Quickly detachable structure of air guide fan small steam turbine coupling

Abstract

The utility model relates to the field of small steam turbine coupling of induced draft fan, disclose a quick dismounting's small steam turbine coupling structure of induced draft fan, including connecting piece a, connecting piece b is provided with connecting piece a rear side, the fixed mounting of fixed part is installed to connecting piece a upper portion through bolt, the buffer piece is provided between connecting piece a and connecting piece b, the upper portion of fixed part is provided with auxiliary assembly, the auxiliary assembly includes the auxiliary part of inlaying in fixed part outside, the sealing element is fixedly connected with the lower part of auxiliary part, the sealing element is inserted in the inner wall of fixed part, in the utility model, through the cooperation of auxiliary assembly and fixed part, use sealing element to carry out the plugging of fixed part's mounting hole, prevent outside air, water vapor and impurity to enter the inside of mounting hole, thereby reduce the oxidation rust of bolt in the use process of coupling, thereby make the bolt on the coupling dismantle smoothly.

Description

Technical Field

[0001] This utility model relates to the field of induced draft fan turbine couplings, and in particular to a quick-disassembly and assembly structure for induced draft fan turbine couplings. Background Technology

[0002] In industries such as power, chemical, and metallurgy, the small steam turbine of the induced draft fan is the core power equipment that drives the operation of the induced draft fan. The performance of its coupling directly affects the energy efficiency, reliability, and maintenance cost of the entire system.

[0003] Traditional couplings are cumbersome to install and disassemble, requiring numerous bolts for fixation. Taking the induced draft fan coupling in a coal chemical plant as an example, the working environment is typically harsh, with the medium often containing impurities such as coal dust and oil. However, the unsealed mounting holes of traditional couplings are easily clogged by these impurities, making bolt removal difficult. Therefore, a quick-disassembly and reassembly structure for induced draft fan / small steam turbine couplings is proposed to solve these problems. Utility Model Content

[0004] To overcome the above shortcomings, this utility model provides a quick-disassembly and assembly structure for the induced draft fan turbine coupling, aiming to improve the problems in the prior art where "the induced draft fan turbine coupling is cumbersome to disassemble and assemble, and the mounting holes are easily blocked by impurities, making bolt removal difficult".

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a quick-disassembly and detachable induced draft fan turbine coupling structure, including a connector a, a connector b provided on the rear side of the connector a, a fixing member fixedly installed on the upper part of the connector a by bolts, a buffer member provided between the connector a and the connector b, and an auxiliary component provided on the upper part of the fixing member;

[0006] The auxiliary component includes an auxiliary part that fits onto the outside of the fixing part, a sealing element that is fixedly connected to the lower part of the auxiliary part, the sealing element being inserted into the inner wall of the fixing part, and the auxiliary part being fixedly installed on the upper part of the fixing part by fastening bolts.

[0007] As a further description of the above technical solution:

[0008] A stop cylinder is fixedly connected to the upper outer side of the fastening bolt, and a convex ring is provided on the inner side of the fastening bolt near the stop cylinder. A rubber ring is fixedly connected to the upper part of the auxiliary component, and a groove is provided on the inner wall of the rubber ring.

[0009] As a further description of the above technical solution:

[0010] The convex ring is engaged with the inner wall of the groove.

[0011] As a further description of the above technical solution:

[0012] The auxiliary component is designed to be arc-shaped.

[0013] As a further description of the above technical solution:

[0014] The inner wall of the fastener has a slot, and the outer side of the seal has an annular protrusion.

[0015] As a further description of the above technical solution:

[0016] The annular protrusion on the outer side of the seal engages with the slot.

[0017] As a further description of the above technical solution:

[0018] The buffer is designed in a plum blossom shape.

[0019] This utility model has the following beneficial effects:

[0020] 1. In this utility model, by using auxiliary components and fasteners in conjunction, the mounting holes of the fasteners are sealed with sealing components to prevent external air, moisture and impurities from entering the mounting holes, thereby reducing the oxidation and rusting of bolts during use of the coupling, thus making the bolts on the coupling easy to disassemble.

[0021] 2. In this utility model, the retaining sleeve on the outside of the fastening bolt can prevent the bolt from loosening due to vibration, and the engagement between the inner convex ring and the groove forms a mechanical lock. The compression deformation of the rubber ring locks the fastening bolt, thereby improving the stability of the fastening bolt. Attached Figure Description

[0022] Figure 1 This is a three-dimensional structural diagram of the overall device in this utility model;

[0023] Figure 2 This is a three-dimensional structural diagram of the disassembled integral device in this utility model;

[0024] Figure 3 This is a three-dimensional structural diagram of the convex ring and the baffle in this utility model;

[0025] Figure 4 This utility model Figure 2 A magnified three-dimensional structural diagram at point A in the middle.

[0026] Legend:

[0027] 1. Connector a; 2. Fixing component; 3. Connector b; 4. Buffer component; 5. Auxiliary component; 51. Auxiliary component; 52. Sealing component; 53. Slot; 54. Fastening bolt; 55. Raised ring; 56. Baffle; 57. Rubber ring; 58. Groove. Detailed Implementation

[0028] 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 of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0029] Reference Figures 1-3 This utility model provides an embodiment of a quick-disassembly and assembly induced draft fan and small steam turbine coupling structure, including a connector a1, which serves as the active end connection component of the coupling, with its front end used to install the induced draft fan shaft. A connector b3 is provided on the rear side of connector a1, serving as the driven end connection component of the coupling, with its rear end connected to the small steam turbine shaft. The front end is connected to connector a1 via a buffer component 4. A fixing component 2 is fixedly installed on the upper part of connector a1 by bolts to fix the induced draft fan shaft and the small steam turbine shaft. A buffer component 4 is provided between connector a1 and connector b3. The buffer component 4 is shaped like a plum blossom and is made of polyurethane or nitrile rubber with a Shore A hardness of 80±5. It is installed between connector a1 and connector b3. An auxiliary component 5 is provided on the upper part of the fixing component 2.

[0030] Reference Figures 2-4 The auxiliary component 5 includes an auxiliary component 51 that fits onto the outside of the fixing component 2. The auxiliary component 51 is arc-shaped, made of Q235 steel plate by stamping, and galvanized for rust prevention. It provides a mounting base for the rubber ring 57. A sealing component 52 is fixedly connected to the lower part of the auxiliary component 51. A groove 53 is provided on the inner wall of the fixing component 2. An annular protrusion is provided on the outer side of the sealing component 52. The annular protrusion on the outer side of the sealing component 52 engages with the groove 53. It is made of fluororubber FKM material and is press-fitted into the groove 53 of the fixing component 2 to seal the mounting hole of the fixing component 2. It can maintain a sealing pressure ≥0.2MPa in the temperature range of -30℃ to 200℃, preventing air, moisture and impurities from entering the mounting hole, and reducing the bolt oxidation rate by more than 90%. The sealing component 52 is inserted into the inner wall of the fixing component 2. The auxiliary component 51 is fixedly installed on the upper part of the fixing component 2 by fastening bolts 54. The fastening bolts 54 are used to fix the auxiliary component 51.

[0031] Reference Figures 2-4A retainer 56 with the same diameter as the head of the fastening bolt 54 is fixedly connected to the upper outer side of the fastening bolt 54. After installation, it is used to limit the outer side of the rubber ring 57 to prevent deformation of the outer periphery of the rubber ring 57. A convex ring 55 is provided on the inner side of the fastening bolt 54 near the retainer 56. A rubber ring 57 is fixedly connected to the upper part of the auxiliary component 51. The rubber ring 57 passes through the auxiliary component 51 and seals the connection between the fastening bolt 54 and the auxiliary component 51 to prevent rust. A groove 58 is opened on the inner wall of the rubber ring 57. The convex ring 55 is engaged with the inner wall of the groove 58. The convex ring 55 is an annular protrusion with a height of 1mm and an inclination angle of 15° on the inner side of the fastening bolt 54. The groove 58 is an annular groove on the inner wall of the rubber ring 57. After the two are engaged, a circumferential mechanical lock is formed to prevent the bolt from rotating. The fit clearance is ≤0.03mm. Radial compressive stress is generated when engaged, which increases the friction between the fastening bolt 54 and the rubber ring 57.

[0032] Working principle: When in use, align the sealing element 52 of the auxiliary component 5 with the inner wall of the fixing element 2, and insert its outer annular protrusion along the guide groove of the slot 53. Because the sealing element 52 is made of elastic fluororubber, it will deform by 0.1mm when inserted, ensuring an interference fit with the slot 53 and completing the initial sealing of the mounting hole.

[0033] The arc-shaped auxiliary component 51 fits against the outer curved surface of the fixing component 2. At this time, the sealing component 52 completely covers the bolt mounting hole of the fixing component 2. The fastening bolt 54 passes through the mounting hole of the auxiliary component 51 and is screwed into the threaded hole of the fixing component 2. When the bolt head presses against the auxiliary component 51, its inner convex ring 55 squeezes the groove 58 on the inner wall of the rubber ring 57. The rubber ring 57 produces an elastic deformation of 0.2mm. At the same time, the convex ring 55 and the groove 58 are engaged. The inner side of the outer baffle 56 fits against the outer side of the rubber ring 57.

[0034] During equipment operation, the seal 52 expands slightly due to temperature increases, reaching up to 120°C. This increases the interference fit with the groove 53, continuously blocking external moisture and impurities. When the equipment needs maintenance or replacement of the buffer 4, use a wrench to loosen the fastening bolt 54. As the fastening bolt 54 rotates, the friction of the convex ring 55 along the groove 58 moves the auxiliary component 51 upward, causing the seal 52 to disengage from the groove 53 of the fixing component 2, exposing the mounting hole. This allows for the removal of the internal bolts, reducing disassembly time in the absence of rust and impurities.

[0035] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present 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 or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A quick detachable induced draft fan small steam turbine coupling structure comprising a connecting member a (1), characterized in that: A connector b (3) is provided on the rear side of the connector a (1), a fixing component (2) is fixedly installed on the upper part of the connector a (1) by bolts, a buffer component (4) is provided between the connector a (1) and the connector b (3), and an auxiliary component (5) is provided on the upper part of the fixing component (2). The auxiliary component (5) includes an auxiliary component (51) attached to the outside of the fixing component (2), a sealing component (52) is fixedly connected to the lower part of the auxiliary component (51), the sealing component (52) is inserted into the inner wall of the fixing component (2), and the auxiliary component (51) is fixedly installed on the upper part of the fixing component (2) by fastening bolts (54).

2. The quick detachable induced draft fan small steam turbine coupling structure according to claim 1, characterized in that: A stop cylinder (56) is fixedly connected to the upper outer side of the fastening bolt (54), and a protruding ring (55) is provided on the inner side of the fastening bolt (54) near the stop cylinder (56). A rubber ring (57) is fixedly connected to the upper part of the auxiliary component (51), and a groove (58) is provided on the inner wall of the rubber ring (57).

3. The quick detachable induced draft fan small steam turbine coupling structure according to claim 2, characterized in that: The protruding ring (55) is engaged with the inner wall of the groove (58).

4. The quick detachable induced draft fan small steam turbine coupling structure according to claim 1, characterized in that: The auxiliary component (51) is configured as an arc shape.

5. The quick detachable induced draft fan small steam turbine coupling structure according to claim 1, characterized in that: The inner wall of the fastener (2) is provided with a slot (53), and the outer side of the seal (52) is provided with an annular protrusion.

6. The quick detachable induced draft fan small steam turbine coupling structure according to claim 1, characterized in that: The annular protrusion on the outer side of the seal (52) engages with the groove (53).

7. The quick detachable induced draft fan small steam turbine coupling structure according to claim 1, characterized in that: The buffer (4) is configured in a plum blossom shape.

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