A measuring device and measuring method for tiny leakage of hydraulic components

Abstract

The invention discloses a hydraulic element tiny leakage rate measuring device and a measuring method thereof. The hydraulic element tiny leakage rate measuring device comprises a three-way joint, a first high pressure valve, a second high pressure valve, a low pressure valve, a hydraulic pipeline, a measuring cup with scales. The A end of the three-way joint is connected with a low pressure oil cylinder oil outlet of a tested work piece, the B end of the three-way joint is connected with a test stand by the first high pressure valve, and the C end of the three-way joint is connected with the inlet of the second high pressure valve. The outlet of the second high pressure valve is connected with the measuring cup with scales by the hydraulic pipeline, and the hydraulic pipeline is vertically and upwardly provided with the low pressure valve close to the second high pressure valve. The measuring results can be acquired by the five-step measuring method. By adopting the device, the orientation of the hydraulic element oil port joint is not limited, and the user is not required to wait for the draining away of the internal residual oil for a long time, and the internal chamber is not required to be filled with the leaked oil after the long-time pressurizing, and the continuous measurement of the leakage amount can be realized, and the error is small. The device is advantageous in that the structure is compact and reasonable, the use is convenient and fast, the data measurement is accurate, and the test standard requirement can be satisfied.

Description

technical field [0001] The invention belongs to the field of test equipment, and relates to a leakage measurement device for internal leakage tests of hydraulic components, in particular to a small leakage measurement device for hydraulic components. Background technique [0002] At present, domestic related enterprises generally use measuring cups to measure leakage when conducting internal leakage tests of hydraulic components, especially when the leakage is small. However, using a measuring cup to measure, this method has the following disadvantages: First, the placement of the hydraulic components is limited during the internal leakage test, that is, the oil port connectors of the hydraulic components cannot be placed as they are in normal use, but the oil port connectors can only be placed horizontally And below the horizontal direction, so that the oil can be caught by the measuring cup. Because when the oil port joint of the hydraulic component faces above the horizo...

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Problems solved by technology

However, using a measuring cup to measure, this method has the following disadvantages: First, the placement of the hydraulic components is limited during the internal leakage test, that is, the oil port connectors of the hydraulic components cannot be placed as they are in normal use, but the oil port connectors can only be placed horizontally and below the horizontal direction, so that the oil can be caught by the measuring cup

However, no matter whether the measuring cup is used for measurement or "a wide-range internal leakage detection device for hydraulic components" is used for measurement, the test time is long, because after the internal leakage test is started, the high-pressure oil chamber leaks When the oil in the low-pressure oil chamber flows to the oil outlet, it must first stick to the inside of the low-pressure oil chamber, the oil port and the inner wall of the joint until it is completely covered, and then the leaked oil will continue to flow out to form oil droplets before using the measuring cup. Collect or use "a wide-range internal leakage detection device for hydraulic components" to measure, so the test needs to be pressurized for a long time

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