A high strength shaft support for a double shaft mixer housing

Abstract

The utility model discloses a high strength wear axle support for double shaft mixer shell relates to double shaft mixer technical field, the utility model discloses a shell end plate and support body are provided with wear axle mouth on the shell end plate, and the support body is installed at wear axle mouth, and the support body includes inner sleeve, outer sleeve and two adapter blocks, and the inner sleeve and outer sleeve are all T type sleeve, and the inner sleeve is through wear axle mouth and is fixed with shell end plate inner side surface welding end plate part. The utility model discloses the design through the chassis connecting beam, realized the direct connection between inner sleeve, outer sleeve and mixer chassis, and the shafting support is connected with main frame as a whole, and most load is directly guided to the solid chassis, forms shorter force transmission path and higher efficient structure bearing system, and through the additional support point provided by connecting beam, effectively reduces the radial runout of stirring shaft, improves the operation stability of whole shafting.

Description

Technical Field

[0001] This utility model belongs to the technical field of twin-shaft mixers, and in particular relates to a high-strength through-shaft support for the outer shell of a twin-shaft mixer. Background Technology

[0002] In the design of twin-shaft mixers, the shaft penetration point at the end plate of the outer shell has always been a weak point in structural strength. Traditional technology usually involves fixing a sleeve through the end plate of the outer shell, with the mixing shaft passing through the sleeve, and a support bearing placed between the sleeve and the mixing shaft. To strengthen this structure, reinforcing ribs are usually welded between the sleeve and the outer shell to form a basic reinforcement scheme. This traditional structure is widely used in the field of mixing equipment. Its design concept is to distribute some of the stress from the sleeve to the outer shell through the reinforcing ribs, thereby reducing the stress concentration phenomenon at the end plate opening.

[0003] Although stiffeners improve structural strength to some extent, this traditional approach has significant technical limitations. Among the three strengthening methods (thickening the pipe wall, increasing the number of stiffeners, and increasing the height of the stiffeners), increasing the height of the stiffeners can significantly reduce stress and has the most obvious effect. However, simply increasing the wall thickness has little effect on reducing stress. This indicates that there is room for structural optimization in the design of traditional low stiffeners. In addition, fatigue failure is the most common problem at the connection of the mixer sleeve. Due to the unbalanced alternating load generated by the mixing shaft during operation, as well as the vibration and impact caused by the change in resistance during material mixing, periodic stress cycles will be generated at the connection between the sleeve and the end plate, eventually leading to the generation and propagation of structural fatigue cracks.

[0004] In actual working conditions, the working environment of a twin-shaft forced mixer is particularly harsh. The concrete mixture being mixed inside the casing will exert continuous pressure on the shaft end seal. If the seal is damaged, the bearing system will be exposed, which will lead to the failure of the entire transmission system. This shows that the traditional reinforced structure is insufficient in maintaining the stability of the shaft end seal.

[0005] The following problems still exist: 1. Stress Concentration Problem: There is often significant stress concentration at the connection between traditional reinforcing ribs and sleeves, especially at the ends of the reinforcing ribs. This stress concentration is further aggravated by the alternating load of the stirring shaft, leading to fatigue cracks. Some stirring shaft structures will fracture under normal working conditions. Commonly, those with stiffening plates will produce annular fracture surfaces at the lower edge of the stiffening plates.

[0006] 2. Vibration transmission problem: Simple reinforcing rib structure cannot effectively suppress and absorb the vibration generated during the operation of the stirring shaft. These vibrations will be transmitted to the outer shell through the reinforcing ribs, leading to problems such as loose connecting bolts and premature failure of shaft seals. At the same time, it will also generate a lot of operating noise.

[0007] 3. Installation accuracy issues: Traditional structures lack effective fault tolerance design and deviation compensation mechanisms during installation, making it difficult to accurately guarantee the coaxiality between the sleeve and the stirring shaft. This often leads to derivative problems such as uneven bearing wear and uneven sealing. In particular, for large twin-shaft mixers, due to the cumulative effect of manufacturing tolerances and welding deformation, assembly gaps often appear between the connecting beam and the base frame after installation, affecting the overall stability of the structure. Summary of the Invention

[0008] The purpose of this invention is to provide a high-strength through-shaft support for the outer shell of a twin-shaft mixer. Through the design of the base frame connecting beam, a direct connection is achieved between the inner and outer sleeves and the mixer base frame, connecting the shaft support to the main frame as a whole. Most of the load is directly guided to the robust base frame, forming a shorter force transmission path and a more efficient structural load-bearing system. The additional support points provided by the connecting beam effectively reduce the radial runout of the mixing shaft and improve the operational stability of the entire shaft system.

[0009] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution: This utility model is a high-strength through-shaft support for the outer shell of a twin-shaft mixer, including an outer shell end plate and a support body. The outer shell end plate is provided with a through-shaft opening, and the support body is installed at the through-shaft opening. The support body includes an inner sleeve, an outer sleeve, and two adapter blocks. Both the inner sleeve and the outer sleeve are T-shaped sleeves. The inner sleeve passes through the shaft opening and its end plate is welded and fixed to the inner side of the outer shell end plate. The outer sleeve is sleeved outside the inner sleeve and its end plate is welded and fixed to the outer side of the outer shell end plate. A base frame connecting beam is fixed to the periphery of the outer sleeve, and an inverted trapezoidal base block is fixed to the bottom end of the base frame connecting beam; The two transition blocks are symmetrically arranged on both sides of the base block. The top of the transition block is provided with a ramp that slides and connects with the inclined surface of the base block. The cross-section of the transition block is a trapezoidal structure.

[0010] Furthermore, it also includes a mixer base frame, with the bottom surfaces of the two transfer blocks welded and fixed to the top of the mixer base frame, and the tops of the two transfer blocks fixed to the base block by welding.

[0011] Furthermore, the outer diameter of the inner sleeve is consistent with the inner diameter of the shaft through-hole, and the inner cavity of the inner sleeve is a support mounting cavity.

[0012] Furthermore, the outer sleeve has several reinforcing ribs or an integrally formed trapezoidal tube structure between its peripheral side and end plate portion.

[0013] Furthermore, the end of the inner sleeve away from the end plate extends beyond the end of the outer sleeve away from the end plate, and the end face of the end of the inner sleeve away from the end plate is welded to the peripheral side of the outer sleeve.

[0014] Furthermore, the base frame connecting beam is an I-beam, a round bar, or a square steel structure.

[0015] This utility model has the following beneficial effects: 1. This utility model achieves direct connection between the inner and outer sleeves and the mixer base frame through the design of the base frame connecting beam, connecting the shaft support and the main frame into a whole. Most of the load is directly guided to the sturdy base frame, forming a shorter force transmission path and a more efficient structural bearing system. The additional support points provided by the connecting beam effectively reduce the radial runout of the mixing shaft and improve the operational stability of the entire shaft system.

[0016] 2. This utility model, through the design of the base block and the adapter block, achieves adaptive compensation for dimensional deviations through inclined surface fitting, allowing for a certain installation tolerance between the connecting beam and the base frame. By adjusting the position of the adapter block, the manufacturing deviation of the connecting beam length can be compensated, ensuring a tight fit between the connecting beam and the base frame, providing ideal conditions for subsequent welding connections, and solving the problem of mismatch in the assembly interface caused by component manufacturing tolerances and welding deformation.

[0017] 3. This utility model uses an inner sleeve and an outer sleeve as a support for the stirring shaft, and adopts a T-shaped double-layer sleeve system. This design forms a unique double load-bearing structure, which effectively disperses stress distribution. Compared with the traditional single sleeve, the T-shaped double-layer sleeve system has obvious mechanical advantages. The inner sleeve mainly bears the radial load and part of the bending moment from the stirring shaft, while the outer sleeve, in addition to bearing part of the radial load, mainly forms a bending resistance system together with the connecting beam. The double-layer sleeve design greatly improves the local rigidity and stability, enabling the entire shaft-penetrating position to withstand greater operating torque.

[0018] Of course, any product implementing this utility model does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the structure of a high-strength through-shaft support for the housing of a twin-shaft mixer according to the present invention; Figure 2 This is a schematic diagram of the support body. The attached diagram lists the components represented by each number as follows: 1-Outer shell end plate, 2-Transfer block, 3-Inner sleeve, 4-Outer sleeve, 5-Base frame connecting beam, 6-Mixer base frame, 101-Through shaft opening, 201-Slope, 501-Bottom block. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0022] Please see Figure 1-2 As shown, this utility model is a high-strength through-shaft support for the outer shell of a twin-shaft mixer, including an outer shell end plate 1 and a support body. The outer shell end plate 1 is provided with a through-shaft opening 101, and the support body is installed at the through-shaft opening 101. The support body includes an inner sleeve 3, an outer sleeve 4 and two adapter blocks 2. Both the inner sleeve 3 and the outer sleeve 4 are T-shaped sleeves. The inner sleeve 3 passes through the shaft opening 101 and its end plate is welded and fixed to the inner side of the outer shell end plate 1. The outer sleeve 4 is sleeved outside the inner sleeve 3 and its end plate is welded and fixed to the outer side of the outer shell end plate 1. The outer tube has a base frame connecting beam 5 fixed to its four sides, and the bottom end of the base frame connecting beam 5 is fixed with an inverted trapezoidal base block 501. Two transition blocks 2 are symmetrically arranged on both sides of the base block 501. The top of the transition block 2 is provided with a ramp 201 that slides and connects with the inclined surface of the base block 501. The cross section of the transition block 2 is a trapezoidal structure.

[0023] Among them, such as Figure 1 As shown, it also includes a mixer base frame 6, with the bottom surfaces of the two transition blocks 2 welded and fixed to the top of the mixer base frame 6, and the tops of the two transition blocks 2 fixed to the base block 501 by welding.

[0024] The outer diameter of the inner sleeve 3 is the same as the inner diameter of the shaft through-hole 101, and the inner cavity of the inner sleeve 3 is a support mounting cavity.

[0025] Among them, such as Figure 1-2 As shown, there are several reinforcing ribs or an integrally formed trapezoidal tube structure between the outer sleeve 4 and the end plate of the outer sleeve 4.

[0026] Among them, such as Figure 1-2 As shown, the end of the inner sleeve 3 away from the end plate extends beyond the end of the outer sleeve 4 away from the end plate, and the end face of the end of the inner sleeve 3 away from the end plate is welded to the circumferential side of the outer sleeve 4.

[0027] Among them, the base frame connecting beam 5 is an I-beam, round bar, or square steel structure.

[0028] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0029] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A high-strength through-shaft support for the outer shell of a twin-shaft mixer, comprising an outer shell end plate (1) and a support body, wherein the outer shell end plate (1) is provided with a through-shaft opening (101), and the support body is installed at the through-shaft opening (101), characterized in that: The support body includes an inner sleeve (3), an outer sleeve (4) and two adapter blocks (2). The inner sleeve (3) and the outer sleeve (4) are both T-shaped sleeves. The inner sleeve (3) passes through the shaft opening (101) and its end plate is welded and fixed to the inner side of the outer shell end plate (1). The outer sleeve (4) is sleeved outside the inner sleeve (3) and its end plate is welded and fixed to the outer side of the outer shell end plate (1). The outer sleeve (4) is fixed with a base frame connecting beam (5) on its periphery, and the bottom end of the base frame connecting beam (5) is fixed with a bottom block (501) of an inverted trapezoidal structure. The two transition blocks (2) are symmetrically arranged on both sides of the base block (501). The top of the transition block (2) is provided with a ramp (201) that is slidably connected to the inclined surface of the base block (501). The cross section of the transition block (2) is a trapezoidal structure.

2. A high-strength through-shaft support for the housing of a twin-shaft mixer according to claim 1, characterized in that, It also includes a mixer base frame (6), the bottom surfaces of the two adapter blocks (2) are welded and fixed to the top of the mixer base frame (6), and the tops of the two adapter blocks (2) are fixed to the base block (501) by welding.

3. A high-strength through-shaft support for the housing of a twin-shaft mixer according to claim 1, characterized in that, The outer diameter of the inner sleeve (3) is the same as the inner diameter of the shaft opening (101), and the inner cavity of the inner sleeve (3) is a support mounting cavity.

4. A high-strength through-shaft support for the housing of a twin-shaft mixer according to claim 1, characterized in that, The outer sleeve (4) has several reinforcing ribs or an integrally formed trapezoidal tube structure between its peripheral side and the end plate portion.

5. A high-strength through-shaft support for the housing of a twin-shaft mixer according to claim 1, characterized in that, The end of the inner sleeve (3) away from the end plate extends beyond the end of the outer sleeve (4) away from the end plate, and the end face of the end of the inner sleeve (3) away from the end plate is welded to the circumferential side of the outer sleeve (4).

6. A high-strength through-shaft support for the housing of a twin-shaft mixer according to claim 1, characterized in that, The base frame connecting beam (5) is an I-beam, a round bar, or a square steel structure.

Images