CN112248172B

CN112248172B - Sawdust wood chip pulverizer

Info

Publication number: CN112248172B
Application number: CN202011121242.8A
Authority: CN
Inventors: 戚珂
Original assignee: 淮北暴风工业设计有限公司
Current assignee: Huaibei Fengfeng Industrial Design Co ltd
Priority date: 2020-10-20
Filing date: 2020-10-20
Publication date: 2022-04-12
Anticipated expiration: 2040-10-20
Also published as: CN112248172A

Abstract

The invention relates to the technical field of crushing equipment and discloses a sawdust wood chip crusher which comprises a crushing cavity, wherein one end of a main shaft is movably installed with the output end of a motor, a blade is fixedly installed on the outer side of one end, close to the motor, of the main shaft, a fan is fixedly installed at one end, far away from the blade, of the main shaft, and a flow guide bulge is fixedly connected to one side, far away from the fan, of the blade. The blade is provided with the vent holes penetrating through the blade, so that the heat on the blade is taken away by flowing air, the effect of convection heat dissipation is realized, and the service life of the blade is effectively prolonged.

Description

Sawdust wood chip pulverizer

Technical Field

The invention relates to the technical field of crushing equipment, in particular to a sawdust wood chip crusher.

Background

The wood chip crusher cuts the surface of wood through the rotary blade, the fan rotates to generate high-speed airflow in the cutting process, the high-speed airflow drives wood chips to rotate, the rotation direction is around the cutting direction of the blade, materials are accelerated and repeatedly impacted in the airflow, the crushing effect is realized, the cutting and the collision are combined together, double crushing is realized, and the crushed materials enter the powder collector to be collected along with the airflow of the fan.

However, the general structure of the wood pulverizer is simple, the wood pulverizer does not have a speed reduction structure, the fan is directly connected to the rotating shaft of the blade, the fan always rotates along with the blade, the rotating speed of the high-speed airflow is the same as the speed of the blade, so when the fan drives materials to enter the powder collector, the generated suction force is always stable, in the process of cutting wood chips, part of the materials which are lighter in weight but do not reach the pulverizing standard are sucked into the powder collector due to the fact that the suction force of the fan is too large, the quality of the wood chips does not reach the standard, and the final pulverizing effect is affected.

Disclosure of Invention

Aiming at the defects of the existing sawdust wood chip pulverizer in the using process in the background technology, the invention provides the sawdust wood chip pulverizer which has the advantages of reducing suction force and improving pulverizing quality, and solves the problems in the background technology.

The invention provides the following technical scheme: the utility model provides a sawdust wood chip rubbing crusher, is including smashing the chamber, the one end of main shaft and the output movable mounting of motor, the one end outside fixed mounting that the main shaft is close to the motor has the blade, the one end fixed mounting that the blade was kept away from to the main shaft has the fan, it is protruding that one side fixedly connected with water conservancy diversion of fan is kept away from to the blade, the air vent has been seted up at bellied middle part of water conservancy diversion, the air vent runs through blade and water conservancy diversion arch, the opposite side that the blade was kept away from to the fan is provided with an album powder ware, the air intake has been seted up to the lateral wall top in smashing the chamber, the air intake is located the top of blade and fan, and the air intake position is partial to the fan.

Preferably, four sets of flow guide protrusions and four sets of vent holes are arranged, the four sets of flow guide protrusions and the four sets of vent holes are uniformly distributed along the axial center circumference of the blade, and the side edges of the flow guide protrusions are tangent to the surface of the blade.

Preferably, the inside of the vent hole is provided with a thread groove.

The invention has the following beneficial effects:

1. according to the invention, the effect of reducing the suction force is realized by designing the shape of the blade surface, the flow guide bulge is arranged on one side of the blade, so that the movement paths of the air flow on the two sides of the blade are different, the air speeds of the air flow moving on the two sides of the blade are different in the same time, and the Bernoulli principle shows that the air speed is high, the pressure is low, so that the air flows to one side with high air speed, and the air in the gap between the blade and the fan flows to one side of the fan, and the other part flows to the flow guide bulge side through the vent hole, so that the reverse suction force is generated in the direction of the fan, the effect of reducing the suction force of the fan is achieved, the normal high-speed rotation cutting performance of the blade is ensured, and the suction force of the high-speed air flow guiding sawdust is reduced, thereby preventing the unqualified sawdust from being discharged in advance.

2. The blade is provided with the vent holes penetrating through the blade, so that the heat on the blade is taken away by flowing air, the effect of convection heat dissipation is realized, and the service life of the blade is effectively prolonged.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a side view of a blade according to the present invention;

fig. 3 is a schematic view of the direction of the flow of the gas stream according to the present invention.

In the figure: 1. a grinding chamber; 2. a main shaft; 3. a blade; 4. a fan; 5. a flow guide bulge; 6. a vent hole; 7. a powder collector; 8. and an air inlet.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the 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.

Referring to fig. 1-3, a sawdust wood chip pulverizer comprises a pulverizing chamber 1, a main shaft 2 is arranged in an inner cavity of the pulverizing chamber 1, a power source of the main shaft 2 comes from a motor, one end of the main shaft 2 is movably mounted with an output end of the motor, a blade 3 is fixedly mounted on the outer side of one end, close to the motor, of the main shaft 2, a fan 4 is fixedly mounted at one end, far away from the blade 3, of the main shaft 2, a flow guide protrusion 5 is fixedly connected to one side, far away from the fan 4, of the blade 3, a vent hole 6 is formed in the middle of the flow guide protrusion 5, the vent hole 6 penetrates through the blade 3 and the flow guide protrusion 5, a powder collector 7 is arranged on the other side, far away from the blade 3, of the fan 4, an air inlet 8 is formed in the upper portion of the side wall of the pulverizing chamber 1, the air inlet 8 is located above the blade 3 and the fan 4, and the position of the air inlet 8 is deviated to the fan 4.

Wherein, four sets of flow guide protrusions 5 and vent holes 6 are arranged, the four sets of flow guide protrusions 5 and vent holes 6 are uniformly distributed along the axial center circumference of the blade 3, the side edges of the flow guide protrusions 5 are tangent to the surface of the blade 3, the flow guide protrusions 5 are arranged on the side of the blade 3 far away from the fan 4, so that the surface of the side on which the flow guide protrusions 5 are arranged is enlarged, when the blade rotates, the air attached to the surfaces of the two sides of the blade 3 is driven to rotate together, as can be seen from v = s/t, (v represents the wind speed of the surface of the blade 3, s represents the circumference of the surface of the blade 3 moving for one circle, and t represents the time of the surface of the flow guide protrusions 5 moving for one circle, when the air current moves for one circle on the surface of the blade 3, because the time t of one circle rotation is the same, the circumference of the surface on which the flow guide protrusions 5 are arranged is larger than the circumference of the surface of the side of the flow guide protrusions 5 on the blade 3, therefore, the wind speed on the side of the blade 3 close to the guide projection 5 is higher than the wind speed on the side of the blade 3 far from the guide projection 5, according to bernoulli's principle, the pressure is lower where the wind speed is higher, so the pressure on the side of the blade 3 close to the guide projection 5 is lower than the pressure on the side of the blade 3 far from the guide projection 5, referring to fig. 3, most of the air in the cavity of the pulverization chamber 1 passes through the gap between the blade 3 and the fan 4, then the fan 4 drives the air flow into the powder collector 7, and the air on the side of the blade 3 flows from the gap between the blade 3 and the fan 4 to the side of the blade 3 close to the guide projection 5 through the vent hole 6 under the action of the pressure, so that part of the air between the blade 3 and the fan 4 is counteracted, thereby the amount of the air flowing to the fan 4 is reduced, the suction force generated by the fan 4 is reduced, and the suction force is prevented from being too high, make the inside that the substandard material that the quality is lighter enters into powder collector 7 in advance, when the wind that flows passes air vent 6 from one side of blade 3 and flows to the opposite side simultaneously, can take away blade 3 because the heat that high-speed cutting produced, reach a convection heat dissipation's effect, improved blade 3's life effectively.

Wherein, the thread groove has been seted up to the inside of air vent 6 for when the air current flowed to the opposite side from one side of blade 3, the air current can be rotatory along the screw thread in the inside of air vent 6, and the air of 3 opposite sides of blade is produced the vortex effect to the air of outflow, when the blade cutting, plays a stirring effect, makes the saw-dust collision in the air more violent, has increased crushing effect.

The using method of the invention is as follows:

the motor of the grinder is turned on, the device is started, the wood chips are placed into the inlet of the grinder, the wood chips are conveyed to a cutting position, the wood chips are cut by the blade 3, the blade 3 rotates to drive the air attached to the surfaces of the two sides of the blade 3 to rotate together, according to v = s/t, v represents the wind speed of the surface of the blade 3, s represents the circumference of one circle of wind moving on the surface of the blade 3, t represents the time of one circle of wind moving on the surface of the blade 3, when the air current moves on the surface of the blade 3 for one circle, the circumference of one circle of the surface where the flow guide protrusion 5 is located is larger than the circumference of one side surface of the flow guide protrusion 5 according to the principle of the blade 3, the wind speed of one side of the blade 3 close to the flow guide protrusion 5 is larger than the wind speed of one side of the blade 3 far from the flow guide protrusion 5 according to the Bernoulli principle, the smaller the pressure is, the pressure on the side of the blade 3 close to the guide projection 5 is smaller than the pressure on the side of the blade 3 far from the guide projection 5, most of the air in the inner cavity of the crushing cavity 1 passes through the gap between the blade 3 and the fan 4, then the fan 4 drives the air flow to the inside of the powder collector 7, meanwhile, the crushed materials are brought into the powder collector 7 through the air flow, and under the action of the pressure, the air on the side of the blade 3 flows to the side of the blade 3 close to the guide projection 5 from the gap between the blade 3 and the fan 4 through the vent hole 6, so that the reverse suction is generated on the fan on the side of the guide projection 5 of the blade 3, the amount of the gas flowing to the fan 4 is reduced, the effect of reducing the suction is achieved, and the attraction of the high-speed air flow for guiding out the wood chips is reduced.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are 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.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a sawdust wood chip rubbing crusher, includes crushing chamber (1), its characterized in that: the inner cavity of the crushing cavity (1) is provided with a main shaft (2), one end of the main shaft (2) is movably installed with the output end of a motor, a blade (3) is fixedly installed at the outer side of one end, close to the motor, of the main shaft (2), a fan (4) is fixedly installed at one end, far away from the blade (3), of the main shaft (2), a flow guide bulge (5) is fixedly connected to one side, far away from the fan (4), of the blade (3), an air vent (6) is formed in the middle of the flow guide bulge (5), a threaded groove is formed in the air vent (6), the air vent (6) penetrates through the blade (3) and the flow guide bulge (5), a powder collector (7) is arranged at the other side, far away from the blade (3), of the fan (4), an air inlet (8) is formed above the side wall of the crushing cavity (1), and the air inlet (8) is positioned above the blade (3) and the fan (4), the position of the air inlet (8) deviates to the fan (4);

the flow guide protrusions (5) and the air holes (6) are provided with four groups, the four groups of flow guide protrusions (5) and the four groups of air holes (6) are uniformly distributed along the axial center circumference of the blade (3), and the side edges of the flow guide protrusions (5) are tangent to the surface of the blade (3).