阅读说明：本技术 一种环式刨片机的叶轮 (Impeller of ring type flaker ) 是由 田佩彬 王宝金 于 2020-05-11 设计创作，主要内容包括：本发明公开了一种环式刨片机的叶轮,包括轮壳、叶片以及螺栓,所述轮壳由轮环、轮板、轴套、锥衬和多个叶板焊接而成,叶板沿轮环周向均匀排布,叶板的两侧分别与轮环、轮板焊接,任一叶板在叶轮的轴向上的投影呈弯曲形状,叶板由圆弧板和直板组合而成,其中叶板的直板部分呈径向辐射状排列,圆弧板部分的圆弧内侧顺着叶轮旋转的方向。该结构的有益效果在于,叶轮的空气动力特性得到优化,降低了叶轮高速旋转时对气流的搅动效应,降低了高速旋转叶轮中空气的空气动力学噪声,降低了运行能耗；优化了进料木片在叶轮中的运动轨迹,减少了木片贴在叶板上滑动时的摩擦,减少了叶板磨损,减少了木片被叶板打碎的情况,提升了叶轮进给木片的效率。(The invention discloses an impeller of a ring type flaker, which comprises an impeller shell, blades and bolts, wherein the impeller shell is formed by welding an impeller ring, an impeller plate, a shaft sleeve, a conical lining and a plurality of blades, the blades are uniformly distributed along the circumferential direction of the impeller ring, two sides of each blade are respectively welded with the impeller ring and the impeller plate, the projection of any blade in the axial direction of the impeller is in a bent shape, each blade is formed by combining an arc plate and a straight plate, the straight plate parts of the blades are radially arranged, and the inner sides of arcs of the arc plate parts are along the rotating direction of the impeller. The structure has the advantages that the aerodynamic characteristics of the impeller are optimized, the stirring effect of the impeller on air flow during high-speed rotation is reduced, the aerodynamic noise of air in the impeller rotating at high speed is reduced, and the operation energy consumption is reduced; the movement track of the feeding wood chips in the impeller is optimized, the friction of the wood chips when the wood chips are attached to the blade plates and slide is reduced, the abrasion of the blade plates is reduced, the situation that the wood chips are broken by the blade plates is reduced, and the efficiency of feeding the wood chips by the impeller is improved.)

1. The impeller of the ring-type flaker comprises an impeller shell, blades (3) and bolts (1), wherein the impeller shell is formed by welding an impeller ring (4), an impeller plate (5), a shaft sleeve (6), a conical lining (7) and a plurality of blades (2), the blades (2) are uniformly distributed along the circumferential direction of the impeller ring, and two sides of each blade (2) are respectively welded with the impeller ring (4) and the impeller plate (5), and the impeller flaker is characterized in that the axial projection of any blade (2) on the impeller (8) is in a bent shape and is formed by combining an arc plate and a straight plate, the straight plate parts of the blades (2) are radially and radially arranged, and form an included angle of β with the impeller (8) in the chordal direction for installing the blades (3), the arc inner sides of the arc plate parts of the blades (2) are along the rotating direction of the impeller (8), and the arc plate parts are arranged in the axial direction of the impeller (8)The projection radius is R, one end of the arc plate close to the knife ring (9) is tangent to the straight plate part of the blade (3) installed on the blade plate (2), the included angle between the tangent line of the tail end of the arc plate facing the axis of the impeller (8) and the chordal tangent direction of the impeller (8) is α, and the radius R of the arc plate meets the formulaH is the total height of the blade plate, and H is the height of the straight plate part of the blade plate for mounting the blade.

2. The impeller of a ring flaker as claimed in claim 1 wherein the included angle α satisfies 20 ° < α < 45 °.

3. The impeller of claim 1, wherein the included angle α is 36 °.

4. The impeller of the ring flaker as claimed in claim 1, wherein the included angle β is 90 °.

Technical Field

The invention relates to the technical field of wood shaving preparation, in particular to an impeller of a ring type chipper.

Background

A ring-type flaker is one of main machines for preparing wood shavings in shaving board production, an impeller of the ring-type flaker plays an important role in the whole feeding and cutting feeding system, and mainly comprises ①, an impeller rotates to generate airflow to form negative pressure in a weight separator, the wood shavings are sucked into a cutting chamber to play a role in airflow auxiliary feeding, ②, the wood shavings entering the high-speed rotating impeller are forced to rotate to do centrifugal motion and are radially thrown to a cutter ring to play a feeding role, ③, in a planing mechanism formed by the ring-type flaker impeller and the cutter ring, the impeller forces the wood shavings to rotate to do centrifugal motion, the generated centrifugal force gives pressure to the wood shavings clinging to the inner wall of the cutter ring, and meanwhile, the blades support the wood shavings to play a role of a bottom cutter in planing.

However, the impeller on the existing ring flaker generally adopts a radial straight plate type vane plate structure, although the impeller is simple in structural design and convenient to maintain, under the working state of high-speed rotation movement, ① is not optimized through aerodynamic characteristics, air in a cutting chamber is greatly stirred when the straight plate type vane plate rotates at a high speed, aerodynamic noise is easily increased, energy consumption is increased, ② in the process that the impeller of the radial straight plate type vane plate structure conveys wood chips to a knife ring through centrifugal action, the wood chips are always attached to the vane plate to slide, conveying efficiency is low, the vane plate is easy to wear, and when ③ straight plate type vane plates and blades force the wood chips in the impeller to rotate, the wood chips are easily broken by the vane plate, and meanwhile, the energy consumption is also increased.

Disclosure of Invention

In order to solve the problems of poor aerodynamic characteristics, low wood chip feeding efficiency, easy abrasion of the blade plate, high energy consumption and the like of the annular flaker adopting the radial straight plate type blade plate structure, the invention provides the annular flaker impeller with the blade plate formed by combining the arc plate and the straight plate.

In order to achieve the purpose, the invention adopts the following technical scheme.

An impeller of a ring type flaker comprises a wheel shell, blades and bolts, wherein the wheel shell is formed by welding a wheel ring, a wheel plate, a shaft sleeve, a conical lining and a plurality of blades, the blades are uniformly distributed along the circumferential direction of the wheel ring, and two sides of each blade are respectively welded with the wheel ring and the wheel plateThe included angle between the tangent line of the impeller and the tangential direction of the impeller is α, and the radius R of the circular arc plate satisfies the formulaH is the total height of the blade plate, and H is the height of the straight plate part of the blade plate for mounting the blade.

The structure has the advantages that the blade plate formed by combining the arc plate and the straight plate is more beneficial to the flow of gas-solid two-phase flow in the high-speed rotating impeller than the straight plate blade plate, so that the aerodynamic characteristics of the impeller are optimized, the stirring effect of the impeller on the gas flow during high-speed rotation is reduced, the aerodynamic noise generated in the process of rotating the impeller at high speed is reduced, and the operation energy consumption is reduced; the movement track of the feeding wood chips in the impeller is optimized, the friction when the wood chips are attached to the blade plates to slide is reduced, the abrasion of the blade plates is reduced, and the efficiency of feeding the wood chips by the impeller is improved; the situation that the wood chips are broken by the leaf plates is reduced. The part of the top end of the blade plate for installing the blade is kept in a straight plate structure, so that the straight plate type blade can be tightly and firmly installed on the blade plate through a bolt.

As a further improvement, the included angle α is more than 20 degrees and less than α and less than 45 degrees, and the structure has the beneficial effects that the included angle α is not too small, and the wood chips can smoothly enter the impeller.

As a further improvement, the included angle α is 36 °.

As a further improvement, the included angle β is 90 degrees, and the structure has the advantages that the straight plate parts at the top ends of the blades are radially arranged, so that the blades are perpendicular to the chordal cutting direction of the impeller, and the blades can normally support the wood chips to plane on the cutter ring.

In conclusion, the beneficial effects of the invention are as follows: the ring-type flaker impeller with the blades formed by combining the arc plates and the straight plates solves the problems that the prior radial straight plate type impeller generally adopted is poor in aerodynamic characteristics, low in efficiency of centrifugally conveying wood chips, easy to wear the blades, high in energy consumption and the like, reduces noise, operation energy consumption and blade abrasion, reduces the condition that the wood chips are broken by the blades, and improves the efficiency of feeding the wood chips by the impeller.

Drawings

Fig. 1 is a perspective view of the impeller of the present invention.

Fig. 2 is a perspective view of the impeller of the present invention assembled with a cutter ring.

Fig. 3 is a front view of the impeller of the present invention.

Fig. 4 is a left side view of the impeller of the present invention.

FIG. 5 is a sectional view A-A of the front view of the impeller of the present invention

Fig. 6 is a perspective view of the impeller vane and blade of the present invention.

Fig. 7 is a left side view of the impeller vane and blade of the present invention.

The reference numbers of the bolt 1, the vane plate 2, the vane plate 3, the vane ring 4, the vane plate 5, the shaft sleeve 6, the cone liner 7, the impeller 8, the cutter ring 9, the cutter ring α, the included angle between the tangent line of the tail end of the arc plate of the vane plate and the tangential direction of the impeller chord, the included angle between the straight plate at the top end of the vane plate β and the tangential direction of the impeller chord, the arc radius of the arc plate of the R-vane plate projected in the axial direction of the impeller, the total height of the H-vane plate and the height of the straight plate part of the H-vane plate installation vane.

Detailed Description

The technical solutions in the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

As shown in fig. 1, fig. 2, fig. 3, fig. 4, fig. 5, fig. 6 and fig. 7, an impeller of a ring flaker comprises an impeller shell, blades 3 and a bolt 1, wherein the impeller shell is formed by welding an impeller ring 4, an impeller plate 5, a shaft sleeve 6, a conical liner 7 and a plurality of blades 2, the blades 2 are uniformly arranged along the circumferential direction of the impeller ring 4, and two sides of each blade 2 are respectively welded with the impeller ring 4 and the impeller plate 5, and the impeller flaker is characterized in that any blade 2 is in a curved shape in the axial projection of an impeller 8 and is formed by combining an arc plate and a straight plate, the straight plate parts of the blades 2 are radially arranged and form an included angle of β with the tangential direction of the impeller 8, and is used for forming an included angle of 89Installing the blade 3, wherein the arc inner side of the arc plate part of the blade plate 2 is along the rotating direction of the impeller 8, the axial projection radius of the arc plate part on the impeller 8 is R, one end of the arc plate close to the knife ring 9 is tangent to the straight plate part of the blade 2 for installing the blade 3, the included angle between the tangent line of the tail end of the arc plate facing the axis of the impeller 8 and the tangential direction of the impeller 8 is α, and the radius R of the arc plate meets the formulaH is the total height of the blade plate 2, and H is the height of the straight plate part of the blade plate 2 for installing the blade 3.

When H is 200mm, H is 50mm,

the structure has the advantages that the blade plate 2 formed by combining the arc plate and the straight plate is more beneficial to the flow of gas-solid two-phase flow in the high-speed rotating impeller 8 than the straight plate type blade plate, so that the aerodynamic characteristics of the impeller 8 are optimized, the stirring effect of the impeller 8 on the gas flow during high-speed rotation is reduced, the aerodynamic noise in the high-speed rotating impeller 8 is reduced, and the operation energy consumption is reduced; the movement track of the feeding wood chips in the impeller 8 is optimized, the friction when the wood chips cling to the blade plates 2 and slide is reduced, the abrasion of the blade plates 2 is reduced, and the efficiency of the impeller 8 for feeding the wood chips is improved; the situation that the wood chips are broken by the leaf plates 2 is reduced.

As shown in fig. 5, 6 and 7, the included angle α satisfies 20 ° < α < 45 °, and the structure has the advantage that the included angle α is not too small, so that the wood chips can smoothly enter the impeller 8.

As shown in fig. 5, 6 and 7, α is 36 °, and when H is 200mm and H is 50mm, R is 185.41 mm.

As shown in fig. 5, 6 and 7, the included angle β is 90 °, which has the advantages that the part of the top end of the blade plate 2 where the blade 3 is installed is maintained in a straight plate structure, so that the blade 3 in the straight plate type can be tightly and firmly installed on the blade plate 2 by the bolt 1, and the top end of the blade plate 2 is maintained perpendicular to the chordal direction of the impeller 8, so that the blade 3 can normally support wood chips to be planed on the knife ring 9.

The invention has the beneficial effects that: the ring-type flaker impeller with the blades formed by combining the arc plates and the straight plates solves the problems that the impeller with a radial straight plate type blade plate structure which is commonly adopted at present is poor in aerodynamic characteristics, low in efficiency of centrifugally conveying wood chips, easy to wear the blades, high in energy consumption and the like, reduces noise, operation energy consumption and blade plate wear, reduces the situation that the wood chips are broken by the blade plates, and improves the efficiency of feeding the wood chips by the impeller.

It should also be noted that, in this document, the term "comprises/comprising" or any other variation thereof is intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.