CN220980317U

CN220980317U - Main shaft sealing device of water turbine

Info

Publication number: CN220980317U
Application number: CN202323154165.8U
Authority: CN
Inventors: 孙东明
Original assignee: Hangzhou Kangpeng Machinery Manufacturing Co ltd
Current assignee: Hangzhou Kangpeng Machinery Manufacturing Co ltd
Priority date: 2023-11-22
Filing date: 2023-11-22
Publication date: 2024-05-17
Anticipated expiration: 2033-11-22

Abstract

The utility model discloses a main shaft sealing device of a water turbine, and aims to provide the main shaft sealing device of the water turbine, which is convenient to assemble and operate and improves the tightness. The packing box comprises a main shaft body, a pressing ring and a packing box, wherein the pressing ring and the packing box are sleeved with the main shaft body, the upper end of the pressing ring is rotationally connected with a pressing mechanism, the lower end of the pressing ring is connected with the packing box, a cavity between the pressing ring and the packing box is formed into a packing groove, a packing ring and a pressing body are arranged in the packing groove, the pressing body is in sliding connection with the outer side face of the packing ring through the pressing mechanism, the inner side face of the packing ring is in compression connection with the surface of the main shaft body through the pressing body, and the pressing ring is connected with the packing box in a disassembling mode. The beneficial effects of the utility model are as follows: the device realizes high tightness; the operation is simplified, and the operation convenience is improved; the assembly is convenient; the structure connection strength is improved; the structure operation is improved; high tightness, simple and quick operation.

Description

Main shaft sealing device of water turbine

Technical Field

The utility model relates to the technical field of water turbines, in particular to a main shaft sealing device of a water turbine.

Background

The water turbine runner leak-proof ring can generate a small amount of water leakage, and the water leakage can enter a machine pit along a gap between the main shaft and the fixed part to prevent other equipment from operating normally, so that a leak-proof sealing device is arranged on the main shaft. The central position of the shell of the water turbine is provided with a shaft hole, a main shaft is inserted in the shaft hole, the main shaft is sealed through a packing ring, but the packing ring and the main shaft have poor tightness, so that the water sealing effect is common, and water still can seep out from the gap between the packing and the main shaft.

Chinese patent grant bulletin number: CN 210422856U, the date of the grant publication 2020, 04 and 28, the utility model relates to a main shaft sealing structure of a water turbine, which comprises a water turbine shell body, a shaft hole arranged at the center of the water turbine shell body, a main shaft inserted in the shaft hole, an embedded groove arranged on the water turbine shell body and positioned at the upper side of the shaft hole, and a sealing ring arranged in the embedded groove, wherein a packing groove is arranged on the water turbine shell body and positioned at the upper side of the embedded groove, a water sealing packing is arranged in the packing groove, and a filler is filled in the packing groove and positioned on the upper surface of the water sealing packing. The technical scheme has the following defects: the packing ring is complex in operation in the packing process, nuts need to be screwed one by one when being fixed, assembly and sealing operation are complex, and the packing side face is not tightly pressed enough, so that the tightness is not enough.

In summary, the assembly and sealing operations of the device are complex and the sealing performance is low.

Disclosure of utility model

The utility model provides a main shaft sealing device of a water turbine, which is convenient to assemble and operate and improves the sealing performance, and aims to overcome the defects of complex assembly and sealing operation and low sealing performance of devices in the prior art.

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

The utility model provides a hydraulic turbine main shaft sealing device, including the main shaft body, clamping ring and packing box cup joint with the main shaft body, the clamping ring upper end rotates and is connected with swager structure, the lower extreme of clamping ring is connected with the packing box, cavity between clamping ring and the packing box is established to form the packing groove, be equipped with filler ring and swager body in the packing groove, swager body passes through swager structure and the lateral surface sliding connection of filler ring, the medial surface of filler ring passes through the surface crimping of swager body and main shaft body, the clamping ring is dismantled with the packing box and is connected.

The clamping ring and the stuffing box are both sleeved on the main shaft body, the stuffing ring is arranged in an inner cavity formed by the clamping ring, the stuffing box and the main shaft body and sleeved on the main shaft body, meanwhile, the clamping ring is provided with a material pressing body and a material pressing mechanism, the material pressing body rotates on the clamping ring through the material pressing mechanism and then slides on the outer side face of the stuffing ring in a vertical displacement manner, the stuffing ring slides on the lateral displacement manner through the material pressing body, the sealing strength is improved, the operation is simple and convenient, and in addition, the clamping ring is connected with the stuffing box in a detachable manner so as to facilitate the assembly of the stuffing ring on the main shaft body. The effects of realizing high tightness, simplifying operation, improving operation convenience and facilitating assembly are achieved.

Preferably, the pressing ring is provided with a sliding groove, the pressing body is provided with a limiting groove, the limiting grooves are provided with two pressing blocks which are arranged in a relative mode, one side groove wall of each limiting groove is provided with a pressing inclined surface, the pressing mechanism comprises a sliding block and a connecting rod, the connecting rod is connected with the sliding groove in a sliding mode, one end of the connecting rod is connected with the pressing block, the other end of the connecting rod is connected with the sliding block, the pressing blocks are connected with the pressing inclined surfaces in a sliding mode through the sliding blocks, and the sliding directions of the two sliding blocks are opposite to each other. The limiting groove on the pressing body is internally provided with the pressing block, and the pressing block can move along the downward pressing inclined plane under the reverse rotation of the two sliding blocks through the connection of the sliding blocks and the connecting rod, and the pressing body is jacked into the space between the packing ring and the pressing ring so as to enable the packing ring to be extruded to improve the tightness, so that the effect of realizing high tightness and simultaneously being simple and rapid to operate is achieved.

Preferably, the opposite surfaces of the pressing ring and the packing ring are both of stepped cross sections, a first guide inclined surface is arranged at the joint of the adjacent joint surfaces of the stepped surfaces of the pressing ring, and the pressing ring is in sliding connection with the first guide inclined surface. The whole opposite surfaces of the pressing ring and the packing ring are matched stepped surfaces so as to form multistage pressing on the packing ring with the pressing ring, and meanwhile, the guide inclined plane is matched to improve the effect of smoothness of the pressing ring entering and pressing the packing ring.

Preferably, the sliding block is provided with a plurality of anti-skid grooves. The anti-slip groove improves friction force and prevents the sliding block from slipping when rotating, so that the effect of improving the structural operation smoothness is achieved.

Preferably, a limit groove is formed in the inner wall of the packing ring, an auxiliary packing ring is arranged on the limit groove, and the auxiliary packing ring is sleeved with the main shaft body. The inner wall of the packing ring is embedded with an auxiliary packing ring through the limiting groove, so that energy is consumed through the bent channel, and the sealing effect of the structure is further improved.

Preferably, the compression ring is connected with a mounting block, the stuffing box is provided with a connecting groove and a movable groove, the mounting block is connected with the connecting groove in an inserting mode, the mounting block is provided with an inserting groove, a spring mechanism is arranged in the movable groove, one end of the spring mechanism is connected with the movable groove, the other end of the spring mechanism is connected with an inserting block, a second guiding inclined surface is arranged on the inserting block, and the inserting block is connected with the inserting groove in an inserting mode through the second guiding inclined surface. The clamping ring enters the stuffing box through the mounting block and is connected with the inserting block, so that the connection integrity of the clamping ring and the stuffing box is enhanced, and the effect of improving the structural connection strength is achieved.

The beneficial effects of the utility model are as follows: the device realizes high tightness; the operation is simplified, and the operation convenience is improved; the assembly is convenient; the structure connection strength is improved; the structure operation is improved; high tightness, simple and quick operation.

Drawings

FIG. 1 is a perspective view of the present utility model;

FIG. 2 is a top view of FIG. 1;

FIG. 3 is a cross-sectional view of FIG. 1;

fig. 4 is a cross-sectional view of the connection of the press block with the limit groove.

In the figure: 1. the main shaft body, 2, the clamping ring, 3, the stuffing box, 4, the material pressing mechanism, 5, the stuffing groove, 6, the stuffing ring, 7, the material pressing body, 8, the sliding groove, 9, the limit groove, 10, the pressing block, 11, the downward inclined surface, 12, the sliding block, 13, the connecting rod, 14, the first guide inclined surface, 15, the anti-sliding groove, 16, the limit groove, 17, the mounting block, 18, the connecting groove, 19, the movable groove, 20, the slot, 21, the spring mechanism, 22, the inserting block, 23, the second guide inclined surface and 24, and the auxiliary stuffing ring.

Detailed Description

The following description of the embodiments of the present application will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present application, but not all embodiments. The following description of at least one exemplary embodiment is merely exemplary in nature and is in no way intended to limit the application, its application, or uses. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the present application. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.

The relative arrangement of the components, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present application unless it is specifically stated otherwise. Spatially relative terms, such as "upper," "lower," "left," "right," and the like, may be used in the embodiments for ease of description to describe one element or feature's relationship to another element or feature's illustrated in the figures. It will be understood that the spatial terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "under" other elements or features would then be oriented "over" the other elements or features. Thus, the exemplary term "lower" may encompass both an upper and lower orientation. The device may be otherwise positioned (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly. Meanwhile, it should be understood that the sizes of the respective parts shown in the drawings are not drawn in actual scale for convenience of description. Techniques, processes and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but should be considered part of the specification where appropriate. In all examples shown and discussed herein, any specific values should be construed as merely illustrative, and not a limitation. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further discussion thereof is necessary in subsequent figures.

In addition, the terms "first", "second", etc. are used to define the components, and are only for convenience of distinguishing the corresponding components, and the terms have no special meaning unless otherwise stated, and therefore should not be construed as limiting the scope of the present application.

Example 1:

As shown in fig. 1-3, a main shaft sealing device of a water turbine comprises a main shaft body 1, a pressing ring 2 and a packing box 3, wherein the pressing ring 2 and the packing box 3 are sleeved with the main shaft body 1, the upper end of the pressing ring 2 is rotationally connected with a pressing mechanism 4, the lower end of the pressing ring 2 is connected with the packing box 3, a cavity between the pressing ring 2 and the packing box 3 is arranged to form a packing groove 5, a packing ring 6 and a pressing body 7 are arranged in the packing groove 5, the pressing body 7 is in sliding connection with the outer side face of the packing ring 6 through the pressing mechanism 4, the inner side face of the packing ring 6 is in pressure connection with the surface of the main shaft body 1 through the pressing body 7, and the pressing ring 2 is connected with the packing box 3 in a disassembling mode.

As shown in fig. 3 and 4, the pressing ring 2 is provided with a sliding groove 8, the pressing body 7 is provided with a limiting groove 9, the limiting grooves 9 are provided with two pressing blocks 10 which are oppositely arranged, one side groove wall of each limiting groove 9 is provided with a downward pressing inclined surface 11, the pressing mechanism 4 comprises a sliding block 12 and a connecting rod 13, the connecting rod 13 is in sliding connection with the sliding groove 8, one end of the connecting rod 13 is connected with the pressing blocks 10, the other end of the connecting rod 13 is connected with the sliding block 12, the pressing blocks 10 are in sliding connection with the downward pressing inclined surfaces 11 through the sliding blocks 12, and the sliding directions of the two sliding blocks 12 are oppositely arranged.

As shown in fig. 3, the opposite surfaces of the compression ring 2 and the packing ring 6 are both in stepped cross sections, a first guide inclined surface 14 is arranged at the joint of the adjacent joint surfaces of the stepped surfaces of the compression ring 2, and the compression ring 2 is in sliding connection with the first guide inclined surface 14. The inner wall of the packing ring 6 is provided with a limit groove 16, the limit groove 16 is provided with an auxiliary packing ring 24, and the auxiliary packing ring 24 is sleeved with the main shaft body 1.

As shown in fig. 3, the compression ring 2 is connected with a mounting block 17, the stuffing box 3 is provided with a connecting groove 18 and a movable groove 19, the mounting block 17 is inserted into the connecting groove 18, the mounting block 17 is provided with a slot 20, a spring mechanism 21 is arranged in the movable groove 19, one end of the spring mechanism 21 is connected with the movable groove 19, the other end of the spring mechanism 21 is connected with an inserting block 22, a second guiding inclined plane 23 is arranged on the inserting block 22, and the inserting block 22 is inserted into the slot 20 through the second guiding inclined plane 23.

As shown in fig. 1-4: the packing box 3 is provided with a positioning hole, the lower end of the compression ring 2 protrudes out and is inserted into the positioning hole, so that the compression ring 2 is quickly connected with the packing box 3, and the edge of the lower end of the compression ring is inwards retracted so as to enter the positioning hole, thereby improving the connection efficiency.

The mounting blocks 17 are arranged around the circumference of the stuffing box 3 in a plurality of ways to improve the connection strength between the compression ring 2 and the stuffing box 3 and the integrity.

When in use, the utility model is characterized in that: the packing box 3 is sleeved on the main shaft body 1, the packing ring 6 with the auxiliary pressing ring packing ring 24 is sleeved on the main shaft body 1 along the packing box 3, the pressing ring 2 with the pressing body 7 is sleeved with the main shaft body 1, the mounting block 17 enters the connecting groove 18 to be clamped into the inserting block 22, the two sliding blocks 12 are rotated reversely, the pressing block 10 thoroughly inserts the pressing body 7 between the pressing ring 2 and the packing ring 6 along the downward pressing inclined surface 11, the packing ring 6 is tightly pressed on the main shaft body 1, the pressing block 10 leaves the limiting groove 9 to enable the pressing block 10 to be propped against the pressing body 7 to keep the pressing tightness, and the sealing of the main shaft body 1 is completed.

The above embodiments are only for illustrating the technical solution of the present utility model, and are not limiting; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present utility model.

Claims

1. The utility model provides a hydraulic turbine main shaft sealing device, characterized by, includes main shaft body (1), clamping ring (2) and packing box (3) cup joint with main shaft body (1), clamping ring (2) upper end rotation is connected with swager (4), the lower extreme of clamping ring (2) is connected with packing box (3), cavity between clamping ring (2) and packing box (3) is established to form packing groove (5), be equipped with packing ring (6) and swager (7) in packing groove (5), swager (7) pass through swager (4) and the lateral surface sliding connection of packing ring (6), the medial surface of packing ring (6) passes through the surface crimping of swager (7) and main shaft body (1), clamping ring (2) are dismantled with packing box (3).

2. The main shaft sealing device of a water turbine according to claim 1, characterized in that, be equipped with spout (8) on clamping ring (2), be equipped with spacing groove (9) on pressing material body (7), spacing groove (9) are equipped with two and relative arrangement, be equipped with briquetting (10) in spacing groove (9), one side cell wall of spacing groove (9) is established to push down inclined plane (11), pressing material mechanism (4) including slider (12) and connecting rod (13), connecting rod (13) and spout (8) sliding connection, the one end of connecting rod (13) is connected with briquetting (10), the other end and slider (12) of connecting rod (13) are connected, briquetting (10) are through slider (12) and push down inclined plane (11) sliding connection, and the slip direction of two sliders (12) is opposite to be arranged.

3. The main shaft sealing device of the water turbine according to claim 2, wherein the opposite surfaces of the pressing ring (2) and the packing ring (6) are of stepped cross sections, a guide inclined plane I (14) is arranged at the joint of the adjacent joint surfaces of the stepped surfaces of the pressing ring (2), and the pressing ring (2) is in sliding connection with the guide inclined plane I (14).

4. A hydraulic turbine main shaft sealing arrangement according to claim 3, characterized in that the slide (12) is provided with a number of anti-skid grooves (15).

5. The main shaft sealing device of the water turbine according to claim 4, wherein a limit groove (16) is formed in the inner wall of the packing ring (6), an auxiliary packing ring (24) is arranged on the limit groove (16), and the auxiliary packing ring (24) is sleeved with the main shaft body (1).

6. The main shaft sealing device of the water turbine according to claim 5, characterized in that the compression ring (2) is connected with a mounting block (17), the stuffing box (3) is provided with a connecting groove (18) and a movable groove (19), the mounting block (17) is inserted into the connecting groove (18), the mounting block (17) is provided with a slot (20), a spring mechanism (21) is arranged in the movable groove (19), one end of the spring mechanism (21) is connected with the movable groove (19), the other end of the spring mechanism (21) is connected with an inserting block (22), a guide inclined plane II (23) is arranged on the inserting block (22), and the inserting block (22) is inserted into the slot (20) through the guide inclined plane II (23).