CN112483458A

CN112483458A - Sealed oil collecting system of steam turbine driving compressor coupling in MVR salt manufacturing device

Info

Publication number: CN112483458A
Application number: CN202011270958.4A
Authority: CN
Inventors: 赵营峰; 黄轶震; 王泰; 陈留平; 徐敏; 张志平; 朱旭初; 孙剑波; 李焕
Original assignee: China Salt Jintan Co Ltd
Current assignee: China Salt Jintan Co Ltd
Priority date: 2020-11-13
Filing date: 2020-11-13
Publication date: 2021-03-12

Abstract

The invention discloses a sealing oil collecting system for a coupling of a turbine-driven compressor in an MVR salt production device, which comprises a tubular protective cover and an oil return pipeline, wherein the tubular protective cover is sleeved on the coupling along the axial direction of the coupling, the oil return pipeline is communicated with the protective cover, two ends of the protective cover are respectively connected with a first bearing box and a second bearing box in a sealing and flexible mode, and an oil mist fan is arranged on the oil return pipeline and used for enabling negative pressure in the protective cover, the first bearing box and the second bearing box. The protective cover is connected with an oil return pipeline, a slightly large negative pressure is formed in the first bearing box and the second bearing box by utilizing an oil mist fan and an oil station oil return siphon principle, the problem of oil leakage of oil barriers outside the first bearing box and the second bearing box is solved, high temperature generated by high-speed rotation of the coupler is cooled by utilizing sucked lubricating oil, the problems of high temperature, vibration, wind noise and the like generated by high-speed rotation of the diaphragm type coupler are solved, the oil barriers of the bearing box of high-speed rotation equipment are prevented from oil leakage, leaked oil is collected and utilized, and potential safety hazards of the half-cover type protective cover are eliminated.

Description

Sealed oil collecting system of steam turbine driving compressor coupling in MVR salt manufacturing device

Technical Field

The invention belongs to the technical field of shaft sealing, and particularly relates to a sealing oil collecting system for a coupling of a turbine-driven compressor in an MVR salt production device.

Background

From 2010, several sets of hot-pressing salt-making devices are built in China successively, and from the application of hot-pressing salt-making of enterprises such as medium-salt gold altar salinization limited liability companies and the like, a lot of effective experiences are provided for the application of a mechanical hot-pressing salt-making process, and a practical basis is also provided for the localization of the whole process. With the continuous improvement of the integral level of the domestic mechanical manufacturing industry, the hot-pressing salt making process and the key equipment compressor are made in China. The centrifugal compressor is used as key equipment for compressing and conveying various gases in chemical production, and has an extremely important position, the centrifugal compressor is generally driven by a steam turbine or a motor, the steam turbine drives the centrifugal compressor, and the centrifugal compressor has the characteristics of adjustable rotating speed, easy load control, reasonable utilization of self-produced steam of the device and the like, and is widely applied to industrial production. However, in the salt production device, the driving equipment is still mainly based on a motor, and no relevant case exists for driving a steam turbine. The existing equipment in the MVR salt-nitrate co-production workshop of the medium salt gold jar company utilizes electric energy to drive the compressor to do work, and meanwhile, the existing compressor in the plant area needs to be powered off from the internet at a high price. The back pressure steam of the steam turbine is used for removing the multi-effect evaporation salt manufacturing device, and steam-electricity linkage of plant production devices is achieved. The technical transformation of a steam turbine instead of a motor-driven compressor and the optimization of a salt making process are completed in 2018, the energy structure is changed, the production cost is further reduced, the purposes of saving energy and reducing consumption to a greater extent are achieved, and greater economic benefits are brought.

The bearings of the steam turbine and the compressor in high-speed operation need to be lubricated by lubricating oil and take away heat, and meanwhile, the speed regulating oil and the safety oil in a steam turbine control system ensure the realization of the functions of regulating the rotating speed of the steam turbine and stopping the steam turbine in an emergency. The functions of the oil transportation device bring extremely high requirements on the quality of oil, the oil level and the oil temperature, the leakage of oil and the like of an oil way system, so the oil transportation is very important.

The original design of the diaphragm type coupling shield is a half-cover shield, the shield shakes greatly when a turbine compressor runs at high speed, and risks of collision and friction exist; and the wind noise of the coupler is large during operation, and the potential safety hazard is high when the coupler is in direct contact with the outside, as shown in figure 1. In actual operation, particularly for parts rotating at high speed, the rotating speed of a coupling between the compressor and the steam turbine reaches or is higher than 9000r/min, and oil leakage of the oil seal is obvious. After oil leakage, lubricating oil waste is easily caused, and meanwhile, the field environment is deteriorated, so that the risk of post patrol, slipping and falling injury of operators is brought; in particular, it is liable to cause a fire risk. For example, the diaphragm type coupling is connected with a shaft in a diaphragm type flexible connection mode, the diaphragm is in an open type and is protected in a shell-free mode, blast friction is easy to generate when the shaft rotates at high speed of over 9000r/min, the temperature generated by friction is in direct proportion to the rotating speed of the diaphragm, and meanwhile noise and vibration are accompanied. If a closed shield is adopted, the space is limited, and if the temperature in the shield can reach 125-135 ℃ without cooling, and heat can not be dissipated, the temperature is higher after heat accumulation. And the flash point of the turbine oil is 180 ℃, so that the fire risk exists. By the scheme, the temperature in the shield is controlled to be 70-80 ℃, the temperature is obviously reduced, and the normal operation temperature is reached.

Disclosure of Invention

In order to overcome the defects of the prior art, the invention provides a sealing oil collecting system for a coupling of a turbine driving compressor in an MVR salt manufacturing device.

In order to achieve the purpose, the invention adopts the technical scheme that: a sealed oil collecting system of a coupling of a turbine driving compressor in an MVR salt manufacturing device comprises a turbine and a compressor, wherein a power output shaft of the turbine is rotatably mounted on a first bearing box through a bearing, a first oil level is arranged between the power output shaft of the turbine and the first bearing box, a power input shaft of the compressor is rotatably mounted on a second bearing box through a bearing, a second oil level is arranged between the power input shaft of the compressor and the second bearing box, and the power output shaft of the turbine is in transmission connection with the power input shaft of the compressor through the coupling between the first bearing box and the second bearing box;

the oil return pipeline is provided with an oil mist fan and is used for keeping negative pressure in the protective cover, the first bearing box and the second bearing box.

Furthermore, a metal soft joint is arranged on the oil return pipeline and used for reducing pipeline vibration and stress of the protective cover.

Furthermore, an oil return valve is arranged on the oil return pipeline and used for controlling the oil quantity and the negative pressure, and high-temperature oil returns to the oil tank.

Furthermore, a sight glass is arranged on the oil return pipeline and used for observing and patrolling the running condition of the oil.

Furthermore, the coupler is a diaphragm type coupler, and an air inlet is formed in the position, opposite to the coupler diaphragm, on the protective cover. The air inlet is formed in the position, right opposite to the coupler diaphragm, of the protection cover, so that the blast effect is reduced, the cooling effect on the coupler diaphragm is improved, the ignition risk possibly caused by the fact that the temperature of oil in the sealed space of the protection cover rises is avoided, the synergistic effect of oil cooling and air cooling is adopted, the service life of the coupler diaphragm is prolonged, the operation period of a steam turbine and a compressor is prolonged, the cost is reduced, and the maintenance process is simplified. When the air return valve is used together, the negative pressure in the protective cover can be controlled, so that the ventilation opening keeps the negative pressure to introduce fresh air.

Furthermore, the air conditioner also comprises an air inlet pipe, wherein a filter is arranged at the air inlet end of the air inlet pipe, and the air outlet end of the air inlet pipe is hermetically connected with the air inlet. After being filtered by a filter, air is sucked into a coupling shield of the steam turbine and the compressor under micro negative pressure, the diaphragm is cooled at the coupling diaphragm, and the air returns to an oil tank from the coupling diaphragm to an oil return main pipe and is discharged by an oil mist fan.

Furthermore, reinforcing ribs are arranged between 2 air inlet pipes.

Furthermore, an oil tank is arranged on the oil return pipeline, and the oil tank and the oil mist fan are sequentially arranged along the flowing direction of fluid in the oil return pipeline. An oil return cooling system can be further arranged for cooling the oil in the oil tank, and the oil returns to the first bearing box and the second bearing box after being cooled, and the circulation is carried out. The oil is recycled, the waste of the oil is reduced, and the influence of oil mist on the field environment, safety and the like is avoided.

Furthermore, the first oil gear is a handle type oil gear, and the second oil gear is an embedded type oil gear.

Further, the protective cover is flexibly and hermetically connected with the first bearing box, and/or the protective cover is flexibly and hermetically connected with the second bearing box. Furthermore, the protective cover is connected with the first bearing box in a flexible sealing mode through the packing, and/or the protective cover is connected with the second bearing box in a flexible sealing mode through the packing.

Furthermore, one end of the protective cover is in flexible sealing connection with the first bearing box through a packing, and the other end of the protective cover is in rigid sealing connection with the second bearing box through a bolt; or one end of the protective cover is in flexible sealing connection with the second bearing box through a packing, and the other end of the protective cover is in rigid sealing connection with the first bearing box through a bolt; the safety cover is formed by detachably splicing an upper semicircular protective cover and a lower semicircular protective cover. And the packing is adopted for sealing, and the flexibility of the packing is utilized to offset the stress generated by expansion with heat and contraction with cold of the shield so as to prevent the stress from being transmitted to the end of the steam turbine or the compressor. Meanwhile, the structure is simpler than the conventional upper and lower four-piece type protective cover. Compared with rubber strip sealing or sealant sealing, the packing sealing has good sealing performance and longer service life. When the protective cover is detached, the protective cover can be detached only by loosening the nut of the bolt connecting end of one semicircular protective cover, and the maintenance and the overhaul are simpler and more convenient.

Compared with the prior art, the invention has the following technical effects: the protective cover is sleeved on the coupler along the axial direction, two ends of the protective cover extend to the first bearing box and the second bearing box towards two sides respectively, and are in sealed flexible connection with the first bearing box and the second bearing box, so that the protective cover is in sealed communication with the inner parts of the first bearing box and the second bearing box, on the basis, the protective cover is connected with the oil return pipeline, and by utilizing an oil mist fan and an oil station oil return siphon principle on the oil return pipeline, a slightly large negative pressure is formed in the first bearing box and the second bearing box, the problem of oil leakage of an oil shield outside the first bearing box and the second bearing box is solved, and high temperature generated by high-speed rotation of the coupler.

The technical scheme of the invention thoroughly solves the problems of high temperature, vibration, wind noise and the like caused by high-speed rotation of the diaphragm type coupling, simultaneously solves the problem of oil leakage of an oil shield of a bearing box of high-speed rotation equipment, collects and utilizes the leaked oil, and eliminates the potential safety hazard of the half-cover type shield.

The device is suitable for diaphragm type coupling, flexible coupling, rigid coupling with gear, etc.

Drawings

Fig. 1 is a schematic view showing a structure of a protective cover in the prior art.

Fig. 2 is a schematic structural diagram of a sealing oil collecting system of a coupling of a turbine-driven compressor in an MVR salt manufacturing device in an embodiment of the present invention.

The reference numbers in the figures are: 1. the novel oil mist air compressor comprises a steam turbine, 2 a compressor, 3 a first bearing box, 4 a second bearing box, 5 a first oil gear, 6 a second oil gear, 7 a coupler, 7-1 a coupler diaphragm, 8 a protective cover, 9 an air inlet pipe, 10 a reinforcing rib, 11 a filter, 12 an oil return branch pipe, 13 an oil return header pipe, 14 a metal soft joint, 15 a sight glass, 16 an oil return valve, 17 an oil tank, 18 an oil mist fan and 19 a support.

Detailed Description

The present invention is not limited to the following embodiments, and those skilled in the art can implement the present invention in other embodiments according to the disclosure of the present invention, or make simple changes or modifications on the design structure and idea of the present invention, and fall into the protection scope of the present invention. It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention. Furthermore, the terms "first", and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "first," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.

The specific embodiment of the invention is shown in fig. 2, a sealed oil collecting system for a coupling of a turbine-driven compressor in an MVR salt manufacturing device comprises a turbine 1 and a compressor 2, a power output shaft of the turbine 1 is rotatably mounted on a first bearing box 3 through a bearing, a first oil level 5 is arranged between the power output shaft of the turbine 1 and the first bearing box 3, a power input shaft of the compressor 2 is rotatably mounted on a second bearing box 4 through a bearing, a second oil level 6 is arranged between the power input shaft of the compressor 2 and the second bearing box 4, and the power output shaft of the turbine 1 is in transmission connection with the power input shaft of the compressor 2 through a coupling located between the first bearing box 3 and the second bearing box 4. Preferably, the first oil level 5 of the present embodiment is a handle type oil level, and the second oil level 6 is an in-line type oil level.

The oil-return type coupler is characterized by further comprising a tubular protective cover 8 and an oil-return pipeline, wherein the tubular protective cover 8 is sleeved on the coupler 7 along the axial direction of the coupler, the oil-return pipeline is communicated with the protective cover 8, two ends of the protective cover 8 are hermetically connected with bearing boxes at two ends of the coupler 7 respectively, and an oil mist fan 18 is arranged on the oil-return pipeline and used for keeping negative pressure in the protective cover 8, the first bearing box 3 and the second bearing box 4. Specifically, an oil return opening is formed in the bottom of the protective cover 8, and the oil inlet end of the oil return pipeline is hermetically communicated with the oil return opening. The bottom of the protective cover 8 is also provided with a support 19 for supporting 19 the protective cover 8.

The oil return pipeline is provided with a metal soft joint for reducing the vibration of the pipeline and the stress of the protective cover 8. And an oil return valve 16 is arranged on the oil return pipeline and used for controlling the oil quantity and the negative pressure, and high-temperature oil returns to the oil tank. And a sight glass 15 is arranged on the oil return pipeline and used for observing and patrolling the running condition of the oil. An oil tank 17 is arranged on the oil return pipeline, and the oil tank 17 is positioned between the oil return valve 16 and the oil mist fan 18 so as to recover oil. An oil return cooling system may be further provided to cool the oil in the oil tank 17, and the oil is returned to the first and second bearing tanks after cooling, and the process is repeated. The oil is recycled, the waste of the oil is reduced, and the influence of oil mist on the field environment, safety and the like is avoided.

Specifically, the oil return pipeline comprises an oil return main pipe 13 and an oil return branch pipe 12, the oil mist fan 18 is connected with the oil return main pipe 13, the metal soft joint 14, the view mirror 15 and the oil return valve 16 are sequentially arranged on the oil return branch pipe 12 along the flowing direction of oil, and the oil return main pipe 13 is hermetically communicated with the protective cover 8 through the oil return branch pipe 12.

The coupler 7 is a diaphragm type coupler 7, and an air inlet is formed in the position, opposite to the coupler diaphragm 7-1, of the protective cover 8. The air inlet is formed in the top of the protective cover 8, the air inlet is formed in the position, right opposite to the coupler diaphragm 7-1, of the protective cover 8, so that the blast effect is reduced, the cooling effect on the coupler diaphragm 7-1 is improved, the ignition risk possibly caused by the fact that the oil temperature in the closed space of the closed protective cover rises is avoided, the service life of the diaphragm is prolonged by the aid of the synergistic effect of oil cooling and air cooling, the operation period of the steam turbine 1 and the operation period of the compressor 2 are prolonged, the cost is reduced, and the maintenance process is simplified. In conjunction with the return valve 16, the negative pressure in the protective hood 8 can also be controlled, so that the ventilation opening is kept at negative pressure for introducing fresh air.

The air conditioner further comprises an air inlet pipe 9, a filter 11 is arranged at the air inlet end of the air inlet pipe 9, and the air outlet end of the air inlet pipe 9 is hermetically connected with the air inlet. After being filtered by a filter 11, the air is sucked into the shields of the couplings 7 of the steam turbine 1 and the compressor 2 under the micro negative pressure, the diaphragms 7-1 are cooled at the coupling diaphragms 7-1, and the air returns to an oil tank through the coupling diaphragms 7-1 to an oil return header pipe 13 and is discharged through an oil mist fan 18. And reinforcing ribs 10 are arranged between the 2 air inlet pipes 9, so that the strength requirement of the air inlet pipes 9 is met during operation.

One end of the protective cover 8 is in flexible sealing connection with the second bearing box 4 through a packing, and the other end of the protective cover 8 is in rigid sealing connection with the first bearing box 3 through a bolt and a nut. The protective cover 8 is formed by detachably splicing an upper semicircular protective cover and a lower semicircular protective cover. And the packing is adopted for sealing, and the flexibility of the packing is utilized to offset the stress generated by expansion with heat and contraction with cold of the shield so as to prevent the stress from being transmitted to the end of the steam turbine or the compressor. Meanwhile, the structure is simpler than the conventional upper and lower four-piece type protective cover. Compared with rubber strip sealing or sealant sealing, the packing sealing has good sealing performance and longer service life. When the protective cover is detached, the protective cover can be detached only by loosening the nut of the bolt connecting end of one semicircular protective cover, and the maintenance and the overhaul are simpler and more convenient.

The steam turbine drives compressor diaphragm formula shaft coupling and keeps off oily system in MVR salt manufacturing device of this embodiment, establish the safety cover on the shaft coupling along the axial cover, and the both ends of safety cover extend to first to both sides respectively, the second bearing box, and with first, second bearing box sealing connection, thereby the safety cover communicates with first and second bearing box inside airtight, on this basis, the safety cover is connected with back oil pipe way, utilize oil mist fan 18 and the oil station oil return siphon principle on the oil pipe way that returns, make first bearing box 3, form slightly big negative pressure in the second bearing box 4, first bearing box 3, the oil shelves oil leak problem in the second bearing box 4 outside has been solved, and utilize inspiratory lubricating oil cooling shaft coupling 7 because of the high-speed high temperature that produces.

The technical scheme of the invention thoroughly solves the problem of oil leakage maintenance of the oil gear and eliminates the potential safety hazard of the half-cover type shield.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and their concepts should be equivalent or changed within the technical scope of the present invention.

Claims

1. A sealed oil collecting system of a coupling of a turbine driving compressor in an MVR salt manufacturing device comprises a turbine (1) and a compressor (2), wherein a power output shaft of the turbine (1) is rotatably mounted on a first bearing box (3) through a bearing, a first oil gear (5) is arranged between the power output shaft of the turbine (1) and the first bearing box (3), a power input shaft of the compressor (2) is rotatably mounted on a second bearing box (4) through a bearing, a second oil gear (6) is arranged between the power input shaft of the compressor (2) and the second bearing box (4), and the power output shaft of the turbine (1) is in transmission connection with the power input shaft of the compressor (2) through a coupling (7) located between the first bearing box (3) and the second bearing box (4);

the method is characterized in that: still establish tubulose safety cover (8) on shaft coupling (7) along the axial cover of shaft coupling, and with the time oil pipe way of safety cover (8) intercommunication, the both ends of safety cover (8) respectively with first bearing box (3), second bearing box (4) sealing connection, be equipped with oil mist fan (18) on the time oil pipe way for keep negative pressure in safety cover (8), first bearing box (3) and second bearing box (4).

2. The turbine drive compressor coupling seal oil collecting system in the MVR salt manufacturing device according to claim 1, wherein: a metal soft joint (14) is arranged on the oil return pipeline;

and/or an oil return valve (16) is arranged on the oil return pipeline;

and/or a sight glass (15) is arranged on the oil return pipeline.

3. The turbine drive compressor coupling seal oil collecting system in the MVR salt manufacturing device according to claim 1, wherein: the coupler (7) is a diaphragm type coupler, and an air inlet is formed in the position, right facing the coupler diaphragm (7-1), on the protective cover (8).

4. The turbine drive compressor coupling seal oil collecting system in the MVR salt manufacturing device according to claim 3, wherein: the air conditioner is characterized by further comprising an air inlet pipe (9), wherein a filter (11) is arranged at the air inlet end of the air inlet pipe (9), and the air outlet end of the air inlet pipe (9) is hermetically connected with the air inlet.

5. The turbine drive compressor coupling seal oil collecting system in the MVR salt manufacturing device according to claim 4, wherein: and reinforcing ribs (10) are arranged between the 2 air inlet pipes (9).

6. The turbine drive compressor coupling seal oil collecting system in the MVR salt manufacturing device according to claim 1, wherein: an oil tank (17) is arranged on the oil return pipeline, and the oil tank (17) and the oil mist fan (18) are sequentially arranged along the flowing direction of fluid in the oil return pipeline.

7. The turbine drive compressor coupling seal oil collecting system in the MVR salt manufacturing device according to claim 1, wherein: the first oil gear (5) is a handle type oil gear, and the second oil gear (6) is an embedded type oil gear.

8. The turbine drive compressor coupling seal oil collecting system in the MVR salt manufacturing device according to claim 1, wherein: the protective cover (8) is in flexible sealing connection with the first bearing box (3) and/or the protective cover (8) is in flexible sealing connection with the second bearing box (4).

9. The turbine drive compressor coupling seal oil collecting system in MVR salt manufacturing device according to claim 8, characterized in that: the protection cover (8) is connected with the first bearing box (3) in a flexible sealing mode through a packing, and/or the protection cover (8) is connected with the second bearing box (4) in a flexible sealing mode through a packing.

10. The turbine drive compressor coupling seal oil collecting system in MVR salt manufacturing device according to claim 8, characterized in that: one end of the protective cover (8) is in flexible sealing connection with the first bearing box (3) through a packing, and the other end of the protective cover (8) is in rigid sealing connection with the second bearing box (4) through a bolt and a nut;

or one end of the protective cover (8) is flexibly and hermetically connected with the second bearing box (4) through a packing, and the other end of the protective cover (8) is rigidly and hermetically connected with the first bearing box (3) through a bolt and a nut;

the protective cover (8) is formed by detachably splicing an upper semicircular protective cover and a lower semicircular protective cover.