Universal spindle balancing device and rolling mill equipment

Abstract

The utility model discloses a universal spindle balancing device and rolling mill equipment. The universal spindle balancing device comprises a base, an upper supporting mechanism, a lower supporting mechanism, an upper balancing hydraulic cylinder, a lower balancing hydraulic cylinder, an upper balancing lever and a lower balancing lever. A first connecting part and a second connecting part are respectively arranged on two sides of the base; the upper supporting mechanism and the lower supporting mechanism are arranged above the base in parallel and between the first connecting part and the second connecting part; the upper balance hydraulic cylinder and the lower balance hydraulic cylinder are arranged on the first connecting part in a staggered mode. One end of the upper balance lever is hinged with the rod head of the upper balance hydraulic cylinder, the other end is hinged with the second connecting part, and the middle part is hinged with the upper supporting mechanism; one end of the lower balance lever is hinged to the rod head of the lower balance hydraulic cylinder, the other end is hinged to the second connecting part, and the middle of the lower balance lever is hinged to the lower supporting mechanism. According to the universal spindle balancing device, the position of the balancing hydraulic cylinder is redesigned, and the stress structure of equipment is optimized, so that the equipment is convenient to maintain and repair, and the maintainability is improved.

Description

Technical Field

[0001] This utility model relates to the field of large rolling mill technology, and in particular to a universal joint shaft balancing device and rolling mill equipment. Background Technology

[0002] In recent years, as my country's steel industry production lines have been continuously upgraded to high-quality products, rolling mills, as the main equipment of the production line, have also shown a trend towards larger sizes. As rolling mills become larger, the weight of the universal joint shaft in the rolling mill transmission also increases. The increased weight of the universal joint shaft will cause the roll system to be unbalanced, which will directly affect the quality of the produced products.

[0003] To reduce the impact of universal joints on product quality, universal joint balancing devices are essential. For example, Chinese Patent No. CN202037180 U discloses a universal joint balancing device for a hot-rolled plate roughing mill. As can be seen from the accompanying drawings, the balancing hydraulic cylinder of this universal joint balancing device is arranged directly below the bearing housing, a position that is inconvenient for the maintenance of the equipment, especially the balancing hydraulic cylinder. Utility Model Content

[0004] The purpose of this utility model is to provide a universal joint balancing device and rolling mill equipment. By redesigning the position of the balancing hydraulic cylinder and optimizing the force structure of the equipment, the equipment is made easier to maintain and repair, thus improving its maintainability.

[0005] The objective of this utility model is achieved through the following technical solution:

[0006] A universal joint balancing device, comprising:

[0007] The base has a first connecting part and a second connecting part respectively on both sides;

[0008] The upper and lower support mechanisms are arranged side by side above the base and between the first and second connecting parts;

[0009] The upper and lower balancing hydraulic cylinders are staggered and arranged on the first connecting part;

[0010] The upper balance lever has one end hinged to the rod head of the upper balance hydraulic cylinder, the other end hinged to the second connecting part, and its middle part hinged to the upper support mechanism.

[0011] The lower balance lever has one end hinged to the rod head of the lower balance hydraulic cylinder, the other end hinged to the second connecting part, and its middle part hinged to the lower support mechanism.

[0012] In some embodiments, the upper support mechanism includes:

[0013] The outer bracket, the middle part of which is hinged to the middle part of the upper balance lever;

[0014] An upper bearing housing is located on top of the outer bracket and is used to connect to the upper universal joint.

[0015] In some embodiments, the lower support mechanism includes:

[0016] An inner bracket is disposed inside the outer bracket, and its bottom is hinged to the middle of the lower balance lever.

[0017] The lower bearing housing is located at the top of the inner bracket and is used to connect to the lower universal joint.

[0018] In some embodiments, a crossbeam is provided on the outer bracket, and the crossbeam is located between the upper and lower bearing seats.

[0019] In some embodiments, both the upper and lower bearing housings are split bearing housings.

[0020] In some embodiments, both the upper and lower balancing hydraulic cylinders are detachably and fixedly connected to the first connecting portion.

[0021] In some embodiments, at least the upper balance lever and / or the lower balance lever are welded components.

[0022] In some embodiments, the base is further provided with a limiting mechanism for limiting and supporting the upper and lower support mechanisms during device maintenance.

[0023] In some embodiments, the limiting mechanism includes a limiting hydraulic cylinder disposed on the base, and a pad connected to the rod head of the limiting hydraulic cylinder;

[0024] The pad is moved to the underside of the upper and lower support mechanisms for limiting support only during device maintenance.

[0025] A rolling mill equipment includes the universal joint balancing device described above.

[0026] Compared with the prior art, the beneficial effects of this utility model include at least the following:

[0027] 1. By redesigning the position of the balancing hydraulic cylinder, the stress structure of the equipment is optimized, making the equipment easier to maintain and repair, and improving the maintainability of the equipment.

[0028] 2. By replacing some parts of the structure with cast parts, the overall weight of the device is significantly reduced, resulting in higher economic efficiency.

[0029] 3. Adding a limit mechanism to limit the upper and lower support mechanisms during maintenance facilitates maintenance work without affecting the subsequent normal operation of the device. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the universal joint balancing device of this utility model from a side view.

[0031] Figure 2 This is a schematic diagram of the universal joint balancing device of this utility model from a frontal view.

[0032] In the diagram: 1. Base; 11. First connecting part; 12. Second connecting part; 2. Upper supporting mechanism; 21. Outer bracket; 22. Upper bearing seat; 23. Crossbeam; 3. Supporting mechanism; 31. Inner bracket; 32. Lower bearing seat; 4. Upper balancing hydraulic cylinder; 5. Lower balancing hydraulic cylinder; 6. Upper balancing lever; 7. Lower balancing lever; 8. Limiting mechanism; 81. Limiting hydraulic cylinder; 82. Pad block. Detailed Implementation

[0033] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided to make the present invention more comprehensive and complete, and to fully convey the concept of the exemplary embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and therefore repeated descriptions of them will be omitted.

[0034] The terms used to describe position and direction in this utility model are illustrated with the accompanying drawings, but changes can be made as needed, and all such changes are included within the scope of protection of this utility model.

[0035] This utility model discloses a universal joint shaft balancing device. This device supports and balances the weight of the universal joint shaft of the rolling mill transmission through a hydraulic cylinder, and adopts a brand-new hydraulic cylinder layout to replace the original structural layout.

[0036] See Figure 1 and Figure 2 As shown, the universal joint balancing device includes a base 1, an upper support mechanism 2, a lower support mechanism 3, an upper balancing hydraulic cylinder 4, a lower balancing hydraulic cylinder 5, an upper balancing lever 6, and a lower balancing lever 7.

[0037] The base 1 is flat, with a first connecting part 11 and a second connecting part 12 on each side. The height of the second connecting part 12 is greater than that of the first connecting part 11 to facilitate the installation of the power unit. In this application, both the first connecting part 11 and the second connecting part 12 are vertical plates, which can be fixed to the base 1 by welding, riveting, or other methods. Compared to a one-piece casting structure, the overall weight of this structure can be significantly reduced for similar specifications.

[0038] Upper and lower support mechanisms 3 and 4 are positioned above the base 1 and between the first connecting part 11 and the second connecting part 12. They are arranged in a parallel configuration and are used to connect the upper universal joint and the lower universal joint, respectively. For example, the upper support mechanism 2 includes an outer bracket 21 and an upper bearing seat 22. The outer bracket 21 is vertically suspended above the base 1, and the upper bearing seat 22 is located on top of the outer bracket 21 and is used to connect the upper universal joint. The lower support structure is similar, including an inner bracket 21 and a lower bearing seat 32. The inner bracket 21 is located inside the outer bracket 21 but is also suspended above the base 1, and the lower bearing seat 32 is located on top of the inner bracket 21 and is used to connect the lower universal joint.

[0039] The upper and lower balancing hydraulic cylinders 4 and 5 are staggered on the first connecting part 11, keeping them away from the upper and lower supporting mechanisms 3 and 4 to provide sufficient maintenance space. In this application, the upper and lower balancing hydraulic cylinders 4 and 5 are detachably fixedly connected to the first connecting part 11. For example, each of them can be connected to the first connecting part 11 by bolts, kits, etc., so as to facilitate disassembly and assembly for maintenance operations.

[0040] One end of the upper balance lever 6 is hinged to the rod head of the upper balance hydraulic cylinder 4, and the other end is hinged to the second connecting part 12. Its middle portion is also hinged to the upper supporting mechanism 2 (specifically, the middle portion of the outer bracket 21). Correspondingly, one end of the lower balance lever 7 is hinged to the rod head of the lower balance hydraulic cylinder 5, and the other end is hinged to the second connecting part 12. Its middle portion is also hinged to the lower supporting mechanism 3 (specifically, the bottom of the inner bracket 21). In this application, the upper balance lever 6 and / or the lower balance lever 7 are welded components. Compared to a one-piece cast structure, the weight of the balance levers can be significantly reduced for similar specifications.

[0041] Or as Figure 1 and Figure 2 As shown, the universal joint balancing device of this application uses a hydraulic drive combined with a lever structure to achieve the balance control function. This device is arranged between the reducer and the rolling mill. During operation, the upper and lower balancing hydraulic cylinders 4 and 5 can control the upper and lower supporting mechanisms 3 and 4 to rise via the upper and lower balancing levers 6 and 7, respectively, thereby providing an upward force to balance the weight of the upper and lower universal joints themselves. The working pressure of the upper and lower balancing hydraulic cylinders 4 and 5 is adjustable and interlocked with the rolling mill roll system lifting system to ensure synchronization with the roll system lifting and improve the accuracy of the balance.

[0042] In addition, the device replaces some of the castings with welded parts. Without affecting the stress, the overall mass of the device is reduced by about 4-6 tons compared with similar universal joint balancing devices, making it more economical.

[0043] In some embodiments, a crossbeam 23 is provided on the outer bracket 21 to strengthen the structural strength of the outer bracket 21. In this application, the crossbeam 23 is located between the upper and lower bearing seats 22 and 32.

[0044] In some embodiments, the upper and lower bearing housings 22 and 32 are both split bearing housings, thereby simplifying the installation and disassembly process of the bearings, saving manpower and time costs, and providing convenience for equipment inspection and maintenance. In addition, split bearing housings mainly bear radial loads and are suitable for self-aligning roller bearings and self-aligning ball bearings with cylindrical and tapered bores, and can maintain stability under heavy loads and impacts.

[0045] In some embodiments, a limiting mechanism 8 is also provided on the base 1 for limiting and supporting the upper and lower support mechanisms 3 and 4 during device maintenance, thereby facilitating maintenance of the upper and lower balance hydraulic cylinders 4 and 5.

[0046] Specifically, the limiting mechanism 8 includes a limiting hydraulic cylinder 81 mounted on the base 1 and a pad 82 connected to the rod head of the limiting hydraulic cylinder 81. The pad 82 is moved to directly below the upper and lower support mechanisms 3 and 4 for limiting support only during device maintenance. Note that in this example, the bottoms of the outer bracket 21 of the upper and lower support mechanisms 3 and the inner bracket 21 of the lower support mechanism 3 are essentially flush, ensuring that the pad 82 can simultaneously limit and support both the outer bracket 21 and the inner bracket 21.

[0047] This utility model also discloses a rolling mill equipment, including the aforementioned universal joint shaft balancing device. By redesigning the position of the balancing hydraulic cylinder and optimizing the force structure of the equipment, the equipment is made easier to maintain and repair, thus improving its maintainability.

[0048] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and alterations to the above embodiments within the scope of the present invention without departing from the principles and spirit of the present invention, and all such changes should fall within the protection scope of the claims of the present invention.

Claims

1. A universal joint balancing device, characterized in that, include: The base (1) has a first connecting part (11) and a second connecting part (12) respectively on both sides. Upper and lower support mechanisms (2, 3) are arranged side by side above the base (1) and between the first and second connecting parts (12); Upper and lower balancing hydraulic cylinders (4, 5) are staggered and arranged on the first connecting part (11); The upper balance lever (6) is hinged at one end to the rod head of the upper balance hydraulic cylinder (4), and at the other end to the second connecting part (12), and its middle part is hinged to the upper support mechanism (2). The lower balance lever (7) has one end hinged to the rod head of the lower balance hydraulic cylinder (5), the other end hinged to the second connecting part (12), and its middle part hinged to the lower support mechanism (3). A limiting mechanism (8) is provided on the base (1) for limiting and supporting the upper and lower support mechanisms (2, 3) during device maintenance; Among them, at least the upper balance lever (6) and / or the lower balance lever (7) are welded parts, the limiting mechanism (8) includes a limiting hydraulic cylinder (81) disposed on the base (1) and a pad (82) connected to the rod head of the limiting hydraulic cylinder (81); and the pad (82) is moved to the lower support mechanism (2, 3) for limiting support only during device maintenance.

2. The universal joint balancing device according to claim 1, characterized in that, The upper support mechanism (2) includes: The outer bracket (21) is hinged at its middle part to the middle part of the upper balance lever (6); The upper bearing housing (22) is located on the top of the outer bracket (21) and is used to connect to the upper universal joint.

3. The universal joint balancing device according to claim 2, characterized in that, The lower support mechanism (3) includes: The inner bracket (31) is located inside the outer bracket (21), and its bottom is hinged to the middle of the lower balance lever (7); The lower bearing housing (32) is disposed on the top of the inner bracket (31) and is used to connect to the lower universal joint.

4. The universal joint balancing device according to claim 3, characterized in that, A crossbeam (23) is provided on the outer bracket (21), and the crossbeam (23) is located between the upper and lower bearing seats (32).

5. The universal joint balancing device according to claim 3, characterized in that, Both the upper and lower bearing housings (22, 32) are split bearing housings.

6. The universal joint balancing device according to claim 1, characterized in that, The upper and lower balancing hydraulic cylinders (4, 5) are detachably and fixedly connected to the first connecting part (11).

7. A rolling mill equipment, characterized in that, Includes the universal joint balancing device as described in any one of claims 1-6.

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