Heavy impact crusher

Abstract

According to the heavy impact crusher, the rotor disc is machined and mounted in a segmented mode, the plate hammer and the rotor plate are fixed through the wedge-shaped block, mounting is firm, and dismounting is convenient. Which comprises a shell, a fixed impact lining plate mounted in the shell, a movable impact lining plate and a main shaft rotationally connected with the shell, and is characterized in that a plurality of rotor discs are mounted on the main shaft, a plurality of mounting grooves are uniformly distributed in the rotor discs, plate hammers are mounted in the mounting grooves in the same positions of the rotor discs, trapezoidal grooves are formed in one side surfaces of the plate hammers, and the trapezoidal grooves are matched with the trapezoidal grooves. A plate hammer contact face matched with the side face of the trapezoidal groove is arranged in the installation groove, and a fastening inclined face is arranged on the back side of the plate hammer. Through the segmented installation design of the rotor disc, the rotor disc is installed on the bearing through the main shaft sleeve in an over-constraint mode, so that the plate hammer can bear larger impact force. The cooling air duct is arranged on the back side of the plate hammer, the plate hammer is cooled through air cooling, and the working temperature of the plate hammer is reduced.

Description

Technical Field

[0001] This invention relates to the field of sand and gravel aggregate crushing technology, and in particular to a heavy-duty impact crusher. Background Technology

[0002] Heavy-duty impact crushers (also known as impact crushers) are equipment that uses impact energy to efficiently crush medium-hardness brittle materials. They feature: high crushing ratio (up to 40, far exceeding traditional crushing equipment), effectively reducing crushing steps and simplifying the production process; superior product quality (crushed material is cubic, uniform in size, with minimal over-grinding, no tension or cracks, and excellent particle shape); high efficiency and energy saving (small size, simple structure, low energy consumption, and high production capacity, suitable for large-scale industrial production); and flexible adjustment (by adjusting the gap between the impact frame and the rotor, the discharge particle size can be precisely controlled to meet the finished product specifications required by different industries).

[0003] The impact crusher's crushing process is based on a multi-cycle impact crushing mechanism: Primary impact: Material falls from the top feed inlet into the high-speed rotating rotor and is crushed by the high-speed impact of the hammers. Secondary crushing: The crushed material is thrown against the impact plate, rebounds, and collides again with the hammers or other materials. Vortex crushing: The material forms a vortex between the rotor and the casing, undergoing repeated impacts and friction to achieve fine crushing until the target particle size is reached before discharge. The rotor disc of the heavy-duty impact crusher serves as the carrier for the hammers, and is detachably installed with them. The reliability of the rotor disc and hammer installation directly determines the crushing effect of the hammers. Simultaneously, the installation of the rotor disc and the main shaft is also crucial, as it bears the enormous torque transmitted from the hammers, requiring significant load-bearing capacity as well as ease of installation and disassembly. Summary of the Invention

[0004] In view of the above situation and to overcome the defects of the prior art, the purpose of this invention is to provide a heavy-duty impact crusher with a rotor disc that is processed and installed in sections, which is convenient for installation and processing. The hammer and rotor plate are fixed by wedge blocks, which ensures reliable installation and convenient disassembly.

[0005] The solution is a heavy-duty impact crusher, comprising a shell, a fixed impact liner installed inside the shell, a movable impact liner, and a main shaft rotatably connected to the shell. The main shaft is characterized by having multiple rotor discs mounted on it, with multiple mounting slots evenly distributed on each rotor disc. A hammer is mounted in the mounting slot at the same position on each rotor disc. One side of the hammer has a trapezoidal groove, and the mounting slot has a hammer contact surface that mates with the side of the trapezoidal groove. A fastening inclined surface is provided on the back side of the hammer. The mounting slot has an L-shaped groove, and a wedge block is provided within the L-shaped groove. The inclined surface of the wedge block mates with the fastening inclined surface. The hammer contact surface and the side of the trapezoidal groove, and the inclined surface of the wedge block and the fastening inclined surface of the hammer, mate to fix the hammer.

[0006] Preferably, the back side of the hammer has a V-shaped structure, forming two upper and lower fastening inclined surfaces. The wedge block contacts the fastening inclined surface at the bottom of the hammer. The hammer has a symmetrical structure, with the wedge block and the upper part of the hammer located between the hammer contact surfaces. The two sides of the trapezoidal groove are provided with hammer-fitting protrusions that mate with the hammer contact surfaces. The hammer-fitting protrusions mate with the hammer contact surfaces.

[0007] Preferably, a U-shaped sleeve is fixed on the mounting groove. The U-shaped sleeve is located on the opening side of the trapezoidal groove of the hammer, and the U-shaped groove engages the hammer with the protrusion from one side of the hammer.

[0008] Preferably, the end of the hammer has a trapezoidal structure, consisting of a striking surface, a top surface connected to the striking surface, and a back surface connected to the top surface, with the angle between the top surface and the back surface being greater than 10 degrees and the angle between the striking surface and the top surface being greater than 10 degrees.

[0009] Preferably, a large mounting part is provided on one side of the rotor disk, and a small mounting part is provided on the other side of the rotor disk. The shaft hole of the large mounting part has the same diameter as the shaft hole of the rotor disk and is larger than the diameter of the main shaft. The shaft hole of the small mounting part has the same diameter as the diameter of the main shaft. A mounting sleeve is fitted inside the large mounting part and extends into the adjacent rotor disk. The mounting sleeve is tightly fitted with both the large mounting part and the main shaft. Both ends of the main shaft are fitted with positioning sleeves, which are constrained by the main shaft. The main shaft is fixedly connected to the large mounting part or the small mounting part of the rotor disk by bolts.

[0010] Preferably, the other side of the hammer extends into the bottom of the mounting groove, the bottom of the mounting groove is provided with a fixed support block, the top of the support block is provided with a V-shaped groove structure, the top and back sides of the hammer extending into the mounting groove end are engaged in the V-shaped groove structure of the support block, and the V-shaped groove of the support block is provided with an elastic pad that contacts the top and back sides.

[0011] Preferably, a wind shield plate is fixed on the wedge block. The wind shield plate includes a channel bent plate located on the two rotor discs and in contact with the rotor discs. The end of the channel bent plate is bent to form a bent plate hammer contact part. The channel bent plate and the two sides contact the rotor discs and form rotor disc contact parts. The channel bent plate and two adjacent support blocks form support block contact parts. The wind shield plate is provided with a wedge block fixing part that is fixed to the wedge block. An air duct input plate is installed on the rotor disc near the non-power input end of the main shaft. An air inlet hole is provided on the air duct input end plate. An air duct output plate is fixed on the rotor disc near the power input end of the main shaft. An air outlet hole is provided on the air duct output plate.

[0012] Preferably, each end of the main shaft is equipped with an air-gathering device, which includes an outer air sleeve and an inner air sleeve. The inner and outer air sleeves are coaxially and fixedly connected to the main shaft. Outer support rings are inserted at both ends of the outer air sleeve, and inner support rings are fitted at both ends of the inner air sleeve. The outer and inner support rings are rotatably connected. A sealing slip ring is fitted over the inner sleeve to seal the gap between the outer and inner support rings. The air-gathering device near the non-power input end of the main shaft is connected to the air inlet via an air inlet branch pipe, and the air-gathering device near the power input end of the main shaft is connected to the air outlet via an air outlet branch pipe.

[0013] Preferably, the inner fan sleeve is fixedly connected to the housing. An air inlet pipe is connected to the inner fan sleeve near the non-power output end of the main shaft, and an air outlet pipe is connected to the inner fan sleeve near the power output end of the main shaft. The air inlet pipe is connected to a cooling air system. The inner ring of the outer support ring is provided with a roller inner groove, and the outer ring of the inner support ring is provided with a roller inner groove. A number of rollers are evenly distributed between the roller inner groove and the roller outer groove. A roller retainer for mounting the rollers is provided between the roller inner groove and the roller outer groove.

[0014] The beneficial effects of this invention are as follows: the segmented installation design of the rotor disc makes the production and manufacturing of the rotor disc easier and reduces costs. The rotor disc is mounted on the bearing through the constraint of the main shaft sleeve, which is simple and reliable to install, allowing the hammer to withstand greater impact force. By providing a cooling air channel on the back side of the hammer, the hammer is cooled by air, reducing the working temperature of the hammer and increasing its service life. At the same time, it can also reduce the temperature of the main shaft and main shaft bearing, and increase their service life. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0016] Figure 2 This is a schematic diagram of the spindle installation of the present invention.

[0017] Figure 3 This is a schematic diagram of the rotor disk installation of the present invention.

[0018] Figure 4 For the present invention Figure 3 Right view diagram.

[0019] Figure 5 For the present invention Figure 3 3D schematic diagram.

[0020] Figure 6 This is a schematic diagram of the installation of the wind shield plate of the present invention.

[0021] Figure 7 For the present invention Figure 6 Rear view diagram.

[0022] Figure 8 For the present invention Figure 6 3D schematic diagram.

[0023] Figure 9 This is a three-dimensional schematic diagram of the wind shield plate of the present invention. Detailed Implementation

[0024] The specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

[0025] Depend on Figures 1 to 9 A heavy-duty impact crusher is provided, comprising a housing 1, a fixed impact liner 2 installed inside the housing 1, a movable impact liner 3, and a main shaft 4 rotatably connected to the housing 1. The main shaft 4 is characterized by having multiple rotor discs 5 mounted on it, with multiple mounting grooves 501 evenly distributed on each rotor disc 5. Hammers 6 are mounted in mounting grooves 501 at the same position on each rotor disc 5. One side of each hammer has a trapezoidal groove 601, and the mounting groove contains a hammer contact surface 503 that mates with the side of the trapezoidal groove 601. A fastening inclined surface 602 is provided on the back side of each hammer. The mounting groove 1 has an L-shaped groove 502, and a wedge-shaped block 7 is provided within the L-shaped groove 502. The inclined surface of the wedge-shaped block 7 mates with the fastening inclined surface 602. The hammer contact surface 503, the side of the trapezoidal groove, and the inclined surface of the wedge-shaped block 7 mate with the fastening inclined surface 602 to fix the hammer 6. The wedge block 7 is inserted into the mounting groove 501 from the side of the rotor disk 5, and the hammer 6 is fixed in the mounting groove 501 by tightening the fit. The hammer 6 is mainly fixed by the fastening contact surface formed by the wedge block 7 and the fastening inclined surface 602 of the hammer 6, and by the two fastening contact surfaces formed by the hammer contact surface 503 and the two sides of the trapezoidal groove 601 of the hammer 6. The large mounting contact surface of the hammer 6 makes the installation reliable and can withstand greater crushing impact force. The mounting groove 501 has a U-shaped structure. After the wedge block 7 is inserted, it is fixed to the rotor disk 5 with bolts. The upper part of the movable impact liner 3 is rotatably connected to the housing 1. The housing 1 is equipped with an elastic component 19, and the movable impact liner 3 is rotatably connected to the elastic component 19. The distance between the lower end of the movable impact liner 3 and the rotor disk 5 is adjustable. The wedge block 7 is inserted into the L-shaped groove on one side of the mounting slot 501 with tight constraint from the side of the rotor disk 5. Then, the rotor disk is connected by bolts from one side of the wedge block, and the wedge block 7 is fixedly installed on the rotor disk.

[0026] The back of the hammer 6 has a V-shaped structure, forming two upper and lower fastening inclined surfaces 602. The wedge block 7 contacts the lower fastening inclined surface 602 of the hammer 6. The hammer 6 has a symmetrical structure, with the upper part of the wedge block 7 and the hammer 6 located between the hammer contact surfaces 503. The corresponding surfaces of the hammer with respect to the tip of the V-shaped structure are symmetrical. Two working parts can be formed at the two ends of the hammer, one in the working state and the other extending into the mounting groove 501. When one end of the hammer is worn, the hammer can be replaced so that the other end becomes the main working part. Thus, the hammer can be used twice, reducing production and usage costs.

[0027] The trapezoidal groove 601 has hammer-fitting protrusions 603 on both sides that mate with the hammer contact surface 503, and the hammer-fitting protrusions 603 mate with the hammer contact surface 503.

[0028] A U-shaped sleeve 22 is fixed on the rotor disk 5. The U-shaped sleeve 22 is located on the opening side of the trapezoidal groove 601 of the hammer 6. The U-shaped sleeve 22 engages with the hammer mating protrusion 603 from one side of the hammer 6. The U-shaped sleeve 22 protects the rotor disk 5. It engages with the rotor disk from one side of the mounting groove 501 and is fixed to the rotor disk 5 with bolts. The part of the rotor disk 5 at the mounting groove 501 bears a large impact from the crushed material. The U-shaped sleeve 22 can improve the service life of the rotor disk 5. At the same time, the U-shaped sleeve 22 can fix the hammer 6 along the main shaft 4. A fastening bolt is installed on the side of the U-shaped sleeve 22 near the hammer mating protrusion 603. The fastening bolt presses against one side of the mating protrusion, eliminating the gap between the U-shaped sleeve 22 and the hammer mating protrusion 603, making the hammer 6 more firmly fixed and accurately positioned along the main shaft 4.

[0029] The end of the hammer 6 has a trapezoidal structure, consisting of a striking surface 604, a top surface 605 connected to the striking surface 604, and a back surface 607 connected to the top surface 605. The angle between the top surface 605 and the back surface 607 is greater than 90 degrees, and the angle between the striking surface 604 and the top surface 605 is also greater than 90 degrees. The striking surface 604 is in contact with most of the material to be crushed and is the main working surface of the hammer 6. The angles between the striking surface 604, the top surface 605, and the back surface 607 ensure the most stable structure of the working part of the hammer 6, thus improving the service life of the hammer 6.

[0030] The rotor disk 5 has a large mounting portion 503 on one side and a small mounting portion 504 on the other side. The shaft hole of the large mounting portion 503 has the same diameter as the shaft hole of the rotor disk 5 and is larger than the diameter of the main shaft 4. The shaft hole of the small mounting portion 504 has the same diameter as the main shaft 4. A mounting sleeve is fitted inside the large mounting portion 503, and the mounting sleeve extends into the adjacent rotor disk 5. The mounting sleeve, the large mounting portion 503, and the main shaft 4 are all tightly fitted. When installing the rotor disk 5, the rotor disk 5 is sequentially fitted onto the main shaft 4, and one rotor disk 5 is fixed after being fitted. After the rotor disk 5 is fitted, the mounting sleeve is hammered into the large mounting portion 503. The mounting sleeve enters the mounting hole of the large mounting portion 503 and the rotor disk 5, and then contacts the stepped hole formed by the small mounting portion 504 and the rotor disk. The installation of that rotor disk 5 is then completed, and the next rotor disk 5 is fitted onto it for installation. The outer diameters of the large mounting section 503 and the small mounting section 504 are the same and smaller than the outer diameter of the rotor disk 5.

[0031] Both ends of the main shaft 4 are fitted with positioning sleeves 8, which constrain the main shaft 4. The main shaft 4 is fixedly connected to the large mounting part 503 or the small mounting part 504 of the rotor disk 5 by bolts. The rotor disk 5 is installed on the main shaft 4 sequentially from the non-power input end of the main shaft. First, the positioning sleeves 8 are installed on the non-power input section of the main shaft 4, and then the rotors are installed sequentially. The small mounting part 504 of the rotor disk 5 faces the non-power input end of the main shaft 4.

[0032] The other side of the hammer 6 extends into the bottom of the mounting groove 501. A support block 9 is fixed to the bottom of the mounting groove 501, and the top of the support block 9 has a V-shaped groove structure. The top surface 605 and back surface 607 of the end of the hammer 6 extending into the mounting groove 501 are engaged within the V-shaped groove structure of the support block 9. An elastic pad is provided within the V-shaped groove of the support block 9, contacting the top surface 605 and the back surface 607. During the fixed installation of the hammer 6, the hammer 6 is inserted into the mounting groove 501 of the rotor disk 5, and the support block 9 supports the hammer 6. Then, the U-shaped sleeve 22 is fitted to complete the positioning of the hammer 6 along the main shaft 4. Next, a wedge block 7 is inserted from one side. Due to the elastic pad, the support block 9 will not interfere with the fit between the hammer 6 and the wedge block 7; errors would cause deformation of the elastic pad. After the wedge block 7 is inserted, it is fixed to the rotor disk 5 with bolts.

[0033] A wind shield plate 10 is fixed on the wedge block 7. The wind shield plate 10 includes a channel bent plate 1001 located on the two rotor disks 5 and in contact with the rotor disks 5. The end of the channel bent plate 1001 is bent to form a bent plate hammer contact part. The channel bent plate 1001 and its two sides contact the rotor disks 5 and form rotor disk contact parts. The channel bent plate 1001 and two adjacent support blocks 9 form support block contact parts. The wind shield plate 10 is provided with a wedge block fixing part that is fixed to the wedge block 7. The channel bent plate 1001, the two adjacent rotor disks 5, the two adjacent support blocks 9, and the hammer 6 form a closed channel. The channel bent plate 1001 contacts the back side 607 of the hammer 6. An air duct input plate 11 is installed on the rotor disk 5 near the non-power input end of the main shaft 4. The air duct input plate 11 is provided with an air inlet hole. An air duct output plate 12 is fixed on the rotor disk 5 near the power input end of the main shaft 4. The air duct output plate 12 is provided with an air outlet hole.

[0034] Each hammer 6 has a ventilation duct on its back side. The number of air duct input plates 11 and air duct output plates 12 corresponds one-to-one with the number of hammers 6. The air inlet and air outlet are the same as the corresponding ventilation ducts. Cooling air is input into the air duct through the air inlet and air outlet, which can cool down the hammers 6 and rotor disk 5, reduce the temperature of the hammers 6, improve the performance and service life of the hammers 6, and at the same time effectively prevent the main shaft 4 and the main shaft 4 bearing from overheating, thus extending the service life of the main shaft 4.

[0035] Both ends of the main shaft 4 are equipped with an air-gathering device, which includes an outer air sleeve 13 and an inner air sleeve 14. The inner air sleeve 14 and the outer air sleeve 13 are coaxially and fixedly connected to the main shaft 4. The outer air sleeve 13 has outer support rings 15 inserted at both ends, and the inner air sleeve 14 has inner support rings 16 fitted at both ends. The outer support rings 15 and the inner support rings 16 are rotatably connected. The inner sleeve is covered with a sealing slip ring 23, which seals the gap between the outer support ring 15 and the inner support ring 16. The outer air sleeve 13, the inner air sleeve 14, the two inner support rings 16, and the two outer support rings 15 form an air cavity. The air-gathering device near the non-power input end of the main shaft 4 is connected to the air inlet through the air inlet branch pipe 17, and the air-gathering device near the power input end of the main shaft 4 is connected to the air outlet through the air outlet branch pipe 18.

[0036] The inner air sleeve 14 is fixedly connected to the housing 1. An air inlet pipe 20 is connected to the inner air sleeve 14 near the non-power output end of the main shaft 4, and an air outlet pipe 21 is connected to the inner air sleeve 14 near the power output end of the main shaft 4. The air inlet pipe 20 is connected to a cooling air system. The outer air sleeve 13 can be completely located inside the housing 1, and the inner air sleeve 14 can be completely located inside the housing 1. The air inlet pipe and air outlet pipe connected to the inner air sleeve extend outside the housing, and the air inlet pipe is connected to the cooling air system. The cooling air system, i.e., the air-cooling system, provides cold air to enter the air inlet pipe, then through the air-gathering device into the air inlet branch pipe, and then through the branch pipe 17 into the air chambers formed on the back side of each hammer. The cooling air flows through the air chambers formed on the back side of the hammer into each air outlet branch pipe 18, then into another air-gathering device, and finally the air is discharged outside the housing by the air outlet pipe, completing the cooling of the hammer and the housing, and reducing the temperature of the hammer.

[0037] The outer support ring 15 has an inner roller groove on its inner ring, and the inner support ring 16 has an outer roller groove on its outer ring. Rollers are evenly distributed between the inner and outer roller grooves, and a roller retainer is provided between the inner and outer roller grooves to hold the rollers. The inner support ring 15 and outer support ring 16 support the inner and outer wind sleeves 13 and 14, allowing them to rotate relative to each other. Simultaneously, they can concentrate the air passing behind the hammer within the inner cavity of the air-gathering device.

[0038] The beneficial effects of this invention are as follows: the segmented installation design of the rotor disc makes the production and manufacturing of the rotor disc easier and reduces costs. The rotor disc is mounted on the bearing through the constraint of the main shaft sleeve, which is simple and reliable to install, allowing the hammer to withstand greater impact force. By providing a cooling air channel on the back side of the hammer, the hammer is cooled by air, reducing the working temperature of the hammer and increasing its service life. At the same time, it can also reduce the temperature of the main shaft and main shaft bearing, and increase their service life.

[0039] The embodiments described above are not intended to limit the scope of the present invention. Any modifications and improvements made by those skilled in the art to the technical solutions of the present invention without departing from the inventive concept should be included within the scope of protection defined by the claims of the present invention.

Claims

1. A heavy-duty impact crusher, comprising a shell (1), a fixed impact liner (2) installed inside the shell (1), a movable impact liner (3), and a main shaft (4) rotatably connected to the shell (1), characterized in that, Multiple rotor disks (5) are mounted on the main shaft (4). Multiple mounting slots (501) are evenly distributed on the rotor disks (5). A hammer (6) is mounted on the mounting slot (501) at the same position on the rotor disk (5). A trapezoidal groove (601) is provided on one side of the hammer. A hammer contact surface (503) that cooperates with the side of the trapezoidal groove (601) is provided in the mounting slot. A fastening inclined surface (602) is provided on the back side of the hammer (6). An L-shaped groove (502) is provided in the mounting slot (1). A wedge block (7) is provided in the L-shaped groove (502). The inclined surface of the wedge block (7) cooperates with the fastening inclined surface (602). The hammer contact surface (503) and the side of the trapezoidal groove, and the inclined surface of the wedge block (7) and the fastening inclined surface (602) of the hammer cooperate to fix the hammer (6).

2. The heavy-duty impact crusher according to claim 1, characterized in that, The back side of the hammer (6) has a V-shaped structure, forming two fastening inclined surfaces (602) at the top and bottom. The wedge block (7) contacts the fastening inclined surface (602) at the bottom of the hammer (6). The hammer (6) has a symmetrical structure, and the upper part of the wedge block (7) and the hammer (6) are located between the hammer contact surface (503).

3. The heavy-duty impact crusher according to claim 1, characterized in that, The trapezoidal groove (601) has hammer-fitting protrusions (603) on both sides that mate with the hammer contact surface (503), and the hammer-fitting protrusions (603) and the hammer contact surface (503) are in contact and fit together.

4. The heavy-duty impact crusher according to claim 1, characterized in that, A U-shaped sleeve (22) is fixed on the mounting groove (501). The U-shaped sleeve (22) is located on the opening side of the trapezoidal groove (601) of the hammer (6). The U-shaped groove inserts the hammer fitting protrusion (603) from one side of the hammer (6).

5. The heavy-duty impact crusher according to claim 4, characterized in that, The end of the hammer (6) has a trapezoidal structure, consisting of a striking surface (604), a top surface (605) connected to the striking surface (604), and a back surface (607) connected to the top surface (605). The angle between the top surface (605) and the back surface (607) is greater than 90 degrees, and the angle between the striking surface (604) and the top surface (605) is greater than 90 degrees.

6. The heavy-duty impact crusher according to claim 1, characterized in that, The rotor disk (5) has a large mounting part (503) on one side and a small mounting part (504) on the other side. The shaft hole of the large mounting part (503) has the same diameter as the shaft hole of the rotor disk (5) and is larger than the diameter of the main shaft (4). The shaft hole of the small mounting part (504) has the same diameter as the main shaft (4). The large mounting part (503) is fitted with a mounting sleeve, which extends into the adjacent rotor disk (5). The mounting sleeve is tightly fitted with the large mounting part (503) and the main shaft (4). Both ends of the main shaft (4) are fitted with positioning sleeves (8). The positioning sleeves (8) are tightly fitted with the main shaft (4). The main shaft is fixedly connected to the large mounting part (503) or the small mounting part (504) of the rotor disk (5) by bolts.

7. The heavy-duty impact crusher according to any one of claims 1-6, characterized in that, The other side of the hammer (6) extends into the bottom of the mounting groove (501). A support block (9) is fixed at the bottom of the mounting groove (501). A V-shaped groove structure is provided on the top of the support block (9). The top surface (605) and back surface (607) of the hammer (6) extending into the mounting groove (501) are engaged in the V-shaped groove structure of the support block (9). An elastic pad is provided in the V-shaped groove of the support block (9) to contact the top surface (605) and the back surface (607).

8. The heavy-duty impact crusher according to claim 7, characterized in that, A wind shield plate (10) is fixed on the wedge block (7). The wind shield plate (10) includes a channel bent plate (1001) located on the two rotor disks (5) and in contact with the rotor disks (5). The end of the channel bent plate (1001) is bent to form a bent plate hammer contact part. The channel bent plate (1001) and the two sides are in contact with the rotor disks (5) and form rotor disk contact parts. The channel bent plate (1001) and the two adjacent support blocks (9) form support block contact parts. The wind shield plate (10) is provided with a wedge block fixing part fixed to the wedge block (7). A duct input plate (11) is installed on the rotor disk (5) near the non-power input end of the main shaft (4). The duct input end plate (11) is provided with an air inlet hole. A duct output plate (12) is fixed on the rotor disk (5) near the power input end of the main shaft (4). The duct output plate (12) is provided with an air outlet hole.

9. The heavy-duty impact crusher according to claim 8, characterized in that, Both ends of the main shaft (4) are provided with a wind concentrator. The wind concentrator includes an outer wind sleeve (13) and an inner wind sleeve (14). The inner wind sleeve (14) and the outer wind sleeve (13) are coaxially fixedly connected to the main shaft (4). The outer wind sleeve (13) has an outer support ring (15) inserted at both ends. The inner wind sleeve (14) has an inner support ring (16) fitted at both ends. The outer support ring (15) and the inner support ring (16) are rotatably connected. The inner sleeve is fitted with a sealing slip ring (23). The sealing slip ring (23) seals the gap between the outer support ring (15) and the inner support ring (16). The wind concentrator near the non-power input end of the main shaft (4) is connected to the air inlet through the air inlet branch pipe (17). The wind concentrator near the power input end of the main shaft (4) is connected to the air outlet through the air outlet branch pipe (18).

10. The heavy-duty impact crusher according to claim 9, characterized in that, The inner fan sleeve (14) is fixedly connected to the housing (1). An air inlet pipe (20) is connected to the inner fan sleeve (14) near the non-power output end of the main shaft (4), and an air outlet pipe (21) is connected to the inner fan sleeve (14) near the power output end of the main shaft (4). The air inlet pipe (20) is connected to a cooling air system. The inner ring of the outer support ring (15) is provided with a roller inner groove, and the outer ring of the inner support ring (16) is provided with a roller inner groove. Rollers are evenly distributed between the roller inner groove and the roller outer groove. A roller retainer for mounting the rollers is provided between the roller inner groove and the roller outer groove.

Images