Method for testing pulping specific pressure value of high concentration pulping machine
A high-consistency refiner and beating specific pressure technology, which is applied in pulp beating methods, measuring devices, force/torque/power measuring instruments, etc., can solve the problem of power grid voltage fluctuation, current value and specific pressure value cannot be converted, impact and other issues, to achieve good specifications, good beating process, and improve the effect of beating quality
Inactive Publication Date: 2011-05-04
SHANGHAI TOBACCO GRP CO LTD +1
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Problems solved by technology
[0010] 1. After all, what is measured by the current method is the current rather than the specific pressure, and the current value and the specific pressure value cannot be converted.
[0011] 2. There are many factors that affect the current, some of which are not directly related to the specific pressure, such as mechanical loss, the efficiency decrease of the motor itself, and the fluctuation of the grid voltage, etc. will all affect the current value
Method used
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Embodiment Construction
[0025] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.
[0026] figure 1 Shown is a structural diagram of a certain type of high-consistency refiner in Xi'an Paper Mill. The diameter of the disc mill is 750mm, and the adjustment range of the disc-grinding gap is -10 to +15mm. The refiner consists of feed hopper 1, feed screw propeller 6, fixed cutter disc 2, flying cutter disc 3, discharge hopper 7, damping spring 4, grating scale 8, worm gear gap adjustment device 5, reduction gear box 11 , manual gap adjustment handle 9, and electric gap adjustment encoder 10. In order to facilitate measurement, an encoder 10 is installed on this high-consistency refiner, and at the same time, the electronic control PLC is replaced by AB company electric control PLC for the convenience of calculation and processing. .
[0027] The method for measuring the beating specific pressure value of the present invention: firstly m...
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The invention discloses a method for testing the pulping specific pressure value of a high concentration pulping machine. The method comprises the following steps of: firstly, measuring the compression stroke of a damping spring acting on a fly cutter; secondly, calculating the axle pressure value of the fly cutter according to the compression stroke and the elastic coefficient of the spring so as to obtain the pressure of the fly cutter acting on a bottom cutter; and lastly, calculating the pulping specific pressure value according to the axial pressure value of the fly cutter and the cross section of the fly cutter. The compression stroke of a pressure-relief spring is tested, so that the pulping specific pressure value can be calculated directly and correctly, the defects existing in the conventional method for indirectly obtaining a specific pressure relative value by using the current of a motor are overcome, a pulping process can be standardized well and pulping quality is enhanced.
Description
technical field [0001] The invention belongs to the technical field of papermaking machinery, in particular to a method for measuring the beating specific pressure value of a high-consistency refiner. Background technique [0002] There are many factors affecting beating, such as beating specific pressure, beating time, paper concentration, paper properties, distance between knives, characteristics of knives, beating temperature, paper PH value, and materials added during beating, etc. are enough to affect beating. The beating specific pressure is the primary factor that determines the beating method. That is to say, whether the beating belongs to the category of free beating or viscous beating, the prerequisite is the beating specific pressure. Correct determination of specific pressure is also the key to shorten beating time, improve paper quality and save power consumption. [0003] In general, reducing the beating specific pressure can avoid cutting fibers too much, bu...
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Inventor 任俊杰陆正凯何军李新生
Owner SHANGHAI TOBACCO GRP CO LTD