Auxiliary tool for jacking rotor of axial flow fan with adjustable movable blades

Abstract

The utility model discloses an auxiliary tool for jacking a rotor of an axial flow fan with adjustable moving blades, which comprises a cuboid body, an arc-shaped notch is arranged at the upper end of the left side of the body, and a plurality of auxiliary tool bolt holes are arranged on the body close to the arc-shaped notch. The auxiliary tool for jacking the rotor of the axial flow fan with the adjustable moving blades is provided by utilizing the structural characteristics of the hub of the rotor of the fan, the jacking auxiliary tools are respectively arranged on the left side and the right side of the hub of each stage, and the bolt holes of the auxiliary tools are fixedly connected with the bolts on the hub, so that the rotor of the axial flow fan can be jacked. The left and right split surfaces of the rotor are respectively provided with a corresponding jack, the top of each jack is in length contact with the lower surface of the auxiliary tool, two workers operate the jacks simultaneously, and the fan hub can be jacked and finely adjusted. The device is simple in conception and strong in operability, and well solves the practical problems in the fan transformation project.

Description

Technical Field

[0001] The utility model belongs to the technical field of thermal power generation, and in particular relates to a jacking of an axial flow fan rotor with adjustable moving blades. Background Art

[0002] A thermal power plant carried out an ultra-low emission transformation project for the units, and simultaneously carried out the combined transformation of the induced draft fan and the booster fan. Due to the small space in the induced draft fan area of ​​the power plant, when installing the induced draft fan rotor on the A side, the foundation of the induced draft fan on the B side must be partially dismantled first, so that the induced draft fan equipment and crane can smoothly reach the vicinity of the induced draft fan foundation of A and complete the installation of the induced draft fan equipment of A. The induced draft fan transformation project is to transform the original axial flow fan with adjustable static blades into a two-stage axial flow induced draft fan with adjustable moving blades. The center line of the rotor is moved backward, and the weight of the rotor becomes larger, so the original electric hoist on the fan side is not applicable.

[0003] During the acceptance, it was found that the secondary hub air seal gap of the A induced draft fan did not meet the technical requirements. It was necessary to reposition the A induced draft fan rotor and further check the reasons why the secondary hub air seal gap did not meet the technical requirements. At this time, the A and B side induced draft fans had been installed. Due to the limitations of the site, mobile cranes or crawler cranes could not be used, and the new electric hoist on the fan side had not been modified and could not be used. Utility Model Content

[0004] The utility model aims to provide an auxiliary tool for lifting the rotor of an axial flow fan with adjustable moving blades. The auxiliary tool for lifting the fan rotor, in combination with a corresponding jack, can lift the fan rotor and fine-tune its position.

[0005] The utility model is realized by the following technical solutions:

[0006] An auxiliary tool for lifting the rotor of an axial flow fan with adjustable moving blades comprises a main body which is in the shape of a rectangular parallelepiped. An arc-shaped notch is provided at the upper left end of the main body. A plurality of auxiliary tool bolt holes are also provided on the main body near the arc-shaped notch. The auxiliary tool bolt holes are used for bolt connection with the inner ring of the fan hub.

[0007] A further improvement of the utility model is that the contour expression of the arc-shaped notch is: Where n1 is the number of bolts on the fan hub, n2 is the number of bolt holes on the auxiliary tool, and r is the radius of the circle formed by the bolts on the fan hub.

[0008] A further improvement of the utility model is that the number n2 of the bolt holes on the auxiliary tool is ≥3.

[0009] A further improvement of the utility model is that the diameter of the auxiliary tool bolt hole is Φ2, and Φ2=(Φ1+2)~(Φ1+4), and Φ1 is the diameter of the fan hub bolt.

[0010] A further improvement of the utility model is that the thickness of the auxiliary tool is δ=16mm-22mm.

[0011] A further improvement of the utility model is that the height of the auxiliary tool is h1 = 220 mm to 300 mm.

[0012] A further improvement of the utility model is that the length of the lower surface of the auxiliary tool is L1 = 450mm-550mm.

[0013] A further improvement of the utility model is that the short side of the left side of the auxiliary tool is L3 = 0-10 mm.

[0014] A further improvement of the utility model is that the length of the upper surface of the auxiliary tool is L4=450mm-550mm.

[0015] A further improvement of the utility model is that the auxiliary tool is made by combining laser cutting with machine tool processing.

[0016] The utility model has at least the following beneficial technical effects:

[0017] The utility model provides an auxiliary tool for lifting the rotor of an axial flow fan with adjustable moving blades. Combined with the structural characteristics of the axial flow fan with adjustable moving blades, a rectangular main body is adopted, and an arc-shaped notch is opened at the upper left end of the main body. A number of auxiliary tool bolt holes are opened on the main body near the arc-shaped notch. When in use, the auxiliary tool bolt holes are connected with the inner ring bolts of the fan hub, and with the corresponding jack, the fan rotor can be lifted and the position can be fine-tuned. The utility model solves the problem of lifting and repositioning the fan rotor when mobile cranes, crawler cranes and electric hoists cannot be used. Therefore, the utility model has significant effects and is simple and practical, and better solves the practical problems encountered at the construction site. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 The utility model is a schematic diagram of an auxiliary tool for lifting the rotor of an axial flow fan with adjustable moving blades.

[0019] Description of reference numerals:

[0020] 1. Height of auxiliary tool, 2. Length of lower surface of auxiliary tool, 3. Bolt hole of auxiliary tool, 4. Arc length of left side of auxiliary tool, 5. Short side of left side of auxiliary tool, 6. Length of upper surface of auxiliary tool. DETAILED DESCRIPTION

[0021] The exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided in order to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art. It should be noted that, in the absence of conflict, the embodiments in the present utility model and the features in the embodiments can be combined with each other. The present utility model will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0022] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0023] It should also be understood that the terms used in the utility model specification are only for the purpose of describing specific embodiments and are not intended to limit the utility model. As used in the utility model specification and the appended claims, unless the context clearly indicates otherwise, the singular forms "a", "an" and "the" are intended to include plural forms.

[0024] The accompanying drawings show various structural schematic diagrams of the embodiments disclosed in the utility model. These figures are not drawn to scale, and some details are magnified and some details may be omitted for the purpose of clear expression. The shapes of various regions and layers shown in the figures and the relative sizes and positional relationships therebetween are only exemplary, and may deviate in practice due to manufacturing tolerances or technical limitations, and those skilled in the art may additionally design regions / layers with different shapes, sizes, and relative positions according to actual needs.

[0025] Example 1

[0026] like Figure 1 As shown, the utility model provides an auxiliary tool for lifting the rotor of an axial flow fan with adjustable moving blades, including a main body, which is in the shape of a rectangular parallelepiped, with an arc-shaped notch on the left upper end of the main body, and a plurality of auxiliary tool bolt holes 3 are also provided on the main body near the arc-shaped notch, and the auxiliary tool bolt holes 3 are used for connecting with the inner ring of the fan hub bolts.

[0027] like Figure 1 As shown, in this embodiment, regarding the external shape structure of the auxiliary tool, the external shape structure includes an auxiliary tool height 1, an auxiliary tool lower surface length 2, an auxiliary tool bolt hole 3, an auxiliary tool left side arc length 4, an auxiliary tool left side short side 5, and an auxiliary tool upper surface length 6.

[0028] The following is a detailed description of each part of the appearance structure:

[0029] In this embodiment, the auxiliary tool has a height 1, h1 = 220 mm to 300 mm, and a thickness δ = 16 mm to 22 mm.

[0030] In this embodiment, the length 2 of the lower surface of the auxiliary tool is L1 = 450 mm-550 mm, and the thickness δ is 16 mm-22 mm.

[0031] In this embodiment, the number of auxiliary tool bolt holes 3, n2≥3, and in this embodiment, 3 auxiliary tool bolt holes are selected; Ф2=(Ф1+2)~(Ф1+4), Ф1 is the diameter of the fan hub bolt, and Ф2 is the hole diameter of the auxiliary tool bolt hole.

[0032] In this embodiment, the arc length of the left side of the auxiliary tool is 4, which is Where n1 is the number of bolts on the fan hub, n2 is the number of bolt holes on the auxiliary tool, and r is the radius of the circle formed by the bolts on the fan hub.

[0033] In this embodiment, the left short side 5 of the auxiliary tool is L3 = 0-10 mm, and the thickness δ = 16 mm-22 mm.

[0034] In this embodiment, the length 6 of the upper surface of the auxiliary tool is L4=450mm-550mm, and the thickness δ=16mm-22mm.

[0035] In this embodiment, the auxiliary tool can be made by combining laser cutting with machine tool processing.

[0036] The working principle of the laser cutting machine is to focus the laser emitted from the laser into a high-power density laser beam through the optical path system. When the laser beam irradiates the surface of the workpiece, the workpiece will quickly reach the melting point or boiling point, and at the same time, the high-pressure gas coaxial with the beam will blow away the melted or vaporized metal. As the relative position of the beam and the workpiece moves, the material will eventually form a slit, thereby achieving the purpose of cutting.

[0037] Machine tool processing is a process that relies on machine tools to ensure the relative motion relationship between the tool and the fixture, and then uses the tool to process the workpiece mounted on the fixture. The core principle of machine tool processing is the cutting principle, that is, by moving the tool and the workpiece relative to each other, forming a cutting surface between the tool and the workpiece and applying a certain pressure, the tool cuts off the material on the workpiece, thereby obtaining a workpiece with the required shape and precision. The cutting principle includes two methods: secant cutting and reverse cutting.

[0038] The utility model provides an auxiliary tool for lifting the rotor of an axial flow fan with adjustable moving blades. The auxiliary tool is connected to the inner ring of the fan hub by bolts through the bolt hole 3 of the auxiliary tool when in use, and then the pre-prepared jack is placed on the middle plane of the fan, and the top of the jack is aligned with the length 6 of the upper surface of the auxiliary tool. A lifting auxiliary tool is installed on the left and right sides of each level of the fan hub. Two construction workers operate the jacks at the same time to perform lifting operations, and the fan hub can be lifted and fine-tuned. The utility model has a simple concept and strong operability, and better solves the practical problems in the fan transformation project.

[0039] Example 2

[0040] like Figure 1 As shown, the utility model provides an auxiliary tool for lifting the rotor of an axial flow fan with adjustable moving blades, including a main body, which is in the shape of a rectangular parallelepiped, with an arc-shaped notch on the left upper end of the main body, and a plurality of auxiliary tool bolt holes 3 are also provided on the main body near the arc-shaped notch, and the auxiliary tool bolt holes 3 are used for connecting with the inner ring of the fan hub bolts.

[0041] In this embodiment, the auxiliary tool has a height 1, h1 = 220 mm and a thickness δ = 20 mm.

[0042] In this embodiment, the length 2 of the lower surface of the auxiliary tool is L1 = 450 mm, and the thickness δ is 20 mm.

[0043] In this embodiment, there are 3 auxiliary tool bolt holes, the number n2=3; Ф2=Ф1+3, Ф1 is the diameter of the fan hub bolt, and Ф2 is the hole diameter of the auxiliary tool bolt hole.

[0044] In this embodiment, the arc length of the left side of the auxiliary tool is 4, which is Where n1 is the number of bolts on the fan hub, n2 is the number of bolt holes on the auxiliary tool, and r is the radius of the circle formed by the bolts on the fan hub.

[0045] In this embodiment, the left short side 5 of the auxiliary tool has a length L3 = 2 mm and a thickness δ = 20 mm.

[0046] In this embodiment, the length 6 of the upper surface of the auxiliary tool is L4=450 mm, and the thickness δ=20 mm.

[0047] The application of this embodiment is as follows:

[0048] A thermal power plant carried out an ultra-low emission transformation project for the units, and simultaneously carried out the combined transformation of the induced draft fan and the booster fan. Due to the small space in the induced draft fan area of ​​the power plant, when installing the induced draft fan rotor on the A side, the foundation of the induced draft fan on the B side must be partially dismantled first, so that the equipment and crane of the induced draft fan A can smoothly reach the vicinity of the induced draft fan foundation and complete the installation of the induced draft fan equipment. The induced draft fan transformation project is to transform the original axial flow fan with adjustable static blades into a two-stage axial flow induced draft fan with adjustable moving blades. The center line of the rotor is moved backward, and the weight of the rotor becomes larger, so the original electric hoist on the fan side is not applicable.

[0049] During the acceptance, it was found that the secondary hub air seal gap of induced draft fan A did not meet the technical requirements. It was necessary to reposition the rotor of induced draft fan A and further check the reasons why the secondary hub air seal gap did not meet the technical requirements. At this time, the induced draft fans on the A and B sides had been installed, and mobile cranes, crawler cranes and electric hoists could not be used. In addition, the new electric hoist had not been modified and could not be used. Against this technical background, the on-site technicians proposed an auxiliary tool for lifting the rotor of an axial flow fan with adjustable blades, combined with the structural properties of the equipment itself. An auxiliary tool for lifting the rotor of an axial flow fan with adjustable blades was used, and the secondary hub of induced draft fan A was lifted and repositioned in cooperation with a jack.

[0050] The above shows and describes the basic principles and main features of the utility model and the advantages of the utility model. For those skilled in the art, it is obvious that the utility model is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic features of the utility model. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the utility model is defined by the attached claims rather than the above description, and it is intended to include all changes within the meaning and scope of the equivalent elements of the claims. Any figure mark in the claims should not be regarded as limiting the claims involved.

[0051] In addition, it should be understood that although this specification is described in accordance with the implementation methods, not every implementation method contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should take the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art. The above content is only to illustrate the technical idea of ​​the utility model, and cannot be used to limit the protection scope of the utility model. Any changes made on the basis of the technical solution in accordance with the technical idea proposed by the utility model shall fall within the protection scope of the claims of the utility model.

Claims

1. An auxiliary tool for lifting the rotor of an axial flow fan with adjustable moving blades, characterized in that: It includes a main body, which is in a rectangular shape. An arc-shaped notch is opened on the upper left end of the main body. A plurality of auxiliary tool bolt holes are also opened on the main body near the arc-shaped notch. The auxiliary tool bolt holes are used to connect with the inner ring of the fan hub bolts.

2. The auxiliary tool for lifting the rotor of an axial flow fan with adjustable moving blades according to claim 1, characterized in that: The contour expression of the arc-shaped notch is: Where n1 is the number of bolts on the fan hub, n2 is the number of bolt holes on the auxiliary tool, and r is the radius of the circle formed by the bolts on the fan hub.

3. The auxiliary tool for lifting the rotor of an axial flow fan with adjustable moving blades according to claim 2, characterized in that: The number of bolt holes on the auxiliary tool n2≥3.

4. The auxiliary tool for lifting the rotor of an axial flow fan with adjustable moving blades according to claim 1, characterized in that: The hole diameter of the auxiliary tool bolt hole is Ф2, and Ф2=(Ф1+2)~(Ф1+4), and Ф1 is the diameter of the fan hub bolt.

5. The auxiliary tool for lifting the rotor of an axial flow fan with adjustable moving blades according to claim 1, characterized in that: The thickness of the auxiliary tool is δ=16 mm to 22 mm.

6. The auxiliary tool for lifting the rotor of an axial flow fan with adjustable moving blades according to claim 1, characterized in that: The height of the auxiliary tool is h1 = 220 mm to 300 mm.

7. The auxiliary tool for lifting the rotor of an axial flow fan with adjustable moving blades according to claim 1, characterized in that: The length of the lower surface of the auxiliary tool is L1 = 450 mm-550 mm.

8. The auxiliary tool for lifting the rotor of an axial flow fan with adjustable moving blades according to claim 1, characterized in that: The short side of the left side of the auxiliary tool is L3 = 0-10 mm.

9. The auxiliary tool for lifting the rotor of an axial flow fan with adjustable moving blades according to claim 1, characterized in that: The length of the upper surface of the auxiliary tool is L4=450mm-550mm.

10. The auxiliary tool for lifting the rotor of an axial flow fan with adjustable moving blades according to claim 1, characterized in that: The auxiliary tool is made by combining laser cutting with machine tool processing.

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