CN205684090U - Energy-efficient raw grain decortication de-embryo polishing screening multiple purpose aeroplane - Google Patents

Abstract

Energy-efficient raw grain decortication de-embryo polishing screening multiple purpose aeroplane, relate to raw grain decortication de-embryo polishing screening machinery, feed hopper under shed leads to decortication room, and main shaft is horizontally set on the end plate of decortication room by bearing, and the belt pulley that main shaft outer end is fixed connects motor power by belt takes turns；Being provided with transfer roller on main shaft, transfer roller is placed in screen cloth；Decortication outdoor is provided with air channel, and connecting fan is held to the greatest extent in air channel；Described transfer roller is polygonized structure, polygonal every on be provided with spring blade, spring blade is suppressed fixing by helical feed pressing plate, and transfer roller and spring blade coordinate with screen cloth to be rubbed material；Helical blade on helical feed pressing plate forwards pushes away material simultaneously；Screen cloth front connects large aperture screen cloth；Screen cloth front, large aperture is feed opening；Gland and regulation device thereof it is provided with at feed opening.The beneficial effects of the utility model are: power is little, and yield is high, and quality is high, and percentage of damage is low, and production cost is low, has significant economic and social benefit.

Description

Energy-efficient raw grain decortication de-embryo polishing screening multiple purpose aeroplane

Technical field

This utility model relates to machinery, is Cereals Processing Machines further, the especially decortication such as Semen Maydis, rice, buffing machine.

Background technology

Husk rice, is that the method for Applied Physics (mechanical) or chemistry is by the skin portion on raw grain surface or the work that all divests Sequence.At present, the commonly used physical method in countries in the world husk rice.For remove the plant equipment of raw grain cortex be referred to as rice mill (or Being referred to as disintegrating machine of peeling, its purposes is Semen Maydis, Semen Tritici aestivi, Oryza glutinosa (brown rice) etc. to be removed the peel).Due to the raw grain cortex such as Semen Maydis, Semen Tritici aestivi Tissue has more crude fibre, directly edible normal stool and the absorption that can hinder human body, meanwhile, the water absorption of belt leather raw grain and Dilatancy is the most poor, and edible quality is the best, and time required during steaming and decocting is longer, and ripe rice rate is low, and color is deep, stickiness Difference, mouthfeel is bad, the most often needs to be removed by the cortex of raw grain by husk rice operation so that it is have excellent edible quality, carry Its commodity value high.

All the time, due to the restriction of technical merit, China's grain processing enterprise all extensive style develop, in the course of processing, Foodstuff waste is serious, and power consumption is the biggest.Rice mill of the prior art, is divided into two kinds, one, and rub pearling, i.e. with friction Frictional action is main, is also called pressing rice polisher, and i.e. use roller is the most rigid with sieve rubs peeling, owing to the grain of rice is in pearling The indoor pressure born is relatively big, and pressure is often beyond the intensity of raw grain grain, therefore in rice milling process, easily produces and crack rice.Its Two, grind and cut pearling, i.e. speedy rice polisher, it is mainly hard by the emery grit adjusting the corundum roller surface rotated intensive Sharp keen sand cutter, is continuously applied to abrasive action to raw grain grain cortex, makes cortical lacerations come off, so that raw grain grain obtains pearling. In sum, both the above belongs to hard processing mode, and the gap between roller and screen cloth can not adjust, and pearling efficiency is low, When internal pressure do not reach need time, only by discharging opening pressure top regulate, so, radially whitening chamber pressure is irregular, thus produce Percentage of damage is high, and the fine powder that raw grain grain produces after crushing directly is siphoned away by screen cloth by blower fan, therefore yield rate is low, waste serious.

Sum it up, all use rigid kneader type principle due to prior art construction, so generally there is following defect: 1, power is big, it is generally required to the power of 15kW to 45kW, the most every kW production capacity only has 50-90 kilogram per hour；2, yield poorly, Generally 500-3000 kilogram per hour；3, percentage of damage is high, and percentage of damage is generally at more than 50-60%；And grain after broken is usual It is taken as feedstuff to use, makes product cost promote.4, rough surface, aesthetic finish is poor, affects the sale of product；Especially speed Degree type rice mill, often haves no alternative but need to coordinate buffing machine to use；5, consumables cost is high, and consumptive material is iron roll or sand roller, its cost High.

Bread is the staff of life, and China is the first in the world populous nation, and grain is closely bound up with the people's livelihood, and the yield of grain and matter Magnitude relation, to nation's security, is related to stablizing of society.And the existence of these defects of rice mill causes grain in prior art Food waste, waste of energy, production capacity are low.Not only grain processing enterprise becomes small profits enterprise, survives the difficultest, can not get quickly sending out Exhibition, and have influence on national food supply security to a certain extent.

Summary of the invention

The purpose of this utility model is to overcome the defect of above-mentioned prior art, it is provided that the decortication of a kind of energy-efficient raw grain is de- Embryo polishing screening multiple purpose aeroplane, with flexible husk rice as theory, its required drive is little, and raw grain percentage of damage is low, is remarkably improved operation effect Rate, reduction production cost；Meanwhile, adjust the machine, multipurpose can be realized.

The purpose of this utility model is realized by below scheme:

Energy-efficient raw grain decortication de-embryo polishing screening multiple purpose aeroplane, including casing, feed hopper, decortication room, induced-draught fan, electronic Machine, feed hopper under shed leads to decortication room, and decortication room is that tubbiness is laterally disposed, and main shaft is horizontally set at decortication room end by bearing On plate, the belt pulley that main shaft outer end is fixed connects motor power by belt takes turns；Being provided with transfer roller on main shaft, transfer roller is placed in sieve In net；The composition of decortication room includes that screen cloth, transfer roller, decortication outdoor are provided with air channel, and connecting fan is held to the greatest extent in air channel；Its feature exists In: described transfer roller is polygonized structure, polygonal every on be provided with spring blade, spring blade is helical feed pressing plate Being suppressed fixing, transfer roller and spring blade coordinate with screen cloth to be rubbed material；Helical blade on helical feed pressing plate is same Time forwards push away material；Screen cloth front connects large aperture screen cloth (for aperture is greatly relative screen cloth), had both ensured and has not leaked through thing Material, can discharge again area bigger light materials such as skin of Semen Maydis；Screen cloth front, large aperture is feed opening, is used for discharging processing After material；Gland and regulation device thereof it is provided with at feed opening.

This utility model also can be realized by below scheme further:

Described spring blade is whole piece steel disc, and steel disc front portion has some cuttves seam, and steel disc rear portion is provided with strip and connects Hole.

The cutter seam direction of described spring blade is consistent with the incline direction of helical blade on helical feed pressing plate.

Described main shaft is hollow axle construction with holes.

Shape is the most gradually opened in described air channel.

Described screen cloth is that a monolithic annulus stacks together, outside by outer keel fixed plate fixed grit, outer keel fixed plate It is arranged on three the most equally distributed location leading screws；2/3 part of outer keel fixed plate connects for fixing, and outer keel is solid 1/3 part determining plate is activity fixed plate, and activity fixed plate is divided into two parts, and one end of every part connects positioning filament by loose-leaf Thick stick, the other end is screwed after being interlocked.

Bottom, described air channel, for inhaling skin room, is horizontally arranged with out skin auger inhaling skin indoor, inhales skin room 27 end connection and inhales Wind bucket, air draught bucket connecting fan, foreign material are discharged in exit.

Described regulation device finger pressure door-hinge activity is fixed on discharge end end cap, and gland is fixed with pressure gate axle, at pressure gate axle The lower section at two ends, is provided with pressure top bar, and pressure top bar arranges pressure top and pressure top locking nut, by regulation pressure top locking nut, The controlled speed making material thus adjust material decortication room pressure.

The beneficial effects of the utility model are: 1, power is little, only use 4-7.5kW；Every kW production capacity reaches the number of prior art Even more than 10 times again.2, yield is high, and a hourly output can reach 5 tons.3, quality is high, and percentage of damage is low, percentage of damage only 2%；And it is de- Product after skin is complete, glossy.4, production cost is low, spring leaf only 10 yuan, screen cloth only 25 meters/unit, and prior art In consumptive material be iron roll or sand roller, this utility model consumables cost is only the 1/3-1/5 of prior art.5, easy to maintenance, to easily Damage the replacing of part, it is only necessary to 10 minutes, man-hour was the 1/2-1/10 of prior art.5, structure or the subelement of the machine are adjusted, can Realize the decortication of raw grain, de-embryo, polish, screening etc., be a tractor serves several purposes, compare prior art, multiple operation frock can be saved Equipment, both can reduce investment outlay, and can save man-hour again；6, wide adaptability, by changing simply and regulating, the machine is applicable to jade The process requirements of the various crop raw grains such as rice, rice, Semen Tritici aestivi, Semen setariae, therefore can meet different operation needs.Thus generally Say that use of the present utility model saves the energy, improves production capacity, reduces production cost, have the most economical and social Benefit.

In order to make those skilled in the art be more fully understood that this utility model scheme, and make above-mentioned mesh of the present utility model , feature and advantage can become apparent from understandable, below in conjunction with embodiment, this utility model is described in further detail.

Accompanying drawing explanation

Fig. 1 is this utility model main TV structure schematic diagram, and Fig. 2 is this utility model decortication room enlarged diagram, and Fig. 3 is this Utility model left view (Figure 1A to) structural representation, Fig. 4 is that this utility model overlooks (Figure 1B to) structural representation, and Fig. 5 be Utility model backsight structural representation, Fig. 6 is this utility model switchblade chip architecture schematic diagram, and Fig. 7 is this utility model spiral Delivery pressure plate structural representation, Fig. 8 is this utility model screen cloth buckling device structural representation.

In figure: maintenance door 1, location leading screw 2, feed hopper 3, upper cover 4, motor 5, screen cloth 6, angle bar 7, spring blade 8, interior Hone lamella 9, blower fan connector 10, motor connecting plate 11, feed opening 12, discharge end polygon iron roll end plate 14, discharge end scalping Net 15, decortication room 16, outer keel fixed plate 17, discharge end polygon iron roll end plate 18, feed end end cap 20, main shaft 21, belt Wheel 23, decortication room end plate 24, air draught bucket 26, suction skin room 27, suction skin room air inlet 28, blanking raise plate 29, helical feed pressing plate admittedly Determine screw 30, helical feed pressing plate 31, hollow axis hole 32, helical blade 33, discharge chamber 34, discharge end end cap 36, feed space 38, Heart-shaped lifting hole(eyelet) 39, pressure gate axle center 40, pressure top bar 41, triangle lifting hole(eyelet) 42, discharging opening 43, pressure top 44, pressure top locking nut 45, gland 46, Os Draconis movable sleeve 47, go out skin packing auger blade 51, go out skin screw-conveyer-shaft 52, go out skin auger transmission fluted disc 53, go out skin auger bearing 54, go out skin auger motor 55, go out the straight motor cabinet of skin auger 56, charging adjustable plate 57, cutter seam 81, connecting hole 82.

Detailed description of the invention

As shown in figures 1-8, (with material traffic direction for front and back), the polishing screening of energy-efficient raw grain decortication de-embryo is multiplex Machine, including casing (including the end cap at two ends, i.e. feed end end cap 20, discharge end end cap 36), feed hopper 3, feed space 38, decortication Room 16, discharge chamber 34, motor 5, decortication is feed space 38 on the right side of room 16, and left side is discharge chamber 34, formed one complete enter, Take off, go out passage；Feed hopper 3 under shed leads to decortication room 16, is provided with main shaft 21 in decortication room 16, and main shaft 21 is horizontal by bearing Being arranged on the end plate of decortication room, the belt pulley 23 of main shaft 21 outer end connects motor power by belt takes turns；It is provided with on main shaft Transfer roller；The composition of decortication room includes screen cloth 6, transfer roller；Described transfer roller is polygonized structure, as generally used octagon, nine limits Shape, decagon, hendecagon or dodecagon structure, transfer roller is arranged at discharge end polygon iron roll end plate 14 and feed end is polygon Between shape iron roll end plate 18, transfer roller is provided with on each polygon edge endosteal lamella 9, endosteal lamella 9 is provided with spring blade 8 (arrow in Fig. 2 shows transfer roller and the direction of rotation of spring blade 8), spring blade 8 can be one or more layers；Switchblade Sheet 8 is suppressed fixing by helical feed pressing plate 31, and helical feed pressing plate 31 is provided with helical blade 33；From laterally, spiral Blade 33 links up Spiral distribution along transfer roller；From cross section, helical blade 33 forms the arc shape board (seeing Fig. 2) being interrupted, can Enough forwards (accompanying drawing 3 is shown as left side, specifically sees that the position of feed hopper and feed opening is arranged, lower same) promotes material, can protect again Barrier spring blade 8 coordinates with screen cloth 8 within the specific limits to be rubbed material；Decortication outdoor is provided with air channel, and air channel is held to the greatest extent It is provided with blower fan connector 10, for connecting fan；The general aperture of screen cloth 8(is 16-34 mesh, can be according to the need that specifically process raw material Select) left side connect have large aperture screen cloth (discharge end wide-meshed screen 15) (for large aperture is relative screen cloth 8, with the thing that do not leaks down Material is principle, and typically selecting aperture during processing Semen Maydis is 0.3 centimetre), for discharging the bigger light materials of area as beautiful Silverskin；It is discharging opening 43, feed opening 12 on the left of the screen cloth of large aperture, the material after discharging processing；It is provided with at feed opening 12 Gland 46 and regulation device thereof, described regulation device finger pressure door-hinge 40 activity is fixed on discharge end end cap 36, gland 46 and pressure Door-hinge 40 is fixed, and in the lower section at pressure gate axle 40 two ends, is provided with pressure top bar 41, and pressure top bar 41 arranges pressure top 44 and pressure top locking Nut 45, by regulation pressure top locking nut 45, the controlled speed making material thus adjust material decortication room pressure.

Arrange blanking at feed opening 12 raise plate 29 and inhale skin room air inlet 28, for when material falls, siphon away further Light weight sundries.

The cutter seam direction of described spring blade 8 is consistent with the incline direction of helical blade 33 on helical feed pressing plate 31.With Guarantee the smooth outflow of material.

Described main shaft is hollow axle construction with holes, i.e. arranges some hollow axis holes 32 on main shaft, it is simple to ventilate.

Shape is the most gradually opened in described air channel, to reduce the resistance of wind flow.

Bottom, described air channel, for inhaling skin room 27, is horizontally arranged with out skin auger in inhaling skin room 27, inhales skin room 27 end even Connecing air draught bucket 26, air draught bucket 26 connecting fan, foreign material are discharged in exit.The structure going out skin auger is: go out skin screw-conveyer-shaft 52 two ends It is fixed on decortication room end plate 24 by going out skin auger bearing 54, goes out and on skin screw-conveyer-shaft 52, be provided with out skin packing auger blade 51, go out It is provided with out skin auger transmission fluted disc 53 on skin screw-conveyer-shaft 52, goes out skin auger transmission fluted disc 53 and connect skin auger by chain The output shaft of motor 55, goes out skin auger motor 55 and is arranged at out on the straight motor cabinet of skin auger 56.

Described motor is placed on motor connecting plate 11, and four angles of motor connecting plate 11 arrange 4 oblique strip shapeds Fixing hole, the middle part of motor connecting plate 11 is motor shaft outlet hole, is also oblique strip shaped, the setting of oblique strip shaped fixing hole, it is simple to The tightness of the belt of regulation motor.

Angle bar 7 is used for fixing casing.

For the ease of regulation inlet amount, a charging adjustable plate 57 is set at feed hopper, by charging adjustable plate 57 Insert and take out, it is achieved the control to inlet amount.

For ease of lifting, movement and the maintenance of the machine, casing is provided with heart-shaped lifting hole(eyelet) 39, triangle lifting hole(eyelet) 42.

For ease of maintenance, it is provided with maintenance door 1.

As shown in Figure 6, this utility model switchblade chip architecture, described spring blade 8 is whole piece steel disc, and steel disc front portion is left Having some cuttves seam 81, steel disc rear portion is provided with strip connecting hole 82；Helical feed pressing plate fixed screw 30 penetrates strip even Connect hole 82, be fixed on endosteal lamella 9；Thus it is possible, on the one hand, the gap between spring blade 8 and screen cloth 6 is for regulating, it is ensured that right Material rub exfoliant effect；On the other hand, after spring blade mill is short, the use of spring blade can be extended by regulating Life-span.

As it is shown in fig. 7, this utility model screen cloth buckling device, screen cloth 6 is a monolithic, and annular stacks together, outside by outward Os Draconis fixed plate 17 fixed grit 6, outer keel fixed plate 17 is arranged on three the most equally distributed location leading screws 2, 2/3 part of outer keel fixed plate 17 connects for fixing, and 1/3 part of outer keel fixed plate 17 is activity fixed plate, is divided into two Part, one end connects location leading screw 2 by Os Draconis movable sleeve 47 loose-leaf shape, and the other end is screwed after being interlocked.Screen cloth 6, Spring blade 8 is the consumptive material in producing, although durable wear, but always has bad when.When needing repairing and change, removing can The upper cover 4 of dismounting.Exposing the outer keel fixed plate 17 of activity, remove fixed screw, screen cloth 6 can be opened under elastic reaction automatically Open.If adjusting spring blade 8, the screw on helical feed pressing plate 31 can be come loose, adjusting spring blade 8 and screen cloth 6 inwall Gap be 1 to 5 millimeter (depending on can be according to raw grain kind), then tighten and will fix screw.Change spring blade 8 same Reason.As changed screen cloth 6, can be clipped in below spring blade 8 by screen cloth 6, one hand rotates counterclockwise belt with feed end direction Wheel, screen cloth 6 is rolled out easily, the most convenient.Singlehanded belt pulley, screen cloth 6 quilt can be rotated clockwise with feed end direction during installation It is involved in easily.Then by screen cloth 6 with feed end direction suitable volume counterclockwise, the outer keel fixed plate 17 of tensioning function is shared, so After tighten the screw etc. in outer keel fixed plate 17 successively.

During installation, regulate three location leading screws 2, when machinery reaches requirement, then be welded and fixed, thus can easily realize peace Dress.

Due to spring blade self-pressure regulating structure, by part-structure or the adjustment of element, following effect can be produced:

The machine removes pressure top 44, is novel high-efficiency and energy-saving decortication buffing machine, and decortication polishing effect is more preferable.

The machine uses pressure top 44, removes blower fan, changes sieve number and is novel high-efficiency and energy-saving germ separator, because due to embryo Bud and the diversity of other tissue intensity, under spring blade flexibility effect, produce and separate, and de-embryo effect is more preferable.

The machine only changes sieve number and is novel high-efficiency and energy-saving screening machine.

The machine thickeies spring blade 8, changes sieve number and is novel high-efficiency and energy-saving wheat scourers.

The machine removes high pressure positive blower, at the hollow single-ended connecting fan air outlet of blocking of 21 mouthfuls of single-ended sealings of axle with holes, changes Sieve number is novel high-efficiency and energy-saving wheat-bran brushing machine.

During use, by dry raw grain after water-wet 15 minutes, in turn switch on blower fan and main frame, by raw grain from feed hopper 3 uniformly pour into.After raw grain enters feed space 38, to discharging opening 43 direction auger under the effect of helical blade 33.Due to Spring blade 8 is annealing spring blade, resilient enough, therefore when raw grain flows through spring blade 8, spring blade 8 can to raw grain to Screen cloth 6 applies pressure, makes raw grain and the abundant sliding friction of screen cloth 6.Owing to screen cloth 6 is spring steel wire screen cloth, in practice it has proved that, properly The spring establishment screen cloth of string diameter has extraordinary decortication polishing action to raw grain, and percentage of damage is extremely low.Raw grain peel quickly by Sliding friction wipe from.When raw grain flows through spring blade, spring blade 8 meeting is to raw grain rossing again, and spring blade 8 knife back light Sliding wear-resisting, the raw grain of contact there is is extraordinary polishing action.Along with raw grain continues to push ahead, the peel back of the body fully rubs repeatedly Polishing, it becomes smooth and glossy.Can produce bran powder in decortication polishing process, at this moment, strong negative pressure fresh air is through main shaft 21 Hollow axis hole 32 sprays, under the fan blade effect of high speed rotating spring blade 8, and bran pruinescence blowout screen cloth 6, enter and inhale skin room 27. Directly siphoned away through blower fan connector 10 by high pressure positive blower.When room 16 internal pressure of peeling is big, spring blade 8 meeting deflection is more Greatly.Thus prevent raw grain from crushing, after deforming because of spring blade 8 again, raw grain can advance in more forward discharge mouth 43 direction.Thus increase Yield, this Flexible Manufacture structure the lowest load reducing motor, therefore power saving effect is the most obvious.Decortication polishing process The great Pi of middle generation wears only screen cloth 6.When product after decortication polishing flows to discharge end wide-meshed screen 15, great Pi can pass through out Material end wide-meshed screen 15, enters suction skin room 27 and is siphoned away by high pressure positive blower through blower fan connector 10.And material may proceed to discharging opening 43 Direction advances, and finally flows through discharge end wide-meshed screen 15 and passes discharging opening 43, falls blanking and raise plate 29, at this moment contain not in material Have through screen cloth 6 and discharge end wide-meshed screen 15 skin bran can again by high pressure positive blower from inhaling skin room air inlet 28 through blower fan connector 10 siphon away completely.Whole operation can produce continuously.Host power supply, rear Blowing stopper power supply is first closed after machining.

The above, detailed description of the invention the most of the present utility model, but protection domain of the present utility model does not limit to In this, any those familiar with the art in the technical scope that this utility model discloses, the change that can readily occur in Change or replace, all should contain within protection domain of the present utility model.

Claims (8)

1. The most energy-efficient raw grain decortication de-embryo polishing screening multiple purpose aeroplane, including casing, feed hopper, decortication room, induced-draught fan, electronic Machine, feed hopper under shed leads to decortication room, and decortication room is that tubbiness is laterally disposed, and main shaft is horizontally set at decortication room end by bearing On plate, the belt pulley that main shaft outer end is fixed connects motor power by belt takes turns；Being provided with transfer roller on main shaft, transfer roller is placed in sieve In net；The composition of decortication room includes that screen cloth, transfer roller, decortication outdoor are provided with air channel, and connecting fan is held to the greatest extent in air channel；Its feature exists In: described transfer roller is polygonized structure, polygonal every on be provided with spring blade, spring blade is helical feed pressing plate Being suppressed fixing, transfer roller and spring blade coordinate with screen cloth to be rubbed material；Helical blade on helical feed pressing plate is same Time forwards push away material；Screen cloth front connects large aperture screen cloth；Screen cloth front, large aperture is feed opening；It is provided with at feed opening Gland and regulation device thereof.
2. Energy-efficient raw grain the most according to claim 1 decortication de-embryo polishing screening multiple purpose aeroplane, it is characterised in that: described bullet Spring blade is whole piece steel disc, and steel disc front portion has some cuttves seam, and steel disc rear portion is provided with strip connecting hole.
3. Energy-efficient raw grain the most according to claim 2 decortication de-embryo polishing screening multiple purpose aeroplane, it is characterised in that: described bullet The cutter seam direction of spring blade is consistent with the incline direction of helical blade on helical feed pressing plate.
4. Energy-efficient raw grain the most according to claim 1 decortication de-embryo polishing screening multiple purpose aeroplane, it is characterised in that: described master Axle is hollow axle construction with holes.
5. Energy-efficient raw grain the most according to claim 1 decortication de-embryo polishing screening multiple purpose aeroplane, it is characterised in that: described wind Shape is the most gradually opened in road.
6. Energy-efficient raw grain the most according to claim 1 decortication de-embryo polishing screening multiple purpose aeroplane, it is characterised in that: described sieve Net is that a monolithic annulus stacks together, outside by outer keel fixed plate fixed grit, and outer keel fixed plate is arranged on three along circle On the leading screw of all equally distributed location；2/3 part of outer keel fixed plate connects for fixing, 1/3 part of outer keel fixed plate For activity fixed plate, activity fixed plate is divided into two parts, and one end of every part connects location leading screw by loose-leaf, and the other end interlocks It is screwed after conjunction.
7. Energy-efficient raw grain the most according to claim 1 decortication de-embryo polishing screening multiple purpose aeroplane, it is characterised in that: described wind Bottom, road, for inhaling skin room, is horizontally arranged with out skin auger inhaling skin indoor, inhales skin room end and connects air draught bucket, and air draught bucket connects wind Machine.
8. Energy-efficient raw grain the most according to claim 1 decortication de-embryo polishing screening multiple purpose aeroplane, it is characterised in that: described tune Control device finger pressure door-hinge activity is fixed on discharge end end cap, and gland is fixed with pressure gate axle, in the lower section at pressure gate axle two ends, arranges There is pressure top bar, pressure top bar arranges pressure top and pressure top locking nut, by regulation pressure top locking nut, the controlled speed making material Spend thus adjust the material pressure in decortication room.