CN219241995U

CN219241995U - Oil leakage prevention coupler shield

Info

Publication number: CN219241995U
Application number: CN202320144390.4U
Authority: CN
Inventors: 薛良; 王文言; 祖廷勇; 潘海洋
Original assignee: Jiangsu Zhongsheng Clean Energy Co ltd
Current assignee: Jiangsu Zhongsheng Clean Energy Co ltd
Priority date: 2023-02-07
Filing date: 2023-02-07
Publication date: 2023-06-23
Anticipated expiration: 2033-02-07

Abstract

The utility model relates to an oil leakage prevention coupler shield, which comprises a main shield and an auxiliary shield which are coaxially arranged and mutually communicated, wherein the main shield and the auxiliary shield are cylindrical, the main shield is used for protecting one side of a coupler, which is close to a generator, an annular guard plate is arranged on one side surface of the main shield, which is close to the generator, and the inner circle of the annular surface of the guard plate is close to the coupler; the auxiliary cover is used for being matched with the main cover to provide protection for one side, close to the reduction gearbox, of the coupling, the auxiliary cover is arranged on one side, far away from the guard plate, of the main cover, and a plurality of groups of through holes are uniformly formed in the auxiliary cover body along the axial direction of the auxiliary cover body. The utility model can effectively improve the oil leakage phenomenon of the generator set, further reduce the productive noise caused by the oil leakage phenomenon, and realize the safe and noise-reducing operation of the generator set.

Description

Oil leakage prevention coupler shield

Technical Field

The utility model relates to the technical field of transmission devices, in particular to an oil leakage prevention coupler shield.

Background

The turbo generator is a generator driven by a steam turbine, and has the advantages of high single machine power, high efficiency, stable operation and the like compared with other prime movers. Among them, turbo units are widely used in power plants. The turbo generator set is used as a core part of the power plant, and if any problem occurs in the operation process of the turbo generator set, unpredictable economic loss can be brought to the power plant. Therefore, any problem of the turbo generator set should be emphasized and solved in time.

Among the problems which easily occur in the operation process of the steam turbine generator unit, the problem of oil leakage is particularly remarkable. It is known that oil leakage problems occur at the turbine, gearbox and generator shaft diameters, and become more serious as their rotational speeds and oil temperatures increase. According to analysis, oil leakage problems of devices such as a gear box in a steam turbine generator set are caused by the fact that lubricating oil at the shaft diameter of the device forms oil mist which is easy to overflow from gaps at the connecting positions of parts at high temperature in the operation process, and the oil mist is solidified and attached to a machine body after overflowing. More specifically, analysis shows that the reduction gearbox and the generator coupling protective cover are completely closed at one side close to the reduction gearbox, one side close to the generator is not closed, the rotor is equivalent to an axial flow fan in the high-speed rotation process, an inlet is arranged at one side close to the reduction gearbox, an outlet is arranged at one side close to the generator, negative pressure with a suction effect is formed at the inlet, and gas-liquid mixed lubricating oil in the reduction gearbox is continuously sucked and thrown out from the outlet. The higher the rotor speed, the more power the blower will be and the more oil will be thrown off. For a long time, leaked oil seriously threatens the normal operation of the turbo generator set.

In the prior art, conventional means for coping with the oil leakage problem are as follows: and (3) reserving gaps at the joints of the reduction gearbox and other components in the unit. However, the method only has a relief effect on the oil leakage condition, can not thoroughly solve the oil leakage problem of the unit, and is easy to form larger noise and air turbulence, so that the unit is more severe in operation field environment. Based on this, this application has proposed an leak protection oil shaft coupling guard shield for solve the generating set and frequently seen oil leak problem in the operation process.

Disclosure of Invention

The utility model aims to provide an oil leakage prevention coupler shield which is used for solving the problem of oil leakage easily occurring at the shaft diameter part of a high-speed steam turbine generator unit, and the technical effect of improving the oil leakage phenomenon of a gear box is achieved by adjusting the internal pressure of a reduction gearbox to inhibit oil from overflowing.

In order to achieve the above object, the present utility model provides the following solutions:

an oil leakage prevention coupling shield for protection of a coupling of a generator in driving connection with a reduction gearbox, comprising: a main cover and an auxiliary cover which are coaxially arranged and communicated with each other;

the main cover is of a cylindrical hollow structure, an annular guard plate is arranged on one side surface of the main cover, which is close to the generator, and the inner circle of the annular surface of the guard plate is close to the coupler;

the auxiliary cover is cylindrical, the auxiliary cover is arranged on one side surface of the main cover, which is far away from the guard plate, and a plurality of groups of through holes are uniformly formed in the auxiliary cover body along the axial direction of the auxiliary cover body.

Further, the distance between the inner circle of the annular surface of the guard plate and the coupler is 1 mm-2 mm.

Further, the auxiliary cover is close to one side of the reduction gearbox and extends radially to form a circular support, a plurality of fixing holes are formed in the circular support, and the auxiliary cover is connected to the reduction gearbox through the fixing holes in a bolt mode.

Further, the main cover comprises an upper main cover and a lower main cover, and the upper main cover and the lower main cover surround to form a cylindrical main cover body; the auxiliary cover comprises an upper auxiliary cover and a lower auxiliary cover, and the upper auxiliary cover and the lower auxiliary cover are encircled to form a cylindrical auxiliary cover body.

Further, the upper main cover and the lower main cover, and the upper auxiliary cover and the lower auxiliary cover are respectively symmetrical and are sleeved outside the coupler in a detachable mode.

Further, the connection parts of the upper main cover, the lower main cover, the upper auxiliary cover and the lower auxiliary cover extend outwards along the radial direction of the connection parts to form a boss-shaped installation part, a plurality of installation holes are formed in the installation part, and the upper main cover, the lower main cover, the upper auxiliary cover and the lower auxiliary cover are connected through bolts through the installation holes.

Further, the upper main cover is provided with a lifting lug, and the lifting lug is perpendicular to the installation plane of the upper main cover and the lower main cover.

Further, the auxiliary cover further comprises a rib plate, and the rib plate is arranged outside the upper auxiliary cover and/or the lower auxiliary cover.

Further, each group of through holes is arranged on the same annular section of the auxiliary cover.

Further, the through holes are in three groups.

The beneficial effects are that:

according to the technical scheme, the oil leakage prevention coupler shield is provided, the shield body arranged on the coupler and used for connecting the generator and the reduction gearbox is closed close to one side of the generator and a gap with a certain distance from the coupler is reserved, meanwhile, the shield body is provided with the through hole for destroying the vacuum state of the shield body during system operation, the suction effect of the shield body on lubricating oil on one side of the shield body close to the reduction gearbox is weakened, the reduction gearbox is enabled to rotate at a high speed in the rotor to enable the interior of the reduction gearbox to maintain a relatively stable micro negative pressure state, the oil leakage phenomenon of the reduction gearbox group is effectively improved, productive noise caused by the oil leakage phenomenon is further reduced, and the safe and noise reduction operation of the generator set is realized.

It should be understood that all combinations of the foregoing concepts, as well as additional concepts described in more detail below, may be considered a part of the inventive subject matter of the present disclosure as long as such concepts are not mutually inconsistent.

The foregoing and other aspects, embodiments, and features of the present teachings will be more fully understood from the following description, taken together with the accompanying drawings. Other additional aspects of the utility model, such as features and/or advantages of the exemplary embodiments, will be apparent from the description which follows, or may be learned by practice of the embodiments according to the teachings of the utility model.

Drawings

The drawings are not intended to be drawn to scale. In the drawings, each identical or nearly identical component that is illustrated in various figures may be represented by a like numeral. For purposes of clarity, not every component may be labeled in every drawing. Embodiments of various aspects of the utility model will now be described, by way of example, with reference to the accompanying drawings, in which:

FIG. 1 is a side view of a planar structure of a shield in an embodiment of the present application;

FIG. 2 is a cross-sectional view taken along the direction A-A in FIG. 1 in an embodiment of the present application;

fig. 3 is a cross-sectional view taken along the direction B-B in fig. 2 in an embodiment of the present application.

In the drawings, the meanings of the reference numerals are as follows:

1-main cover, 11-upper main cover, 12-lower main cover, 2-auxiliary cover, 21-upper auxiliary cover, 22-lower auxiliary cover, 3-guard plate, 4-through hole, 5-support, 51-fixed hole, 6-installation part, 61-installation hole, 7-lifting lug, 8-rib plate and 9-support.

Detailed Description

In order to make the purpose and technical solution of the embodiments of the present utility model more clear, the technical solution of the present utility model will be clearly and completely described below in connection with the embodiments of the present utility model. It will be apparent that the described embodiments are some, but not all, embodiments of the utility model. All other embodiments, which can be made by a person skilled in the art without creative efforts, based on the described embodiments of the present utility model fall within the protection scope of the present utility model.

It will be understood by those skilled in the art that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the prior art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.

In the prior art, in the operation process of the turbo generator set, a shield is usually additionally arranged outside the coupling for connecting the generator and the reduction gearbox, so that the influence of the external environment on the coupling is reduced, the normal operation of the whole turbo generator set is further ensured, and the new problem occurs: and the oil leakage problem at the shaft diameter of the connecting generator and the reduction gearbox. In actual production, conventional means for coping with oil leakage problems are: and a gap is reserved at the connection part of the gearbox and other components in the unit. However, the method only has a relief effect on the oil leakage condition, can not thoroughly solve the oil leakage problem of the unit, and is easy to form larger noise and air turbulence, so that the unit is more severe in operation field environment. In view of this, this application proposes a leak protection oil shaft coupling guard shield, through further narrowing the distance that sets up the cover body that plays the guard action and the diameter of axle department outside the shaft coupling that is used for connecting generator and reducing gear box to set up multiunit through-hole in cover body one side near the reducing gear box in order to destroy its inside vacuum state, utilizes aerodynamic principle, makes its inside state that forms little negative pressure of gear box in the operation process, thereby reduces the spill over of lubricating oil.

Based on the above basic concept, the components according to the present embodiment include a main casing 1 and a sub casing 2 as shown in fig. 1 and 2, the main casing 1 and the sub casing 2 being coaxially disposed and communicating with each other.

The main cover 1, the main cover 1 is cylindric hollow structure, be provided with annular backplate 3 on the main cover 1 is close to one side of generator, the interior circle of backplate 3 torus is close to the shaft coupling.

The auxiliary cover 2, the auxiliary cover 2 is cylindric, the auxiliary cover 2 set up in the main cover 1 keep away from on the side of backplate 3, evenly be provided with a plurality of groups of through-holes 4 on the auxiliary cover 2 cover body along its axial direction.

In the above structure, the main cover is used for providing protection for one side of the coupling close to the generator, the auxiliary cover is matched with the main cover 1 to provide protection for one side of the coupling close to the reduction gearbox, wherein the main cover 1 is close to one side of the generator, the cover body is closed by the guard plate 3, so that the inner circle of the circular surface of the guard plate 3 is close to the rotating shaft as much as possible, meanwhile, the auxiliary cover 2 is close to one side of the reduction gearbox, a plurality of groups of through holes 4 are arranged, the vacuum state in the cover body can be further destroyed, the guard plate 3 and the through holes 4 act together, and the pressure difference in the cover body and the outside is eliminated, so that the suction effect of the main cover 1 on one side of the reduction gearbox is weakened when the rotating shaft connecting the generator and the reduction gearbox rotates at a high speed, and the inside of the reduction gearbox is in a micro negative pressure state to avoid lubricating oil overflow when the generator set operates, thereby effectively reducing the occurrence of oil leakage phenomenon.

In order to further ensure that one side of the guard plate 3 in the structure plays a better sealing effect while not obstructing the high-speed rotation of the rotating shaft, the distance between the inner circle of the circular ring surface of the guard plate 3 and the shaft diameter of the coupler is 1 mm-2 mm. During actual installation, the distance can be adjusted in the range according to the actual operation condition of the generator set, such as the rotating speed of the rotating shaft, so as to ensure the oil leakage prevention effect. In this embodiment, in order to achieve a better sealing effect in combination with the above structure, as shown in fig. 2, the through holes 4 are three groups, and each group of through holes 4 is disposed on the same annular tangential plane of the auxiliary cover 2, so that the air flow inside and outside the cover body of the protective cover is more uniform and stable when the rotating shaft rotates at a high speed.

When the conventional coupling shield is used, most of the conventional coupling shields are installed and fixed by using a bracket arranged on the ground. As shown in fig. 3, in this embodiment, besides the support 9 shown in fig. 1 is used for supporting, a fixing structure is further provided on a connection side of the auxiliary cover 2 and the reduction gearbox to further ensure the overall stability of the cover body, and the specific structure adopted is as follows: the auxiliary cover 2 is close to one side of the reduction gearbox and extends radially to form a circular support 5, a plurality of fixing holes 51 are formed in the circular support, and the auxiliary cover 2 is connected to the reduction gearbox through the fixing holes 51 in a bolt mode.

Considering that the volume of the shield is usually larger when the shield is applied to a large-sized generator set, the main cover 1 and the auxiliary cover 2 are arranged in a spliced mode for installation or maintenance in the embodiment, wherein, as shown in fig. 1 and 2, the main cover 1 comprises an upper main cover 11 and a lower main cover 12, and the upper main cover 11 and the lower main cover 12 surround to form a cylindrical cover body of the main cover 1; as shown in fig. 2, the sub-cover 2 includes an upper sub-cover 21 and a lower sub-cover 22, and the upper sub-cover 21 and the lower sub-cover 22 surround to form a cylindrical cover body of the sub-cover 2. The upper main cover 11 and the lower main cover 12, and the upper sub cover 21 and the lower sub cover 22 are respectively symmetrical and are detachably sleeved outside the coupling.

In this embodiment, the detachable installation of the split structure may be achieved by the following structure: the connection parts of the upper main cover 11 and the lower main cover 12 and the upper auxiliary cover 21 and the lower auxiliary cover 22 extend outwards along the radial direction of the connection parts to form a boss-shaped mounting part 6, a plurality of mounting holes 61 are formed in the mounting part 6, and the upper main cover 11 and the lower main cover 12 are connected with the upper auxiliary cover 21 and the lower auxiliary cover 22 through the mounting holes 61 in a bolt manner.

In installation, particularly for initial use, the shield should be installed after the reduction gearbox is in place. The mounting sequence is performed sequentially from the lower half cover, i.e., the lower main cover 12 and the lower sub cover 22 that are connected, to the lower half cover, i.e., the upper main cover 11 and the lower sub cover 22 that are connected. The lower half of the protective cover is aligned with the bracket matched with the protective cover and the screw holes formed in the reduction gearbox, and is fastened by bolts, and the upper half of the protective cover is fastened by bolts corresponding to the screw holes formed in the upper half of the protective cover, namely the mounting holes 61 in the mounting part 6. The order of disassembly is reverse to the order of installation. In this embodiment, in order to facilitate the above installation process, the upper main cover 11 is provided with a lifting lug 7, and the upper main cover 11 and the upper auxiliary cover 21 connected thereto can be lifted directly by the lifting lug 7 by using a lifting apparatus. As shown in fig. 2, the auxiliary cover 2 is further provided with a rib plate 8, and the rib plate 8 plays a supporting role on the auxiliary cover 2, so that deformation of the cover body during use, particularly under the condition of bearing a large load, is avoided.

While the utility model has been described with reference to preferred embodiments, it is not intended to be limiting. Those skilled in the art will appreciate that various modifications and adaptations can be made without departing from the spirit and scope of the present utility model. Accordingly, the scope of the utility model is defined by the appended claims.

Claims

1. An oil leakage prevention coupler shield for the protection of a coupler in transmission connection with a reduction gearbox of a generator, comprising: a main cover (1) and a secondary cover (2) which are coaxially arranged and are mutually communicated;

the main cover (1), the main cover (1) is of a cylindrical hollow structure, an annular guard plate (3) is arranged on one side surface of the main cover (1) close to the generator, and the inner circle of the annular surface of the guard plate (3) is close to the coupler;

the auxiliary cover (2), auxiliary cover (2) are cylindric, auxiliary cover (2) set up in main cover (1) keep away from on the side of backplate (3), be provided with a plurality of groups of through-holes (4) on auxiliary cover (2) cover body along its axial direction on evenly.

2. The shroud of claim 1, wherein: the distance between the inner circle of the circular surface of the guard plate (3) and the coupler is 1 mm-2 mm.

3. The shroud of claim 1, wherein: the auxiliary cover (2) is close to one side of the reduction gearbox and extends radially to form a circular support (5), a plurality of fixing holes (51) are formed in the circular support, and the auxiliary cover (2) is connected to the reduction gearbox through the fixing holes (51) in a bolt mode.

4. The shroud of claim 1, wherein: the main cover (1) comprises an upper main cover (11) and a lower main cover (12), and the upper main cover (11) and the lower main cover (12) are surrounded to form a cylindrical cover body of the main cover (1); the auxiliary cover (2) comprises an upper auxiliary cover (21) and a lower auxiliary cover (22), and the upper auxiliary cover (21) and the lower auxiliary cover (22) are surrounded to form a cylindrical cover body of the auxiliary cover (2).

5. The shroud as claimed in claim 4, wherein: the upper main cover (11) and the lower main cover (12), the upper auxiliary cover (21) and the lower auxiliary cover (22) are respectively symmetrical and are sleeved outside the coupler in a detachable mode.

6. The shroud as claimed in claim 5, wherein: the upper main cover (11) and the lower main cover (12) and the upper auxiliary cover (21) and the lower auxiliary cover (22) are connected along the radial extension of the connecting part to form a boss-shaped mounting part (6), a plurality of mounting holes (61) are formed in the mounting part (6), and the upper main cover (11) and the lower main cover (12) are connected with the upper auxiliary cover (21) and the lower auxiliary cover (22) through the mounting holes (61) through bolts.

7. The shroud as claimed in claim 4, wherein: the upper main cover (11) is provided with a lifting lug (7), and the lifting lug (7) is perpendicular to the installation plane of the upper main cover (11) and the lower main cover (12).

8. The shroud as claimed in claim 4, wherein: the auxiliary cover (2) further comprises a rib plate (8), and the rib plate (8) is arranged outside the cover body of the upper auxiliary cover (21) and/or the lower auxiliary cover (22).

9. The shroud of claim 1, wherein: each group of through holes (4) is arranged on the same annular section of the auxiliary cover (2).

10. The shroud of claim 1, wherein: the through holes (4) are three groups.