Abrasive disc rotor connecting structure, connecting device and abrasive disc rotor convenient to replace

Abstract

An abrasive disc rotor connecting structure, a connecting device and an abrasive disc rotor convenient to replace, the abrasive disc rotor connecting structure (120, 220) having: a through hole (125, 225), the through hole (125, 225) being located at a substantially central position of the abrasive disc rotor connecting structure (120, 220); the first connecting parts (124 and 224) are located on the outer peripheries of the abrasive disc rotor connecting structures (120 and 220) and used for being connected with the connecting parts (170 and 270) of the abrasive disc rotors (100 and 200); the second connecting parts (123 and 223) are located on the inner peripheries of the abrasive disc rotor connecting structures (120 and 220) and used for being connected with a connecting part (161) of a rotating shaft connecting structure (160); and the first connecting parts (124 and 224) and the second connecting parts (123 and 223) are not provided with flow channels for slurry to pass through.

Description

Technical Field

[0001] This disclosure relates to the technical field of components for fiber web making machines, and in particular to a grinding disc rotor connection structure, grinding disc rotor connection device, and easily replaceable grinding disc rotor for a disc mill used in a fiber web making machine. Background Technology

[0002] The disc mill has a high rotational speed (e.g., 1500 / 1800 r / min) and a large diameter (e.g., 1700 mm). It is designed to handle high axial loads (e.g., 90 t), such as a power of 15 MW. As the discs are spare parts, the working surfaces are worn due to long-term grinding. Therefore, the discs and their supporting structures need to be regularly maintained or replaced.

[0003] Currently, the connection between the grinding disc rotor and the rotating shaft is non-removably mounted to the grinding disc rotor through heat shrink fitting and / or nailing / welding. Furthermore, as... Figures 1-2 As shown, some manufacturers' grinding discs have through holes 310 located around the rotating shaft 330 in the grinding disc rotor connection part 320 of the grinding disc rotor 300 to allow slurry to flow.

[0004] However, the above solution has the following technical problems: because the connection between the grinding disc rotor and the rotating shaft is non-removably installed on the grinding disc rotor, when the grinding disc needs to be replaced after long-term wear, the entire grinding disc rotor along with the connection needs to be removed and subsequently repaired and replaced, which means that it is very time-consuming and costly; at the same time, for grinding discs with through holes 310 for slurry flow provided on the grinding disc rotor connection 320, the presence of the through holes makes the manufacturing of the grinding disc rotor connection 320 complicated and reduces its strength. Therefore, in order to compensate for the sacrificed strength, it is necessary to increase the size of the grinding disc rotor connection 320. Utility Model Content

[0005] Compared with the prior art, this utility model improves the connection structure of the grinding disc rotor: the connection structure between the grinding disc rotor and the rotating shaft is designed as a detachable / replaceable component. This allows the grinding disc rotor and / or its connection structure to be easily removed from the shaft and sent for maintenance or replacement of the grinding disc without disassembling the entire grinding disc rotor. This greatly shortens downtime / maintenance time (a new grinding disc rotor connection structure can be installed in just a few hours) and significantly reduces costs compared with existing maintenance and replacement methods. It simplifies manufacturing and increases strength while facilitating maintenance and replacement, without having to increase the size due to sacrificing strength as in the prior art.

[0006] This utility model proposes a grinding disc rotor connection structure, comprising: a through hole located approximately at the center of the connection structure; a first connection portion located at the outer periphery of the grinding disc rotor connection structure for connection with the connection portion of the grinding disc rotor; and a second connection portion located at the inner periphery of the grinding disc rotor connection structure for connection with the connection portion of the rotating shaft connection structure; neither the first connection portion nor the second connection portion has a flow channel for slurry supply.

[0007] In one embodiment, the first connecting portion includes a first outer edge portion and a second outer edge portion, the first outer edge portion and the second outer edge portion are adjacent in the axial direction, and the outer edge radius of the first outer edge portion is smaller than the outer edge radius of the second outer edge portion.

[0008] In one embodiment, the first outer edge is provided with a plurality of protrusions in the circumferential direction for engaging with a plurality of concave portions of the grinding disc rotor in a shape-matching manner.

[0009] In one embodiment, the second outer edge is provided with a plurality of second outer edge axial through holes evenly distributed along the circumference. The second outer edge axial through holes are used to connect with the grinding disc rotor so as to fix the grinding disc rotor connection structure and the grinding disc.

[0010] In one embodiment, the second outer edge is provided with a plurality of protrusions in the circumferential direction, the plurality of protrusions being used to engage with a plurality of concave portions of the grinding disc rotor in a shape-matching manner.

[0011] In one embodiment, the plurality of protrusions are respectively provided with axial connecting through holes, which are used to connect with the grinding disc rotor in order to fix the grinding disc rotor connection structure and the grinding disc.

[0012] In one embodiment, the second outer edge axial through hole is a threaded hole.

[0013] In one embodiment, the axially connected through hole of the protrusion is a threaded hole.

[0014] In one embodiment, the second connecting portion is an axially continuous or non-continuous toothed structure arranged at least partially along the circumferential direction, the surface of which is an alternating arrangement of tooth grooves and tooth tips.

[0015] This utility model proposes a grinding disc rotor connection device, including: the grinding disc rotor connection structure as described above; and a rotating shaft connection structure for connecting with a rotating shaft; the outer periphery of the rotating shaft connection structure is at least partially arranged with an axially penetrating or non-penetrating outer edge tooth structure along the circumferential direction, and the surface of the outer edge tooth structure is an alternating arrangement of tooth grooves and tooth tips.

[0016] This utility model proposes a replaceable grinding disc rotor, comprising: a grinding disc rotor connecting device as described above, wherein the grinding disc is fixed to the grinding disc rotor connecting device by screws and / or bolts, the grinding disc is provided with a recess adapted to the grinding disc rotor connecting device, and is provided with a through hole and / or threaded hole adapted to the grinding disc rotor connecting device. Attached Figure Description

[0017] Figure 1 A partial three-dimensional schematic diagram of a grinding rotor in a prior art fiber web machine is shown.

[0018] Figure 2 A partial top view schematic diagram of a grinding disc rotor in a prior art fiber web forming machine is shown.

[0019] Figure 3 A partially exploded schematic diagram of a grinding disc rotor and its rotor connection structure according to a first embodiment of the present invention is shown.

[0020] Figure 4 A partially exploded schematic diagram of a grinding disc rotor and its rotor connection structure and rotating shaft connection structure according to a first embodiment of the present invention is shown.

[0021] Figure 5 A partially exploded schematic diagram of the grinding disc rotor and its rotor connection structure and rotating shaft connection structure according to the second embodiment of the present invention is shown.

[0022] List of reference numerals

[0023] 300 grinding disc rotor

[0024] 310 through hole

[0025] 320 grinding disc rotor connection part

[0026] 330 rotating shaft

[0027] 100 grinding disc rotor

[0028] 120 Grinding Disc Rotor Connection Structure

[0029] 121 Protrusion

[0030] 122 recess

[0031] 123 Second connecting part

[0032] 124 First connecting part

[0033] 1241 First outer edge

[0034] 1242 Second outer edge

[0035] 1243 Second outer edge axial through hole

[0036] 125 through hole

[0037] 130 bolts

[0038] 140 gasket

[0039] 160° rotating shaft connection structure

[0040] 161 Rotary shaft connection structure connection part

[0041] 162 center through hole

[0042] 163 surrounding through hole

[0043] 164 ribs

[0044] Connection part of 170 grinding disc rotor

[0045] 200 grinding disc rotor

[0046] 220 Grinding Disc Rotor Connection Structure

[0047] 221 Protrusion

[0048] 222 concavity

[0049] 223 Second connecting part

[0050] 224 First Connecting Part

[0051] 2241 First outer edge

[0052] 2242 Second outer edge

[0053] 2243 Axial connection through hole of protrusion

[0054] 225 through hole

[0055] 230 bolts

[0056] 250 nuts

[0057] 270 grinding disc rotor connection part

[0058] 280 mounting holes Detailed Implementation

[0059] Figure 3A grinding rotor connection structure 120 according to a first embodiment of the present invention is shown, having a through hole 125 located approximately at the center of the connection structure 120 for accommodating a rotating shaft. The grinding rotor connection structure 120 eliminates the need for additional through holes around the rotating shaft for slurry flow; the slurry flows through the center of the grinding rotor 100 or from any other suitable location. Therefore, the grinding rotor connection structure 120 has high structural strength and a long service life. The grinding rotor connection structure 120 has a first connecting portion 124 located at the outer periphery of the grinding rotor connection structure 120 for connection with the connecting portion 170 of the grinding rotor 100, thereby detachably connecting the grinding rotor connection structure 120 and the grinding rotor 100. The first connecting portion 124 includes a first outer edge portion 1241 and a second outer edge portion 1242, which are axially adjacent, and the outer radius of the first outer edge portion 1241 is smaller than that of the second outer edge portion 1242. The second outer edge portion 1242 has a plurality of second outer edge axial through holes 1243 evenly arranged circumferentially. These second outer edge axial through holes 1243 are used to connect with the grinding disc rotor 100 to fix the grinding disc rotor connecting structure 120 and the grinding disc. The second outer edge axial through holes 1243 are threaded holes. Optionally, a shim 140 is used to make the connection force of the bolt 130 passing through the threaded hole more even. The grinding disc rotor connecting structure 120 also has a second connecting portion 123 located on the inner periphery of the grinding disc rotor connecting structure 120, used to connect with the connecting portion 161 of the rotating shaft connecting structure 160. There are no flow channels for slurry supply on the first connecting portion 124 and the second connecting portion 123 (as mentioned above, the slurry flows through the middle of the grinding rotor 100, or it can flow through any other suitable location). Therefore, it has the advantages of simplified manufacturing and high strength, without having to increase the size due to the sacrifice of strength caused by the presence of flow channels for slurry supply. The second connecting portion 123 is an axially continuous or non-continuous toothed structure arranged at least partially in the circumferential direction, and the surface of the toothed structure is an alternating arrangement of tooth grooves and tooth tips. Rotating shaft connection structure 160 (see...) Figure 4 The rotating shaft connecting structure 160 is used for connection with a rotating shaft. At least partially along the circumferential direction, the outer periphery of the rotating shaft connecting structure 160 has an axially continuous or non-continuous outer edge tooth structure. The surface of the outer edge tooth structure consists of alternating tooth grooves and tooth tips. The rotating shaft connecting structure 160 connects to the rotating shaft, thus the rotating shaft drives the rotating shaft connecting structure 160, which in turn drives the grinding disc rotor connecting structure 120, which in turn drives the grinding disc rotor 100 to rotate.

[0060] Figure 3The second outer axial through hole 1243 is shown to not protrude beyond the circumferential contour of the grinding disc rotor connecting structure 120. This makes the fixation between the grinding disc rotor connecting structure 120 and the grinding disc rotor 100 more secure after the first connecting part 124 is connected to the connecting part 170 of the grinding disc rotor 100, resulting in more balanced overall force distribution and higher overall stability during mechanical vibration. In other words, compared to the second outer axial through hole 1243 protruding beyond the circumferential contour of the grinding disc rotor connecting structure 120, the localized force on the first connecting part 124 is more easily transmitted to the entire grinding disc rotor connecting structure 120, making the first connecting part 124 less prone to damage due to localized force. Furthermore, compared to the second outer axial through hole 1243 protruding beyond the circumferential contour of the grinding disc rotor connecting structure 120, the grinding disc rotor connecting structure 120 is easier to manufacture.

[0061] Figure 3 The diagram also shows that the first outer edge 1241 has multiple protrusions 121 in the circumferential direction, which are respectively and form-fittingly engaged with multiple recesses 122 of the grinding disc rotor 100. In other words, in addition to connecting the grinding disc rotor 100 via the second outer edge axial through hole 1243 to the grinding disc rotor 100 so that the grinding disc rotor connection structure 120 transmits rotational power from the power source to the grinding disc rotor 100, the multiple protrusions 121 in the circumferential direction of the first outer edge 1241 and the multiple recesses 122 of the grinding disc rotor 100 respectively form-fittingly engage, also enabling the grinding disc rotor connection structure 120 to transmit rotational power from the power source to the grinding disc rotor 100. Therefore, the overall force distribution of the grinding disc rotor connection structure 120 is further more balanced, and the overall stability during mechanical vibration is further improved.

[0062] Figure 5 A grinding disc rotor connection structure 220 according to a second embodiment of the present invention is shown (the similarities with the first embodiment will not be repeated; the differences from the first embodiment will be described in detail below). The second outer edge 2242 has a plurality of protrusions 221 in the circumferential direction for engaging with a plurality of recesses 222 of the grinding disc rotor 200 in a form-fitting manner. Each of the protrusions 221 has an axially connected through hole 2243 for connecting with the grinding disc rotor 200 to fix the grinding disc rotor connection structure 220 and the grinding disc. The axially connected through hole 2243 is a threaded hole. That is, unlike the first embodiment, in… Figure 5In the second embodiment shown, the axial connecting through hole 2243 of the protrusion is located on the protrusion 221. The protrusion 221 protrudes beyond the circumferential contour of the grinding disc rotor connecting structure 220 and engages with a plurality of recesses 222 on the grinding disc rotor 200 in a form-fitting manner. At the same time, the axial connecting through hole 2243 of the protrusion and the threaded hole located in the recess 222 are fixedly connected by bolts 230. Therefore, at each substantially identical stress position, each protrusion 221 and each recess 222, together with each bolt 230, transmits the rotational force from the power source to the grinding disc rotor 200.

[0063] Figure 5 It is also shown that the connecting portions 270 on the grinding rotor 200 are distributed outside the circumferential contour of the mounting holes 280 for mounting the grinding rotor connecting structure 220. That is, the connecting portions 270 do not protrude from the grinding rotor 200 into the mounting holes 280. Therefore, compared to the position where the connecting portions 270 protrude from the grinding rotor 200 into the mounting holes 280, the local stress on each connecting portion 270 is more easily transmitted to the entire grinding rotor 200, making the connecting portions 270 less prone to damage due to local stress, resulting in a more balanced stress on the grinding rotor 200, higher overall stability during mechanical vibration, and easier manufacturing of the grinding rotor 200.

[0064] Figure 4 and Figure 5 The grinding disc rotor connection device is also shown, including: the grinding disc rotor connection structures 120 and 220 described above; and the rotating shaft connection structure 160 described above.

[0065] Figure 4 and Figure 5 Also shown is a replaceable grinding disc rotor, including: the above-mentioned grinding disc rotor connecting device, the grinding disc being fixed to the grinding disc rotor connecting device by screws and / or bolts, the grinding disc being provided with recesses 122, 222 adapted to the grinding disc rotor connecting device, and being provided with through holes and / or threaded holes adapted to the grinding disc rotor connecting device.

[0066] Figure 4 , Figure 5 The rotating shaft connection structure 160 according to the present invention is shown to have a central through hole 162 and a plurality of peripheral through holes 163, with a plurality of ribs 164 provided between the plurality of peripheral through holes 163. The plurality of ribs 164 provided between the plurality of peripheral through holes 163 increases the structural strength of the rotating shaft connection structure 160, so that the rotating shaft connection structure 160 can receive stronger rotational force from the rotating shaft.

Claims

1. A grinding disc rotor connection structure, characterized in that, have: A through hole, wherein the through hole is located at the center of the grinding disc rotor connection structure; The first connecting part is located on the outer periphery of the grinding disc rotor connecting structure and is used to connect with the connecting part of the grinding disc rotor. The second connecting part is located on the inner periphery of the grinding disc rotor connecting structure and is used to connect with the connecting part of the rotating shaft connecting structure. There are no flow channels for slurry supply on the first connecting part and the second connecting part.

2. The abrasive blade rotor connection structure of claim 1, wherein The first connecting portion includes a first outer edge portion and a second outer edge portion, the first outer edge portion and the second outer edge portion are adjacent in the axial direction, and the outer edge radius of the first outer edge portion is smaller than the outer edge radius of the second outer edge portion.

3. The abrasive blade rotor connection structure of claim 2, wherein, The first outer edge has a plurality of protrusions in the circumferential direction, which are used to engage with the plurality of concave portions of the grinding disc rotor in a shape-matching manner.

4. The abrasive blade rotor connection structure of claim 3, wherein The second outer edge is provided with a plurality of second outer edge axial through holes evenly arranged in the circumferential direction. The second outer edge axial through holes are used to connect with the grinding disc rotor so as to fix the grinding disc rotor connection structure and the grinding disc.

5. The abrasive blade rotor connection structure of claim 2, wherein The second outer edge has a plurality of protrusions in the circumferential direction, which are used to engage with a plurality of concave portions of the grinding rotor in a shape-matching manner.

6. The blade rotor connection structure of claim 5, wherein The plurality of protrusions are respectively provided with axial connecting through holes, which are used to connect with the grinding disc rotor in order to fix the grinding disc rotor connection structure and the grinding disc.

7. The blade rotor connection structure of claim 4 wherein, The second outer edge axial through hole is a threaded hole.

8. The blade rotor connection structure of claim 6, wherein The axial connecting through hole of the protrusion is a threaded hole.

9. The blade rotor connection structure of claim 2 wherein, The second connecting part is an axially continuous or non-continuous toothed structure arranged at least partially along the circumferential direction, and the surface of the toothed structure is an alternating arrangement of tooth grooves and tooth tips.

10. An abrasive segment rotor coupling device characterized by, include: The grinding disc rotor connection structure as described in any one of claims 1-9; as well as A rotating shaft connection structure for connecting to a rotating shaft; The outer periphery of the rotating shaft connection structure is at least partially arranged with an axially continuous or non-continuous outer edge tooth structure along the circumferential direction, and the surface of the outer edge tooth structure is an alternating arrangement of tooth grooves and tooth tips.

11. A replaceable abrasive blade rotor characterized by, include: The grinding disc rotor connecting device as described in claim 10, wherein the grinding disc is fixed to the grinding disc rotor connecting device by screws and / or bolts, and the grinding disc is provided with a recess adapted to the grinding disc rotor connecting device, and is provided with a through hole and / or threaded hole adapted to the grinding disc rotor connecting device.

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