviation, aerospace, ship, transportation, mechanical manufacturing, etc., and hydraulic components have achieved standardization, seriesization and generalization, greatly facilitating people's choices. [0003] The press is typically composed of a top and lower plate, an intermediate plate and a guide post. Because the press requires a larger output force, the up and down drive of the movable plate is generally realized by the hydraulic system. [0004] Traditional pressure machine hydraulic system, because high working pressure is usually used to do power sources with a plunger pump. The plunger pump is relatively large when the ...

AI Technical Summary

Problems solved by technology

The plunger pump is noisy when it works at high pressure

The up and down movement of the moving plate is generally divided into two speeds: fast and slow. If a quantitative plunger pump is used, a large amount of hydraulic oil will return to the oil tank through the overflow valve during slow movement, and the system efficiency will be low and heat will be high; if a variable displacement plunger pump is used , high cost

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