CN209875227U

CN209875227U - Generator set

Info

Publication number: CN209875227U
Application number: CN201920675313.5U
Authority: CN
Inventors: 邱子鹏
Original assignee: INNER MONGOLIA MENGDONG ENERGY Co Ltd; China Energy Investment Corp Ltd; Shenhua Guoneng Group Corp Ltd
Current assignee: INNER MONGOLIA MENGDONG ENERGY Co Ltd; China Energy Investment Corp Ltd; Shenhua Guoneng Group Corp Ltd
Priority date: 2019-05-10
Filing date: 2019-05-10
Publication date: 2019-12-31
Anticipated expiration: 2029-05-10

Abstract

The utility model provides a generator set, include: the water supply pump set comprises a motor, a hydraulic coupler and a water supply pump which are in driving connection, wherein an oil storage cavity is formed in the hydraulic coupler, an oil pump communicated with the oil storage cavity is further arranged in the hydraulic coupler, and the oil pump supplies oil to a first bearing chamber of the motor and a second bearing chamber of the water supply pump through an oil supply pipeline; the first bearing chamber and the second bearing chamber are communicated with the oil storage cavity through an oil return pipeline; the oil return pipeline is communicated with the oil return pipeline through the air exhaust pipeline, so that negative pressure for absorbing oil at the first bearing chamber and the second bearing chamber is formed in the oil return pipeline. The technical scheme of this application has effectively solved among the feed pump system among the prior art each faying face seepage problem in the bearing chamber of fluid coupling ware, motor and feed pump.

Description

Generator set

Technical Field

The utility model relates to a steam turbine field particularly, relates to a generating set.

Background

In the 2X 600MW supercritical coal-fired direct air-cooling steam turbine generator unit in the prior art, each unit is provided with three water-feeding pumps, the bearings of the water-feeding pumps adopt sliding bearings, the driving end of each water-feeding pump is provided with a sliding bearing, the non-driving end of each water-feeding pump is provided with a sliding bearing and a thrust bearing, lubricating oil is supplied by a lubricating oil pump in a hydraulic coupler, and the lubricating oil pump in the hydraulic coupler simultaneously supplies oil to two sliding bearings of a driving motor.

The feed pump group includes: the water supply system comprises a driving motor, a hydraulic coupler, a water supply pump and a front pump. The working principle of the driving motor, the hydraulic coupler and the water supply pump is as follows: the driving motor drives the hydraulic coupler to rotate, the hydraulic coupler is subjected to speed change according to the rotating speed requirement of the water feeding pump and then is transmitted to the water pump, and the hydraulic coupler, the water feeding pump and the water feeding pump cannot be combined. The bearing lubricating oil of the driving motor and the water feeding pump is supplied by the lubricating oil pump in the hydraulic coupler through the connection of the pipelines, and the return oil also returns to the hydraulic coupler through the pipeline for next circulation. The pressure is not present or there is a slight positive pressure in the return line operation and in the fluid coupling, so that oil leaks and oil leaks are prone to occur in the return line operation and in the fluid coupling.

The leakage problem of each joint surface of a hydraulic coupler, a motor, a bearing oil gear of a water supply pump and an oil system in the water supply pump system is serious. Specifically, oil leakage and oil seepage phenomena exist in hydraulic couplers, oil barriers of motor bearing chambers, oil barriers of water pump bearing chambers and various pressure, temperature and rotating speed measuring points. In the prior art, the hydraulic coupler has frequent oil supplement and larger lubricating oil consumption. Although the treatment is carried out for a plurality of times, the final effect is not ideal. The leakage of the lubricating oil causes environmental pollution on one hand and also influences the safe and economic operation of equipment on the other hand.

SUMMERY OF THE UTILITY MODEL

A primary object of the present invention is to provide a generator set to solve the leakage problem of each joint surface in the bearing chamber of the hydraulic coupler, the motor and the water feeding pump in the water feeding pump system in the prior art.

In order to achieve the above object, the utility model provides a generator set, include: the water supply pump set comprises a motor, a hydraulic coupler and a water supply pump which are in driving connection, wherein an oil storage cavity is formed in the hydraulic coupler, an oil pump communicated with the oil storage cavity is further arranged in the hydraulic coupler, and the oil pump supplies oil to a first bearing chamber of the motor and a second bearing chamber of the water supply pump through an oil supply pipeline; the first bearing chamber and the second bearing chamber are communicated with the oil storage cavity through an oil return pipeline; the oil return pipeline is communicated with the oil return pipeline through the air exhaust pipeline, so that negative pressure for absorbing oil at the first bearing chamber and the second bearing chamber is formed in the oil return pipeline.

Further, a pressure adjusting device and a pressure detecting device are arranged on the air exhaust pipeline, and the pressure ranges of the oil return pipeline and the oil storage cavity are between 0.2KPa and 0.3KPa under the control of the pressure adjusting device and the pressure detecting device.

Further, generating set still includes a plurality of check valves, and a plurality of check valves are including setting up the first check valve in first bearing chamber department, setting up the second check valve in second bearing chamber department and setting up the third check valve on the extraction air pipeline.

Furthermore, a first vent hole is formed in the first bearing chamber, the first check valve is connected with the first vent hole, a second vent hole is formed in the second bearing chamber, and the second check valve is connected with the second vent hole.

Further, the third check valve is connected with the air exhaust pipeline through a first air inlet pipe.

Further, the air suction pipeline is connected with an air outlet of the oil storage cavity.

Further, the air exhaust pipeline comprises an air exhaust air inlet pipe and an air exhaust pipe which are communicated with the air exhaust device, the air exhaust air inlet pipe is connected with an air outlet of the oil storage cavity, and the air exhaust pipe is communicated with the atmosphere.

Furthermore, the number of the water feed pump sets is multiple, the number of the air extracting devices is one, and the air extracting and inlet pipe comprises a plurality of second air inlet pipes which are respectively connected with the water feed pump sets.

Furthermore, the air exhaust and inlet pipe also comprises a collecting pipe, the first end of the collecting pipe is communicated with the air exhaust device, the second end of the collecting pipe is communicated with each second air inlet pipe, and the second air inlet pipe is provided with a third check valve, a pressure adjusting device and a pressure detecting device.

Further, the pressure regulating device is a valve gate, and the pressure detecting device is a pressure gauge.

Use the technical scheme of the utility model, generating set includes feed pump group, air exhaust device and exhaust line. The water feed pump set comprises a motor, a hydraulic coupler and a water feed pump which are in driving connection. An oil storage cavity is formed in the hydraulic coupler, an oil pump communicated with the oil storage cavity is further arranged in the hydraulic coupler, and the oil pump supplies oil to a first bearing chamber of the motor and a second bearing chamber of the water supply pump through an oil supply pipeline. The first bearing chamber and the second bearing chamber are communicated with the oil storage cavity through an oil return pipeline. The air exhaust device is communicated with the oil return pipeline through an air exhaust pipeline so as to form negative pressure for sucking oil at the first bearing chamber and the second bearing chamber in the oil return pipeline. Thus, the oil storage chamber, the first bearing chamber and the second bearing chamber can be in a negative pressure state, and air has a blowing force applied to the negative pressure region at oil leakage points of joint surfaces in the oil storage chamber, the first bearing chamber and the second bearing chamber in the hydraulic coupler, so that lubricating oil is prevented from leaking outwards. Therefore, the technical scheme of the application can solve the problem of leakage of the joint surfaces in the bearing chambers of the hydraulic coupler, the motor and the water feed pump.

Drawings

The accompanying drawings, which form a part of the present application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:

fig. 1 shows a schematic structural view of an embodiment of a generator set according to the invention; and

fig. 2 shows a schematic diagram of the feed pump group of the generator set of fig. 1.

Wherein the figures include the following reference numerals:

1. a water feed pump set; 10. a motor; 11. a first bearing chamber; 111. a first vent hole; 20. a fluid coupling; 21. an oil storage chamber; 211. an exhaust port; 22. an oil pump; 23. an input shaft; 231. inputting a shaft seal; 24. an output shaft; 241. an output shaft seal; 30. a feed pump; 31. a second bearing chamber; 311. a second vent hole; 41. an oil supply line; 42. an oil return line; 50. an air extraction device; 51. an air extraction pipeline; 511. an air suction inlet pipe; 5111. a second intake pipe; 5112. a header; 512. an air exhaust pipe; 52. a first intake pipe; 61. a pressure regulating device; 62. a pressure detection device; 70. a check valve; 71. a first check valve; 72. a second check valve; 73. a third check valve; 81. and (4) turning on a point.

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. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

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 example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

Unless specifically stated otherwise, the relative arrangement of the components and steps, the numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present invention. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.

As shown in fig. 1 and fig. 2, the generator set of the present invention includes: a feed pump group 1, a suction device 50 and a suction line 51. The feed pump group 1 comprises a motor 10, a fluid coupling 20 and a feed pump 30 which are in driving connection. An oil storage chamber 21 is formed in the fluid coupling 20, an oil pump 22 communicated with the oil storage chamber 21 is further provided in the fluid coupling 20, and the oil pump 22 supplies oil to the first bearing chamber 11 of the motor 10 and the second bearing chamber 31 of the water supply pump 30 through an oil supply line 41. The first bearing chamber 11 and the second bearing chamber 31 communicate with the oil reservoir chamber 21 through the oil return line 42. The air extractor 50 is communicated with the oil return pipeline 42 through an air extraction pipeline 51, so that negative pressure for sucking oil at the first bearing chamber 11 and the second bearing chamber 31 is formed in the oil return pipeline 42.

With the solution of the present embodiment, the oil pump 22 supplies oil to the first bearing chamber 11 of the motor 10 and the second bearing chamber 31 of the water pump 30 through the oil supply line 41. The first bearing chamber 11 and the second bearing chamber 31 communicate with the oil reservoir chamber 21 through the oil return line 42. The air extractor 50 is communicated with the oil return pipeline 42 through an air extraction pipeline 51, so that negative pressure for sucking oil at the first bearing chamber 11 and the second bearing chamber 31 is formed in the oil return pipeline 42. Thus, the oil reservoir chamber 21, the first bearing chamber 11 and the second bearing chamber 31 can be in a negative pressure state, and at oil leakage points of joint surfaces in the oil reservoir chamber 21, the first bearing chamber 11 and the second bearing chamber 31, air has a blowing force applied to a negative pressure region to the oil leakage points, thereby preventing lubricating oil from leaking outside. Therefore, the technical scheme of the embodiment can solve the problem of leakage of the joint surfaces in the bearing chambers of the hydraulic coupler, the motor and the water feeding pump. The internal arrows of the gas evacuation device 50 of this embodiment show the flow of gas.

As shown in fig. 1 and 2, the suction line 51 is provided with a pressure adjusting device 61 and a pressure detecting device 62, and the pressure in the oil return line 42 and the oil storage chamber 21 ranges from 0.2KPa to 0.3KPa under the control of the pressure adjusting device 61 and the pressure detecting device 62, so that the pressures in the first bearing chamber 11, the second bearing chamber 31, the oil return line 42 and the oil storage chamber 21 are in a slightly negative pressure state. Compared with the case that the negative pressure is lower than 0.2Kpa or higher than 0.3Kpa, if the negative pressure is lower than 0.2Kpa, leaked oil in the first bearing chamber, the second bearing chamber and an oil storage cavity of the fluid coupling is not easy to suck back, and part of the oil leaks out; if the negative pressure is higher than 0.3KPa, oil is sucked back into the first bearing chamber, the second bearing chamber and the oil storage cavity of the fluid coupling, and simultaneously, oil is sucked with a large amount of air, thereby influencing the oil quality in the bearing chamber and the oil storage cavity. The pressure range of the embodiment is between 0.2KPa and 0.3KPa, which not only effectively reduces part of oil leakage, but also prevents a large amount of air from being sucked. In addition, the pressure range of the embodiment is 0.2KPa to 0.3KPa, which does not affect the working pressure of the oil pump 22, so that the purpose that the air extraction device 50 can eliminate the leakage of oil in the water pump set is further ensured on the premise that the normal operation of the oil pump 22 is not affected. The oil pump 22 of the present embodiment is a lubricating oil pump.

As shown in fig. 1 and 2, the generator set further includes a plurality of check valves 70, and the plurality of check valves 70 include a first check valve 71 disposed at the first bearing chamber 11, a second check valve 72 disposed at the second bearing chamber 31, and a third check valve 73 disposed on the suction line 51. In the state of negative pressure, air particles sucked in the first bearing chamber 11 can be discharged out of the first bearing chamber 11 through the first check valve 71, while the first check valve 71 prevents air from entering outside the first bearing chamber 11. Similarly, air particles sucked into the second bearing chamber 31 can be discharged from the second check valve 72 to the outside of the second bearing chamber 31, and the second check valve 72 prevents air from the outside of the second bearing chamber 31 from entering. Air particles sucked into the suction line 51 can be discharged out of the suction line 51 through the third check valve 73, and the third check valve 73 prevents air from entering outside the suction line 51. The check valve 70 of this embodiment is preferably sized DN 15.

As shown in fig. 2, the first air vent hole 111 is formed in the first bearing chamber 11, and the first check valve 71 is connected to the first air vent hole 111, so that the first check valve 71 is communicated with the first bearing chamber 11. The end of the first check valve 71 not connected to the first vent hole 111 is vented to the atmosphere, which facilitates the discharge of air particles from the first bearing chamber 11. The second bearing chamber 31 is provided with a second vent hole 311, and the second check valve 72 is connected with the second vent hole 311, so that the second check valve 72 is communicated with the second bearing chamber 31 conveniently. The end of the second check valve 72 not connected to the second vent hole 311 is vented to the atmosphere, which facilitates the discharge of air particles from the second bearing chamber 31.

As shown in fig. 1, the third check valve 73 is connected to the suction line 51 through the first intake pipe 52, which facilitates installation of the third check valve 73. The first intake pipe 52 is connected to the connection point 81 of the suction pipe 51 by a three-way joint, so that a branch line is formed on the side of the suction pipe 51. The third check valve 73 vents air particles to the atmosphere through an air outlet duct.

As shown in fig. 2, the suction line 51 is connected to the exhaust port 211 of the oil reservoir chamber 21. Therefore, the filter cover is only required to be taken down and directly connected with the air suction pipeline 51, and an extra connecting port is not required to be arranged, so that the structure is simple. The exhaust port 211 of the reservoir chamber 21 in this embodiment is a breathing exhaust port of the fluid coupling 20. Thus, the exhaust port 211 only maintains the function of exhausting air to the outside, and air cannot be sucked in, preventing positive pressure from being formed in the fluid coupling 20 when the air extracting device 50 is suddenly stopped.

As shown in fig. 1, the air suction line 51 includes an air suction inlet pipe 511 and an air suction outlet pipe 512 which are communicated with the air suction device 50, the air suction inlet pipe 511 is connected to the air outlet 211 of the oil storage chamber 21, and the air suction outlet pipe 512 is communicated with the atmosphere. Thus, the gas in the first bearing chamber 11, the second bearing chamber 31, and the oil reservoir 21 is easily discharged to the atmosphere along the suction inlet pipe 511 and the suction outlet pipe 512. The bleed air inlet duct 511 of this embodiment is preferably a PVC transparent wire hose of DN 25. The exhaust and air pipe 512 of this embodiment is preferably a PVC transparent wire hose of DN 32.

As shown in fig. 1, the number of the water feed pump groups 1 is three, the number of the air extracting devices 50 is one, and the air extracting intake pipe 511 includes three second intake pipes 5111 connected to the plurality of water feed pump groups 1, respectively. Thus, the feed pump unit 1 operates in a state of micro-negative pressure operation, and only one air extraction device 50 is used, which can reduce the cost. In other embodiments not shown in the figures, the feed pump group 1 may be two, four and more. The evacuation device 50 of this embodiment is a vacuum pump. Of course, the air extraction device can also be a negative pressure fan.

Preferably, the air extraction device 50 is mounted on one side of the middle of the three fluid couplings 20, which facilitates the connection of the air extraction device 50 to the other two fluid couplings 20. The air extraction device 50 can extract about 40m of air per hour for each feed pump set³The pumping amount of the three water feeding pump sets is about 120m³。

As shown in fig. 1, the extracted air inlet pipe 511 further includes a header 5112, a first end of the header 5112 communicates with the air extraction device 50, a second end of the header 5112 communicates with each of the second air inlet pipes 5111, and the second air inlet pipes 5111 are provided with a third check valve 73, a pressure adjustment device 61, and a pressure detection device 62. This enables each feed pump group 1 to operate in a slightly negative pressure condition. Preferably, the three second intake pipes 5111 are connected together through a tee and then connected to the second end of the header 5112 through another tee.

Preferably, since there are three fluid couplings 20 and six first bearing chambers 11, there are six first oil stops (not shown in the drawings) in the first bearing chambers 11 and six second bearing chambers 31, and there are six second oil stops (not shown in the drawings) in the second bearing chambers 31, in the case where each water feed pump group 1 is in a state of a slight negative pressure, the lubricating oil at the first oil stops and the second oil stops can be prevented from leaking out even if the first oil stops and the second oil stops are in a state of a slight negative pressure. In addition, the feed pump group 1 can prevent the leakage of the lubricant at the oil leakage points at the joint surfaces such as the pressure, temperature and rotation speed measuring points which are not shown in the figure, in the state of micro negative pressure.

As shown in fig. 1, the pressure regulating device 61 is a valve gate, and the pressure detecting device 62 is a pressure gauge. In this way, the negative pressure in each feed pump group 1 is adjusted by adjusting the opening of the valve gate according to the pressure of the pressure gauge of each feed pump group 1. The valve gate of this embodiment is preferably sized DN 25.

Specifically, the fluid coupling 20 further includes a fluid coupling body, and an input shaft 23 and an output shaft 24 connected to the fluid coupling body, wherein the fluid coupling body is sealed with the input shaft 23 by an input shaft seal 231, and the fluid coupling body is sealed with the output shaft 24 by an output shaft seal 241. The pressure gauge is connected with the air exhaust inlet pipe 511 through a tee joint.

In this embodiment, the suction line 51 is provided with a pressure reducing valve (not shown) in an open state when the feed-water pump group is started.

In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the orientation words such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" etc. are usually based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplification of description, and in the case of not making a contrary explanation, these orientation words do not indicate and imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore, should not be interpreted as limiting the scope of the present invention; the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.

Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative 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 a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

It should be noted that the terms "first", "second", and the like are used to define the components, and are only used for convenience of distinguishing the corresponding components, and if not stated otherwise, the terms have no special meaning, and therefore, the scope of the present invention should not be construed as being limited.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A generator set, comprising:

the water supply pump set (1) comprises a motor (10), a hydraulic coupler (20) and a water supply pump (30) which are in driving connection, wherein an oil storage cavity (21) is formed in the hydraulic coupler (20), an oil pump (22) communicated with the oil storage cavity (21) is further arranged in the hydraulic coupler (20),

the oil pump (22) supplies oil to a first bearing chamber (11) of the motor (10) and a second bearing chamber (31) of the water feed pump (30) through an oil supply pipeline (41);

the first bearing chamber (11) and the second bearing chamber (31) are communicated with the oil storage cavity (21) through an oil return pipeline (42);

the oil return device comprises an air extracting device (50) and an air extracting pipeline (51), wherein the air extracting device (50) is communicated with the oil return pipeline (42) through the air extracting pipeline (51), so that negative pressure for absorbing oil at the first bearing chamber (11) and the second bearing chamber (31) is formed in the oil return pipeline (42).

2. Generator set according to claim 1, characterised in that the extraction line (51) is provided with a pressure regulating device (61) and a pressure detecting device (62), the pressure in the return line (42) and the oil reservoir (21) ranging between 0.2KPa and 0.3KPa under the control of the pressure regulating device (61) and the pressure detecting device (62).

3. Genset according to claim 1, characterized in that it further comprises a plurality of non return valves (70), the plurality of non return valves (70) comprising a first non return valve (71) arranged at the first bearing chamber (11), a second non return valve (72) arranged at the second bearing chamber (31) and a third non return valve (73) arranged on the extraction line (51).

4. A generator set according to claim 3, characterized in that said first bearing chamber (11) is provided with a first ventilation hole (111), said first non-return valve (71) being connected to said first ventilation hole (111), said second bearing chamber (31) is provided with a second ventilation hole (311), said second non-return valve (72) being connected to said second ventilation hole (311).

5. A generator set according to claim 3, characterized in that said third non-return valve (73) is connected to said suction line (51) through a first air intake duct (52).

6. Generator set according to claim 1, characterised in that the suction line (51) is connected to the discharge opening (211) of the oil reservoir (21).

7. The generator set according to claim 6, characterized in that the air suction line (51) comprises an air suction inlet pipe (511) and an air suction outlet pipe (512) which are communicated with the air suction device (50), the air suction inlet pipe (511) is connected with the air outlet (211) of the oil storage cavity (21), and the air suction outlet pipe (512) is communicated with the atmosphere.

8. Generator set according to claim 7, characterized in that said feed-pump group (1) is a plurality, said air extraction device (50) is a single one, said air extraction inlet duct (511) comprising a plurality of second inlet ducts (5111) connected respectively to a plurality of said feed-pump groups (1).

9. The generator set according to claim 8, characterized in that the extraction air intake duct (511) further comprises a header (5112), a first end of the header (5112) communicating with the extraction device (50), a second end of the header (5112) communicating with each of the second air intake ducts (5111), the second air intake ducts (5111) being provided with a third non-return valve (73), a pressure regulating device (61) and a pressure detecting device (62).

10. The generator set according to claim 2, characterized in that the pressure regulating means (61) is a valve gate and the pressure detecting means (62) is a pressure gauge.