Rotating shaft connecting structure of steam turbine

Abstract

The utility model discloses a rotating shaft connecting structure of a steam turbine, which comprises a rotating shaft and a driving machine part arranged at the rear end of the rotating shaft, a support frame is arranged on the driving machine part, a plurality of extending sections extending in the radial direction are arranged on the support frame, connecting rods are hinged to the extending sections, and the connecting rods are connected with the driving machine part. The other ends of the connecting rods are hinged to the same annular ring, the inner wall of the annular ring is a regular polygon, a rotating column is arranged in the annular ring, the outer wall of the rotating column is a regular polygon corresponding to the annular ring, and a coupler is arranged between the rotating column and the rear end of the rotating shaft. The utility model has the following advantages and effects: by arranging the connecting rod, on the premise of ensuring that the rotating shaft of the steam turbine stably drives a driver part, a certain displacement space is provided for the rotating shaft, so that the direct pressure of the displacement of the rotating shaft on the driver part in the traditional mode is avoided; and the service life of the rear-end driver part is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of steam turbines, in particular to a connecting structure of a rotating shaft of a steam turbine. Background Art

[0002] A steam turbine, also known as a steam turbine engine, is a rotary steam power device. High-temperature and high-pressure steam passes through a fixed nozzle to become an accelerated air flow and then jets onto the blades, causing the rotor equipped with the blade row to rotate and doing work externally at the same time. The steam turbine is the main equipment of modern thermal power plants and is also used in the metallurgical industry, chemical industry, and ship power plants. Compared with a reciprocating steam engine, the steam flow in a steam turbine is continuous and high-speed, and the flow rate that can pass through per unit area is large, so a relatively large power can be generated. High-power steam turbines can use higher steam pressures and temperatures, so the thermal efficiency is relatively high. Since the 19th century, the development of steam turbines has been to continuously increase the single-unit power and improve the thermal economy of the device on the basis of continuously improving safety and reliability, durability, and ensuring convenient operation.

[0003] For the steam turbines in the prior art, limited by multiple actual factors, the rotating shaft is prone to axial displacement. Therefore, when the rotating shaft is connected to the drive components at the rear end, it is easy to generate pressure on the drive components, resulting in a reduced service life of the drive components at the rear end. Content of the Utility Model

[0004] The purpose of the utility model is to provide a connecting structure of a rotating shaft of a steam turbine.

[0005] The above technical purpose of the utility model is achieved through the following technical solutions: A connecting structure of a rotating shaft of a steam turbine, including a rotating shaft and drive components arranged at the rear end of the rotating shaft. A support frame is arranged on the drive components, and a number of extension segments extending in the radial direction are arranged on the support frame. Connecting rods are hinged on the extension segments, and the other ends of the connecting rods are hinged to the same annular ring. The inner wall of the annular ring is a regular polygon, and a rotating column is arranged inside the annular ring. The outer wall of the rotating column is a regular polygon corresponding to the annular ring, and a coupling is arranged between the rotating column and the rear end of the rotating shaft.

[0006] It is further set as: A number of transverse grooves are arranged on the outer wall of the rotating column, and extension sliders corresponding to penetrate into the transverse grooves are arranged on the inner wall of the annular ring.

[0007] It is further set as: A polygonal groove is arranged at the end of the rotating column, and a polygonal column penetrating into the polygonal groove is arranged on the drive components. A gap is arranged between the bottom of the polygonal groove and the end of the polygonal column.

[0008] In summary, the utility model has the following beneficial effects: By providing the connecting rod, on the premise of ensuring the stable drive of the rotating shaft of the steam turbine to the drive components, a certain displacement space is given to the rotating shaft, avoiding the direct pressure on the drive components caused by the displacement of the rotating shaft in the traditional way, and ensuring the service life of the rear drive components. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a schematic diagram of the connecting structure of the rotating shaft of the steam turbine.

[0010] In the figure: 1, rotating shaft; 2, drive components; 3, support frame; 4, extension section; 5, connecting rod; 6, annular ring; 7, rotating column; 8, coupling; 9, transverse groove; 10, extension slider; 11, polygonal groove; 12, polygonal column; 13, gap. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0011] The following further describes the present utility model in detail with reference to the drawings.

[0012] The connecting structure of the rotating shaft 1 of the steam turbine includes a rotating shaft 1 and drive components 2 provided at the rear end of the rotating shaft 1.

[0013] A support frame 3 is provided on the drive components 2, and four extension sections 4 are provided on the support frame 3. The extension sections 4 extend in the radial direction and are in a cross shape. Connecting rods 5 are hinged on each of the extension sections 4, and one end of each connecting rod 5 is hinged to the same annular ring 6. The inner wall of the annular ring 6 is a regular hexagon.

[0014] A coupling 8 is provided on the rotating shaft 1, a rotating column 7 is provided at the other end of the coupling 8, the outer wall of the rotating column 7 is a regular hexagon, and the annular ring 6 is just sleeved on the rotating column 7.

[0015] When the rotating shaft 1 of the steam turbine is pushed, it can be automatically adjusted through the connecting rod 5, thereby avoiding affecting the drive components 2.

[0016] Among them, a transverse groove 9 is provided at the plane position of the regular hexagon on the outer wall of the rotating column 7, and an extension slider 10 corresponding to penetrate into the transverse groove 9 is provided on the inner wall of the annular ring 6. Lubricating oil can be injected into the transverse groove 9, and the sliding block can slide in the transverse groove 9.

[0017] Further, a polygonal groove 11 is provided at the end of the rotating column 7, and the polygonal groove 11 can be a rectangle, a pentagon or a hexagon. A polygonal column 12 penetrating into the polygonal groove 11 is provided on the drive components 2, and a gap 13 is provided between the bottom of the polygonal groove 11 and the end of the polygonal column 12. The gap 13 can also avoid the direct pressure on the drive components 2 caused by the displacement of the rotating shaft 1, and at the same time ensure the driving effect of the connecting shaft on the drive components 2.

[0018] This specific embodiment is only an interpretation of the present utility model and does not limit the present utility model. After reading this specification, those skilled in the art can make modifications to this embodiment that do not contribute creatively as needed, but as long as they are within the scope of the claims of the present utility model, they are protected by the patent law.

Claims

1. A rotating shaft connection structure of a steam turbine, comprising a rotating shaft and a driving machine component arranged at the rear end of the rotating shaft, characterized in that: The driving machine component is provided with a support frame, and a plurality of extension sections extending in the radial direction are provided on the support frame, and connecting rods are hinged on the extension sections, and the other end of the connecting rod is hinged with the same annular ring, and the inner wall of the annular ring is a regular polygon, and a rotating column is provided in the annular ring, and the outer wall of the rotating column is a regular polygon corresponding to the annular ring, and a coupling is provided between the rotating column and the rear end of the rotating shaft.

2. The rotating shaft connection structure of a steam turbine according to claim 1, characterized in that: The outer wall of the rotating column is provided with a plurality of transverse grooves, and the inner wall of the annular ring is provided with an extending sliding block corresponding to and penetrating into the transverse grooves.

3. The rotating shaft connection structure of a steam turbine according to claim 1, characterized in that: The end of the rotating column is provided with a polygonal groove, the driving machine component is provided with a polygonal column penetrating into the polygonal groove, and a gap is provided between the bottom of the polygonal groove and the end of the polygonal column.

Images