Views:38 Author:Site Editor Publish Time: 2020-09-09 Origin:Site
Due to changes in temperature and pressure, some parts in the engine and other parts of the car will change in size.
Because of the characteristics of the material, the worm drive hose clamp cannot automatically shrink and expand to adapt to the changes in the size of these parts caused by changes in temperature and pressure.
In an environment with a temperature of 20°C, the radial clamping force generated by the spring clamp has fully guaranteed the sealing of the connecting parts, while the radial clamping force generated by the worm drive hose clamp under the same conditions is much higher. It is not that the higher the clamping force, the better, too high clamping force may cause the hose to deform and accelerate the hardening and cracking of the rubber parts.
When the temperature drops from 20°C to -40°C, the hose at the connecting part of the soft and hard pipes will shrink, but because of the characteristics of the product, the diameter of the worm drive clamp will not change, so the hose and the worm drive clamp The pressure will be reduced, which may eventually lead to a reduction in the effective clamping force of the entire connection system.
The spring clamp requires a special clamp to be clamped during installation, while the worm drive clamp is tightened by screws, and the worm drive clamp is not affected by the size of the installation. The spring clamp on the small hose only needs to put the opened clamp to the installed position when closing the clamp to complete the operation. The larger spring clamp is affected by the tool and the clamping force.
However, the spring clamp will not cause the entire system to fail due to the potential high or low torque during installation of the worm drive clamp.
To be sure, the worm gear hose clamp is tighter than the spring clamp. As long as the worm gear clamp is not deformed, you can continue to apply force and tighten it. However, the spring clip is still sufficient to meet its design requirements, otherwise it will no longer be used today. As long as the worm clamp is made of stainless steel, the worm clamp is likely to last longer. However, in fact, any fixture should be used continuously during the life of the car.
The problem with the worm drive clamp is that it cannot passively adjust the way the constant tension clamp is used. This usually leads to leaks and/or damage to components. Especially the plastic water neck. It is difficult to squeeze the spring clip, but a worm gear with a screw will do, and it is much easier to use and put on.
Clamps are used in automobiles. After a lot of vibration, the worm gear hose clamp may "return" or loosen, but ordinary spring clamps are easier to loosen under vibration because there is no positive stop (maximum expansion). Their clamping pressure is also low. all springs get tired over time.
The cost of mass production and use of spring clamps is much cheaper than that of worm gear clamps.
The spring clip is easy to use on smaller hoses. The spring clamp applies pressure evenly, while the worm gear clamp only applies pressure in one position.
They apply uniform pressure around the joint, while worm drive clamps do not. The worm drive clamp is pulled out from one side, which can stretch the hose and pull it to the screw area. In smaller sizes, worm drive clamps leave a flat spot under the screw fitting; this leaves low pressure areas at the ends of the screw joint. However, as the rubber of the hose dries and shrinks over time, the most important spring clip continues to apply pressure, resulting in a longer joint life and no maintenance.
The spring hose clamp has better sealing performance and torque compensation performance, but because the product itself has no structural constraints, its resistance to pull-off is low, and it is not recommended to be used in a pipeline system with a working pressure greater than 0.15Mpa (according to the pipeline matching determine)
Piping systems with a diameter greater than 40mm are not recommended. The main reason is that it is difficult to operate with conventional calipers during installation. Due to the greater flexibility of large-size products, there is a certain risk of industrial injury.
Spring hose clamps are usually made of steel alloy and galvanized to prevent corrosion. Due to its elastic limit and low cost, aluminum is not an ideal choice for spring clips. The formation of aluminum springs also requires heat treatment and tempering after formation, and then corrosion protection (such as anodization), which increases the cost. Steel spring-type hose clamps have several advantages over worm gear clamps because they continue to apply the same clamping force under all environmental conditions throughout their service life.
We provide various types of hose clamps, including those suitable for automobiles, especially those with smaller diameters. The stainless steel clamp has corrosion resistance to avoid leakage caused by insufficient clamping force due to the corrosion of the clamp. These include many favorite non-perforated clamps with curled edges. There are also have clamps with holes and spring clamps etc,.
Regardless of which clamp you choose, it is also important to remember that clamps should not provide the main seal, while hoses and their accessories can provide the main seal. The purpose of the clamp is to prevent the hose from slipping off, so over tightening them is useless. Choosing a clamp to choose a suitable clamping range can eliminate the need to choose a higher clamping force. If the joint still leaks with a suitable clamp, then it is time to replace the hose, do not tighten it tighter.