Automatic volume compensated synchronous flow distribution device

Abstract

An automatic volume compensated synchronous flow distribution device comprises a left cylinder barrel and a right cylinder barrel which are symmetrically connected into a whole. A piston rod is sleeved in the left cylinder barrel and the right cylinder barrel, a middle guide sleeve is arranged in the middle of the piston, a left piston and a right piston are arranged in the left cylinder barrel and the right cylinder barrel on two sides of the middle guide sleeve respectively, a left guide sleeve and a right guide sleeve are arranged at two ports of the left cylinder barrel and the right cylinder barrel respectively, and a left radial oil hole and a right radial oil hole are arranged on the walls of the left cylinder barrel and the right cylinder barrel respectively. The barrel wall between the two radial oil holes is provided with a compensation valve set which comprises a valve body, a high-pressure compensation valve and a low-pressure compensation valve. Equivalently, the automatic volume compensated synchronous flow distribution device is formed by mutually serially connecting two double-rod double-acting cylinders with same structures and sizes, and volume synchronization can be precisely realized. Whole-course automatic compensation can be realized by means of the compensation valve sets, and synchronous error accumulation caused by processing errors and internal leakage can be avoided while pressurizing cylinder effect is also avoided. The two cylinders share one piston rod, so that low no-load resistance, high synchronicity, high reliability and long service life of the synchronous cylinders can be guaranteed.

Description

technical field [0001] The invention relates to a synchronous device, in particular to an automatic compensating synchronous shunting hydraulic device suitable for ensuring the synchronous operation of double actuators. Background technique [0002] The double-cylinder driving method is widely used in various mechanical equipment. Due to load, internal friction, internal leakage, processing errors and other reasons, the two cylinders are not synchronously operated, resulting in torsional loads on the supported structure or low working efficiency of the driven mechanism. The occurrence of problems such as poor reliability, the use of synchronous oil cylinders to realize the synchronization of two cylinders is one of the synchronous driving methods that people often use. At present, there are two main ways to apply the synchronous oil cylinder. One is to connect an ordinary double-acting oil cylinder in series between the two working oil cylinders to achieve synchronization or...

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Problems solved by technology

At present, there are two main ways to apply the synchronous oil cylinder. One is to connect an ordinary double-acting oil cylinder in series between the two working oil cylinders to achieve synchronization or directly connect the two working oil cylinders in series to achieve synchronization, but this will double the working pressure of the system. Large, and because there will be a closed dead volume between the two working cylinders, an exhaust and oil supply device must be added, and it is easy to generate heat; the second is to add a cylinder with the same diameter as the piston rod on each oil chamber pipeline of the two working cylinders. Or a proportional double-rod double-acting cylinder, and the cylinder barrels of the two additional double-rod double-acting cylinders are fixedly connected together to share a piston rod. The main shortcomings of this method are: (1) If for some reason If one of the two working cylinders is stuck during operation or reaches the end of the stroke earlier, the oil pressure in the cylinder will double or form a high vacuum, precisely because of this "pressurized cylinder effect" Existence, especially under heavy load conditions, will lead to the occurrence of ultra-high pressure, causing damage and poor safety and reliability; The accumulation of synchronous errors caused by it is easy to cause obvious out-of-synchronization, thus causing abnormal operation of the driven mechanism; (3) The synchronous cylinder composed of double-rod double-acting cylinders connected in series has high requirements for processing and assembly , otherwise there will be a phenomenon of suffocation, which makes its reliability low and its service life short

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