SU1386758A1 - Hydraulic system - Google Patents

Abstract

The invention can be applied in the construction of construction road and mining machines operating under conditions of significant varying loads on the working body. The purpose of the invention is to increase the reliability of the hydraulic system by using an auxiliary cylinder as an additional front support for the body of the power cylinder. The pressure valve 14 is installed in the communication line 15. The cavity (p) 11 of the auxiliary cylinder 2 with the drain 10, П 16 of the hydraulic control of the valve 14 communicates with the rod П 7 of the power cylinder 1, and the input 4 of the safety valve 3 communicates with the piston P 6 of the cylinder 1. With an abrupt change in the load on the working body, the pressure in P 6 changes, and consequently, in P 11, which achieves the follow-up action of cylinder 2 on the load. When the working fluid is supplied to P 7, the valve 14 is turned on and simultaneously with the drain of the working fluid from P 6 depending on the angular movement of the cylinder 1, the working liquid circulates between P 11 and the oil without creating additional resistance to the angular movement of the cylinder 1 .. 2 Il. about (/

Description

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The invention relates to volumetric motors for the conversion of the energy of a working stream into the mechanical energy of an output link moving back-translational, and can be applied in the construction of building, road and mining machines, for example, excavating the elimination of the initial deflection. When applied to the force cylinder 1 longitudinal compressive force, i.e. supplying the working fluid from the source 9 of the feed into the piston cavity 6 of the power cylinder 1, the working fluid through the control cavity 17 when reaching the piston cavity 6

The pax, operating at a significant-fg pressure cylinder 1 required to compensate for the initial deflection of the power cylinder 1, turns on the pressure valve 3 and is fed into the working cavity II, on the stem J2 of the other variable loads on the working tool.

The aim of the invention is to increase the reliability of a hydraulic system by using an auxiliary cylinder 15 an increase in force is effected capable of

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as an additional front case of the power cylinder housing.

FIG. 1 shows the principal; heme of the power cylinder when it is located under the bearing element; ; and FIG. 2 - the same, with the location of the hell carrier element.

The hydraulic system contains power and | auxiliary cylinders 1 and 2, a safety valve 3 with an inlet 4 25 and OUTPUT 5, a piston rod 6 and 7 of the power cylinder 1 are connected through a distributor 8 to the power source 9 and a drain 10, auxiliary cylinder 2 is made of a single 3D cavity, its cavity 11 is connected to the outlet 5 of the safety valve 3, and the stem 12 of the auxiliary cylinder 2 is kinematically connected with the body 13 of the power cylinder 1. the hydraulic system is equipped with a pressure valve 14 installed in line 15 sat zi cavity 11 auxiliary Nogo cylinder 2 with the discharge 10, wherein the po- lfst 16 the pressure valve 14 communicates with the hydraulic control rod 7 polos- Tew cylinder I, and the input 4 of the safety valve 3 communicates with the piston cavity 6 of the actuator 1.

In addition, the safety valve 3 has a control cavity I7. The proposed device works as follows.

Prior to the application of a longitudinal compressive force, the elements of the power hydrocylinder have some initial deflection. To compensate for it (Fig. 1 and 2), valves 3 and 14 are adjusted in such a way that they override the line 15 of the cavity 1 of the auxiliary cylinder 2, maintaining, in it, the pressure of the working fluid and, therefore, the force on the rod 12, ensured

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To compensate for the deflection of the power cylinder 1, it tends to increase under the action of a longitudinal compressive force. With a sharp change in the load on the working body, such as an excavator bucket, it changes accordingly from the pressure in the piston cavity 6 of the power cylinder 1, which is the result of this load, and consequently, the pressure in the cavity 11, which achieves the following action of the auxiliary cylinder 2 on load.

When the working fluid is supplied to the rod cavity 7 of the force cylinder 1, the control cavity 16 turns on valve 14 and simultaneously with the discharge of working fluid from the piston cavity 6 of the power cylinder 1, depending on the angular displacement of the power cylinder I, the working fluid circulates between the working cavity il and drain 10, without creating additional resistance to the angular displacement of the power cylinder 1. When the pressure in the working cavity 1 of the auxiliary cylinder 2 reaches the value at which it compensates for the initial deflection, force cylinder I, valve 14 is closed and the circulation of the working fluid is stopped.

Claims (1)

Invention Formula The hydraulic system containing the power and auxiliary cylinders, a safety valve with inlet and outlet, the piston and rod of the cylinder of the power cylinder are connected through a distributor to the power source and drain, auxiliary cylinder ;; p is made single-cavity, its cavity is connected to the outlet of the safety valve, and cylinder kinematically connected with the body of the power cylinder, about tl and 0 five 5 d 0 five 0 five To compensate for the deflection of the power cylinder 1, it tends to increase under the action of a longitudinal compressive force. With a sharp change in the load on the working body, such as an excavator bucket, it changes accordingly from the pressure in the piston cavity 6 of the power cylinder 1, which is the result of this load, and consequently, the pressure in the cavity 11, which achieves the following action of the auxiliary cylinder 2 on load. When the working fluid is supplied to the rod cavity 7 of the force cylinder 1, the control cavity 16 turns on valve 14 and simultaneously with the discharge of working fluid from the piston cavity 6 of the power cylinder 1, depending on the angular displacement of the power cylinder I, the working fluid circulates between the working cavity il and drain 10, without creating additional resistance to the angular displacement of the power cylinder 1. When the pressure in the working cavity 11 of the auxiliary cylinder 2 reaches, a value at which it compensates for the initial deflection of forces The first cylinder I, the valve 14 is closed and the circulation of the working fluid is stopped. Invention Formula The hydraulic system containing the power and auxiliary cylinders, a safety valve with inlet and outlet, the piston and rod of the cylinder of the power cylinder are connected through a distributor to the power source and drain, auxiliary cylinder ;; p is made single-cavity, its cavity is connected to the outlet of the safety valve, and cylinder is kinematically connected to the body of the power cylinder, which is so that, in order to increase the reliability of the hydraulic system by using an auxiliary cylinder as e extra front cylinder, it is equipped with a pressure valve housing bearing mounted in the link the cavity of the auxiliary cylinder with a drain, wherein the hydraulic control chamber of the pressure valve is in communication with the rod end of the power cylinder, and the input of the safety valve is connected to the piston cavity of the pressure cylinder. tr 15 7 Gz figure 2.