Blade pin shaft mounting structure of hammer mill

Abstract

The utility model discloses a hammer mill blade pin shaft mounting structure which comprises a center shaft, hammer carrier plates, pin shafts and hammer heads, one end of each pin shaft penetrates through the interior of the corresponding hammer head and is movably connected with the corresponding hammer carrier plate, the hammer carrier plates are distributed on the surface of the center shaft, the hammer heads are movably connected with the pin shafts, and the middle sections of the hammer heads abut against protrusions of the pin shafts. And the front end and the rear end of the hammer head and the conical surface of the pin shaft form a gap part for deslagging, and the gap part is trumpet-shaped. According to the blade pin shaft mounting structure of the hammer mill, through the three-section stepped shaft diameter design of the pin shaft, the middle large-diameter section is a main stress area, the two ends of the main stress area and the protrusions and the conical surfaces distributed on the surfaces in a staggered mode, a particle guide channel is formed, and when a hammer head swings, the gap between the through groove and the conical groove dynamically changes to generate a bidirectional extrusion effect; and compared with a traditional optical axis structure, the self-cleaning structure solves the problem that the hammer head deflects due to accumulation and deadlock.

Description

Technical Field

[0001] This utility model relates to the field of crusher blade technology, specifically to a hammer mill blade pin mounting structure. Background Technology

[0002] In traditional shaft-driven hammer mills, hammer jamming leads to rotor dynamic imbalance. Specifically, this manifests as abnormally increased vibration when the equipment is started or restarted after shutdown, and some hammers deviating from the preset angle due to jamming. For example, lateral deflection can disrupt the rotor's symmetry, requiring frequent shutdowns for maintenance.

[0003] The root cause of the above is the intrusion of material particles. During the crushing process, hard particles (quicklime) seep into the gap between the inner hole of the hammer and the pin shaft, and accumulate to form a jam.

[0004] Traditional optical axes have a uniform diameter structure, which prevents particles from being expelled by compression, eventually causing the hammer head and pin to lock together. This requires regular disassembly and cleaning to straighten the hammer head's deflection angle or to replace the hammer head. Utility Model Content

[0005] The purpose of this utility model is to provide a hammer mill blade pin mounting structure to solve the problem mentioned in the background art where hard particles penetrate into the gap between the inner hole of the hammer and the pin during the crushing process, and accumulate and cause jamming.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a hammer mill blade pin mounting structure, comprising a central shaft, a hammer holder plate, a pin, and a hammer head. One end of the pin passes through the interior of the hammer head and is movably connected to the hammer holder plate. The hammer holder plate is distributed on the surface of the central shaft. The hammer head is movably connected to the pin. The middle section of the hammer head abuts against the protrusion of the pin. The front and rear ends of the hammer head and the conical surface of the pin form a gap for slag discharge. This gap is trumpet-shaped.

[0007] As a preferred technical solution of this utility model, the outer surface of the pin has protrusions and conical surfaces arranged alternately.

[0008] Using the above technical solution, the outer surface of the pin is provided with regularly arranged protrusions and conical surfaces, which are staggered and distributed to each other, so that multiple corresponding numbers of hammers can be installed and maintain the same function.

[0009] As a preferred technical solution of this utility model, a through groove is provided inside the hammerhead.

[0010] The above technical solution provides a through groove in the hammer head to allow for lateral movement.

[0011] As a preferred technical solution of this utility model, a movable bearing is provided on the outer surface of the pin, and conical grooves are respectively opened in the movable bearing and the through groove.

[0012] Using the above technical solution, the movable bearing and the through groove move horizontally and squeeze each other through the conical groove, the protrusion and the conical surface, which can crush or push out the lime raw material that has seeped into the through groove.

[0013] As a preferred technical solution of this utility model, the through groove is respectively in contact with the protrusion and the conical cross-section.

[0014] Using the above technical solution, when the hammer head swings and moves laterally, the through groove will continuously come into contact with the protrusion and conical surface of the pin shaft. The gap change caused by the displacement can prevent hard particles from clogging the groove.

[0015] As a preferred technical solution of this utility model, the conical groove is in contact with the protrusion and the conical cross-section respectively.

[0016] As a preferred technical solution of this utility model, the hollow part of the movable bearing is movably inserted into the pin, and one end of the movable bearing is movably fitted with the hammer head.

[0017] Using the above technical solution, the movable bearing has the same conical groove inside. During the pin insertion and removal process, the inclined structure of the outer wall can be used to discharge the lime particles inside the movable bearing.

[0018] As a preferred technical solution of this utility model, the connection between the pin and one end of the hammer frame plate is fixedly installed by a locking component.

[0019] Using the above technical solution, after the pin shaft, hammer frame plate, and hammer head are installed in place, the current position of the pin shaft is fixed by a locking component, which can be a conventional bolt and nut component.

[0020] Compared with the prior art, the beneficial effects of the hammer mill blade pin mounting structure of this utility model are:

[0021] Through the three-section stepped shaft diameter design of the pin, the middle thick diameter section is the main force-bearing area, and the conical slag discharge areas at both ends and the protrusions and conical surfaces distributed alternately on the surface form a particle guiding channel. When the hammer swings, the dynamic change in the gap between the through groove and the conical groove generates a bidirectional squeezing effect, which forces hard particles to be discharged outward along the conical surface at an inclined angle, realizing the gap self-cleaning. Compared with the traditional optical shaft structure, it solves the problem of hammer deflection caused by accumulation and locking. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall three-dimensional structure of the present invention;

[0023] Figure 2 This is a schematic diagram of the overall internal structure of this utility model from the front.

[0024] Figure 3 This is a schematic diagram of the internal cross-sectional structure of the hammer head and through groove of this utility model;

[0025] Figure 4 This is a schematic diagram of the connection structure between the pin and the hammer head of this utility model.

[0026] In the diagram: 1. Central shaft; 2. Hammer holder plate; 3. Pin; 4. Movable bearing; 5. Locking element; 6. Hammer head; 7. Through groove; 8. Conical groove; 9. Protrusion; 10. Conical surface. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0028] Please see Figure 1-4 This utility model provides a technical solution: a hammer mill blade pin mounting structure, including a central shaft 1, a hammer holder plate 2, a pin 3 and a hammer head 6. One end of the pin 3 passes through the inside of the hammer head 6 and is movably connected to the hammer holder plate 2. The hammer holder plate 2 is distributed on the surface of the central shaft 1. The hammer head 6 is movably connected to the pin 3. The middle section of the hammer head 6 abuts against the protrusion 9 of the pin 3. The front and rear ends of the hammer head 6 and the conical surface 10 of the pin 3 form a gap for slag discharge. This gap is trumpet-shaped.

[0029] Please see Figure 1 The hammerheads 6 are arranged in a horizontal array and are staggered with the hammer frame plate 2 and the movable bearings 4 to form several swing arm structures of the hammerheads 6 that can swing and move horizontally. The swing arm structures can be symmetrically distributed or circularly distributed, depending on actual needs. The movable bearings 4 are fixed on the outer surface of one end of the hammer frame plate 2. When assembling or disassembling the hammerheads 6, simply place the hammerheads 6 between adjacent movable bearings 4 and connect them with pins 3.

[0030] For a systematic coordination of the dynamic slag discharge mechanism of the hammer mill blade pin shaft, please refer to [link / reference]. Figures 2-3 The conical groove 8 on the inner wall of the hammer head 6 works in conjunction with the protrusion 9 and conical surface 10 on the surface of the pin shaft 3 to form a dual objective of preventing jamming. Its core is to reconstruct the single cylindrical shape of the pin shaft 3 into a three-section stepped shaft diameter structure, and to use the natural swing characteristics of the hammer head 6 during operation to prevent the original through groove 7 and the active space of the pin shaft 3 from being jammed by particles. The concave-convex structure formed by the protrusion 9 and conical surface 10 on the outer surface of the pin shaft 3 is used to convert the mechanical movement of the pin shaft 3 and the hammer head 6 into active slag discharge power, thus solving the equipment failure problem caused by the accumulation of hard particles.

[0031] The main body of the pin shaft 3 is designed with a thin middle section and tapered sections at both ends formed by a protrusion 9 and a conical surface 10. The diameter of the thin middle section of the protrusion 9 is slightly smaller than the gap of the inner hole of the hammer head 6. As the main force-bearing area, it directly bears the high-intensity impact load during hammering operations. The tapered surfaces 10 at both ends of the pin shaft 3 gradually expand and form a slag discharge guide channel with the inclined surface of the conical groove 8.

[0032] When the shredder is running, please refer to Figure 3 Hard particles in the material enter the gap between the pin 3 and the inner hole of the through groove 7 along with the high-speed rotating hammer head 6. At this time, the periodic oscillation of the hammer head 6 under the impact reaction force with the material will cause dynamic changes in the gap space between the conical groove 8, the protrusion 9 and the conical surface 10. When the hammer head 6 moves horizontally or axially, it can form a bidirectional squeezing effect on the particles that have penetrated into the through groove 7, forcing the particles to slide along the conical section slope formed by the conical surface 10 and the protrusion 9 and move to the outside of the pin 3. By guiding the particles to move along the path of least resistance, the retention and accumulation of particles in the narrow gap is effectively avoided.

[0033] The gap between the hammer 6 and the pin 3 can be adaptively adjusted with mechanical movement. As the swing amplitude of the hammer 6 changes in real time, the gap width between the pin 3 and the hammer 6 is dynamically adjusted within a small range. This fluctuating spatial change, together with the guidance of the protrusion 9 and the conical surface 10, forms a synergistic effect, so that the particles are thrown out of the gap area before they are mechanically locked, thereby continuously maintaining the clean state of the pin 3 and the hammer 6 of the overall crusher.

[0034] Working Principle: When the equipment starts, the central shaft 1 drives the hammer frame plate 2 and the hammer head 6 mounted on it to rotate at high speed. During the crushing process, hard particles in the material enter the gap between the through groove 7 of the hammer head 6 and the pin shaft 3 with the airflow or impact force. The periodic oscillation of the hammer head 6 when impacting the material causes the gap between the pin shaft 3 and the through groove 7 to change in real time. When the hammer head 6 swings to one side, the inner wall of the through groove 7 contacts the protrusion 9 of the pin shaft 3, forcing the particles to move towards the conical surface 10. When it swings in the opposite direction, the gap formed by the through groove 7 and the conical surface 10 widens, and the particles slide along the conical surface under the action of centrifugal force. During this process, the protrusion 9 acts as a barrier structure to restrict particle retention, and the inclination angle of the conical surface 10 guides the particles to be discharged outward along the path of least resistance. The axial displacement caused by the swing of the hammer head 6 further activates the slag discharge mechanism. When the hammer head 6 moves laterally, it alternately contacts the protrusion 9 and conical surface 10 of the pin 3. The small gap creates bidirectional compression of the particles, forcing them to move outward along the conical surface 10. The conical groove 8 on the inner wall of the movable bearing 4 and the conical surface 10 of the pin 3 form a continuous guide channel. When the pin 3 is subjected to impact vibration, the insertion part of the movable bearing 4 and the pin 3 slides relative to each other. The conical surface structure pushes out the particles that have invaded the bearing. The above-mentioned slag discharge mechanism, the coarse diameter section structure of the main force area of ​​the pin 3, provides rigid support for the conical slag discharge area. After the particles are completely discharged, the locking part 5 fixes the position of the pin 3, ensuring that the hammer head 6 continues to work in a non-jammed state. During maintenance, only the locking part 5 needs to be removed to pull out the pin 3. The shape and structure of the protrusion 9 and the conical surface 10 allow the hammer head 6 to automatically clear the residual particles when it is disengaged.

[0035] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0036] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A hammer mill blade pin mounting structure, comprising a central shaft (1), a hammer holder plate (2), a pin (3), and a hammer head (6), one end of the pin (3) passing through the interior of the hammer head (6) and movably connected to the hammer holder plate (2), the hammer holder plate (2) being distributed on the surface of the central shaft (1), characterized in that: The hammer (6) is movably connected to the pin (3). The middle section of the hammer (6) abuts against the protrusion (9) of the pin (3). The front and rear ends of the hammer (6) and the conical surface (10) of the pin (3) form a gap for slag discharge. The gap is shaped like a trumpet.

2. The hammer mill blade pin mounting structure according to claim 1, characterized in that: The outer surface of the pin (3) has alternating protrusions (9) and conical surfaces (10).

3. The hammer mill blade pin mounting structure according to claim 1, characterized in that: The hammerhead (6) has a through groove (7) inside.

4. The hammer mill blade pin mounting structure according to claim 1, characterized in that: The outer surface of the pin (3) is provided with a movable bearing (4), and the movable bearing (4) and the through groove (7) are respectively provided with conical grooves (8).

5. The hammer mill blade pin mounting structure according to claim 1, characterized in that: The through groove (7) is in contact with the cross sections of the protrusion (9) and the cone (10), respectively.

6. The hammer mill blade pin mounting structure according to claim 1, characterized in that: The conical groove (8) is in contact with the cross sections of the protrusion (9) and the conical surface (10), respectively.

7. The hammer mill blade pin mounting structure according to claim 1, characterized in that: The hollow part of the movable bearing (4) is movably inserted into the pin (3), and one end of the movable bearing (4) is movably fitted with the hammer (6).

8. The hammer mill blade pin mounting structure according to claim 1, characterized in that: The pin (3) is fixedly installed at one end of the connection between the pin (3) and the hammer frame plate (2) by a locking piece (5).

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