A double rotor impact mill

Abstract

The present invention discloses a dual-rotor impact mill, including an inner rotor motor, a housing, a frame, a central feed V-belt pulley, a feed port, a central vertical shaft, a material distribution cone, an upper support, an inner rotor, an outer rotor, a safety cover, an outer rotor motor, a material discharge port, a positioning locking block, a positioning hinge bolt, and a thin oil supply system, a bearing temperature rise remote monitoring system, and a central vertical shaft deflection remote monitoring system. The central vertical shaft is vertically fixed in the center of the frame, and its top end is connected to a material distribution cone by an internal thread, and its upper end is positioned and fixed by a support ring and a locking round nut in the upper support, and its lower end is fixed to the frame by a positioning locking device. Through the structural design of the positioning locking device, when the dual-rotor impact mill of the present invention is running at high speed and heavy load, the center position of the central vertical shaft can be effectively controlled, and it is also convenient to replace the inner rotor V-belt.

Description

Technical Field

[0001] The invention relates to the technical field of mining equipment, and in particular to a double-rotor impact mill. The double-rotor impact mill can be widely used in the sand making and powder making links of brittle materials such as mines. Background Art

[0002] Impact mills have been widely used in some powder and sand making enterprises in my country because of their energy saving and high efficiency. The representative equipment is the impact grinding equipment based on patent number ZL200620097633.X (frame pre-grinding machine). However, in actual use, there are the following problems:

[0003] 1. Because the impact inner rotor is placed at the upper part of the equipment and the outer rotor is placed at the lower part of the equipment, the longitudinal arrangement of the components requires a large space, the distance between the two ends of the central vertical axis is large, the deflection during operation is large, and the feed port is set on one side of the top, which will cause excessive vibration when encountering large stones or instantaneous excessive feeding;

[0004] Second, because the feed port is offset to one side, the edge impact linear velocity of the inner rotor is higher than 50m / s, the counterattack linear velocity of the outer rotor is higher than 35m / s, and the feed volume exceeds 60t / h. The high speed and heavy load, as well as the unevenness of the feed particle size and the imbalance of the feed weight will cause the impact force on the inner and outer rotors to increase instantly, causing the central vertical shaft of the twin-rotor impact mill to deflect and rotate significantly, forcing it to move or displace, causing the bearing to wear quickly, and the hinge bolts to be pulled out or sheared or even the central vertical shaft to break, which seriously threatens the normal use of the equipment;

[0005] 3. In the design of patent number ZL200620097633.X (frame pre-grinder), a pad is added to the bottom of the central vertical shaft and connected to the base of the frame by bolts in order to facilitate the replacement of the V-belt. However, the working environment of the powder making and sand making site is very harsh (high temperature and high humidity). After working for a long time, the central vertical shaft often has its main weight concentrated on the middle pad due to factors such as vibration. There are also problems such as rust, which makes it difficult to remove the pad, causing certain obstacles to the work of replacing the inner rotor V-belt.

[0006] With the development of remote control technology, impact grinding equipment represented by Patent No. ZL200620097633.X (frame pre-grinder) has also lost its original advantages in the industry. Summary of the invention

[0007] The purpose of the present invention is to provide a double-rotor impact mill in view of the existing technical status, wherein the center position of the central vertical shaft can be effectively controlled during high-speed and heavy-load operation, and the inner rotor V-belt can be easily replaced.

[0008] In order to achieve the above object, the present invention adopts the following technical scheme:

[0009] A dual-rotor impact mill comprises an inner rotor motor, a housing, a frame, a central feed V-belt pulley, a feed port, a central vertical shaft, a material distribution cone, an upper support, an inner rotor, an outer rotor, a safety cover, an outer rotor motor, a material discharge port, a positioning locking block, a positioning hinge bolt, and a thin oil supply system, a bearing temperature rise remote monitoring system and a central vertical shaft deflection remote monitoring system. The central vertical shaft is vertically fixed in the center of the frame, and its top end is connected to a material distribution cone by an internal thread. Its upper end is positioned and fixed by a support ring and a locking round nut in the upper support, and its lower end is connected to the central vertical shaft by a positioning locking device. The frame is fixed, and the inner rotor and the outer rotor are both installed on the central vertical shaft. The outer rotor is arranged on the upper part of the entire equipment and is connected to the extended support of the central feed V-belt pulley. The inner rotor is placed on the inner lower side of the outer rotor. The inner rotor obtains power through the inner rotor V-belt and the V-belt pulley on the inner rotor motor main shaft. The outer rotor obtains power through the outer rotor V-belt and the V-belt pulley on the outer rotor motor main shaft. The positioning locking device at the lower end of the central vertical shaft includes an anti-channeling groove, an anti-twist external hexagon and a positioning locking block, and a positioning hinge bolt processed at the lower end of the central vertical shaft. The anti-channeling groove is located at The lower part of the central vertical shaft and the upper part of the anti-twist external hexagonal body, the anti-twist hexagonal body is an external hexagonal body processed at the bottom end of the central vertical shaft, the anti-channeling groove is a circular groove processed on the central vertical shaft, the positioning locking block is a symmetrical split body, including two cast steel semicircular bodies, the inner cavity is hollow, and the inner cavity wall is provided with an anti-twist internal hexagonal body and an anti-channeling boss, the anti-channeling boss is a circular boss processed on the upper part of the inner cavity of the positioning locking block, and the anti-twist internal hexagonal body is an internal hexagonal body processed at the lower part of the circular boss, the height of the internal hexagonal body in the positioning locking block is greater than the height of the external hexagonal body on the central vertical shaft, and when assembling When the positioning locking block is clamped, the circular boss in the positioning locking block is tightly buckled in the circular groove on the central vertical shaft, and the inner hexagon in the positioning locking block is tightly fitted with the outer hexagon at the lower end of the central vertical shaft, and the two symmetrical split surfaces of the positioning locking block are locked with fastening bolts. After the positioning locking block is clamped, the circular groove and the circular boss cooperate to prevent the central vertical shaft from moving downward or downward, and the inner hexagon cooperates with the outer hexagon to prevent the central vertical shaft from rotating. The longitudinal height of the inner hexagon in the positioning locking block is more than the longitudinal height of the outer hexagon at the lower end of the central vertical shaft by the width of the inner rotor V-belt used.

[0010] Furthermore, the central vertical shaft is a hollow shaft, which is internally provided with eight inlet and outlet copper tubes for bearing oil lubrication and a thermal temperature control device arranged at the opposite position of the bearing. A deflection monitoring device is arranged at the hollow center position of the central vertical shaft. The center of the dividing cone is also hollow. The eight inlet and outlet copper tubes for bearing oil lubrication and the monitoring lines of the thermal temperature control device and the deflection monitoring device are all led out from the center of the dividing cone.

[0011] Furthermore, the inner rotor is composed of a three-level tower, the top of which is a number of scattering vertical plates arranged radially along the center horizontally, and the second and third steps are arranged with impact blocks for re-impacting the materials rebounded by the outer rotor. The central part of the inner rotor is the rotating sleeve, and the bottom end of the rotating sleeve is the inner rotor V-belt pulley.

[0012] Furthermore, the outer ring of the center feed V-belt pulley is a V-belt groove, and the inner ring is provided with four inclined components with the same inclination direction and radial shape. The center of the four inclined components is an upper sleeve for mounting a rolling bearing on the central vertical shaft. The entire component is cast or welded from wear-resistant alloy steel.

[0013] The present invention aims at solving the above-mentioned shortcomings of the existing impact crushing equipment and makes a brand-new design:

[0014] The outer rotor is placed at the upper part of the equipment, and the inner rotor is placed at the inner and lower part of the outer rotor, so that the parts are arranged compactly and reasonably, the supports at both ends of the central vertical shaft are shortened, and the deflection during operation is greatly reduced;

[0015] According to the principle of skin effect, the central vertical shaft is hollowed out, grease lubrication is changed to thin oil lubrication, and the oil pipes entering and exiting the bearing are concentrated in the hollow part of the central vertical shaft to improve the lubrication environment of the equipment and extend the service life of the bearing;

[0016] A thermal sensor is arranged in the hollow part corresponding to the bearing position on the center vertical shaft to monitor the bearing temperature rise and adjust the oil temperature and flow speed of the thin oil in time. A deflection measuring element is arranged at the center of the center vertical shaft to remotely monitor the swing of the center vertical shaft and provide timely feedback on the feed amount and feed size of the feed port, so as to achieve the purpose of real-time control of the equipment and timely feedback and adjustment.

[0017] At the bottom end of the center shaft, an anti-slip circumferential groove and an anti-twist external hexagon are processed. At the same time, a split positioning locking block of the center shaft is designed to prevent the center shaft from twisting and slipping, and it is also more convenient to replace the inner rotor V-belt during equipment maintenance.

[0018] The beneficial effects of the present invention are as follows: through the above design, most of the shortcomings of the existing impact mill in the working process can be effectively controlled, greatly improving the working efficiency and reliability of the equipment. That is, the deflection of the central vertical shaft can be effectively reduced; the lubrication environment of the equipment can be improved; real-time control and timely feedback adjustment of the equipment can be achieved; the longitudinal movement of the central vertical shaft, the swing of the center position and the rotation of the central vertical shaft itself can be prevented, and the damaged inner rotor V-belt can be easily replaced. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Attached Figure 1 It is a structural schematic diagram of the double-rotor impact mill of the present invention;

[0020] Attached Figure 2It is a schematic diagram of the positions of the inner and outer rotors of the present invention;

[0021] Attached Figure 3 It is a schematic structural diagram of the outer rotor of the present invention;

[0022] Attached Figure 4 It is a schematic diagram of the structure of the inner rotor of the present invention;

[0023] Attached Figure 5 It is a structural schematic diagram of the anti-twist and anti-slip device of the present invention;

[0024] Attached Figure 6 It is a structural schematic diagram of the material distribution cone of the present invention;

[0025] Attached Figure 7 It is a cross-sectional view of the distribution cone of the present invention.

[0026] Notes:

[0027] Attached Figure 1 In: 1. Inner rotor motor, 2. Housing, 3. Frame, 4. Center feed V-belt pulley, 5. Feed port, 6. Center vertical shaft, 7. Dividing cone, 8. Upper support, 9. Inner rotor, 10. Outer rotor, 11. Safety cover, 12. Outer rotor motor, 13. Discharge port, 14. Positioning locking block, 15. Positioning hinge bolt.

[0028] Attached Figure 2 Middle: 10, outer rotor, 10-1, outer rotor support, 10-2, pressing inclined block, 10-3, outer rotor center sleeve, 4, center feed V-belt pulley, 9, inner rotor, 9-1, throwing plate, 9-2, impact block.

[0029] Attached Figure 3 Middle: 10-1, outer rotor support, 10-2, pressing inclined block, 10-3, outer rotor center sleeve, 4, center feed V-belt pulley, 10, outer rotor.

[0030] Attached Figure 4 Middle: 9-1, spreading plate, 9-2, impact block, 9-3, inner rotor center sleeve, 9-4, inner rotor V-belt pulley.

[0031] Attached Figure 5 Middle: 6, center vertical axis, 6-1, anti-slip groove, 6-2, anti-twist external hexagon, 6-3, anti-twist internal hexagon, 14, positioning locking block.

[0032] Attached Figure 6 Middle: 7. Dividing cone.

[0033] Attached Figure 7 Middle: 7. Dividing cone. DETAILED DESCRIPTION

[0034] The present invention will be further described below in conjunction with the accompanying drawings.

[0035] Depend on Figure 1 As shown, a twin-rotor impact mill is mainly composed of an inner rotor motor 1, a shell 2, a frame 3, a central feed V-belt pulley 4, a feed port 5, a central vertical shaft 6, a dividing cone 7, an upper support 8, an inner rotor 9, an outer rotor 10, a safety cover 11, an outer rotor motor 12, a discharge port 13, a positioning locking block 14, a positioning hinge bolt 15, and a thin oil supply system, a bearing temperature rise remote monitoring system and a central vertical shaft deflection remote monitoring system.

[0036] Its internal structure is:

[0037] Depend on Figure 1 and Figure 5 As shown, the central vertical shaft 6 is vertically fixed in the center of the frame 3, and its top end is connected to a material dividing cone 7 by an internal thread, and its upper end is positioned and fixed by a support ring and a locking round nut in the upper support 8, and its lower end is fixed to the frame 3 by a positioning and locking device. The inner rotor 9 and the outer rotor 10 are both installed on the central vertical shaft 6, and the outer rotor 10 is arranged at the upper part of the entire equipment and connected to the extended support 10-1 of the central feed V-belt pulley 4. The inner rotor 9 is placed on the lower inner side of the outer rotor 10. The inner rotor 9 obtains power through the inner rotor V-belt and the V-belt pulley on the main shaft of the inner rotor motor 1, and the outer rotor 10 obtains power through the outer rotor V-belt and the V-belt pulley on the main shaft of the outer rotor motor 12.

[0038] The positioning and locking device at the lower end of the central vertical shaft 6 includes an anti-slip groove 6-1, an anti-twist outer hexagon 6-2, a positioning and locking block 14, and a positioning and hinged bolt 15, the anti-slip groove 6-1 is located at the lower part of the central vertical shaft 6 and the upper part of the anti-twist outer hexagon 6-2, the anti-twist outer hexagon 6-2 is an outer hexagon processed at the bottom end of the central vertical shaft 6, and the anti-slip groove 6-1 is a circular groove processed on the central vertical shaft 6. The positioning and locking block 14 is a symmetrical split body, including two cast steel semicircular bodies, the inner cavity of which is hollow, and the inner cavity wall is provided with an anti-twist inner hexagon 6-3 and an anti-slip boss, the anti-slip boss is a circular boss processed at the upper part of the inner cavity of the positioning and locking block 14, the anti-twist inner hexagon 6-3 is an inner hexagon processed at the lower part of the circular boss, and the height of the inner hexagon in the positioning and locking block 14 is greater than the height of the outer hexagon on the central vertical shaft 6.

[0039] During assembly, the circular boss in the positioning locking block 14 is tightly buckled in the circular groove on the central vertical shaft 6, and the inner hexagon in the positioning locking block 14 is tightly fitted with the outer hexagon at the lower end of the central vertical shaft 6, and the two symmetrical split surfaces of the positioning locking block are locked with fastening bolts. After the positioning locking block 14 is clamped, the circular groove and the circular boss cooperate to prevent the central vertical shaft 6 from moving upward or downward, and the inner hexagon cooperates with the outer hexagon to prevent the central vertical shaft 6 from rotating.

[0040] The longitudinal height of the inner hexagon in the positioning locking block 14 is greater than the longitudinal height of the outer hexagon at the lower end of the central vertical shaft 6 by the width of the inner rotor V-belt used, which facilitates the replacement of the inner rotor V-belt during equipment maintenance.

[0041] Depend on Figure 3 As shown, the outer rotor 10 is arranged at the upper part of the whole equipment and is connected with the extended support 10-1 of the center feed V-belt pulley 4. The outer ring of the center feed V-belt pulley 4 is a V-belt groove, and the inner ring is provided with four inclined components 10-2 (for forced feeding) with the same inclination direction and in a radial shape. The center of the four inclined components 10-2 is an outer rotor center sleeve 10-3 with a rolling bearing installed on the center vertical shaft 6. The whole component is cast or welded by wear-resistant alloy steel.

[0042] Depend on Figure 4 As shown, the inner rotor 9 is placed on the lower inner side of the outer rotor 10. The inner rotor 9 is composed of a three-stage tower. The top is a number of scattering vertical plates 9-1 arranged horizontally and radially along the center. The second and third steps are arranged with impact blocks 9-2 for re-impacting the materials impacted by the outer rotor 10. The central part of the inner rotor 9 is a rotating sleeve 9-3, and the bottom end of the rotating sleeve is an inner rotor V-belt pulley 9-4.

[0043] During operation, the material (such as stone) enters the central feed port through the material dividing cone. The outer rotor 10, driven by the outer rotor motor 12, runs at a high speed of more than 30 meters per second. The four inclined components 10-2 arranged at the center of the triangular pulley force the incoming material to be pressed against the scattering plate 9-1 of the inner rotor 9. The inner rotor 9, driven by the inner rotor motor 1, drives the scattering plate 9-1 in the opposite direction of the outer rotor 10 to scatter the material at a high speed to the outer rotor 10 at a linear speed of more than 50 meters per second. The material is immediately counterattacked back to the inner rotor 9 by the outer rotor 10. The counterattack block 9-2 arranged on the second and third steps of the inner rotor 9 counterattacks the material back to the outer rotor 10 again. This process is repeated continuously. At the same time, because the movement trajectory of the material during the impact and counterattack process is chaotic, many materials become curtains in the back and forth impact process, and are repeatedly collided by the impact material and the counterattack material to become dust. Because of the impact, counterattack and material curtain of the material, the energy utilization rate of the equipment is high and the effect is good.

[0044] Depend on Figure 1 and Figure 2 As shown, the inner rotor 9 is arranged inside and below the outer rotor 10, so its structure is extremely compact, which greatly shortens the support distance between the two ends of the central vertical shaft 6, greatly improves the force on the central vertical shaft 6, and greatly reduces the bow deflection during operation.

[0045] Depend on Figure 5As shown, the central vertical shaft 6 is a hollow shaft, and its top end is connected to a material distribution cone 7 by an internal thread. The interior is provided with eight inlet and outlet copper tubes lubricated by thin oil for bearings and a thermal temperature control device arranged at the relative position of the bearings. A deflection monitoring device is arranged at the hollow center position of the central vertical shaft 6. The center of the material distribution cone 7 is also hollow. The eight inlet and outlet copper tubes lubricated by thin oil, the thermal temperature control device and the monitoring lines of the deflection monitoring device are all led out from the center of the material distribution cone 7. Since the oil is supplied externally by grease lubrication, the bearing may be overheated and damaged due to manual negligence or damage to the oil pipe. The above situation can be avoided by arranging the thermal temperature control device and the monitoring line through the hollow central vertical shaft 6 and the material distribution cone.

[0046] During the operation of the equipment, the inner and outer rotors run towards each other at high speed and heavy load. The unevenness of the feed particle size and the imbalance of the feed weight will cause the impact force on the central vertical shaft 6 to increase irregularly and instantaneously. The above structural design can effectively prevent the longitudinal movement of the central vertical shaft 6, the swing of the center position and the rotation of the central vertical shaft 6 itself (large-scale deflection and rotation), thereby ensuring the normal operation of the dual-rotor impact mill. At the same time, it is also convenient to replace the damaged inner rotor V-belt, and only the two parts of the positioning locking block 14 need to be removed.

[0047] Of course, the above are only preferred embodiments of the present invention, and are not intended to limit the scope of use of the present invention. Therefore, any equivalent changes made to the principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A twin-rotor impact mill, comprising an inner rotor motor (1), a housing (2), a frame (3), a central feed V-belt pulley (4), a feed port (5), a central vertical shaft (6), a material distribution cone (7), an upper support (8), an inner rotor (9), an outer rotor (10), a safety cover (11), an outer rotor motor (12), a discharge port (13), a positioning locking block (14), a positioning hinge bolt (15), and a thin oil supply system, a bearing temperature rise remote monitoring system, and a central vertical shaft deflection remote monitoring system, Features: The central vertical shaft (6) is vertically fixed in the center of the frame (3), and its top end is connected to a material distribution cone (7) by an internal thread. Its upper end is positioned and fixed by a support ring and a locking round nut in the upper support (8), and its lower end is fixed to the frame (3) by a positioning and locking device. The inner rotor (9) and the outer rotor (10) are both installed on the central vertical shaft (6). The outer rotor (10) is arranged at the upper part of the entire equipment and is connected to the extended support (10-1) of the central feed V-belt pulley (4). The inner rotor (9) is placed on the inner lower side of the outer rotor (10). The inner rotor (9) is connected to the outer rotor (10) by the inner rotor V-belt. The inner rotor motor (1) obtains power from a V-belt pulley on the main shaft, and the outer rotor (10) obtains power from a V-belt pulley on the main shaft of the outer rotor motor (12). The positioning locking device at the lower end of the central vertical shaft (6) comprises an anti-slip groove (6-1) processed at the lower end of the central vertical shaft (6), an anti-twist external hexagon (6-2), a positioning locking block (14), and a positioning hinge bolt (15). The anti-slip groove (6-1) is located at the lower part of the central vertical shaft (6) and the upper part of the anti-twist external hexagon (6-2). The anti-twist external hexagon (6-2) is a hexagonal external hexagon processed at the bottom end of the central vertical shaft (6). The anti-slip groove (6-1) is a circular groove machined on the central vertical shaft (6). The positioning locking block (14) is a symmetrical split body, including two cast steel semicircular bodies, whose inner cavity is hollow, and the inner cavity wall is provided with an anti-twist inner hexagon (6-3) and an anti-slip boss. The anti-slip boss is a circular boss machined on the upper part of the inner cavity of the positioning locking block (14). The anti-twist inner hexagon (6-3) is an inner hexagonal body machined on the lower part of the circular boss. The height of the inner hexagonal body in the positioning locking block (14) is greater than the height of the outer hexagonal body on the central vertical shaft (6). When assembled, the circular body in the positioning locking block (14) The boss is tightly buckled in the circular groove on the center vertical shaft (6), the inner hexagon in the positioning locking block (14) is tightly fitted with the outer hexagon at the lower end of the center vertical shaft (6), and the two symmetrical split surfaces of the positioning locking block are locked by fastening bolts. After the positioning locking block is clamped, the circular groove and the circular boss cooperate to prevent the center vertical shaft (6) from moving upward or downward, and the inner hexagon and the outer hexagon cooperate to prevent the center vertical shaft (6) from rotating. The longitudinal height of the inner hexagon in the positioning locking block (14) is greater than the longitudinal height of the outer hexagon at the lower end of the center vertical shaft (6) by the width of the inner rotor V-belt used; The central vertical shaft (6) is a hollow shaft, and eight inlet and outlet copper tubes lubricated by thin oil are arranged inside the shaft, and a thermal temperature control device is arranged at a position opposite to the bearing. A deflection monitoring device is arranged at the hollow center of the central vertical shaft (6). The center of the material distribution cone (7) is also hollow. The eight inlet and outlet copper tubes lubricated by thin oil, the thermal temperature control device and the monitoring lines of the deflection monitoring device are all led out from the center of the material distribution cone (7); The inner rotor (9) is composed of a three-stage tower, the top of which is a plurality of scattering vertical plates (9-1) arranged horizontally and radially along the center, and the second and third steps are arranged with impact blocks (9-2) for re-impacting the materials impacted by the outer rotor (10). The central part of the inner rotor (9) is a rotating sleeve (9-3), and the bottom end of the rotating sleeve is an inner rotor V-belt pulley (9-4); The outer ring of the central feed V-belt pulley (4) is a V-belt groove, and the inner ring is provided with four inclined components (10-2) with the same inclination direction and in a radial shape. The center of the four inclined components (10-2) is an upper sleeve (10-3) for mounting a rolling bearing on the central vertical shaft (6). The entire component is cast or welded from wear-resistant alloy steel.

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