Static balance detection device and method for tooth holder of crushing cutter

Abstract

A crushing cutter tooth holder static balance detection device comprises a clamping and fixing mechanism and a balance rack. The clamping and fixing mechanism comprises a first clamping part, a second clamping part and a fixing assembly, the first clamping part and the second clamping part are oppositely arranged, and the fixing assembly penetrates along the axis of the first clamping part and the axis of the second clamping part and fixes the first clamping part and the second clamping part, so that the crushing cutter tooth holder to be detected is fixed; the first clamping part and the second clamping part are rotationally installed on the balance rack. The invention further provides a crushing cutter tooth holder static balance detection method. According to the invention, the concentricity of the to-be-detected crushing cutter tooth holder, the core shaft and the blocking disc can be ensured, so that the accuracy of static balance detection is realized; positioning steps with different diameters are arranged on the plugging disc, so that the tool can be suitable for cutter tooth seats with different apertures, and the universality of the tool is improved; during detection, different types of tools can be switched and installed simply, conveniently and quickly, the interchangeability of the tools and the detection efficiency are improved, and the product quality is ensured.

Description

Technical Field

[0001] The invention relates to the technical field of mining crushers, and in particular to a static balance detection device and method for a crushing cutter tooth seat. Background Art

[0002] In underground operations, the crusher is a large piece of coal crushing equipment used in conjunction with the transfer machine. The crushing shaft group on it is a key component of the crusher. However, due to the complex shape of the crushing tooth seat on the shaft group, there is an uneven mass distribution during casting, and multiple crushing tooth seats are assembled on a crushing shaft group, resulting in an uneven mass distribution in various parts of the crushing shaft group. In actual operation, the shaft group will vibrate due to the uneven mass distribution of the crushing tooth seat, and the vibration will aggravate the wear of components such as the main shaft and bearings, affecting the safe and stable operation of the crusher. In order to reduce vibration, the crushing tooth seat needs to be statically balanced to reduce the centrifugal inertia force caused by mass imbalance to within the allowable range. Summary of the invention

[0003] In order to solve the technical problems existing in the above-mentioned technology, it is necessary to provide a static balance detection device for a crushing cutter tooth seat.

[0004] A static balance detection device for a crushing cutter tooth seat comprises a clamping and fixing mechanism and a balancing stand; the clamping and fixing mechanism comprises a first clamping part, a second clamping part, and a fixing assembly; the first clamping part and the second clamping part are arranged opposite to each other, and the fixing assembly passes through the axis of the first clamping part and the second clamping part, and fixes the first clamping part and the second clamping part, thereby fixing the crushing cutter tooth seat to be detected; the first clamping part and the second clamping part are rotatably mounted on the balancing stand.

[0005] Preferably, the first clamping part and the second clamping part have the same structure, and the first clamping part includes a core shaft and a blocking disk; a limiting disk is provided on the outer wall of one end of the core shaft, and the limiting disk and the outer wall of the core shaft form a recessed platform on which the blocking disk can be installed, and the blocking disk is mounted on the outside of the core shaft and on the limiting disk, and a surface of the blocking disk on one side away from the limiting disk is flush with the end face of the core shaft.

[0006] Preferably, the blocking disk is installed coaxially and concentrically with the core shaft, and positioning steps with different diameters are provided on the outer arc surface of the blocking disk.

[0007] Preferably, the fixing assembly includes a pull rod and a fastener; the pull rod passes through the axis of the core shaft of the first clamping part and the second clamping part, and the fastener is fixed to the two ends of the pull rod to press the core shaft of the first clamping part and the second clamping part to the middle of the pull rod.

[0008] Preferably, a circular hole matching the outer diameter of the core shaft is provided on the blocking disk.

[0009] Preferably, a through hole for the pull rod to pass through is opened along the axial direction of the core shaft.

[0010] Preferably, the blocking plate and the limiting plate are fastened by bolts.

[0011] It is also necessary to provide a method for detecting the static balance of a crushing cutter tooth seat.

[0012] A method for detecting static balance of a crushing cutter tooth seat, using the above-mentioned static balance detection device for a crushing cutter tooth seat for detection, comprises the following steps: Step S1: Install the plugging disk on the core shaft to form a first clamping part and a second clamping part; make the assembly clearance between the two meet the requirements and ensure the concentricity of the core shaft and the plugging disk; Step S2: installing the first clamping part and the second clamping part to the two sides of the inner hole of the crushing cutter tooth seat to be tested respectively, so that the blocking plate is adapted to the inner hole of the crushing cutter tooth seat to be tested, and ensuring the assembly concentricity; Step S3: adjusting the height and span of the balancing platform, and checking whether the horizontality of the rollers of the balancing platform meets the requirements; Step S4: hoisting the assembled crushing cutter tooth seat to be tested and the first clamping part and the second clamping part as a whole onto the balance stand to ensure that the crushing cutter tooth seat can rotate freely; Step S5: Perform static balance test on the crushing cutter tooth seat.

[0013] Preferably, in step S1, when the plugging disk is assembled with the core shaft, the plugging disk and the core shaft have an assembly clearance of 0.03mm-0.06mm.

[0014] Preferably, in step S2, the assembly gap between the blocking disk and the crushing cutter seat to be tested is 0.05mm-0.08mm.

[0015] Compared with the prior art, the static balance detection device and method of the crushing cutter tooth seat provided by the present invention include a clamping and fixing mechanism and a balancing stand; the clamping and fixing mechanism includes a first clamping part, a second clamping part, and a fixing assembly; the first clamping part and the second clamping part are arranged opposite to each other, and the fixing assembly passes through the axis of the first clamping part and the second clamping part, and fixes the first clamping part and the second clamping part, thereby fixing the crushing cutter tooth seat to be detected; the first clamping part and the second clamping part are rotatably installed on the balancing stand. Through the high-matching connection design between the mandrel and the plugging disk, the crushing cutter tooth seat to be tested is fixed by the plugging disk, so that the concentricity of the crushing cutter tooth seat to be tested, the mandrel and the plugging disk can be guaranteed to achieve the accuracy of static balance detection; and positioning steps of different diameters are arranged on the plugging disk, which can be applicable to cutter tooth seats with different apertures, thereby improving the versatility of tooling; during detection, the conversion and installation of tooling between different types are simple and quick, thereby improving the interchangeability of tooling and detection efficiency, and ensuring product quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for describing the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0017] Figure 1 It is a schematic diagram of the structure of the present invention.

[0018] Figure 2 It is a schematic diagram of the structure when the clamping and fixing mechanism of the present invention fixes the crushing cutter tooth seat to be tested.

[0019] Figure 3 It is a structural schematic diagram of the blocking disk of the present invention.

[0020] Figure 4 For the present invention Figure 3 Schematic diagram of the cross-sectional structure.

[0021] Figure 5 It is a schematic structural diagram of the mandrel of the present invention.

[0022] Figure 6 For the present invention Figure 5 Schematic diagram of the cross-sectional structure.

[0023] Figure 7 It is a schematic structural diagram of the first clamping part of the present invention.

[0024] Figure 8 It is a schematic diagram of the structure of the crushing cutter tooth seat to be tested.

[0025] Fig. 9 for Figure 8 Schematic diagram of the side structure.

[0026] In the figure: the first clamping part 01, the core shaft 11, the blocking plate 12, the limiting plate 13, the concave platform 14, the positioning step 15, the round hole 16, the through hole 17, the second clamping part 02, the fixing component 03, the pull rod 31, the fastener 32, the balancing stand 04, and the crushing cutter tooth seat to be tested 05. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] In the description of the present invention, it should be understood that the terms "upper", "middle", "outer", "inner", "lower" and the like indicating directions or positional relationships are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the components or elements referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as limiting the present invention.

[0029] Please see Figures 1 to 7 In one embodiment, the present invention provides a static balance detection device for a crushing cutter tooth seat, comprising a clamping and fixing mechanism and a balancing stand 04; the clamping and fixing mechanism comprises a first clamping portion 01, a second clamping portion 02, and a fixing assembly 03; the first clamping portion 01 and the second clamping portion 02 are arranged opposite to each other, and the fixing assembly 03 passes through the axis of the first clamping portion 01 and the second clamping portion 02, and fixes the first clamping portion 01 and the second clamping portion 02, thereby fixing the crushing cutter tooth seat to be detected; the first clamping portion 01 and the second clamping portion 02 are rotatably mounted on the balancing stand 04.

[0030] In one embodiment, the first clamping part 01 and the second clamping part 02 have the same structure, and the first clamping part 01 includes a core shaft 11 and a blocking disk 12; a limiting disk 13 is provided on the outer wall of one end of the core shaft 11, and the limiting disk 13 and the outer wall of the core shaft 11 form a recess 14 on which the blocking disk 12 can be installed, and the blocking disk 12 is mounted on the outside of the core shaft 11 and installed on the limiting disk 13, and the side surface of the blocking disk 12 away from the limiting disk 13 is flush with the end face of the core shaft 11.

[0031] Specifically, the plugging disc 12 is coaxially and concentrically installed with the core shaft 11, and the plugging disc 12 and the core shaft 11 are connected and fixed by bolts, washers and nuts. Positioning steps 15 of different diameters are provided on the outer arc surface of the plugging disc 12; they can be applied to cutter tooth seats with different apertures. The positioning step 15 will be stuck in the inner hole of the crushing cutter tooth seat to be tested, thereby forming a positioning.

[0032] In one embodiment, the fixing assembly 03 includes a pull rod 31 and a fastener 32; the pull rod 31 passes through the axis of the mandrel 11 of the first clamping part 01 and the second clamping part 02, and the fastener 32 is fixed to the two ends of the pull rod 31, so that the mandrel 11 of the first clamping part 01 and the second clamping part 02 is pressed toward the middle of the pull rod 31. The fastener 32 can be a nut.

[0033] Specifically, a circular hole 16 matching the outer diameter of the mandrel 11 is provided on the plugging disk 12. Bolt holes are evenly distributed around the circular hole 16. The bolt hole center circles and bolt hole diameters of the plugging disks 12 on the first clamping portion 01 and the second clamping portion 02 are uniform, and the inner hole size is uniform.

[0034] Specifically, a through hole 17 for the pull rod 31 to pass through is opened along the axial direction of the mandrel 11. After the pull rod 31 fixes the mandrel 11, it can ensure that the mandrel 11 of the first clamping part 01 and the second clamping part 02 are coaxial and concentric, and at the same time, the pull rod 31 can be used to simultaneously clamp the first clamping part 01 and the second clamping part 02 toward the center of the crushing cutter tooth seat to be tested.

[0035] Specifically, the limiting plate 13 is provided with evenly distributed mounting holes that are the same as the bolt holes on the blocking plate 12. The blocking plate 12 and the limiting plate 13 can be fastened by bolts by screwing bolts into the bolt holes and the mounting holes.

[0036] In one embodiment, the present invention provides a method for detecting static balance of a crushing cutter tooth seat, and using the static balance detection device of the crushing cutter tooth seat for detection, the method comprises the following steps: Step S1: Install the plugging disk 12 on the core shaft 11 to form a first clamping portion 01 and a second clamping portion 02; make the assembly clearance between the two meet the requirements, and ensure the concentricity of the core shaft 11 and the plugging disk 12; Step S2: Install the first clamping part 01 and the second clamping part 02 to the two sides of the inner hole of the crushing cutter tooth seat to be tested respectively, so that the blocking plate 12 is adapted to the inner hole of the crushing cutter tooth seat to be tested, and ensure the assembly concentricity; Step S3: Adjust the height and span of the balancing platform 04, and check whether the horizontality of the rollers of the balancing platform 04 meets the requirements; Step S4: hoist the assembled crushing cutter tooth seat to be tested and the first clamping part 01 and the second clamping part 02 onto the balancing stand 04 as a whole, and ensure that the crushing cutter tooth seat can rotate freely; Step S5: Perform static balance test on the crushing cutter tooth seat.

[0037] To explain more specifically, in step S1, when the plugging disk 12 and the core shaft 11 are assembled, the plugging disk 12 and the core shaft 11 are assembled with a clearance of 0.03 mm to 0.06 mm.

[0038] To explain more specifically, in step S2, the gap between the blocking plate 12 and the crushing cutter seat to be tested is 0.05mm-0.08mm.

[0039] To explain more specifically, in step S5, the imbalance generated by the tooling is calculated according to the static balance formula of ∑mr=0. The factors affecting the static balance after the tooling is assembled are mainly the uneven mass of the fastener 32 from the axis of the tooling. The mass of an M20×90 screw is 0.26Kg, the mass of a spring washer is 0.005Kg, and the mass of a nut is 0.05Kg. The total mass of the connecting components is 0.315Kg. 6×φ22 bolt holes are drilled on the flange of the plug and the core shaft 11. The CNC drilling error is 0.02mm, and the radius of the center circle of the bolt hole is 80mm. Therefore, after assembly, the closest radius r of the fastener 32 from the axis is 0.0789m, and the farthest radius r is 0.081m. When the radius difference between the two fasteners 32 in a straight line through the axis is the largest, the torque is the largest. Therefore, when the tooling is placed on the static balance test table, the unbalanced force in the X direction is F=mr1cosα+mr2cosβ (cosα=-cosβ). Since the bolt holes are arranged in an array at 30° with the X axis, α=30° is taken as the maximum torque angle. Substituting into the formula to calculate the maximum torque F=0.315Kg×(0.081-0.0789)m×cos30°=0.000573N·m. Therefore, the unbalanced torque generated by the tooling itself can be ignored.

[0040] What is disclosed above is only a preferred embodiment of the present invention, which certainly cannot be used to limit the scope of rights of the present invention. A person skilled in the art can understand that all or part of the processes of the above embodiments and equivalent changes made according to the claims of the present invention still fall within the scope of the invention.

Claims

1. A static balance detection device for a crushing cutter seat, characterized in that: It includes a clamping and fixing mechanism and a balancing stand; the clamping and fixing mechanism includes a first clamping part, a second clamping part, and a fixing assembly; the first clamping part and the second clamping part are arranged opposite to each other, and the fixing assembly passes through the axis of the first clamping part and the second clamping part, and fixes the first clamping part and the second clamping part, thereby fixing the crushing cutter tooth seat to be tested; the first clamping part and the second clamping part are rotatably installed on the balancing stand.

2. The static balance detection device for a crushing cutter seat according to claim 1 is characterized in that: The first clamping part and the second clamping part have the same structure, and the first clamping part includes a core shaft and a blocking disk; a limiting disk is provided on the outer wall of one end of the core shaft, and the limiting disk and the outer wall of the core shaft form a recessed platform for installing the blocking disk, and the blocking disk is mounted on the outside of the core shaft and installed on the limiting disk, and the surface of the blocking disk on one side away from the limiting disk is flush with the end face of the core shaft.

3. The static balance detection device for a crushing cutter seat according to claim 2 is characterized in that: The blocking disk is coaxially and concentrically installed with the core shaft, and positioning steps with different diameters are provided on the outer arc surface of the blocking disk.

4. The static balance detection device for a crushing cutter seat according to claim 3 is characterized in that: The fixing assembly includes a pull rod and a fastener; the pull rod passes through the axis of the core shaft of the first clamping part and the second clamping part, and the fastener is fixed to the two ends of the pull rod to press the core shaft of the first clamping part and the second clamping part to the middle of the pull rod.

5. The static balance detection device for a crushing cutter seat according to claim 2 is characterized in that: The blocking disk is provided with a circular hole matched with the outer diameter of the core shaft.

6. The static balance detection device for a crushing cutter seat according to claim 4 is characterized in that: A through hole for the pull rod to pass through is opened along the axial direction of the core shaft.

7. The static balance detection device for a crushing cutter seat according to claim 2 is characterized in that: The blocking plate and the limiting plate are fastened by bolts.

8. A method for detecting static balance of a crushing cutter tooth seat, using the static balance detection device for a crushing cutter tooth seat according to any one of claims 1 to 7 for detection, characterized in that: The following steps are included: Step S1: Install the plugging disk on the core shaft to form a first clamping part and a second clamping part; make the assembly clearance between the two meet the requirements and ensure the concentricity of the core shaft and the plugging disk; Step S2: installing the first clamping part and the second clamping part to the two sides of the inner hole of the crushing cutter tooth seat to be tested respectively, so that the blocking plate is adapted to the inner hole of the crushing cutter tooth seat to be tested, and ensuring the assembly concentricity; Step S3: adjusting the height and span of the balancing platform, and checking whether the horizontality of the rollers of the balancing platform meets the requirements; Step S4: hoisting the assembled crushing cutter tooth seat to be tested and the first clamping part and the second clamping part as a whole onto the balance stand to ensure that the crushing cutter tooth seat can rotate freely; Step S5: Perform static balance test on the crushing cutter tooth seat.

9. The method for detecting static balance of a crushing cutter tooth seat according to claim 8, characterized in that: In step S1, when the plugging disk is assembled with the core shaft, the plugging disk and the core shaft are assembled with a clearance of 0.03mm-0.06mm.

10. The method for detecting static balance of a crushing cutter tooth seat according to claim 8, characterized in that: In step S2, the gap between the blocking disk and the crushing cutter seat to be tested is 0.05mm-0.08mm.

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