A Compensation Structure for Tubular Turbine
A technology of tubular water turbine and compensation structure, applied in mechanical equipment, hydroelectric power generation, engine components, etc., can solve the problems of poor sealing reliability of compensation joints, water leakage, easy breakage of handle bolts, etc., to ensure uniformity and improve reliability. sexual effect
Active Publication Date: 2019-02-19
DONGFANG ELECTRIC MACHINERY
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Problems solved by technology
Since the runner chamber of the tubular turbine is a large annular thin-walled part, its rigidity is relatively poor, and it needs to withstand hydraulic vibration during the operation of the unit, resulting in poor sealing reliability of the compensation joint, frequent water leakage, and the operation of the runner chamber Insufficient stability; in addition, the bolts used to fix the large ring plate are easily broken, which affects the safe and stable operation of the unit
Method used
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[0017] Below in conjunction with accompanying drawing, the present invention is described in detail.
[0018] In order to make the object, technical solution and advantages of the present invention more clear, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.
[0019] like figure 2 As shown, a compensation structure for a tubular turbine includes a compensation joint 1, the compensation joint 1 is composed of an axial segment part 1a on the upstream side and a radial segment part 1b on the downstream side, and is divided radially. The cross-section is L-shaped as a whole, the radial section 1b of the compensation joint 1 is fixed on the draft tube flange 2 through a connecting piece, and is arranged between the radial section 1b of the compensation ...
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The invention discloses a through-flow turbine compensation structure which comprises a compensation section, wherein the compensation section is fixedly connected with a draft tube flange through a connecting part; the compensation section consists of an axial section part close to an upstream side and a radial section part close to a downstream side; the radial section part of the compensation section is fixed on the draft tube flange through the connecting part; and an adjusting mechanism for adjusting and constraining a circumference radial gap between a runner chamber and the compensationsection is arranged on the axial section part of the compensation section. Due to structural design of the compensation section, the adjusting mechanism is arranged at the axial section part corresponding to the runner chamber, the radial gap between the compensation section and the runner chamber is adjusted through the adjusting mechanism, and the downstream side of the runner chamber is radially constrained, so that the radial gap between the compensation section and the runner chamber and the sealing compression amount uniformity are ensured, and the sealing reliability and the stabilityof the runner chamber are effectively improved.
Description
technical field [0001] The invention belongs to the technical field of water turbine design, in particular to a compensation structure for a tubular water turbine. Background technique [0002] In tubular turbines, in order to eliminate the adverse effects of installation errors and thermal expansion and contraction on the normal assembly and operation of the runner chamber, an axial gap of 10-20mm is generally set between the downstream side of the runner chamber and the draft tube . The compensation joint of the tubular turbine is used for the connection between the downstream side of the runner chamber and the draft tube to ensure the sealing of the downstream end of the runner chamber. [0003] like figure 1 As shown, the existing tubular turbine compensation section mainly adopts a double-ring plate corner seal structure, and the large ring plate 15 is closed on the draft tube flange 2 to compensate the axial gap between the runner chamber 3 and the draft tube. An an...
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IPC IPC(8): F03B11/00
CPCF03B11/00F03B11/006Y02E10/20
Inventor 孙媛媛罗远红赵永智曾明富文树洁张小军李小兵黄莉张召张少辉
Owner DONGFANG ELECTRIC MACHINERY