Star-wheel synchronization hydraulic system for tunneling machine
A technology of hydraulic system and roadheader, applied in the field of hydraulic system, can solve the problems of easy error, low reliability and difficult adjustment of pipeline configuration, and achieve the effects of superior power adaptation function, energy saving and precise control
Inactive Publication Date: 2008-07-02
SHENYANG MINING MACHINERY GROUP
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Problems solved by technology
[0002] The star wheel mechanism on the roadheader is a device for transporting materials to the next-level conveyor. Therefore, the synchronization of the two star wheel speeds has an important impact on the reliability of the roadheader. The existing domestic roadheaders use star wheel synchronous hydraulic pressure. Most of the systems use diverters or diverter valves to ensure the synchronization of the star wheels. These two methods have the disadvantages of easy mistakes in pipeline configuration, difficult adjustment of diversion errors, and low reliability.
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[0008] The star wheel synchronous hydraulic system of the roadheader of the present invention includes a pump and a pump variable mechanism, a multi-way reversing valve and a hydraulic motor, as shown in Fig. 1, and is characterized in that the constant power load-sensitive axial plunger with a pressure cut-off function is variable The S port and the oil return port T1 of the pump 2 are connected to the oil tank 1 through pipelines, and the pump variable mechanism 3 of the pump 2 itself directly connects the six-way proportional multi-way directional valve with pressure compensation and load sensing functions through the pipeline X1 The Ls port of 4 is connected, the leakage oil port Y port of the six-way proportional multi-way reversing valve 4 is connected with the oil tank 1 through the pipeline, and the oil inlet P1 of the six-way proportional multi-way reversing valve 4 is connected to the A of the variable pump 2 The ports are connected by pipelines, and the valves in the...
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The invention relates to a star wheel synchronization hydraulic pressure system for a excavation machine, which is characterized in that: a constant load sensitive shaft with pressure cutting function is connected with a piston variable displacement pump and a six-way proportional multichannel reversing valve with the functions of pressure compensation and load sensing, two plate valves are arranged in the six-way proportional multichannel reversing valve to respectively connect and control two star wheel hydraulic pressure motors, and pressure compensation valves are respectively connected on the oil inlet pipeline of each plate valve to adjust the flow values of the two plate valves, thereby enabling the two hydraulic pressure motors to rotate at a synchronized speed and a piloted port of the proportional multichannel valve to be connected with a manual proportional piloted valve. The invention has the advantages of that the design is provided with simple pipeline arrangement and controllable shunting error, and is free from the influence of load change.
Description
technical field [0001] The invention belongs to a hydraulic system for ensuring the synchronism of star wheels applied on a roadheader. Background technique [0002] The star wheel mechanism on the roadheader is a device for transporting materials to the next-level conveyor. Therefore, the synchronization of the two star wheel speeds has an important impact on the reliability of the roadheader. The existing domestic roadheaders use star wheel synchronous hydraulic pressure. Most systems use diverters or diverter valves to ensure the synchronization of the star wheels. Both methods have the disadvantages of easy error in pipeline configuration, difficult adjustment of diversion errors, and low reliability. Contents of the invention [0003] The object of the present invention is to provide a star wheel synchronous hydraulic system for roadheaders, which has the characteristics of simple pipeline configuration, controllable diversion error and no influence of load changes. ...
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Login to View More IPC IPC(8): F15B11/16F15B11/05E21C35/20
Inventor 穆春宏崔闯吕宏伟汪清波
Owner SHENYANG MINING MACHINERY GROUP