CN216278021U

CN216278021U - Back pressure steam turbine

Info

Publication number: CN216278021U
Application number: CN202122759753.9U
Authority: CN
Inventors: 夏璐
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-11-10
Filing date: 2021-11-10
Publication date: 2022-04-12
Anticipated expiration: 2031-11-10

Abstract

The utility model discloses a back pressure type steam turbine, which comprises an upper impeller plate and a lower impeller plate, wherein the inner wall of the upper impeller plate is fixedly connected with a first half shaft sleeve through a plurality of first inner blades, the inner wall of the lower impeller plate is fixedly connected with a second plate shaft sleeve through a plurality of second inner blades, and the outer walls of the upper impeller plate and the lower impeller plate are respectively provided with a plurality of rotating blades.

Description

Back pressure steam turbine

Technical Field

The utility model relates to the technical field of steam turbines, in particular to a back pressure steam turbine.

Background

A turbine having a discharge pressure greater than atmospheric pressure is referred to as a back pressure turbine. The exhausted steam can be used for supplying heat or supplying original medium-pressure and low-pressure turbines to replace medium-pressure and low-pressure boilers of old power plants. When the back pressure turbine is used for supplying the original medium and low pressure turbines to replace medium and low pressure boilers of an old power plant, the back pressure turbine is also called a front-mounted turbine, so that the power generation capacity of the original power plant can be increased, and the heat economy of the original power plant can be improved. The design value of the exhaust steam pressure of the back pressure turbine for heat supply is determined according to different heat supply purposes; the back pressure of the front-mounted steam turbine is usually more than 5 MPa, and depends on the steam parameters of the original unit. The exhaust steam is condensed into water after being utilized in the heat supply system, and then is sent back to the boiler by a water pump to be used as feed water. The condensed water of a common heating system can not be completely recycled, and the water needs to be supplemented.

The impeller is important part among the backpressure steam turbine, and discovery in using of current backpressure steam turbine impeller structure, easy emergence wearing and tearing after the impeller body work longer time need be changed the impeller body, and is comparatively difficult with the dismantlement to the installation of impeller body, leads to its convenience of use relatively poor, for this reason, we propose backpressure steam turbine.

SUMMERY OF THE UTILITY MODEL

The present invention is directed to a back pressure turbine to solve the problems set forth above.

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

the back pressure steam turbine comprises an upper impeller plate and a lower impeller plate, wherein the inner wall of the upper impeller plate is fixedly connected with a first half shaft sleeve through a plurality of first inner blades, the inner wall of the lower impeller plate is fixedly connected with a second plate shaft sleeve through a plurality of second inner blades, the outer walls of the upper impeller plate and the lower impeller plate are both provided with a plurality of rotating blades, the left and right sides of the front side surface and the left and right sides of the rear side surface of the upper impeller plate are fixedly welded with first mounting blocks, the left and right sides of the front side surface and the left and right sides of the rear side surface of the lower impeller plate are fixedly welded with second mounting blocks, a first locking bolt is threaded between the corresponding first mounting block and the second mounting block, first semi-annular reinforcing plates are fixedly welded on the front side and the rear side of the outer surface of the first inner blade, the outer surface front and back sides of the second inner blade are fixedly welded with second semi-annular reinforcing plates, and a plurality of mounting holes are formed in the outer wall of the first semi-shaft sleeve and the outer wall of the second semi-shaft sleeve.

Preferably, first clamping grooves are formed in the two bottom end portions of the upper impeller plate, first clamping blocks are fixedly connected to the two top end portions of the lower impeller plate, and the first clamping blocks are clamped inside the first clamping grooves.

Preferably, the first semi-annular reinforcing half is fixedly connected with a second clamping block at two bottom end parts, the second clamping groove is formed in two top end parts of the second semi-annular reinforcing plate, and the second clamping block is clamped in the second clamping groove.

Preferably, the first latch segment of the right-hand left and right-hand left fixed welding of the leading flank of first semi-annular reinforcing plate and trailing flank, the second latch segment of the right-hand left and right left fixed welding of the leading flank of second semi-annular reinforcing plate and trailing flank, the second locking bolt is worn to be equipped with by the screw thread between the first latch segment that corresponds and the second latch segment.

Preferably, one side of the outer surface of the rotating blade is fixedly connected with a positioning block, and the positioning block is fixedly connected to the outer wall of the upper impeller plate or the outer wall of the lower impeller plate through a plurality of screws.

Preferably, the upper impeller plate is matched with the lower impeller plate, the first semicircular reinforcing plate is matched with the second semicircular reinforcing plate, and the first half shaft sleeve is matched with the second half shaft sleeve.

Compared with the prior art, the utility model has the beneficial effects that: the back pressure type steam turbine is convenient to use and disassemble, when the back pressure type steam turbine is used, the first half shaft sleeve and the second half shaft sleeve are sleeved on a rotating shaft of the steam turbine and are locked with the rotating shaft through the mounting holes, then the first locking bolts are screwed into the space between the first mounting block and the second mounting block in a threaded mode, the impeller is assembled, the back pressure type steam turbine is convenient to use, and the structural strength of the impeller can be improved through the arranged first annular reinforcing plate and the second half annular reinforcing plate; the first clamping block is in clamping fit with the first clamping groove, and the second clamping groove is in clamping fit with the second clamping block, so that preliminary positioning can be conveniently carried out when the upper impeller plate and the lower impeller plate are assembled; the second locking bolt, the first locking block and the second locking block are matched, so that the connection strength of the impeller can be improved again; the positioning block can facilitate the replacement of a single rotor blade by personnel.

Drawings

FIG. 1 is a schematic front view of a main structure of a back pressure turbine;

fig. 2 is a sectional view of a back pressure turbine with a split main body.

In the figure: 1-lower impeller plate, 2-second mounting block, 3-first locking bolt, 4-first mounting block, 5-first inner blade, 6-first semi-annular reinforcing plate, 7-upper impeller plate, 8-first semi-shaft sleeve, 9-rotating blade, 10-positioning block, 11-screw, 12-first locking block, 13-second locking bolt, 14-second locking block, 15-second inner blade, 16-second semi-shaft sleeve, 17-second semi-annular reinforcing plate, 18-second clamping groove, 19-second clamping block, 20-second clamping groove, 21-second clamping block and 22-mounting hole.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-2, the present invention provides a technical solution: the back pressure type steam turbine comprises an upper impeller plate 7 and a lower impeller plate 1, wherein the inner wall of the upper impeller plate 7 is fixedly connected with a first semi-annular sleeve 8 through a plurality of first inner blades 5, the inner wall of the lower impeller plate 1 is fixedly connected with a second plate sleeve 16 through a plurality of second inner blades 15, a plurality of rotating blades 9 are arranged on the outer walls of the upper impeller plate 7 and the lower impeller plate 1, first mounting blocks 4 are fixedly welded on the left and right sides of the front side and the left and right sides of the rear side of the upper impeller plate 7, second mounting blocks 2 are fixedly welded on the left and right sides of the front side and the left and right sides of the rear side of the lower impeller plate 1, first locking bolts 3 are arranged between the corresponding first mounting blocks 4 and the second mounting blocks 2 in a threaded manner, first semi-annular reinforcing plates 6 are fixedly welded on the front and rear sides of the outer surface of the first inner blades 5, second semi-annular reinforcing plates 17 are fixedly welded on the front and rear sides of the outer surface of the second inner blades 15, and a plurality of mounting holes 8 are formed in the outer wall of the first half shaft sleeve 8 and the outer wall of the second half shaft sleeve 16.

During the installation, establish first semi-axis cover 8 and second semi-axis cover 16 all in the pivot of steam turbine to all lock through mounting hole 8 and pivot, later with 3 screw precessions of a plurality of first locking bolt between first installation piece 4 and the second installation piece 2, and then realize this impeller and assemble, convenient to use, the first annular reinforcing plate 6 and the second semi-annular reinforcing plate 17 of setting can improve the structural strength of this impeller.

First clamping grooves 20 are formed in two bottom end portions of the upper impeller plate 7, first clamping blocks 21 are fixedly connected to two top end portions of the lower impeller plate 1, and the first clamping blocks 21 are clamped inside the first clamping grooves 20.

Through the clamping fit of the first clamping block 21 and the first clamping groove 20, the preliminary positioning can be conveniently carried out when the upper impeller plate 7 and the lower impeller plate 1 are assembled.

Two bottom end parts of the first semi-annular reinforcing half 6 are fixedly connected with second clamping blocks 19, two top end parts of the second semi-annular reinforcing plate 17 are provided with second clamping grooves 18, and the second clamping blocks 19 are clamped inside the second clamping grooves 18.

Through the cooperation of second draw-in groove 18 and the joint of second fixture block 19, can improve this impeller's joint strength.

The right-hand and the right-hand first latch segment 12 of the equal fixed welding in the left-hand side of trailing flank of leading flank of first semi-annular reinforcing plate 6, the right-hand and the right-hand all fixed welding in the left-hand side of leading flank of second semi-annular reinforcing plate 17 has second latch segment 14, and second locking bolt 13 is worn to be equipped with to the screw thread between corresponding first latch segment 12 and the second latch segment 14.

Through the cooperation of second locking bolt 13, first latch segment 12 and second latch segment 14, can be convenient for improve the joint strength of this impeller once more.

One side of the outer surface of the rotating blade 9 is fixedly connected with a positioning block 10, and the positioning block 10 is fixedly connected with the outer wall of the upper impeller plate 7 or the outer wall of the lower impeller plate 1 through a plurality of screws 11.

The individual rotor blades 9 can be easily replaced by personnel by means of the positioning blocks 10.

The upper impeller plate 7 is matched with the lower impeller plate 1, the first semicircular reinforcing plate 6 is matched with the second semicircular reinforcing plate 17, and the first half shaft sleeve 8 is matched with the second half shaft sleeve 16.

It will be evident to those skilled in the art that the utility model is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims

1. Back pressure steam turbine, including last impeller board (7) and lower impeller board (1), its characterized in that: the inner wall of the upper impeller plate (7) is fixedly connected with a first half shaft sleeve (8) through a plurality of first inner blades (5), the inner wall of the lower impeller plate (1) is fixedly connected with a second plate shaft sleeve (16) through a plurality of second inner blades (15), the outer walls of the upper impeller plate (7) and the lower impeller plate (1) are respectively provided with a plurality of rotating blades (9), first installation blocks (4) are fixedly welded on the left side and the right side of the front side and the left side and the right side of the rear side of the upper impeller plate (7), second installation blocks (2) are fixedly welded on the left side and the right side of the front side and the left side and the right side of the rear side of the lower impeller plate (1), first locking bolts (3) are penetrated through threads between the corresponding first installation blocks (4) and the second installation blocks (2), and first semi-annular reinforcing plates (6) are fixedly welded on the front side and rear side of the outer surface of the first inner blades (5), the outer surface front and back sides of the second inner blade (15) are fixedly welded with second semicircular reinforcing plates (17), and a plurality of mounting holes (22) are formed in the outer wall of the first semicircular sleeve (8) and the outer wall of the second semicircular sleeve (16).

2. The back pressure turbine as claimed in claim 1, wherein: first clamping grooves (20) are formed in two bottom end portions of the upper impeller plate (7), first clamping blocks (21) are fixedly connected to two top end portions of the lower impeller plate (1), and the first clamping blocks (21) are clamped inside the first clamping grooves (20).

3. The back pressure turbine as claimed in claim 2, wherein: two bottom end portions of the first semi-annular reinforcing half (6) are fixedly connected with second clamping blocks (19), two top end portions of the second semi-annular reinforcing plate (17) are provided with second clamping grooves (18), and the second clamping blocks (19) are clamped inside the second clamping grooves (18).

4. The back pressure turbine as claimed in claim 3, wherein: the left and right sides of the leading flank of first semicircular reinforcing plate (6) and the left and right sides of trailing flank all fixed weld first latch segment (12), the left and right sides of the leading flank of second semicircular reinforcing plate (17) and the left and right sides of trailing flank all fixed weld have second latch segment (14), and second locking bolt (13) are worn to be equipped with to the screw thread between first latch segment (12) that correspond and second latch segment (14).

5. The back pressure turbine as claimed in claim 4, wherein: one side of the outer surface of the rotating blade (9) is fixedly connected with a positioning block (10), and the positioning block (10) is fixedly connected with the outer wall of the upper impeller plate (7) or the outer wall of the lower impeller plate (1) through a plurality of screws (11).

6. The back pressure turbine as claimed in claim 5, wherein: the upper impeller plate (7) is matched with the lower impeller plate (1), the first semicircular reinforcing plate (6) is matched with the second semicircular reinforcing plate (17), and the first semicircular sleeve (8) is matched with the second semicircular sleeve (16).