Novel middle roll shaft structure

Abstract

The utility model discloses a novel middle roll shaft structure which comprises a driving shaft, a sealing support, a lining plate, a check ring, roll teeth, a roll shaft, a locking disc, a taper key, a sealing device, a pressing plate, a positioning ring and a driven shaft. Two ends of the roll shaft are respectively connected with the driving shaft and the driven shaft through bolts, a radial positioning pin and an axial positioning pin; the roller teeth are fixedly sleeved on the roller shaft in a 180-degree staggered manner, one end, close to the driving shaft, of each roller tooth is sequentially pressed and fixed through a check ring, a locking disc and a taper key, one end, close to the driven shaft, of each roller tooth is sequentially pressed and fixed through a check ring, a positioning ring, a locking disc and a taper key, and a thermal expansion gap is formed between the check ring and the positioning ring; the sealing bracket is supported and connected at two ends of the roller shaft, one side surface close to the roller teeth is fixedly connected with the lining plate through a bolt, the lower end surface of the lining plate is embedded in the groove hole of the check ring, and the other side surface is fixedly connected with the sealing device. The roll shaft structure can bear large torque and material impact force, the crushing efficiency is high, and the crushing granularity can be guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of clinker crushers, and particularly relates to a novel middle-mounted roll shaft structure. Background Technique

[0002] The clinker crusher is a supporting equipment for the clinker cooler, which is divided into a hammer crusher and a roll crusher. The former is mostly equipped at the tail of the cooler, and the latter is called the middle-mounted roll crusher and the tail-mounted roll crusher due to different installation positions. The roll-type clinker crusher has gradually become a new choice for the clinker crushing equipment in the cooler due to its technical advantages such as strong adaptability, strong anti-fault ability, and simple maintenance.

[0003] The existing roll shaft structure of the middle-mounted roll crusher has the following problems:

[0004] 1. The connection between the roll shaft and the shaft head is not firm, the torque borne by the roll shaft is small, and the anti-impact ability is low.

[0005] 2. The roll teeth and the roll shaft have relative movement due to wear, and the roll teeth will have a large slip amount along the axial direction, resulting in low crushing efficiency and inability to guarantee the particle size.

[0006] 3. There is a problem of material leakage at the shaft head connection, and the material leakage will cause damage to the sealing device. Summary of the Invention

[0007] To solve the above technical problems, the utility model provides a novel middle-mounted roll shaft structure.

[0008] The technical solution adopted by the utility model is as follows:

[0009] A novel middle-mounted roll shaft structure includes a driving shaft, a sealing bracket, a lining plate, a retaining ring, roll teeth, a roll shaft, a locking disc, a first inclined key, a sealing device, a pressing plate, a positioning ring, and a driven shaft; both ends of the roll shaft are connected to the driving shaft and the driven shaft respectively through bolts, radial positioning pins, and axial positioning pins; the roll teeth are fixedly sleeved on the roll shaft with a 180-degree stagger, and one end of the roll teeth close to the driving shaft is sequentially pressed and fixed through a retaining ring, a locking disc, and a first inclined key, and one end close to the driven shaft is sequentially pressed and fixed through a retaining ring, a positioning ring, a locking disc, and an inclined key, and a thermal expansion gap is provided between the retaining ring and the positioning ring; the sealing bracket supports both ends of the roll shaft, one side surface of the sealing bracket close to the roll teeth is fixedly connected to the lining plate through bolts, the lining plate is embedded in the groove hole of the retaining ring, the outer side surface of the sealing bracket is fixedly connected to the pressing plate, the outer side surface of the pressing plate is fixedly connected to the sealing device, and the sealing device is sleeved on the roll shaft.

[0010] Furthermore, a through-long inclined key groove is axially formed on the outer circumferential surface of the roll shaft, a central through hole adapted to the roll shaft is arranged inside the roll teeth, a second inclined key is arranged in the central through hole, and the roll teeth are connected to the roll shaft through the second inclined key and the clearance fit of the inclined key groove.

[0011] Further, crushing teeth with the same size and thickness are arranged on the outer circumferential surface of the roller teeth. A first boss is provided on one end face of the roller tooth, and a groove is provided on the other end face. Adjacent roller teeth are connected by fitting the first boss and the groove.

[0012] Further, the connecting bolts and radial positioning pins connecting the roller shaft and the driving shaft are connected into one body by a round steel; the connecting bolts and radial positioning pins connecting the roller shaft and the driven shaft are connected into one body by a round steel.

[0013] Further, the roller shaft is a hollow shaft, and a through-long inclined keyway is axially opened on its outer circumferential surface. A groove hole is circumferentially opened on the outer circumferential surface of the retaining ring, and a key A is provided on the inner circumferential surface. The retaining ring is connected to the roller shaft through the key A and the inclined keyway; a second boss adapted to the central hole of the roller tooth is provided at one end of the retaining ring, and a groove adapted to the locking disc is provided at the other end.

[0014] Further, the lining plate is cast from a heat-resistant and wear-resistant material and is installed at both ends of the crushing surface of the roller shaft. An arc-shaped hole is opened at the bottom of the lining plate, and the arc-shaped hole is arranged in the groove hole of the retaining ring.

[0015] Further, a through-long inclined keyway is axially opened on the outer circumferential surface of the roller shaft. The first inclined key is fixed in the inclined keyway by bolts, and circumferential holes are circumferentially arranged at both ends of the roller shaft; the locking disc includes an upper locking disc and a lower locking disc, and the upper locking disc and the lower locking disc are connected by bolts. A clamping groove adapted to the first inclined key and an annular boss adapted to the circumferential hole of the roller shaft are opened inside.

[0016] Further, a through-long inclined keyway is axially opened on the outer circumferential surface of the roller shaft. A key B is provided inside the positioning ring, and the positioning ring is connected to the roller shaft through the key B and the inclined keyway.

[0017] Further, the driven shaft is arranged in a stepped shaft form with an internal through hole as the cooling air inlet. A first flange and a third boss are configured at the large end. Bolt holes and axial positioning pin holes of the driven shaft are opened on the flange, and a radial positioning pin hole of the driven shaft is opened on the third boss. The driven shaft is connected to the roller shaft through bolts passing through the first flange and positioning pins passing through the positioning pin holes.

[0018] Further, the driving shaft is arranged in a stepped shaft with an internal cooling ventilation hole. A second flange and a fourth boss are configured at the large end. Bolt holes and axial positioning pin holes of the driving shaft are provided on the second flange, and a radial positioning pin hole of the driving shaft is provided on the fourth boss. The driving shaft is connected to the roller shaft through bolts passing through the second flange and positioning pins passing through the positioning pin holes.

[0019] The beneficial effects of the present utility model:

[0020] 1. In this application, the shaft head and the roller shaft are fastened by positioning pins in both the axial and radial directions, which can enable the roller shaft to bear a large torque and also withstand the impact force of the material.

[0021] 2. The setting of the retaining ring and the lining plate can make the extruded material slide down along the groove holes of the retaining ring, thus effectively solving the problem of damage to the sealing device caused by mutual extrusion and leakage of materials.

[0022] 3. The setting of the positioning ring can effectively control the expansion gap between the roller teeth. By measuring the distance "S" between the retaining ring and the positioning ring, the wear condition of the roller teeth can be monitored to ensure the crushing ability of the roller teeth meshing.

[0023] 4. The roller teeth are connected to the roller shaft through a self - contained key, and are fixed tightly at both ends by a retaining ring, a locking disc and a taper key, which can well ensure that there is no large slip along the axial direction and small radial rotation, thereby reducing the wear of the roller teeth, improving the crushing efficiency and ensuring the crushing particle size. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is a schematic structural diagram of a novel middle - mounted roller shaft structure of the present invention.

[0025] Figure 2 is a schematic assembly diagram of the roller shaft and roller teeth.

[0026] Figure 3 is a schematic structural diagram of the roller shaft.

[0027] Figure 4 is a schematic structural diagram of the roller teeth.

[0028] Figure 5 is a schematic structural diagram of the sealing bracket.

[0029] Figure 6 is a schematic structural diagram of the sealing device.

[0030] Figure 7 is a schematic structural diagram of the lining plate.

[0031] Figure 8 is a schematic structural diagram of the retaining ring.

[0032] Figure 9 is a schematic structural diagram of the locking disc

[0033] Figure 10 is a schematic structural diagram of the positioning ring.

[0034] Figure 11 is a schematic structural diagram of the driven shaft.

[0035] Figure 12 is a schematic structural diagram of the driving shaft. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0036] To make the objectives, technical solutions and advantages of the present utility model clearer, the technical solutions of the present utility model will be clearly and completely described below in conjunction with the drawings and a preferred embodiment. Embodiment

[0037] As shown Figure 1 in the figure, a new type of central roll shaft structure includes a driving shaft 1, a sealing bracket 2, a lining plate 3, a retaining ring 4, roll teeth 5, a roll shaft 6, a locking disc 7, a first inclined key 8, a sealing device 9, a pressing plate 10, a round steel 11, a positioning ring 12 and a driven shaft 13. Both ends of the roll shaft 6 are respectively connected to the driving shaft 1 and the driven shaft 13 through bolts and positioning pins; the roll shaft 6 is in the form of a hollow shaft, with a keyway hole and an air outlet opened. The retaining ring 4 and the roll teeth 5 are fixedly installed on the roll shaft 6 through their own keyways, and the roll teeth 5 are staggeredly installed on the roll shaft 6 at 180 degrees, and the retaining ring 4 is only installed at both ends of the roll teeth 5; the lining plate 3 is connected to the sealing bracket 2 through bolts to protect the housing from high temperature and material erosion. The lining plate 3 is arranged in the concave groove of the retaining ring 4 to prevent excessive material leakage; the locking disc 7 is installed at both ends of the roll teeth 5 to mainly fix the roll teeth 5 and the retaining ring 4, and the wear condition of the roll teeth 5 is judged by measuring the gap "S" between the retaining ring 4 and the positioning ring 12. The driven shaft 13 is provided with a cooling air inlet for cooling the roll shaft 6, the roll teeth 5, the driving shaft 1 and the retaining ring 4.

[0038] As shown Figure 2 in the figure, the assembly schematic diagram of the roll shaft and roll teeth: mainly composed of a retaining ring 4, roll teeth 5, a roll shaft 6, a locking disc 7, a first inclined key 8 and a positioning ring 12. The roll teeth 5 are fixedly sleeved on the roll shaft 6 in a staggered manner at 180 degrees. The retaining rings 4 are respectively arranged at both ends of the roll teeth 5. One end of the roll teeth 5 close to the driving shaft 1 is pressed and fixed through the locking disc 7 and the first inclined key 8, and one end close to the driven shaft 13 is pressed and fixed through the locking disc 7, the first inclined key 8 and the positioning ring 12. A thermal expansion gap needs to be set between the positioning ring 12 and the retaining ring 4.

[0039] As shown Figure 3 in the figure, the roll shaft 6 is a hollow shaft, with a ventilation hole 61 axially opened inside, a groove hole, a threaded hole and an axial positioning pin hole 62 opened at the shaft end, and a through-length inclined keyway 63 axially opened on the outer circumferential surface of the roll shaft. The inclined keyway 63 is used for connecting the roll teeth 5 and the retaining ring 4. Bolt positioning holes 64 are added in the inclined keyway 63, and the first inclined key 8 is connected to the bolt positioning holes 64 through bolts; a circumferential hole 65 is opened near the bolt positioning holes 64, and the circumferential hole 65 is used for fixing and positioning the locking disc 7. Cooling ventilation holes 66 and radial positioning pin holes 67 are opened at both ends of the roll shaft, and the axial positioning pin hole 62 and the radial positioning pin hole 67 are used for the fixed connection of the driving shaft 1 and the driven shaft 13.

[0040] As shown Figure 4As shown in the figure, the outer circumferential surface of the roller tooth 5 is provided with crushing teeth 51 of the same size and thickness for multi-directional and multi-angle crushing of materials during the tumbling process; a central through hole adapted to the roller shaft 6 is arranged inside the roller tooth 5, a second inclined key 53 adapted to the inclined key groove 63 of the roller shaft is arranged in the central through hole, a first boss 52 is arranged on one end surface of the roller tooth, and a groove 54 is arranged on the other end surface. The two roller teeth are connected through the first boss 52 and the groove 54 to prevent slippage generated during the operation of the roller tooth 5.

[0041] As Figure 5 shown, the sealing bracket 2 is mainly used to support the sealing device 9 and fixedly connect the lining plate 3. The sealing bracket 2 is welded by steel plates, and a through hole is opened at the center to form a cooling air cavity 21; a flange 23 is arranged at the end surface of the through hole for connecting the pressing plate (10). An air outlet pipe 22 is arranged on the upper side of the cooling air cavity 21.

[0042] As Figure 6 shown, the sealing device 9 is mainly composed of a sealing cover plate 91, packing 92, and a sealing gland 93. The flange of the sealing cover plate 91 is provided with a boss groove for filling the packing 92, and the sealing gland 92 is connected to the sealing cover plate 91 by bolts to press the packing 92 tightly. The sealing device 9 is sleeved on the roller shaft 6 and fixed on the sealing bracket 2 through the pressing plate 10 to achieve rotational sealing between the roller shaft 6 and the sealing bracket 2.

[0043] As Figure 7 shown, the lining plate 3 is cast from heat-resistant and wear-resistant materials and is installed at both ends of the crushing surface of the roller tooth 5. An arc-shaped hole 31 is opened at the bottom of the lining plate 3, and the arc-shaped hole 31 is arranged at the groove 41 of the retaining ring 4 for material sealing.

[0044] As Figure 8 shown, the outer circumferential surface of the retaining ring 4 is circumferentially provided with a groove hole 41, two keys A43 are arranged on the inner circumferential surface, a second boss 42 adapted to the central hole of the roller tooth 5 is arranged at one end of the retaining ring 4, and a groove 44 adapted to the locking disc 7 is arranged at the other end. The groove hole 41 is mainly used for installing the lining plate 3, so that the extruded material can slide down along the groove hole 41. The second boss 42 and the groove 44 are used to connect the locking disc 7 and the roller tooth 5.

[0045] As Figure 9 shown, the locking disc 7 is divided into two parts: an upper locking disc 71 and a lower locking disc 72. Both the upper locking disc 71 and the lower locking disc 72 are provided with a card slot 74 adapted to the first inclined key 8 and a boss 73 adapted to the circumferential hole 65 of the roller shaft. The upper locking disc 71 and the lower locking disc 72 are connected by bolts to lock the retaining ring 4 and the positioning ring 12.

[0046] As Figure 10 shown, a key B121 is arranged inside the positioning ring 12, and the wear condition of the roller tooth 6 is monitored by measuring the distance "S" between the retaining ring 4 and the roller tooth 6.

[0047] As shown Figure 11 in the figure, the driven shaft 13 mainly plays a supporting role, is set in the form of a stepped shaft, has an internal through hole as the air inlet for cooling air, the large end is configured with a first flange 131 and a third boss 132, and the third boss 132 is adapted to the roller groove hole; the first flange 131 is provided with bolt holes adapted to the roller threaded holes and driven axial positioning pin holes adapted to the axial positioning pin holes 62, and the third boss 132 is provided with driven shaft radial positioning pin holes adapted to the radial positioning pin holes 67 of the roller. The positioning pin holes on the third boss 132 and the positioning pin holes on the driven shaft are double-drilled to ensure the manufacturing accuracy. The driven shaft 13 is connected to the roller 6 through bolts passing through its first flange 131 and positioning pins passing through the positioning pin holes. The bolts and positioning pins passing through the first flange 131 are connected into one body by a round steel 11 to ensure that the bolts and positioning pins will not loosen.

[0048] As shown Figure 12 in the figure, the driving shaft 1 is mainly used for power transmission, is set as a stepped shaft, the large end is configured with a second flange 101 and a fourth boss 102, and is internally provided with cooling ventilation holes. The fourth boss 102 is adapted to the roller groove hole; the second flange 101 is provided with bolt holes adapted to the roller threaded holes and driving axial positioning pin holes adapted to the axial positioning pin holes 62, and the fourth boss 102 is provided with driving shaft radial positioning pin holes adapted to the radial positioning pin holes 67 of the roller 6. The positioning pin holes on the fourth boss 102 and the positioning pin holes on the driving shaft are double-drilled to ensure the manufacturing accuracy. The driving shaft 1 is connected to the roller 6 through bolts passing through the second flange 101 and positioning pins passing through the positioning pin holes. The bolts and positioning pins passing through the second flange 101 are connected into one body by a round steel 11 to ensure that the bolts and positioning pins will not loosen.

[0049] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and modifications can be made, and these improvements and modifications are also within the protection scope of the present invention.

Claims

1. A new type of central roller structure, characterized in that: It comprises a driving shaft (1), a sealing bracket (2), a liner (3), a retaining ring (4), a roller tooth (5), a roller shaft (6), a locking plate (7), a first oblique key (8), a sealing device (9), a pressure plate (10), a positioning ring (12) and a driven shaft (13); the two ends of the roller shaft (6) are respectively connected to the driving shaft (1) and the driven shaft (13) by bolts and radial positioning pins and axial positioning pins; the roller tooth (5) is fixedly sleeved on the roller shaft (6) with a 180-degree staggered angle; the end of the roller tooth (5) close to the driving shaft (1) is pressed and fixed by the retaining ring (4), the locking plate (7) and the first oblique key (8) in sequence; the end of the roller tooth (5) close to the driven shaft (13) is pressed and fixed by the retaining ring (4), the positioning ring (12), the locking plate (7) and the first oblique key (8) in sequence; and a thermal expansion gap is provided between the retaining ring (4) and the positioning ring (12); The sealing bracket (2) is supported at both ends of the roller shaft (6). The side of the sealing bracket (2) close to the roller teeth (5) is fixedly connected to the lining plate (3) by bolts. The lining plate (3) is embedded in the groove hole (41) of the retaining ring (4). The other side of the sealing bracket (2) is fixedly connected to the pressure plate (10). The outer side of the pressure plate (10) is fixedly connected to the sealing device (9). The sealing device (9) is sleeved on the roller shaft (6).

2. A novel center roller structure according to claim 1, characterized in that: The outer circumferential surface of the roller shaft (6) is axially provided with a through-length oblique keyway (63); a central through hole adapted to the roller shaft (6) is provided inside the roller tooth (5); a second oblique key (53) is provided in the central through hole; the roller tooth (5) is connected to the roller shaft (6) through a clearance fit between the second oblique key (53) and the oblique keyway (63).

3. A novel center roller structure according to claim 1, characterized in that: Crushing teeth (51) of uniform size and thickness are arranged on the outer circumferential surface of the roller teeth (5); a first boss (52) is provided on one end surface of the roller teeth (5); a groove (54) is provided on the other end surface; two adjacent roller teeth are connected by the first boss (52) and the groove (54).

4. A novel center roller structure according to claim 1, characterized in that: The connecting bolts and radial positioning pins connecting the roller shaft (6) and the driving shaft (1) are connected as a whole through round steel (11); and the connecting bolts and radial positioning pins connecting the roller shaft (6) and the driven shaft (13) are connected as a whole through round steel (11).

5. The novel center roller structure according to claim 1 is characterized in that: The roller shaft (6) is a hollow shaft, and a full-length oblique keyway (63) is axially provided on its outer circumferential surface; a groove hole (41) is circumferentially provided on the outer circumferential surface of the retaining ring (4), and a key A (43) is provided on the inner circumferential surface; the retaining ring (4) is connected to the roller shaft (6) via the key A (43) and the oblique keyway (63); a second boss (42) adapted to the center hole of the roller tooth (5) is provided at one end of the retaining ring (4), and a groove adapted to the locking disk (7) is provided at the other end.

6. A novel center roller structure according to claim 5, characterized in that: The lining plate (3) is cast from a heat-resistant and wear-resistant material and is installed at both ends of the crushing surface of the roller teeth (5). An arc-shaped hole (31) is provided at the bottom of the lining plate (3), and the arc-shaped hole (31) is arranged in a groove hole (41) of the retaining ring (4).

7. The novel center roller structure according to claim 1 is characterized in that: The outer circumferential surface of the roller shaft (6) is axially provided with a through-length oblique key groove (63), the first oblique key (8) is fixed in the oblique key groove (63) by means of bolts, and circumferential holes (65) are circumferentially arranged at both ends of the roller shaft (6); the locking plate (7) comprises an upper locking plate (71) and a lower locking plate (72), the upper locking plate (71) and the lower locking plate (72) are connected by means of bolts, and a slot (74) adapted to the first oblique key (8) and an annular boss (73) adapted to the circumferential hole (65) of the roller shaft are provided inside.

8. The novel center roller structure according to claim 1 is characterized in that: A full-length oblique keyway (63) is axially provided on the outer circumferential surface of the roller shaft (6), a key B (121) is provided inside the positioning ring (12), and the positioning ring (12) is connected to the roller shaft (6) via the key B (121) and the oblique keyway (63).

9. The novel center roller structure according to claim 1 is characterized in that: The driven shaft (13) is arranged in the form of a stepped shaft, with a through hole provided inside as a cooling air inlet, and a first flange (131) and a third boss (132) are arranged at the large end, a bolt hole and an axial positioning pin hole of the driven shaft are provided on the first flange (131), and a radial positioning pin hole of the driven shaft is provided on the third boss (132), and the driven shaft (13) is connected to the roller shaft (6) by means of a bolt passing through the first flange (131) and a positioning pin passing through the positioning pin hole.

10. The novel center roller structure according to claim 1 is characterized in that: The driving shaft (1) is configured as a stepped shaft, with cooling and ventilation holes provided inside, and a second flange (101) and a fourth boss (102) are arranged at the large end, the second flange (101) is provided with bolt holes and a driving axial positioning pin hole, and the fourth boss (102) is provided with a driving shaft radial positioning pin hole, and the driving shaft (1) is connected to the roller shaft (6) via bolts passing through the second flange (101) and positioning pins passing through the positioning pin holes.

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