A vibration reduction structure and a centrifugal extractor

Abstract

The utility model belongs to the field of liquid-liquid extraction separation, especially, relate to a damping structure and centrifugal extractor. In order to be convenient to dismount, the utility model provides a damping structure, including the first component and second component of upper and lower arrangement, the upper side of first component is equipped with upper elastic part, and the lower elastic part is equipped between first component and second component, and upper elastic part, first component, lower elastic part and second component are connected through fastener, first component is equipped with pre-fixing hole, and the size relation of the aperture of pre-fixing hole and lower elastic part satisfies: the initial size of at least one part in lower elastic part is greater than the aperture of pre-fixing hole, so that makes first component and lower elastic part interference assembly before installing fastener. The utility model also provides the centrifugal extractor containing above-mentioned damping structure. Before installing fastener, interference assembly of lower elastic part and first component is an entirety, thereby facilitating subsequent dismounting work.

Description

Technical Field

[0001] This utility model belongs to the field of liquid-liquid extraction and separation, and in particular relates to a vibration reduction structure and a centrifugal extractor. Background Technology

[0002] Centrifugal extractors are a new type of fast and efficient liquid-liquid mixing and separation equipment. Centrifugal extractors use a motor to drive a drum to rotate at high speed. Two liquids with different densities and immiscible are mixed and transferred under the shear force generated by the rotation of the drum or impeller. They are then quickly separated under the centrifugal force generated by the high-speed rotation of the drum. They are widely used in fine chemicals, pharmaceuticals, hydrometallurgy, petrochemicals, environmental protection, plant extraction, new energy and other industries.

[0003] The rotational speed of a centrifugal extractor is a key operating parameter that can alter its separation factor. To improve single-unit processing capacity and separation efficiency, modern centrifugal extractors are continuously evolving towards higher rotational speeds. However, the inherent frequencies of the materials used in the components may coincide with the overall vibration frequency of the machine, causing resonance and exceeding the design tolerances for the drum vibration. Therefore, vibration damping devices should be designed.

[0004] Therefore, there is an urgent need to develop a centrifugal extractor that has good vibration reduction and isolation effects and is easy to disassemble and assemble. Utility Model Content

[0005] The purpose of this invention is to provide a vibration reduction structure to solve the technical problems of how to improve the vibration reduction effect and how to improve the efficiency of disassembling and assembling vibration reduction devices.

[0006] The purpose of this invention is also to provide a centrifugal extractor to solve the technical problems of how to improve the vibration reduction effect of the centrifugal extractor and how to improve the efficiency of disassembling and assembling the vibration reduction device.

[0007] To achieve the above objectives, the technical solution of the vibration reduction structure provided by this utility model is as follows: A vibration damping structure includes a first component and a second component arranged vertically. An upper elastic element is provided above the first component, and a lower elastic element is provided between the first component and the second component. The upper elastic element, the first component, the lower elastic element, and the second component are connected by fasteners, which pass through the upper elastic element, the first component, and the lower elastic element. The first component has a pre-fixing hole, and the relationship between the diameter of the pre-fixing hole and the size of the lower elastic element satisfies the following condition: at least a portion of the initial size of the lower elastic element is larger than the diameter of the pre-fixing hole, so that the first component and the lower elastic element are interference-fitted before the upper elastic element, the first component, the lower elastic element, and the second component are connected by fasteners.

[0008] Furthermore, the lower elastic member includes a first part that is interference-fitted into a pre-fixed hole and a second part located below the first part. The upper end of the second part has a stop limiting surface that cooperates with the first part in the vertical direction. The second part is clamped between the first part and the second part to create a first gap between the first part and the second part, thereby preventing the first part and the second part from transmitting vibration through direct contact.

[0009] Furthermore, the lower surface of the first component is provided with a receiving groove for accommodating a portion of the second component, so as to ensure that there is a first gap between the first component and the second component; the receiving groove is located below the pre-fixing hole, and before the fastener is installed, there is a second gap between the second component located in the receiving groove and the groove sidewall of the receiving groove, so as to provide expansion space for the second component when the fastener is installed, so as to avoid the second component being over-restrained.

[0010] Furthermore, the upper end of the first part is provided with a guide slope to facilitate the insertion of the first part into the pre-fixed hole.

[0011] Furthermore, the lower surface of the first component is provided with a receiving groove for accommodating a portion of the lower elastic member, so that there is a first gap between the first component and the second component, thereby preventing the first component and the second component from transmitting vibration through direct contact; the dimensions of the lower elastic member satisfy that at least a portion of the initial dimension of the lower elastic member is larger than the dimension of the receiving groove, so that the lower elastic member is interference-fitted to the receiving groove before the upper elastic member, the first component, the lower elastic member and the second component are connected by fasteners; the receiving groove constitutes a blind hole type pre-fixed hole.

[0012] Furthermore, the lower elastic member includes a larger, thicker section and a smaller, thinner section, with the thicker section positioned above the thinner section. The thicker section is used for an interference fit with the receiving groove. Before the fastener is installed, a second gap exists between a portion of the thinner section and the sidewall of the receiving groove, thereby providing expansion space for the corresponding portion of the thinner section during fastener installation to prevent the lower elastic member from being over-restrained.

[0013] Furthermore, the lower elastic member includes a larger, thicker section and a smaller, thinner section. The thicker section has thinner sections on both its upper and lower sides. The thicker section is used to make an interference fit with the receiving groove. Before the fastener is installed, there is a second gap between the thinner section located above the thicker section and the sidewall of the receiving groove, thereby providing expansion space for the corresponding part of the thinner section when the fastener is installed, so as to avoid the lower elastic member being over-restrained.

[0014] Furthermore, the fastener is a bolt, and the second component has a threaded hole corresponding to the bolt for threaded connection between the bolt and the second component, thereby realizing the connection between the upper elastic element, the first component, the lower elastic element and the second component; or, the fastener is a double-ended screw and a nut, and the second component has a through hole for the double-ended screw to pass through, and the nut is connected to both ends of the double-ended screw to realize the connection between the upper elastic element, the first component, the lower elastic element and the second component.

[0015] Furthermore, the fastener penetrates the pre-fixed hole.

[0016] The beneficial effects of the vibration damping structure provided by this utility model are as follows: By interfering with the first component before fastener connection, the lower elastic element can be integrated with the first component, forming a single unit. This allows the lower elastic element to be removed along with the first component, preventing it from falling off and facilitating operation. Simultaneously, by setting the upper and lower elastic elements, the vibration transmission path between the first and second components can be interrupted, improving the vibration damping effect.

[0017] To achieve the above objectives, the technical solution of the centrifugal extractor provided by this utility model is as follows: A centrifugal extractor includes a drum and a shaft for driving the drum to rotate, and also includes a vibration damping structure. The vibration damping structure includes a first component and a second component arranged vertically. An upper elastic element is provided above the first component, and a lower elastic element is provided between the first component and the second component. The upper elastic element, the first component, the lower elastic element, and the second component are connected by fasteners, which pass through the upper elastic element, the first component, and the lower elastic element. The first component has a pre-fixed hole, and the relationship between the diameter of the pre-fixed hole and the size of the lower elastic element satisfies the following condition: at least a portion of the initial size of the lower elastic element is larger than the diameter of the pre-fixed hole, so that the first component and the lower elastic element are interference-fitted before the upper elastic element, the first component, the lower elastic element, and the second component are connected by fasteners.

[0018] Furthermore, the lower elastic member includes a first part that is interference-fitted into a pre-fixed hole and a second part located below the first part. The upper end of the second part has a stop limiting surface that cooperates with the first part in the vertical direction. The second part is clamped between the first part and the second part to create a first gap between the first part and the second part, thereby preventing the first part and the second part from transmitting vibration through direct contact.

[0019] Furthermore, the lower surface of the first component is provided with a receiving groove for accommodating a portion of the second component, so as to ensure that there is a first gap between the first component and the second component; the receiving groove is located below the pre-fixing hole, and before the fastener is installed, there is a second gap between the second component located in the receiving groove and the groove sidewall of the receiving groove, so as to provide expansion space for the second component when the fastener is installed, so as to avoid the second component being over-restrained.

[0020] Furthermore, the upper end of the first part is provided with a guide slope to facilitate the insertion of the first part into the pre-fixed hole.

[0021] Furthermore, the lower surface of the first component is provided with a receiving groove for accommodating a portion of the lower elastic member, so that there is a first gap between the first component and the second component, thereby preventing the first component and the second component from transmitting vibration through direct contact; the dimensions of the lower elastic member satisfy that at least a portion of the initial dimension of the lower elastic member is larger than the dimension of the receiving groove, so that the lower elastic member is interference-fitted to the receiving groove before the upper elastic member, the first component, the lower elastic member and the second component are connected by fasteners; the receiving groove constitutes a blind hole type pre-fixed hole.

[0022] Furthermore, the lower elastic member includes a larger, thicker section and a smaller, thinner section, with the thicker section positioned above the thinner section. The thicker section is used for an interference fit with the receiving groove. Before the fastener is installed, a second gap exists between a portion of the thinner section and the sidewall of the receiving groove, thereby providing expansion space for the corresponding portion of the thinner section during fastener installation to prevent the lower elastic member from being over-restrained.

[0023] Furthermore, the lower elastic member includes a larger, thicker section and a smaller, thinner section. The thicker section has thinner sections on both its upper and lower sides. The thicker section is used to make an interference fit with the receiving groove. Before the fastener is installed, there is a second gap between the thinner section located above the thicker section and the sidewall of the receiving groove, thereby providing expansion space for the corresponding part of the thinner section when the fastener is installed, so as to avoid the lower elastic member being over-restrained.

[0024] Furthermore, the fastener is a bolt, and the second component has a threaded hole corresponding to the bolt for threaded connection between the bolt and the second component, thereby realizing the connection between the upper elastic element, the first component, the lower elastic element and the second component; or, the fastener is a double-ended screw and a nut, and the second component has a through hole for the double-ended screw to pass through, and the nut is connected to both ends of the double-ended screw to realize the connection between the upper elastic element, the first component, the lower elastic element and the second component.

[0025] Furthermore, the fastener penetrates the pre-fixed hole.

[0026] The beneficial effects of the centrifugal extractor provided by this utility model are as follows: the upper and lower elastic elements can isolate the vibration transmission path between the first and second components, improving the vibration reduction effect and reducing the vibration of the centrifugal extractor. During the cleaning or maintenance of the centrifugal extractor, when it is necessary to remove the first component, after removing the fasteners, because the lower elastic element and the first component were already press-fitted before the fasteners were connected, the first component and the lower elastic element form a whole. Therefore, when removing the first component, the lower elastic element can be removed together, preventing it from falling off and making operation convenient. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the structure of a centrifugal extractor in the related technology; Figure 2 This is a schematic diagram of the fastener structure of a centrifugal extractor in the related art; Figure 3 This is a schematic diagram of the structure of another centrifugal extractor before the fastener is tightened in the related technology; Figure 4 This is a schematic diagram of the structure of Embodiment 1 of the vibration reduction structure of this utility model; Figure 5 This is a schematic diagram of Embodiment 2 of the vibration reduction structure of this utility model; Figure 6 for Figure 5 Cross-sectional view of the lower elastic element; Figure 7 This is a schematic diagram of embodiment 3 of the vibration reduction structure of this utility model; Figure 8 This is a schematic diagram of embodiment 4 of the vibration reduction structure of this utility model; Figure 9 This is a schematic diagram of embodiment 5 of the vibration reduction structure of this utility model.

[0028] Explanation of reference numerals in the attached figures: 1. First component; 21. Bolt; 22. Double-ended screw; 23. Nut; 3. Second component; 4. Motor; 5. Upper elastic element; 6. Lower elastic element; 61. First part; 62. Second part; 63. Guide slope; 64. Thicker section; 65. Thinner section; 7. First gap; 8. Second gap; 9. Pre-fixing hole; 10. Gasket. Detailed Implementation

[0029] To facilitate understanding by those skilled in the art, the following explanation is provided in conjunction with relevant technologies.

[0030] The centrifugal extractor includes a rotating drum, a motor, and a centrifugal extractor body. The rotating drum is located inside the centrifugal extractor body, and the motor is located at the top of the centrifugal extractor body. The centrifugal extractor also includes a frame, on which the centrifugal extractor body is mounted.

[0031] like Figure 1 As shown, motor 4 is mounted on first component 1, and second component 3 (such as a frame or centrifugal extractor body) is used to support first component 1. First component 1 and second component 3 are directly connected by fasteners (such as bolts 21). Vibration of motor 4 is transmitted to second component 3 through fasteners.

[0032] In related technologies, for example, the vibration of the motor 4 is transmitted to the first component 1, the centrifugal extractor body, or the frame. Another example is that the vibration of the drum is transmitted to the first component 1, the centrifugal extractor body, or the frame.

[0033] To solve the problems in related technologies, such as Figures 2-3 As shown, by setting the lower elastic member 6, the first component 1 and the second component 3 can be separated, and by setting the upper elastic member 5, the fastener can be separated from the first component 1, so as to cut off the vibration transmission path between the first component 1 and the second component 3.

[0034] exist Figure 2 In a centrifugal extractor shown, the fastener is a bolt 21, the second component 3 is provided with a threaded hole, the upper elastic element 5, the lower elastic element 6 and the first component 1 are provided with corresponding through holes, and the lower elastic element 6 is installed between the first component 1 and the second component 3.

[0035] exist Figure 3 In another centrifugal extractor shown, the fasteners are a double-ended screw 22 and a nut 23. The upper elastic element 5, lower elastic element 6, first component 1, and second component 3 have corresponding through holes. The lower end of the first component 1 also has a receiving groove for accommodating part of the lower elastic element 6, creating a first gap 7 between the first component 1 and the second component 3 to prevent direct contact between them. The inner diameter of the receiving groove is larger than the initial outer diameter of the lower elastic element 6, creating a second gap 8 between the sidewall of the receiving groove and the lower elastic element 6. This provides space for the subsequent radial deformation of the lower elastic element 6, preventing it from being overly constrained. After installation, the lower elastic element 6 expands radially until it contacts the sidewall of the receiving groove (i.e., the second gap 8 disappears).

[0036] In the two centrifugal extractors described above, when disassembling the first and second components, the lower elastic element 6 separates from the first component 1 after the first component is lifted, requiring multiple lower elastic elements 6 to be removed individually, which is cumbersome. Furthermore, when the first and second components need to be reassembled later, the large number of lower elastic elements 6 makes installation difficult, potentially leading to the following issues: First, multiple lower elastic elements 6 need to be aligned with multiple first components 1 simultaneously, requiring multiple fasteners to secure them between the multiple first components 1 and second components 3; Second, the relative position of a certain lower elastic element 6 with the first component after reassembly differs from its position before disassembly.

[0037] To solve the above problems, the core inventive concept of this utility model is to first fix the relative position of the lower elastic member 6 and the first component so that the first component and the lower elastic member 6 become a whole, thereby facilitating assembly.

[0038] The present invention will be further described in detail below with reference to the embodiments.

[0039] An embodiment of the vibration reduction structure provided by this utility model: In reference Figures 1-3 On the basis of, such as Figures 4-9 As shown, the vibration damping structure includes a first component 1 and a second component 3 arranged vertically. An upper elastic element 5 is provided above the first component 1, and a lower elastic element 6 is provided between the first component 1 and the second component 3, creating a first gap 7 between them to prevent vibration transmission through direct contact. The upper elastic element 5, the first component 1, the lower elastic element 6, and the second component 3 are connected by fasteners that pass through them. The first component 1 has a pre-fixing hole 9. The diameter of the pre-fixing hole 9 and the size of the lower elastic element 6 satisfy the following condition: at least a portion of the lower elastic element 6 has an initial size larger than the diameter of the pre-fixing hole 9, allowing for an interference fit between the first component 1 and the lower elastic element 6 before connecting them using fasteners. The pre-fixing hole 9 can be a round hole, a square hole, or any other type of hole, as long as it can mate with the lower elastic element 6 to fix it.

[0040] In one embodiment, such as Figure 4 As shown, the fastener is a bolt 21. The second component 3 is provided with a threaded hole corresponding to the bolt 21, so as to make the bolt 21 threadedly connected to the second component 3, thereby realizing the connection between the upper elastic member 5, the first component 1, the lower elastic member 6 and the second component 3.

[0041] In another embodiment, such as Figure 5 , Figure 7 and Figure 8 As shown, the fasteners are a double-ended screw 22 and a nut 23. The second component 3 has a through hole for the double-ended screw 22 to pass through. The nut 23 is connected to both ends of the double-ended screw 22 to realize the connection between the upper elastic member 5, the first component 1, the lower elastic member 6 and the second component 3.

[0042] In this invention, after the lower elastic member 6 and the first component 1 are interference-fitted, the diameter of the through hole on the lower elastic member 6 is still larger than the outer diameter of the corresponding position of the fastener, so that the fastener can pass through the through hole on the lower elastic member 6. The wall of the through hole can be a cylindrical surface or other irregular surface. During the installation of the fastener, the lower elastic member 6 deforms until it comes into contact with the fastener.

[0043] In this invention, the upper elastic element 5 and the lower elastic element 6 can isolate the vibration transmission path between the first component 1 and the second component 3, thereby improving the vibration reduction effect. Simultaneously, after disassembling the fasteners, since the lower elastic element 6 is interference-fitted with the first component 1 before the fasteners are connected, the first component 1 and the lower elastic element 6 remain a single unit. Therefore, when removing the first component 1, the lower elastic element 6 can be removed along with it, preventing it from falling off and facilitating operation. When reinstalling the first component 1 onto the second component 3, all the lower elastic elements 6 can also be installed together, making installation convenient. Furthermore, during reinstallation, simply installing the first component 1 onto the second component 3 in the same posture ensures that each lower elastic element 6 remains in its previous position, facilitating the restoration of the vibration reduction structure to its original state.

[0044] exist Figure 4 In the illustrated embodiment 1, the lower elastic member 6 includes a first part 61 that is interference-fitted into the pre-fixed hole 9 and a second part 62 located below the first part 61. The upper end of the second part 62 has a stop limiting surface that cooperates with the first component 1 in the vertical direction. The second part 62 is clamped between the first component 1 and the second component 3 so that there is a first gap 7 between the first component 1 and the second component 3, thereby preventing the first component 1 and the second component 3 from transmitting vibration through direct contact.

[0045] To facilitate the insertion of the first part 61 into the pre-fixed hole 9, in one embodiment, the upper end of the first part 61 is provided with a guide slope 63.

[0046] In one embodiment, the pre-fixing hole 9 is a through hole, through which the fastener passes, and the first part 61 can be a hollow cylinder (e.g., Figure 4 (as shown), or the first part 61 is a hollow frustum (the side forms a guiding slope 63), or the first part 61 is a combination of a hollow cylinder and a hollow frustum (as shown). Figure 5 (As shown), or the first part 61 can be a hollow cuboid or other irregular three-dimensional structure. The second part 62 can be a hollow cylinder (such as... Figure 4 and Figure 5 (as shown), hollow frustum, hollow cuboid or other irregular three-dimensional structures.

[0047] exist Figure 4 and Figure 5 In the embodiment shown, both the first part 61 and the second part 62 are hollow cylinders, and the outer diameter of the second part 62 is larger than the outer diameter of the first part 61, so as to form the stop limiting surface at the transition connection between the first part 61 and the second part 62.

[0048] Of course, in other embodiments, the first part 61 and the second part 62 can also be other three-dimensional structures, as long as the projection of the upper surface of the second part 62 in the horizontal plane does not fall entirely within the projection of the first part 61 in the horizontal plane, and the portion of the projection of the upper surface of the second part 62 in the horizontal plane that exceeds the projection of the first part 61 in the horizontal plane constitutes the stop limiting surface.

[0049] exist Figure 9 In the illustrated embodiment 5, the fastener and the pre-fixing hole 9 are staggered. The lower elastic member 6 has a through hole for the fastener to pass through, but the through hole is not located on the first part 61. The first part 61 is a protrusion on the upper surface of the second part 62. The first part 61 has both a through hole for the fastener to pass through and a groove that matches the protrusion, so that the first part 61 and the lower elastic member 6 are interference-fitted using the protrusion and the groove. The groove constitutes a blind hole type pre-fixing hole 9. Of course, the first part 61 can also have a through hole that matches the protrusion, and the through hole constitutes a through hole type pre-fixing hole 9.

[0050] exist Figure 5 In the illustrated embodiment 2, the lower surface of the first component 1 is further provided with a receiving groove for accommodating the second part 62, ensuring a first gap 7 between the first component 1 and the second component 3. The receiving groove is located below the pre-fixing hole 9. Before the fastener is installed, a second gap 8 exists between the second part 62 located in the receiving groove and the groove sidewall, thereby providing expansion space for the second part 62 during fastener installation to prevent the second part 62 from being over-restrained. After the fastener is installed, the second part 62 expands to contact the groove sidewall.

[0051] exist Figure 7 Example 3 and shown Figure 8 In the illustrated embodiment 4, a receiving groove is provided on the lower surface of the first component 1 for accommodating a portion of the lower elastic member 6, so that a first gap 7 exists between the first component 1 and the second component 3, thereby preventing the first component 1 and the second component 3 from transmitting vibration through direct contact; the dimensions of the lower elastic member 6 satisfy the following: at least a portion of the initial dimensions of the lower elastic member 6 are larger than the dimensions of the receiving groove, so that the lower elastic member 6 is interference-fitted to the receiving groove before connecting the upper elastic member 5, the first component 1, the lower elastic member 6 and the second component 3 using fasteners; the receiving groove constitutes a blind hole type pre-fixing hole 9.

[0052] exist Figure 7In the illustrated embodiment 3, the lower elastic member 6 includes a larger, thicker segment 64 and a smaller, thinner segment 65. The thicker segment 64 has thinner segments 65 on both its upper and lower sides. The thicker segment 64 is used for an interference fit with the receiving groove. Before the fastener is installed, a second gap 8 exists between the thinner segment 65 above the thicker segment 64 and the sidewall of the receiving groove. This gap provides expansion space for the corresponding portion of the thinner segment 65 during fastener installation, preventing the lower elastic member 6 from being over-restrained. Simultaneously, the radial expansion of the thinner segment below the receiving groove is unrestrained.

[0053] In other embodiments, refer to Figure 7 As shown, the height of the thicker section 64 can also be shortened. In this case, the thinner section 65 located below the thicker section 64 also has a second gap 8 between it and the side wall of the receiving groove.

[0054] exist Figure 8 In the illustrated embodiment 4, the lower elastic member 6 includes a larger, thicker segment 64 and a smaller, thinner segment 65, with the thicker segment 64 located above the thinner segment 65; before the fastener is installed, a second gap 8 exists between a portion of the thinner segment 65 and the sidewall of the receiving groove.

[0055] In different embodiments, the lower elastic member 6 can be interference-fitted with any position of the receiving groove. For example, the lower elastic member 6 can be interference-fitted with at least one of the upper, middle, and lower parts of the receiving groove to fix the lower elastic member 6 at the receiving groove of the first component 1 before installing the fastener. Figure 8 In the illustrated embodiment 4, the upper part of the lower elastic member 6 is interference-fitted with the upper part of the receiving groove (pre-fixed hole 9); Figure 7 In the embodiment 3 shown, the middle part of the lower elastic member 6 is interference-fitted with the middle and lower parts of the receiving groove (pre-fixed hole 9).

[0056] When connecting the first component 1 and the second component 3 using connection methods such as flange connection, the fasteners need to be evenly distributed along a circumference. At this time, before installing the fasteners, all the lower elastic elements 6 are interference-fitted with the first component 1.

[0057] In this invention, the upper elastic element 5 and the lower elastic element 6 can be made of existing elastic materials such as rubber and polyurethane.

[0058] In different embodiments, a gasket 10 can be provided on the upper side of the upper elastic member 5 to facilitate the fastener to press the upper elastic member 5; or, gaskets 10 can be provided on both the upper and lower sides of the upper elastic member 5 to better protect the upper elastic member 5.

[0059] An embodiment of the centrifugal extractor provided by this utility model: Reference Figures 1-9As shown, the centrifugal extractor includes a vibration damping structure, a drum, and a shaft for driving the drum to rotate. The vibration damping structure is the same as any one of the vibration damping structures in the embodiments of this utility model, and will not be described again here.

[0060] In a centrifugal extractor, vibration damping structures can be installed at various points, including between the bearing mounting base and the support base, between the upper cover and the housing, between the housing and the frame, and between adjacent sections of a multi-section housing. The bearing mounting base, the upper cover, and the housing constitute the corresponding first component 1, while the support base, the housing, and the frame constitute the corresponding second component 3. In short, the aforementioned vibration damping structures can be used at any location in the centrifugal extractor where fasteners are needed to connect two vibrating components.

[0061] In one embodiment, when the fasteners are evenly spaced along the same circumference, the axis of the circumference can coincide with the axis of the centrifugal extractor drum to ensure the symmetry of the centrifugal extractor and reduce its vibration.

[0062] Finally, it should be noted that the above are merely preferred embodiments of this utility model and are not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments without creative effort, or make equivalent substitutions for some technical features, or organically combine different embodiments to create the embodiments shown in the accompanying drawings. Of course, those skilled in the art can also create other embodiments not shown in the accompanying drawings. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A vibration damping structure, comprising a first component and a second component arranged vertically, characterized in that, An upper elastic element is provided above the first component, and a lower elastic element is provided between the first component and the second component. The upper elastic element, the first component, the lower elastic element, and the second component are connected by fasteners, which pass through the upper elastic element, the first component, and the lower elastic element. The first component is provided with a pre-fixed hole, and the relationship between the diameter of the pre-fixed hole and the size of the lower elastic element satisfies the following: the initial size of at least a portion of the lower elastic element is larger than the diameter of the pre-fixed hole, so that the first component and the lower elastic element are interference-fitted before the upper elastic element, the first component, the lower elastic element, and the second component are connected by fasteners.

2. The vibration reduction structure as described in claim 1, characterized in that, The lower elastic member includes a first part that is interference-fitted into a pre-fixed hole and a second part located below the first part. The upper end of the second part has a stop limiting surface that cooperates with the first part in the vertical direction. The second part is clamped between the first part and the second part so that there is a first gap between the first part and the second part, thereby preventing the first part and the second part from transmitting vibration through direct contact.

3. The vibration reduction structure as described in claim 2, characterized in that, The lower surface of the first component is provided with a receiving groove for accommodating a portion of the second component, so as to ensure that there is a first gap between the first component and the second component; the receiving groove is located below the pre-fixing hole, and before the fastener is installed, there is a second gap between the second component located in the receiving groove and the groove sidewall of the receiving groove, so as to provide expansion space for the second component when the fastener is installed, so as to avoid the second component being over-restrained.

4. The vibration damping structure as described in claim 2 or 3, characterized in that, The upper end of the first part is provided with a guide slope to facilitate the insertion of the first part into the pre-fixed hole.

5. The vibration reduction structure as described in claim 1, characterized in that, The lower surface of the first component is provided with a receiving groove for accommodating a portion of the lower elastic member, so that there is a first gap between the first component and the second component, thereby preventing the first component and the second component from transmitting vibration through direct contact; the dimensions of the lower elastic member satisfy that at least a portion of the initial dimension of the lower elastic member is larger than the dimension of the receiving groove, so that the lower elastic member is interference-fitted to the receiving groove before the upper elastic member, the first component, the lower elastic member and the second component are connected by fasteners; the receiving groove constitutes a blind hole type pre-fixed hole.

6. The vibration reduction structure as described in claim 5, characterized in that, The lower elastic element includes a larger, thicker section and a smaller, thinner section. The thicker section is located above the thinner section and is used for an interference fit with the receiving groove. Before the fastener is installed, a second gap exists between a portion of the thinner section and the sidewall of the receiving groove, thereby providing expansion space for the corresponding portion of the thinner section during fastener installation to prevent the lower elastic element from being over-restrained.

7. The vibration reduction structure as described in claim 5, characterized in that, The lower elastic element includes a larger, thicker section and a smaller, thinner section. The thicker section has thinner sections on both its upper and lower sides. The thicker section is used to make an interference fit with the receiving groove. Before the fastener is installed, there is a second gap between the thinner section located above the thicker section and the sidewall of the receiving groove, so as to provide expansion space for the corresponding part of the thinner section when the fastener is installed, so as to avoid the lower elastic element being over-restrained.

8. The vibration damping structure according to any one of claims 1-3 and 5-7, characterized in that, The fastener is a bolt, and the second component has a threaded hole corresponding to the bolt for threaded connection between the bolt and the second component, thereby realizing the connection between the upper elastic element, the first component, the lower elastic element and the second component; or, the fastener is a double-ended screw and a nut, and the second component has a through hole for the double-ended screw to pass through, and the nut is connected to both ends of the double-ended screw to realize the connection between the upper elastic element, the first component, the lower elastic element and the second component.

9. The vibration damping structure according to any one of claims 1-3 and 5-7, characterized in that, Fasteners pass through pre-fixed holes.

10. A centrifugal extractor, comprising a rotating drum and a shaft for driving the rotating drum to rotate, characterized in that, It also includes the vibration reduction structure described in any one of claims 1 to 9.

Images