CN218376711U

CN218376711U - Self-lubricating sealing structure of through-flow turbine

Info

Publication number: CN218376711U
Application number: CN202221756299.XU
Authority: CN
Inventors: 张云婷
Original assignee: Tianjin Tianfa Heavy Hydropower Equipment Manufacturing Co Ltd
Current assignee: Tianjin Tianfa Heavy Hydropower Equipment Manufacturing Co Ltd
Priority date: 2022-07-07
Filing date: 2022-07-07
Publication date: 2023-01-24
Anticipated expiration: 2032-07-07

Abstract

The utility model discloses a through-flow turbine self-lubricating seal structure relates to hydraulic turbine technical field. The utility model provides a tubular turbine self-lubricating seal structure, includes the main shaft, sets up packing and preceding centrum on the main shaft, sets up the spring closing device in pressure pad water tank one side at the pressure pad water tank setting of packing one side, the cushion case is installed to preceding centrum bottom, broach on the fixedly connected with of cushion case one side, broach under the fixedly connected with of main shaft one side, be provided with the gland on the main shaft, gland one side fixedly connected with sealing ring. The utility model discloses a lower broach of main shaft one side fixed connection, the last broach of connecting on one side of the cushion case, mutually support between gland one side fixed connection's the sealing ring, carry out twice to the main shaft and seal for the water leakage volume to packing department reduces, and the surplus can lubricate the packing, need not quoting extra clean water lubrication packing, and the unit need not dispose water purifier and corresponding complete set's automation component, the cost is reduced.

Description

Self-lubricating sealing structure of through-flow turbine

Technical Field

The utility model relates to a hydraulic turbine technical field specifically is a through-flow turbine self-lubricating seal structure.

Background

The bulb tubular turbine is lower because the less rotational speed of unit water pressure is lower, mostly adopt the packing to seal, the packing seal principle is as shown in figure 1, install the cushion case on the nose cone, the pressure pad water tank compresses tightly the packing through spring closing device, and introduce clean water through the lubricated packing of I-shaped ring through lubricated water pipe, leak and arrange to the sump pit through the drain pipe of water tank lower part, just also through supplying the inside mode of clear pressure water with river course water pressure play unit, maintain the operation of main shaft seal, main shaft seal's effect is that prevent that pressure water from leaking to bulb internal portion through the clearance between rotation and the static part.

However, this kind of mode is lubricated owing to use water, then the unit need dispose corresponding complete set of automation component (clean water subassembly) as shown in fig. 2, clean water subassembly includes flow switch, electromagnetic flowmeter, pressure switch, electric ball valve, water purifier, manometer etc. and the cost is higher, consequently, the utility model provides a novel through-flow turbine self-lubricating seal structure is used for solving the above-mentioned problem of proposing.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a through-flow turbine self-lubricating seal structure to solve the problem that proposes in the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides a tubular turbine self-lubricating seal structure, includes the main shaft, sets up packing and preceding centrum on the main shaft, sets up the spring closing device in pressure pad water tank one side at the pressure pad water tank setting of packing one side, the cushion case is installed to preceding centrum bottom, broach on the fixedly connected with of cushion case one side, broach under the fixedly connected with of main shaft one side, be provided with the gland on the main shaft, gland one side fixedly connected with sealing ring.

Preferably, the upper comb teeth and the lower comb teeth are matched to form a comb tooth sealing mechanism for sealing the main shaft.

Preferably, a plurality of ring grooves are formed in the sealing ring.

Preferably, a main shaft bushing is sleeved on the main shaft and is located between the main shaft and the packing.

Preferably, the lower comb teeth are fixedly connected with the main shaft through threaded bolts.

Preferably, the bottom of the pressure pad water tank is provided with a drain pipe.

Preferably, the packing is located between the pressure pad water tank, the soft pad tank and the main shaft bushing.

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

this through-flow turbine self-lubricating seal structure, lower broach through main shaft one side fixed connection, the last broach of connecting on one side of the cushion case, mutually support between gland one side fixed connection's the sealing ring, seal twice to the main shaft for the water leakage volume to packing department reduces, and the surplus can lubricate the packing, need not quoting extra clean water lubrication packing, the unit need not dispose water purifier and corresponding complete set's automation component, the cost is reduced.

According to the through-flow turbine self-lubricating sealing structure, the main shaft bushing is sleeved on the main shaft, so that the packing can be prevented from wearing the main shaft.

Drawings

FIG. 1 is a general cross-sectional view of the prior art;

FIG. 2 is a flow diagram of a prior art clean water assembly;

fig. 3 is a cross-sectional view of the present invention;

fig. 4 is an enlarged view of a portion a of fig. 1 according to the present invention;

fig. 5 is an enlarged view of a portion B in fig. 2 according to the present invention.

In the figure: 1. a main shaft; 101. a threaded bolt; 2. a main shaft bushing; 3. an anterior vertebral body; 4. a cushion box; 5. a pressure pad water tank; 6. a spring hold down; 7. packing; 8. a gland; 9. a seal ring; 901. a ring groove; 10. comb teeth are arranged; 1001. a first card cavity; 11. lower comb teeth; 1101. a second card cavity; 12. a drain pipe; 13. an I-shaped ring; 14. lubricating the water pipe; 15. cleaning the water assembly.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the 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. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

It should be noted that, in the description of the present invention, the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate the orientation or positional relationship indicated based on the drawings, which is only for convenience of description of the present invention and simplification of description, and do not indicate or imply that the device or element referred to must have a specific orientation, be configured and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

Further, it will be appreciated that the dimensions of the various elements shown in the figures are not drawn to scale, for ease of description, and that the thickness or width of some layers may be exaggerated relative to other layers, for example.

It should be noted that like reference numerals and letters refer to like items in the following figures, and thus, once an item is defined or illustrated in one of the figures, it will not need to be further discussed or illustrated in detail in the description of the figures that follows.

As shown in fig. 1-3, the utility model provides a technical solution: the utility model provides a through-flow turbine self-lubricating seal structure, including main shaft 1, set up packing 7 and preceding centrum 3 on main shaft 1, the setting sets up the spring hold-down device 6 in 5 one sides of pressure pad water tank 5 at the pressure pad water tank 5 of packing 7 one side, cushion case 4 is installed to 3 bottoms of preceding centrum, comb tooth 10 is gone up to cushion case 4 one side fixedly connected with, comb tooth 11 under 1 one side fixedly connected with of main shaft, be provided with gland 8 on the

main shaft

1, 8 one side fixedly connected with sealing ring 9 of gland.

As a specific example, the upper comb teeth 10 and the lower comb teeth 11 are adapted to form a comb tooth sealing mechanism for sealing the main shaft 1.

As a specific embodiment, a plurality of ring grooves 901 are formed inside the sealing ring 9. It will be appreciated that the seal ring 9 forms a labyrinth seal by cooperating with the spindle bush 2 for sealing the spindle 1.

As a specific embodiment, a main shaft bushing 2 is sleeved on the main shaft 1, and the main shaft bushing 2 is located between the main shaft 1 and the packing 7. It should be noted that, in order to prevent the packing 7 from wearing the main shaft 1, the main shaft 1 is provided with the main shaft bushing 2 for protecting the main shaft 1, and the main shaft bushing 2 can be made of stainless steel with excellent corrosion resistance, formability and toughness, so that the main shaft bushing 2 has a longer service life.

As a specific example, the lower comb teeth 11 are fixedly connected to the main shaft 1 by a threaded bolt 101. The lower comb teeth 11 are fixed through the threaded bolts 101, so that the lower comb teeth 11 can be conveniently detached and replaced.

As a specific example, the bottom of the pressure pad water tank 5 is provided with a drain pipe 12. It should be noted that the drain pipe 12 is used to drain the residual water after lubricating the packing 7.

As a specific example, the packing 7 is located between the pressure pad water tank 5, the cushion pad tank 4, and the spindle bushing 2.

Specifically, through the upper comb tooth 11 of the upper fixed connection of main shaft 1 and the upper comb tooth 10 of the one side fixed connection of gland 8 cooperate, form first sealing, the sealing ring 9 of seting up a plurality of annuluses 901 through the one side fixed connection of gland 8 carries out the second time sealing to main shaft 1, through these twice seals, make the pressure of leaking descend by a wide margin, the volume of leaking water to packing 7 department can show and reduce, adopt the self-lubricating sealing form through the lubricated packing 7 that leaks, no longer need additionally quote clean water lubricated packing 7, all the other leaks then arrange to the sump pit through the drain pipe 12 of pressure pad water tank 5 bottom, it is here need to know, pressure pad water tank 5 compresses tightly packing 7 through spring closing device 6, help sealing main shaft 1.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a through-flow turbine self-lubricating seal structure, includes main shaft (1), sets up packing (7) and preceding centrum (3) on main shaft (1), sets up spring closing device (6) that set up in pressure pad water tank (5) one side in pressure pad water tank (5) of packing (7) one side, its characterized in that: preceding centrum (3) bottom is installed cushion case (4), comb tooth (10) are gone up to cushion case (4) one side fixedly connected with, and main shaft (1) one side fixedly connected with is comb tooth (11) down, is provided with gland (8) on main shaft (1), and gland (8) one side fixedly connected with sealing ring (9).

2. A self-lubricating sealing structure of a through-flow turbine according to claim 1, characterized in that: the upper comb teeth (10) are matched with the lower comb teeth (11) to form a comb tooth sealing assembly for sealing the main shaft (1).

3. A self-lubricating sealing structure of a through-flow turbine according to claim 1, characterized in that: a plurality of ring grooves (901) are formed in the sealing ring (9).

4. A through-flow turbine self-lubricating seal structure according to claim 1, characterized in that: the packing is characterized in that a main shaft bushing (2) is sleeved on the main shaft (1), and the main shaft bushing (2) is located between the main shaft (1) and the packing (7).

5. A self-lubricating sealing structure of a through-flow turbine according to claim 1, characterized in that: the lower comb teeth (11) are fixedly connected with the main shaft (1) through threaded bolts (101).

6. A self-lubricating sealing structure of a through-flow turbine according to claim 1, characterized in that: and a drain pipe (12) is arranged at the bottom of the pressure pad water tank (5).

7. The self-lubricating sealing structure of the through-flow turbine as claimed in claim 4, wherein: and the packing (7) is positioned among the pressure pad water tank (5), the soft pad box (4) and the spindle bushing (2).