Expand Shaft

What is the difference between the air shaft and the mechanical shaft?
 
      The gas rise shaft, also known as the air expansion roll, is a kind of winding and winding commonly used in paper coating, printing and other industries. After the compressed air is inflated, the key strip on the shaft surface can be raised (the shaft diameter is increased), and the air strip can be quickly retracted after the air is discharged (shaft diameter recovery) for tightening the cylinder core.
 
The difference between the gas rise axis and the mechanical axis is reflected in the following five aspects:
 
1. The air inflation axis has a short operation time, and the gas rising shaft and the paper tube are separated and positioned. It takes only 3 seconds to complete the inflation and air release, and does not use any part of the small shaft, that is, the paper can be tightly bitten. tube.
 
2. Paper tube placement sheet: Under the action of inflation and deflation, the paper tube can be moved and fixed at any position on the axial plane.
 
3, the bearing weight is large: the shaft diameter can be guaranteed according to the actual requirements of the customer, and the high hardness steel can be used to increase the bearing weight.
 
4. High economic efficiency: The shaft design has special functions and is suitable for the use of thick, thin, wide and narrow paper tubes.
 
5, simple maintenance, long use time: gas rise shaft is a single piece, each part has a fixed specification on its structure, can be used interchangeably, easy to maintain.
 
Strictly speaking, the inflatable shaft is easy to use, but not as stable as the mechanical shaft.

Technique parameter

 Detailed installation method of convex key inflation shaft (key strip gas rising shaft)
 
1. When the air-expansion shaft is installed on the male-type air-expansion shaft (key belt type air expansion shaft), firstly, the compressor that controls the gas pressure is in a stable state, and the filter is directly installed between the compressor and the expansion shaft to prevent impurities. Blocking the air tube creates a leak.
 
2. The air should enter vertically to prevent damage to the valve;
 
3. When the convex key type air expansion shaft (the air shaft of the key shaft) exhausts the exhaust gas, a standard exhaust port must be used. It is forbidden to use sharp hammers and other tools. Avoid causing air leaks;
 
4. Install pressure gauge and pressure control device, the pressure must be controlled within the range of 3-8kg/cm;
 
5. When replacing the nozzle of the male-type air expansion shaft (main shaft inflation shaft), a socket wrench must be used. If an internal fault occurs, it needs to be disassembled and repaired. Please consult with professional maintenance personnel. Do not disassemble it to avoid unnecessary loss.
 
6. The male-type air expansion shaft (key shaft inflation shaft) should be placed carefully to avoid damage to the air valve.


 What is the influence of improper selection of the convex type air expansion shaft?

Everyone knows the importance of the fan in life. It brings good ventilation to the locality, guarantees the smooth running of the people's life and production, and does not require the use of fans. The environment of these places is bound to cause many adverse effects, but Sometimes it is the use of a fan that does not necessarily improve the local environment. The fan will cause an inappropriate choice for this phenomenon, especially when the selection of the male-type air-expansion shaft is more cautious, if it is caused by the influence of the convex-type air-expansion axis. Is it improperly chosen?

When it comes to improper selection of fans, the first is the convex type of the air-inflated shaft, the convex-type air-expansion axis changes, and the male-type air-expansion shafts each have different effects. Therefore, the convex-key type inflatable shaft The choice of layers required for air volume and excess pressure, and secondly, the selection pressure is too large or too small. Choosing an increase in actual air volume caused by excessive pressure leads to increased power, increased energy consumption, increased initial investment, and increased scale and quality. The selection of too small a pressure will result in insufficient air flow to meet production needs. In addition, the motor with low load operation has a long cycle and low efficiency.

The problem was detected again, with a convex-key inflation shaft. Many male-type inflatable shafts are not detected and do not require adjustment or adjustment imperfections. Many of the fans at non-full load, if not timely and the necessary adjustments will cause the fan motor to retreat, which would be a waste of energy.

In addition, the improper management of the male-type air-inflated shaft will have a huge impact on the use of the fan, the effect of a considerable number of fans in the state of negligence or rated state management. In the long run, some fans are unreasonable. Some on-site staff members do not ask, and the energy-saving operation is reliable. Due to the need for on-site wind pressure, the air volume is not clear enough, coupled with the lack of necessary adjustments. Even an efficient fan option does not help, so-called high efficiency fans fall back.

All of these will affect the use of the effect and the use of the male-type inflatable shaft for safety, so be sure to position the fan type, problem detection, manage all the key-type inflatable shafts associated with the selection and execution of the male-type inflatable shaft. Preparation to ensure the safety of the male-type inflatable shaft.


The plate type gas riser shaft is widely used in almost all packaging and printing machinery factories. As a user of the plate type gas riser, the plate type gas riser will have problems during use, and they all want to solve it immediately, especially in an emergency. Tong Sheng explains for you:
 
       The maintenance of the plate type gas rising shaft is basically a leakage problem. Therefore, when the enterprise user finds the leakage of the plate type gas rising shaft, it is first necessary to determine where the leakage is. The first step is to check whether the nozzle has air leakage. If there is a leak, a new nozzle should be installed. In the second step, if it is confirmed that the airbag is leaking, the airbag needs to be replaced. Under normal circumstances, replacing the airbag is a relatively large movement, and it is necessary to have a professional tool to replace it under normal circumstances.
 
        Remove the air nozzle screw first, then lift all the key strips. If it is not lifted, the airbag cannot be removed. Because the airbag is used for a long time after use, the poor and expandable poor people cannot return to the smallest diameter, ie The expansion is even bigger. After the key is hung, knock the shaft head off with a big hammer. After the shaft head comes out, take out the airbag inside, and then follow the airbag to make a new airbag installation.
 
        In addition, it is necessary to pay attention to whether the sealing ring is worn at both ends of the airbag. If it is worn, it needs to be replaced, or the shaft is loose after the old sealing ring is installed. In this case, it is necessary to replace a new sealing ring. Align the screw holes on the shaft head, then insert the shaft head, tighten the screws, and install the air nozzle to check for air leakage, including checking for air leakage. When there is no leakage in the whole axis, the maintenance of the full-plate air-up shaft is completely processed.

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