1. Whether the moisture of the crushed raw materials exceeds the standard.
Countermeasures: Improve the moisture content of raw materials.
Crushing raw material moisture changes, this is the first reason for the decline in production capacity;
2. The pore size of the sieve does not meet the requirements, resulting in excessive pulverization of the material.
Countermeasure: Replace the sieve and check the suction.
3. Is the installation of the matte and glossy surfaces of the screen correct?
Countermeasure: Reinstall the screen (with the face facing inward and the glossy side facing out).
The installation requirement of the sieve is that the matte side faces outwards. Why? When the matte side is white, it is involved in the crushing. The normal material is the three kinds of rubbing friction between the hammer, the material and the sieve. If it is a matte surface The outward direction will cause the material of the pulverizer to sag and stick to it, which will affect the discharge of the pulverizer. Therefore, the installation requirements of the sifter must be mastered, and the matte side faces out.
In addition, the venting method of the screen is 90 degrees with the feeding direction, and there is no blind zone in the material direction. If there is a blind zone, the utilization rate of the sifter will be reduced, that is, the opening of the normal sieve. rate.
4, the feed guide plate and the main engine steering is the same
Countermeasure: Adjust the direction of the pulverizer feed guide.
On the left side, the main unit rotates clockwise, and the direction is along the direction of his tangent. If the direction of the guide plate is adjusted, look at the right picture, the main body rotation should also be adjusted accordingly, and the main body rotation will change. In a counterclockwise direction.
5. Is the injection of the solenoid valve of the dust collector normal? Is the filter bag blocked?
Countermeasures: Exclude the solenoid valve problem and replace the dust filter bag.
Check the solenoid valve diaphragm for any problem. There is a method. Look at the first picture on the left side. There is a vent hole next to the solenoid valve. This black color is the coil of the solenoid valve. There is a vent hole at the back. The handle is placed in the row. On the side of the stomata, one hand grabs the No. 1 solenoid valve, and the other hand grabs the No. 2 solenoid valve. When the No. 1 solenoid valve has gas, it proves to be good; if the left hand is the No. 1 solenoid valve, the right hand It is the No. 2 solenoid valve, the No. 1 solenoid valve is blowing, and the second right hand feels the air coming out, which proves that the No. 2 solenoid valve leaks, and the diaphragm is damaged. 6, dust collector fan configuration, fan steering error countermeasures: adjust the fan steering.
There was a fault before the fan, and it was dismantled and repaired. After the repair, it was installed and reversed and they were not checked. For 5 years, the dust collector did not work. Therefore, this is very important. As long as the fan and motor are repaired, the direction of the fan must be paid attention to.
7. Is the hammer screen gap suitable and the hammer is worn seriously?
Countermeasure: Adjust the hammer screen clearance and replace the hammer.
Inappropriate hammer screen gaps can cause a drop in productivity. For example, crushing corn and crushing corn generally use large gaps.
8. Whether the crusher screen is seriously worn.
Countermeasure: Replace the crusher screen plate accessories.
The hammer screen gap becomes larger, and another one will cause the bottom to leak. This is the new screen plate on the upper right of the picture. The pressure plate is not worn out in time. Many customers will neglect this. This is a key point. Because this accessory is critical, it directly affects the pulverizer hammer screen clearance.
9. Is the hole pattern of the sieve piece correct, and the opening rate is too low?
Countermeasure: Replace the sieve.
The calculation method of the opening ratio has a formula: 90.7*D2/T2 (%), D represents the diameter of the mesh, and T represents the pitch of the hole. According to this formula, the opening ratio of the sieve can be measured. The above picture is a standard for shepherd sieves. You can make a reference. For example, the 2.0 sieves generally have a hole spacing of 3.0 and an opening ratio of 40%.
10. Whether the air supply door of the supporting impeller feeder is not open (the opening degree is not suitable).
Countermeasure: Adjust the air supply door of the impeller feeder.
Look at the picture on the right, this damper must be opened. The last time we served the Miles, many customers in Inner Mongolia have used it for many years, and this has been opened.
11. Is there any air leakage in the settling chamber (especially between the air transport system, the crusher and the settling chamber)?
Countermeasures: The leakage of the settling chamber can be treated with foam rubber.
When the customer inspected, check whether the material of the material wind auger has overheating, can judge whether there is excessive crushing, and then touch a hand to touch the room to see if there is any air leakage.
12. For the secondary pulverization process.
Countermeasures: Adjust and improve the formula to control the oil content of the material to be pulverized.
If the customer pulverizer is used for secondary pulverization, first check whether the material has been pulverized once, and whether the material is added with grease during the secondary mixing. If the grease exceeds 5%, the capacity of the pulverizer is very high. Great impact. For example, if the grease is particularly large, the mesh holes are easily blocked. In addition, it depends on whether there are any raw materials such as silkworm cocoons in the formula. Because the cocoons are more difficult to smash, it is necessary to improve the formula and control the oil content of the materials to be pulverized, and the normal control is within 5%.
Summary:
Analysis of the reasons for the decline in crusher capacity, the main ideas are:
First: the moisture content of the crushed raw materials exceeds the standard, causing the equipment capacity to decline;
Second: the mesh hole does not meet the requirements, resulting in excessive pulverization of the material, resulting in a decrease in production capacity. Third, the smooth surface of the pulverizer screen and the rough surface are installed incorrectly, resulting in a decrease in production capacity. When communicating with customers, if the customer proposes a pulverizer Recently, the production capacity has dropped. The principle first asks the customer whether there is self-examination. If the self-examination is to consider whether the moisture of the raw material has been changed, whether the sieve is used improperly or not; the other is the installation of the sieve surface and the smooth surface. The problem.
Fourth: the feed guide plate and the main engine are inconsistent, and the direction of the guide plate is incorrectly placed. This is also checked by the customer in their daily work. For example, each class needs to be reversing, and there is a mistake in the position of the guide plate when changing directions.
Fifth: Check if the dust collector solenoid valve is blown properly and check if the filter bag is blocked. This has a matching dust collector next to the crusher.
Sixth: Check the dust collector fan configuration, whether the fan steering is wrong.
Seventh: Check if the hammer screen clearance is suitable and the hammer is seriously worn.
Eighth: Check whether the crusher screen is seriously worn, and the wear will cause the capacity to drop. This screen is very important. If the screen is worn, the first one will cause the screen to move, and the gap between the screens will become larger. After the second screen is worn, the hammer gap will change. Large, will affect production capacity.
Ninth: Check if the hole pattern of the sieve is correct and the opening rate is too low. The opening rate formula has just been told 90.7*D2/T2 (%), D represents the diameter of the mesh, and T represents the hole spacing. This formula can give the customer a brief introduction.
Tenth: Check if the air supply door of the supporting impeller feeder is not open (unsuitable opening).
Eleven: Check the settling chamber for air leakage. (especially the wind transport system).
Twelfth: For the secondary pulverization process, check the ingredients and fat content of the formula. For example, if we control it within 5%, the oil should not be too much.
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