Blade crushing and screening device

Abstract

The invention relates to the technical field of biomass energy comprehensive application, and discloses a blade crushing and screening device which comprises a shell, a cutterhead assembly and a conveying assembly. The axis of the shell extends in the first direction, and the cutterhead assembly comprises a cutterhead shaft, an angle adjusting mechanism and blades. The cutterhead shaft is arranged in the shell and is collinear with the axis of the shell, a through hole penetrating in the first direction is formed in the center of the cutterhead shaft, the through hole is used for allowing a driving part driving the cutterhead shaft to rotate around the axis of the cutterhead shaft to penetrate through, and a sealing interlayer is formed between the cutterhead shaft and the driving part; the blade is arranged on the peripheral wall of the cutter head shaft, and the angle adjusting mechanism is arranged in the sealing interlayer and is correspondingly connected with the blade so as to control the blade to rotate around the axis of the blade; the conveying assembly is connected with the angle adjusting mechanism and used for providing driving force for the angle adjusting mechanism. The angles of the blades and the cutting gaps between the adjacent blades can be adjusted in real time through the angle adjusting mechanism, and real-time dynamic control over the ventilation resistance and the material powder fineness in the shell is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of biomass energy crushing equipment, and specifically relates to a blade crushing and screening device. Background Art

[0002] In the context of the increasing depletion of fossil energy today, the utilization of renewable energy is a hot issue in the 21st century. The rich global reserves and short-term renewable characteristics of biomass have attracted much attention. Whether biomass is applied in the power generation field or the chemical industry field, it will ultimately focus on the related issues of biomass crushing and grinding.

[0003] However, the existing powder-making equipment for biomass crushing cannot dynamically adjust the fineness of the powder in real time, and cannot meet the requirements of industrial-scale fine powder and ultrafine powder. Summary of the Invention

[0004] The purpose of the present invention is to provide a blade crushing and screening device to solve the problem that the existing biomass powder-making equipment in the above background art cannot dynamically adjust the fineness of the powder in real time.

[0005] To achieve the above purpose, the present invention provides the following technical solutions:

[0006] A blade crushing and screening device, comprising:

[0007] A housing, the axis of the housing extends along a first direction, the interior of the housing is hollow and has a top opening and a bottom opening; the top opening of the housing is used to communicate with a discharging mechanism, and the bottom opening of the housing is used to communicate with a blowing and material-carrying slag-discharging mechanism;

[0008] A cutter head assembly, the cutter head assembly includes a cutter head shaft, an angle adjustment mechanism and a plurality of blades; the cutter head shaft is arranged inside the housing and collinear with the axis of the housing, a through hole extending along the first direction is opened in the center of the cutter head shaft, the through hole is used to pass through a driving member that drives the cutter head shaft to rotate around its own axis, and a blanking pipe for feeding materials in the direction from the top end of the housing to the bottom end of the housing is arranged inside this driving member, and a sealed sandwich layer is formed between the cutter head shaft and this driving member; one ends of the plurality of blades are rotatably arranged on the outer peripheral wall of the cutter head shaft around their own axes, the other ends of the plurality of blades extend in a direction away from the cutter head shaft, and the angle adjustment mechanism is arranged inside the sealed sandwich layer and is correspondingly connected to the blades to control the rotation of the blades around their own axes;

[0009] A conveying assembly, the conveying assembly is arranged above the cutter head shaft, and the conveying assembly is connected to the angle adjustment mechanism and is used to provide driving force for the angle adjustment mechanism. Through this setting, under the action of the angle adjustment mechanism, the blades can rotate around their own axes, so as to adjust the inclination angle of the blades and the cutting gap between adjacent blades, and realize the real-time dynamic control of the fineness of the powder in the housing and the ventilation resistance.

[0010] Furthermore, one end of each of the blades is provided with a rotary shaft. The axis of the rotary shaft is collinear with the axis of the blade and extends along the second direction. A plurality of the blades are all connected to the angle adjustment mechanism through their respective rotary shafts. The second direction is perpendicular to the first direction. By this setting, the angle of the blade can be adjusted by driving the rotary shaft to rotate by the angle adjustment mechanism.

[0011] Furthermore, the angle adjustment mechanism includes an adjustment component; the adjustment component includes a driver, a pressure rod, a plurality of link components and a plurality of transmission rods; the pressure rods are circumferentially distributed on the inner wall of the cutter head shaft along the circumferential direction of the cutter head shaft. The output end of the driver is connected to the pressure rod to drive the pressure rod to move up and down along the first direction. The first ends of a plurality of the link components are all hinged to the pressure rod. The second ends of a plurality of the link components are respectively connected to the rotary shafts of the blades located on the same circumferential surface on the cutter head shaft. A plurality of the transmission rods all extend along the first direction, and a plurality of the transmission rods are used to connect one side of the rotary shafts collinear along the first direction, so that the blades collinear along the first direction rotate synchronously. When the size of the cutter head shaft is small and the driving force of the oil cylinder is strong, setting a group of adjustment components can drive all the blades on the cutter head shaft to rotate synchronously.

[0012] Furthermore, the angle adjustment mechanism includes a plurality of adjustment components. Each adjustment component includes a driver, a pressure rod, a plurality of link components and a plurality of transmission rods; the pressure rods in each adjustment component are distributed along the same circumferential surface of the cutter head shaft. The output end of the driver is connected to the pressure rod to drive the pressure rod to move up and down along the first direction. The first ends of a plurality of the link components are all hinged to the pressure rod. The second ends of a plurality of the link components are respectively connected to the rotary shafts located on the same circumferential surface on the cutter head shaft. A plurality of the transmission rods all extend along the first direction, and a plurality of the transmission rods are used to connect one side of the rotary shafts collinear along the first direction, so that the blades collinear along the first direction rotate synchronously. When the size of the cutter head shaft is large and the power of one oil cylinder obviously cannot meet the requirements, multiple groups of adjustment components can be set.

[0013] Furthermore, the angle adjustment structure includes an adjustment component; the adjustment component includes a pressure rod, a plurality of drivers, a plurality of link components and a plurality of transmission rods; the pressure rod is circumferentially arranged on the inner wall of the cutter head shaft along the circumferential direction of the cutter head shaft. The output ends of a plurality of the drivers are all connected to the pressure rod to synchronously drive the pressure rod to move up and down along the first direction. The first ends of a plurality of the link components are all hinged to the pressure rod. The second ends of a plurality of the link components are respectively connected to the rotary shafts of the blades located on the same circumferential surface on the cutter head shaft. A plurality of the transmission rods all extend along the first direction, and a plurality of the transmission rods are used to connect one side of the rotary shafts collinear along the first direction, so that the blades collinear along the first direction rotate synchronously. By this setting, the number of pressure rods can be simplified, and all the blades on the cutter head shaft can still be rotated synchronously.

[0014] Further, the connecting rod assembly includes a first connecting rod and a second connecting rod; the first end of the first connecting rod is hinged to the pressure rod, the first end of the second connecting rod is hinged to the second end of the first connecting rod, and the second end of the second connecting rod is fixedly connected to the corresponding rotating shaft. With this arrangement, the connecting rod assembly is formed by hinging the first connecting rod and the second connecting rod, with a simple and reasonable structure. By cooperating with the pressure rod and the rotating shaft, the blade angle can be adjusted.

[0015] Further, the driver is an oil cylinder; among the oil cylinders of all the adjusting assemblies, the oil inlet of one oil cylinder is connected to the conveying assembly, the oil outlet of this oil cylinder is connected to the oil inlet of the next oil cylinder, and the remaining oil cylinders are connected in series in sequence until the oil outlet of the last oil cylinder is connected to the conveying assembly. Using an oil cylinder as the driver, its output power is stable. The series connection between each oil cylinder makes the oil passing through each oil cylinder the same, which can ensure that the displacement of the output shaft of each oil cylinder is the same, and ensure that the blade angle adjustment amount is consistent. It realizes that all the blades in the housing rotate synchronously with the action of the oil cylinder, meeting the dynamic balance requirements of the blades in the housing rotating at high speed with the cutter head shaft.

[0016] Further, the conveying assembly includes a support plate, an oil circuit rotary ring, and an oil circuit conveying ring; the oil circuit rotary ring is fixed in the housing through the support plate, and the oil circuit rotary ring is located above the cutter head shaft. An oil inlet and outlet channel is opened in one of the support plates to connect the oil circuit channel in the oil circuit rotary ring with the external oil supply system. The oil circuit conveying ring is fixed to the upper end face of the cutter head shaft, and the oil circuit rotary ring is rotatably and sealingly connected to the oil circuit conveying ring. The oil circuit conveying ring is used to connect the oil inlet of one oil cylinder and the oil outlet of the last oil cylinder with the oil circuit channel in the oil circuit rotary ring; the central through holes of the oil circuit rotary ring and the oil circuit conveying ring are used for the driving member that drives the cutter head shaft to rotate around its own axis to pass through. With this arrangement, there is no oil circuit entanglement or knotting phenomenon during the rotation of the cutter head shaft, improving the working stability of the cutter head shaft.

[0017] Further, the oil conveying channels in the support plate include an oil inlet pipe and an oil return pipe; an annular oil inlet channel and an annular oil return channel are opened in the oil circuit rotary ring. The oil inlet pipe is connected to the oil inlet channel, and the oil return pipe is connected to the oil return channel; oil inlet pipelines and oil return pipelines distributed vertically are opened on the oil circuit conveying ring. The oil inlet pipeline connects the oil inlet channel with the oil inlet of one oil cylinder, and the oil return pipeline connects the oil outlet of the last oil cylinder with the oil return channel. With this arrangement, the oil conveying pipelines are reasonably configured, effectively avoiding oil circuit entanglement and knotting.

[0018] Further, the inner wall of the housing has a turbulent layer to form turbulence when the material approaches the inner wall of the housing. With this arrangement, the material rising with the airflow can be further disturbed, preventing the material from adhering to the inner wall of the lower housing and improving the crushing effect of the material.

[0019] Furthermore, the turbulent layer protrudes from the inner wall surface of the housing, and the turbulent layer is provided with protruding blocks distributed in a spiral line shape; or is formed by sequentially arranging a plurality of annular protruding blocks.

[0020] The present invention has the following advantages over the prior art:

[0021] 1. The blade crushing and screening device in the present invention includes a housing, a cutter head assembly, and a conveying assembly. The interior of the housing is hollow and has a top opening and a bottom opening. The top opening is used to communicate with the discharging mechanism, and the bottom opening is used to communicate with the air-blowing and material-carrying slag-discharging mechanism. The cutter head assembly includes a cutter head shaft, an angle adjustment mechanism, and a plurality of blades. A through hole is provided in the center of the cutter head shaft, and the through hole is used for passing through a driving member that drives the cutter head shaft to rotate around its own axis. A blanking pipe for feeding materials in the direction from the top of the housing to the bottom of the housing is arranged inside this driving member. During specific implementation, the blanking pipe, the output end of the driving mechanism, and the cutter head shaft in the cutter head assembly are sleeved with each other and are coaxial with the housing. This design makes the entire blade crushing and screening device have a compact structure and effectively reduces the floor area. The blades in the cutter head assembly are installed on the cutter head shaft, and the cutter head shaft is driven to rotate by the output end of the driving mechanism, so that the blades can break the materials under the action of cutting and impact. At the same time, under the action of the angle adjustment mechanism, the blades can rotate around their own axes, thereby adjusting the angles of the blades and the cutting gaps between adjacent blades. Under the action of the high-speed rotation of the blades, the rotation of the blades will provide a certain lifting force or resistance to the materials rising with the airflow, which may cause the materials to easily pass through the blade intervals or not easily pass through the blade intervals, thereby playing a role in screening and adjusting the fineness of the materials. From another perspective, when the blades rotate, the continuous change of the cutting gaps between adjacent blades on the same circumferential surface will intercept the larger-particle materials and continue to cut and break them, and the materials meeting the fineness requirements can pass through the cutting gaps and be discharged through the discharge port, thereby playing a role in screening. In addition, if the ventilation resistance is too large or too small, the angle of the blades can also be adjusted to provide a certain lifting force or resistance. This device realizes the real-time dynamic control of the fineness of the powder in the housing and the ventilation resistance, meets the fineness requirements of different working conditions, and ensures the stable operation of the entire grinding system.

[0022] 2. The angle adjustment mechanism in the present invention can be provided with one or more sets of adjustment components according to the actual situation. When the size of the cutter head shaft is small and the driving force of the oil cylinder is strong, one set of adjustment components can be set; when the size of the cutter head shaft is large and the power of one oil cylinder obviously cannot meet the requirements, multiple sets of adjustment components can be set. When there is one set of adjustment components, only one oil cylinder is set. This oil cylinder is fixed on the inner wall of the cutter head shaft, and the pressure rods are arranged in a ring in the sealing layer between the cutter head shaft and the driving shaft. The output shaft of the oil cylinder is connected to the pressure rods; the number of the connecting rod components and the transmission rods corresponds one by one to the number of the blade rotating shafts on the same circumferential surface. The blade rotating shafts on the same circumferential surface are connected to the pressure rods through the connecting rod components; the blade rotating shafts collinear in the first direction are connected through the transmission rods; the oil cylinder drives the pressure rods to move up and down in the first direction, and the connecting rod components and the transmission rods act to drive the blades on the blade shaft to rotate around their own axes, so as to adjust the angle of the blades and the cutting gap between adjacent blades. When there are multiple sets of adjustment components, the number of the oil cylinders and the pressure rods also corresponds to multiple. The number of the connecting rod components and the transmission rods still corresponds one by one to the number of the blades on the same circumferential surface. At this time, multiple pressure rods are evenly distributed on the same circumferential surface of the cutter head shaft, and the oil cylinders are connected to the pressure rods one by one; the connecting rod components are connected to the corresponding pressure rods, and the transmission rods are used to connect the rotating shafts collinear in the first direction, and their action principle is the same as the above. By setting the adjustment components, all the blades on the blade shaft can move synchronously, and the rotation angles of the blades are the same, meeting the dynamic balance requirements of high-speed rotation.

[0023] 3. The conveying component in the present invention is used to supply oil to the angle adjustment mechanism. The conveying component includes a support plate, an oil circuit rotary ring and an oil circuit conveying ring. The support plate is used to fix the oil circuit rotary ring in the shell, and an oil delivery channel is opened in one of the support plates to connect the oil circuit channel in the oil circuit rotary ring with the external oil supply system; the oil circuit conveying ring rotates with the cutter head shaft, and at the same time, the oil circuit conveying ring is also connected to the oil circuit rotary ring and is connected to the oil inlet of one oil cylinder and the oil outlet of the last oil cylinder. Through this setting, there is no phenomenon of oil circuit entanglement and knotting during the rotation of the cutter head shaft, improving the working stability of the cutter head shaft. The oil cylinders in multiple adjustment components are connected in series in sequence. Through this setting, the oil passing amount of each oil cylinder can be the same, that is, the displacement of the output shaft of each oil cylinder can be ensured to be the same, ensuring that the blade angle adjustment amount is consistent. All the blades rotate synchronously with the action of the oil cylinder, meeting the dynamic balance requirements of high-speed rotation. Description of the Drawings

[0024] Figure 1 is the structural schematic diagram of the blade crushing and screening device in Embodiment 1 of the present invention;

[0025] Figure 2 is the cross-sectional schematic diagram of the blade crushing and screening device in Embodiment 1 of the present invention;

[0026] Figure 3 isFigure 2 Enlarged schematic view at position A in [the figure];

[0027] Figure 4 is Figure 2 Enlarged schematic view at position B in [the figure];

[0028] Figure 5 Structural schematic diagram of the cutter head assembly in Embodiment 1 of the present invention;

[0029] Figure 6 Cross-sectional schematic diagram of the oil circuit rotary ring in Embodiment 1 of the present invention;

[0030] Figure 7 Structural schematic diagram of the connection between the blade crushing and screening device and the discharge structure in Embodiment 1 of the present invention;

[0031] Figure 8 Structural schematic diagram of the connection between the blade crushing and screening device, the discharge mechanism and the air-blowing material-carrying and slag-discharging mechanism in Embodiment 1 of the present invention;

[0032] Figure 9 Cross-sectional view of the air-blowing material-carrying and slag-discharging mechanism in Embodiment 1 of the present invention;

[0033] Figure 10 Structural schematic diagram of the material distribution block and the air-blowing ring in Embodiment 1 of the present invention;

[0034] Figure 11 Schematic diagram of the cooperation between the blade crushing and screening device and the primary crushing system of the mill in Embodiment 4 of the present invention;

[0035] Figure 12 Structural schematic diagram of the cooperation between the blade crushing and screening device and the roller mill in Embodiment 5 of the present invention;

[0036] In the figure: 1. housing; 101. raised block; 2. discharging mechanism; 201. upper protective housing; 202. discharging port; 203. blanking pipe; 3. driving mechanism; 301. driving motor; 302. transmission component protective cover; 303. driving shaft; 4. cutter head assembly; 401. cutter head shaft; 402. angle adjustment mechanism; 4021. driver; 4022. pressure bar; 4023. first connecting rod; 4024. second connecting rod; 4025. transmission rod; 403. blade; 404. rotating shaft; 5. blowing, carrying and slag discharging mechanism; 501. lower protective housing; 502. air inlet; 503. slag discharging port; 504. material distributing block; 505. blowing ring; 506. air guiding hole; 507. slag discharging plate; 508. air guiding platform; 6. conveying component; 601. support plate; 6011. oil inlet pipe; 6012. oil return pipe; 602. oil circuit rotating ring; 6021. oil inlet channel; 6022. oil return channel; 603. oil circuit conveying ring; 604. dynamic seal; 7. return material coarse crushing device; 8. primary crushing system of mill; 9. roller mill; 901. driving device; 902. transmission support part; 903. housing support rod seat; 904. slag discharging port; 905. nozzle ring; 906. grinding disc; 907. grinding roller; 908. loading device; 909. air inlet. Detailed implementation manners

[0037] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0038] It should be noted that in the description of the present invention, the orientation or positional relationships indicated by the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationships shown in the accompanying drawings. It is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be construed as a limitation to the present invention.

[0039] In addition, it should be understood that for the convenience of description, the sizes of the various components shown in the accompanying drawings are not drawn according to the actual proportional relationship.

[0040] It should be noted that similar reference numerals and letters indicate similar items in the following drawings. Therefore, once an item is defined or described in one drawing, it will not be necessary to further specifically discuss and describe it in the description of the subsequent drawings.

[0041] Embodiment 1:

[0042] As Figure 1 , Figure 2 and Figure 5 shown, a blade crushing and screening device includes: a housing 1, a cutter head assembly 4, and a conveying assembly; the axis of the housing 1 extends in a first direction (the first direction in this embodiment is the vertical direction in the attached drawings), the interior of the housing 1 is hollow and has a top opening and a bottom opening; the top opening of the housing 1 is used to communicate with a discharging mechanism 2, and the bottom opening of the housing 1 is used to communicate with a blowing and material-carrying slag-discharging mechanism 5. Specifically, as Figure 6 shown, the discharging mechanism 2 mentioned in this embodiment includes an upper protective housing 201 and a blanking pipe 203; the interior of the upper protective housing 201 is hollow and has a top opening and a bottom opening, the bottom opening of the upper protective housing 201 is used to connect with the top opening of the housing 1, so that the internal space of the upper protective housing 201 is in communication with the internal space of the housing 1, and a discharging port 202 is provided on one side of the upper protective housing 201. The powder that meets the fineness requirements after being crushed by the cutter head assembly is discharged through the discharging port 103. The blanking pipe 203 extends into the upper protective housing 201 along the top opening of the upper protective housing 201 and extends to the internal space of the housing 1, so that the blanking pipe 203 can feed materials along the direction from the top end to the bottom end of the housing 1. Among them, the axes of the upper protective housing 201, the blanking pipe 203, and the housing 1 are collinear.

[0043] The cutter head assembly 4 includes a cutter head shaft 401, an angle adjustment mechanism 402, and a plurality of blades 403; the cutter head shaft 401 is arranged in the housing 1 and is collinear with the axis of the housing 1. A through hole penetrating along the first direction is provided in the center of the cutter head shaft 401. The through hole is used to pass through a driving member that drives the cutter head 401 shaft to rotate around its own axis, and the blanking pipe 203 is arranged in the inner cavity of the driving member. A sealed interlayer is formed between the cutter head shaft 401 and this driving member; one end of a plurality of blades 403 is rotatably arranged on the outer peripheral wall of the cutter head shaft 401, and the other ends of the plurality of blades 403 extend in a direction away from the cutter head shaft 401. The angle adjustment mechanism is arranged in the sealed interlayer and is correspondingly connected to the blades 403 to control the rotation of the blades 403 around their own axes.

[0044] Specifically, the cutter head shaft 401 is driven to rotate by the driving mechanism 3. The driving mechanism 3 includes a driving motor 301, a transmission component, and a driving shaft 303. The driving shaft 303 is the driving part that drives the cutter head shaft 401 to rotate around its own axis. The driving shaft 303 passes through the top opening of the upper protective housing 201 and extends into the housing 1. Inside the upper protective housing 201 and the housing 1, the driving shaft 303 is rotatably sleeved around the outer circumference of the blanking pipe 203. The axis of the driving shaft 303 is collinear with the axis of the blanking pipe 203, and the blanking pipe 203 does not rotate with the driving shaft 303. The driving motor 301 is arranged on the housing 1. The output shaft of the driving motor 301 is connected to the driving shaft 303 through the transmission component to drive the driving shaft 303 to rotate around its own axis. A transmission component protective cover 302 is arranged outside the transmission component to protect the transmission component. A common belt or sprocket chain transmission mechanism can be selected for the transmission component to achieve the transmission effect. Rotatable sealing mechanisms (common rotary sealing mechanisms are acceptable) are arranged between the driving shaft 303 and the top opening of the upper protective housing 201, and between the bottom of the driving shaft 303 and the blanking pipe 203. Without affecting the rotation of the driving shaft 303, it prevents powder from entering the gap between the driving shaft 303 and the blanking pipe 203, and prevents dust and the like from entering the housing 1 or the driving mechanism 3 from the outside. By adjusting the rotation speed of the driving motor 301, stepless control of the rotation speed of the cutter head shaft 401 can be achieved.

[0045] The conveying component is arranged above the cutter head shaft 401. The conveying component is connected to the angle adjustment mechanism 402 and is used to provide driving force for the angle adjustment mechanism 402. Under the action of the angle adjustment mechanism, the blade can rotate around its own axis, thereby adjusting the inclination angle of the blade and the cutting gap between adjacent blades. If the ventilation resistance is too large or too small, the angle of the blade 403 can also be adjusted to provide a certain lift or resistance, realizing real-time dynamic control of the ventilation resistance and powder fineness in the housing 1. While meeting the fineness requirements of different working conditions, the stable operation of the entire grinding system is ensured.

[0046] Such as Figure 2 and Figure 5As shown, one end of each blade 403 has a rotation shaft 404. The axis of the rotation shaft 404 and the axis of the blade 403 are collinear and extend in the second direction (the second direction in this embodiment is the horizontal direction in the attached drawing). A plurality of the blades 403 are all connected to the angle adjustment mechanism 402 through their own rotation shafts 404. The second direction is perpendicular to the first direction. By providing the rotation shaft 404, it is convenient for the angle adjustment mechanism 402 to be connected to the blade 403. The angle adjustment mechanism 402 can directly control the rotation shaft 404 to adjust the angle of the blade 403, which is simple, fast, and has high stability. In this embodiment, multiple layers of blade groups are arranged on the cutter head shaft 401 along the first direction. Each layer of blade group has a plurality of blades 403 evenly distributed along the circumferential surface of the cutter head shaft 401. And along the first direction, the rotation shafts 404 of the blades on adjacent two circumferential surfaces are collinear along the first direction. This arrangement is convenient for the angle adjustment mechanism to be connected to the blade 403.

[0047] As Figure 2 , Figure 4 and Figure 5 shown, in this embodiment, the angle adjustment mechanism 402 includes a plurality of adjustment components. Each adjustment component includes a driver 4021, a pressure rod 4022, a plurality of link components, and a plurality of transmission rods 4025. The pressure rods 4022 in each adjustment component are all distributed along the same circumferential surface of the cutter head shaft. The output end of the driver 4021 is connected to the pressure rod 4022 to drive the pressure rod 4022 to move up and down along the first direction. The first ends of the plurality of link components are all hinged to the pressure rod 4022. The second ends of the plurality of link components are correspondingly connected to the rotation shafts 404 located on the same circumferential surface of the cutter head shaft 401. The plurality of transmission rods 4025 all extend along the first direction, and the plurality of transmission rods 4025 are used to connect one side of the rotation shafts 404 that are collinear along the first direction, so that the blades 403 that are collinear along the first direction rotate synchronously. Through the above settings, only by ensuring that the drivers 4021 work synchronously, all the blades 403 on the cutter head shaft 401 can be driven to be adjusted synchronously, and the rotation angles of the blades 403 are the same, so as to meet the dynamic balance requirements during the high-speed rotation process. When the size of the cutter head shaft 401 is large or high stability is required, the solution of setting a plurality of adjustment components in this embodiment can be adopted. When the size of the cutter head shaft 401 is small, only one adjustment component can also be set.

[0048] As Figure 4As shown, the connecting rod assembly includes a first connecting rod 4023 and a second connecting rod 4024; the first end of the first connecting rod 4023 is hinged to the pressure rod 4022, the first end of the second connecting rod 4024 is hinged to the second end of the first connecting rod 4023, and the second end of the second connecting rod 4024 is fixedly connected to the corresponding rotary shaft 404. In this embodiment, the connecting rod assembly is composed of the first connecting rod 4023 and the second connecting rod 4024 hinged together. It has a simple structure and can drive the rotary shaft 404 to rotate in cooperation with the pressure rod 4022, thereby adjusting the angle of the blade 403.

[0049] As Figure 2 and Figure 3 shown, the driver 4021 is an oil cylinder; among the oil cylinders of all the adjustment assemblies, the oil inlet of one of the oil cylinders is connected to the conveying assembly 6, the oil outlet of this oil cylinder is connected to the oil inlet of the next oil cylinder, and the remaining oil cylinders are connected in series in turn until the oil outlet of the last oil cylinder is connected to the conveying assembly 6. Using an oil cylinder as the driver, its output power is stable. The series connection between the oil cylinders makes the oil passing through each oil cylinder the same, which can ensure that the displacement of the output shaft of each oil cylinder is the same, and ensure that the blade angle adjustment amount is consistent. It realizes that all the blades in the housing rotate synchronously with the action of the oil cylinder, meeting the dynamic balance requirements of the blades in the housing rotating at high speed with the cutter head shaft. In specific implementation, on the premise of meeting the stable power output, a cylinder or other driving mechanisms can also be selected.

[0050] As Figure 1 、 Figure 3 and Figure 6 shown, the conveying assembly includes a support plate 601, an oil circuit rotary ring 602 and an oil circuit conveying ring 603; the oil circuit rotary ring 602 is fixed at the top opening of the housing 1 through the support plate 601, and the oil circuit rotary ring 602 is located above the cutter head shaft 401. An oil inlet and outlet channel is opened in one of the support plates 601 to connect the oil circuit channel in the oil circuit rotary ring 602 with the external oil supply system. The oil circuit conveying ring 603 is fixed to the upper end face of the cutter head shaft 401, and the oil circuit rotary ring 602 and the oil circuit conveying ring 603 are rotatably and sealingly connected. The oil circuit conveying ring 603 is used to connect the oil inlet of one of the oil cylinders and the oil outlet of the last oil cylinder with the oil circuit channel in the oil circuit rotary ring 602; the central through holes of the oil circuit rotary ring 602 and the oil circuit conveying ring 603 are for the driving shaft 303 to pass through. The cooperation between the oil circuit rotary ring 602 and the oil circuit conveying ring 603 is similar to that of a multi-channel rotary joint. The oil circuit rotary ring 602 is fixed in the housing 1 through the support plate 6, and it does not rotate with the cutter head shaft 401, while the oil circuit conveying ring 603 is fixed to the upper end of the cutter head shaft 401 and rotates with the cutter head shaft.

[0051] Specifically, the oil conveying channels in the support plate 601 include an oil inlet pipe 6011 and an oil return pipe 6012; AsFigure 3 and Figure 6 As shown in Figure 6 , an annular oil inlet passage 6021 and an annular oil return passage 6022 are formed in the oil circuit rotary ring 602. The oil circuit rotary ring 602 is in contact with the oil circuit delivery ring 603. Dynamic seals 604 are provided between the oil inlet passage 6021 and the oil return passage 6022 and between the oil circuit rotary ring 603 and the oil circuit delivery ring 603 to prevent oil leakage during relative rotation. The oil inlet pipe 6011 is connected to the oil inlet passage 6021, and the oil return pipe 6012 is connected to the oil return passage 6022. Oil inlet pipelines and oil return pipelines are formed on the oil circuit delivery ring 603 in the vertical direction. The oil inlet pipeline connects the oil inlet passage 6021 with the oil inlet of one of the oil cylinders, and the oil return pipeline connects the oil outlet of the last oil cylinder with the oil return passage 6022. With this arrangement, there is no oil circuit entanglement or knotting during the rotation of the cutter head shaft, improving the working stability of the cutter head shaft. An oil circuit control system is also provided externally to control the oil supply to the oil cylinders to adjust the angle of the cutting blades.

[0052] As Figure 1 、 Figure 2 and Figure 8 As shown in Figure 8 , the inner wall of the housing 1 has a turbulent layer to form turbulence when the material approaches the inner wall of the housing. With this arrangement, the material rising with the air flow can be further disturbed, preventing the material from adhering to the inner wall of the lower housing and improving the crushing effect of the material. Specifically, the turbulent layer protrudes from the inner wall surface of the housing, and the turbulent layer is composed of raised blocks 101 distributed in a spiral shape; or is formed by a plurality of annular raised blocks 101 arranged in sequence.

[0053] As Figures 8 - 10 As shown in Figures 8 - 10 , in this embodiment, the blowing and material-carrying slag discharging mechanism 5 includes a lower protective housing 501 and a material distributing and blowing mechanism for equalizing the falling material and changing the air flow velocity and direction. The lower protective housing 501 is connected to the bottom opening of the housing 1, and the inner cavity of the lower protective housing 501 is communicated with the inner cavity of the housing 1. The material distributing and blowing mechanism is arranged on the inner wall of the lower protective housing 501. An air inlet 502 is formed on one side of the lower protective housing 501, and the air inlet 502 is located below the material distributing and blowing mechanism. A slag discharging port 507 is formed on the other side of the lower protective housing 501. The air flow enters the lower protective housing 501 through the air inlet 502, and after the air flow velocity and direction are adjusted by the material distributing and blowing mechanism, the material discharged from the blanking pipe 2 is blown to the cutting blade 403 for crushing and screening. The material with qualified fineness is discharged through the discharge port 103, and the material that is difficult to break is discharged through the slag discharging port 503.

[0054] As Figure 9 and Figure 10As shown in the figure, the material distributing and blowing mechanism includes a material distributing block 504 arranged in sequence along the blanking direction for evenly distributing the falling materials and a blowing ring 505 for changing the air flow velocity and direction. The material distributing block 504 is conical. The blowing ring 505 has a top surface, a bottom surface, and a conical surface connecting the top surface and the bottom surface. The top surface area of the blowing ring 505 is smaller than the bottom surface area of the blowing ring 505. The material distributing block 504 is located on the top surface of the blowing ring 505. The axes of the material distributing block 504 and the blowing ring 505 are collinear with the axis of the blanking pipe 203. The bottom surface area of the material distributing block 504 is larger than the top surface area of the blowing ring 505. A plurality of air guiding holes 506 penetrating from the conical surface to its bottom surface are formed in the conical surface of the blowing ring 505. The plurality of air guiding holes 506 are all curved and are evenly distributed along the conical surface of the blowing ring. The material distributing block 504 is conical and its axis is collinear with the axis of the blanking pipe. The materials falling through the blanking pipe are evenly distributed along the conical surface of the material distributing block. The bottom diameter of the material distributing block 504 is larger than the pipe orifice diameter of the outlet end of the blanking pipe 2. The materials falling through the blanking pipe 2 are evenly distributed along the conical surface of the material distributing block 504. The blowing ring 505 is provided with a conical surface, and the upper end of the conical surface is the small-diameter end and the lower end is the large-diameter end, so that the materials evenly distributed by the material distributing block 504 can freely slide along the conical surface of the blowing ring 505. Through the above settings, the uniformity of blanking distribution can be effectively improved. The air guiding holes 506 are all curved, so that the air flow passing through the air guiding holes 506 can blow the materials in an inclined direction and cooperate with the blades on the cutter head shaft to achieve a good crushing and screening effect.

[0055] In this embodiment, the proportional relationship between the bottom surface area of the material distributing block 504 and the top surface area of the blowing ring 505 is: 1:0.95 - 1:0.8. Through this setting, the bottom surface area of the material distributing block 504 can be slightly larger than the top surface area of the blowing ring 505, ensuring that the materials can slide along the conical surface of the material distributing block 504 to the conical surface of the blowing ring 505 and avoiding the accumulation of materials at the junction of the material distributing block 504 and the blowing ring 505. The proportional relationship between the top surface area of the blowing ring 505 and the bottom surface area of the blowing ring is: 1:5 - 1:20. The specific ratio needs to be designed according to the size of the angle of repose of the materials to enable the materials to freely slide on the blowing ring.

[0056] Specifically, along the center of the blowing ring 505 to the circumference, the width of the air guiding hole 506 gradually increases. Through this setting in cooperation with the curved structure of the air guiding hole itself, the air flow passing through the air guiding hole is distributed in an inclined direction. Along the top surface to the bottom surface of the blowing ring 505, the width of the air guiding hole 503 gradually increases. Through this setting, it can be avoided that the materials are stuck in the air guiding holes during the falling process.

[0057] Such as Figure 8 and Figure 9As shown, a material discharging and air guiding mechanism is further provided in the blowing and material carrying slag discharging mechanism 5. The material discharging and air guiding mechanism includes a slag discharging plate 507 and an air guiding platform 508. The slag discharging plate 507 is inclinedly arranged in the lower protective shell 501. One side of the slag discharging plate 507 is located below the air inlet 502, and the other side of the slag discharging plate 507 is located below the slag discharging port 503. And the side of the slag discharging plate 507 close to the air inlet 502 is higher than the side close to the slag discharging port 503. The air guiding platform 508 is fixed to the slag discharging plate 507. The axis of the air guiding platform 508 is collinear with the blowing ring 505, and the top surface of the air guiding platform 508 is close to or in contact with the bottom surface of the blowing ring 505. Wherein the air guiding platform 508 is in the shape of a frustum of a cone. The air guiding platform 508 can enable the air coming from the air inlet 502 to be as evenly dispersed on the bottom surface of the blowing ring 505 as possible under the guiding action of the air guiding platform 508, so that the air volume and air speed passing through each air guiding hole 503 are basically the same.

[0058] The blowing and material carrying slag discharging device 5 further includes a returned material coarse crushing device 7. The first end of the returned material coarse crushing device 7 is communicated with the slag discharging port 503, and the second end of the returned material coarse crushing device 7 is communicated with the blanking pipe 2. The returned material coarse crushing device has the functions of returning materials and crushing. The coarsely crushed materials are sent to the blanking pipe for further crushing and screening.

[0059] During specific implementation:

[0060] The top end of the blade crushing and screening device in the present invention is connected to the discharging mechanism 2, and its bottom end is connected to the blowing and material carrying slag discharging mechanism 5. During operation, the air flow enters through the air inlet 502, and the air guiding and speed regulating effects of the air are realized through the air guiding platform 508 and the blowing ring 505. The materials (or light materials) after being crushed by the primary crushing system enter through the blanking pipe 203. The distributing block 504 distributes the materials falling from the blanking pipe 203 evenly on the blowing ring 505 below. The air flow blown up by the blowing ring 505 blows the materials in an inclined direction to the cutter head assembly. The cutter head assembly 4 fully impacts the entering biomass materials. The biomass materials subjected to high-speed impact are further crushed and finally discharged from the discharging port 103. The materials that are difficult to crush fall onto the slag discharging plate 507 along the air guiding holes 506 of the blowing ring 505 and are then discharged from the slag discharging port 503 through the slag discharging plate 507. A returned material coarse crushing device 7 can be arranged at the slag discharging port 503 to convey the large particle materials that are difficult to crush to the blanking pipe for re-crushing. During the crushing process, the rotation speed of the driving motor 301 is adjusted to realize stepless control of the rotation speed of the cutter head shaft 401. When it is necessary to change the fineness of the powder or the ventilation resistance, the oil supply amount of the oil cylinder is adjusted through an external oil circuit control system, so that the output shaft of the oil cylinder generates a displacement in the first direction to drive the pressure rod 4022 to rise and fall. Driven by the first connecting rod 4023, the second connecting rod 4024 and the transmission rod 4025, the blades 403 on the cutter head shaft 401 rotate synchronously and are adjusted to the same angle.

[0061] During the adjustment process: Under the action of the high-speed rotation of the blade 403, the rotation of the blade 403 will provide a certain lifting force or resistance to the material rising with the airflow, which may cause the material to easily pass through the intervals between the blades 403 or not easily pass through the intervals between the blades 403, thus playing a role in screening and adjusting the fineness of the material. From another perspective, when the blade 403 rotates, the continuous change of the cutting gap between adjacent blades 403 on the same circumferential surface intercepts the larger particles of the material and continues to cut and break them, and the material meeting the fineness requirements can pass through the cutting gap and be discharged through the discharge port 103, thus playing a role in screening. In addition, if the ventilation resistance is too large or too small, the angle of the blade can also be adjusted to provide a certain lifting force or resistance, realizing the real-time dynamic control of the fineness of the powder in the shell and the ventilation resistance. While meeting the fineness requirements of different working conditions, the stable operation of the entire grinding system is ensured.

[0062] Embodiment 2:

[0063] This embodiment is the same as Embodiment 1 except for the following technical solutions:

[0064] In this embodiment, the size of the cutter head shaft is small, and the driving force of the oil cylinder is strong. By setting a group of adjusting components, all the blades on the cutter head shaft 401 can be driven to rotate synchronously.

[0065] Specifically: The angle adjusting mechanism 402 includes adjusting components; the adjusting components include a driver 303, a pressure rod 4022, a plurality of link components and a plurality of transmission rods 4025; the pressure rod 4022 is distributed along the circumferential direction of the cutter head shaft 401 on the inner wall of the cutter head shaft 401, the output end of the driver 4021 is connected to the pressure rod 4022 to drive the pressure rod 4022 to lift along the first direction, the first ends of the plurality of link components are all hinged to the pressure rod 4022, the second ends of the plurality of link components are respectively connected to the rotation shafts 404 of the blades 403 on the same circumferential surface of the cutter head shaft 401, the plurality of transmission rods 4025 all extend along the first direction, and the plurality of transmission rods 4025 are used to connect one side of the rotation shafts 404 collinear along the first direction, so that the blades 403 collinear along the first direction rotate synchronously. During implementation, the driver 303 is an oil cylinder, the number of the driver 303 and the pressure rod 4022 is one, and the number of the link components and the transmission rods 4025 corresponds to the number of the blades on the same circumferential surface. By controlling the oil supply of the oil cylinder through an external oil circuit control system, the displacement of the output shaft of the oil cylinder is adjusted, so that the output shaft of the oil cylinder generates a displacement along the first direction to drive the pressure rod to lift. Driven by the first link, the second link and the transmission rod, the blades on the cutter head shaft are synchronously adjusted to the same angle. The real-time dynamic control of the ventilation resistance and the fineness of the powder in the shell is realized, and the dynamic balance requirements during the high-speed rotation process are met.

[0066] Embodiment 3:

[0067] This embodiment is the same as embodiment 1 except for the following technical solutions:

[0068] The angle adjustment structure includes an adjustment component; the adjustment component includes a pressure rod 4022, multiple drivers 4021, multiple connecting rod assemblies and multiple transmission rods 4025; in this embodiment, the pressure rod 4022 is annular, and the pressure rod 4022 is arranged on the inner wall of the cutter disc shaft 401 along the circumference of the cutter disc shaft 401, and the output ends of multiple drivers 4021 are connected to the pressure rod 4022 to synchronously drive the pressure rod 4022 to rise and fall along the first direction, the first ends of multiple connecting rod assemblies are hinged to the pressure rod 4022, and the second ends of multiple connecting rod assemblies are connected one-to-one with the rotating shaft 404 of the blade located on the same circumferential surface on the cutter disc shaft 401, and the multiple transmission rods 4025 extend along the first direction, and the multiple transmission rods 4025 are used to connect one side of the rotating shaft 404 that is collinear along the first direction, so that the blades 403 that are collinear along the first direction rotate synchronously. The adjustment assembly in this embodiment can simplify the number of pressure rods 4022 and can also achieve synchronous rotation of all blades 403 on the cutter head shaft 401.

[0069] Example 4:

[0070] This embodiment is the same as embodiment 1 except for the following technical solutions:

[0071] like Figure 11 As shown, the air-blowing and slag-carrying device 5 is the mill's primary crushing system 8. The first housing is directly mounted to the mill's primary crushing system. Material drops through the drop tube 203, is ground and crushed by the mill's primary crushing system, and then is carried diagonally upward by the high-speed airflow of the primary crushing system 8. The cutterhead assembly 4 fully impacts the incoming biomass material, further crushing it under high-speed impact before it is discharged from the discharge port 202 of the upper protective shell 201. Recalcitrant material is discharged through the mill's slag-carrying system or enters the mill's built-in return device for further crushing. During the crushing process, the speed of the cutterhead shaft 401 is adjusted by adjusting the speed of the drive motor 301 to achieve stepless control of its rotation speed. The oil supply to the cylinder is regulated by an external oil control system, allowing the blades 403 on the cutterhead shaft 401 to be synchronously adjusted to a uniform angle. This achieves real-time dynamic control of the ventilation resistance and powder fineness within the housing 1, meeting dynamic balancing requirements during high-speed rotation.

[0072] Example 5:

[0073] This embodiment is the same as embodiment 1 except for the following technical solutions:

[0074] like Figure 12As shown, the blowing and material-carrying slag discharging device 5 is a roller mill 9, and the bottom opening of the first housing 1 is docked with the roller mill 9. During operation, the driving device 901 of the roller mill 9 operates to drive the transmission and support part 902 to operate, thereby driving the grinding table 906 to rotate, and the grinding roller 907 rotates drivenly. The loading device 908 adjusts the grinding roller loading force in real time. The material falls from the feeding pipe 203 and is thrown to the periphery under the centrifugal force of the rotation of the grinding table 906, and then is ground by the grinding roller 907; the air flow enters from the air inlet 909 and is blown upward through the nozzle ring 905, so as to blow the material ground by the grinding roller 907 to the cutter head assembly 4 for secondary grinding, and the impurities that cannot be carried by the air flow are discharged from the slag discharge port 904.

[0075] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A blade crushing and screening device, characterized in that, Comprising: A housing, the axis of the housing extending in a first direction, the interior of the housing being hollow and having a top opening and a bottom opening; the top opening of the housing is used to communicate with a discharging mechanism, and the bottom opening of the housing is used to communicate with a blowing and material-carrying slag-discharging mechanism; A cutter head assembly, the cutter head assembly including a cutter head shaft, an angle adjustment mechanism, and a plurality of blades; the cutter head shaft is disposed inside the housing and collinear with the axis of the housing, a through hole extending in the first direction is opened at the center of the cutter head shaft, the through hole is used to pass through a driving member that drives the cutter head shaft to rotate about its own axis, and a blanking pipe for feeding materials in the direction from the top of the housing to the bottom of the housing is disposed inside this driving member, and a sealed interlayer is formed between the cutter head shaft and this driving member; one end of each of the plurality of blades is rotatably disposed around its own axis on the outer peripheral wall of the cutter head shaft, the other ends of the plurality of blades extend in a direction away from the cutter head shaft, and the angle adjustment mechanism is disposed inside the sealed interlayer and is correspondingly connected to the blades to control the rotation of the blades around their own axes; A conveying assembly, the conveying assembly is disposed above the cutter head shaft, and the conveying assembly is connected to the angle adjustment mechanism for providing a driving force for the angle adjustment mechanism.

2. The blade crushing and screening device according to claim 1, wherein: One end of each of the blades has a rotating shaft, the axis of the rotating shaft is collinear with the axis of the blade and extends in a second direction, and each of the plurality of blades is connected to the angle adjustment mechanism through its own rotating shaft, and the second direction is perpendicular to the first direction.

3. The blade crushing and screening device according to claim 2, characterized in that: The angle adjustment mechanism includes an adjustment assembly; the adjustment assembly includes a driver, a pressure rod, a plurality of link assemblies, and a plurality of transmission rods; the pressure rods are circumferentially distributed on the inner wall of the cutter head shaft along the circumferential direction of the cutter head shaft, the output end of the driver is connected to the pressure rod to drive the pressure rod to move up and down in the first direction, the first ends of the plurality of link assemblies are all hinged to the pressure rod, the second ends of the plurality of link assemblies are correspondingly connected to the rotating shafts of the blades located on the same circumferential surface on the cutter head shaft, the plurality of transmission rods all extend in the first direction, and the plurality of transmission rods are used to connect one side of the rotating shafts collinear in the first direction so that the blades collinear in the first direction rotate synchronously.

4. The blade crushing and screening device according to claim 2, wherein: The angle adjustment mechanism includes a plurality of adjustment assemblies, each adjustment assembly including a driver, a pressure rod, a plurality of link assemblies, and a plurality of transmission rods; the pressure rods in each adjustment assembly are distributed along the same circumferential surface of the cutter head shaft, the output end of the driver is connected to the pressure rod to drive the pressure rod to move up and down in the first direction, the first ends of the plurality of link assemblies are all hinged to the pressure rod, the second ends of the plurality of link assemblies are correspondingly connected to the rotating shafts located on the same circumferential surface on the cutter head shaft, the plurality of transmission rods all extend in the first direction, and the plurality of transmission rods are used to connect one side of the rotating shafts collinear in the first direction so that the blades collinear in the first direction rotate synchronously.

5. The blade crushing and screening device according to claim 2, characterized in that: The angle adjustment structure includes an adjustment component; the adjustment component includes a pressure rod, a plurality of drivers, a plurality of link assemblies, and a plurality of transmission rods; the pressure rod is circumferentially arranged on the inner wall of the cutter head shaft along the circumferential direction of the cutter head shaft, the output ends of the plurality of drivers are all connected to the pressure rod to synchronously drive the pressure rod to lift along the first direction, the first ends of the plurality of link assemblies are all hinged to the pressure rod, the second ends of the plurality of link assemblies are respectively connected to the rotation shafts of the blades located on the same circumferential surface on the cutter head shaft one by one, the plurality of transmission rods all extend along the first direction, and the plurality of transmission rods are used to connect one side of the rotation shafts collinear along the first direction so that the blades collinear along the first direction rotate synchronously.

6. The blade crushing and screening device according to any one of claims 3-5, characterized in that: The link assembly includes a first link and a second link; the first end of the first link is hinged to the pressure rod, the first end of the second link is hinged to the second end of the first link, and the second end of the second link is fixedly connected to the corresponding rotation shaft.

7. The blade crushing and screening device according to any one of claims 3-5, characterized in that: The driver is an oil cylinder; among the oil cylinders of all the adjustment components, the oil inlet of one of the oil cylinders is connected to the conveying component, the oil outlet of this oil cylinder is connected to the oil inlet of the next oil cylinder, and the remaining oil cylinders are connected in series in turn until the oil outlet of the last oil cylinder is connected to the conveying component.

8. The blade crushing and screening device according to claim 7, characterized in that: The conveying component includes a support plate, an oil circuit rotary ring, and an oil circuit conveying ring; the oil circuit rotary ring is fixed in the shell through the support plate, and the oil circuit rotary ring is located above the cutter head shaft. An oil inlet and outlet channel is opened in one of the support plates to connect the oil circuit channel in the oil circuit rotary ring with an external oil supply system. The oil circuit conveying ring is fixed on the upper end surface of the cutter head shaft, and the oil circuit rotary ring and the oil circuit conveying ring are rotatably and sealingly connected. The oil circuit conveying ring is used to connect the oil inlet of one of the oil cylinders and the oil outlet of the last oil cylinder with the oil circuit channel in the oil circuit rotary ring; the central through holes of the oil circuit rotary ring and the oil circuit conveying ring are used for the driving member that drives the cutter head shaft to rotate around its own axis to pass through.

9. The blade crushing and screening device according to claim 8, wherein: The oil conveying channel in the support plate includes an oil inlet pipe and an oil return pipe; an annular oil inlet channel and an annular oil return channel are opened in the oil circuit rotary ring. The oil inlet pipe is connected to the oil inlet channel, and the oil return pipe is connected to the oil return channel; an oil inlet pipeline and an oil return pipeline distributed vertically are opened on the oil circuit conveying ring. The oil inlet pipeline connects the oil inlet channel with the oil inlet of one of the oil cylinders, and the oil return pipeline connects the oil outlet of the last oil cylinder with the oil return channel.

10. The blade crushing and screening device according to claim 1, characterized in that: The inner wall of the shell has a turbulent layer to form turbulence when the material approaches the inner wall of the shell.

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