Hoisting device for rotor of axial flow fan

Abstract

The utility model relates to the technical field of lifting equipment, in particular to an axial flow fan rotor lifting device which comprises a mounting seat, a lifting lug arranged above the mounting seat, a cross rod arranged below the mounting seat, lifting rings arranged at two ends of the upper surface of the cross rod, and each lifting ring connected with the mounting seat through a steel rope. Connecting shafts are coaxially arranged at the two ends of the cross rod, a hoisting seat is arranged on the connecting shafts, hanging grooves are formed in the two sides of the hoisting seat, a hoisting belt is vertically arranged below the hoisting seat, and the two ends of the hoisting belt are hung in the hanging grooves respectively. According to the hoisting device, the hoisting seats are arranged at the two ends of the cross rod, and the hanging grooves are formed in the hoisting seats, so that when the hoisting device is used, the two ends of the hoisting belt are respectively hung in the hanging grooves, the hoisting belt forms a U-shaped structure, a rotor is placed in the U-shaped structure formed by the hoisting belt, the pulling force of the hoisting belt is vertically upward in the hoisting process, and horizontal component force cannot be generated; and friction between the hoisting belts and the rotor is avoided, and the surface quality of the rotor in the hoisting process is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of lifting equipment, in particular to a lifting device for an axial flow fan rotor. Background Art

[0002] Axial flow fans are high-speed precision equipment, and their internal rotors are the high-speed rotating equipment. The rotor is inside the fan casing and supported by bearing seats at both ends. Its own balance and installation accuracy have a great impact on the vibration, noise, and service life of the fan. Therefore, the protection and installation of the rotor are extremely important. Precision long-rod equipment such as axial flow fan rotors generally have a heavy body, complex structures of each section, and stepped sections on both sides. Each step surface has different functions, including load-bearing surfaces and sealing surfaces. Each step surface needs to be protected during transportation and hoisting.

[0003] Chinese utility model patent CN214879497U discloses an engine rotor hoisting device, including a crossbar assembly and a lifting assembly, wherein the crossbar assembly is mainly connected to a crane or a traveling crane, and the lifting assembly is mainly matched with the engine rotor. The device described in the utility model can adjust the sliding support at equal intervals to keep the center of gravity of the engine rotor consistent, and limit the engine rotor through a second lifting chain, which can well protect the engine rotor from touching other workpieces during the hoisting process, and ensure the horizontality of the engine rotor during the hoisting process so that it will not tilt.

[0004] The above patent can complete the lifting of shaft parts, but there are still some problems: the second lifting chain and the lifting ear are tilted, and the second lifting chain will apply a horizontal component force to the lifting ear during lifting. This horizontal component force may cause friction between the lifting ear and the rotor, thereby causing wear on the surface of the rotor and affecting the performance of the parts. Utility Model Content

[0005] The technical problem to be solved by the utility model is to provide an axial flow fan rotor lifting device, which is used for ensuring the surface quality of the rotor when the rotor is hoisted.

[0006] The technical solution adopted by the utility model to solve its technical problems is an axial flow fan rotor lifting device, comprising a mounting seat, a lifting ear is arranged on the mounting seat, a cross bar is arranged below the mounting seat, and both ends of the upper surface of the cross bar are provided with lifting rings, each of the lifting rings is connected to the mounting seat by a steel rope; connecting shafts are coaxially arranged at both ends of the cross bar, a lifting seat is arranged on the connecting shaft, hanging grooves are arranged on both sides of the lifting seat, a sling is vertically arranged below the lifting seat, and both ends of the sling are respectively hung in a hanging groove.

[0007] Furthermore, the lifting seat is provided with a connecting hole for use with the connecting shaft, the connecting shaft is provided with a connecting key extending along the axial direction of the connecting shaft, and the hole wall of the connecting hole is provided with a connecting groove for use with the connecting key.

[0008] Furthermore, the diameter of the connecting shaft is smaller than the diameter of the cross bar, an end of the connecting shaft away from the cross bar is provided with an external thread, and a locking nut used in conjunction with the external thread is provided on the connecting shaft.

[0009] Furthermore, the lifting seat is provided with a connecting hole for use with the connecting shaft, the connecting shaft is provided with a limiting ring groove, the lifting seat is provided with a threaded hole for use with the limiting ring groove, a fixing nut is provided in the threaded hole, and the bottom end of the fixing nut abuts against the bottom wall of the limiting ring groove.

[0010] Furthermore, the sling is made of polyester or polypropylene.

[0011] Furthermore, the angle between the two steel ropes is 60°-120°.

[0012] Furthermore, the bottom surface of the hanging groove is an arc surface.

[0013] The beneficial effect of the utility model is as follows: by arranging lifting seats at both ends of the cross bar and arranging hanging grooves on the lifting seats, when in use, the two ends of the lifting belt are respectively hung in a hanging groove, so that the lifting belt forms a U-shaped structure, and the rotor is placed in the U-shaped structure formed by the lifting belt. During the lifting process, the pulling force of the lifting belt is vertically upward, and no horizontal force component is generated, so that there is no tendency for horizontal movement between the lifting belt and the rotor, thereby avoiding friction between the lifting belt and the rotor, and ensuring the surface quality of the rotor during the lifting process. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of the first embodiment of the utility model;

[0015] Figure 2 yes Figure 1 Schematic diagram of the middle lifting seat;

[0016] Figure 3 yes Figure 1 Schematic diagram of the connection between the middle lifting seat and the lifting belt;

[0017] Figure 4 yes Figure 1 Schematic diagram of the connecting shaft;

[0018] Figure 5 It is a structural schematic diagram of the second embodiment of the utility model;

[0019] Figure 6 yes Figure 5 Schematic diagram of the connecting shaft;

[0020] Figure 7 yes Figure 5 Schematic diagram of the middle lifting mount.

[0021] Figure markings: 1-mounting seat; 2-lifting ear; 3-cross bar; 4-lifting ring; 5-steel rope; 6-connecting shaft; 601-connecting key; 602-external thread; 603-locking nut; 604-limiting ring groove; 7-lifting seat; 701-connecting hole; 702-connecting groove; 703-fixing nut; 8-hanging groove; 9-sling; 10-rotor. DETAILED DESCRIPTION

[0022] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0023] like Figure 1-Figure 4 As shown, the utility model axial flow fan rotor lifting device includes a mounting base 1, a lifting ear 2 is arranged on the mounting base 1, a cross bar 3 is arranged below the mounting base 1, and both ends of the upper surface of the cross bar 3 are provided with lifting rings 4, each of the lifting rings 4 is connected to the mounting base 1 through a steel rope 5; connecting shafts 6 are coaxially arranged at both ends of the cross bar 3, a lifting base 7 is arranged on the connecting shaft 6, hanging grooves 8 are arranged on both sides of the lifting base 7, and a sling 9 is vertically arranged below the lifting base 7, and both ends of the sling 9 are respectively hung in a hanging groove 8.

[0024] Among them, the lifting ear 2 is fixedly connected to the mounting seat 1, and when in use, the lifting ear 2 is connected to the crane or the crane; the cross bar 3 is a steel round bar or square bar, and the lifting ring 4 is welded on the upper surface of the cross bar 3, and each lifting ring 4 is connected to the mounting seat 1 through a steel rope 5, so that the cross bar 3, the steel rope 5 and the mounting seat 1 form a stable triangular structure; the connecting shaft 6 and the cross bar 3 can be integrally formed, and if the connecting shaft 6 is also made of steel, it can also be connected by welding; the lifting seat 7 is made of steel, and the lifting seat 7 and the connecting shaft 6 can be connected by welding, the opening of the hanging groove 8 is upward, and the bottom walls of the two hanging grooves 8 are at the same height; the sling 9 can be made of polyester The sling 9 can be a nylon belt or a polypropylene belt, and the two ends of the sling 9 can be a ring buckle structure wrapped around the sling 9 itself, or an external ring buckle, and the two ends of the sling 9 are respectively hung in a hanging groove 8, so that the sling 9 forms a U-shaped structure. When in use, the rotor 10 is placed at the lowest point inside the U-shaped structure. At the same time, the distance between the lifting points of the rotor 10 is consistent with the distance between the two slings 9, so that the sling 9 is always in a vertical state, and no horizontal force is generated, and then there is no tendency of horizontal movement between the sling 9 and the rotor 10, thereby avoiding friction between the sling 9 and the rotor 10, and ensuring the surface quality of the rotor 10 during the lifting process.

[0025] The lifting seat 7 and the connecting shaft 6 can be connected by welding, but this method is very troublesome to disassemble. Figure 2 and Figure 4 The lifting seat 7 is provided with a connecting hole 701 used in conjunction with the connecting shaft 6, the connecting shaft 6 is provided with a connecting key 601 extending along the axial direction of the connecting shaft 6, and the hole wall of the connecting hole 701 is provided with a connecting groove 702 used in conjunction with the connecting key 601. The lifting seat 7 is sleeved on the connecting shaft 6 through the connecting hole 701. The diameter of the connecting hole 701 is larger than the diameter of the connecting shaft 6. In order to prevent the lifting seat 7 from rotating relative to the connecting shaft 6, a connecting key 601 is provided on the connecting shaft 6. The connecting key 601 can be integrally formed with the connecting shaft 6. The width of the connecting key 601 is smaller than the width of the connecting groove 702, so as to facilitate the connection between the connecting key 601 and the connecting groove 702. The connecting key 601 is used in conjunction with the connecting groove 702. For example, the cross section of the connecting key 601 can be rectangular, and the cross section of the connecting groove 702 is also rectangular; the connecting key 601 is a dovetail block, and the connecting groove 702 is a dovetail groove. Such an arrangement can limit the rotation of the hoisting seat 7 and ensure stability during the hoisting process.

[0026] In order to prevent the lifting seat 7 from axial displacement relative to the connecting shaft 6, further see Figure 4The diameter of the connecting shaft 6 is smaller than the diameter of the cross bar 3. The end of the connecting shaft 6 away from the cross bar 3 is provided with an external thread 602. The connecting shaft 6 is provided with a locking nut 603 used in conjunction with the external thread 602. After the hanging seat 7 is installed on the connecting shaft 6, the nut is screwed on the external thread 602. At the same time, the diameter of the connecting shaft is smaller than the diameter of the cross bar 3. In this way, the axial limit of the hanging seat 7 can be achieved under the action of the nut and the end face of the cross bar 3.

[0027] As another example, see Figure 5-Figure 7 The lifting seat 7 is provided with a connection hole 701 used in conjunction with the connection shaft 6, the connection shaft 6 is provided with a limit ring groove 604, the lifting seat 7 is provided with a threaded hole used in conjunction with the limit ring groove 604, a fixing nut 703 is provided in the threaded hole, and the bottom end of the fixing nut 703 abuts against the bottom wall of the limit ring groove 604. When in use, the fixing nut 703 is screwed into the threaded hole, and the lifting seat 7 can be fixed after the bottom end of the fixing nut 703 abuts against the bottom wall of the limit ring groove 604.

[0028] In order to prevent the angle between the two steel ropes 5 from being too large, which would cause the cross bar 3 to bend due to excessive shear force, further, the angle between the two steel ropes 5 is 60°-120°.

[0029] In order to prevent the hanging groove 8 from cutting the sling 9 during the lifting process. Figure 2 The bottom surface of the hanging groove 8 is an arc surface.

[0030] The embodiments of this specific implementation method are all preferred embodiments of the utility model, and are not intended to limit the protection scope of the utility model. Therefore, all equivalent changes made based on the structure, shape, and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. An axial flow fan rotor lifting device, comprising a mounting seat (1), wherein a lifting lug (2) is arranged on the mounting seat (1), a cross bar (3) is arranged below the mounting seat (1), and lifting rings (4) are arranged at both ends of the upper surface of the cross bar (3), and each of the lifting rings (4) is connected to the mounting seat (1) through a steel rope (5); characterized in that: Connecting shafts (6) are coaxially arranged at both ends of the crossbar (3), a hanging seat (7) is arranged on the connecting shaft (6), hanging grooves (8) are arranged on both sides of the hanging seat (7), a hanging belt (9) is vertically arranged below the hanging seat (7), and both ends of the hanging belt (9) are hung in a hanging groove (8) respectively.

2. The axial flow fan rotor lifting device according to claim 1, characterized in that: The lifting seat (7) is provided with a connecting hole (701) for use with the connecting shaft (6), the connecting shaft (6) is provided with a connecting key (601) extending along the axial direction of the connecting shaft (6), and the hole wall of the connecting hole (701) is provided with a connecting groove (702) for use with the connecting key (601).

3. The axial flow fan rotor lifting device according to claim 2, characterized in that: The diameter of the connecting shaft (6) is smaller than the diameter of the cross bar (3); an end of the connecting shaft (6) away from the cross bar (3) is provided with an external thread (602); and a locking nut (603) used in conjunction with the external thread (602) is provided on the connecting shaft (6).

4. The axial flow fan rotor lifting device according to claim 1, characterized in that: The lifting seat (7) is provided with a connecting hole (701) for use with the connecting shaft (6), the connecting shaft (6) is provided with a limiting ring groove (604), the lifting seat (7) is provided with a threaded hole for use with the limiting ring groove (604), a fixing nut (703) is provided in the threaded hole, and the bottom end of the fixing nut (703) abuts against the bottom wall of the limiting ring groove (604).

5. The axial flow fan rotor lifting device according to claim 1, characterized in that: The sling (9) is made of polyester or polypropylene.

6. The axial flow fan rotor lifting device according to claim 1, characterized in that: The angle between the two steel ropes (5) is 60°-120°.

7. The axial flow fan rotor lifting device according to claim 1, characterized in that: The bottom surface of the hanging groove (8) is an arc surface.

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