Pipe burst detecting system for endurance test of hydraulic motor and detecting method

Abstract

The invention belongs to the technical field of hydraulic loop pipeline detection, and in particular, relates to a pipe burst detecting system for an endurance test of a hydraulic motor and a detecting method. The pipe burst detecting system for the endurance test of the hydraulic motor comprises a hydraulic pump and a hydraulic motor, which form a hydraulic system loop; a closed loop of an overflow valve is connected between the hydraulic pump and the hydraulic motor; a hydraulic pump P port pressure sensor is arranged in a P port of the hydraulic pump; a hydraulic pump S port pressure sensoris arranged in an S port of the hydraulic pump; a hydraulic motor A port pressure sensor is arranged in an A port of the hydraulic motor; and a hydraulic motor B port pressure sensor is arranged in aB port of the hydraulic motor. The pipe burst detecting system for the endurance test of the hydraulic motor and the detecting method prevent failed detecting results caused by errors of the sensors,improve the pipe burst detecting accuracy, are quick in response, and reduce the economical loss and the production delay caused by the pipe burst phenomenon.

Description

technical field [0001] The invention belongs to the technical field of detection of hydraulic circuit pipelines, and in particular relates to a burst detection system and detection method for hydraulic motor durability tests. Background technique [0002] In construction machinery, hydraulic hoses are usually used in medium and high pressure circuits, but the life of the hose will be reduced due to the change of medium and high pressure. Therefore, after the rubber hose burst, a large amount of oil was lost, and the system failed to shut down in time to cause certain losses to property and equipment. Due to the long period of the hydraulic motor durability test (usually 3 months), and generally no manual intervention is required during the test run to achieve unattended. However, because the hydraulic pipeline is prone to damage under high temperature and high pressure, if no one is on duty at this time, it will inevitably lead to a large amount of oil loss and pollute the ...

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Problems solved by technology

[0004] Adding an external solution requires adding an oil collecting tank on the outside of the rubber hose, which increases the cost of the equipment. At the same time, this method is only suitable for occasions where the equipment is small. If the pipeline is long, it is difficult to ensure that the oil collecting tank is installed next to all the pipelines.

The principle of image recognition and detection cannot exclude the normal action of the structure in the equipment. If there is an action in the equipment (such as hydraulic cylinder lifting), the system will recognize that there is an obvious change in the image, and it will be falsely reported as a burst tube, so the system will stop, that is, The system cannot detect the normal changes of the image and shuts down, which has great limitations

The pressure detection is relatively accurate, but if the pressure sensor is damaged, the device will still think that the tube is burst and shut down the device, so it cannot rule out the occurrence of the detected tube burst caused by the damage of the pressure sensor

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