SU1370193A2 - System for gas lubrication of working member of earth-moving machine - Google Patents

Abstract

This invention relates to earthmoving machines. The purpose of the invention is to reduce energy consumption by reducing the flow rate of gas used to lubricate the bucket type working member. The system contains the working body 1 and the bottom 2 with the collector 3 connected to the output chamber 4 of the pneumatic bypass valve 5. The valve inlet chamber 6 communicates through the receiver 8 and a source of compressed air 7. The chamber 4 has a piston 9 connected to the locking element 10. A spring 12 and an adjusting screw 13 are installed in the supra-cavity cavity 11. The cavity 11 is connected by hydroline to the soil pressure sensor 14, in the form of an elastic container (EE), which is filled with working fluid and installed vertically on the inner lanes The back wall of the working tool 1. In the initial period of bucket filling, the ground does not exert pressure on the EC sensor 14. The piston 9 is acted only by a spring 12, the force of which by means of a screw 13 corresponds to the minimum pressure value of the gas lubricant flowing through valve 5 to the manifold 3. As the bucket is filled with soil, the pressure on the EC sensor 14 increases. The pressure in the EC and in the cavity 11 increases, causing an increase in the maximum pressure value of the gas lubricant. 1 il. S (L 00

Description

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The invention relates to earth-moving machines equipped with gas lubrication systems for working bodies, in particular, machines with a bucket-type working body, and is an improvement of the known device according to author. No. 950863. I

The aim of the invention is to reduce energy consumption by reducing the flow rate of gas used to lubricate the bucket type working member.

The drawing shows the gas lubrication system of the working body of the earthmoving machine.

The gas lubrication system of the working body includes the working body 1, the bottom 2 and the adjacent gas manifold 3 with outlets Gas manifold 3 is connected to the outlet chamber 4 of the pneumatic bypass valve 5, the inlet chamber 6 of which is connected to the source of compressed gas 7 via the receiver 8 In the output chamber 4, a piston 9 is mounted, which is connected by a rod with a locking element 10, made, for example, in the form of a ball, which is installed with the possibility of opening and closing an opening that communicates the input 6 and the output 4 cameras. A spring 12 and an adjusting screw 13 are installed in the nadash cavity 11, and the cavity itself is made in the form of a hydraulic control chamber. The control chamber 11 of the valve 5 is connected by hydroline to a soil pressure sensor 14, which is made in the form of an elastic container filled with working fluid and attached vertically to the inner surface of the rear wall of the bucket.

The gas lubrication system works in the following way.

When the bucket is filled with soil, gas lubricant from the receiver 8 enters the inlet chamber 6 and then through the spring 12 opened by the force of the valve 10 into the outlet chamber 4 and through the pipeline into the gas collector 3. The outlet chamber 4 passes through the gas and simultaneously acts on the piston 9 and moves it upwards, overcoming the force of the spring 12 and closing the valve 10, which causes the cessation of the supply of gas lubricant to the gas manifold. After the pressure in the discharge chamber 4 has dropped, the piston 9 under the action of the spring 12 is lowered, again from

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Shutoff valve 10 "The maximum pressure of the gas lubricant entering the manifold is given by the force acting on the piston from above. In the initial period of bucket filling, the soil still does not exert pressure on the elastic cavity of the soil volume sensor 14, therefore there is no overpressure of the working fluid in the cavity and in the control chamber 11 of valve 5. The piston 9 is exerted only by the spring 12, the force of which with the help of screw 13 is set to what corresponds to the minimum pressure of gas lubricant supplied through valve 5 to manifold 3. Gas lubricant supplied under such minimal pressure to the bottom sliding surface and cutting off the soil chips , provides effective lubrication and facilitates the movement of chips in the direction of the rear wall. As the bucket is filled with soil, the pressure exerted by it on the elastic capacity of the soil volume sensor 14 increases. As a result, the pressure of the working fluid in the cavity and the control chamber 11 of the valve 5 connected to it increases. An increase in the pressure of the working fluid in the control chamber 11 causes an increase the maximum pressure of the gas lubricant flowing through the valve 5 into the gas manifold 3, which increases the effectiveness of the gas lubricant with an increasing volume of soil-Ha in the ladle. A receiver 8 coupled to a source of compressed gas allows the gas to accumulate while reducing or stopping its flow.

In comparison with the prototype, the application of the proposed technical solution ensures the reduction of energy consumption by reducing the consumption of gas lubricant in the initial period of filling the bucket with soil. This is achieved by automatically regulating the pressure of the gas lubricant supplied to the working member, depending on the mass of the soil in the bucket.

Claims (1)

Invention Formula Gas lubrication system of the working body of the earthmoving machine, auth.St. № 950863, distinguished by 1370193 This, in order to reduce the capacity, which is filled with energy consumption due to the reduction of whose liquid, the vertical flow rate of gas used for but on the inner surface of the rear lubrication of the working body of the bucket tee-wall of the working body is established and communicated pa, it is equipped with a pressure sensor with nadshtokovoy cavity of the relief soil, performed in the form of elastic valve „