Rotor locking structure of gas turbine

Abstract

The invention discloses a gas turbine rotor locking structure. The nut is usually installed in a cylindrical rotor of a gas compressor, is deep in position and is not easy to install and detach. The turbine rotor shaft locking device comprises a locking nut module and a turbine rotor shaft module, wherein the locking nut module is in threaded connection with the turbine rotor shaft module; the locking nut module comprises a nut, a locking cylinder, a spring, a baffle ring and a clamping ring, the locking cylinder is connected with the nut through a spline, the locking cylinder is sleeved with the spring, and the locking cylinder is sleeved with the baffle ring and fixed through the clamping ring; threads used for being connected with a tool are formed in the stop cylinder. The locking device is applied to locking of the gas turbine rotor.

Description

Technical Field

[0001] The invention relates to a gas turbine rotor locking structure. Background Art

[0002] Gas turbine rotors are usually divided into compressor rotors and turbine rotors. The turbine rotor has a long cylindrical shaft and is connected to the compressor rotor with nuts. Gas turbine rotors usually rotate at high speeds and have huge vibration loads and centrifugal loads. In order to ensure the reliable connection between the compressor rotor and the turbine rotor, the connecting nuts are usually locked. The nuts are usually installed inside the compressor cylindrical rotor, deep in the position, and are not easy to install and remove.

[0003] In order to prevent the nut from loosening and disengaging under huge loads, which may cause catastrophic accidents, a nut design that is firmly and effectively locked, easy to install and easy to disassemble is very important for gas turbine rotors. Summary of the invention

[0004] The purpose of the present invention is to solve the above-mentioned problems and thus provide a gas turbine rotor locking structure.

[0005] The above purpose is achieved through the following technical solutions: A gas turbine rotor locking structure, comprising: a locking nut module and a turbine rotor shaft module, wherein the locking nut module and the turbine rotor shaft module are connected by threads; The locking nut module comprises a nut, a stopper cylinder, a spring, a retaining ring and a snap ring, wherein the stopper cylinder is connected to the nut via a spline, the spring is sleeved on the stopper cylinder, and the retaining ring is sleeved on the stopper cylinder and fixed via a snap ring; The interior of the stop cylinder is provided with a thread for connecting with a tool.

[0006] The gas turbine rotor locking structure, the turbine rotor shaft module includes a turbine rotor shaft and a bushing, and the transparent rotor shaft is connected to the bushing via a pin.

[0007] In the gas turbine rotor locking structure, the stop cylinder and the bushing are connected via a spline connecting the stop cylinder and the bushing.

[0008] In the gas turbine rotor locking structure, the end surface of the nut is provided with a slot for tightening. Beneficial Effects

[0009] 1. The entire locking nut module of the present invention is composed of 5 parts, with a small number of parts, simple and reliable, ensuring the safe, reliable and effective connection of the gas turbine rotor.

[0010] 2. The nut of the present invention can be disassembled in a non-destructive manner, can be reused, and is very convenient to install and disassemble.

[0011] 3. The small parts of the locking nut module of the present invention are all contained in the nut, so that they will not be disengaged due to centrifugal force or the like. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the structure of the present invention; Figure 2 It is a partial enlarged view of the present invention; Figure 3 It is one of the schematic diagrams of the installation process of the present invention; Figure 4 This is the second schematic diagram of the installation process of the present invention; Figure 5 This is the third schematic diagram of the installation process of the present invention; Figure 6 This is the fourth schematic diagram of the installation process of the present invention; In the figure: 1. compressor rotor rear journal; 2. turbine rotor shaft; 3. nut; 4. bushing; 5. pin; 6. stop cylinder; 7. spring; 8. retaining ring; 9. snap ring; 10. locking nut module; 20 turbine rotor shaft module; 101. spline connecting the rotor; 201. thread connecting the turbine rotor shaft and the nut; 202. spline connecting the stop cylinder and the bushing; 203. spline connecting the stop cylinder and the nut; 204. thread on the stop cylinder for connecting to the tool; 205. slot. DETAILED DESCRIPTION

[0013] Reference Figure 1-Figure 2 , a gas turbine rotor locking structure, comprising: a locking nut module 10 and a turbine rotor shaft module 20, wherein the locking nut module and the turbine rotor shaft module are connected via a thread 201 connecting the turbine rotor shaft and the nut; The locking nut module comprises a nut 3, a stopper cylinder 6, a spring 7, a retaining ring 8 and a snap ring 9. The stopper cylinder and the nut are connected via a spline 203 connecting the stopper cylinder and the nut. The spring is sleeved on the stopper cylinder, and the retaining ring is sleeved on the stopper cylinder and fixed via the snap ring. The retaining cylinder is provided with a thread 204 for connecting with a tool.

[0014] The turbine rotor shaft module comprises a turbine rotor shaft 2 and a bushing 4 , and the transparent rotor shaft is connected to the bushing via a pin 5 .

[0015] The stop cylinder and the bushing are connected via a spline 202 connecting the stop cylinder and the bushing.

[0016] The end surface of the nut is provided with a slot 205 for tightening.

[0017] Working principle: Install the stop cylinder component 6 in the nut component 3, and then install the spring component 7, the retaining ring component 8, and the clamping ring component 9 to form an independent locking nut module component 10.

[0018] The bushing member 4 is installed in the rotor member 2 and fixed with the pin member 5 to form a turbine rotor shaft module member 20.

[0019] When installing the rotor, first pass the turbine rotor shaft module component 20 through the low-pressure rotor component 1 and fix it with the spline 101.

[0020] When installing the nut, first connect the nut module 10 to the member 20 through the thread 201, and screw it until the stop cylinder member 6 and the liner member 4 are about to contact (see Figure 4 ). Use a tool to connect the thread 204 on the stopper cylinder member 6, and compress the spring member 7 at the same time, so that the stopper cylinder is completely retracted into the nut member 10 (see Figure 5 ), to prevent the stopper sleeve 6 from locking with the spline 202 of the liner sleeve 4. At this time, tighten the nut to fix the compressor rotor and the turbine rotor shaft (see Figure 6 ). Remove the tool connecting the stopper sleeve 6, restore the spring member 6 to its original length, and push the stopper sleeve 6 to fix the spline of the liner member 4 (see Figure 1 ).

[0021] When disassembling, first connect the stop cylinder with a tool, compress the spring, and disengage the stop cylinder from the bushing to unlock the nut.

[0022] Alternative solution: The bushing of part 4 and the pin of part 5 which are installed in conjunction with it can be eliminated, and the spline 202 on the retaining ring can be directly machined on the rotor 2.

Claims

1. A gas turbine rotor locking structure, characterized in that: The components include: a locking nut module and a turbine rotor shaft module, wherein the locking nut module is connected to the turbine rotor shaft module through threads; The locking nut module comprises a nut, a stopper cylinder, a spring, a retaining ring and a snap ring, wherein the stopper cylinder is connected to the nut via a spline, the spring is sleeved on the stopper cylinder, and the retaining ring is sleeved on the stopper cylinder and fixed via a snap ring; The interior of the stop cylinder is provided with a thread for connecting with a tool.

2. A gas turbine rotor locking structure according to claim 1, characterized in that: The turbine rotor shaft module comprises a turbine rotor shaft and a bushing, and the transparent rotor shaft is connected to the bushing via a pin.

3. A gas turbine rotor locking structure according to claim 2, characterized in that: The stop cylinder and the bushing are connected via a spline connecting the stop cylinder and the bushing.

4. A gas turbine rotor locking structure according to claim 3, characterized in that: The end surface of the nut is provided with a slot for tightening.

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