A fixture and method for simulating the operating conditions of a turbine rotor

Abstract

The present application discloses a kind of clamps of turbine rotor simulating its working condition, including top pin in turbine disk mortise vent hole, force component connected with top pin, and support component for installing force component;Middle part of force component is movably connected with support component.The present application also discloses a kind of method of turbine rotor simulating its working condition, comprising the following steps: S1.determine simulation aeroengine working principle, i.e. blade is lifted, and makes blade tenon and disk mortise top tightly without gap;S2.top pin is installed in turbine disk mortise vent hole;S3.utilize screw drive principle, by tightening nut, the rotary motion of nut is converted into the linear motion of pressing hook, and then force is applied to top pin, and the gap between turbine blade tenon and disk mortise is eliminated, and the working condition of turbine rotor is simulated.The present application is simple in operation, easy to realize, can better simulate aeroengine working condition, and can better control the gap between turbine rotor and casing.

Description

Technical Field

[0001] This invention belongs to the field of aero-engine manufacturing technology, specifically relating to a fixture and method for simulating the working state of a turbine rotor. Background Technology

[0002] As a core component of the engine, the high-pressure turbine rotor has extremely high clearance requirements between itself and the corresponding casing during operation. If the clearance is too large, it will lead to engine combustion leakage and reduce engine efficiency. If the clearance is too small, the high-speed rotating turbine rotor will rub against the casing. Therefore, controlling the clearance between the turbine rotor and the casing is particularly important.

[0003] There is a significant difference between the engine manufacturing process and the final operating state. When the engine rotor is in operation, it rotates at high speed and the blades are subjected to a great centrifugal force, which causes the outer diameter of the rotor to be larger than the outer diameter in the free state during manufacturing. This makes it difficult to control the gap between the high-vortex rotor blade tip and the casing.

[0004] The high-pressure turbine rotor consists of high-pressure turbine disk, high-pressure turbine blades, and open retaining rings. The only usable space to lift the blades is the vent hole inside the turbine disk tenon. The vent hole is only 5mm in diameter, which is too small. To lift the blades, a radial force needs to be applied to the blades, but the 5mm space is not enough to accommodate a mechanism that can generate a radial force. Summary of the Invention

[0005] To address the aforementioned problems, this invention aims to provide a fixture and method for simulating the working state of a turbine rotor, thereby resolving the issue in the prior art that makes it difficult to control the clearance between the blade tip and the casing of a high-vortex rotor.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A fixture for simulating the working state of a turbine rotor includes a top pin disposed in a vent hole in a turbine disk tenon groove, a force-applying component connected to the top pin, and a support component for mounting the force-applying component; the middle part of the force-applying component is movably connected to the support component.

[0008] The force-applying components include a pressure hook connected to the top pin and a nut connected to the pressure hook; the top pin and the pressure hook are set in a one-to-one correspondence.

[0009] One end of the pressure hook is provided with a hook that connects to the top pin, and the other end is provided with a thread that connects to the nut.

[0010] The nut has four holes symmetrically arranged in a cross shape.

[0011] The support component is set as a positioning ring, and the pressure hook passes through the positioning ring and connects to the top pin.

[0012] The nut is in contact with the side wall of the positioning ring, and a washer is provided between the nut and the positioning ring.

[0013] The locating ring is mounted on the turbine disk.

[0014] A method for simulating the operating state of a turbine rotor includes the following steps:

[0015] S1. Determine the working principle of the simulated aero-engine, that is, lift the blade so that the blade tenon and the disc tenon are tightly fitted without gap;

[0016] S2. A top pin is used to install the turbine disk tenon groove in the vent hole;

[0017] S3. Utilizing the principle of threaded transmission, by tightening the nut, the rotational motion of the nut is converted into the linear motion of the hook, which in turn applies force to the top pin and transmits the force to the turbine blade tenon, causing the blade to lift up and simulating the working state of the turbine rotor.

[0018] Compared with the prior art, the present invention has the following advantages:

[0019] The present invention discloses a fixture and method for simulating the working state of a turbine rotor. By utilizing the principle of threaded transmission, the rotational motion of the nut is converted into the linear motion of the pressure hook. The pressure hook transmits the force to the top pin, thereby further transmitting the force to the turbine blades, achieving the purpose of lifting the blades to simulate their working state.

[0020] This invention is simple to operate, easy to implement, and can better simulate the working state of an aero-engine. The blade tip outer diameter is machined in the jacked-up state, and the resulting rotor outer diameter is close to the outer diameter of the engine rotor in the working state, providing a reference for better control of the gap between the turbine rotor and the casing. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the specific embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a partial structural schematic diagram of the turbine rotor simulation working state fixture in this invention;

[0023] Figure 2 This is a simplified diagram of the positioning ring structure in this invention;

[0024] Figure 3 for Figure 2 Sectional view at point DD;

[0025] Figure 4 for Figure 2 Sectional view at CC;

[0026] Figure 5 This is a schematic diagram of the pressure hook structure in this invention;

[0027] Figure 6 This is a schematic diagram of the nut structure in this invention;

[0028] Attached reference numerals: 1-top pin, 2-pressure hook, 3-nut, 4-locating ring, 5-washer. Detailed Implementation

[0029] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. However, it should not be construed that the scope of the subject matter of the present invention is limited to the following embodiments. All modifications, substitutions and alterations made based on ordinary technical knowledge and common practices in the art without departing from the above-described technical concept of the present invention are included within the scope of the present invention.

[0030] Reference Figures 1 to 6 The present invention provides a fixture for simulating the working state of a turbine rotor, comprising a top pin 1 disposed in the ventilation hole of the turbine disk tenon groove, a force-applying component connected to the top pin 1, and a support component for mounting the force-applying component; the middle part of the force-applying component is movably connected to the support component.

[0031] Specifically, the top pin 1 is installed at an angle in the ventilation hole of the turbine disk tenon. The top pin 1 plays the role of transmitting motion and force. One end of the top pin 1 contacts the bottom of the turbine blade tenon. As long as a force along the axial direction of the top pin 1 is applied to the other end of the top pin 1, the force can be transmitted to the turbine blade tenon, thereby subjecting the blade to a radial lifting force.

[0032] Each blade corresponds to a tenon, and each tenon requires a top pin 1. The number of top pins 1 corresponds one-to-one with the number of tenons. For example, if the entire turbine rotor has 84 tenons, then the entire turbine rotor requires 84 sets of top pins 1. During operation, axial force needs to be evenly applied to the 84 top pins 1 through the force-applying components.

[0033] The force-applying components include a pressure hook 2 connected to the top pin 1 and a nut 3 connected to the pressure hook 2; the top pin 1 and the pressure hook 2 are arranged in a one-to-one correspondence. One end of the pressure hook 2 is provided with a hook connected to the top pin 1, and the other end is provided with a thread connected to the nut 3. In this embodiment, the angle of the hook is 114°36′, which ensures that the pressure hook 2 and the top pin 1 are perpendicular, so as to transmit the motion and force to the top pin 1 with maximum efficiency.

[0034] The nut 3 has four holes symmetrically arranged in a cross shape. The structure of the nut 3 facilitates operation in limited space. By tightening the nut 3, the rotational motion of the nut 3 is converted into the linear motion of the pressure hook 2. The force and motion are then transmitted to the top pin 1 through the hook of the pressure hook 2, and then to the turbine blade tenon, so as to lift the blade and realize the effect of simulating the working state of the turbine rotor.

[0035] The supporting component is a positioning ring 4, and the pressure hook 2 passes through the positioning ring 4 and connects to the top pin 1. The positioning ring 4 is installed on the turbine disk. When there are 84 top pins 1, there are 84 corresponding pressure hooks 2, and the 84 pressure hooks 2 are evenly installed on the positioning ring 4.

[0036] Nut 3 is in contact with the side wall of positioning ring 4, and a washer 5 is provided between nut 3 and positioning ring 4.

[0037] The present invention provides a method for simulating the working state of a turbine rotor, which essentially involves lifting the blades to simulate the condition where the blades are thrown apart by centrifugal force during the operation of an engine turbine rotor. The method includes the following steps:

[0038] S1. Determine the working principle of the simulated aero-engine, that is, lift the blade so that the blade tenon and the disc tenon are tightly fitted without gap;

[0039] S2. The top pin 1 is installed in the vent hole of the turbine disk tenon groove;

[0040] S3. Utilizing the principle of threaded transmission, tightening the nut converts its rotational motion into the linear motion of the hook 2, which in turn applies force to the top pin 1. This force is then transmitted to the turbine blade tenon, lifting the blade and simulating the turbine rotor's working state. Specifically, by tightening nut 3, the rotational motion of nut 3 is converted into the linear motion of hook 2 within the positioning ring. The force and motion are transmitted through the hook 2 to the top pin 1, and then to the turbine blade tenon, achieving the purpose of lifting the blade and thus simulating the turbine rotor's working state.

[0041] The foregoing has provided a detailed description of the fixture and method for simulating the working state of a turbine rotor, as provided by this invention. Specific examples have been used to illustrate the structure and working principle of this invention. The descriptions of the embodiments above are merely for the purpose of helping to understand the method and core ideas of this invention. It should be noted that those skilled in the art can make various improvements and modifications to this invention without departing from its principles, and these improvements and modifications also fall within the scope of protection of the claims of this invention.

Claims

1. A fixture for simulating the working state of a turbine rotor, characterized in that: It includes a top pin (1) located in the vent hole of the turbine disk tenon groove, a force-applying component connected to the top pin (1), and a support component for installing the force-applying component; the middle part of the force-applying component is movably connected to the support component. The force-applying components include a pressure hook (2) connected to the top pin (1) and a nut (3) connected to the pressure hook (2); the top pin (1) and the pressure hook (2) are provided in a one-to-one correspondence; One end of the pressure hook (2) is provided with a hook that connects to the top pin (1), and the other end is provided with a thread that connects to the nut (3); The support component is configured as a positioning ring (4), and the pressure hook (2) passes through the positioning ring (4) and connects to the top pin (1).

2. The fixture for simulating the working state of a turbine rotor according to claim 1, characterized in that: The nut (3) has four holes symmetrically arranged in a cross shape.

3. The fixture for simulating the working state of a turbine rotor according to claim 1, characterized in that: The nut (3) is in contact with the side wall of the positioning ring (4), and a washer (5) is provided between the nut (3) and the positioning ring (4).

4. The fixture for simulating the working state of a turbine rotor according to claim 1, characterized in that: The positioning ring (4) is installed on the turbine disk.

5. A method of using a fixture for simulating the working state of a turbine rotor as described in claim 1, characterized in that: Includes the following steps: S1. Determine the working principle of the simulated aero-engine, that is, lift the blade so that the blade tenon and the disc tenon are tightly fitted without gap; S2. A top pin (1) is used to install the turbine disk tenon groove in the vent hole; S3. By using the principle of thread transmission, the rotational motion of the nut (3) is converted into the linear motion of the hook (2) by tightening the nut (3), and then the force is applied to the top pin (1), and the force is transmitted to the turbine blade tenon. The blade is lifted up, and the turbine rotor simulates its working state.

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