CN217300751U

CN217300751U - Shaft extension through-flow turbine with front-mounted blade adjusting device

Info

Publication number: CN217300751U
Application number: CN202220054115.9U
Authority: CN
Inventors: 周广新; 徐伦忠; 封林; 何涛
Original assignee: Jiangsu Aerospace Hydraulic Equipments Ltd
Current assignee: Jiangsu Aerospace Hydraulic Equipments Ltd
Priority date: 2022-01-11
Filing date: 2022-01-11
Publication date: 2022-08-26
Anticipated expiration: 2032-01-11

Abstract

A shaft extension through-flow turbine with a front-mounted blade adjusting device relates to the technical field of turbines. The novel bulb is characterized by comprising a water inlet channel, a runner chamber and an S-shaped tail water elbow runner which are connected in sequence, wherein a bulb body is installed in the water inlet channel, a front main shaft is installed in the bulb body, the rear end of the front main shaft stretches out of the bulb body and is connected with a rear main shaft through a runner mechanism, a front main shaft sealing device is installed between the front main shaft and the bulb body, one end, away from the runner mechanism, of the front main shaft is connected with a paddle servomotor through a connecting support, one end, away from the front main shaft, of the paddle servomotor is connected with an oil circuit integrated block, and the paddle servomotor and the oil circuit integrated block are installed in the bulb body through support frames respectively. The utility model discloses a shaft extension through-flow Kaplan turbine of high oil pressure paddle servomotor because paddle servomotor, oil circuit integrated package equipartition put the bulb internal, easy maintenance even there is the oil leakage oil, also can not flow in the aquatic.

Description

Shaft extension through-flow turbine with front-mounted blade adjusting device

Technical Field

The utility model relates to a hydraulic turbine technical field specifically is a leading axle extension through-flow turbine of blade adjusting device.

Background

At present, a shaft extension through-flow rotary-propeller water turbine in China generally adopts an oil supply head with a floating bush shaft side structure for supplying oil, and the oil supply head receives pressure oil (the pressure grade is 4.0MPa or 6.3 MPa) provided by an oil pressure device and adopts a pressure charging type servomotor to drive an operation frame in a rotary wheel to axially move so as to realize the rotation of blades. This form of construction has been in use for many years.

The structure has the following disadvantages: according to the structure, the operating oil pipes are required to be arranged in the rotating wheel and the main shaft, when the unit operates, the inner cavity of the rotating wheel is filled with pressure oil, after the unit operates for 3-5 hours, the servomotor in the rotating wheel needs to be overhauled, otherwise, the oil in the rotating wheel leaks to the downstream of the water flow channel, and water pollution is caused. When a conventional speed regulator for supplying oil to a 4.0MPa or 6.3MPa floating bush type oil receiver is adopted, a 4.0MPa or 6.3MPa gas system needs to be configured in a power station to ensure the stability of an oil pressure device, so that more pipelines and a complex structure are arranged in the power station, and the unit installation and later maintenance cost is invisibly increased.

The rainfall is reduced in winter, the power station always stores water but does not generate electricity, the requirement of ecological flow cannot be met, and the power generation yield of the power station is reduced due to the fact that the set is operated under low load or the water is discharged after the gate is opened. Therefore, the fixed propeller unit can be changed into a rotating propeller, the small-angle stable operation is realized, and the power generation benefit of the power station is improved.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a leading axle extension through-flow turbine of blade adjusting device can effectively solve the problem among the background art.

The technical scheme for realizing the purpose is as follows: a shaft extension through-flow turbine with a front-mounted blade adjusting device comprises a water inlet channel, a runner chamber and an S-shaped tail water elbow runner which are sequentially connected, wherein a bulb body is arranged in the water inlet channel, a front main shaft is arranged in the bulb body, the rear end of the front main shaft extends out of the bulb body and is connected with a rear main shaft through a runner mechanism, a front main shaft sealing device is arranged between the front main shaft and the bulb body, the runner mechanism is arranged in the runner chamber, the rear main shaft extends out of the S-shaped tail water elbow runner backwards, the extending end of the rear main shaft is supported and arranged through a thrust bearing box, and a rear main shaft sealing device is arranged between the rear main shaft and the S-shaped tail water elbow runner;

the method is characterized in that: one end of the front main shaft, which is far away from the rotating wheel mechanism, is connected with a blade servomotor through a connecting support, one end of the blade servomotor, which is far away from the front main shaft, is connected with an oil circuit manifold block, the oil circuit manifold block is provided with a first oil circuit channel and a second oil circuit channel, the first oil circuit channel is connected with a rod cavity of the blade servomotor, and the second oil circuit channel is connected with a rodless cavity of the blade servomotor;

the front main shaft is further provided with a center hole, an operating shaft penetrates through the center hole in a sliding mode, one end of the operating shaft is connected with a piston rod of the blade servomotor, and the other end of the operating shaft is connected with an operating frame of the rotating wheel mechanism.

Furthermore, the blade servomotor and the oil circuit integrated block are respectively arranged in the bulb body through a support frame.

Further, the oil source pressure of the servomotor is 16 MP.

The utility model has the advantages that:

the utility model discloses the operation oil source of paddle servomotor is 16MPa, and is unanimous with the pressure oil source pressure of stator servomotor, has cancelled power station high-pressure gas system, has reduced power station high-pressure gas pipeline, has improved the clean and tidy nature in power station.

The utility model discloses a shaft extension through-flow Kaplan turbine of high oil pressure paddle servomotor because paddle servomotor, oil circuit integrated package equipartition put the bulb internal, easy maintenance even there is the oil leakage oil, also can not flow into the aquatic, thereby need not pressure oil in the runner and avoided the oil that original structure leads to because of the maintenance of a specified duration to leak and cause water pollution, the spirit of the national institute's advocated green water and electricity of having laminated more.

Drawings

Fig. 1 is a schematic structural view of the present invention;

FIG. 2 is an enlarged view of a portion A of FIG. 1;

FIG. 3 is a partial enlarged view of portion B of FIG. 1;

fig. 4 is a partial schematic view of fig. 2.

Detailed Description

As shown in fig. 1-4, the utility model discloses a inhalant canal 1 that connects gradually, runner room 2, S type tail water elbow pipe runner 3, install bulb body 4 in the inhalant canal 1, install preceding main shaft 5 in the bulb body 4, the rear end of preceding main shaft stretches out bulb body 4, and be connected with back main shaft 8 through runner mechanism 7, install preceding main shaft sealing device 6 between preceding main shaft 5 and the bulb body 4, runner mechanism 7 is installed in runner room 2, back main shaft 8 stretches out S type tail water elbow pipe runner 3 backward, and stretch out the end and support the installation through thrust bearing case 10, install back main shaft sealing device 9 between back main shaft 8 and the S type tail water elbow pipe runner 3.

One end of the front main shaft 5, which is far away from the rotating wheel mechanism 7, is connected with a blade servomotor 12 through a connecting support 11, the pressure of an oil source of the blade servomotor 12 is 16MP, one end of the blade servomotor 12, which is far away from the front main shaft 5, is connected with an oil circuit manifold block 13, the blade servomotor 12 and the oil circuit manifold block 13 are respectively installed in the bulb body 4 through a support frame 16, the oil circuit manifold block 13 is provided with a first oil circuit channel 14 and a second oil circuit channel 15, the first oil circuit channel 14 is connected with a rod cavity of the blade servomotor 12, and the second oil circuit channel 15 is connected with a rodless cavity of the blade servomotor 12.

The front main shaft 5 is also provided with a central hole, an operating shaft 17 slides in the central hole, one end of the operating shaft 17 is connected with a piston rod of the blade servomotor 12 through a coupling 18, and the other end is connected with an operating frame of the rotating wheel mechanism 7.

The utility model discloses during operation, when the flow that pressure oil will need sent into paddle servomotor 12 through first oilway way 14 or second oilway way 15 of oil circuit manifold block 13, paddle servomotor 12 drives operation axis 17 and drives the handling frame axial left and right sides removal of runner mechanism 7, and the interior blade adjustment mechanism of pulling runner wheel hub makes the blade angle of runner mechanism 7 rotatory towards the positive negative direction.

Application example:

taking a certain power station as an example: the power station is built in 2006 and is an axial-extension through-flow rotary-propeller turbine, the model of the unit is GZ-WS-245, the rated output is 1250KW, and the model of the matched generator is SFW 1250-8/1430. The unit originally adopts a structure of a floating tile type oil receiver, the unit operates for nearly 14 years, and the rotating wheel of the unit has an oil leakage phenomenon to influence the downstream water environment. In order to fully utilize water energy resources and treat water body pollution, the structure disclosed by the utility model is replaced, after 13000 hours of accumulated operation, the oil leakage phenomenon of the servomotor is not found, and the downstream water body does not find the organic oil to be discharged. Brings great economic and social benefits to the operation of the power station and the environmental protection, and simultaneously proves the advancement and the reliability of the design of the device.

Claims

1. A shaft extension through-flow turbine with a front-mounted blade adjusting device comprises a water inlet channel, a runner chamber and an S-shaped tail water elbow runner which are sequentially connected, wherein a bulb body is arranged in the water inlet channel, a front main shaft is arranged in the bulb body, the rear end of the front main shaft extends out of the bulb body and is connected with a rear main shaft through a runner mechanism, a front main shaft sealing device is arranged between the front main shaft and the bulb body, the runner mechanism is arranged in the runner chamber, the rear main shaft extends out of the S-shaped tail water elbow runner backwards, the extending end of the rear main shaft is supported and arranged through a thrust bearing box, and a rear main shaft sealing device is arranged between the rear main shaft and the S-shaped tail water elbow runner;

2. A shaft-extending through-flow turbine with a forward blade adjusting device according to claim 1, wherein: the blade servomotor and the oil circuit integrated block are respectively arranged in the bulb body through the supporting frame.

3. A shaft-extending through-flow turbine with a forward blade adjusting device according to claim 1, wherein: the oil source pressure of the blade servomotor is 16 MP.