Hydraulic system for mining machine control

FIELD: mining.

SUBSTANCE: invention relates to the field of mining and may be used in designs of mining machines and other fields of machine building. Hydraulic system of mining machine control is additionally equipped with hydraulic cylinders of telescope tightening, in working manifolds of which there is a hydraulic valve installed with logical function "OR", as well as controlled check valve with control cavity, besides inlet manifolds of hydraulic valve with logical function "OR", which is installed in working manifolds of hydraulic cylinders for telescope tightening, are connected to outlet channels of hydraulic valves with logical function "OR", which are installed in outlet channels of hydraulic distributors for control of hydraulic cylinders of actuator lift and rotation, and control cavity of controlled check valve is connected to outlet channel of hydraulic valve with logical function "OR", which is installed in outlet channels of hydraulic distributor for control of hydraulic cylinder of telescope extension.

EFFECT: invention increases rigidity and reliability of support structures of mining machine actuator, improves durability of machine as a whole.

1 cl, 1 dwg

 

The invention relates to the field of mining engineering and can be used in the construction of mining machines and other machinery.

A known hydraulic system of the harvester PU (M.: Nedra, 1974, AIESEC, Vignudelli, Wassoulou "Tunneling machines", str, 226, RIS), which includes the cylinders and rotate the Executive body and the cylinder extension telescope.

The disadvantage of this is similar decrease in rigidity of the support structures of the Executive body of the harvester when the extension of the cylinders of the telescope and the work of the Executive authority, as the cylinders extension telescope have no blocking and bracing of the working body in a certain position.

Also known hydraulic system of the harvester CCP (M.: Nedra, 1974, AIESEC, Vignudelli, Wassoulou "Tunneling machines", str, 225, RIS), which includes hydraulic cylinders move the Executive body: lifting, turning, moving telescope. For fixing the supporting structures of the Executive body in a certain position of the cylinders extension telescope equipped with hydraulic locks, and the fixed position of the Executive body may not change depending on the reactive forces acting on him at the combine in the pit.

This control system is the closest to the technical solution, adopted for the prototype. The disadvantage of this technical solution, as well as analogue, is to reduce the rigidity of the supporting structures of the Executive body of the combine because of the increased length of the console when nominating cylinders telescope, which leads to increased sensitivity combine to vibration from reactive forces acting on the Executive body at the combine in the slaughter, and as a consequence, to a rapid release of the harvester failure.

The present invention is a differential increase in the rigidity and reliability of the supporting structures of the Executive body of the mining machine to reduce the effects of reactive forces acting on the Executive body at the combine in the slaughter, and as a result, increase the durability of the machine as a whole.

The inventive hydraulic control system of the mining machine containing the pump, the cylinders extension of the telescope, lifting and turning of the Executive body with valves control the hydraulic cylinders in the output channels of the valves installed hydro with a logical "OR"function, additionally equipped with hydraulic cylinders Ref telescope, working in the highways which have a valve with a logical "OR" function and reverse operated valve with the control cavity, and the input line of the valve logicheskie "OR"function, set in the working lines of the cylinders Ref telescope, is connected with the output channels of the hydraulic valve with a logical "OR"function installed in the output channels of the control valves of the cylinders and rotate the Executive body, and the cavity of the control feedback controlled valve connected with the outlet channel of the valve with a logical "OR"function installed in the output channels of the valve control cylinder extension telescope.

Comparison of the inventive hydraulic control system of the mining machine with the prototype allows to make a conclusion about the absence of the latter characteristic, similar to the main feature of the inventive hydraulic control system of the mining machine:

- hydraulic control system of the mining machine equipped with hydraulic cylinders Ref telescope, working in the highways which have a valve with a logical "OR" function and reverse operated valve with the control cavity, and the input line valve with a logical "OR"function installed in the working lines of the cylinders Ref telescope, is connected with the output channels of the hydraulic valve with a logical "OR"function installed in the output channels of the control valves is of the cylinders and rotate the Executive body, and cavity control feedback controlled valve connected with the outlet channel of the valve with a logical "OR"function installed in the output channels of the valve control cylinder extension telescope.

The claimed technical solution is different from the prototype and should not be explicitly studied the prior art, therefore, the authors believe that the object is new and involves an inventive step.

The invention involves an inventive step in view of the fact that the hydraulic control system of the mining machine equipped with hydraulic cylinders Ref telescope, working in the highways which have a valve with a logical "OR" function and reverse operated valve with the control cavity, and the input line valve with a logical "OR"function installed in the working lines of the cylinders Ref telescope, is connected with the output channels of the hydraulic valve with a logical "OR"function installed in the output channels of the control valves of the cylinders and rotate the Executive body, and the cavity of the control feedback controlled valve connected with the outlet channel of the valve with the logical function "OR"that is installed in the output channels of the valve control cylinder vyd is to achieve telescope.

When Troubleshooting this characteristic disappears produced by the invention of the technical result. The invention is also a definite step in the development of technology and is progressive, as it improves the rigidity and reliability of the supporting structures of the Executive body of the mining machine to reduce the effects of reactive forces acting on the Executive body at the combine in the slaughter, and as a result, increases the durability of the machine as a whole. The hydraulic control system of the mining machine, which stated the invention may find wide application in the mining sector, other sectors of the economy, i.e. is industrially applicable technical solution.

The technical achievement of the hydraulic control system of the mining machine is ensured by the fact that it is additionally equipped with hydraulic cylinders Ref telescope, working in the highways which have a valve with a logical "OR" function and reverse operated valve with the control cavity, and the input line valve with a logical "OR"function installed in the working lines of the cylinders Ref telescope, is connected with the output channels of the hydraulic valve with a logical "OR"function installed in the output channels of the control valves g is gracilentum lifting and turning of the Executive body, and cavity control feedback controlled valve connected with the outlet channel of the valve with a logical "OR"function installed in the output channels of the valve control cylinder extension telescope.

This solution allows to increase the rigidity and reliability of the supporting structures of the Executive body of the mining machine to reduce the effects of reactive forces acting on the Executive body at the combine in the slaughter, and as a result, increases the durability of the machine as a whole. This is achieved by the hydraulic control system of the mining machine equipped with hydraulic cylinders Ref telescope, working in the highways which have a valve with a logical "OR" function and reverse operated valve with the control cavity, and the input line valve with a logical "OR"function installed in the working lines of the cylinders Ref telescope, is connected with the output channels of the hydraulic valve with a logical "OR"function installed in the output channels of the control valves of the cylinders and rotate the Executive body, and the cavity of the control feedback controlled valve connected with the output channel selector valve OR installed in the output channels of the valve the management is of the hydraulic cylinder extension telescope.

The essence of the invention is illustrated attached drawing, which shows a hydraulic control system of the mining machine.

The hydraulic control system of the mining machine (see drawing) includes a pump 1, the cylinders extension of the telescope 2, rise of the Executive body 3 and rotation of the Executive body 4, the valves control the hydraulic cylinders 5, 6, 7, output channels are installed hydro logical "OR" function 8, 9, 10, and additionally equipped with hydraulic cylinders Ref telescope 11, 12, working in lines 13, 14 which are mounted valve with a logical "OR" function 15 and reverse operated valve 16 with the control cavity 17.

The operation of the hydraulic control system of the mining machine is as follows: pump 1 (see drawing) the working fluid is supplied to the valves 5, 6, 7 control cylinders 2, 3, 4. If the valves all valves are in neutral position, fluid is freely discharged into the tank 18. When switching the control valve spool 5 control lift cylinder of the Executive body 3 in one of the operating positions of the fluid from the pump 1 is supplied to the lift cylinder of the Executive body 3 and the valve with a logical "OR" function 8, where the integration is : signal, arriving at the valve with a logical "OR" function 15, from him working fluid through line 13 enters the piston cavity of the hydraulic cylinders Ref telescope 11 and 12 and, via line 14, in reverse operated valve 16 which locks the fluid in the piston cavities of the hydraulic cylinders 11 and 12, thus providing GidroOGK telescope.

A similar process (see drawing) occurs when switching in any operating position of the control valve spool 7 control cylinder rotate Executive body 4, when the signal on the valve with a logical "OR" function 13, is formed in the valve with a logical "OR" function 10.

To work with the cylinder extension telescope 2 remove the force hydroptila. This is done as follows: by switching the control valve spool 6 in any working position (see drawing) the liquid is supplied to the hydraulic cylinder extension of the telescope 2 and the valve with a logical "OR" function 9 where the signal in the control cavity 17 reverse controlled valve 16, Otera it and connecting with the discharge piston cavity hydraulic cylinders Ref telescope 11 and 12. The fluid from the piston cavities of these cylinders seamlessly merges into the tank 18, thereby removing the force hydroptila telescope.

The guy who ravlicheskoy control system of the mining machine, what is additionally equipped with hydraulic cylinders Ref telescope, working in the highways which have a valve with a logical "OR" function and reverse operated valve with the control cavity, and the input line valve with a logical "OR"function installed in the working lines of the cylinders Ref telescope, is connected with the output channels of the hydraulic valve with a logical "OR"function installed in the output channels of the control valves of the cylinders and rotate the Executive body, and the cavity of the control feedback controlled valve connected with the outlet channel of the valve with a logical "OR"function installed in the output channels of the valve control cylinder extension telescope, allows to increase the rigidity and reliability of the supporting structures of the Executive body of the mining machine to reduce the effects of reactive forces acting on the Executive body at the combine in the slaughter, and as a result, increases the durability of the machine as a whole.

The hydraulic control system of the mining machine containing the pump, the cylinders extension of the telescope, lifting and turning of the Executive body with valves control the hydraulic cylinders in the output channels of the valves installed hydrocl the pans with a logical "OR"function, characterized in that the hydraulic control system of the mining machine equipped with hydraulic cylinders Ref telescope, working in the highways which have a valve with a logical "OR" function and reverse operated valve with the control cavity, and the input line valve with a logical "OR"function installed in the working lines of the cylinders Ref telescope, is connected with the output channels of the hydraulic valve with a logical "OR"function installed in the output channels of the control valves of the cylinders and rotate the Executive body, and the cavity of the control feedback controlled valve connected with the outlet channel of the valve with a logical "OR"function installed in the output the channels of the valve control cylinder extension telescope.



 

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