Stirring blade and stirrer

Abstract

The invention belongs to the technical field of stirring, and discloses a stirring blade and a stirrer. The stirring blade comprises a blade base material, a bearing pack and a wear-resistant sleeve. The blade base material comprises a cylindrical supporting shaft. The wear-resistant sleeve is of a hollow cylindrical structure with one end opened in the axial direction and the other end closed. The abrasion-resistant sleeve is arranged on the supporting shaft in a sleeving mode through the bearing set, and therefore the abrasion-resistant sleeve can freely rotate outside the supporting shaft. The wear-resistant sleeve completely accommodates the supporting shaft, and the supporting shaft is prevented from being worn. The wear-resistant sleeve is cylindrical and uniform in texture, so that the peripheral wall of the wear-resistant sleeve is randomly distributed in the circumferential direction during rotation, the wear uniformity of the periphery of the wear-resistant sleeve is improved, and the service life of the stirring blade is prolonged. Under the condition that the thickness of the wear-resistant sleeve is the same as that of a wear-resistant layer in the prior art, the wear uniformity of the stirring blade can be remarkably improved, so that the service life of the stirring blade is remarkably prolonged. And the wear-resistant sleeve capable of freely rotating further realizes dispersion of the materials during rotation, so that the mixing effect of the slurry is further improved.

Description

Technical Field

[0001] The present invention relates to the technical field of stirring, and in particular to a stirring blade and a stirring machine. Background Art

[0002] There are several rows of blades on the paddle shaft of the vertical high-power mixer. The paddle shaft rotates and the blades hit the mixture, causing the mixture to eject and convect in a turbulent state to achieve a uniform mixing effect. The faster the mixture flows after ejection, the better the mixing effect.

[0003] The main function of the blade is to hit the mixture to make it throw in disorder. There are two main structures of blades at present, both of which are strip-shaped. One is to build up a wear-resistant layer on the base material by surfacing welding. The structure is simple, and the wear-resistant layer formed by surfacing welding is 1-2mm. The other is composed of three parts: blade head, blade body and blade root. The blade head is made of cemented carbide, and the blade body is attached with a wear-resistant layer on the base material.

[0004] However, no matter which type of blade, they all contact the material at the same position during operation, and the local surface of the blade is eroded quickly. After the wear-resistant layer is completely worn away, the base material begins to wear. Due to the poor wear resistance of the base material, the wear speed is faster. The wear is serious in 10 days at the fastest and 20 days at the slowest. After wear, the stirring function will be lost. Summary of the invention

[0005] The object of the present invention is to provide a stirring blade and a stirring machine, so as to improve the wear resistance of the stirring blade and prolong the service life of the stirring blade.

[0006] To achieve this object, the present invention adopts the following technical solutions:

[0007] Mixing blade, including:

[0008] A blade substrate, the blade substrate comprising a cylindrical support shaft;

[0009] A bearing group and a cylindrical wear-resistant sleeve with uniform texture, wherein one end of the wear-resistant sleeve is open in the axial direction and the other end is closed, the wear-resistant sleeve is sleeved on the support shaft through the bearing group and completely accommodates the support shaft, and the wear-resistant sleeve is made of wear-resistant material.

[0010] Optionally, the stirring blade further comprises a retaining ring, a first bearing and a second bearing, the retaining ring is detachably arranged on the wear-resistant sleeve, the inner wall of the wear-resistant sleeve is provided with a step structure, and the retaining ring is located on a side of the step structure close to the opening of the wear-resistant sleeve;

[0011] The blade substrate also includes a flange portion, which is arranged at one end of the support shaft and is limited between the retaining ring and the step structure. The flange portion cooperates with the retaining ring through the first bearing, and the flange portion cooperates with the step structure through the second bearing.

[0012] Optionally, the flange portion is provided with a first positioning step that cooperates with the first bearing.

[0013] Optionally, the step structure is provided with a second positioning step that cooperates with the second bearing.

[0014] Optionally, the retaining ring is threadedly connected to the inner wall of the wear-resistant sleeve.

[0015] Optionally, the stirring blade is arranged on the stirring shaft, and the blade substrate further includes a connecting portion, which is connected to the flange portion and extends out of the wear-resistant sleeve from an open end of the wear-resistant sleeve, and the connecting portion is embedded in the stirring shaft.

[0016] Optionally, the bearing group includes a third bearing and a fourth bearing, and the third bearing and the fourth bearing are respectively arranged at two ends of the support shaft and both cooperate with the wear-resistant sleeve.

[0017] Optionally, a third positioning step is provided on the outer periphery of the support shaft, and the third bearing abuts against the third positioning step along the axial direction;

[0018] A fourth positioning step is disposed on the outer circumference of the support shaft, and the fourth bearing abuts against the fourth positioning step along the axial direction.

[0019] Optionally, the stirring blade further comprises a first elastic pad, wherein the first elastic pad is sandwiched between the third positioning step and the third bearing;

[0020] The stirring blade further includes a second elastic pad, and the second elastic pad is sandwiched between the fourth positioning step and the fourth bearing.

[0021] A mixer comprises the above-mentioned mixing blade.

[0022] Beneficial effects of the present invention:

[0023] The stirring blade and the stirring machine provided by the present invention, the stirring blade is arranged on the stirring shaft, and the stirring shaft rotates to drive the stirring blade to mix the slurry. Specifically, the blade substrate is arranged on the stirring shaft. When the stirring shaft rotates, the wear-resistant sleeve rotates freely under the support of the bearing group, and rotates each time it hits (contacts) the material, so that each contact is at a different point. After hitting (contacting) the material many times, the outer surface of the wear-resistant sleeve is evenly worn. In the case where the wear-resistant sleeve has the same thickness as the wear-resistant layer in the prior art, the wear uniformity of the stirring blade can be significantly improved, thereby significantly improving its service life. Moreover, the freely rotatable wear-resistant sleeve further realizes the dispersion of the material during rotation, which is conducive to further improving the mixing effect of the slurry. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is a schematic diagram of the overall structure of a stirring blade provided in an embodiment of the present invention;

[0025] Figure 2 yes Figure 1 The enlarged schematic diagram of point A in the middle;

[0026] Figure 3 is a top view of a stirring blade provided in an embodiment of the present invention;

[0027] Figure 4 It is a left side view of the stirring blade provided in an embodiment of the present invention.

[0028] In the figure:

[0029] 1. blade substrate; 12. support shaft; 121. third positioning step; 13. flange portion; 131. first positioning step; 14. connection portion; 141. connection hole;

[0030] 2. Wear-resistant sleeve; 21. Step structure; 211. Second positioning step;

[0031] 31. The third bearing; 32. The fourth bearing;

[0032] 4. retaining ring; 5. first bearing; 6. second bearing; 7. first elastic pad; 8. second elastic pad. DETAILED DESCRIPTION

[0033] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0034] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0035] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0036] In the description of this embodiment, the terms "upper", "lower", "right", etc., directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplification of operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0037] like Figure 1-Figure 4 As shown, this embodiment provides a stirring blade. Specifically, the stirring blade includes a blade substrate 1, a bearing group and a wear-resistant sleeve 2.

[0038] like Figure 1 As shown, the blade substrate 1 includes a cylindrical support shaft 12. The wear-resistant sleeve 2 is a hollow cylindrical structure with one end open in the axial direction and the other end closed. The wear-resistant sleeve 2 is arranged on the support shaft 12 through a bearing sleeve, so that the wear-resistant sleeve 2 can rotate freely outside the support shaft 12. The wear-resistant sleeve 2 completely accommodates the support shaft 12 to prevent the support shaft 12 from being worn. The wear-resistant sleeve 2 is cylindrical and has a uniform texture, so that the outer peripheral wall of the wear-resistant sleeve 2 is randomly distributed in the circumferential direction during rotation, thereby improving the uniformity of the outer peripheral wear of the wear-resistant sleeve 2 and improving the service life of the stirring blade.

[0039] Specifically, the wear-resistant sleeve 2 is made of a wear-resistant material. The blade substrate 1 is made of a material with high toughness, impact resistance and fracture resistance, such as alloy steel. The wear-resistant sleeve 2 enables the stirring blade to have better wear resistance and improves its service life. The blade substrate 1 ensures that the stirring blade has sufficient strength to avoid the stirring blade from breaking, thereby ensuring the high strength of the stirring blade.

[0040] The stirring blade provided in this embodiment is arranged on the stirring shaft, and the stirring shaft rotates to drive the stirring blade to mix the slurry. Specifically, the blade substrate 1 is arranged on the stirring shaft. When the stirring shaft rotates, the wear-resistant sleeve 2 rotates freely under the support of the bearing group, and rotates each time it hits (contacts) the material, so that each contact is at a different point. After hitting (contacting) the material many times, the outer surface of the wear-resistant sleeve 2 is evenly worn. In the case where the wear-resistant sleeve 2 has the same thickness as the wear-resistant layer in the prior art, the wear uniformity of the stirring blade can be significantly improved, thereby significantly improving its service life. Moreover, the freely rotatable wear-resistant sleeve 2 further realizes the dispersion of the material during rotation, which is conducive to further improving the mixing effect of the slurry.

[0041] like Figure 1 and Figure 2 As shown, optionally, the stirring blade also includes a retaining ring 4, a first bearing 5 and a second bearing 6, the retaining ring 4 is detachably arranged on the wear-resistant sleeve 2, the inner wall of the wear-resistant sleeve 2 is provided with a step structure 21, and the retaining ring 4 is located on the side of the step structure 21 close to the opening of the wear-resistant sleeve 2; the blade substrate 1 also includes a flange portion 13, the flange portion 13 is arranged at one end of the support shaft 12, and is limited between the retaining ring 4 and the step structure 21, the flange portion 13 cooperates with the retaining ring 4 through the first bearing 5, and the flange portion 13 cooperates with the step structure 21 through the second bearing 6. Through the above arrangement, the relative positioning of the wear-resistant sleeve 2 and the blade substrate 1 in the axial direction is achieved, and the detachable connection method of the retaining ring 4 solves the assembly feasibility problem. In this embodiment, the flange portion 13 is arranged at one end of the support shaft 12 close to the opening of the wear-resistant sleeve 2, and its diameter is greater than the diameter of the support shaft 12.

[0042] like Figure 1 and Figure 2 As shown, optionally, the retaining ring 4 is threadedly connected to the inner wall of the wear-resistant sleeve 2. The threaded connection mode is reliable, easy to disassemble and assemble, and convenient to replace the wear-resistant sleeve 2.

[0043] like Figure 1 and Figure 2As shown, optionally, a first positioning step 131 is provided on the flange portion 13 to cooperate with the first bearing 5. The first bearing 5 is embedded in the first positioning step 131, and the first positioning step 131 provides positioning for the first bearing 5, thereby ensuring the positioning between the blade substrate 1 and the wear-resistant sleeve 2. In this embodiment, the first bearing 5 is a needle roller thrust bearing, and the end surface of the flange portion 13 facing the retaining ring 4 is provided with a first positioning step 131.

[0044] like Figure 1 and Figure 2 As shown, optionally, a second positioning step 211 cooperating with the second bearing 6 is provided on the step structure 21. The second positioning step 211 provides positioning for the second bearing 6, thereby ensuring the positioning between the blade substrate 1 and the wear-resistant sleeve 2. In this embodiment, the second bearing 6 is a needle roller thrust bearing with a guide rib. The step structure 21 is provided with a second positioning step 211 on the end face in the axial direction.

[0045] like Figure 1 , Figure 3 and Figure 4 As shown, optionally, the stirring blade is arranged on the stirring shaft, and the blade substrate 1 also includes a connecting portion 14, which is connected to the flange portion 13 and extends out of the wear-resistant sleeve 2 from the open end of the wear-resistant sleeve 2, and the connecting portion 14 is embedded in the stirring shaft. The connecting portion 14 is embedded in the stirring shaft and protected by the stirring shaft, and the blade substrate 1 as a whole does not contact the slurry to avoid wear. In this embodiment, the connecting portion 14 is a rectangular block structure, which is provided with a connecting hole 141. A fastener is passed through the connecting hole 141 to fix the connecting portion 14 on the stirring shaft, thereby fixing the stirring blade on the stirring shaft.

[0046] like Figure 1 and Figure 2 As shown, optionally, the bearing group includes a third bearing 31 and a fourth bearing 32, which are respectively arranged at both ends of the support shaft 12 in the axial direction and are both matched with the wear-resistant sleeve 2. The third bearing 31 and the fourth bearing 32 are respectively arranged between the support shaft 12 and the wear-resistant sleeve 2, so that the force between the support shaft 12 and the wear-resistant sleeve 2 is uniform, and the randomness of the free rotation of the wear-resistant sleeve 2 is improved, thereby improving the uniformity of its wear and improving the service life. In this embodiment, the third bearing 31 and the fourth bearing 32 can both be needle bearings.

[0047] Optionally, a third positioning step 121 is provided on the outer periphery of the support shaft 12, and the third bearing 31 abuts against the third positioning step 121 in the axial direction. The third bearing 31 is positioned and installed on the support shaft 12 by the third positioning step 121. In this embodiment, the third positioning step 121 is formed by reducing the outer diameter at one end of the support shaft 12. Similarly, a fourth positioning step is provided on the outer periphery of the support shaft 12, and the fourth bearing 32 abuts against the fourth positioning step in the axial direction. The fourth bearing 32 is positioned and installed on the support shaft 12 by the fourth positioning step. In this embodiment, the fourth positioning step is formed by reducing the outer diameter at the other end of the support shaft 12.

[0048] Optionally, the stirring blade also includes a first elastic pad 7, which is sandwiched between the third positioning step 121 and the third bearing 31. The first elastic pad 7 absorbs the vibration caused by the third bearing 31, improves structural reliability, prolongs life, and reduces noise. Similarly, the stirring blade also includes a second elastic pad 8, which is sandwiched between the fourth positioning step and the fourth bearing 32. The second elastic pad 8 absorbs the vibration caused by the fourth bearing 32, improves structural reliability, prolongs life, and reduces noise. In this embodiment, the first elastic pad 7 and the second elastic pad 8 are both annular structures.

[0049] This embodiment provides a mixer, which includes the above-mentioned mixing blade. The above-mentioned mixing blade significantly improves the wear uniformity of the mixing blade of the mixer, thereby increasing the service life of the mixing blade. The freely rotatable wear-resistant sleeve 2 further achieves the dispersion of the material during rotation, which is beneficial to improving the mixing effect of the mixer, and the mixing blade also has sufficient strength.

[0050] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the protection scope of the present invention. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A stirring blade, characterized in that: include: A blade substrate (1), wherein the blade substrate (1) comprises a cylindrical support shaft (12); A bearing group and a cylindrical wear-resistant sleeve (2) with uniform texture, wherein one end of the wear-resistant sleeve (2) is open in the axial direction and the other end is closed, and the wear-resistant sleeve (2) is arranged on the support shaft (12) through the bearing group and completely accommodates the support shaft (12), and the wear-resistant sleeve (2) is made of wear-resistant material.

2. The stirring blade according to claim 1, characterized in that: The stirring blade further comprises a retaining ring (4), a first bearing (5) and a second bearing (6); the retaining ring (4) is detachably arranged on the wear-resistant sleeve (2); the inner wall of the wear-resistant sleeve (2) is provided with a step structure (21); the retaining ring (4) is located on a side of the step structure (21) close to the opening of the wear-resistant sleeve (2); The blade substrate (1) further comprises a flange portion (13), wherein the flange portion (13) is arranged at one end of the support shaft (12) and is limited between the retaining ring (4) and the step structure (21); the flange portion (13) cooperates with the retaining ring (4) via the first bearing (5), and the flange portion (13) cooperates with the step structure (21) via the second bearing (6).

3. The stirring blade according to claim 2, characterized in that: The flange portion (13) is provided with a first positioning step (131) that cooperates with the first bearing (5).

4. The stirring blade according to claim 2, characterized in that: The step structure (21) is provided with a second positioning step (211) that cooperates with the second bearing (6).

5. The stirring blade according to claim 2, characterized in that: The retaining ring (4) is threadedly connected to the inner wall of the wear-resistant sleeve (2).

6. The stirring blade according to claim 2, characterized in that: The stirring blade is arranged on the stirring shaft, and the blade substrate (1) also includes a connecting portion (14), the connecting portion (14) is connected to the flange portion (13), and extends out of the wear-resistant sleeve (2) from an open end of the wear-resistant sleeve (2), and the connecting portion (14) is embedded in the stirring shaft.

7. The stirring blade according to claim 1, characterized in that: The bearing group comprises a third bearing (31) and a fourth bearing (32). The third bearing (31) and the fourth bearing (32) are respectively arranged at two ends of the support shaft (12) and are both matched with the wear-resistant sleeve (2).

8. The stirring blade according to claim 7, characterized in that: A third positioning step (121) is provided on the outer periphery of the support shaft (12), and the third bearing (31) abuts against the third positioning step (121) along the axial direction; The outer periphery of the support shaft (12) is provided with a fourth positioning step, and the fourth bearing (32) abuts against the fourth positioning step along the axial direction.

9. The stirring blade according to claim 8, characterized in that: The stirring blade further comprises a first elastic pad (7), wherein the first elastic pad (7) is sandwiched between the third positioning step (121) and the third bearing (31); The stirring blade further comprises a second elastic pad (8), wherein the second elastic pad (8) is sandwiched between the fourth positioning step and the fourth bearing (32).

10. A mixer, characterized in that The invention comprises a stirring blade as described in any one of claims 1 to 9.

Images