CN210769118U

CN210769118U - Main shaft sealing device of impulse turbine

Info

Publication number: CN210769118U
Application number: CN201921563896.9U
Authority: CN
Inventors: 陈长明; 陈琦; 黄鑫兰; 崔究晶
Original assignee: Jiangsu Chuntian New Energy Technology Co ltd
Current assignee: Jiangsu Chuntian New Energy Technology Co ltd
Priority date: 2019-09-19
Filing date: 2019-09-19
Publication date: 2020-06-16
Anticipated expiration: 2029-09-19

Abstract

The utility model belongs to the field of sealing devices, in particular to a main shaft sealing device of an impulse turbine, aiming at the problems that the main shaft sealing of the existing impulse turbine mostly only uses a sealing ring for sealing, the sealing ring is easy to loose and deform, and the sealing effect is poor, the proposal is provided, which comprises a sealing cover, one side of the sealing cover is fixedly provided with a shell, a main shaft is rotatably arranged on the shell, the other side of the sealing cover is fixedly provided with a sealing cylinder, the sealing cover and the sealing cylinder are both provided with rotating holes, the outer side of the main shaft is connected with the side walls of the two rotating holes in a sliding way, the outer side of the main shaft is fixedly provided with a plurality of fan blades, the plurality of fan blades are all positioned in the sealing cylinder, one side of the sealing cylinder is provided with a plurality of air inlets, one side of the sealing cover is provided with a plurality of air, thereby playing a good sealing effect, simple structure and convenient use.

Description

Main shaft sealing device of impulse turbine

Technical Field

The utility model relates to a sealing device technical field especially relates to a main shaft sealing device of impulse turbine.

Background

The impulse turbine is a hydraulic prime mover which leads out free jet with kinetic energy by means of a special water guide mechanism, and the free jet impacts a runner bucket to enable a runner to rotate to do work, so that hydraulic energy is converted into mechanical energy. The impulse turbine is suitable for high-head and small-flow power stations, converts water from a pressure pipeline into high-speed jet flow through a nozzle, tangentially impacts a rotating wheel to push the rotating wheel to rotate, and then drives a generator rotor to rotate to generate electricity.

In the prior art, most of main shaft seals of impulse turbines are only sealed by sealing rings, the sealing rings are easy to loosen and deform, and the sealing effect is poor, so that the main shaft sealing device of the impulse turbine is provided for solving the problems.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the main shaft seal who has the impulse turbine among the prior art and mostly just using the sealing washer to seal, the sealing washer is not hard up the deformation easily, the poor shortcoming of sealed effect, and the main shaft seal device of an impulse turbine who provides.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the utility model provides a main shaft sealing device of impulse turbine, includes the sealed cowling, one side fixed mounting of sealed cowling has the casing, rotates on the casing and installs the main shaft, the opposite side fixed mounting of sealed cowling has a sealed section of thick bamboo, has all seted up the rotation hole on sealed cowling and the sealed section of thick bamboo, the outside and two lateral wall sliding connection who rotate the hole of main shaft, the outside fixed mounting of main shaft has a plurality of flabellums, and a plurality of flabellums all are located a sealed section of thick bamboo, a plurality of air inlets have been seted up to one side of a sealed cowling, and a plurality of blowing mouths have been seted up to one side of sealed cowling, the outside fixed mounting of main.

Preferably, the top of the sealing cover is provided with an exhaust port, the top of the sealing cover is provided with a sealing cover, and the bottom of the sealing cover covers the opening at the top of the exhaust port.

Preferably, a fixing plate is fixedly mounted on one side of the shell, one end of a spring is fixedly mounted at the bottom of the fixing plate, and the other end of the spring is fixedly connected with the top of the sealing cover.

Preferably, the fixed plate is provided with a guide hole, a guide rod is slidably mounted in the guide hole, and the bottom of the guide rod is fixedly connected with the top of the sealing cover.

Preferably, the number of the air inlets and the air blowing openings is at least four, and the plurality of air inlets and the plurality of air blowing openings are annularly distributed.

Compared with the prior art, the beneficial effects of the utility model reside in that:

(1) when the scheme is used, the fan blades are driven to rotate through the rotation of the main shaft, the fan blades rotate and blow air into the sealing cover through the air blowing openings, so that the air pressure in the sealing cover is increased, the air pressure in the sealing cover is larger than that in the shell, and water cannot seep out of the shell due to the pressure difference, so that a good sealing effect is achieved;

(2) the utility model discloses pressure differential can be so that water can not ooze in the casing to play fine sealed effect, simple structure, convenient to use.

Drawings

Fig. 1 is a schematic structural diagram of a main shaft sealing device of an impulse turbine provided by the present invention;

fig. 2 is a schematic structural diagram of a part a of a main shaft sealing device of an impulse turbine according to the present invention;

fig. 3 is a schematic view of a three-dimensional structure in which the main shaft and the sealing cylinder of the main shaft sealing device of the impulse turbine provided by the present invention are connected.

In the figure: the fan comprises a shell 1, a main shaft 2, a sealing cover 3, a sealing cylinder 4, a sealing ring 5, an air inlet 6, an air blowing opening 7, fan blades 8, an air outlet 9, a fixing plate 10, a spring 11 and a sealing cover 12.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.

Example one

Referring to fig. 1-3, a main shaft sealing device of impulse turbine, including sealed cowling 3, one side fixed mounting of sealed cowling 3 has casing 1, it has main shaft 2 to rotate on the casing 1, the opposite side fixed mounting of sealed cowling 3 has sealed section of thick bamboo 4, all seted up the rotation hole on sealed cowling 3 and the sealed section of thick bamboo 4, the outside and the lateral wall sliding connection in two rotation holes of main shaft 2, the outside fixed mounting of main shaft 2 has a plurality of flabellums 8, a plurality of flabellums 8 all are located sealed section of thick bamboo 4, a plurality of air inlets 6 have been seted up to one side of sealed section of thick bamboo 4, a plurality of gas blowing mouths 7 have been seted up to one side of sealed cowling 3, the outside fixed mounting of main shaft 2 has sealing washer.

In this embodiment, the top of the sealing cover 3 is provided with an exhaust port 9, the top of the sealing cover 3 is provided with a sealing cover 12, the bottom of the sealing cover 12 covers the opening at the top of the exhaust port 9, and the sealing cover 12 plays a role in opening and closing the exhaust port 9.

In this embodiment, a fixing plate 10 is fixedly installed at one side of the housing 1, one end of a spring 11 is fixedly installed at the bottom of the fixing plate 10, the other end of the spring 11 is fixedly connected with the top of the sealing cover 12, and the sealing cover 12 can be reset through the spring 11.

In this embodiment, a guide hole is formed in the fixing plate 10, a guide rod is slidably mounted in the guide hole, the bottom of the guide rod is fixedly connected with the top of the sealing cover 12, and the guide rod and the guide hole are arranged to enable the sealing cover 12 to stably slide up and down.

In this embodiment, the number of the air inlets 6 and the air blowing ports 7 is at least four, the air inlets 6 and the air blowing ports 7 are distributed annularly, air enters the sealing cylinder 4 through the air inlets 6, and the fan blades 8 rotate to blow air into the sealing cover 3 through the air blowing ports 7.

Example two

Referring to fig. 1-3, a main shaft sealing device of impulse turbine, including sealed cowling 3, there is casing 1 one side of sealed cowling 3 through bolt fixed mounting, rotate on the casing 1 and install main shaft 2, there is sealed section of thick bamboo 4 sealed cowling 3's opposite side through bolt fixed mounting, the rotation hole has all been seted up on sealed cowling 3 and the sealed section of thick bamboo 4, the outside and the lateral wall sliding connection in two rotation holes of main shaft 2, there are a plurality of flabellums 8 in the outside of main shaft 2 through bolt fixed mounting, a plurality of flabellums 8 all are located sealed section of thick bamboo 4, a plurality of air inlets 6 have been seted up to one side of sealed cowling 4, a plurality of blowing mouths 7 have been seted up to one side of sealed cowling 3, there is sealing washer 5 in the outside of main shaft.

In this embodiment, a fixing plate 10 is fixedly mounted on one side of the housing 1 through a bolt, one end of a spring 11 is fixedly mounted at the bottom of the fixing plate 10 through a bolt, the other end of the spring 11 is fixedly connected with the top of the sealing cover 12, and the sealing cover 12 can be reset through the spring 11.

In this embodiment, during the use, rotation through main shaft 2 drives flabellum 8 and rotates, flabellum 8 rotates and blows in to sealed cowling 3 through blowing mouth 7, make the atmospheric pressure increase in the sealed cowling 3, make the atmospheric pressure in the sealed cowling 3 be greater than the atmospheric pressure in the casing 1, the pressure differential can make water can not ooze in the casing 1, thereby play fine sealed effect, when the atmospheric pressure of sealed cowling 3 is too big, atmospheric pressure can promote sealed 12 rebound of lid and release certain pressure, sealed 12 rebound can extrude spring 11, after the certain volume of pressure release in the sealed cowling 3, make sealed 12 of lid seal 9 again through spring 11 and seal.

The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.

Claims

1. A main shaft sealing device of an impulse turbine comprises a sealing cover (3), a shell (1) is fixedly arranged on one side of the sealing cover (3), a main shaft (2) is rotatably arranged on the shell (1), it is characterized in that a sealing cylinder (4) is fixedly arranged at the other side of the sealing cover (3), rotating holes are respectively arranged on the sealing cover (3) and the sealing cylinder (4), the outer side of the main shaft (2) is connected with the side walls of the two rotating holes in a sliding way, a plurality of fan blades (8) are fixedly arranged on the outer side of the main shaft (2), the fan blades (8) are all positioned in the sealing cylinder (4), a plurality of air inlets (6) are arranged on one side of the sealing cylinder (4), a plurality of air blowing ports (7) are arranged on one side of the sealing cover (3), and a sealing ring (5) is fixedly mounted on the outer side of the main shaft (2), and one side of the sealing ring (5) is matched with the shell (1).

2. The main shaft sealing device of the impulse turbine as claimed in claim 1, wherein an exhaust port (9) is formed at the top of the sealing cover (3), a sealing cover (12) is disposed at the top of the sealing cover (3), and the bottom of the sealing cover (12) covers the top opening of the exhaust port (9).

3. The main shaft sealing device of the impulse turbine as claimed in claim 1, wherein a fixed plate (10) is fixedly installed at one side of the housing (1), one end of a spring (11) is fixedly installed at the bottom of the fixed plate (10), and the other end of the spring (11) is fixedly connected with the top of a sealing cover (12).

4. The main shaft sealing device of the impulse turbine as claimed in claim 3, wherein the fixing plate (10) is provided with a guide hole, a guide rod is slidably installed in the guide hole, and the bottom of the guide rod is fixedly connected with the top of the sealing cover (12).

5. The main shaft sealing device of the impulse turbine as claimed in claim 1, characterized in that the number of said air inlets (6) and said air blow ports (7) is at least four, and a plurality of air inlets (6) and air blow ports (7) are distributed in a ring shape.