Multilayer composite shaft sleeve
By using different thermal expansion rates materials and thermal conductivity and heat dissipation designs in the sleeve, the deformation problem of the sleeve is solved when heated, and the free movement and cooling recovery of the sleeve is achieved, the damage and cost are reduced, and the heat dissipation effect is enhanced. It is suitable for high efficiency. Operating mechanical device.
Patent Information
- Application Number
- CN202421300853.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-06
- Publication Date
- 2024-12-31
- Estimated Expiration
- 2034-06-06
AI Technical Summary
The axial expansion of existing shaft sleeves due to deformation during heat is uneven, which can easily lead to damage. Traditional solutions such as increasing wall thickness or using high-thermal stable materials are costly or weight, which is not conducive to the efficient operation of mechanical devices.
Using a multi-layer composite shaft sleeve made of materials with different thermal expansion rates, heat is transmitted through the thermal conductive layer, and overheating is reduced by using heat sinks and heat sinks. The thermal expansion rate of the outer jacket is greater than that of the inner sleeve, allowing it to move freely, and after cooling through the positioning member Restore the position and combine multiple air holes to enhance the heat dissipation effect.
It reduces damage to the sleeve when heated, maintains the stability and efficiency of the mechanical device, and reduces the cost. Overheating and misalignment of the sleeve is avoided through the heat dissipation effect and the design of the positioning member.
Smart Images
Figure CN222277233U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the field of shaft sleeves, and in particular to a multi-layer composite shaft sleeve. Background Art
[0002] As a key component in mechanical devices, bushings are widely used in the connection and support of various rotating shafts. However, when the existing bushings work for a long time or the ambient temperature changes, they are easily deformed due to heat, resulting in changes in the matching clearance between the bushing and the shaft, which in turn affects the overall performance and stability of the mechanical device. At present, in order to solve the problem of bushing deformation due to heat, methods such as selecting materials with high thermal stability or increasing the wall thickness of the bushing are usually adopted. However, these methods are either costly or increase the overall weight of the bushing, which is not conducive to the efficient operation of the mechanical device.
[0003] The utility model patent with publication number CN219712066U discloses a multi-layer steel-copper composite sleeve, including a steel outer sleeve and a copper inner sleeve, wherein the copper inner sleeve is installed inside the steel outer sleeve, a first groove body is provided on the inner surface of the steel outer sleeve, a heat conducting plate is installed inside the first groove body, and the heat conducting plate is in contact with the copper inner sleeve, a second groove body is provided on the outer surface of the steel outer sleeve, a heat sink is installed inside the second groove body, and a heat exchange block is provided between the heat sink and the heat conducting plate.
[0004] When the sleeve expands due to heat, it not only expands radially, but also axially. At the same time, since the sleeve is not heated evenly, the axial expansion of the sleeve when heated is also uneven. This technical solution fixes the steel outer sleeve and the copper inner sleeve with bolts to prevent axial slippage between the two, which can easily cause damage to the sleeve when it expands due to heat. Utility Model Content
[0005] In order to reduce the damage caused by the axial expansion of the sleeve after being heated, the present application provides a multi-layer composite sleeve.
[0006] The multi-layer composite sleeve provided in this application adopts the following technical solution:
[0007] A multi-layer composite shaft sleeve comprises an outer sleeve and an inner sleeve which are coaxially arranged. The outer sleeve and the inner sleeve are made of materials with different thermal expansion coefficients and the thermal expansion coefficient of the outer sleeve is greater than that of the inner sleeve. A heat conducting layer is arranged between the inner sleeve and the outer sleeve. A heat dissipation groove is provided on the outer sleeve. A heat sink is arranged in the heat dissipation groove. Positioning pieces for maintaining the relative position of the outer sleeve and the inner sleeve are arranged at both ends of the outer sleeve.
[0008] By adopting the above technical solution, the heat of the inner sleeve is transferred to the outer sleeve through the heat-conducting layer, and the heat of the outer sleeve is transferred to the atmosphere through the heat sink, thereby reducing the overheating of the sleeve. The thermal expansion coefficient of the outer sleeve is greater than that of the inner sleeve, so that the expansion degree of the outer sleeve is greater than that of the inner sleeve, which reduces the extrusion between the inner sleeve and the outer sleeve while allowing the outer sleeve and the inner sleeve to move freely, thereby reducing damage to the sleeve. After the sleeve is cooled, the positioning piece restores the outer sleeve and the inner sleeve to their original positions to maintain the function of the sleeve.
[0009] Optionally, the positioning member includes a connecting rod and a positioning rod, the connecting rod is arranged on the inner wall of the outer sleeve and arranged radially along the outer sleeve, the positioning rod is arranged at the end of the connecting rod away from the outer sleeve and arranged parallel to the outer sleeve, and a positioning groove parallel to the positioning rod is opened on the inner wall of the inner sleeve, the positioning rod is slidably connected in the positioning groove, and the end of the positioning rod away from the connecting rod is tightly arranged against the inner wall of the positioning groove.
[0010] By adopting the above technical solution, after the sleeve is cooled, the outer sleeve contracts and drives the positioning rod to move. The positioning rod and the positioning groove are squeezed so that the position of the positioning rod is limited. The positioning rod is fixedly connected to the outer sleeve. After the position of the positioning rod is limited, the position of the outer sleeve is also limited, so that the positions of the outer sleeve and the inner sleeve are relatively fixed, thereby reducing the misalignment between the outer sleeve and the inner sleeve.
[0011] Optionally, inner side walls at both ends of the outer sleeve are provided with scales, and the scales are arranged along the axial direction of the outer sleeve.
[0012] By adopting the above technical solution, the operator can intuitively judge the degree of deviation of the outer sleeve through the scale, so as to adjust the relative position of the outer sleeve and the inner sleeve in time.
[0013] Optionally, a mounting groove is provided at the end of the connecting rod away from the outer sleeve, one end of the positioning rod is inserted into the mounting groove, and a fixing plate is provided at the end of the connecting rod away from the outer sleeve, the fixing plate covers the mounting groove, and a plurality of bolts are rotatably connected to the fixing plate, and the plurality of bolts are respectively threadedly connected to the connecting rod and the positioning rod.
[0014] By adopting the above technical solution, when replacing the positioning rod, the operator removes the bolts from the fixing plate, separates the fixing plate from the connecting rod, removes the positioning rod from the mounting groove and inserts the new positioning rod into the mounting groove, and then covers the mounting groove and the connecting rod with the fixing plate and fixes them with bolts, thereby completing the replacement of the positioning rod. This connection method is more convenient to replace.
[0015] Optionally, a fixing rod is rotatably connected to the side wall of the connecting rod, and one end of the fixing rod away from the connecting rod is connected to the fixing plate.
[0016] By adopting the above technical solution, the fixing plate is rotatably connected to the connecting rod through the fixing rod, which plays a role in reducing the loss of the fixing plate.
[0017] Optionally, a portion of the heat sink is exposed from the heat sink, and a plurality of air holes are provided on the portion of the heat sink exposed from the heat sink.
[0018] By adopting the above technical solution, the multiple air holes can increase the surface area of the heat sink and enhance the heat dissipation effect of the heat sink.
[0019] Optionally, the heat sink is covered with a rubber layer, and the heat sink is tightly arranged against the inner wall of the heat sink through the rubber layer.
[0020] By adopting the above technical solution, the heat sink is connected to the heat sink through the rubber layer. When the outer jacket is deformed, the rubber layer is deformed accordingly, which plays a role in enhancing the tightness of the connection between the heat sink and the outer jacket.
[0021] Optionally, a handle groove is formed at one end of the heat sink away from the outer sleeve, and a handle is rotatably connected in the handle groove.
[0022] By adopting the above technical solution, the handle groove is used to accommodate the handle, and the heat sink can be conveniently removed or pressed through the handle.
[0023] In summary, the present application includes at least one of the following beneficial technical effects:
[0024] 1. The thermal expansion rate of the outer sleeve is greater than that of the inner sleeve, so that the outer sleeve expands more than the inner sleeve, reducing the extrusion between the inner sleeve and the outer sleeve while allowing the outer sleeve and the inner sleeve to move freely, reducing damage to the sleeve;
[0025] 2. After the sleeve cools down, the positioning piece restores the outer sleeve and the inner sleeve to their original positions to maintain the function of the sleeve;
[0026] 3. Multiple air holes increase the surface area of the heat sink and enhance the heat dissipation effect of the heat sink. BRIEF DESCRIPTION OF THE DRAWINGS
[0027] Figure 1 It is a schematic structural diagram of a multi-layer composite sleeve according to an embodiment of the present application.
[0028] Figure 2 yes Figure 1 Magnified view of the circled structure.
[0029] Figure 3 It is a schematic structural diagram of an outer sleeve of a multi-layer composite shaft sleeve according to an embodiment of the present application.
[0030] Figure 4 It is a schematic structural diagram of a connecting rod of a multi-layer composite sleeve in an embodiment of the present application.
[0031] Explanation of the reference numerals: 1. outer sleeve; 11. heat sink; 12. heat sink; 121. air hole; 122. rubber layer; 123. handle slot; 124. handle; 13. scale; 2. inner sleeve; 21. positioning slot; 3. heat conductive layer; 4. positioning piece; 41. connecting rod; 411. mounting slot; 412. fixing plate; 413. bolt; 414. fixing rod; 42. positioning rod. DETAILED DESCRIPTION
[0032] The following is combined with Figure 1-4 This application is described in further detail.
[0033] The present application embodiment discloses a multi-layer composite sleeve. Figure 1 , Figure 2 as well as Figure 3 A multi-layer composite sleeve includes an outer sleeve 1 and an inner sleeve 2 which are coaxially arranged. The outer sleeve 1 and the inner sleeve 2 are made of materials with different thermal expansion coefficients and the thermal expansion coefficient of the outer sleeve 1 is greater than that of the inner sleeve 2, so that the expansion degree of the outer sleeve 1 is greater than that of the inner sleeve 2 when the sleeve is heated, thereby reducing the extrusion between the inner sleeve 2 and the outer sleeve 1. A heat-conducting layer 3 is filled between the outer sleeve 1 and the inner sleeve 2. The heat-conducting layer 3 is used to transfer the heat of the inner sleeve 2 to the outer sleeve 1. A heat dissipation groove 11 is provided on the outer sleeve 1. A heat dissipation fin 12 is installed in the heat dissipation groove 11. The heat dissipation fin 12 is provided outside the outer sleeve The sleeve 1 has a rubber layer 122, and the heat sink 12 is tightly arranged by the rubber layer 122 and the inner wall of the heat sink 11. The heat sink 12 is partially exposed to the heat sink 11, and a plurality of air holes 121 are provided on the portion of the heat sink 12 exposed to the heat sink 11, which increases the surface area of the heat sink 12 and enhances the heat dissipation effect. A handle groove 123 is provided at the end of the heat sink 12 away from the outer sleeve 1, and a handle 124 is rotatably connected in the handle groove 123, and the heat sink 12 can be conveniently removed and installed through the handle 124.
[0034] Reference Figure 2 , Figure 3 as well as Figure 4, multiple groups of positioning members 4 are installed at both ends of the outer sleeve 1, and the positioning members 4 are used to maintain the relative position of the outer sleeve 1 and the inner sleeve 2. The positioning members 4 include a connecting rod 41 and a positioning rod 42. The connecting rod 41 is fixedly connected to the inner side wall of the outer sleeve 1 and is arranged toward the center of the circle of the outer sleeve 1. A mounting groove 411 is opened at the end of the connecting rod 41 away from the outer sleeve 1. The positioning rod 42 is clamped in the mounting groove 411. A fixing rod 414 is rotatably connected to the side wall of the connecting rod 41. A fixing plate 412 perpendicular to the fixing rod 414 is fixedly connected to the end of the fixing rod 414 away from the connecting rod 41. The fixing plate 412 is used to cover the mounting groove 411 and the connecting rod 41. Three bolts 413 are rotatably connected to the fixing plate 412, two of which are rotatably connected to the connecting rod 41, and the other bolt 413 is rotatably connected to the positioning rod 42, so as to fix the fixing rod 414. The positioning rod 42 is fixed on the connecting rod 41, and a plurality of positioning grooves 21 corresponding to the size and position of the positioning rod 42 are provided on the inner wall of the inner sleeve 2. The positioning rod 42 is slidably connected in the positioning groove 21 and is tightly arranged against the inner wall of the positioning groove 21. After the shaft sleeve is cooled, the outer sleeve 1 contracts and drives the positioning rod 42 to move. The positioning rod 42 and the positioning groove 21 are squeezed so that the position of the positioning rod 42 is limited. The positioning rod 42 is fixedly connected to the outer sleeve 1. After the position of the positioning rod 42 is limited, the position of the outer sleeve 1 is also limited, so that the positions of the outer sleeve 1 and the inner sleeve 2 are relatively fixed, reducing the misalignment between the outer sleeve 1 and the inner sleeve 2. The inner walls at both ends of the outer sleeve 1 are engraved with scales 13 arranged along the axial direction of the outer sleeve 1. The operator can intuitively judge the degree of displacement of the outer sleeve 1 through the scales 13, so as to adjust the relative position of the outer sleeve 1 and the inner sleeve 2 in time.
[0035] The implementation principle of a multi-layer composite sleeve in the embodiment of the present application is as follows: after the sleeve is heated, the heat of the inner sleeve 2 is transmitted to the outer sleeve 1 through the heat conductive layer 3, and the heat of the outer sleeve 1 is transmitted to the atmosphere through the heat sink 12, thereby reducing the occurrence of overheating of the sleeve. The multiple air holes 121 on the heat sink 12 serve to increase the surface area of the heat sink 12, thereby enhancing the heat dissipation effect of the heat sink 12. The thermal expansion coefficient of the outer sleeve 1 is greater than that of the inner sleeve 2, thereby making the expansion degree of the outer sleeve 1 greater than that of the inner sleeve 2, thereby reducing the extrusion between the inner sleeve 2 and the outer sleeve 1 while allowing the outer sleeve 1 and the inner sleeve 2 to move freely, thereby reducing damage to the sleeve. After the sleeve is cooled, the outer sleeve 1 contracts and drives the positioning rod 42 to move. The positioning rod 42 is squeezed by the positioning groove 21, thereby limiting the position of the positioning rod 42, and the positioning rod 42 is fixedly connected to the outer sleeve 1. After the position of the positioning rod 42 is limited, the position of the outer sleeve 1 is limited, thereby making the positions of the outer sleeve 1 and the inner sleeve 2 relatively fixed, thereby reducing the misalignment between the outer sleeve 1 and the inner sleeve 2.
[0036] When replacing the positioning rod 42, the operator removes the bolt 413 from the fixing plate 412, separates the fixing plate 412 from the connecting rod 41, removes the positioning rod 42 from the mounting groove 411 and inserts the new positioning rod 42 into the mounting groove 411, and then covers the mounting groove 411 and the connecting rod 41 with the fixing plate 412 and fixes them with the bolt 413, thereby completing the replacement of the positioning rod 42. This connection method is more convenient for replacement.
[0037] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.
Claims
1. A multi-layer composite sleeve, characterized in that: The invention comprises an outer sleeve (1) and an inner sleeve (2) which are coaxially arranged, wherein the outer sleeve (1) and the inner sleeve (2) are made of materials having different thermal expansion coefficients and the thermal expansion coefficient of the outer sleeve (1) is greater than that of the inner sleeve (2), a heat conducting layer (3) is provided between the inner sleeve (2) and the outer sleeve (1), a heat dissipation groove (11) is provided on the outer sleeve (1), a heat dissipation fin (12) is provided in the heat dissipation groove (11), and positioning members (4) for maintaining the relative position of the outer sleeve (1) and the inner sleeve (2) are provided at both ends of the outer sleeve (1).
2. The multi-layer composite sleeve according to claim 1, characterized in that: The positioning member (4) comprises a connecting rod (41) and a positioning rod (42). The connecting rod (41) is arranged on the inner side wall of the outer sleeve (1) and is arranged along the radial direction of the outer sleeve (1). The positioning rod (42) is arranged at one end of the connecting rod (41) away from the outer sleeve (1) and is arranged parallel to the outer sleeve (1). A positioning groove (21) parallel to the positioning rod (42) is formed on the inner side wall of the inner sleeve (2). The positioning rod (42) is slidably connected in the positioning groove (21). One end of the positioning rod (42) away from the connecting rod (41) is tightly arranged against the inner side wall of the positioning groove (21).
3. The multi-layer composite sleeve according to claim 2, characterized in that: Scales (13) are provided on the inner side walls at both ends of the outer sleeve (1), and the scales (13) are arranged along the axial direction of the outer sleeve (1).
4. The multi-layer composite sleeve according to claim 2, characterized in that: An installation groove (411) is formed at one end of the connecting rod (41) away from the outer sleeve (1), and one end of the positioning rod (42) is inserted into the installation groove (411). A fixing plate (412) is formed at one end of the connecting rod (41) away from the outer sleeve (1), and the fixing plate (412) covers the installation groove (411). A plurality of bolts (413) are rotatably connected to the fixing plate (412), and the plurality of bolts (413) are respectively threadedly connected to the connecting rod (41) and the positioning rod (42).
5. The multi-layer composite sleeve according to claim 4, characterized in that: A fixing rod (414) is rotatably connected to the side wall of the connecting rod (41), and one end of the fixing rod (414) away from the connecting rod (41) is vertically connected to the fixing plate (412).
6. The multi-layer composite sleeve according to claim 1, characterized in that: The heat sink (12) is partially exposed from the heat sink (11), and the portion of the heat sink (12) exposed from the heat sink (11) is provided with a plurality of air holes (121).
7. The multi-layer composite sleeve according to claim 6, characterized in that: The heat sink (12) outer jacket (1) has a rubber layer (122), and the heat sink (12) is tightly arranged against the inner wall of the heat sink (11) via the rubber layer (122).
8. The multi-layer composite sleeve according to claim 7, characterized in that: A handle groove (123) is provided at one end of the heat sink (12) away from the outer sleeve (1), and a handle (124) is rotatably connected in the handle groove (123).