hr500-n piston double-discharge centrifuge
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I would like to ask how to solve the problem of the inability to increase the feeding speed of the HR500-N piston double-feed centrifugal oil pump. The relief valve has been fully closed, and the feeding speed remains around 55 times per minute. Due to the slow feeding rate, the alkali content in the brine exceeds the acceptable level, preventing the pump from functioning properly (this pump is used for desalination in the chlor-alkali evaporation process).
It is necessary to know the manufacturer of the device. Domestic HR500-N centrifuges come in two structural types. The increase in feeding speed not being able to occur due to oil supply at the tail end may be caused by severe leakage in the oil transfer seals, significant wear of the components inside the cylinder, and high internal leakage. Oil supply at the middle section might be due to problems with the oil transfer housing, such as cracks, as well as wear of the oil pump; a major overhaul is recommended
In recent years, Chongqing’s systems have used oil supply at the middle of the main shaft; it is necessary to inspect the oil delivery housing, the oil pump, the cylinder pistons, and the oil filter
Thank you, thank you. I was wondering if you have expertise with D5MC centrifuges; all the centrifuges in our factory are manufactured by Chongqing Jiangbei Machinery Factory
It is necessary to identify the cause in order to find the right solution. What you’re referring to is 1. low number of pushes. 2. The relief valve is closed, but it’s not explained clearly. There are a few points: 1. What is the designed number of push cycles? 2. Are it the number of pushes under no load or under load? 3. How is it confirmed that the relief valve is closed? Low pushing times are mainly attributed to the following components: 1. Oil pump 2. Oil transfer seal 3. Relief valve, throttle valve 4. Piston
The main reason for the low number of push operations lies in the hydraulic system. Solutions: 1. Is there a problem with the oil pump? Is the oil pressure at the pump outlet normal? 2. Is there a problem with the oil pipeline? Is the filter clogged? Are there any solid residues in the pipeline? Is there a leak in the oil pipe? 3. Is there a problem with the throttle valve? Is the flow rate of the working oil sufficient? 4. Is there a problem with the relief valve? Has the pressure been relieved? 5. Has the oil leakage from the oil transfer seal been confirmed? This is easy to confirm
The designed number of push cycles is 50–70; currently, 60 cycles under load are required to meet the process requirements. However, the number of cycles without load can be increased, while the number of load cycles cannot. We manually closed the relief valve completely on our own, but this also prevented the pressure from increasing, and as a result the number of pushes could not be increased either.
If the number of push operations at no load can be increased while it cannot be increased under load, the problem may lie with the piston rings; when the resistance to pushing is high, oil leakage through the piston rings increases
Simply put, it’s a leakage issue; just replace the piston assembly first
Maintenance technical documents for piston push centrifuges: http://348874896.qzone.qq.com/#!app=4
I’m also facing a problem with the HR800-N two-stage piston feed centrifuge: oil is leaking from the bearing behind the pressure medium conveyor, the feeding stroke is insufficient, the current consumption of the oil pump motor is high, and the oil pressure is also high. I would like some advice on this