Large disc with lightening holes for ultrafine grinder

Abstract

The utility model provides a large disc with lightening holes for an ultrafine grinder, which relates to a large disc structure and comprises a large disc body which is positioned in the ultrafine grinder and is driven to rotate by a rotary driving group, a plurality of groups of wear-resistant plates are annularly arranged and fixed on the circumferential edge of the large disc body, hammer heads are correspondingly arranged on the edges of the wear-resistant plates, and the wear-resistant plates are fixed on the large disc body. The wear-resisting plate is arranged on the large disc body, the hammer head and the wear-resisting plate are locked on the large disc body through screws, the gravity center of the wear-resisting plate and the gravity center of the hammer head are higher than the horizontal central plane of the large disc body, and the lightening hole is formed in the area, covered by the wear-resisting plate, of the large disc body, so that the using effect of the large disc is improved by removing materials at the small stress position of the area covered by the wear-resisting plate.

Description

TECHNICAL FIELD

[0001] The utility model relates to a big dish structure especially a big dish with weight reduction hole for super micro grinder. BACKGROUND

[0002] In the feed processing and manufacturing industry, because the digestive system of aquatic animals is relatively simple, the feed crushing particle size is required to be fine, and more than 80 mesh or finer particles account for a high proportion, so the feed needs to be super micro-crushed. In addition to improving the mixing uniformity of aquatic feed, super micro-crushed materials are beneficial to the pre-conditioning water and heat absorption, reduce the wear of the extruder, and make the pellet feed have good water stability. At the same time, it also greatly improves the digestion and absorption effect of feed in aquatic animals, and reduces the pollution of the breeding water.

[0003] The material to be crushed enters the super micro grinder through the feed inlet and falls on the high-speed rotating big dish. The hammer heads arranged in a circumferential array are installed on the edge of the big dish, and the hammer heads hit the material at high speed to crush the material. The material is driven by the hammer heads to move at high speed and hit the gear ring, realizing secondary and multiple crushing of the material.

[0004] Under the action of negative pressure, air enters the crushing area from the gap between the high-speed big dish and the gear ring through the lower wind cavity, carries the material into the outer cavity of the flow guide ring, and the movement trajectory of the material in the outer cavity of the flow guide cover is as shown in Figure 6 Under the action of centrifugal force, the material is tightly attached to the inner side of the outer ring plate of the flow guide cover. A part of the material directly spirally moves into the circulating overflow cavity, and a part of the material is bounced by the rib plate of the flow guide cover to change the trajectory and then enters the circulating overflow cavity.

[0005] The material is sucked into the inner cavity of the flow guide cover by negative pressure, the grading wheel rotates and drives the material entering the grading wheel area to rotate together. The particles with small mass have small centrifugal force and are sucked into the inside of the grading wheel, and then discharged from the discharge (wind) port. The particles with large mass have large centrifugal force and are thrown out to the inner cavity of the flow guide cover by the grading wheel, and finally fall on the high-speed big dish and return to the crushing area through the gap between the inner ring plate of the flow guide cover and the high-speed big dish.

[0006] The load borne by the big dish rotating assembly of the super micro grinder is mainly the centrifugal force generated by the high-speed rotation of the big dish, and the second is the load generated by the crushed material. The stress analysis is carried out on the "big dish dangerous section B": F1 is the centrifugal force of the outer part of the dangerous section of the big dish; F2 is the centrifugal force of the wear-resistant plate and the hammer head; F3 is the tangential load equivalent to the hammer head; T is the bending moment generated by F2 relative to the middle plane (horizontal center plane) of the big dish, T=F2*h.

[0007] According to the above, the defects and deficiencies in the prior art are as follows:

[0008] The finite element analysis is carried out on the rotating assembly, and the stress nephogram of the big disc is obtained, wherein: the stress of the stress concentration position of the dangerous section of the big disc is about 170-180Mpa; the stress of many areas in the wear plate covered area of the big disc is close to zero, the material of the area of the big disc is redundant, which is not helpful to the structural strength of the big disc, and the centrifugal force generated by the material in the area introduces unnecessary stress. Practical new type content

[0009] In order to solve the above technical problems, the purpose of the present application is to provide a big disc with weight reduction holes for a super micro grinder, which removes the material at the position with small stress in the wear plate covered area, so as to improve the use effect of the big disc.

[0010] The utility model provides the following technical scheme:

[0011] A big disc with weight reduction holes for a super micro grinder, comprising a big disc body driven to rotate by a rotating drive group in the super micro grinder, a plurality of wear plates are fixed on the circumferential edge of the big disc body in a ring shape, hammer heads are arranged at the edges of the wear plates, and the wear plates and the hammer heads are locked on the big disc body by screws, the centers of gravity of the wear plates and the hammer heads are higher than the horizontal center plane of the big disc body, and weight reduction holes are arranged in the area of the big disc body covered by the wear plates.

[0012] In actual use, the material in the area which does not contribute to the structural strength of the big disc is removed by laser cutting, the cost of laser cutting the weight reduction holes is only about 20 yuan, the moment of inertia of the rotating assembly of the big disc is reduced, so that the no-load power of the driving motor of the big disc can be significantly reduced, and the crushing efficiency of the test prototype can be improved.

[0013] Preferably, the wear plates are provided with eight groups of the same fan-shaped wear plates, the edge arcs of the eight groups of wear plates are connected to form a ring concentric with the big disc body, two groups of the same weight reduction holes are arranged in the area of the big disc body covered by each group of wear plates, and each group of weight reduction holes is also fan-shaped, so as to ensure the structural rotation stability and reduce the quality as much as possible.

[0014] Preferably, a ring-shaped mounting groove is arranged at the peripheral edge of the big disc body, the wear plates are arranged in the mounting groove to form a horizontal plane flush with the top surface of the big disc body, so as to ensure the structural rotation stability and reduce the quality as much as possible.

[0015] Preferably, the rotating driving group comprises a transmission shaft, a cover disc, a tray, and a pulley, the transmission shaft vertically passes through the center of the large disc body, the top end of the transmission shaft is fixed with the cover disc for being crimped on the top side of the large disc body and the tray for being supported on the bottom side of the large disc body, the cover disc, the large disc body and the tray are connected through bolt locking, the transmission shaft is mounted on the base of the super micro pulverizer through a bearing, and the pulley at the bottom end of the transmission shaft drives the large disc body to rotate at high speed in cooperation with the driving motor.

[0016] The utility model discloses a big disc for super micro pulverizer with weight reduction hole, removes the material of the position of less stress of wear plate covering area, thereby improving the use effect of big disc, in actual use, the mass of big disc is reduced about 9% (72kg), the cost of laser cutting weight reduction hole is about 20 yuan, the moment of inertia of big disc rotating assembly is reduced 21%, the no -load power of driving motor of big disc is reduced obviously, the crushing efficiency of test sample machine is improved 4-5%, and the stress nephogram of big disc is obtained through finite element analysis to the rotating assembly of big disc of the utility model, can know that the stress of dangerous cross section stress concentration position on big disc is reduced from 170-180Mpa to 150-160Mpa. BRIEF DESCRIPTION OF DRAWINGS

[0017] The accompanying drawings are included to provide a further understanding of the utility model, and constitute a part of the specification, and are used to explain the utility model together with embodiments of the utility model, and do not constitute the limitation to the utility model. In the drawings:

[0018] Figure 1 It is the structure section view of the transmission shaft drive big disc body one side section rotation structure;

[0019] Figure 2 It is the structure split section view of the utility model big disc;

[0020] Figure 3 It is the structure schematic view of big disc body;

[0021] Figure 4 It is the finite element analysis (without weight reduction hole) view of super micro pulverizer big disc;

[0022] Figure 5 It is the finite element analysis (with weight reduction hole) view of super micro pulverizer big disc;

[0023] Figure 6 It is the movement trajectory diagram of material in the outer cavity of flow guide cover;

[0024] Markings in the drawings:

[0025] 1, big disc body;2, wear plate;3, hammer head;4, weight reduction hole;5, cover disc;6, tray;7, transmission shaft;8, bearing;9, pulley. DETAILED DESCRIPTION

[0026] like Figures 1-6 As shown, a large disc with weight-reducing holes for an ultrafine pulverizer, in this embodiment, includes a large disc body 1 located inside the ultrafine pulverizer and driven to rotate by a rotary drive group. Multiple sets of wear-resistant plates 2 are arranged and fixed along the circumferential edge of the large disc body 1. Hammers 3 are correspondingly arranged at the edge of the wear-resistant plates 2 and are locked to the wear-resistant plates 2 with screws on the large disc body 1. The center of gravity of the wear-resistant plates 2 and the hammers 3 is higher than the horizontal center plane A of the large disc body 1. Weight-reducing holes 4 are opened in the area of ​​the large disc body 1 covered by the wear-resistant plates 2.

[0027] In practical use, laser cutting removes material from areas that do not contribute to the structural strength of the large disk. The cost of laser cutting the weight-reducing hole 4 is only about 20 yuan. The weight of the large disk is reduced, and the rotational inertia of the large disk rotating component is reduced, which ensures that the no-load power of the large disk drive motor is significantly reduced. The crushing efficiency of the test prototype can be improved. Furthermore, finite element analysis of the rotating component of the large disk of this invention and comparison of the stress cloud diagram of the large disk show that the stress at the stress concentration position of the dangerous section B on the large disk has decreased from 170-180 MPa to 150-160 MPa.

[0028] The wear-resistant plate 2 has eight identical sets, which are fan-shaped. The edge arcs of the eight sets of wear-resistant plates 2 are connected end to end to form a ring concentric with the large disc body 1. Each set of wear-resistant plates 2 covers an area of ​​the large disc body 1 and has two identical sets of weight-reducing holes 4. Each set of weight-reducing holes 4 is also fan-shaped, so as to ensure the rotational stability of the structure while minimizing the mass.

[0029] A ring-shaped mounting groove is formed around the perimeter of the large disk body 1. The wear-resistant plate 2 is arranged in the mounting groove to form a horizontal plane with its top surface flush with the top surface of the large disk body 1. This ensures the rotational stability of the structure while minimizing the mass.

[0030] The rotary drive assembly includes a drive shaft 7, a cover plate 5, a tray 6, and a pulley 9. The drive shaft 7 passes vertically through the center of the large disc body 1. The top of the drive shaft 7 is fixed with a cover plate 5 for pressing against the top side of the large disc body 1 and a tray 6 for supporting the bottom side of the large disc body 1. The cover plate 5, the large disc body 1, and the tray 6 are fastened together by bolts. The drive shaft 7 is mounted on the base of the ultrafine pulverizer through a bearing 8, and the pulley 9 at its bottom end is used to cooperate with the drive motor to drive the large disc body 1 to rotate at high speed.

[0031] The working principle of the utility model is: the utility model provides a big disc with weight-reducing holes 4 for a supermicro pulverizer, the material of the position with less stress in the covered area of the wear plate 2 is removed to improve the use effect of the big disc; in actual use, finite element analysis is conducted on the rotating assembly of the big disc of the utility model to obtain the stress nephogram of the big disc, and it is known that the stress of the stress concentration position of the dangerous section B on the big disc is reduced from 170-180Mpa to 150-160Mpa; at the same time, compared with the big disc without holes, the mass is reduced by about 9% (72kg), the moment of inertia of the rotating assembly of the big disc is reduced by 21%, the no-load power of the driving motor of the big disc is significantly reduced, and the pulverizing efficiency of the test prototype is improved by 4-5%.

[0032] The above only is the preferred embodiment of the utility model, and does not limit the utility model, although the utility model is described in detail with reference to the foregoing embodiment, for the person skilled in the art, it still can modify the technical scheme recorded in the foregoing each embodiment, or equivalent replacement is conducted to part of technical features. Any modification, equivalent replacement, improvement etc. made within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A large disc with weight-reducing holes for use in an ultrafine pulverizer, characterized in that, The device includes a large disc body (1) located inside the ultrafine pulverizer and driven to rotate by a rotary drive group. Multiple sets of wear-resistant plates (2) are arranged and fixed along the circumferential edge of the large disc body (1). Hammers (3) are arranged at the edge of the wear-resistant plates (2) and are locked to the wear-resistant plates (2) with screws on the large disc body (1). The center of gravity of the wear-resistant plates (2) and the hammers (3) is higher than the horizontal center plane of the large disc body (1). Weight reduction holes (4) are opened in the area of ​​the large disc body (1) covered by the wear-resistant plates (2).

2. A large disc with weight-reducing holes for an ultrafine pulverizer according to claim 1, characterized in that, The wear-resistant plate (2) is provided in eight identical sets, which are fan-shaped. The edge arcs of the eight sets of wear-resistant plates (2) are connected end to end to form a ring concentric with the large plate body (1). Each set of wear-resistant plates (2) covers the area of ​​the large plate body (1) and has two identical sets of weight-reducing holes (4). Each set of weight-reducing holes (4) is also fan-shaped.

3. A large disc with weight-reducing holes for an ultrafine pulverizer according to claim 2, characterized in that, A ring-shaped mounting groove is provided at the periphery of the large disc body (1), and the wear-resistant plate (2) is arranged in the mounting groove to form a horizontal surface with its top surface flush with the top surface of the large disc body (1).

4. A large disc with weight-reducing holes for an ultrafine pulverizer according to claim 3, characterized in that, The rotary drive assembly includes a drive shaft (7), a cover plate (5), a tray (6), and a pulley (9). The drive shaft (7) passes vertically through the center of the large disc body (1). Its top end is fixed with a cover plate (5) for pressing against the top side of the large disc body (1) and a tray (6) for supporting the bottom side of the large disc body (1). The cover plate (5), the large disc body (1), and the tray (6) are fastened together by bolts. The drive shaft (7) is mounted on the base of the ultrafine pulverizer by a bearing (8), and its bottom end pulley (9) is used to cooperate with the drive motor to drive the large disc body (1) to rotate at high speed.

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