CN212985439U

CN212985439U - Hydraulic turbine main shaft bearing structure

Info

Publication number: CN212985439U
Application number: CN202021410413.4U
Authority: CN
Inventors: 唐杰天; 刘渝奇
Original assignee: Chongqing Water Turbine Works Co Ltd
Current assignee: Chongqing Water Turbine Works Co Ltd
Priority date: 2020-07-17
Filing date: 2020-07-17
Publication date: 2021-04-16
Anticipated expiration: 2030-07-17

Abstract

The utility model discloses a hydraulic turbine main shaft bearing structure, include: the supporting beam is fixedly arranged on a bearing seat on a main shaft of the water turbine through a first fixing piece; the upper end of the support ring is clamped with the main shaft of the water turbine, and the lower end of the support ring is fixedly connected with the support beam through a second fixing piece; wherein the support ring comprises a plurality of segmental arcs, the segmental arc is divided into joint portion and supporting part and connecting portion, joint portion is located the supporting part top, and the card is established in the ring groove on the hydraulic turbine main shaft lateral wall, connecting portion are located the supporting part below, and just through second mounting and a supporting beam fixed connection. The utility model discloses a set up corresponding bearing structure, demolish the coupling bolt and hang out generator rotor and just can overhaul, supporting beam and support ring bear the weight of hydraulic turbine main shaft and runner this moment.

Description

Hydraulic turbine main shaft bearing structure

Technical Field

The utility model belongs to the technical field of the hydraulic turbine overhauls, concretely relates to hydraulic turbine main shaft bearing structure.

Background

The main shaft of the water turbine is one of important parts of the water turbine generator set, and the main shaft of the water turbine is connected with a generator rotor and used for bearing the weight of a rotating part of the water turbine and transmitting torque. When the unit is in operation due to failure or periodic maintenance, parts such as a generator rotor and a guide bearing are probably to be detached for maintenance, and at the moment, because a main shaft of the water turbine is suspended, the main shaft of the water turbine needs to be lifted out together with the generator rotor or the water turbine falls onto a water layer maintenance platform. If the generator rotor is hoisted out together, the plant needs to have enough design height, and the cost is increased due to too high plant design, so that the economy is not realized. If the main shaft of the water turbine is placed on the water layer maintenance platform, enough space is needed, the maintenance platform is needed to have enough strength and rigidity to support the weight of the main shaft and the rotating wheel, and a special hoisting tool is needed to be arranged. Therefore, a simple and practical water turbine main shaft supporting structure needs to be designed, and the supporting function is achieved to avoid the water turbine main shaft from being in a suspended state.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving among the prior art hydroelectric set and overhauing the time, the hydraulic turbine main shaft is in the shortcoming that unsettled state need be hung out along with generator rotor, and the hydraulic turbine main shaft bearing structure who provides.

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

a water turbine main shaft support structure comprising:

the supporting beam is fixedly arranged on a bearing seat on a main shaft of the water turbine through a first fixing piece;

the upper end of the support ring is clamped with the main shaft of the water turbine, and the lower end of the support ring is fixedly connected with the support beam through a second fixing piece;

wherein the support ring comprises a plurality of segmental arcs, the segmental arc is divided into joint portion and supporting part and connecting portion, joint portion is located the supporting part top, and the card is established in the ring groove on the hydraulic turbine main shaft lateral wall, connecting portion are located the supporting part below, and just through second mounting and a supporting beam fixed connection.

Preferably, the end part of the arc-shaped section is integrally provided with a connecting plate, the connecting plate is perpendicular to the arc-shaped section, and the connecting plates on two adjacent arc-shaped sections are fixedly connected through a third fixing piece.

Preferably, the third fixing part is a U-shaped fixing plate and is reversely buckled on two adjacent connecting plates through a U-shaped groove, fixing lugs are integrally arranged at two ends of the fixing plate, and the fixing lugs are fixedly connected with the connecting parts through the second fixing part.

Preferably, the side wall of the U-shaped groove in the fixing plate is obliquely arranged, and two adjacent connecting plates are obliquely arranged on the side away from each other and are parallel to the side wall of the U-shaped groove, and the included angle between the connecting plates and the vertical plane is less than 10 degrees.

Preferably, the first fixing piece and the second fixing piece are both provided with bolts, the supporting beam is provided with screw holes matched with the bolts, and the connecting part and the fixing lugs are also provided with screw holes matched with the bolts.

Preferably, the clamping portion, the supporting portion and the connecting portion are integrally formed.

Compared with the prior art, the utility model discloses beneficial effect is: hydroelectric set is when overhauing, brake high pressure jack-up generator rotor for through the power station brake, then a plurality of for a supporting beam first mounting and hydraulic turbine bearing frame fixed connection, pass through second mounting and a supporting beam fixed connection to a plurality of segmental arcs again, a plurality of segmental arcs piece into complete joint ring cover and establish on the hydraulic turbine main shaft, it hangs out generator rotor and just can overhaul to demolish the shaft coupling bolt, supporting beam and support ring bear the weight of hydraulic turbine main shaft and runner this moment.

Drawings

Fig. 1 is a schematic side view of a main shaft supporting structure of a water turbine according to the present invention;

FIG. 2 is an enlarged view of the structure at A in FIG. 1;

fig. 3 is a schematic top view of a main shaft supporting structure of a water turbine provided by the present invention;

fig. 4 is the utility model provides an adjacent segmental arc structure sketch map of a hydraulic turbine main shaft bearing structure.

In the figure: the hydraulic turbine comprises a main shaft of a hydraulic turbine 1, a bearing seat 2, a supporting beam 3, a supporting ring 4, a first fixing piece 5, a second fixing piece 6, a clamping part 7, a connecting part 8, a supporting part 9, an arc section 10, a connecting plate 11, a fixing plate 12 and a fixing lug 13.

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.

Referring to fig. 1 to 4, a supporting structure of a main shaft 1 of a water turbine includes:

the supporting beam 3 is fixedly arranged on a bearing seat 2 on a main shaft 1 of the water turbine through a first fixing piece 5;

the upper end of the support ring 4 is clamped with the main shaft 1 of the water turbine, and the lower end of the support ring 4 is fixedly connected with the support beam 3 through a second fixing piece 6;

the support ring 4 is composed of a plurality of arc-shaped sections 10, each arc-shaped section 10 is divided into a clamping portion 7, a supporting portion 9 and a connecting portion 8, the clamping portion 7 is located above the supporting portion 9 and clamped in an annular clamping groove in the side wall of the main shaft 1 of the water turbine, and the connecting portion 8 is located below the supporting portion 9 and fixedly connected with the support beam 3 through a second fixing piece 6;

in the embodiment of the technical scheme in application, when the water-turbine generator set is overhauled, the generator rotor is jacked up at high pressure through the brake for braking the power station, then fixedly connecting a plurality of supporting beams 3 with a water turbine bearing seat 2 by using a first fixing piece 5, fixedly connecting a plurality of arc-shaped sections 10 with the supporting beams 3 by using a second fixing piece 6, splicing the plurality of arc-shaped sections 10 into a complete clamping ring sleeved on a water turbine main shaft 1, clamping parts 7 on the arc-shaped sections 10 are clamped in annular clamping grooves on the water turbine main shaft 1, and then the gravity of the main shaft 1 of the water turbine is transmitted to the bearing seat 2 through the support ring 4 and the support beam 3, thereby play the effect of supporting hydraulic turbine main shaft 1, avoid it to be in unsettled state for demolising the coupling bolt and hang out the generator rotor and just can overhaul, supporting beam 3 and support ring 4 bear the weight of hydraulic turbine main shaft 1 and runner this moment.

According to the preferable technical scheme in the embodiment, the end parts of the arc sections 10 are integrally provided with the connecting plates 11, the connecting plates 11 are perpendicular to the arc sections 10, the connecting plates 11 on two adjacent arc sections 10 are fixedly connected through a third fixing piece, and the two adjacent arc sections 10 are fixedly connected, so that the whole support ring 4 is more stable; preferably, the third fixing part is a U-shaped fixing plate 12 and is reversely buckled on the two adjacent connecting plates 11 through a U-shaped groove, fixing lugs 13 are integrally arranged at two ends of the fixing plate 12, the fixing lugs 13 are fixedly connected with the connecting parts 8 through the second fixing part 6, and the fixing lugs 13, the connecting parts 8 and the supporting beam 3 are fixedly connected through the second fixing part 6, so that the integral stability of the supporting structure is ensured, the using number of the fixing parts is reduced, and a user can conveniently and efficiently disassemble and assemble the supporting structure; further preferably, the lateral wall slope setting of the U-shaped groove in the fixed plate 12, two adjacent connecting plates 11 also slope the setting and are parallel with U-shaped groove lateral wall in the one side of keeping away from each other, and be less than 10 with the contained angle between the perpendicular, when this design makes fixed plate 12 back-off, U-shaped groove lateral wall offsets with connecting plate 11 lateral wall in close contact with, has the fixed effect that presss from both sides tightly, and then makes the connection between two segmental arcs 10 inseparabler stable.

According to the preferable technical scheme in the embodiment, the first fixing piece 5 and the second fixing piece 6 are both provided with bolts, the supporting beam 3 is provided with screw holes matched with the bolts, the connecting part 8 and the fixing lug 13 are also provided with screw holes matched with the bolts, and the bolts are adopted for realizing connection, so that the stability is ensured and the dismounting is also realized; be integrated into one piece between joint portion 7 and supporting part 9 and the connecting portion 8, the holistic stability of segmental arc 10 has been guaranteed in integrative design.

Claims

1. A water turbine main shaft support structure, characterized in that the support structure comprises:

the supporting beam (3) is fixedly arranged on a bearing seat (2) on a main shaft (1) of the water turbine through a first fixing piece (5);

the upper end of the support ring (4) is clamped with the main shaft (1) of the water turbine, and the lower end of the support ring (4) is fixedly connected with the support beam (3) through a second fixing piece (6);

wherein, support ring (4) comprises a plurality of segmental arcs (10), segmental arc (10) are divided into joint portion (7) and supporting part (9) and connecting portion (8), joint portion (7) are located supporting part (9) top, and the card is established in the ring groove on hydraulic turbine main shaft (1) lateral wall, connecting portion (8) are located supporting part (9) below, and through second mounting (6) and supporting beam (3) fixed connection.

2. The water turbine main shaft supporting structure is characterized in that the end part of the arc-shaped section (10) is integrally provided with a connecting plate (11), the connecting plate (11) is perpendicular to the arc-shaped section (10), and the connecting plates (11) on two adjacent arc-shaped sections (10) are fixedly connected through a third fixing piece.

3. The water turbine main shaft supporting structure according to claim 2, wherein the third fixing member is a U-shaped fixing plate (12) and is reversely buckled on two adjacent connecting plates (11) through a U-shaped groove, fixing lugs (13) are integrally arranged at two ends of the fixing plate (12), and the fixing lugs (13) are fixedly connected with the connecting parts (8) through second fixing members (6).

4. The water turbine main shaft supporting structure according to claim 3, wherein the side walls of the U-shaped groove in the fixing plate (12) are obliquely arranged, and the sides of the adjacent two connecting plates (11) far away from each other are also obliquely arranged and parallel to the side walls of the U-shaped groove, and the included angle between the side walls and the vertical plane is less than 10 degrees.

5. The water turbine main shaft supporting structure according to claim 3, wherein the first fixing member (5) and the second fixing member (6) are both provided with bolts, the supporting beam (3) is provided with screw holes for matching the bolts, and the connecting portion (8) and the fixing lug (13) are also provided with screw holes for matching the bolts.

6. The water turbine main shaft support structure according to claim 1, wherein the clamping portion (7) and the support portion (9) and the connecting portion (8) are integrally formed.