Hollow partition plate of steam turbine

Abstract

The utility model belongs to the technical field of steam turbines, and particularly discloses a steam turbine hollow partition plate which comprises a partition plate body, reinforcing ribs are arranged in the partition plate body, a threaded sleeve is fixedly connected to the bottom of the partition plate body, a rotor is movably installed below the threaded sleeve through a noise reduction mechanism, and a damping mechanism is arranged at the top of the rotor. The bottom of the partition plate body is in threaded sleeve connection with a rotary table, and the noise reduction mechanism comprises a threaded head in threaded sleeve connection with the inner surface of a threaded sleeve. According to the hollow partition plate of the steam turbine, vibration generated by rotor movement can be effectively absorbed and relieved through the damping mechanism, transmission of vibration in a whole system can be reduced, adverse effects of vibration on the hollow partition plate and other components are prevented, and the service life of the hollow partition plate is prolonged by reducing vibration transmission. And the probability of fatigue and damage to connecting parts and nearby structures can be obviously reduced, so that the stability of the whole system is maintained.

Description

Technical Field

[0001] The present application relates to the technical field of steam turbines, and in particular to a hollow baffle of a steam turbine. Background Art

[0002] The hollow diaphragm of a steam turbine is a circular plate-shaped component installed in the steam turbine cylinder and divides the cylinder into several chambers with different pressures. Its main function is to install nozzles or stationary blades and prevent inter-stage steam leakage.

[0003] The hollow diaphragm of the steam turbine is usually directly connected to the rotor by bolts. This rigid connection method is relatively strong, but it also has obvious defects. That is, the rigid connection is easy to transmit vibration and noise. In a high-speed rotating steam turbine, the vibration will be transmitted to the entire system, which may cause performance degradation and fatigue damage. Utility Model Content

[0004] In view of this, the purpose of the utility model is to solve the shortcomings existing in the background technology and to propose a hollow diaphragm of a steam turbine to solve the problems existing in the prior art.

[0005] To achieve the above purpose, the utility model provides a hollow baffle of a steam turbine, including a baffle body, the interior of the baffle body is provided with reinforcing ribs, the bottom of the baffle body is fixedly connected with a screw sleeve, a rotor is movably installed below the screw sleeve through a noise reduction mechanism, a shock absorbing mechanism is provided on the top of the rotor, and a turntable is threadedly sleeved on the bottom of the baffle body.

[0006] Preferably, the noise reduction mechanism includes a threaded head threadedly sleeved on the inner surface of the sleeve, a connecting rod is fixedly connected to the bottom of the threaded head, and a longitudinal spring is movably sleeved on the outer surface of the connecting rod. The noise reduction mechanism can reduce the noise generated by the rotor and the hollow partition during operation.

[0007] Preferably, a silencer is slidably connected to the outer surface of the connecting rod, the bottom of the silencer is fixedly connected to the top of the rotor, and silencer cotton is arranged inside the silencer.

[0008] Preferably, the damping mechanism comprises a sliding shaft fixedly connected to the outer surface of the rotor, and a transverse spring is movably sleeved on the outer surface of the sliding shaft. The damping mechanism can effectively absorb and mitigate the vibration caused by the movement of the rotor, which helps to reduce the transmission of the vibration in the entire system and reduce the adverse effects of the vibration on the hollow partition and other components.

[0009] Preferably, the outer surface of the sliding shaft is provided with a sliding sleeve, and the sliding sleeve is provided in two groups.

[0010] Preferably, the outer surface of the sliding sleeve is rotatably connected to a rocker rod, and the top of the rocker rod is rotatably connected to the bottom of the turntable.

[0011] Compared with the prior art, the utility model has the following beneficial effects:

[0012] 1. The hollow diaphragm of the steam turbine can effectively absorb and mitigate the vibration caused by the movement of the rotor through the shock absorbing mechanism, which helps to reduce the transmission of vibration in the entire system and prevent the vibration from having an adverse effect on the hollow diaphragm and other components. By reducing the transmission of vibration, the probability of fatigue and damage to the connecting parts and nearby structures will be significantly reduced, thereby maintaining the stability of the entire system.

[0013] 2. The hollow diaphragm of the steam turbine is provided with a noise reduction mechanism at the connection between the hollow diaphragm and the rotor, which can effectively reduce the degree of noise caused by the movement of the rotor being transmitted to the surrounding environment, so as to reduce the noise level, reduce the burden on the operator's ears and improve the comfort of the working environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the overall structure of this application;

[0015] Figure 2 This is a schematic diagram of the connecting rod surface structure of this application;

[0016] Figure 3 This is a schematic diagram of the internal structure of the silencer of this application.

[0017] Among them: 1. partition body; 2. reinforcing ribs; 3. screw sleeve; 4. threaded head; 5. connecting rod; 6. longitudinal spring; 7. silencer; 8. silencer cotton; 9. rotor; 10. sliding shaft; 11. transverse spring; 12. sliding sleeve; 13. rocker arm; 14. turntable. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0019] See also Figure 1-3 A hollow baffle of a steam turbine comprises a baffle body 1, a reinforcing rib 2 is arranged inside the baffle body 1, a screw sleeve 3 is fixedly connected to the bottom of the baffle body 1, a rotor 9 is movably installed below the screw sleeve 3 through a noise reduction mechanism, a shock absorbing mechanism is arranged on the top of the rotor 9, and a turntable 14 is threadedly sleeved on the bottom of the baffle body 1.

[0020] Through the above technical solution, the hollow partition is connected to the rotor 9 through the noise reduction mechanism and the shock absorbing mechanism during use. The shock absorbing mechanism and the noise reduction mechanism can effectively absorb and mitigate the vibration generated by the movement of the rotor 9, reduce the transmission of vibration to the partition body 1, and help maintain the stability of the entire system.

[0021] Specifically, the noise reduction mechanism includes a threaded head 4 threadedly sleeved on the inner surface of the threaded sleeve 3, a connecting rod 5 is fixedly connected to the bottom of the threaded head 4, and a longitudinal spring 6 is movably sleeved on the outer surface of the connecting rod 5.

[0022] Through the above technical solution, the threaded head 4 can be rotatably connected to the threaded sleeve 3, and the matching turntable 14 is threadedly connected to the bottom of the partition body 1, so that the hollow partition is connected to the rotor 9.

[0023] Specifically, the outer surface of the connecting rod 5 is slidably connected with a silencer 7 , the bottom of the silencer 7 is fixedly connected to the top of the rotor 9 , and silencer cotton 8 is arranged inside the silencer 7 .

[0024] Through the above technical solution, the silencer cotton 8 can effectively reduce the noise transmission generated during the friction between components.

[0025] Specifically, the shock absorbing mechanism includes a sliding shaft 10 fixedly connected to the outer surface of the rotor 9 , and a transverse spring 11 is movably sleeved on the outer surface of the sliding shaft 10 .

[0026] Through the above technical solution, the transverse spring 11 can dampen and buffer the transmitted vibration after being squeezed.

[0027] Specifically, the outer surface of the sliding shaft 10 is provided with sliding sleeves 12 , and there are two groups of sliding sleeves 12 .

[0028] Through the above technical solution, the sliding sleeve 12 will squeeze and deform the transverse spring 11 during the sliding process along the sliding shaft 10, thereby relieving the vibration impact force.

[0029] Specifically, the outer surface of the sliding sleeve 12 is rotatably connected with a swing rod 13 , and the top of the swing rod 13 is rotatably connected to the bottom of the turntable 14 .

[0030] Through the above technical solution, the rotating turntable 14 can be screwed out from the bottom of the partition body 1, and the hollow partition can be removed by loosening the connection between the screw sleeve 3 and the threaded head 4.

[0031] Working principle: During the use of the device, a reinforcing rib 2 is provided inside the hollow partition to increase the strength of the hollow partition. The threaded head 4 is screwed into the screw sleeve 3 at the bottom of the partition body 1, and the turntable 14 is rotated into the bottom of the partition body 1 to connect the partition body 1 with the rotor 9. When disassembling, it is only necessary to undo the connection between the threaded head 4 and the screw sleeve 3 and screw out the turntable 14 to remove the hollow partition from the rotor 9. During the operation of the steam turbine, a large vibration will be generated in the system. Under the action of the vibration, the partition body 1 will slightly approach the rotor 9. During this process, the longitudinal spring 6 will be compressed to form a reverse The buffering force can relieve the vibration. At the same time, the noise transmitted through the connecting rod 5 will be reduced to a certain extent at the silencer cotton 8 inside the silencer 7. At the same time, the angle between the two sets of rocker arms 13 will increase, pushing the sliding sleeve 12 to slide along the sliding shaft 10 and compressing the transverse spring 11, thereby further buffering and reducing the vibration, helping to reduce the transmission of vibration in the entire system, reducing the adverse effects of vibration on the hollow partition and other components, and by reducing vibration transmission, it can reduce fatigue and stress caused by vibration, helping to extend the service life of connecting components and nearby structures, and maintain the stability of the entire system.

[0032] Although the embodiments of the present application have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present application, and that the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A steam turbine hollow diaphragm, comprising a diaphragm body (1), characterized in that: The interior of the partition body (1) is provided with reinforcing ribs (2); the bottom of the partition body (1) is fixedly connected with a screw sleeve (3); a rotor (9) is movably mounted below the screw sleeve (3) via a noise reduction mechanism; a shock absorbing mechanism is provided on the top of the rotor (9); and a turntable (14) is threadedly sleeved on the bottom of the partition body (1).

2. A steam turbine hollow diaphragm according to claim 1, characterized in that: The noise reduction mechanism comprises a threaded head (4) threadedly sleeved on the inner surface of a screw sleeve (3); a connecting rod (5) is fixedly connected to the bottom of the threaded head (4); and a longitudinal spring (6) is movably sleeved on the outer surface of the connecting rod (5).

3. A steam turbine hollow diaphragm according to claim 2, characterized in that: The outer surface of the connecting rod (5) is slidably connected to a silencer (7), the bottom of the silencer (7) is fixedly connected to the top of the rotor (9), and silencer cotton (8) is arranged inside the silencer (7).

4. A steam turbine hollow diaphragm according to claim 1, characterized in that: The shock absorbing mechanism comprises a sliding shaft (10) fixedly connected to the outer surface of the rotor (9), and a transverse spring (11) is movably sleeved on the outer surface of the sliding shaft (10).

5. A steam turbine hollow diaphragm according to claim 4, characterized in that: The outer surface sliding sleeve of the sliding shaft (10) is provided with a sliding sleeve (12), and the sliding sleeve (12) is provided in two groups.

6. A steam turbine hollow diaphragm according to claim 5, characterized in that: The outer surface of the sliding sleeve (12) is rotatably connected to a swing rod (13), and the top of the swing rod (13) is rotatably connected to the bottom of the turntable (14).

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