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Liuzhou Yuqiao Prestressed Engineering Technology Co., Ltd.

LiuZhou jack manufacturer explains the reasons why smart tensioning machines fail to return oil.

Release date:

2020-12-31

The oil return speed of the intelligent tensioning machine depends on the flow rate of the oil pump. There are two types of oil pumps: one is a standard model, designated ZB2×2-50A. This type of pump returns oil slowly but is affordable, easy to maintain, and widely used on-site. The other is a high-flow oil pump, which returns oil quickly but comes at a higher price and is less convenient to repair.

Nowadays, many construction sites no longer rely on manual control by workers when performing tensioning—instead, they use computer-intelligent control technology, allowing instruments to automatically tighten the steel strands. However, smart tensioning machines often encounter issues with oil not returning properly, and many people aren’t sure why this happens. Below Liuzhou Jack Manufacturer Let me explain the reasons why it doesn’t return oil.
1. The oil return speed of the intelligent tensioning machine depends on the flow rate of the oil pump. There are two types of oil pumps: one is a standard pump, model ZB2×2-50A. This type returns oil slowly but is affordable, easy to maintain, and widely used on-site. The other is a high-flow oil pump, which returns oil quickly but comes at a higher price and is less convenient to repair. Currently, the corresponding industrial-grade technology is still not fully mature. Unless there are specific requirements at the construction site, it’s recommended to use the standard pump and tensioner for optimal performance and cost-effectiveness.
2. If the system can lift but doesn’t return oil, try swapping the two oil lines—up and down. If that works, the issue lies with the oil pump; otherwise, check whether the fittings are damaged.
3. Adverse Effects of Intelligent Tensioning Machines: Blockages in the oil suction pipe or oil supply lines, as well as pump malfunctions, can all disrupt the lubricant delivery, preventing oil from reaching friction surfaces located farther away from the pump. While the oil suction strainer and the pump itself may appear functional, issues like bearing wear or excessive clearance can lead to oil leaks and low oil pressure. This, in turn, prevents adequate lubrication of friction areas situated remotely from the pump, ultimately resulting in increased wear and surface damage.
4. Causes of Insufficient Lubrication: While insufficient lubrication and oil shortages certainly lead to inadequate lubrication, the reverse isn’t always true. Even when lubricant has reached the bearing surface, its viscosity might be too low to form an oil film of sufficient thickness. Alternatively, the lubricant may fail to provide proper lubrication because it has already broken down due to overheating, despite reaching the bearing surface.
That's all for now. Liuzhou Jack Manufacturer The editor explains the reasons why the smart tensioning machine isn’t returning oil—feel free to learn more about it.