CN202520959U - Water turbine spindle sealing device - Google Patents

Abstract

The utility model relates to a sealing device for a hydraulic turbine main shaft. The sealing device includes a runner crown, a top cover, a labyrinth gap seal, a water guide ring and a water throwing ring. The runner crown is arranged on the periphery of the hydraulic turbine main shaft and fixed on the main shaft. , the top cover is set on the outside of the main shaft, the labyrinth gap seal is set in the cavity surrounded by the upper crown of the runner and the top cover, the water guide ring is fixed on the top cover, and the water throwing ring is fixed on the main shaft and set inside the water guide ring , the water guide ring is connected to a drain pipe. The utility model is not easy to cause phenomenons such as sealing part burnout and spindle wear, and has the advantages of simple structure, convenient disassembly and maintenance, good sealing performance and long service life.

Description

A water turbine main shaft sealing device

technical field

The utility model relates to a water turbine main shaft device, in particular to a water turbine main shaft sealing device.

Background technique

The function of the main shaft seal of the turbine in the power generation machinery is to block water leakage in the gap between the rotating part and the fixed part. The quality of the main shaft sealing performance directly affects the safe and stable operation of the unit.

The main shaft seal of the water turbine generally adopts end-face contact seals, such as packing seals, packing seals, single-layer or double-layer rubber seals, radial or end-face carbon block (nylon block) seals, water pump seals, etc. The above-mentioned sealing methods are easy to cause Accidents of spindle seal failure such as seal and spindle wear, seal burnout, and seal aging affect the safe operation of the unit.

Utility model content

In order to overcome the deficiencies of the prior art, the utility model provides a hydraulic turbine main shaft sealing device with simple structure, good sealing performance and long service life.

A hydraulic turbine main shaft sealing device, the sealing device comprises a runner crown, a top cover, a labyrinth gap seal, a water guide ring and a water throwing ring, the runner crown is arranged on the periphery of the hydraulic turbine main shaft and fixed on the main shaft, and the top cover is arranged On the outside of the main shaft, the labyrinth gap seal is set in the cavity surrounded by the upper crown of the runner and the top cover, the water guide ring is fixed on the top cover, the water throwing ring is fixed on the main shaft and arranged inside the water guide ring, The water ring connects to a drain.

The labyrinth gap seal is used to improve the sealing effect, and the leaked water is directly discharged from the drain pipe through the water throwing ring and the water guide ring, preventing the leaking water from leaking along the axis of the main shaft.

The utility model is not easy to cause phenomenons such as sealing part burnout and spindle wear, and has the advantages of simple structure, convenient disassembly and maintenance, good sealing performance and long service life.

Description of drawings

Fig. 1 is a structural representation of the utility model.

Detailed ways

The utility model will be further described below in conjunction with the accompanying drawings and specific embodiments, but the protection scope of the utility model is not limited thereto.

Referring to Fig. 1, a sealing device for the main shaft of a hydraulic turbine, the sealing device includes a runner crown 1, a top cover 2, a labyrinth gap seal 7, a water guide ring 4 and a water throwing ring 3, and the runner crown 1 is arranged on the main shaft of the hydraulic turbine 5 and fixed on the main shaft 5, the top cover 2 is set outside the main shaft 5, the labyrinth gap seal 7 is set in the cavity surrounded by the upper crown 1 and the top cover 2 of the runner, and the water guide ring 4 is fixed on the top cover 2 , The water throwing ring 3 is fixed on the main shaft and is arranged inside the water guide ring 4, and the water guide ring 4 is connected to a drain pipe 6.

Water passes through the labyrinth gap seal 7, and the labyrinth gap seal 7 produces resistance to it and reduces its flow rate. The water leaked from the labyrinth gap seal 7 is then thrown out by the water throwing ring 3, and then guided along the water guide ring 4, and finally drained from the drain pipe. 6 discharge, so as to achieve the purpose of preventing water leakage from leaking along the axis of the main shaft 5.

In the utility model, the upper crown of the runner is arranged on the periphery of the main shaft of the water turbine and fixed on the main shaft, which avoids the direct contact between the main shaft and the sealing member, and reduces the wear of the main shaft.

Claims (1)

1. hydraulic turbine main shaft sealing device; It is characterized in that: said seal arrangement comprises runner crown, top cover, labyrinth clearance sealing, water guiding ring and slinger ring, and runner crown is located at the hydraulic turbine main shaft periphery and is fixed on the main shaft, and top cover is located at the main shaft outside; Labyrinth clearance sealing is arranged in the cavity that runner crown and top cover surround; Water guiding ring is fixed on the top cover, and slinger ring is fixed on the main shaft and is located at the water guiding ring inboard, and said water guiding ring connects a waste pipe.

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