Floating bearing structure of pulverized coal grinding wheel

Abstract

The utility model relates to a floating bearing structure of a pulverized coal grinding wheel, a main shaft is connected with a main supporting arm through a rotary supporting mechanism, and a supporting wheel is fixed on the main shaft and is sleeved with a grinding layer. The rotary supporting mechanism comprises a conical ring, a main supporting ring and a front-back pushing mechanism. The conical ring is in sliding connection with the main supporting ring through a front-back pushing mechanism, the front pushing mechanism comprises a thrust air cylinder to drive a pushing disc, and the rear pushing mechanism comprises a pushing spring to drive an auxiliary pushing ring; a floating bearing structure of a pulverized coal grinding wheel serves as an advanced mechanical design and is widely applied to the field of coal processing. According to the structure, the grinding efficiency is improved, and the stability and durability of the equipment are enhanced.

Description

Technical Field

[0001] The utility model relates to a floating bearing structure of a pulverized coal grinding wheel, belonging to the field of pulverized coal processing equipment. Background Art

[0002] The pulverized coal grinding wheel mainly realizes the grinding of pulverized coal by being pushed and supported by a robotic arm and contacting with a pulverized coal grinding disc. However, since the diameters of coal blocks are different and the stacking conditions of coal blocks also vary, the grinding wheel will float during the grinding process due to the different diameters and stacking conditions of coal blocks.

[0003] The floating of the grinding wheel is currently mainly realized by a hydraulic structure on the robotic arm. This floating form can only provide fixed-axis swinging, causing the whole grinding wheel to float or be squeezed. Since the coal block stacking exists irregularly along the rotation axis of the grinding wheel, the impact on the grinding wheel will also occur irregularly along the rotation axis. Therefore, a structure is needed to enable the grinding wheel to float and swing around the rotation axis, improving the floating freedom of the grinding wheel. Summary of the Utility Model

[0004] The technical problem to be solved by the utility model is to overcome the technical problems in the prior art and provide a floating bearing structure of a pulverized coal grinding wheel.

[0005] The technical solution adopted by the utility model to solve its technical problems is:

[0006] A floating bearing structure for a pulverized coal grinding wheel, comprising a main shaft, the main shaft is connected to a main support arm through a rotary support mechanism, the main support arm is connected to a hoisting platform of a grinding mechanism through a hydraulic structure, and a support wheel is fixed on the main shaft, and a grinding layer is sleeved on the support wheel; the characteristics are: the rotary support mechanism includes two sets of mirror-symmetrically arranged conical rings sleeved on the main shaft, the conical rings include conical surfaces facing both ends of the main shaft; it also includes a main support ring fixedly connected to the main support arm, the inner ring of the main support ring is in contact with the two sets of conical rings respectively through a front pushing mechanism and a rear elastic pre-tightening mechanism to achieve a sliding connection with the conical rings; an inner groove is respectively arranged at both axial ends of the outer support ring; the front pushing mechanism includes a first outer support ring fixed to the front end of the main support ring, a part of the inner ring of the first outer support ring extends towards the inside of the main support ring, a circle of first outer spherical blocks is arranged in a circular array on the inner ring of the first outer support ring, a main pushing ring is arranged between the first outer support ring and the conical ring, a conical surface is arranged on one axial side of the main pushing ring, the conical surface is in contact with the conical ring through a first roller, and a circle of first outer spherical grooves for embedding the first outer spherical blocks is arranged in a circular array on the other axial side of the main pushing ring; the front pushing mechanism also includes a pushing air cylinder fixed to one end of the main shaft, a pushing disc is connected to the floating end of the pushing air cylinder, a number of first inner push rods are arranged in a circular array on the outer circle of the pushing disc, a number of first inner spherical grooves are arranged in a circular array on the inner ring of the main pushing ring corresponding to the array position of the first outer spherical grooves, and the ends of the first inner push rods are embedded in the first inner spherical grooves; the rear pushing mechanism includes a second outer support ring fixed to the rear end of the main support ring, the inner ring of the second outer support extends towards the inside of the main support ring, a circle of second outer spherical blocks is arranged in a circular array on the inner ring of the second outer support ring, a secondary pushing ring is arranged between the second outer support ring and the conical ring, a conical surface is arranged on one axial side of the secondary pushing ring, the conical surface is in contact with the conical ring through a second roller, and a circle of second outer spherical grooves for embedding the second outer spherical blocks is arranged in a circular array on the other axial side of the secondary pushing ring; a number of pushing springs are embedded in the circular inner side of the second outer support ring corresponding to the second outer spherical blocks, second inner spherical blocks are arranged at the ends of the pushing springs, and a number of second inner spherical grooves are arranged in a circular array on the inner ring of the secondary pushing ring corresponding to the array position of the second outer spherical grooves, and the second inner spherical blocks are embedded in the second inner spherical grooves.

[0007] As a further improvement of the present utility model, an inner groove is respectively arranged at both axial ends of the outer support ring, and the first outer support ring and the second outer support ring are fixed to the inner grooves at both ends; the inner grooves can enable the first outer support ring and the second outer support ring to be embedded into the outer support ring, reducing the pollution effect of dust on the structure.

[0008] As a further improvement of the present utility model, a stepped surface is provided on the main shaft, and a main clamping bolt is fixedly connected to the end of the stepped surface through a flange. An inlay groove is provided between the main clamping bolt and the stepped surface, and the inner ring of the tapered ring is embedded in the inlay groove; the inlay groove structure formed by the main clamping bolt facilitates the installation and disassembly of the tapered ring.

[0009] As a further improvement of the present utility model, a main gasket for buffering is provided between the tapered rings; the main gasket can reduce the extrusion friction between the tapered rings and the possibility of generating abnormal noises.

[0010] As a further improvement of the present utility model, a secondary gasket for buffering is provided between the tapered end of the tapered ring and the end face of the inlay groove; the secondary gasket can achieve the tight pressing of the inner ring of the tapered ring.

[0011] As a further improvement of the present utility model, the main gasket and the secondary gasket are made of aluminum; the aluminum material has a lower hardness and can play a good buffering role.

[0012] As a further improvement of the present utility model, a ring-shaped contact piece made of brass is provided on the tapered surface of the tapered ring, and the first roller and the second roller are in contact with the contact piece; the contact piece can reduce the wear of the first roller and the second roller and the wear of the tapered ring.

[0013] As a further improvement of the present utility model, a flange ring is integrally provided at the end of the push cylinder, and the push disk is fixed relative to the push cylinder through the flange ring; the flange ring facilitates the disassembly and replacement of the push disk.

[0014] As a further improvement of the present utility model, the inner push rod is fixed to the push disk by threads; the threaded fixation is easy to replace.

[0015] As a further improvement of the present utility model, a lining sleeve made of nylon is provided on the inner ring of the main support ring, and the outer rings of the main push ring and the secondary push ring are in contact with the lining sleeve; the lining sleeve can reduce the influence of the main push ring and the secondary push ring on the inner wall of the main support ring during swinging.

[0016] The beneficial effects of the present utility model are:

[0017] The floating bearing structure of the pulverized coal grinding wheel, as an advanced mechanical design, has a wide range of applications in the coal processing field; this structure not only improves the grinding efficiency but also enhances the stability and durability of the equipment.

[0018] First, the core component of this floating bearing structure is the main shaft, which is connected to the main support arm through a rotating support mechanism. This connection method allows the main shaft to rotate freely during operation, thus achieving uniform grinding of pulverized coal. The design of the rotating support mechanism is particularly ingenious. It uses two sets of conical rings arranged in mirror symmetry, and the conical surfaces of the conical rings face both ends of the main shaft. Such a design can effectively disperse the force received by the main shaft and improve the stability of the equipment.

[0019] Next, the main support ring is connected to the main support arm through a hydraulic structure, which enables the grinding mechanism to adjust the height and angle according to actual needs, further improving the grinding efficiency. The inner ring of the main support ring is slidably connected to the conical ring through a front pushing mechanism and a rear elastic pre-tightening mechanism. This connection method not only ensures the stable rotation of the main shaft but also plays a certain buffering role when the main shaft is impacted, protecting the equipment from damage.

[0020] The front pushing mechanism pushes the main shaft through a pushing cylinder and a pushing disk, enabling the conical ring to closely fit the main shaft and ensuring the smoothness of rotation. The rear elastic pre-tightening mechanism pre-tightens the conical ring through a pushing spring and a second inner ball block, enabling the conical ring to have a certain elastic deformation when impacted, thus playing a buffering role.

[0021] In addition, to further improve the stability and durability of the equipment, this floating bearing structure also designs a variety of buffering and fixing measures. For example, inner grooves are provided at both axial ends of the outer support ring to fix the first outer support ring and the second outer support ring to prevent them from loosening during operation. At the same time, a stepped surface and a main clamping bolt are provided on the main shaft to fix the conical ring to prevent it from falling off. In addition, main gaskets are provided between the conical rings, and secondary gaskets are provided between the conical end faces of the conical rings and the end faces of the inlay grooves. These gaskets are all made of aluminum material and have good buffering and wear resistance.

[0022] Furthermore, to improve the contact performance between the conical ring and the roller, annular contact pieces made of brass are provided on the conical surface of the conical ring. The first roller and the second roller contact the contact pieces, which can reduce frictional losses and improve the service life of the equipment.

[0023] In summary, the floating bearing structure of this pulverized coal grinding wheel is ingeniously designed and has comprehensive functions. It not only improves the grinding efficiency but also enhances the stability and durability of the equipment. Through in-depth analysis and interpretation, we can more clearly understand the advantages and characteristics of this structure, providing useful reference and inspiration for future mechanical design. Description of the Drawings

[0024] The accompanying drawings are used to provide a further understanding of the present disclosure and form a part of the specification. Together with the following detailed description, they are used to explain the present disclosure, but do not constitute a limitation to the present disclosure. In the drawings:

[0025] Figure 1 is a schematic diagram of the main structure of the present utility model.

[0026] Explanation of reference numerals

[0027] 1 - main shaft; 2 - support wheel; 3 - grinding layer; 4 - conical ring; 5 - main gasket; 6 - main clamping bolt; 7 - secondary gasket; 8 - clamping bolt; 9 - pushing cylinder; 10 - expansion ring; 11 - flange ring; 12 - outer support ring; 13 - main support arm; 14 - main pushing ring; 15 - first outer ball groove; 16 - first outer support ring; 17 - first outer ball block; 18 - first roller; 19 - contact piece; 20 - first inner ball groove; 21 - first inner push rod; 22 - outer fixing bolt; 23 - secondary pushing ring; 24 - second outer ball groove; 25 - second outer support ring; 26 - second outer ball block; 27 - inner ball block; 28 - pushing spring; 29 - second roller. Detailed description of the specific implementation

[0028] The following is a detailed description of the specific implementation of the present disclosure in conjunction with the accompanying drawings. It should be understood that the specific implementation described herein is only used to explain and illustrate the present disclosure and does not limit the present disclosure.

[0029] In the present disclosure, unless otherwise stated, the orientation terms such as "top, bottom" generally refer to the "top, bottom" in the height direction of the corresponding component in the use state, and "inner, outer" generally refer to the "inner, outer" relative to the own contour of the corresponding component. The terms "first", "second", etc. used are to distinguish one element from another and do not have sequentiality and importance. In addition, in the following description, when referring to the drawings, unless otherwise explained, the same reference numerals in different drawings represent the same or similar elements. The above definitions are only used to explain and illustrate the present disclosure and should not be construed as a limitation to the present disclosure. These drawings are all simplified schematic diagrams, only showing the basic structure of the present utility model in a schematic manner, and therefore only showing the components related to the present utility model.

[0030] A floating bearing structure for a pulverized coal grinding wheel, comprising a main shaft 1. The main shaft 1 is linked to the main support arm 13 through a rotary support mechanism. The main support arm 13 is connected to the hoisting platform of the grinding mechanism through a hydraulic structure. A support wheel 2 is fixed on the main shaft 1, and a grinding layer 3 is sleeved on the support wheel 2. It is characterized in that: the rotary support mechanism includes two sets of mirror-symmetrically arranged conical rings 4 sleeved on the main shaft 1. The conical rings 4 include conical surfaces facing both ends of the main shaft 1. It also includes a main support ring fixedly connected to the main support arm 13. The inner ring of the main support ring is in contact with the two sets of conical rings 4 respectively through a front pushing mechanism and a rear elastic pre-tightening mechanism to achieve a sliding connection relative to the conical rings 4. Inner grooves are respectively arranged at both axial ends of the outer support ring 12. The front pushing mechanism includes a first outer support ring 16 fixed to the front end of the main support ring. The inner ring part of the first outer support ring 16 extends towards the inside of the main support ring. A circle of first outer spherical blocks 17 is annularly arranged on the inner ring of the first outer support ring 16. A main pushing ring 14 is arranged between the first outer support ring 16 and the conical ring 4. A conical surface is arranged on one axial side of the main pushing ring 14, and the conical surface is in contact with the conical ring 4 through a first roller 18. A circle of first outer spherical grooves 15 for inlaying the first outer spherical blocks 17 is annularly arranged on the other axial side of the main pushing ring 14. The front pushing mechanism also includes a pushing cylinder 9 fixed to one end of the main shaft 1. A pushing disc is connected to the floating end of the pushing cylinder 9. A number of first inner push rods 21 are annularly arranged on the outer circle of the pushing disc. A number of first inner spherical grooves 20 are annularly arranged on the inner ring of the main pushing ring 14 corresponding to the array position of the first outer spherical grooves 15. The end of the first inner push rod 21 is embedded in the first inner spherical groove 20. The rear pushing mechanism includes a second outer support ring 25 fixed to the rear end of the main support ring. The inner ring of the second outer support extends towards the inside of the main support ring. A circle of second outer spherical blocks 26 is annularly arranged on the inner ring of the second outer support ring 25. A secondary pushing ring 23 is arranged between the second outer support ring 25 and the conical ring 4. A conical surface is arranged on one axial side of the secondary pushing ring 23, and the conical surface is in contact with the conical ring 4 through a second roller 29. A circle of second outer spherical grooves 24 for inlaying the second outer spherical blocks 26 is annularly arranged on the other axial side of the secondary pushing ring 23. A number of pushing springs 28 are inlaid on the annular inner side of the second outer support ring 25 corresponding to the second outer spherical blocks 26. The end of the pushing spring 28 is provided with a second inner spherical block 27. A number of second inner spherical grooves are annularly arranged on the inner ring of the secondary pushing ring 23 corresponding to the array position of the second outer spherical grooves 24. The second inner spherical block 27 is embedded in the second inner spherical groove.

[0031] Further, inner grooves are respectively arranged at both axial ends of the outer support ring 12, and the first outer support ring 16 and the second outer support ring 25 are fixed to the inner grooves at both ends.

[0032] Further, a stepped surface is provided on the main shaft 1, and a main clamping bolt 6 is fixedly connected to the end of the stepped surface through a flange. An inlay groove is provided between the main clamping bolt 6 and the stepped surface, and the inner ring of the tapered ring 4 is embedded in the inlay groove.

[0033] Further, a main gasket 5 for buffering is provided between the tapered rings 4.

[0034] Further, a secondary gasket 7 for buffering is provided between the tapered end of the tapered ring 4 and the end face of the inlay groove.

[0035] Further, the main gasket 5 and the secondary gasket 7 are made of aluminum.

[0036] Further, an annular contact piece 19 made of brass is provided on the tapered surface of the tapered ring 4, and the first roller 18 and the second roller 29 are in contact with the contact piece 19; wherein, a flange ring 11 is integrally provided at the end of the push cylinder 9, and the push disk is fixed relative to the push cylinder 9 through the flange ring 11.

[0037] Further, the inner push rod is fixed to the push disk by threads.

[0038] Further, a nylon inner lining sleeve is provided on the inner ring of the main support ring, and the outer rings of the main push ring 14 and the secondary push ring 23 are in contact with the inner lining sleeve.

[0039] During use, when the grinding layer 3 on the surface of the support wheel 2 swings due to the influence of the coal seam, the main shaft 1 will swing relative to the outer support ring 12, and the tapered rings 4 on the main shaft 1 will also swing along with the swing of the outer support ring 12. During the swinging process, the tapered rings 4 on both sides will squeeze the local first roller 18 or the second roller 29. If there is no floating support, the impact will be directly transmitted to the first roller 18 and the second roller 29, resulting in the scrapping of the rollers. In this structure, when swinging, the first roller 18 and the second roller 29 are placed on the main push ring 14 and the secondary push ring 23, and the main push ring 14 and the secondary push ring 23 will swing with the local mating first outer ball block 17, first outer ball groove 15, second outer ball block 26, and second outer ball groove 24 as the swing fulcrums. The impact force of the swing will be buffered by the push cylinder 9 that provides a floating support force for the main push ring 14 and the push spring 28 that provides an auxiliary support force for the secondary push ring 23, thereby absorbing the impact force and reducing the possibility of the impact force being directly applied to the rollers, and improving the service life of the entire rotary support structure.

[0040] Inspired by the above ideal embodiments of the present invention, through the above description, relevant staff can make various changes and modifications completely within the scope of not deviating from the technical idea of this invention. The technical scope of this invention is not limited to the content in the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A floating bearing structure of a coal powder grinding wheel, comprising a main shaft, the main shaft is connected to a main support arm through a rotating support mechanism, the main support arm is connected to a hoisting platform of a grinding mechanism through a hydraulic structure, a support wheel is fixed on the main shaft, and a grinding layer is sleeved on the support wheel; characterized in that: The rotating support mechanism includes two groups of mirror-symmetrically arranged conical rings sleeved on the main shaft, and the conical rings include conical surfaces facing the two ends of the main shaft; it also includes a main support ring fixedly connected to the main support arm, and the inner ring of the main support ring is respectively in contact with the two groups of conical rings through the front pushing mechanism and the rear elastic pre-tightening mechanism to achieve sliding connection relative to the conical rings; an inner groove is respectively provided at the axial ends of the outer support ring; The front pushing mechanism includes a first outer support ring fixed to the front end of the main support ring, the inner ring portion of the first outer support ring extends toward the inside of the main support ring, a circle of first outer ball blocks are arranged in an annular array on the inner ring of the first outer support ring, a main push ring is arranged between the first outer support ring and the tapered ring, a conical surface is arranged on one axial side of the main push ring, the conical surface contacts the tapered ring through a first roller, and a first outer ball groove for embedding the first outer ball block is arranged in an annular array on the other axial side of the main push ring; the front pushing mechanism also includes a thrust cylinder fixed to one end of the main shaft, a thrust plate is connected to the floating end of the thrust cylinder, a plurality of first inner push rods are arranged in an outer annular array of the thrust plate, a plurality of first inner ball grooves are arranged in an inner annular array of the main push ring corresponding to the first outer ball groove array position, and the end of the first inner push rod is embedded in the first inner ball groove; The rear pushing mechanism includes a second outer support ring fixed at the rear end of the main support ring, the inner ring of the second outer support extends inside the main support ring, a circle of second outer ball blocks is arranged in an annular array on the inner ring of the second outer support ring, and an auxiliary push ring is arranged between the second outer support ring and the conical ring, a conical surface is arranged on one axial side of the auxiliary push ring, the conical surface contacts the conical ring through a second roller, and a second outer ball groove for embedding the second outer ball block is arranged in an annular array on the other axial side of the auxiliary push ring; a plurality of push springs are embedded on the annular inner side of the second outer support ring corresponding to the second outer ball block, a second inner ball block is arranged at the end of the push spring, a plurality of second inner ball grooves are arranged in an annular array on the inner ring of the auxiliary push ring corresponding to the second outer ball groove array position, and the second inner ball block is embedded in the second inner ball groove.

2. The floating bearing structure of a coal powder grinding wheel according to claim 1, characterized in that: An inner groove is respectively arranged at two axial ends of the outer support ring, and the first outer support ring and the second outer support ring are fixed to the inner grooves at the two ends.

3. The floating bearing structure of a coal powder grinding wheel according to claim 1, characterized in that: A step surface is arranged on the main shaft, a main clamping bolt is fixedly connected to the end of the step surface through a flange, an inlay groove is arranged between the main clamping bolt and the step surface, and the inner ring of the conical ring is embedded in the inlay groove.

4. The floating bearing structure of a coal powder grinding wheel according to claim 1, characterized in that: A main gasket that plays a buffering role is arranged between the tapered rings.

5. The floating bearing structure of a coal powder grinding wheel according to claim 4, characterized in that: A secondary gasket playing a buffering role is arranged between the tapered end of the tapered ring and the end surface of the inlay groove.

6. The floating bearing structure of a coal powder grinding wheel according to claim 5, characterized in that: The main gasket and the auxiliary gasket are made of aluminum.

7. The floating bearing structure of a coal powder grinding wheel according to claim 1, characterized in that: An annular contact sheet made of brass is arranged on the conical surface of the conical ring, and the first roller and the second roller are in contact with the contact sheet.

8. The floating bearing structure of a coal powder grinding wheel according to claim 1, characterized in that: A flange ring is integrally arranged at the end of the thrust cylinder, and the push plate is fixed relative to the thrust cylinder via the flange ring.

9. The floating bearing structure of a coal powder grinding wheel according to claim 1, characterized in that: The inner push rod is fixed to the push plate by threads.

10. The floating bearing structure of a coal powder grinding wheel according to claim 1, characterized in that: The inner ring of the main support ring is provided with an inner sleeve made of nylon, and the outer rings of the main thrust ring and the auxiliary thrust ring are in contact with the inner sleeve.

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