Balanced hoisting and lifting device for steam turbine rotor

Abstract

The utility model discloses a steam turbine rotor balance hoisting and lifting device which comprises a hoisting rod, a hoisting rope and a vertical hoisting assembly. The hanging rod is transversely arranged, and a hanging structure connected with a crane is arranged in the middle of the hanging rod. The number of the lifting ropes and the number of the vertical lifting assemblies are both two, one lifting rope is connected between one end of the lifting rod and one vertical lifting assembly, and the other lifting rope is connected between the other end of the lifting rod and the other vertical lifting assembly. Each group of vertical hoisting assemblies comprises vertical guide rods, a hoisting seat and a hoisting belt, the number of the vertical guide rods in the same group is two, the hoisting seat is connected with the hoisting rope, the hoisting seat can be vertically connected to the two vertical guide rods in a sliding mode, and the two ends of the hoisting belt are fixedly connected to the hoisting seat. The hoisting and lifting device can be used for hoisting the steam turbine rotor in a relatively balanced and stable manner, so that interference or collision between the steam turbine rotor and a cylinder body is effectively prevented.

Description

TECHNICAL FIELD

[0001] The utility model relates to a hoist, concretely relates to a steam turbine rotor balance hoist lifting device. BACKGROUND

[0002] When the steam turbine is overhauled, the cylinder cover of the steam turbine needs to be first disassembled and hoisted away, and then the steam turbine rotor is hoisted out, since the position relationship between the blades and the cavity of the steam turbine rotor is relatively close and the matching precision is high, therefore, great care needs to be taken during hoisting to prevent the steam turbine rotor from interfering with or colliding with the cylinder. The existing hoisting method mainly uses a hoist and a lifting rope to bind the two ends of the lifting rope to the steam turbine rotor, and when hoisting begins, the speed is relatively slow and the hoisting height of the two ends of the steam turbine rotor needs to be constantly observed to ensure that the steam turbine rotor is balanced and lifted. The above hoisting operation is not only relatively low in efficiency, but also the balance of the steam turbine rotor is completely judged by the naked eye, which has a large error and is not accurate enough, and accidents are prone to occur. SUMMARY

[0003] The utility model aims at overcoming the above-mentioned problems, and provides a steam turbine rotor balance hoist lifting device, which can hoist the steam turbine rotor relatively balanced and stably, and effectively prevent the steam turbine rotor from interfering with or colliding with the cylinder.

[0004] The utility model aims at overcoming the above-mentioned problems, and provides a steam turbine rotor balance hoist lifting device, which can hoist the steam turbine rotor relatively balanced and stably, and effectively prevent the steam turbine rotor from interfering with or colliding with the cylinder.

[0005] A steam turbine rotor balance hoist lifting device, comprising a boom, a lifting rope and a vertical hoist assembly;

[0006] The boom is horizontally arranged, and a hanger structure connected with a hoist is arranged at the middle part of the boom;

[0007] The lifting rope and the vertical hoist assembly are each provided with two groups, one group of the lifting rope is connected between one end of the boom and one group of the vertical hoist assembly, and the other group of the lifting rope is connected between the other end of the boom and the other group of the vertical hoist assembly; each group of the vertical hoist assembly comprises a vertical guide rod, a hoisting seat and a hoisting belt, the same group of vertical guide rods is provided with two, the hoisting seat is connected on the two vertical guide rods in a vertically slidable manner, and the two ends of the hoisting belt are fixedly connected on the hoisting seat; in the hoisting state, the two vertical guide rods of the same group are respectively located on the two sides of the steam turbine rotor shaft.

[0008] In one preferred embodiment of the utility model, each vertical lifting assembly further comprises a fixed pulley and a movable pulley, the fixed pulley comprises a first fixed pulley and a second fixed pulley, and the first fixed pulleys of the two vertical lifting assemblies are rotatably connected to the two ends of the lifting boom respectively; the second fixed pulley and the movable pulley of the same vertical lifting assembly are both provided with two, the two second fixed pulleys are rotatably connected to the top of the two vertical guide rods respectively, and the two movable pulleys are both rotatably connected to the lifting seat horizontally; in the overhead projection of the vertical lifting assembly, the first fixed pulley is located between the two second fixed pulleys, and the two movable pulleys are located between the two second fixed pulleys; and the two ends of the lifting rope are fixedly connected to the lifting seat, the lifting rope is wound above the fixed pulley, and the lifting rope is wound below the movable pulley.

[0009] Through the above structure, the lifting device is moved to the top of the steam turbine rotor by the crane, the lifting belt supports the steam turbine rotor first, and then the vertical guide rod is erected on the steam turbine cylinder, so that the two vertical guide rods of the same group are symmetrically placed on the two sides of the steam turbine rotor shaft, and the lifting seat is horizontally crossed on the steam turbine rotor shaft at this time; the lifting boom is lifted upward by the crane, the first fixed pulleys at the two ends of the lifting boom simultaneously pull the two lifting ropes upward, so that the two vertical lifting assemblies can move synchronously and keep balance; wherein, since the movable pulley is located between the first fixed pulley and the second fixed pulley, when the lifting rope is lifted upward, the movable pulley moves upward, and the lifting seat slides upward along the vertical guide rod, so that the steam turbine rotor is lifted upward by the lifting belt; further, since the lifting rope is wound above the second fixed pulley, the part of the weight of the steam turbine rotor is equivalent to being pressed on the vertical guide rod, so that the vertical guide rod can be stably erected on the steam turbine cylinder without the aid of other fixing tools, which is very ingenious; more importantly, in the lifting process, the vertical guide rod provides vertical guidance for the lifting seat, so that the steam turbine rotor can be balanced and smoothly lifted, and interference or collision between the steam turbine rotor and the cylinder is effectively prevented.

[0010] In one preferred embodiment of the utility model, the hanging structure comprises a connecting piece fixedly connected with the lifting boom, and the connecting piece is provided with a lifting hole.

[0011] In one preferred embodiment of the utility model, the lengths of the two lifting ropes are the same, so that the two vertical lifting assemblies can balanceably lift the steam turbine rotor.

[0012] In one preferred embodiment of the utility model, the bottom of the vertical guide rod is provided with a support part with a large area, which is supported on the cylinder with a large area to provide stability.

[0013] In one preferred embodiment of the utility model, the lifting seat is provided with a limiting part for providing limiting, so as to provide limiting when the lifting seat moves to the upper limit of the vertical guide rod.

[0014] In one preferred scheme of the utility model, the two second fixed pulleys are symmetrically arranged about the two movable pulleys.

[0015] Compared with the prior art, the utility model has the following beneficial effects:

[0016] The lifting device of the utility model can balance and stably lift the steam turbine rotor by providing the vertical guide rod and the lifting seat, and effectively prevents the steam turbine rotor from interfering with or colliding with the cylinder. BRIEF DESCRIPTION OF DRAWINGS

[0017] Fig. 1 It is a perspective view of the steam turbine rotor balancing lifting device of the utility model.

[0018] Figs. 2-3 It is a front view of two different states of the vertical lifting assembly of the utility model. DETAILED DESCRIPTION

[0019] In order to make the skilled in the art well understand the technical scheme of the utility model, the utility model is further described below in combination with the embodiments and the drawings, but the embodiment of the utility model is not limited to this.

[0020] Referring to Figs. 1-3 The steam turbine rotor balancing lifting device of the embodiment comprises a boom 1, a lifting rope 2 and a vertical lifting assembly; the boom 1 is horizontally arranged, and the middle part of the boom 1 is provided with a hanging structure connected with a crane; the hanging structure comprises a connecting piece fixedly connected with the boom 1, and the connecting piece is provided with a lifting hole.

[0021] Referring to Figs. 1-3 The lifting rope 2 and the vertical lifting assembly are each provided with two groups, one group of the lifting rope 2 is connected between one end of the boom 1 and one group of the vertical lifting assembly, and the other group of the lifting rope 2 is connected between the other end of the boom 1 and the other group of the vertical lifting assembly; each group of the vertical lifting assembly comprises a vertical guide rod 3, a lifting seat 4 and a lifting belt 5, the same group of the vertical guide rod 3 is provided with two, the lifting seat 4 is connected with the lifting rope 2, the lifting seat 4 is vertically slidably connected on the two vertical guide rods 3, and the two ends of the lifting belt 5 are fixedly connected on the lifting seat 4; according to actual needs, the lifting belt 5 can be detached from the lifting seat 4, the steam turbine rotor is first supported and then fixed on the lifting seat 4; in the lifting state, the two vertical guide rods 3 of the same group are respectively located on the two sides of the steam turbine rotor shaft.

[0022] Referring to Figs. 1-3, each of the vertical lifting assemblies further comprises a fixed pulley and a movable pulley 6, the fixed pulley comprises a first fixed pulley 7 and a second fixed pulley 8, the first fixed pulley 7 of the two vertical lifting assemblies is rotatably connected at the two ends of the lifting rod 1 respectively; the second fixed pulley 8 and the movable pulley 6 of the same vertical lifting assembly are both provided with two, the two second fixed pulleys 8 are rotatably connected at the top of the two vertical guide rods 3 respectively, and the two movable pulleys 6 are both horizontally rotatably connected on the lifting seat 4; in the plan view of the vertical lifting assembly, the first fixed pulley 7 is located between the two second fixed pulleys 8, and the two movable pulleys 6 are located between the two second fixed pulleys 8; both ends of the lifting rope 2 are fixedly connected on the lifting seat 4, the lifting rope 2 is wound above the fixed pulley, and the lifting rope 2 is wound below the movable pulley 6.

[0023] Further, the lengths of the two groups of lifting ropes 2 are the same, so that the two groups of vertical lifting assemblies can balance to lift the steam turbine rotor.

[0024] Further, the bottom of the vertical guide rod 3 is provided with a large-area support portion to support on the cylinder body with a large area to provide stability.

[0025] Referring to Figs. 2-3 , the lifting seat 4 is provided with a limiting portion 4-1 for providing limiting, so as to provide limiting when the lifting seat 4 moves to the upper limit of the vertical guide rod 3.

[0026] Further, the two second fixed pulleys 8 are symmetrically arranged about the two movable pulleys 6.

[0027] Referring to Figs. 1-3 , the working principle of the steam turbine rotor balanced lifting and lifting device is as follows:

[0028] The lifting and lifting device is moved to the top of the steam turbine rotor by the crane, the lifting belt is used to support the steam turbine rotor, and the vertical guide rod 3 is erected on the steam turbine cylinder, so that the two vertical guide rods 3 of the same group are symmetrically placed on the two sides of the steam turbine rotor shaft, and the lifting seat 4 is transversely arranged on the steam turbine rotor shaft at this time; the lifting rod 1 is lifted upward by the crane, the first fixed pulley 7 at the two ends of the lifting rod 1 simultaneously pulls the two groups of lifting ropes 2 upward, so that the two groups of vertical lifting assemblies can move synchronously and keep balance; wherein, since the movable pulley 6 is located between the first fixed pulley 7 and the second fixed pulley 8, when the lifting rope 2 is pulled upward, the movable pulley 6 will move upward, and the lifting seat 4 will slide upward along the vertical guide rod 3, so that the steam turbine rotor is lifted upward by the lifting belt, as shown in Fig. 3; Further, since the hoisting rope 2 is wound over the second fixed pulley 8, a part of the weight of the steam turbine rotor is equivalent to being pressed on the vertical guide rod 3, so that the vertical guide rod 3 can be stably erected on the steam turbine cylinder without the aid of other fixing tools, which is very ingenious; more importantly, during the lifting process, the vertical guide rod 3 provides vertical guidance for the lifting seat 4, so that the steam turbine rotor can be balanced and smoothly lifted, effectively preventing the steam turbine rotor from interfering or colliding with the cylinder. When the steam turbine rotor is away from the cylinder, the crane lifts the steam turbine rotor and the vertical lifting assembly at the same time, so as to transfer the steam turbine rotor.

[0029] The above is the preferred embodiment of the present application, but the embodiment of the present application is not limited by the above, any change, modification, replacement, combination, simplification made without departing from the spirit and principle of the present application shall be an equivalent replacement method, which is included in the protection scope of the present application.

Claims

1. A steam turbine rotor balancing lifting device, characterized in that, Includes booms, ropes, and vertical lifting components; The boom is arranged horizontally, and a suspension structure for connecting to the crane is provided in the middle of the boom; The hoisting rope and vertical lifting assembly are provided in two sets. One set of hoisting ropes is connected between one end of the boom and one set of vertical lifting assemblies, and the other set of hoisting ropes is connected between the other end of the boom and another set of vertical lifting assemblies. Each set of vertical lifting assemblies includes a vertical guide rod, a lifting seat, and a lifting strap. There are two vertical guide rods in the same set. The lifting seat is connected to the hoisting rope and is vertically slidably connected to the two vertical guide rods. The two ends of the lifting strap are fixedly connected to the lifting seat. In the lifting state, the two vertical guide rods in the same set are located on both sides of the steam turbine rotor shaft.

2. The steam turbine rotor balancing lifting device according to claim 1, characterized in that, Each set of vertical lifting components also includes fixed pulleys and movable pulleys. The fixed pulleys include a first fixed pulley and a second fixed pulley. The first fixed pulleys of the two sets of vertical lifting components are rotatably connected to both ends of the lifting rod. The same set of vertical lifting components has two second fixed pulleys and two movable pulleys. The two second fixed pulleys are rotatably connected to the top of the two vertical guide rods, and the two movable pulleys are rotatably connected to the lifting base horizontally.

3. The steam turbine rotor balancing lifting device according to claim 2, characterized in that, In the top-view projection of the vertical lifting assembly, the first fixed pulley is located between the two second fixed pulleys, and the two movable pulleys are located between the two second fixed pulleys; both ends of the lifting rope are fixedly connected to the lifting base, the lifting rope is wrapped around the top of the fixed pulley, and the lifting rope is wrapped around the bottom of the movable pulley.

4. The steam turbine rotor balancing lifting device according to claim 2, characterized in that, The two second fixed pulleys are symmetrically arranged about the two movable pulleys.

5. The steam turbine rotor balancing lifting device according to claim 1, characterized in that, The suspension structure includes a connector that is fixedly connected to the suspension rod, and the connector has a suspension hole.

6. The steam turbine rotor balancing lifting device according to claim 1, characterized in that, The two sets of suspension ropes are the same length.

7. The steam turbine rotor balancing lifting device according to claim 1, characterized in that, The bottom of the vertical guide rod is provided with a support section with a large area.

8. The steam turbine rotor balancing lifting device according to claim 1, characterized in that, The lifting base is provided with a limiting part for providing a limit.

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