The difference between no-load test and on-load test of jaw crusher

Product introduction:https://www.lvssn.com/crusher/Jaw-crusher.html

Jaw crusher is an important crushing equipment in stone production line. Its main characteristic is large crushing ratio. Therefore, most stone production lines use jaw crusher for coarse crushing.For the newly purchased jaw crusher needs to be tested first and tested without fault before it can be put into production.The difference between no-load test and on-load test of jaw crusher.

 

1. No-load test of jaw crusher

 

The purpose of "no-load test" is to adjust the machine to the best state. The process is as follows:

(1) during no-load test, the jaw crusher shall operate continuously for 2h, and the temperature rise of the bearing shall not exceed 30℃;

(2) during the test run, all fasteners of the jaw crusher should be firm without loosening;

(3) whether the flywheel and groove wheel operate smoothly;

(4) during the test run, the jaw crusher should reach the point where there is no abrasion, chip dropping and grinding of all friction parts, and there is no normal sound;

 

The adjustment device of the discharge port of jaw crusher should ensure the adjustment range of the discharge port.
 

2. The jaw crusher has load test

 

The purpose of "on-load test run" is to observe whether the broken materials meet the standards and pave the way for the follow-up continuous production.The specific process is as follows:

 

(1) during on-load test, the jaw crusher shall not have periodic or significant impact or impact sound;

(2) the maximum feeding particle size shall conform to the design regulations;

(3) continuous operation for 8h, bearing temperature rise shall not exceed 30℃, temperature shall not exceed 70℃;

(4) the processing capacity and product size of jaw crusher should meet the design requirements;

(5) there is no obvious movement between the adjustment seat and the rack ear seat.

The test run can not only test the performance of jaw crusher but also prevent the occurrence of various minor faults in production.If the machine fails to meet the specified standard during no-load test or on-load test, it means that the machine is not up to the standard, and professional technical personnel should be asked to debug the machine again until it meets the standard.

The page source:https://www.lvssn.com/Product/The-difference-between-no-load-test-and-on-load-test-of-jaw-crusher.html

How much do you know about the adjustment and operation of vertical mill limiter?

Product introduction:https://www.cementepc.net/grinding/LVRM-Vertical-Mill.html

Vertical mill is a set of drying, grinding, powder selection and conveying in one of the powder equipment, because of its small area and favored by users.However, many people complained that after the equipment was used for a period of time, it did not operate correctly, which affected the production and directly affected the economic benefits.How much do you know about the adjustment and operation of vertical mill limiter?

1. Operation rules of vertical mill

(1) wear good labor insurance products.

(2) maintenance of the vertical mill requires two people to go together, keep in touch with the central control at all times, and leave special personnel outside the vertical mill for safety monitoring.

(3) low pressure lighting must be used before entering the vertical mill.

(4) before entering the vertical mill, cut off the power supply of the main motor of the vertical mill, the feeding equipment of the exhaust fan and the powder separator, and drive the field control box to the "maintenance" position.

(5) when replacing the lining plate and parts of grinding roller, pay attention to prevent collision and injury, and take safety protection measures.

(6) when working at height, the operator should first ensure that the tools are in good order and fasten the safety belt.

(7) when the inspection of vertical mill must be carried out during the operation of the large kiln, safety precautions should be taken, close contact should be maintained with the central control, and special persons should be arranged to take charge of safety work. At the same time, the high-temperature fan at the end of the kiln should be increased to extract air, the hot windshield at the entrance of the mill should be closed and power off, and the negative pressure of the system should be ensured to be stable.

(8) confirm that the grinding body has been fully cooled, and verify the depth and temperature of ash accumulation in the vertical mill. If the grinding body is overheated, there is no exhaust air, and ash accumulation is too much, it is strictly prohibited to enter the mill. At the same time, it is necessary to pay attention to whether there is material accumulation in the feeding slide, so as to avoid slipping and injuring people.

(9) complete the procedures for power failure in accordance with relevant regulations.
 

2. How to adjust the limit of vertical mill

 

The adjustment method is:

Make the grinding roller directly contact with the grinding disc, then turn the limit bolt to make it contact with the elastic head.At this time, lift the grinding roller with a pressure device, and turn the limit bolt in the direction of the elastic head for about two turns again (make the distance between the grinding roller and the grinding disc about 5mm). Finally, tighten the upper nut of the limit bolt under the condition of keeping the limit bolt still, to prevent the limit bolt from loosening when the vertical mill is running.The limit device should be adjusted according to the above method.After the vertical mill runs for a period of time, due to the wear of roller sleeve and lining plate, the limit device should be adjusted appropriately.

The page source:https://www.cementepc.net/Industry/How-much-do-you-know-about-the-adjustment-and-operation-of-vertical-mill-limiter.html