A counter breaker and a rotor locking mechanism thereof

Abstract

The utility model discloses a counter breaker and rotor locking mechanism thereof, rotor locking mechanism includes rotor subassembly and bearing assembly, and rotor subassembly includes rotor and the turntable of being connected on rotor, is connected with the plate hammer on the turntable, and the rotor rotatable installation is in the crushing chamber of counter breaker, is provided with a circle screw hole on the rotor, bearing assembly includes bearing seat, bearing end cover with bearing seat connection and bearing body setting in bearing seat, and bearing assembly is located the crushing chamber outside of counter breaker, and is provided with arc long waist hole on bearing end cover, wherein, the detachable fixing bolt is connected between screw hole and arc long waist hole, and counter breaker includes above-mentioned rotor locking mechanism.

Description

Technical Field

[0001] This utility model relates to the field of reverse crusher technology, and in particular to a reverse crusher and its rotor locking mechanism. Background Technology

[0002] In mining, construction, and resource recycling, crushers serve as key equipment, undertaking the crucial task of material crushing and processing. Impact crushers are widely used in mines, quarries, and construction waste treatment. However, existing impact crushers present a safety hazard that urgently needs to be addressed. During shutdown maintenance, troubleshooting jams, or routine upkeep, the rotor continues to rotate due to mechanical inertia and other factors. This uncontrolled rotor rotation can easily cause serious mechanical injuries to workers operating near the equipment, significantly threatening their personal safety and impacting the efficiency of equipment maintenance and troubleshooting. Therefore, effectively preventing rotor rotation in non-operating states and ensuring worker safety has become a crucial area for improvement and refinement in the field of impact crusher technology. Utility Model Content

[0003] In view of the shortcomings of the prior art, the purpose of this utility model is to provide an impact crusher and its rotor locking mechanism to solve the existing problem of how to prevent the rotor of the impact crusher from rotating during maintenance.

[0004] A rotor locking mechanism for a crusher includes a rotor assembly and a bearing assembly.

[0005] The rotor assembly includes a rotor and a turntable connected to the rotor. A hammer plate is connected to the turntable. The rotor is rotatably installed in the crushing chamber of the anti-crusher. A ring of threaded holes is provided on the rotor.

[0006] The bearing assembly includes a bearing housing, a bearing end cover connected to the bearing housing, and a bearing body disposed within the bearing housing. The bearing assembly is located outside the crushing chamber of the anti-crusher, and the bearing end cover is provided with an arc-shaped elongated hole.

[0007] A detachable fixing bolt connects the threaded hole and the arc-shaped elongated hole.

[0008] Preferably, the number of the arc-shaped elongated holes is three, and the three arc-shaped elongated holes are arranged in a circular array on the bearing end cover.

[0009] This utility model also provides an anti-crusher, including the anti-crusher rotor locking mechanism described above.

[0010] Preferably, the reverse crusher includes a casing, on which a feed port, a crushing chamber, and a discharge port are provided, the feed port and the discharge port being respectively connected to the crushing chamber.

[0011] Preferably, inspection doors are provided on the side and top of the housing.

[0012] Preferably, an impact frame is connected inside the crushing chamber, an impact plate is connected to the impact frame, an installation hole is provided on the casing, an impact frame adjustment mechanism is connected to the installation hole, and the impact frame adjustment mechanism is connected to the impact frame.

[0013] Preferably, the housing includes a base and an upper shell, one end of which is rotatably mounted on the base.

[0014] This utility model provides an impact crusher and its rotor locking mechanism. A threaded hole is provided on the rotor of the impact crusher, and an arc-shaped elongated hole is provided on the bearing end cover of the impact crusher. By inserting fixing bolts into the threaded hole and the arc-shaped elongated hole, the rotor is fixed to the bearing end cover, so that the rotor of the impact crusher cannot rotate on its own when it is not working. This prevents the rotor from rotating on its own and causing mechanical injury to maintenance personnel during the maintenance of the impact crusher. Attached Figure Description

[0015] Figure 1 A schematic diagram of an anti-crusher structure is provided for an embodiment of this utility model;

[0016] Figure 2 A side view of an anti-crusher provided for an embodiment of this utility model;

[0017] Figure 3 A schematic diagram of the internal structure of an anti-crusher provided in an embodiment of this utility model;

[0018] Figure 4 A schematic diagram of the connection structure of the rotor assembly and bearing assembly provided in an embodiment of this utility model;

[0019] Figure 5 A schematic diagram of the rotor provided for an embodiment of this utility model. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] In the description of this utility model, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "top surface", "bottom surface", "inner", "outer", "inner side", "outer side", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0022] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If the terms "first," "second," and "third" are used in the description, they are for descriptive purposes and to distinguish technical features, and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the sequential relationship of the indicated technical features.

[0023] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "setting" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. The embodiments of this utility model will now be described based on its overall structure.

[0024] See Figure 1 A rotor locking mechanism for an anti-crusher includes a rotor assembly 1 and a bearing assembly 2.

[0025] The rotor assembly 1 includes a rotor 11 and a turntable 12 connected to the rotor 11. A hammer 13 is connected to the turntable 12. The rotor 11 is rotatably installed in the crushing chamber of the crusher. A threaded hole 110 is provided on the rotor 11. The rotor 11 is driven to run by a belt mechanism.

[0026] The bearing assembly 2 includes a bearing housing 21, a bearing end cover 22 connected to the bearing housing 21, and a bearing body disposed within the bearing housing 21. The bearing assembly 2 is located outside the crushing chamber of the reverse crusher, and the bearing end cover 22 is provided with an arc-shaped elongated hole 220.

[0027] A detachable fixing bolt 330 is connected between the threaded hole 110 and the arc-shaped elongated hole 220.

[0028] The rotor 11 is fixed to the bearing end cover 22 by fixing bolts 330, so that the rotor 11 is in a state where it cannot rotate. When the crusher is stopped, stuck, or under maintenance, the rotor 11 is prevented from rotating, thereby preventing injury to the operators caused by the rotor 11 rotating.

[0029] To verify whether the fixing bolts can truly fix the rotor 11 to the bearing end cover 22 without causing it to rotate, a specific implementation method is used for verification, as follows:

[0030] In one specific implementation, the self-weight of the turntable and the four hammers is m = 4246 kg. At this point, the gravity on the rotor is evenly distributed, and the center of gravity is centered above the rotor's center of gravity axis. The weight of a single hammer is 395 kg.

[0031] Considering extreme conditions, such as wear or failure of a single hammer plate, the rotor's self-weight is m1 = 4246 - 395 = 3851 kg. The rotor's center of gravity shifts, generating a lever arm of L1 = 31 mm = 0.031 m. The torque generated by the entire rotor's rotation due to the failure of the single hammer plate is:

[0032] M1=(m1)*g*(L1)=3851*9.8*0.031≈1170N.m.

[0033] At this point, the selection of the fixing bolt 330 is based on the bolt's preload, choosing a fixing bolt 330 that can lock the rotor under extreme conditions, as shown in Table 6-4 below.

[0034] 6-4 Preload F0 of steel bolts for general connections

[0035]

[0036] According to Table 6-4 above, the preload of grade 12.9 M16 is F0 = 120.9 KN = 120900 N. Since the rotor is fixed by bolts and washers, the coefficient of friction between the bolts and washers is μ = 0.3, as shown in the table below.

[0037] Table 6-2 Tightening Torque Coefficient K

[0038]

[0039] Among them, the lever arm L2 between the locking bolt and the central spindle is 72.5mm = 0.0725m. It can be known that the frictional force generated by the locking screw, washer and locking surface is: F1 = (F0) * μ = 120900 * 0.3 = 36270N.

[0040] The torque generated by the locking bolt washer is M2 = (F1) * (L2) = 36270 * 0.0725 ≈ 2630 N·m.

[0041] As can be seen from the above, under extreme conditions, the torque M1 caused by the imbalance due to the failure of the hammer plate is less than the torque M2 caused by the locking bolt washer. The safety factor ratio i = M2 / M1 = 2630 / 1170 ≈ 2.25. Therefore, even under extreme conditions, the rotor can be fixed with M16 bolts of grade 12.9.

[0042] As shown in Tables 6-4 and 6-2, the bolts currently selected are M16 bolts of grade 12.9, with a preload of 120900 N and a friction coefficient of 0.21 for the washer. According to the tightening torque formula T2=K*F0*d, T2=0.21*120900*0.016≈406N.m can be calculated.

[0043] A normal adult can provide a force of about 500N. According to the formula M=L*F, the length of the wrench required for a single adult to clamp the rotor by tightening the bolt is L=M / F=406 / 500≈0.812m.

[0044] In summary, a single adult holding a 0.812m long wrench can lock the rotor from rotating by tightening a 12.9 grade M16 bolt.

[0045] The above provides a specific embodiment. It should be understood that, depending on the actual situation of the rotor of the anti-crusher, the corresponding fixing bolts, threaded holes, and arc-shaped elongated holes should also fall within the scope of protection of this utility model.

[0046] In a preferred embodiment, the number of the arc-shaped elongated holes 220 is three, and the three arc-shaped elongated holes 220 are arranged in a circular array on the bearing end cover 22.

[0047] This embodiment also provides a reverse crusher, including the reverse crusher rotor locking mechanism described above.

[0048] The reverse crusher includes a casing 3, on which a feed port 30, a crushing chamber 31 and a discharge port 32 are provided. The feed port 30 and the discharge port 31 are respectively connected to the crushing chamber 31.

[0049] The crushing chamber 31 is connected to an impact frame 4, and an impact plate 5 is connected to the impact frame 4. The casing 3 is provided with a mounting hole, and an impact frame adjustment mechanism 6 is connected to the mounting hole. The impact frame adjustment mechanism 6 is connected to the impact frame 4.

[0050] During the operation of the impact crusher, the high-speed rotation of the rotor assembly 1 generates a powerful kinetic energy field. Material enters the crushing chamber 31 through the feed inlet 30 and moves towards the discharge outlet 31 along the gap between the impact plate 5 and the rotor assembly 1. In this process, the material is first initially crushed by the impact of the high-speed rotating rotor assembly 1, and then thrown against the impact plate 5, where it undergoes secondary impact crushing. The rebounded material returns to the rotor assembly 1 area for tertiary crushing, while also experiencing mutual impact crushing between materials. This cycle of "impact-rebound-re-crushing" is repeated continuously until the material reaches the predetermined particle size and is finally discharged through the discharge outlet 31.

[0051] The impact frame adjustment mechanism 6 is used to change the gap between the impact plate 5 and the rotor assembly 1 to obtain the required discharge particle size.

[0052] Inspection doors 34 are provided on the side and top of the housing 3.

[0053] The housing 3 includes a base 35 and an upper shell 36, one end of which is rotatably mounted on the base 35.

[0054] Two auxiliary opening mechanisms 7 are connected to the base 35, and the two auxiliary opening mechanisms 7 are located on both sides of the housing 3. When the upper shell 36 is opened, both auxiliary opening mechanisms 7 must operate simultaneously to prevent damage to the upper shell 3 due to inconsistency between the two mechanisms.

[0055] In summary, the present invention provides an impact crusher and its rotor locking mechanism. A threaded hole is provided on the rotor in the rotor assembly of the impact crusher, and an arc-shaped elongated hole is provided on the bearing end cover of the bearing assembly of the impact crusher. The rotor is fixed to the bearing end cover by fixing bolts, which prevents the rotor of the impact crusher from rotating on its own when it is not working, ensures the safety of the staff, and improves the efficiency of equipment maintenance and fault handling.

[0056] The above description is only a specific embodiment of this application. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this application, and these improvements and modifications should also be considered within the scope of protection of this application.

Claims

1. A rotor locking mechanism for a crusher, characterized in that, Including rotor assembly and bearing assembly, The rotor assembly includes a rotor and a turntable connected to the rotor. A hammer plate is connected to the turntable. The rotor is rotatably installed in the crushing chamber of the anti-crusher. A ring of threaded holes is provided on the rotor. The bearing assembly includes a bearing housing, a bearing end cover connected to the bearing housing, and a bearing body disposed within the bearing housing. The bearing assembly is located outside the crushing chamber of the anti-crusher, and the bearing end cover is provided with an arc-shaped elongated hole. A detachable fixing bolt connects the threaded hole and the arc-shaped elongated hole.

2. The rotor locking mechanism for a crusher according to claim 1, characterized in that, The number of the three arc-shaped elongated holes is three, and the three arc-shaped elongated holes are arranged in a circular array on the bearing end cover.

3. A reverse crusher, characterized in that, Includes the anti-crusher rotor locking mechanism as described in any one of claims 1-2.

4. The anti-crusher according to claim 3, characterized in that, The device includes a housing, on which a feed inlet, a crushing chamber, and a discharge outlet are provided, wherein the feed inlet and the discharge outlet are respectively connected to the crushing chamber.

5. The anti-crusher according to claim 4, characterized in that, Inspection doors are provided on the side and top of the housing.

6. The anti-crusher according to claim 4, characterized in that, An impact frame is connected inside the crushing chamber, and an impact plate is connected to the impact frame. The casing is provided with mounting holes, and an impact frame adjustment mechanism is connected to the mounting holes. The impact frame adjustment mechanism is connected to the impact frame.

7. A reverse crusher according to claim 4, characterized in that, The housing includes a base and an upper shell, one end of which is rotatably mounted on the base.

8. The anti-crusher according to claim 7, characterized in that, The base is connected to two auxiliary opening mechanisms, which are located on both sides of the housing.

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