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CN-224214231-U - Turbine blade structure

CN224214231UCN 224214231 UCN224214231 UCN 224214231UCN-224214231-U

Abstract

The utility model provides a turbine blade structure, which belongs to the field of turbine blades and comprises a shell, a steam pipe and a blade shaft, wherein the steam pipe is fixedly connected with the shell, the blade shaft is arranged on the inner side of the shell, a plurality of fixing seats are sleeved on the blade shaft, a plurality of moving blades are fixedly connected onto the fixing seats, a plurality of blade groups are fixedly connected onto the inner side wall of the shell, each blade group comprises a plurality of stationary blades, an air injection seat is fixedly connected onto the middle position of the length direction of the blade shaft, fixing sleeves are respectively arranged on two sides of each air injection seat, the fixing sleeves are rotationally connected with the blade shaft, an air pipe is fixedly connected onto the fixing sleeves, and the air pipe is connected with an external ejector.

Inventors

  • ZHAO HUIJUN
  • PENG HUAN
  • FU CHANGSHENG

Assignees

  • 安徽英毅热电有限公司

Dates

Publication Date
20260508
Application Date
20250715

Claims (7)

  1. 1. The utility model provides a turbine blade structure, includes casing (1), steam pipe (2) and blade axle (3), its characterized in that, the both sides of casing (1) are the symmetry setting, the both sides of casing (1) all are the toper mouth setting, steam pipe (2) and casing (1) fixed connection, blade axle (3) set up in the inboard of casing (1), the cover is equipped with a plurality of fixing base (4) on blade axle (3), fixedly connected with a plurality of moving blades (5) on fixing base (4), the inside wall fixedly connected with of casing (1) a plurality of blade groups, the blade group contains a plurality of stationary blade (6), the intermediate position fixedly connected with jet-propelled seat (13) of blade axle (3) length direction, the both sides of jet-propelled seat (13) all are provided with fixed cover (11), fixed cover (11) are connected with blade axle (3) rotation, fixedly connected with trachea (12) on fixed cover (11), trachea (12) are connected with outside sprayer, be provided with a plurality of air inlet channel (32) on blade axle (3), a plurality of air inlet channel (32).
  2. 2. The turbine blade structure according to claim 1, wherein the steam pipe (2) is communicated with the casing (1), the fixing seat (4) is fixedly connected with the blade shaft (3), and the moving blades (5) are uniformly distributed on the circumference of the outer side wall of the fixing seat (4).
  3. 3. The turbine blade structure according to claim 1, wherein the stator blades (6) and the rotor blades (5) are disposed obliquely on the blade shaft (3), one side pitch of adjacent stator blades (6) in a single group of blades is larger than the other side pitch, and one side with larger pitch to one side with smaller pitch are the direction of steam flow.
  4. 4. The turbine blade structure of claim 1, wherein the plurality of stationary blades (6) in the blade set are uniformly distributed circumferentially on the inner side wall of the casing (1), and the fixing base (4) and the blade set are distributed in a staggered manner in the direction of the blade shaft (3).
  5. 5. The turbine blade structure according to claim 1, wherein the air pipe (12) is provided with a first air inlet channel (121), and the air injection seat (13) is provided with a plurality of air outlet holes (131).
  6. 6. A turbine blade structure according to claim 5, characterized in that the air inlet groove (31) is located at the inner side of the fixed sleeve (11), the air outlet groove (33) is located at the inner side of the air outlet hole (131), the second air inlet channel (32) is located at the inner side of the blade shaft (3), and the air inlet groove (31) and the air outlet groove (33) are communicated through the second air inlet channel (32).
  7. 7. The turbine blade structure as claimed in claim 6, wherein the air outlet groove (33) is disposed in communication with a plurality of air outlet holes (131), and the first air inlet channel (121) is disposed in communication with the air inlet groove (31).

Description

Turbine blade structure Technical Field The utility model relates to the field of turbine blades, in particular to a turbine blade structure. Background The steam turbine is a high-speed rotary power machine for converting heat energy into mechanical energy, and is widely applied to the fields of thermal power generation, nuclear power plants and large industrial driving. The core principle is that the high-temperature high-pressure steam impacts the blades to drive the rotor to rotate, so as to drive the generator or mechanical equipment to work. The steam turbine is generally formed by connecting a plurality of stages of cylinders such as a high-pressure cylinder, a medium-pressure cylinder, a low-pressure cylinder and the like in series, and the steam does work step by step in the expansion process, so that the efficiency can reach more than forty percent. Modern steam turbines use precision casting blade, steam reheating and backheating cycle techniques, and the like, so that the energy utilization rate is remarkably improved. The surface of the blade of the steam turbine is subjected to high-speed impact of high-temperature high-pressure steam for a long time in the running process, and is easy to damage. When steam passes through the blade flow channel at an extremely high flow rate, the front edge and the pressure surface of the blade can bear strong dynamic load and alternating stress, so that erosion abrasion and microcracking appear on the surface of the material gradually, and the service life of the blade is reduced. How to design a turbine blade structure to improve these problems is a urgent problem for those skilled in the art. Disclosure of utility model In order to remedy the above-mentioned shortcomings, the present utility model provides a turbine blade structure aimed at improving the problems mentioned in the background above. The utility model is realized in the following way: The utility model provides a turbine blade structure, which comprises a shell, steam pipes and a blade shaft, wherein two sides of the shell are symmetrically arranged, two sides of the shell are respectively provided with a conical opening, the steam pipes are fixedly connected with the shell, the blade shaft is arranged on the inner side of the shell, a plurality of fixing seats are sleeved on the blade shaft, a plurality of moving blades are fixedly connected onto the fixing seats, a plurality of blade groups are fixedly connected onto the inner side wall of the shell, each blade group comprises a plurality of stationary blades, an air injection seat is fixedly connected onto the middle position of the length direction of the blade shaft, two sides of each air injection seat are respectively provided with a fixing sleeve, the fixing sleeves are rotationally connected with the blade shaft, an air pipe is fixedly connected onto the fixing sleeves, the air pipe is connected with an external injector, and an air inlet groove, a plurality of second air inlet grooves and a plurality of air outlet grooves are formed in the blade shaft. Preferably, the steam pipe is communicated with the shell, the fixing seat is fixedly connected with the blade shaft, and the moving blades are uniformly distributed on the outer side wall of the fixing seat in circumference. Preferably, the stator blades and the moving blades are obliquely arranged on the blade shaft, one side spacing of adjacent stator blades in the single-group blade set is larger than the other side spacing, and one side with larger spacing to one side with smaller spacing are the steam flowing direction. Preferably, the plurality of stationary blades in the blade group are uniformly distributed on the circumference of the inner side wall of the shell, and the fixed seat and the blade group are distributed in a staggered manner in the direction of the blade shaft. Preferably, the air pipe is provided with a first air inlet channel, and the air injection seat is provided with a plurality of air outlet holes. Preferably, the air inlet groove is located at the inner side of the fixed sleeve, the air outlet groove is located at the inner side of the air outlet hole, the second air inlet channel is located in the blade shaft, and the air inlet groove is communicated with the air outlet groove through the second air inlet channel. Preferably, the air outlet groove is communicated with the plurality of air outlet holes, and the first air inlet channel is communicated with the air inlet groove. The external ejector has the beneficial effects that the external ejector conveys the alumina particles to the jet seat through the air pipe, the particles sequentially pass through the air inlet groove, the second air inlet groove and the air outlet groove, and finally are ejected out of a plurality of air outlet holes on the jet seat at high speed to impact the surface of the moving blade, so that a compressive stress layer is formed, on-line shot peening strengthening is realized