CN210068771U

CN210068771U - Movable pressure equalizing device for thrust bearing of nuclear turbine

Info

Publication number: CN210068771U
Application number: CN201920969882.0U
Authority: CN
Inventors: 姚福锋; 李佳冀; 王超; 董士伟; 刘统章; 付兴伟; 丁化文; 韦俊
Original assignee: 703th Research Institute of CSIC
Current assignee: 703th Research Institute of CSIC
Priority date: 2019-06-25
Filing date: 2019-06-25
Publication date: 2020-02-14
Anticipated expiration: 2029-06-25

Abstract

The utility model provides a portable nuclear power steam turbine thrust bearing pressure equalizing device, the utility model relates to a portable nuclear power steam turbine thrust bearing pressure equalizing device, the utility model discloses a solve when the steam turbine of current marine floating nuclear power station takes place to incline and sways, need bear the axial thrust that steam turbine rotor and generator rotor arouse, the change of axial thrust causes the axle bush high temperature easily, can arouse the burnout accident seriously, the problem that brings the hidden danger for the fail safe nature of steam turbine, it includes the bearing body, the thrust dish, two bearing housing covers, two oil retainer rings, a plurality of thrust tile piece supports, a plurality of uniform pressure piece A, a plurality of dog and a plurality of uniform pressure piece B, the thrust dish suit is in the pivot and sets up with the pivot is integrative, two bearing housing set up respectively in the both sides of thrust dish, a plurality of thrust tile piece set up in the both sides of thrust dish along circumference, the utility model is used for portable nuclear power steam turbine field.

Description

Movable pressure equalizing device for thrust bearing of nuclear turbine

Technical Field

The utility model relates to a portable nuclear power steam turbine thrust bearing uniform pressure equipment device, concretely relates to portable nuclear power steam turbine thrust bearing uniform pressure equipment device.

Background

The offshore floating nuclear power station (also called an offshore nuclear power platform) is a small-sized offshore mobile nuclear power station, is an organic combination of a small-sized nuclear reactor and ship engineering, can provide safe and effective energy supply for offshore oil exploitation and remote islands, and can also be used in the fields of high-power ships and seawater desalination.

The thrust bearing of the steam turbine bears the axial thrust, when the load of the steam turbine and steam parameters change, the axial thrust also changes, particularly, when the steam turbine for the ocean nuclear power platform is influenced by the ocean environment and tilts and swings, the thrust bearing needs to bear the additional axial thrust caused by the weight of a steam turbine rotor and a generator rotor, and the axial thrust has large change amplitude and high frequency. The change of the axial thrust enables the specific pressure of each pad block of the thrust bearing to have a maximum value in a certain state, the temperature of the bearing bush is easily overhigh, the burning accident can be seriously caused, and the potential hazard is brought to the safety and the reliability of the steam turbine.

SUMMERY OF THE UTILITY MODEL

The utility model discloses a solve present marine floating nuclear power station's steam turbine and take place to incline and when swaing, need bear the axial thrust that steam turbine rotor and generator rotor arouse, axial thrust's change arouses the axle bush high temperature easily, can arouse seriously the accident of burning tile, brings the problem of hidden danger for the fail safe nature of steam turbine, and then provides a portable nuclear power turbine thrust bearing uniform pressure equipment.

The utility model discloses a solve above-mentioned problem and the technical scheme who adopts is:

the thrust disc is sleeved on a rotating shaft and is integrally arranged with the rotating shaft, the two bearing sleeves are respectively arranged at two sides of the thrust disc, the plurality of thrust pads are arranged at two sides of the thrust disc along the circumferential direction, the thrust pads at each side of the thrust disc are uniformly distributed and arranged between the thrust disc and the bearing sleeves, a plurality of thrust pad supports are arranged on the bottom plate of each bearing sleeve along the circumferential direction, a plurality of uniform pressing blocks A and a plurality of uniform pressing blocks B are arranged on each bearing sleeve along the circumferential direction, the plurality of uniform pressing blocks A and the plurality of uniform pressing blocks B are arranged on each bearing sleeve in a one-to-one staggered mode, one end of each thrust pad support is arranged on one thrust pad, and the other end of each thrust pad support is pressed against one uniform pressing block A, the opening part opposite to the bottom plate on each bearing sleeve is provided with a bearing sleeve cover, a plurality of stop blocks are uniformly distributed on each bearing sleeve cover along the circumferential direction, one end of each stop block is pressed against the pressure equalizing block B, the thrust disc and the two bearing sleeves are installed in the bearing body, the other end of each stop block is pressed against the inner wall of the bearing body, the two oil slingers are arranged on the outer sides of the two bearing sleeves, the inner ring of each oil slinger is arranged on the rotating shaft, and the outer side of each oil slinger is arranged on the side wall of one bearing body respectively.

The utility model has the advantages that:

1. when the size and the direction of the axial thrust of the steam turbine are changed due to changes of steam parameters, loads and the like or due to inclination, swinging and the like of the marine environment, uneven stress among the thrust pads and inside the thrust pads is caused. The great thrust tile of atress will deviate from the thrust dish and remove, on using uniform pressure piece A through thrust tile support 4, then on using uniform pressure piece B through the rotating surface to make the uniform pressure piece A that both sides closed on take place the removal of opposite direction through spherical bearing's lever principle, drive again and close on the thrust tile and remove to the thrust dish, the atress that the thrust tile was closed on in the increase, thereby realize the balanced atress of each thrust tile, and then reach the utility model aims at.

2. The utility model discloses utilize voltage-sharing device's lever principle for each thrust tile atress along circumference evenly distributed is balanced, has avoided individual thrust tile to arouse the too high scheduling problem of tile temperature because of the atress is too big, has improved unit fail safe nature.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention.

Fig. 2 is a pitch circle development diagram of a plurality of thrust pads 3, a plurality of thrust pad supports 4, a plurality of uniform pressing blocks a5, a plurality of stoppers 8 and a plurality of uniform pressing blocks B9 on one side of the thrust disc 10 of the present invention.

Detailed Description

The first embodiment is as follows: the embodiment is described by combining fig. 1-2, and the embodiment describes a movable nuclear turbine thrust bearing pressure equalizing device, which comprises a bearing body 1, a thrust disc 10, two bearing sleeves 2, two bearing sleeve covers 6, two oil retainer rings 7, a plurality of thrust pads 3, a plurality of thrust pad supports 4, a plurality of equalizing blocks a5, a plurality of stoppers 8 and a plurality of equalizing blocks B9, wherein the thrust disc 10 is sleeved on a rotating shaft and is integrally arranged with the rotating shaft, the two bearing sleeves 2 are respectively arranged at two sides of the thrust disc 10, the plurality of thrust pads 3 are circumferentially arranged at two sides of the thrust disc 10, the thrust pads 3 at each side of the thrust disc 10 are uniformly arranged between the thrust disc 10 and the bearing sleeves 2, a plurality of thrust pad supports 4 are circumferentially arranged on a bottom plate of each bearing sleeve 2, a plurality of equalizing blocks a5 and a plurality of equalizing blocks B9 are circumferentially arranged on each bearing sleeve 2, and a plurality of equalizing blocks a5 and a plurality of equalizing blocks B9 on each bearing sleeve 2 are alternately arranged one by one another, the one end setting of every thrust pad support 4 is on a thrust pad 3, the other end top of every thrust pad support 4 is on an equalizer block A5, the opening part relative with the bottom plate is equipped with a bearing housing lid 6 on every bearing housing 2, be equipped with a plurality of dogs 8 along the circumference equipartition on every bearing housing lid 6, the one end top of every dog 8 is on equalizer block B9, thrust disc 10 and two bearing housing 2 are all installed in bearing body 1, the other end top of every dog 8 is on the inner wall of bearing body 1, two oil slingers 7 set up the outside at two bearing housing 2, the inner ring setting of every oil slinger 7 is in the pivot, the outside of every oil slinger 7 sets up respectively on the lateral wall of a bearing body 1.

In the embodiment, the number of the pressure equalizing blocks A5 is equal to the number of the thrust pad support 4, the stop block 8 and the pressure equalizing block B9, and the number of the pressure equalizing blocks A5 is twelve, fourteen or sixteen.

The second embodiment is as follows: in the embodiment, the pressure equalizing block a5 is a 'T' -shaped projection, a circular projection is machined in the center of one side surface of a bottom plate of the 'T' -shaped projection, a protrusion is machined on the other side surface of the bottom plate of the 'T' -shaped projection, which is close to the outer circular surface of the side wall, along the circumferential direction, and the cross section of the protrusion is arc-shaped, and other methods are the same as those in the first embodiment.

The third concrete implementation mode: the embodiment is described with reference to fig. 1 and fig. 2, the pressure equalizing block a5 and the pressure equalizing block B9 of the pressure equalizing device for the thrust bearing of the mobile nuclear power turbine according to the embodiment have the same structure and size, and other methods are the same as those of the second embodiment.

The fourth concrete implementation mode: in the embodiment, the pressure equalizing block a5 in each bearing sleeve 2 is arranged between two pressure equalizing blocks B9, each pressure equalizing block B9 is arranged between two pressure equalizing blocks a5, and the convex edge of the bottom plate of each pressure equalizing block a5 is respectively arranged in contact with the convex edges of the two pressure equalizing blocks B9. The other methods are the same as those of the third embodiment.

The fifth concrete implementation mode: the embodiment is described with reference to fig. 1 and fig. 2, and the thrust pad support 4 of the mobile nuclear turbine thrust bearing pressure equalizing device in the embodiment is a cylinder, an annular groove is formed in an outer circumferential surface of the cylinder, an end surface of one end of each cylinder is arranged on one thrust pad 3, a spherical protrusion is formed in the other end surface of each cylinder, and the spherical protrusion of the cylinder is in contact with the circular protrusion of the pressure equalizing block a 5. The other methods are the same as those in the first embodiment.

Claims

1. The utility model provides a portable nuclear turbine thrust bearing voltage-sharing device which characterized in that: the thrust disc comprises a bearing body (1), a thrust disc (10), two bearing sleeves (2), two bearing sleeve covers (6), two oil retainer rings (7), a plurality of thrust pads (3), a plurality of thrust pad supports (4), a plurality of equalizing blocks A (5), a plurality of check blocks (8) and a plurality of equalizing blocks B (9), wherein the thrust disc (10) is sleeved on a rotating shaft and is integrally arranged with the rotating shaft, the two bearing sleeves (2) are respectively arranged at two sides of the thrust disc (10), the plurality of thrust pads (3) are circumferentially arranged at two sides of the thrust disc (10), the thrust pads (3) at each side of the thrust disc (10) are uniformly distributed between the thrust disc (10) and the bearing sleeves (2), a plurality of thrust pad supports (4) are circumferentially arranged on a bottom plate of each bearing sleeve (2), a plurality of equalizing blocks A (5) and a plurality of equalizing blocks B (9) are circumferentially arranged on each bearing sleeve (2), and a plurality of equalizing blocks A (5) and a plurality of equalizing blocks B (9) on each bearing sleeve (2) are arranged in a staggered way one by one, one end of each thrust pad support (4) is arranged on one thrust pad (3), the other end of each thrust pad support (4) is propped against one equalizing block A (5), an opening part opposite to the bottom plate on each bearing sleeve (2) is provided with a bearing sleeve cover (6), a plurality of check blocks (8) are uniformly distributed on each bearing sleeve cover (6) along the circumferential direction, one end of each check block (8) is propped against the equalizing block B (9), a thrust disc (10) and two bearing sleeves (2) are both arranged in the bearing body (1), the other end of each check block (8) is propped against the inner wall of the bearing body (1), two oil baffle rings (7) are arranged at the outer sides of the two bearing sleeves (2), the inner ring of each oil baffle ring (7) is arranged on a rotating shaft, the outer side of each oil scraper ring (7) is arranged on the side wall of one bearing body (1).

2. The movable pressure equalizing device for the thrust bearing of the nuclear turbine according to claim 1, wherein: the pressure equalizing block A (5) is a 'T' -shaped lug, a round lug is machined in the center of one side face of a bottom plate of the 'T' -shaped lug, a bulge is machined in the circumferential direction of the outer circular face, close to the side wall, of the other side face of the bottom plate of the 'T' -shaped lug, and the cross section of the bulge is arc-shaped.

3. The movable pressure equalizing device for the thrust bearing of the nuclear turbine as claimed in claim 2, wherein: the structure and the size of the pressure equalizing block A (5) and the pressure equalizing block B (9) are the same.

4. The movable pressure equalizing device for the thrust bearing of the nuclear turbine according to claim 3, wherein: the uniform-pressure block A (5) in each bearing sleeve (2) is arranged between two uniform-pressure blocks B (9), each uniform-pressure block B (9) is arranged between the two uniform-pressure blocks A (5), and the convex edge of the bottom plate of each uniform-pressure block A (5) is in contact with the convex edge on the two uniform-pressure blocks B (9) respectively.

5. The movable pressure equalizing device for the thrust bearing of the nuclear turbine according to claim 1, wherein: the thrust pad support (4) is a cylinder, an annular groove is formed in the outer circular surface of the cylinder, one end face of each cylinder is arranged on one thrust pad (3), a spherical protrusion is formed in the other end face of each cylinder, and the spherical protrusion of each cylinder is in contact with the circular bump of the pressure equalizing block A (5).