How to Solve Rotary Vibrating Screen Clamp Gets Hot and Current Rises Problems?

Rotary vibrating screen model:XZS-1500-3
Screening material: calcium carbonate
Mesh size: mesh#100, mesh#200 and mesh#325.


Customer :The stainless clamps is very hot. Especially in the screen mesh 325. We were forced to stop the operation. What can you suggest we will do?

PK Machinery: You said the stainless clamps is very hot, normally it is caused by bolt looseness of clamp, please tighten the bolt of the clamp.

 

Customer: When it is loaded with the material for screening, the current will rise from 7.5amperes to 15 amperes. It even rises to 30 amperes and the circuit breaker of 15 amp broke. How much current reading is the normal operation?

PK Machinery: Please check whether the power wires and grounding wires are well connected or not .
Concerning the current rising, normally, current rises when the machine starts to run for seconds, it will become normal later soon.


Customer: We tried to work on the machine. Tighten the clamps, and check on the wires. Its is doing well. Thanks very much!

What Shall We do to Solve Slow Material Discharging of Rotary Vibrating Screen ?

when we handle material in our daily life, we may encounter such situation : material discharging is slow. It may cause by the reasons as following aspects:
1. Check whether the screen mesh cloth and impurity removal is level or not, or if it is over height, normally it should be higher than about 5 mm, the discharging outlet design is different according to different material types.

2.During operation, check the screen mesh surface or if the discharging outlets are in the level, this has direct relation to the sieving effect. If it is not level, please adjust timely. Rotary vibrating screen is equipped with supporting foundation bolt before leaving factory, customers can adjust the rotary vibrating screen in the level and lower it properly by adjusting the foundation bolt.

3.Besides, the key point is to adjust vibration motor upper and lower eccentric block angle, smaller angle can make the material distribute and spread outwards fast, on the contrary, larger angle will make it slow .Adjustment of the eccentric block vibration motor angle should be around 5 degrees, if you have strict requirements on screening accuracy, the angle should not be too small, otherwise the material will spread outward quickly which is not good to the screening effect. Usually ,the angle of rotary vibrating screen motor upper and lower eccentric block angle is 45 ° before leaving factory.
 

How to Replace Screen Mesh Cloth of Rotary Vibrating Screen?

There will be screen mesh damage or irregularity phenomenon if rotary vibrating sieve has been used for a long period of time, thus we need to replace screen mesh cloth, the method is shown as follows:

1. First loosen the screw of rotary vibrating screen clamp by wrench, take down the upper frame, then you can take down the damaged screen mesh cloth and put on a new mesh cloth.

2. Put the new mesh cloth smoothly on the coarse mesh cloth, then press the fine mesh cloth on the net rack by tension strip ,tighten the tension strip by using a cross screwdriver, when you are in the process of gradually tightening ,you can tension the fine mesh cloth evenly lightly by hand all round, thus the well tighten fine mesh cloth will be very flat and tight which will increase material screening percentage and achieve the ideal screening effect.

3.After the fine screen mesh cloth is well packed, leave 2 centimeters of extra mesh cloth around, then cut off the rest of them.

4. Reput the clamp between the two screen frame, tap the clamp by soft rubber hammer while tight it ,thus the bolt will be more tight. Till now the whole screen mesh cloth replacement is finished.
Note: when feeding the rotary vibrating screen, please do remember material feeding must be well-proportioned and don not feed too much material one time, otherwise it will not only affect the screening effect but also will shorten the service life of the rotary vibrating screen.

Belt Conveyors for Steel Project are Ready for Delivery

Content of project construction: 580 cubic meters of blast furnace and 120 square meters of sintering project.

On 3th June 2015,belt conveyors designed for Vietnam Hefa Phase III 70 thousand tons of steel project are ready for delivery. For this project, PK Machinery provides 38 units of belt conveyors and we are also in charged for belt conveyor engineering design, drawing delivery, fabrication ,equipment delivery and send installation personnel to site. We are sure this will lead a big step and build a solid foundation in metallurgical market!

PK Machinery is mainly engaged in manufacturing belt conveyor,bucket elevator,screw conveyor, vibrating screenetc. applied to different industries .With rich design experience and professional service ,we are sure PK Machinery is the best choice !

Installation and operation notes of rotary valve

Rotary valve is also known as discharge valve, it is mainly is used in power plants, cement plants, chemical plants etc. and dust removal industry, packing machine and professional mixing & conveying systems. Rotary valve is used for quantitative feeding and air lock when conveying dry powder material. It can also used for the lower hopper of dust collector and air preheater. It is an ideal accessory in conveying, discharging and dosing system  due to simple structure, stable performance and easy maintenance.

  

Installation notes

 1. The rotary valve must be kept clean, especially the inner body of main casing .

2.Check all fasteners to ensure the connection is reliable, the machine (including motor) is well earth grounded.

3. The upper and lower flange under of rotary valve must be fixed firmly, to make the whole machine placed inhorizontality at the same time

4.Check the wiring of motor to ensure it is able to start.

 Operation notes

 1.Pay attention that if motor is over heat when start up the power supply ,you must stop and inspect it, so as not to affect normal operation of the gearmotor.

2.Gearmotor must be operated as per the operating manual and the gearmotor rotating direction must rotate as per the arrow direction as shown.

3.If powder leakage phenomenon is found on the shaft, please tighten the packing gland bolts at both ends.

4.During operation , check  heating circumstance of bearing, general bearing temperature rising shall not be over 60 ℃.

5.During operation, if you find abnormal vibration, please stop the machine and exclude the abnormal phenomenon.

6.If there is bolt looseness in the process of operation, please tighten the bolt.

                                                               

Trial Run of Linear Vibrating Screen

When finished the installation of linear vibrating screen, check the fastening situation of bolts, and the relative positions of inlet, outlet and upper ,lower processing equipment to ensure no crash.

(1)Confirm the electric wiring is well connected.
 

(2)Trial run should go ahead about 8 hours, and check all parameters of screen in operation according to the technical requirements. Such as whether the amplitude is reach specified value, amplitudes on corresponding points of screen box are conform, and the deviation should not exceed 1-2mm, and the voice should be lower than 85dB. When trial run in 4 hours, temperature of bearing is rising, and keep balance. In general, temperature of bearing shouldn’t be higher than 40℃, if there is a highly rising of the temperature, stop the machine and find reason. After trial run 4 hours, stop the machine and check all tightening bolts. If the trial run is normal, and can confirm the installation of linear vibrating screen is qualified.

(3)Increasing the feeding volume gradually when the machine is came into use, and checking the screening effect. If it is good, increasing feeding volume continuously until reach the rated output. When the machine is produced well, the exciting force is not the biggest, if the amplitude reduces in trial run and the screening effect is not good, take the shields apart, which are in the two sides of motor, increase the contact ratio of two eccentric blocks to increase the power. Ensure the contact ratios of two eccentric blocks are totally conform.

Belt Conveyors And Vibrating Screens Are Ready For Delivery

On 29th May, linear vibrating screens, rotary vibrating screens and belt conveyors ordered by our Thailand client are ready for delivery. The screens are used for drying sand screening line, the belt conveyors with length 5m,9m,11m are used for feeding materials to the screens.

 

We are sure client will be satisfied with our products and we do believe we can establish long-term business relationship and redound to our mutual benefit!

 

 

PK Machinery offer the widest range of belt conveyor, bucket elevator, screw conveyor, vibrating screen etc. applied to different industries .With rich design experience and professional service ,we are sure PK Machinery is the best choice !Welcome to contact us if you are interest in our products:

 

 

 Website:www.pkmachinery.com

E-mail:  info@pkmachinery.com

 Tel:  +86 373 579 9188

 Fax: +86 373 507 1699

Address:  289 Yellow River Road, Xinxiang City, Henan Province, China