Axial flow turbine with main shaft sealing device
A main shaft sealing and axial flow technology, applied in hydropower, mechanical equipment, engine components, etc., can solve the problems of poor sealing effect, difficult replacement of main shaft sleeve, water inflow of turbine, etc., to reduce frictional resistance and simple structure. , the effect of protecting the spindle
Inactive Publication Date: 2018-03-30
高邮市大江泵业有限公司
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Problems solved by technology
[0002] The shaft sealing device of the axial flow turbine is an important part to ensure the safe operation of the turbine unit. Generally, there is a main shaft sleeve between the main shaft of the water turbine and the sealing device to protect the main shaft of the water turbine. The main shaft sleeve rotates with the main shaft of the water turbine. , It is not easy to replace the main shaft sleeve after it is worn out. If the main shaft sleeve is flexibly connected with the main shaft of the turbine, there will inevitably be a gap between the main shaft sleeve and the main shaft of the water turbine, which needs to be sealed with a sealing strip. If the sealing strip is accidentally worn, the sealing effect will deteriorate, which will cause the turbine to break water
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[0015] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0016] see Figure 1-3 , the present invention provides a technical solution: an axial-flow turbine with a main shaft sealing device, including a main shaft 1 and a fixed plate 21, a main shaft sleeve 2 is movably sleeved on the main shaft 1, and a movable sleeve between the main shaft sleeve 2 and the main shaft 1 A seal 3 is connected, the top of the seal 3 is provided with a compacting plate 4, the compacting plate 4 is provided with a mounting hole 5, the ...
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The invention discloses an axial flow turbine with a main shaft sealing device and belongs to the field of main shaft sealing devices for hydrogenerators. The axial flow turbine comprises a main shaftand a fixing plate. The main shaft is movably sleeved with a main shaft sleeve. A sealing piece is movably arranged between the main shaft sleeve and the main shaft in a sleeve joint manner. A compaction plate is arranged on the top of the sealing piece. A fixing bolt is spirally connected with a fixing hole. A compaction spring is arranged on the top of the compaction plate. The other end of thecompaction spring is connected with the fixing bolt, and the compaction spring is wound around the top of the fixing bolt. The outer side of the main shaft sleeve is sleeved with a sealing seat, andthe sealing seat is fixedly connected with the fixing plate through bolts. The main shaft sleeve plays a role in protecting the main shaft. The compaction plate applies axial pressure through the fixing bolt to compact the sealing piece, and the radial size of the sealing piece deforms and enlarges so that the sealing piece can be in contact with the main shaft for sealing; and after the sealing piece is worn by accident, the axial pressure is applied to the compaction plate due to the tension of the compaction spring for sealing, lubricating grease can be stored in a sealing cavity, and the friction resistance is reduced.
Description
technical field [0001] The invention relates to the field of a main shaft sealing device of a hydraulic generator, in particular to an axial flow water turbine with a main shaft sealing device. Background technique [0002] The shaft sealing device of the axial flow turbine is an important part to ensure the safe operation of the turbine unit. Generally, there is a main shaft sleeve between the main shaft of the water turbine and the sealing device to protect the main shaft of the water turbine. The main shaft sleeve rotates with the main shaft of the water turbine. , It is not easy to replace the main shaft sleeve after it is worn out. If the main shaft sleeve is flexibly connected with the main shaft of the turbine, there will inevitably be a gap between the main shaft sleeve and the main shaft of the water turbine, which needs to be sealed with a sealing strip. If the sealing strip is accidentally worn, the sealing effect will deteriorate, which will cause the turbine to b...
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IPC IPC(8): F03B11/00
CPCF03B11/006Y02E10/20
Inventor 徐祝山徐鹏程
Owner 高邮市大江泵业有限公司