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Solution to oil leakage of Roots blower and replacement of oil seal of Roots blower

Source: Roots blower manufacturer Published on: February 12, 2022 Hits:

The oil seal group of Roots blower is usually composed of 3~4 skeleton oil seals, two of which are installed back-to-back on the inside in contact with the gas to be transported, and the other one (or two) is installed on the outside. All elements are installed in a sealing seat to form a sealing group, and the middle can be lubricated with grease. The skeleton oil seal group belongs to the contact type seal, which is easy to cause wear of the shaft (contact part with the oil seal lip). However, due to its simple structure, convenient assembly and disassembly, low cost, good sealing effect, and low requirements for working environment and maintenance, it has been widely used in practice.

Please roll the roots blower by hand to judge whether there are sundries left inside the roots blower during the process of installation. Check the device orientation of the check valve, whether it can turn over along the direction of the air outlet, and whether it is aligned with the device in the pipeline. When starting up and shutting down, make sure that all valves on the pipeline are opened to the maximum position, and do not turn it down to avoid that the air volume cannot be discharged in time, adding pressure to the roots blower, causing the motor to heat up or even burn out.

Since the fan belt is imported, its spread is relatively large. Please tighten the belt 3 days after startup, and tighten the belt again 7 days and 14 days after startup. Please remove the air inlet skin plug (thin rubber strip) above the pressure gauge and check the pressure every shift. Under the additional pressure on the nameplate, directly connect the Roots oxide blower after starting.

Please check the engine oil and butter regularly and replenish them in time. The engine oil and fresh air blower should be replaced with new oil for the first time after a week of operation, for the second time after a month, and once every six months in the future. It must be replaced before summer (220 # medium load industrial gear oil). Add butter every two weeks (to form lithium base grease ZL-3H).

Generally, roots blower only needs one oil seal, which is installed in the hole cover. The high-pressure oxidation fan has 6 oil seals. One for each of the four bearings (equivalent to a seal ring), and two for the gland. Before starting up the three blade direct coupled oxidation fan: pay attention to the oil level before starting up, and the oil injection amount should reach the red dot position indicated on the oil window.

Oil seal installation method of Roots blower:

1. If two oil seals are installed in one oil seal seat of Roots blower at the same time, they cannot be stacked together and pressed in at one time; Press one of the oil seals onto the finger first. And then install another oil seal;

2. When installing the oil seal, do not mistake the installation direction of the oil seal, and point the working surface of the oil seal to the side to be sealed;

3. When the roots blower oil seal is installed, when the lip passes through the key slot, thread, shoulder and other cutting edges, metal guide sleeve or thin mesh reel shall be used for protection; 4. When pushing the Roots blower oil seal up the shaft, use a screwdriver to rotate along the inner diameter of the shaft seal, and push while turning to avoid lip damage and spring falling off.

5. Micro leakage of Roots blower oil seal at the initial stage of operation is allowed. Generally, the leakage may gradually stop with the extension of operation time.

When installing two oil seals in one oil seal seat, do not press them together at one time. One oil seal must be pressed in place before the other. At the same time, do not mistake the installation direction of the oil seal, and point the working surface of the oil seal (that is, the side of the buckle spring) to the side to be sealed. As with the installation of O-ring, when the oil seal lip passes through the thread, keyway, shoulder and other cutting edges, it should be protected by a metal guide sleeve or a thin copper sheet reel.

When pushing the oil seal up the shaft, in order to avoid lip damage and spring falling off, use a screwdriver to rotate along the inner diameter of the shaft seal, and push while turning. Micro leakage of oil seal at the initial stage of operation (within 5~100h) is allowed. Generally, the leakage may gradually stop with the extension of operation time. In order to avoid leakage during maintenance, it is not advisable to apply excessive radial pressure (such as using too short spring) to the oil seal, which will easily burn the oil seal lip.

I believe that after reading the above contents, you should also understand the method of replacing oil seal of Roots blower. I hope it will be helpful to you.

Text label: Roots blower

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