Hoisting device and hoisting method for wheel disc of gas turbine

Abstract

The gas turbine wheel disc hoisting device is characterized in that the gas turbine wheel disc hoisting device comprises a chassis, a pull rod pin, a nut and an expansion head, the chassis is installed above a wheel disc of a gas turbine, the expansion head is located in a connecting hole of the wheel disc, the pull rod pin is inserted into the expansion head, and a pull rod threaded head of the pull rod pin penetrates through the connecting hole of the chassis; the pull rod threaded head is sleeved with a nut in a matched mode. Lifting of the wheel disc is achieved through friction force, safety and reliability are achieved, and the problem of wheel disc lifting without lifting point positions is perfectly solved.

Description

Technical Field

[0001] The present invention relates to an assembly method, in particular to a gas turbine assembly method. Background Art

[0002] As an important component of the gas turbine, the correct and fast installation of the impeller is particularly important during the assembly process of the gas turbine. As a rotor component, the impeller rotates at high speed when the gas turbine is running, and the safety of its structure directly affects the normal operation of the gas turbine unit. If threaded holes are processed on the impeller as lifting holes, stress will be generated, which will have a great impact on its structural safety. Due to its structure, there is no lifting position except the connection hole (bright hole). Summary of the invention

[0003] The object of the present invention is to provide a gas turbine wheel hoisting device and a hoisting method for hoisting a wheel without hoisting points.

[0004] The object of the present invention is achieved in that:

[0005] The present invention provides a gas turbine wheel hoisting device, which is characterized by comprising a chassis, a tie rod pin, a nut, and an expansion head. The chassis is installed above the wheel of the gas turbine, the expansion head is located in the connecting hole of the wheel, the tie rod pin is inserted into the expansion head, and the tie rod threaded head of the tie rod pin passes through the connecting hole of the chassis, the outside of the tie rod threaded head is matched with a nut, and a lifting ring is installed on the chassis.

[0006] The present invention provides a gas turbine wheel hoisting method, which is characterized by: using the gas turbine wheel hoisting device as described in claim 1, inserting the tie rod pin into the expansion head, and then installing them together in the connecting hole of the wheel, installing a chassis above the wheel, passing the tie rod threaded head of the tie rod pin through the connecting hole of the chassis, and pulling the tie rod pin upward by tightening the nut, so that the conical pin of the tie rod pin expands the petals of the expansion head outward, and the wheel is fixed by the friction between the petals of the expansion head and the inner wall of the connecting hole of the wheel, and then the wheel is hoisted by using the lifting ring on the chassis.

[0007] A gas turbine wheel disk hoisting method of the present invention may further include:

[0008] 1. The tightening torque for tightening the nut is 40±2N·m.

[0009] The advantages of the present invention are as follows: the present invention realizes the hoisting of the wheel disc by means of friction force, which is safe and reliable, and perfectly solves the problem of hoisting the wheel disc without hoisting points. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is an assembly diagram of the present invention;

[0011] Figure 2 It is a structural schematic diagram of the present invention;

[0012] Figure 3a The schematic diagram of the chassis structure is shown in Figure 1. Figure 3b is a side view of the chassis;

[0013] Figure 4 is a structural schematic diagram of a tie rod pin;

[0014] Figure 5 It is a structural diagram of the rising head;

[0015] Figure 6 It is a schematic diagram of the structure of the lifting ring. DETAILED DESCRIPTION

[0016] The present invention is described in more detail below with reference to the accompanying drawings:

[0017] Combination Figure 1-6 The present invention discloses a gas turbine wheel hoisting device, which comprises a chassis 1, a tie rod pin 2, a nut 3, a bulging head 4, a lifting ring 5 and other structures.

[0018] Insert the tie rod pin 2 into the expansion head 4, and then install them together into the connecting hole of the wheel disc. Do not pull the tie rod pin 2 upwards at this time. Install the chassis 1 above the wheel disc, pass the tie rod threaded head of the tie rod pin 2 through the connecting hole of the chassis 1, tighten the nut 3 with a tightening torque requirement of 40±2N·m, pull the tie rod pin 2 upwards, and the conical pin of the tie rod pin 2 will expand the petals of the expansion head 4 outwards. The wheel disc is fixed by the friction between the petals of the expansion head 4 and the inner wall of the connecting hole of the wheel disc, and then the lifting ring 5 on the chassis 1 is used to lift the wheel disc.

Claims

1. A gas turbine wheel hoisting device, characterized in that: Including chassis , tie rod pin, nut, and expansion head. A chassis is installed above the wheel disc of the gas turbine. The expansion head is located in the connecting hole of the wheel disc. The tie rod pin is inserted into the expansion head, and the tie rod threaded head of the tie rod pin passes through the connecting hole of the chassis. A nut is fitted on the outside of the tie rod threaded head, and a lifting ring is installed on the chassis.

2. A gas turbine wheel hoisting method, characterized in that: The gas turbine wheel hoisting device as described in claim 1 is used to insert the tie rod pin into the expansion head, and then install them together in the connecting hole of the wheel. The chassis is installed above the wheel, and the tie rod threaded head of the tie rod pin is passed through the connecting hole of the chassis. The tie rod pin is pulled upward by tightening the nut, and the conical pin of the tie rod pin expands the petals of the expansion head outward. The wheel is fixed by the friction between the petals of the expansion head and the inner wall of the connecting hole of the wheel, and then the wheel is hoisted by using the lifting ring on the chassis.

3. A gas turbine disk hoisting method according to claim 2, characterized in that: The tightening torque for tightening the nut is 40±2N·m.

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