An improved method of constructing a rotor assembly for a vertical impact crusher and a rotor assembly

Abstract

The application provides an improved method and a rotor assembly of a vertical impact crusher, and belongs to the technical field of sand and gravel aggregate crushing equipment. The improved method of the vertical impact crusher rotor assembly comprises the following steps: increasing the height of an impeller to improve the throughput; increasing the diameter of the impeller to improve the sand production rate; and arranging a balance supporting device at one end of the impeller relative to a main shaft, so that the balance supporting device and the main shaft balance and support the impeller. The application has the advantages of super-high throughput, super-high product rate, super-high shaping effect and super-low maintenance rate.

Description

Technical Field

[0001] This invention relates to the field of sand and gravel aggregate crushing equipment technology, specifically to an improved method for a vertical impact crusher rotor assembly and the rotor assembly itself. Background Technology

[0002] With the widespread adoption of manufactured sand as a substitute for natural river sand, various sand-making equipment has flourished. Vertical shaft impact crushers, due to their unique working principle, can achieve both shaping and sand-making functions, making them particularly popular in the market. However, with the increasing scale and size of various construction projects, such as the construction of concrete dams for hydropower stations and high-standard highways, the requirements for sand particle shape, gradation, capacity, dust content, and trouble-free equipment operation are becoming increasingly stringent. Currently, mainstream vertical shaft impact crushers on the market suffer from limitations in rotor diameter and height, as well as installation structure, resulting in problems such as low capacity, poor particle shape, coarse gradation gaps, high dust content, small feed particle size, rapid wear of vulnerable parts, and frequent malfunctions during production, which no longer meet market demands. Summary of the Invention

[0003] To address the aforementioned technical problems, this invention proposes an improved method and rotor assembly for a vertical impact crusher rotor assembly that achieves ultra-high throughput, ultra-high finished product yield, ultra-high shaping effect, and ultra-low maintenance rate.

[0004] The technical solution of this invention is implemented as follows:

[0005] An improved method for a vertical impact crusher rotor assembly includes:

[0006] Increasing the height of the impeller increases the throughput.

[0007] Increasing the impeller diameter improves the yield of finished sand products.

[0008] A balancing support device is provided at one end of the impeller relative to the main shaft, and the balancing support device and the main shaft provide balanced support for the impeller.

[0009] A rotor assembly, employing the improved method of the above-mentioned vertical impact crusher rotor assembly, includes a pulley, main shaft, impeller, and balance support device arranged coaxially from bottom to top. A panel and a base plate are respectively provided at the upper and lower ends of the impeller, and the balance support device is fixed to the panel. The balance support device includes a bearing housing, a hollow shaft, an upper sealing cover of the impeller, an upper end cover of the impeller, a guide cylinder, an upper sealing sleeve of the impeller, a bearing, a hollow shaft sleeve, and a receiving cylinder, wherein:

[0010] The hollow shaft is fixed on the impeller panel, and the bearing is fitted on the stepped shaft on the outer periphery of the hollow shaft;

[0011] The sealing sleeve on the impeller presses against the inner ring of the bearing and the top of the hollow shaft. The receiving cylinder is fitted inside the hollow shaft, and the flange at the upper end of the receiving cylinder presses against the skirt of the inner ring of the sealing sleeve on the impeller.

[0012] The hollow bushing is fitted around the outer circumference of the hollow shaft and connected to the outer ring of the bearing. A stepped position is provided on the inner edge of the top of the hollow bushing, and the sealing cover on the impeller is seated on the stepped position.

[0013] The hollow bushing is mounted on the crushing chamber housing via a bearing housing. The bearing housing includes a support body that supports the hollow bushing and a boom that fixes the support body to the support of the crushing chamber housing.

[0014] The guide cylinder is fitted inside the receiving cylinder, and the top of the guide cylinder has an extended flange. The flange of the guide cylinder presses against the upper end cover of the impeller.

[0015] Furthermore, the hollow shaft, hollow shaft sleeve, impeller upper sealing sleeve, and impeller upper sealing cover form a cavity, and the partition plate divides the cavity into two parts, namely the upper oil inlet cavity and the lower oil return cavity; the partition plate is provided with oil passage holes, and the hollow shaft sleeve is provided with oil inlet and oil return ports at the positions of the oil inlet cavity and the oil return cavity, respectively, and the bearing is located in the oil inlet cavity.

[0016] Furthermore, the hollow bushing has a double sealing structure on the mounting surface with the hollow shaft; the double sealing structure is set in the annular groove on the hollow bushing and includes a sealing body, which includes a steel frame and a composite material covering the frame. A sealing ring is provided on the outer periphery of the sealing body to seal with the annular groove, and a sealing lip is provided on the inner periphery to contact and seal with the hollow shaft.

[0017] Furthermore, a retaining ring is filled in the gap between the upper sealing sleeve and the upper sealing cover of the impeller. The top surfaces of the upper sealing sleeve, the retaining ring, and the upper sealing cover of the impeller are flush. The upper end cover of the impeller presses against the top surfaces of the upper sealing sleeve, the retaining ring, and the upper sealing cover of the impeller and is fixed on the hollow shaft sleeve. The oil inlet and the oil return are respectively connected to an oil inlet pipe and an oil return pipe, and the oil inlet pipe and the oil return pipe are respectively laid through different booms.

[0018] Furthermore, the mating surfaces of the upper sealing sleeve, upper sealing cover, retaining ring, and upper end cover of the impeller form a staggered labyrinth sealing structure.

[0019] Furthermore, the impeller upper sealing sleeve, receiving cylinder, hollow shaft and impeller are in a relatively fixed state to form a rotating body, which rotates with the main shaft, and the impeller upper sealing cover and impeller upper end cover are both fixedly installed on the hollow shaft sleeve.

[0020] Furthermore, the hollow shaft is detachably connected to the panel at the top of the impeller by bolts, and the upper end of the guide cylinder flange is pressed and fixed to the upper end cover of the impeller by a pressure plate.

[0021] Furthermore, the impeller's panel and base plate are each provided with a side guard plate that is connected end to end to form a circle and covers the edges of the panel and base plate, and the side guard plate is detachably installed on the impeller's panel and base plate by bolts.

[0022] Furthermore, the outlet end of the labyrinth sealing structure is provided with a dustproof ring, which has a semi-enclosed structure to cover the labyrinth gap at the outlet end.

[0023] The beneficial effects of the invention are:

[0024] 1. During the operation of the impeller, the material will quickly accumulate in the impeller cavity as the main shaft rotates at high speed, thereby increasing the load on the impeller. The impeller transmits the load to the bearing through the hollow shaft, so that the impeller will not wobble and cause vibration, thus ensuring the normal operation of the equipment and achieving the purpose of high throughput and high production capacity.

[0025] 2. Increase rotor height to improve throughput; increase rotor diameter to improve sand production yield; optimize material throwing path to improve shaping effect; add rotor panel and bottom plate side guards to prevent accidental wear and reduce maintenance difficulty; add rotor balance support device to prevent excessive accidental vibration caused by increased rotor height and size and significantly increased throughput; at the same time, the balance support device structure design ensures smooth oil inlet and outlet and improves the convenience of replacing vulnerable parts inside the rotor; the double sealing structure adopts a special sealing element body and sealing structure design to ensure the sealing reliability of the lubrication system. Attached Figure Description

[0026] Figure 1 This is a cross-sectional view of the rotor assembly of the vertical impact crusher of the present invention;

[0027] Figure 2 The present invention relates to a vertical impact crusher rotor assembly balance support device. Figure 1 A partial schematic diagram;

[0028] Figure 3 This is a schematic diagram of the upper guard plate of the impeller of the rotor assembly of the vertical impact crusher of the present invention. Detailed Implementation

[0029] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0030] Example 1

[0031] This embodiment provides an improved method for a vertical impact crusher rotor assembly, including:

[0032] Increase the height of impeller 2 to improve throughput;

[0033] Increase the diameter of impeller 2 to improve the sand production yield;

[0034] A balancing support device is provided at one end of the impeller 2 relative to the main shaft 1. The balancing support device and the main shaft 1 provide balanced support for the impeller 2.

[0035] On the one hand, by increasing the height and diameter of impeller 2 to increase the sand production and yield, the passage path of the block material in impeller 2 is extended and the contact points between the block material and impeller 2 are increased, making the stone easier to crush into a polyhedral shape and improving the shaping effect.

[0036] On the other hand, by using a balance support device in conjunction with the main shaft 1 to support both ends of the rotor assembly simultaneously, excessive and unexpected vibrations caused by the increase in rotor height and size and the significant increase in throughput can be prevented, thereby improving the material throughput, yield, and shaping effect of the rotor assembly.

[0037] Example 2

[0038] Please refer to Figures 1 to 3 As shown, this embodiment two provides a rotor assembly after applying the improved method of the vertical impact crusher rotor assembly described above. It includes a pulley, main shaft 1, impeller 2, and balance support device arranged coaxially from bottom to top. A panel and a base plate are respectively provided at the upper and lower ends of the impeller 2, and the balance support device is fixed to the panel. The balance support device includes a bearing seat 4, a hollow shaft 5, an impeller upper sealing cover 6, an impeller upper end cover 7, a guide cylinder 8, an impeller upper sealing sleeve 12, and a bearing.

[0039] 13. Hollow bushing 14 and receiving cylinder 15, wherein:

[0040] Hollow shaft 5 is fixed on impeller 2 panel, and bearing 13 is mounted on stepped shaft on the outer periphery of hollow shaft 5;

[0041] The sealing sleeve 12 on the impeller presses against the inner ring of the bearing 13 and the top of the hollow shaft 5. The receiving cylinder 15 is fitted inside the hollow shaft 5. The flange at the upper end of the receiving cylinder 15 presses against the skirt of the inner ring of the sealing sleeve 12 on the impeller, and the skirt presses against the top of the hollow shaft 5.

[0042] Hollow bushing 14 is fitted around the outer circumference of hollow shaft 5 and connected to the outer ring of bearing 13. A stepped position is provided on the inner edge of the top of hollow bushing 14, and the sealing cover 6 on the impeller is seated on the stepped position.

[0043] The hollow bushing 14 is mounted on the crushing chamber housing 3 via the bearing seat 4. The bearing seat 4 includes a support body that supports the hollow bushing 14 and a boom that fixes the support body to the support of the crushing chamber housing 3. The support is L-shaped, with its bottom welded inside the crushing chamber housing and its upper end provided with a mounting position for connecting to the boom. In this embodiment, the connection is made by bolt fixing.

[0044] The guide cylinder 8 is fitted inside the receiving cylinder 15. The top of the guide cylinder 8 is provided with an extended flange, and the flange of the guide cylinder 8 presses against the upper end cover 7 of the impeller.

[0045] Specifically, the bearing housing 4 is installed on the crushing chamber shell 3 and coaxially positioned directly above the impeller 2. The bottom end of the hollow shaft 5 is fixedly mounted on the panel of the impeller 2. The hollow shaft sleeve 14 is detachably installed inside the bearing housing 4 by bolts. The bearing 13 is installed inside the hollow shaft sleeve 14, and the inner ring of the bearing 13 is fitted onto the hollow shaft 5. The upper impeller cover 7 is installed on the top of the hollow shaft sleeve 14. The receiving cylinder 15 is located inside the hollow shaft 5. The upper impeller sealing sleeve 12 is fitted outside the receiving cylinder 15, and the upper impeller sealing sleeve 12 presses against the inner ring of the bearing 13. The upper impeller sealing sleeve 12 is used to seal the area between the top of the hollow shaft 5 and the upper impeller cover 7. The upper impeller sealing cover 6 is fitted outside the upper impeller sealing sleeve 12 and is used to seal the area between the hollow shaft sleeve 14 and the upper impeller cover 7. The guide cylinder 8 is located inside the receiving cylinder 15, and its top end extends to the top of the upper impeller cover 7 and is fixed thereon.

[0046] The hollow shaft 5, hollow shaft sleeve 14, impeller upper sealing sleeve 12, and impeller upper sealing cover 6 form a cavity. A partition divides the cavity into two parts: an upper oil inlet cavity and a lower oil return cavity. The partition has oil passage holes. The hollow shaft sleeve 14 has an oil inlet 16 and an oil return port 17 at the oil inlet and oil return cavity positions, respectively. The bearing 13 is located in the oil inlet cavity. Lubricating oil is pumped into the oil inlet cavity through an external thin oil station to cool the bearing 13. As the bearing 13 rotates, it throws out hot oil, which flows back to the thin oil station through the oil passage holes in the partition and the oil return port 17.

[0047] Example 3

[0048] Please see Figure 2 As shown, this embodiment three is based on the above embodiment two, and a double sealing structure is provided on the assembly surface of the hollow bushing 14 and the hollow shaft 5. The double sealing structure is set in the annular groove on the hollow bushing 14 and includes a sealing body. The sealing body includes a steel frame and a composite material covering the frame. A sealing ring is provided on the outer periphery of the sealing body to seal with the annular groove, and a sealing lip is provided on the inner periphery to contact and seal with the hollow shaft 5.

[0049] The gap between the impeller upper sealing sleeve 12 and the impeller upper sealing cover 6 is filled with a retaining ring 10. The top surfaces of the impeller upper sealing sleeve 12, retaining ring 10, and impeller upper sealing cover 6 are flush. The impeller upper end cover 7 presses against the top surfaces of the impeller upper sealing sleeve 12, retaining ring 10, and impeller upper sealing cover 6 and is fixed to the hollow shaft sleeve 14. The oil inlet 16 and oil return 17 are respectively connected to the oil inlet pipe and the oil return pipe, and the oil inlet pipe and the oil return pipe are laid through different booms. After the crusher starts, the boom is quickly filled with powder, which covers the oil inlet pipe and the oil return pipe. The falling stones will not directly hit the pipes, thus protecting the pipes.

[0050] Specifically, the mating surfaces of the impeller upper sealing sleeve 12, the impeller upper sealing cover 6, the retaining ring 10, and the impeller upper end cover 7 form a staggered labyrinth sealing structure.

[0051] Furthermore, the impeller upper sealing sleeve 12 includes an upper outer ring portion 12-1 and a lower inner ring portion 12-2. The upper outer ring portion 12-1 is located on top of the lower inner ring portion 12-2, and the lower inner ring portion 12-2 is located on top of the hollow shaft 5. A support portion 12-3 extends downward from the outer end of its bottom, pressing against the inner ring of the bearing 13. The inner surface of the upper outer ring portion 12-1 and the top surface of the lower inner ring portion 12-2 form a first annular groove 12-4 with an "L"-shaped cross-section. The top of the receiving cylinder 15 extends outward into the first annular groove 12-4. At least two annular sealing grooves 12-5 are provided on the top of the upper outer ring portion 12-1. The upper end of the impeller... The lower surface of the cover 7 is provided with an annular insertion part 7-1 that inserts into the annular sealing groove 12-5. The outer side of the upper outer ring part 12-1 extends to the area above the region between the inner and outer rings of the bearing 13. The impeller upper sealing cover 6 includes an upper sealing part 6-1 and a lower sealing part 6-2 distributed vertically. The top of the inner surface of the hollow shaft sleeve 14 is provided with a second annular groove 14-1 with an "L" shaped cross section. The upper sealing part 6-1 is located between the second annular groove 14-1 and the inner surface of the impeller upper end cover 7. The outer side of the lower sealing part 6-2 contacts the inner surface of the hollow shaft sleeve 14. The upper sealing part 6-1 is sleeved on the outside of the upper outer ring part 12-1.

[0052] The top of the inner wall of the upper sealing part 6-1, the top and bottom of the outer side of the upper outer ring part 12-1 are respectively provided with a third ring groove 6-3, a fourth ring groove 12-6 and a fifth ring groove 12-7 with an "L" shaped cross section. The bottom of the inner side of the upper sealing part 6-1 is inserted into the fifth ring groove 12-7, and the outer side of the upper outer ring part 12-1 is inserted into the third ring groove 6-3. A retaining ring 10 with an inverted "L" shaped cross section is provided in the third ring groove 6-3, and the top of the inner side of the retaining ring 10 extends into the fourth ring groove 12-6.

[0053] The labyrinth sealing structure includes a dustproof ring 19 at its outlet end, which is semi-enclosed to cover the labyrinth gap at the outlet. The end gap of the labyrinth sealing structure is formed by the mating surfaces of the impeller upper end cover 7 and the impeller upper sealing sleeve 12. The impeller upper end cover 7 and the impeller upper sealing sleeve 12 have embedded structures for the dustproof ring 19, each with two annular grooves. The dustproof ring 19 is embedded within these grooves, thus preventing dust from entering the labyrinth sealing structure.

[0054] Example 4

[0055] Please refer to Figures 1 to 3 As shown, in this fourth embodiment, based on embodiments one to three above, the impeller upper sealing sleeve 12, receiving cylinder 15, hollow shaft 5, and impeller 2 are relatively fixed to form a rotating body that rotates with the main shaft 1. The impeller upper sealing cover 6 and the impeller upper end cover 7 are both fixed to the hollow shaft sleeve 14 by bolts, and the hollow shaft 5 is detachably connected to the panel at the top of the impeller 2 by bolts. The upper end of the guide cylinder 8 is pressed and fixed to the impeller upper end cover 7 by the pressure plate 9. By removing the first bolt 20 that mounts the hollow shaft sleeve 14 to the bearing seat 4, and then removing the second bolt 21 that mounts the hollow shaft 14 to the panel, the balancing device can be quickly removed from the impeller 2, making equipment maintenance and repair more convenient.

[0056] Example 5

[0057] Please refer to Figure 3 As shown, in this fifth embodiment, based on embodiments one to four above, both the impeller 2's panel and base plate are provided with side guard plates 18 that connect end to end to form a ring and cover the edges of the panel and base plate. The side guard plates 18 are detachably installed on the impeller 2's panel and base plate using bolts. The guard plates 18 are fixed to the panel and base plate with bolts. To protect the bolts and prevent deformation from stone impacts that would cause inconvenience in later disassembly and assembly, the bolt mounting holes on the side guard plates are designed with raised slopes around them, allowing the bolts to sink into them. If the side guard plates 18 were the same height as the bolts, the overall weight would increase significantly, increasing the motor load. Therefore, the protrusion is only made at the bolt mounting locations, which protects the bolts, panel, and base plate while also saving energy.

[0058] After applying the above embodiment, the material enters the guide cylinder 8 from the feed hopper 11 and falls into the impeller 2 cavity through the guide cylinder 8. Due to the centrifugal force generated by the high-speed rotation, the material is thrown outwards. At this time, a layer of accumulated material quickly accumulates inside the impeller 2 cavity to protect the cavity from damage caused by the impact of the material. The impeller 2 also experiences increased load due to the accumulated material and the large amount of material passing through it. The impeller 2 transmits the load to the bearing 13 through the hollow shaft 5, preventing the impeller 2 from wobbling and causing vibration, thus ensuring the normal operation of the equipment and achieving the goal of high throughput and high production capacity.

[0059] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A vertical impact crusher rotor assembly, characterized in that: increasing the height of the impeller (2) to increase the throughput; increasing the diameter of the impeller (2) to increase the sand production rate; providing a balance support device at one end of the impeller (2) relative to the main shaft (1), and the balance support device and the main shaft (1) realize the balance support of the impeller (2); The rotor assembly further comprises a belt pulley, a main shaft (1) and an impeller (2), and the belt pulley, the main shaft (1), the impeller (2) and the balance support device are coaxially arranged from bottom to top, and the upper and lower ends of the impeller (2) are respectively provided with a panel and a bottom plate, and the balance support device is fixed on the panel; the balance support device comprises a bearing seat (4), a hollow shaft (5), an impeller upper sealing cover (6), an impeller upper end cover (7), a guide cylinder (8), an impeller upper sealing sleeve (12), a bearing (13), a hollow shaft sleeve (14) and a receiving cylinder (15), wherein: The hollow shaft (5) is fixed on the panel of the impeller (2), and the bearing (13) is sleeved on the stepped shaft outside the hollow shaft (5); The impeller upper sealing sleeve (12) presses the inner ring of the bearing (13) and the top end of the hollow shaft (5), the receiving cylinder (15) is sleeved in the hollow shaft (5), and the flange at the upper end of the receiving cylinder (15) presses the skirt of the inner ring of the impeller upper sealing sleeve (12); The hollow shaft sleeve (14) is sleeved outside the hollow shaft (5) and connected with the outer ring of the bearing (13), and the top end of the hollow shaft sleeve (14) is provided with a stepped position, and the impeller upper sealing cover (6) is seated on the stepped position; The hollow shaft sleeve (14) is installed on the crushing cavity shell (3) through the bearing seat (4), and the bearing seat (4) comprises a support body supporting the hollow shaft sleeve (14), and an arm support fixing the support body on the support of the crushing cavity shell (3); The guide cylinder (8) is sleeved in the receiving cylinder (15), and the guide cylinder (8) is provided with an outwardly extending flange at the top end, and the flange of the guide cylinder (8) is pressed on the impeller upper end cover (7).

2. A vertical shaft impact crusher rotor assembly according to claim 1, characterized in that The hollow shaft (5), the hollow shaft sleeve (14), the impeller upper sealing sleeve (12) and the impeller upper sealing cover (6) form a cavity, and the cavity is divided into an upper oil inlet cavity and a lower oil return cavity by a partition; the partition is provided with an oil passing hole, the hollow shaft sleeve (14) is provided with an oil inlet (16) and an oil return (17) at the positions of the oil inlet cavity and the oil return cavity, and the bearing (13) is located in the oil inlet cavity.

3. A vertical shaft impact crusher rotor assembly according to claim 1, characterized in that The assembly surface of the hollow shaft sleeve (14) and the hollow shaft (5) is provided with a double sealing structure; the double sealing structure is arranged in an annular groove on the hollow shaft sleeve (14) and comprises a sealing member body, the sealing member body comprises a steel structure skeleton and a composite material wrapped outside the skeleton, a sealing ring is arranged on the outer periphery of the sealing member body to seal with the annular groove, and a sealing lip is arranged on the inner periphery to contact and seal with the hollow shaft (5).

4. A vertical shaft impact crusher rotor assembly according to claim 2, characterised in that, The gap between the impeller upper sealing sleeve (12) and the impeller upper sealing cover (6) is filled with a retaining ring (10), the top surfaces of the impeller upper sealing sleeve (12), the retaining ring (10) and the impeller upper sealing cover (6) are flush, the impeller upper end cover (7) presses the top surfaces of the impeller upper sealing sleeve (12), the retaining ring (10) and the impeller upper sealing cover (6) and is fixed on the hollow shaft sleeve (14), the oil inlet (16) and the oil return port (17) are respectively connected with an oil inlet pipe and an oil return pipe, and the oil inlet pipe and the oil return pipe are respectively laid through different arm supports.

5. A vertical shaft impact crusher rotor assembly according to claim 4, characterised in that, The matching surfaces of the impeller upper sealing sleeve (12), the impeller upper sealing cover (6), the retaining ring (10) and the impeller upper end cover (7) form a staggered-tooth-shaped labyrinth seal structure.

6. A vertical shaft impact crusher rotor assembly according to claim 1, characterized in that The impeller upper sealing sleeve (12), the material receiving cylinder (15), the hollow shaft (5) and the impeller (2) are in a relatively fixed state to form a rotating body, which rotates with the main shaft (1), and the impeller upper sealing cover (6) and the impeller upper end cover (7) are fixedly arranged on the hollow shaft sleeve (14).

7. A vertical shaft impact crusher rotor assembly according to claim 6, characterised in that, The hollow shaft (5) and the panel at the top of the impeller (2) are detachably connected through bolts, and the upper end of the flange of the material guide cylinder (8) is tightly fixed on the impeller upper end cover (7) by the pressing plate (9).

8. A vertical shaft impact crusher rotor assembly according to claim 1, characterized in that The panel and the bottom plate of the impeller (2) are respectively provided with edge guard plates (18) which are connected head to tail to enclose a circle and cover the edges of the panel and the bottom plate, and the edge guard plates (18) are detachably mounted on the panel and the bottom plate of the impeller (2) through bolts.

9. A vertical shaft impact crusher rotor assembly according to claim 5, characterized in that The outlet end of the labyrinth seal structure is provided with a dustproof retaining ring (19) which is in a half-enclosing structure and covers the labyrinth gap at the outlet end.

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