Search

CN-224200709-U - Impeller structure of turbine expander

CN224200709UCN 224200709 UCN224200709 UCN 224200709UCN-224200709-U

Abstract

The utility model relates to the field of energy power engineering and discloses an impeller structure of a turbine expander, which comprises a rotating shaft and an impeller, wherein a plurality of blades are fixedly connected to the outer side of the impeller, a connecting column is fixedly connected to the outer side of the impeller, the outer side of the connecting column is slidably connected to the inner side of the rotating shaft, a fixing mechanism is arranged in the rotating shaft, an anti-falling mechanism is arranged on the outer side of the rotating shaft, the fixing mechanism comprises two hollow columns, the outer side of each hollow column is fixedly connected to the inner side of the rotating shaft, a pull rod is slidably connected to the inner side of each hollow column, a gasket is fixedly connected to the outer side of each pull rod, and a spring is sleeved on the outer side of each pull rod. When the impeller is replaced, the nut is twisted to be separated from the nut, the lower shell and the upper shell are opened, the pull ring is pulled to pull the pull rod out of the connecting column, the old impeller is taken out, a new impeller is installed, the connecting column is inserted into the rotating shaft, the pull ring is loosened to rebound the pull rod by the spring, the shell is closed, and the fixing plate is fixed by the nut and the nut, so that the replacement is completed.

Inventors

  • WANG PENG
  • CUI YONGSEN
  • QIN RUISHENG

Assignees

  • 河南中科清能科技有限公司
  • 中科氢智科技(河南)有限公司
  • 河南中科清能先进装备制造有限公司
  • 陕西氢启源流科技有限公司
  • 深圳中科清储科技有限公司

Dates

Publication Date
20260505
Application Date
20250619

Claims (8)

  1. 1. The impeller structure of the turbine expander comprises a rotating shaft (1) and an impeller (2) and is characterized in that a plurality of blades (12) are fixedly connected to the outer side of the impeller (2), a connecting column (5) is fixedly connected to the outer side of the impeller (2), the outer side of the connecting column (5) is slidably connected to the inner side of the rotating shaft (1), a fixing mechanism is arranged in the rotating shaft (1), and an anti-falling mechanism is arranged on the outer side of the rotating shaft (1); The fixing mechanism comprises two hollow columns (10), the outer sides of the hollow columns (10) are fixedly connected inside the rotating shaft (1), pull rods (11) are slidably connected inside the hollow columns (10), gaskets (13) are fixedly connected to the outer sides of the pull rods (11), and springs (14) are sleeved on the outer sides of the pull rods (11).
  2. 2. The impeller structure of a turboexpander according to claim 1, wherein the blades (12) are provided with an inner layer (15), an intermediate transition layer (16) and an outer layer (17) in this order from inside to outside.
  3. 3. The impeller structure of a turboexpander according to claim 1, wherein the anti-disengaging mechanism comprises a lower shell (3) and an upper shell (4), the lower shell (3) and the upper shell (4) are both arranged on the outer side of the rotating shaft (1), a second fixing plate (9) is fixedly connected on the outer side of the lower shell (3), the outer side of the lower shell (3) is rotatably connected on the outer side of the upper shell (4), a first fixing plate (7) is fixedly connected on the outer side of the upper shell (4), a nut (6) is slidably connected in the middle of the first fixing plate (7) and the second fixing plate (9), and a nut (8) is screwed on the outer side of the nut (6).
  4. 4. The impeller structure of a turboexpander according to claim 1, wherein the spacer (13) is slidably connected to the inside of the hollow column (10), and a pull ring is rotatably connected to one end of the pull rod (11) away from the spacer (13).
  5. 5. The impeller structure of a turboexpander according to claim 1, wherein one end of the spring (14) is abutted against the hollow column (10), and the other end of the spring (14) is fixedly connected to the top of the gasket (13).
  6. 6. The impeller structure of a turboexpander according to claim 2, wherein the inner layer (15) is stainless steel, the intermediate transition layer (16) is white corundum, and the outer layer (17) is a tungsten carbide cobalt chromium compound.
  7. 7. The impeller structure of a turboexpander according to claim 3, wherein the top of the nut (6) is abutted against the bottom of the second fixing plate (9).
  8. 8. An impeller structure of a turboexpander according to claim 3, wherein one end of the pull rod (11) is abutted against the inner wall of the upper shell (4), the other end of the pull rod (11) is abutted against the inner wall of the lower shell (3), and the outer side of the pull rod (11) is inserted into the connecting column (5).

Description

Impeller structure of turbine expander Technical Field The utility model relates to the field of energy power engineering, in particular to an impeller structure of a turbine expander. Background With the rapid development of modern industrial technology, in particular in the fields of petrochemical industry, natural gas liquefaction and cryogenic technology, a turboexpander is used as a core device for energy recovery and refrigeration, and the turboexpander is increasingly widely used. The turbine expander expands and works in the impeller through the high-pressure gas, and converts the pressure energy and the heat energy of the gas into mechanical energy, so that low-temperature refrigeration or external work output is realized. The impeller is the most critical core component of the turbine expander, and the structural design and the material performance of the impeller directly determine the operation efficiency, the stability and the service life of the whole machine. However, the prior art turboexpander impeller constructions still suffer from a number of deficiencies. Firstly, in structural design, traditional impeller and pivot adopt interference fit or complicated fastener to be connected more, and this makes impeller's dismantlement and change process very loaded down with trivial details, consuming time hard, has not only seriously influenced the maintenance efficiency of equipment, causes the damage to main shaft or impeller itself in the dismouting in-process moreover, has increased cost of maintenance and downtime, influences production. Secondly, in the aspect of blade materials, the existing blades are made of single metal materials, the comprehensive performance of the existing blades is difficult to meet the severe requirements under the high-speed rotation and complex gas environment, the problems of insufficient strength, easiness in gas flow erosion and abrasion and poor chemical corrosion resistance are generally caused, the blade of the impeller is easy to damage, the service life is short, the equipment is influenced by frequent replacement, and the impeller structure of the turbine expander is provided for solving the problems. Disclosure of utility model In order to make up for the defects, the utility model provides an impeller structure of a turbine expander, and aims to solve the problems that in the prior art, the impeller is inconvenient to assemble and disassemble, and the blades are low in strength, easy to damage and short in service life. In order to achieve the above purpose, the present utility model adopts the following technical scheme: The impeller structure of the turbine expander comprises a rotating shaft and an impeller, wherein a plurality of blades are fixedly connected to the outer side of the impeller, a connecting column is fixedly connected to the outer side of the impeller, the outer side of the connecting column is slidably connected to the inner side of the rotating shaft, a fixing mechanism is arranged in the rotating shaft, and an anti-falling mechanism is arranged on the outer side of the rotating shaft; The fixing mechanism comprises two hollow columns, the outer sides of the hollow columns are fixedly connected inside the rotating shaft, a pull rod is connected inside the hollow columns in a sliding mode, a gasket is fixedly connected to the outer sides of the pull rod, and a spring is sleeved on the outer sides of the pull rod; As a further description of the above technical solution: the blade is sequentially provided with an inner layer, a middle transition layer and an outer layer from inside to outside; As a further description of the above technical solution: The anti-disengaging mechanism comprises a lower shell and an upper shell, wherein the lower shell and the upper shell are arranged on the outer side of the rotating shaft, a second fixing plate is fixedly connected to the outer side of the lower shell, the outer side of the lower shell is rotatably connected to the outer side of the upper shell, a first fixing plate is fixedly connected to the outer side of the upper shell, nuts are slidably connected to the middle parts of the first fixing plate and the second fixing plate, and nuts are screwed on the outer sides of the nuts; As a further description of the above technical solution: the gasket is connected inside the hollow column in a sliding way, and one end, away from the gasket, of the pull rod is rotationally connected with a pull ring; As a further description of the above technical solution: One end of the spring is abutted against the hollow column, and the other end of the spring is fixedly connected to the top of the gasket; As a further description of the above technical solution: The inner layer is stainless steel, the intermediate transition layer is white corundum, and the outer layer is a tungsten carbide cobalt chromium compound; As a further description of the above technical solution: the top of the nut is abutted agai