Main shaft sealing water supply device of bulb tubular hydroelectric generating set

Abstract

The utility model discloses a bulb tubular hydroelectric generating set main shaft seal water supply device which comprises a shunting ring pipe and a butt joint hose, the shunting ring pipe sleeves a main shaft seal through a rack, a plurality of quick connectors are annularly arranged on the shunting ring pipe at intervals, a plurality of quick connectors are annularly arranged on the main shaft seal at intervals, and quick connectors are arranged at the two ends of the butt joint hose. And the shunting ring pipe is hermetically communicated with the main shaft through a butt joint hose and a quick connector and is communicated with a water supply pipe. Compared with the prior art, the sealing structure is high in structural strength, easy to install and good in sealing performance.

Description

Technical Field

[0001] The utility model belongs to water turbine power generation equipment, in particular to a water supply device for main shaft sealing of a bulb tubular water turbine generator set. Background Art

[0002] The bulb-type cross-flow turbine generator set is a horizontally arranged turbine generator set. Its main structure includes a bulb-shaped runner, one or more guide vanes, a runner shaft and bearings. When water flows through the bulb-type cross-flow turbine, the water flow will impact the runner, causing the runner to rotate. The runner transfers power to the generator through the runner shaft and bearings, thereby generating electricity. It has significant advantages in the development of low-head hydropower resources.

[0003] At present, the main shaft seal of bulb-type hydro-turbine generator sets adopts hydraulic end face seal, the annular main shaft seal sleeve is connected to the main shaft, the water supply pipeline is connected to the main shaft seal, and pressurized water is supplied to the main shaft seal. Although this method has a simple structure and is easy to install, when the main shaft seal has a large diameter, since the water supply pipeline adopts centralized water supply, the farther away from the water supply point, the lower the water pressure, which will cause insufficient water supply in the local area of ​​the main shaft seal, affecting the lubrication effect.

[0004] In response to the above problems, the Chinese utility model patent application number 2015205033603 discloses a water supply ring pipe for the main shaft seal of a turbine, which includes a tee pipe fitting connected to an external water supply pipeline and several tee pipe fittings connected to the main shaft seal water tank water supply branch pipes, which are connected to form a ring around the main shaft seal water tank with a flexible pipe. It discloses a water supply ring pipe composed of a flexible pipe and a tee, which is connected to the water supply pipeline and the water supply branch pipe through the tee distribution. Through the diversion of the water supply ring pipe, the water supply to each area of ​​the main shaft seal is sufficient, and the pressure water pressure in the main shaft seal is consistent as a whole. However, there are some problems in the actual operation of this scheme: the water supply ring pipe is composed of multiple sections of flexible pipes and tees, the overall strength is low, and the assembly is cumbersome; the connection method adopts a tee, the connection operation is relatively troublesome, and the connection is prone to leakage and the sealing is not high. Utility Model Content

[0005] The utility model aims to overcome the existing problems of sealing connection between water supply ring pipe and main shaft, and to provide a main shaft sealing water supply device of bulb tubular hydro-generator set which has high structural strength, is easy to install and has good sealing performance.

[0006] The utility model solves the technical problem by adopting a technical solution: a bulb-type cross-flow type turbine generator set main shaft seal water supply device, comprising a shunt ring pipe and a docking hose, the shunt ring pipe is sleeved on the main shaft seal through a frame, a spacer ring on the shunt ring pipe is provided with a plurality of quick connectors, a spacer ring on the main shaft seal is provided with a plurality of quick connectors, quick connectors are provided at both ends of the docking hose, the shunt ring pipe is connected with the main shaft seal through the docking hose and the quick connector, and the shunt ring pipe is connected with the water supply pipe.

[0007] Optionally, the diversion ring pipe is a hard pipe, and the docking hose is a metal hose.

[0008] The usage and principle of the utility model are as follows: during installation, the shunt ring pipe is fixed horizontally by a frame so that it covers the main shaft seal, a docking hose is used, and a quick connector is adopted for quick plugging to connect the shunt ring pipe with the main shaft seal, and the water flow from the water supply pipe passes through the shunt ring pipe, and its pressure and speed will be relatively stable, and the water flow can be better distributed to the main shaft seal through the docking hose, avoiding the situation in which the water flow is large in a local area of ​​the main shaft seal and the water flow is small in another area, thereby effectively enhancing the lubrication effect; the quick connector can realize simple and quick connection and separation of the docking hose, the shunt ring pipe and the main shaft seal, which is convenient for installation and maintenance and has good sealing performance; the docking hose adopts a hose structure, which is convenient for connection on the one hand, and can reduce the influence of equipment vibration on the connection on the other hand.

[0009] Compared with the prior art, the utility model has the following beneficial effects: the utility model has higher structural strength, is easy to install and has good sealing performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 This is a schematic diagram of the top view structure of the utility model;

[0011] The components in the accompanying drawings are marked as follows: flow distribution ring pipe 1, docking hose 2, main shaft seal 3, quick connector 4, water supply pipe 5. DETAILED DESCRIPTION

[0012] Embodiment 1, below combines Figure 1The utility model is further described. The main shaft seal water supply device of the bulb cross-flow type turbine generator set includes a shunt ring tube 1 and a docking hose 2. The shunt ring tube covers the main shaft seal 3 through a frame. The frame fixes the shunt ring tube horizontally in the air so that it is sleeved outside the main shaft seal. There is a certain distance between the shunt ring tube and the main shaft seal. A plurality of quick connectors 4 are arranged on the spacer ring on the shunt ring tube. The quick connectors are quick connector female heads. The quick connectors are sealed and fixed on the shunt ring tube. A plurality of quick connectors are quick connector female heads. The quick connectors are sealed and fixed on the main shaft seal. Quick connectors are sealed and fixed at both ends of the docking hose. The quick connectors are quick connector male heads. The quick connectors at both ends of the docking hose are respectively plugged with the quick connectors of the shunt ring tube and the main shaft seal. The shunt ring tube is connected to the main shaft seal through the docking hose and the quick connector. The shunt ring tube is connected to the water supply pipe 5. The quick connector described above is a connector that can connect or disconnect pipelines without tools and adopts an open and closed type at both ends.

[0013] Optionally, in order to improve the structural strength, the diversion ring pipe is a hard pipe and the docking hose is a metal hose.

[0014] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by any technician familiar with the technical field within the technical scope disclosed in the present invention should be included in the protection scope of the present invention.

Claims

1. A water supply device for a main shaft seal of a bulb-type hydro-turbine generator set, comprising a flow dividing ring pipe (1) and a docking hose (2), wherein the flow dividing ring pipe is sleeved on a main shaft seal (3) through a frame, and wherein: The spacer ring on the flow dividing ring is provided with a plurality of quick connectors (4), the spacer ring on the main shaft seal is provided with a plurality of quick connectors, quick connectors are provided at both ends of the docking hose, the flow dividing ring is connected to the main shaft seal via the docking hose and the quick connector, and the flow dividing ring is connected to the water supply pipe (5).

2. The main shaft seal water supply device of the bulb tubular turbine generator set according to claim 1 is characterized in that: The diversion ring pipe is a hard pipe and the butt hose is a metal hose.

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