High Productivity Corn Hammer Mill Tiny Vibration Water Drip King Serial

1. Application and characteristics

⒈ WL series mill can crush all kinds of granular feed materials, such as corn, sorghum, wheat, broken cake and other materials.

⒉ The mill adopts steel plate welding structure. Motor and mill rotor are installed on the same base, using the straight pin coupling joint rotation; After dynamic balance check, the rotor can work in a back-and-forth manner to extend the service life of wearing parts. The operating door is equipped with safety interlock device to ensure that the motor cannot start when the operating door is opened. The feeding port is on the top of the crusher, which can be matched with various feeding mechanisms. The hammers are arranged symmetrically.

⒊ The rotor of this machine is specially designed with two different types of hammer-screen clearance, one is used for rough crushing, the other is used for fine crushing; it can be arranged as micro powder hammer to do the minute crushing to meet the users’ various fineness requirements of raw materials.

⒋ The machine's structure is reasonable, it is robust and durable, safe and reliable, easy to install, easy to operate, its vibration is tiny and its productivity is high.

In order to maximize crushing efficiency, it is recommended to select the frequency conversion impeller feeder produced by our company to match with it.

2.The main technical parameters and performance indexes

1.Main technical parameters refer to Table (1)

Table (1) Main technical parameters

Table (2) Performance indexes

Note:

The above indexes are intended to meet the following conditions: Feed stock is corn, with moisture content ≤14%, bulk density≥0.72 t / m3. Mill sieve aperture diameter is ф 3 mm, opening rate is≥33%. Sieve negative pressure ≥ 1000pa.

3. The main structure and working principle

(1) The main structure to see Figure 1

1. Base 2. Rotor assembly 3. Door 4. Upper cover 5. Feeding guide mechanism

Feature 1 Mill structure schematic diagram

1. Base: play a role of joining and supporting the various components of mill, to form a whole crushed material discharging from the base below.
2. Rotor: composed of spindle, rotor disk, pin roll, hammer positioning pin roll, hammer and other components, which is the main running part of mill. Rotor speed is higher, in the case of no pin roll and hammer installation after the assembly, dynamic balance has to be carried out, with balanced differences ≤ 5 g.
3. Doors: Operating doors: open the operating door when replacing the sieve plate or hammers. Roller wheel is equipped under the door; the door can slip to one side after opening. The sieve plate is pressed by a special tightening mechanism.
4. Upper casing: the upper part is provided with a feeding port, the lower part is connected with the base, and the two sides are respectively equipped with a sieve plate, forming a crushing chamber with the rotor. The material is crushed in the crushing chamber. And there is a rotor disassembly board at the rotor center in horizontal direction, making rotor assembly dismounting more convenient.
5. Feeding guide mechanism: make materials go into the crushing chamber from the left or the right. Manual commutation of feeding guide plate and change the motor running direction automatically by travel switch, make the rotor rotating direction consistent with the feeding direction.

(2) Working principle

The feed stock is fed from the top feed inlet through the feeding mechanism matched with the machine and enters the chamber from the left or right side through the feed guide plate. See Figure 2 for details. Under the action of high-speed rotating hammer plate and the friction of sieve plate, the material is crushed gradually and sent out from the base outlet under the centrifugal force and air flow through the sieve hole.

Figure 2 Schematic diagram of feeding guide plate direction that matched with spindle rotating direction

4. Installation

⒈The spindle and the motor of this machine are directly driven by the pin coupling. Motor is mounted on the base directly. There are screw holes under the base. The mill is fastened to the foundation by anchor bolts, or installed on the basic level after fixing the backseat of shock absorber (Foundation drawing refer to the attached Figure 4).The installation dimensions of this machine refer to the sample chart.

⒉ There should be starter, protector and electric instrument of corresponding power with the machine. Mill spindle rotating direction is determined by the feeding direction. Feeding direction is controlled by the feeding guide mechanism, and control the rotating direction of the motor automatically by travel switch. The direction of feeding guide plate should be matched with the spindle rotating direction.

⒊ The safety device of the door on both sides is actualized by travel switch.

5. Handling Precautions

1. Operator should understand the structure of the machine, be familiar with the machine’s performance and operation method.

2. Before starting the machine, check each connection part carefully, no looseness is allowed. .

3. Check whether the rotor rotation is flexible; no noise of jamming, bump, friction, etc. is allowed.

4. Only when the safety of operator and machine are guaranteed can the machine be started. After 2~3 minutes of idling running can do the feeding. The air suction system must be in normal working state before feeding.

5. Feed quantity should be uniformed, not erratic, to ensure the motor work under a rated load.

6. Empty running of 1 to 2 minutes after the machine finishes the work, to crush and discharge all the materials inside before stopping the machine.

7. If there is strong vibration during the mill operation, shut down immediately to check, find out the cause, the machine can only be started after the elimination of the failure.

8. Cleaning work and necessary checking work should be done after every shift.

6. Adjustment and maintenance

(1) Adjustment

1. Adjustment of hammers: the hammers in the rotor are arranged in a symmetrical manner, which must be arranged in strict accordance with the requirements during installation. The weight of the corresponding two sets of hammers must be ≤5 grams. After the abrasion of the hammer’s first angle, change the direction of the feeding guide plate to make the rotor do reverse rotation, then using the hammer's second angle for working. After the abrasion of the two angles, it should be replaced with new hammers (see Figure 3). When do new hammers’ replacement, open the door and push it to the one side, release the handle of the compacted screen mechanism, put down the compacted screen mechanism, loose the locking sleeve of the pin roll with a screwdriver, extract the pin roll and replace the hammers. After completing the replacement, tighten the locking sleeve on the pin roll.
2. Adjustment of sieve plate: select the corresponding sieve plate according to the fineness of crushed material. The sieve plate should be replaced in time after being worn out or damaged. The sieve plate should be loaded from both sides and pressed by pressing mechanism.

Figure 3 Abrasion conditions of hammer

(2) Maintenance

1. Operate strictly in accordance with the operation methods; every shift should do the necessary inspections and cleaning work.
2. After 1000 hours of running of machine,, the bearing should be removed and washed once, and the grease should be replaced. The grease should be filled with lithium-based molybdenum disulfide grease. When filling the grease, the gap of the bearing should be filled with only 1/2-3/4. When the oil is refilled, the crude oil should be cleaned. If the oil is added too much, it will cause the bearing to heat up. If the heat is serious or the grease flows out, it should be stopped immediately and deal with it.
3. Do repair and replacement immediately when the components are damaged or badly worn. The rotor part (excluding pin roll and hammers), if it needs to be taken apart to do the replacement, dynamic balance test should be taken after re-assembly. Balancing quality is checked according to the rigid rotor balancing grade G6.3 of the national standard GB9239-88.
4. If the machine will stop for a long time, both inside and outside of the machine should be cleaned up and remove the dustiness, to prevent corrosion and the sieve pore blocking.

7. The general failure and troubleshooting

Table 3 General failure and troubleshooting