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CN-116677469-B - Nozzle structure with variable radial position

CN116677469BCN 116677469 BCN116677469 BCN 116677469BCN-116677469-B

Abstract

The invention relates to a nozzle structure with a variable radial position, and belongs to the technical field of turbocharging. The nozzle structure comprises a fixed disc, an adjusting block, a nozzle and a shifting fork. The fixed disc is an annular disc, a plurality of round holes are formed in the fixed disc and used for accommodating the adjusting blocks, the adjusting blocks are cylindrical blocks with the sizes matched with the round holes in the fixed disc and can rotate around a round hole center shaft, eccentric holes are formed in the adjusting blocks, the nozzle mainly comprises nozzle blades and a rotating rod, the rotating rod is arranged in the eccentric holes of the adjusting blocks, and a shifting fork is connected with the rotating rod of the nozzle and used for adjusting the angle of the nozzle. According to the invention, the position of the eccentric hole on the regulating block, namely the position of the center of the nozzle rotating rod, can be changed by rotating the regulating block, so that the purpose of regulating the radial position of the nozzle relative to the axis of the integral mechanism is achieved, the nozzle structure has a larger range of regulating capability, and the regulating range of the turbine end can be widened and the turbine with multiple wheel diameter sizes can be adapted.

Inventors

  • LIU XINYUAN
  • CHENG JIANGHUA
  • ZHANG ZILEI
  • YANG LEI
  • TANG FEIFEI
  • Ding Zhanming
  • XUE XINGXU

Assignees

  • 中国北方发动机研究所

Dates

Publication Date
20260508
Application Date
20230713

Claims (7)

  1. 1. The nozzle structure with the changeable radial position is characterized by comprising a fixed disc (1), an adjusting block (2), a nozzle (3) and a shifting fork (4); the fixed disc (1) is an annular disc, and a plurality of round holes are formed in the disc according to the positions of the required mounting blades; The adjusting block (2) is a cylindrical block with the size matched with that of a round hole on the fixed disc, is arranged in the round hole and rotates around a center shaft of the round hole, an eccentric hole is arranged on the adjusting block and is used for installing a nozzle, and a position mark is arranged on the adjusting block; The nozzle (3) is an adjustable nozzle and comprises a nozzle blade and a rotating rod, wherein the rotating rod is arranged in an eccentric hole of the adjusting block and rotates around an eccentric Kong Zhouxin; the shifting fork (4) is positioned at the bottom of the fixed disc (1), and is connected with a rotating rod of the nozzle (3) by the shifting fork (4) and used for adjusting the angle of the nozzle (3); Wherein, the The position of the eccentric hole on the regulating block (2), namely the position of the center of the nozzle rotating rod, is changed by rotating the regulating block (2), so that the purpose of regulating the radial position of the nozzle relative to the axis of the integral mechanism is achieved; The adjustable range of the radial position is 2 times of the eccentricity of the eccentric hole of the adjusting block (2); The radial position of the nozzle is changed to match with the adjustment of the angle of the nozzle, so that the adjusting capability of the nozzle structure is enhanced, and the turbine is better adapted to different working condition characteristics of the turbine.
  2. 2. The variable radial position nozzle structure of claim 1 wherein the nozzle structure is positioned coaxially with the turbine and the nozzle vanes correspond to the turbine inlet positions.
  3. 3. A nozzle arrangement with variable radial position according to claim 1, characterized in that the position marks are centered on the same axis of the adjusting block (2) as the eccentric holes and are located at both ends of the axis of the adjusting block (2).
  4. 4. A nozzle arrangement with variable radial position according to claim 1, characterized in that the fork (4) is connected to the bottom of the rotating lever of the nozzle.
  5. 5. A nozzle arrangement with variable radial positions according to claim 1, characterized in that the nozzle (3) is in a small radial position relative to the overall mechanism when the position mark is located at the outermost ring.
  6. 6. A nozzle arrangement with variable radial positions according to claim 1, characterized in that the nozzle (3) is in a large radial position relative to the whole mechanism when the position mark is located at the innermost ring.
  7. 7. A nozzle arrangement with variable radial position according to claim 1, wherein the nozzle (3) is variable in position, the same nozzle arrangement being adapted to turbines of different wheel diameter sizes, the nozzle being adapted to turbines of large wheel diameter when in a large radial position and to turbines of small wheel diameter when in a small radial position.

Description

Nozzle structure with variable radial position Technical Field The invention belongs to the technical field of turbocharging, and particularly relates to a nozzle structure with a variable radial position. Background Turbochargers are widely used in engines today to increase the density of the engine charge by utilizing the energy of the exhaust gases from the engine. In order to adapt to the good operation of the wide-range working condition of the engine, a turbine nozzle structure or a variable nozzle mechanism is often adopted to improve the turbine efficiency of the supercharger. Compared with the common turbocharger, the variable nozzle turbocharger has the advantages of improving the torque characteristic and the acceleration of the engine under the low-speed working condition and further improving the power recovery under the high-altitude working condition of the engine because the wide flow matching of the engine under the wide speed range can be realized. Because the variable nozzle turbocharger can realize good matching under the full working condition range of the engine, the transient response of the engine under the low-speed working condition is improved, and the problems of overspeed and overtemperature of the turbocharger under the high-speed working condition are avoided. However, the current nozzle mechanisms are basically fixed in position of a nozzle rotating shaft, the nozzle opening is regulated through the rotation angle of the nozzle, and the regulating range is relatively limited, so that the nozzle mechanism with adjustable radial positions is required, the regulating range is widened, and the precise regulating capability of multiple working conditions and the adaptability of the multiple-wheel-diameter turbine are improved. Disclosure of Invention First, the technical problem to be solved The invention aims to solve the technical problem of providing a nozzle structure with a variable radial position, so as to solve the problems that the existing nozzle mechanism basically has a fixed position of a nozzle rotating shaft, the opening of the nozzle is regulated by the rotating angle of the nozzle, and the regulating range is relatively limited. (II) technical scheme In order to solve the technical problems, the invention provides a nozzle structure with a variable radial position, which comprises a fixed disc (1), an adjusting block (2), a nozzle (3) and a shifting fork (4); the fixed disc (1) is an annular disc, and a plurality of round holes are formed in the disc according to the positions of the required mounting blades; The adjusting block (2) is a cylindrical block with the size matched with that of a round hole on the fixed disc, the adjusting block is arranged in the round hole and can rotate around the center shaft of the round hole, an eccentric hole is arranged on the adjusting block and is used for installing a nozzle, and a position mark is arranged on the adjusting block; The nozzle (3) is a fixed nozzle or an adjustable nozzle and comprises a nozzle blade and a rotating rod, wherein the rotating rod is arranged in an eccentric hole of the adjusting block and is fixed in the eccentric hole or rotates around an eccentric Kong Zhouxin; the shifting fork (4) is positioned at the bottom of the fixed disc (1), and when the nozzle is an adjustable nozzle, the shifting fork (4) is connected with a rotating rod of the nozzle (3) for adjusting the angle of the nozzle (3). Further, the nozzle structure position is coaxial with the turbine, and the nozzle blade corresponds to the turbine inlet position. Further, the position marks and the center of the eccentric hole are positioned on the same axis of the adjusting block (2) and positioned at two ends of the axis of the adjusting block (2). Further, when the nozzle (3) is an adjustable nozzle, the shifting fork (4) is connected with the bottom of the rotating rod of the nozzle. Further, the position of the eccentric hole on the regulating block (2), namely the position of the center of the nozzle rotating rod, is changed by rotating the regulating block (2), so that the purpose of regulating the radial position of the nozzle relative to the axis of the integral mechanism is achieved. Further, when the position mark is located at the outermost ring, the nozzle (3) is located at a small radial position with respect to the whole mechanism. Further, when the position mark is located at the innermost ring, the nozzle (3) is in a large radial position with respect to the overall mechanism. Further, the radial position adjustable range is 2 times of eccentricity of the eccentric hole of the adjusting block (2). Furthermore, when the nozzle (3) is an adjustable nozzle, the adjusting capability of the nozzle structure is enhanced by changing the radial position of the nozzle and matching with the adjustment of the angle of the nozzle, and the turbine is better adapted to different working condition characteristics of the turbine. Furth