A kind of flow guide box suitable for 300MW unit coal mill bearing bush lubricating oil

Abstract

The present application belongs to the technical field of coal mill, and discloses a drainage box suitable for 300MW unit coal mill bearing bush lubricating oil, which comprises a bearing bush for supporting a main shaft of the coal mill, an oil groove is circumferentially arranged on the inner cylindrical surface of the bearing bush, an oil hole is arranged on the wall of the oil groove, and the drainage box and the drainage plate are further included, the drainage box is arranged on the outer wall of the bearing bush, one end of the drainage plate is connected with the drainage box, the drainage plate is surrounded at the lower part of the bearing bush and is in contact with the outer wall of the bearing bush. The present application can make the bearing bush lubricating oil contact the bearing bush uniformly and in a large area by adding the lubricating oil drainage box and the drainage plate, so as to achieve good lubrication and temperature control effects and ensure the safe and stable operation of the coal mill under the condition of high ambient temperature.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of coal mill, especially to a drainage box suitable for 300MW unit coal mill bearing bush lubricating oil. BACKGROUND

[0002] During the rotation of the coal mill tank body, the bearing bush at both ends plays a supporting role, and bearing bush lubrication and temperature control are the prerequisite for ensuring the safe rotation of the coal mill. At present, the lubricating oil is pumped from the ground oil tank to the top of the bearing bush and then sprayed through a row of oil holes for lubrication and cooling. However, during the spraying process, the oil sprayed from the oil holes may not completely cover the bearing bush, especially when individual oil holes are blocked, which makes it difficult to ensure the temperature of the bearing bush. In particular, in the case of high summer ambient temperature, the frequency of high bearing bush temperature will increase significantly, and the coal mill may need to be temporarily shut down in emergency, affecting the normal and stable operation of the unit.

[0003] Therefore, it is necessary to optimize the design of the lubricating oil drainage of the bearing bush of the coal mill, and to design a drainage box that can evenly spread the lubricating oil on the surface of the bearing bush, thereby increasing the contact area and time of the lubricating oil with the bearing bush, controlling the temperature of the bearing bush, and ensuring the safe operation of the coal mill. SUMMARY

[0004] In order to overcome the above-mentioned shortcomings of uneven lubricating oil coating on the bearing bush in the prior art, which can easily cause the temperature of the bearing bush to be too high, the technical problem of the present application is to provide a drainage box suitable for 300MW unit coal mill bearing bush lubricating oil, which can evenly coat lubricating oil on the bearing bush.

[0005] The technical embodiment of the present application is a drainage box suitable for 300MW unit coal mill bearing bush lubricating oil, which comprises a bearing bush for supporting the main shaft of the coal mill, an oil groove is arranged circumferentially on the inner cylindrical surface of the bearing bush, and an oil hole is arranged on the wall of the oil groove; further comprising a flow collecting box and a drainage plate, the flow collecting box is arranged on the outer wall of the bearing bush, one end of the drainage plate is connected with the flow collecting box, the drainage plate surrounds the lower part of the bearing bush and is in contact with the outer wall of the bearing bush.

[0006] Further, the flow collecting box is provided with an oil storage belly, a fluid inlet and a fluid outlet, and the upper end of the drainage plate is connected with the fluid outlet.

[0007] Further, the upper end of the flow collecting box is lower than the horizontal axis of the bearing bush.

[0008] Further, a flow guide pad is arranged between the drainage plate and the fluid outlet of the flow collecting box, and the flow guide pad is oil-absorbing fiber cotton.

[0009] Further, the flow collecting box and the drainage plate are respectively arranged symmetrically along the two sides of the bearing bush.

[0010] Further, the width of the drainage plate is the same as the length of the bearing bush.

[0011] Further, the lower end of the drainage plate is provided with an application cotton between the drainage plate and the bearing bush.

[0012] Compared with the prior art, the present application has the following advantages: the present application adds the lubricating oil collecting box and the drainage plate, so that the bearing bush lubricating oil can uniformly and in a large area contact the bearing bush, thereby achieving good lubrication and temperature control effect, and ensuring the safe and stable operation of the coal mill under the condition of high ambient temperature. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 is a side view structural schematic diagram of the present application;

[0014] Figure 2 is another structural schematic diagram of the present application;

[0015] Figure 3 is a structural schematic diagram of the collecting box and the drainage plate of the present application;

[0016] Figure 4 is a front view of the present application. DETAILED DESCRIPTION

[0017] Although the present application can be described with respect to particular applications or industries, those skilled in the art will recognize that the present application has a much broader scope. One of ordinary skill in the art will recognize that terms such as: above, below, upward, downward, etc. are used to describe the drawings and are not meant to limit the scope of the present application as defined by the appended claims. Any numerical designations such as: first or second are merely illustrative and are not intended to limit the scope of the present application in any way.

[0018] Example 1

[0019] A kind of drainage box suitable for 300MW unit coal mill bearing bush 1 lubricating oil, as Figures 1-4As shown, including for supporting the main shaft of the coal mill bearing 1, the inner cylindrical surface of the bearing 1 is circumferentially provided with oil groove, the oil groove wall is provided with oil hole, lubricating oil along the oil hole into the oil groove, then the bearing inner circle forms a layer of oil film, when the oil, part of the lubricating oil from the small hole outside the bearing 1 outer wall, the outflow of lubricating liquid plays a role in cooling bearing 1, but the lubricating oil will not be covered with the entire bearing outer wall, so the cooling effect is not good. Secondly, also includes the flow box 2 and the drainage plate 3, the flow box 2 is arranged on the outer wall of the bearing 1, one end of the drainage plate 3 is connected with the flow box 2, the drainage plate 3 is surrounded in the lower part of the bearing 1 and is in contact with the outer wall of the bearing 1. The flow box 2 is provided with oil storage belly 22, fluid inlet 21 and fluid outlet, and the upper end of the drainage plate 3 is connected with the fluid outlet. The upper end of the flow box 2 is lower than the horizontal axis of the bearing 1. The flow box 2 and the drainage plate 3 are respectively arranged symmetrically along the two sides of the bearing 1. The width of the drainage plate 3 is the same as the length of the bearing 1. The lubricating oil of the bearing 1 can be uniformly and large area contacted with the bearing by adding the lubricating oil flow box 2 and the drainage plate 3, so that the good lubrication and temperature control effect are achieved, and the safe and stable operation of the coal mill under the condition of high ambient temperature is ensured.

[0020] Example 2

[0021] A kind of flow box suitable for 300MW unit coal mill bearing 1 lubricating oil, as Figures 1-4 As shown, including for supporting the main shaft of the coal mill bearing 1, the inner cylindrical surface of the bearing 1 is circumferentially provided with oil groove, the oil groove wall is provided with oil hole, the oil hole is located in the center of the oil groove, lubricating oil along the oil hole into the oil groove, then the bearing inner circle forms a layer of oil film.

[0022] It also needs to be explained that, also includes the flow box 2 and the drainage plate 3, the flow box 2 is arranged on the outer wall of the bearing 1, one end of the drainage plate 3 is connected with the flow box 2, the drainage plate 3 is surrounded in the lower part of the bearing 1 and is in contact with the outer wall of the bearing 1. The flow box 2 is provided with oil storage belly 22, fluid inlet 21 and fluid outlet, and the upper end of the drainage plate 3 is connected with the fluid outlet. The upper end of the flow box 2 is lower than the horizontal axis of the bearing 1. The flow box 2 and the drainage plate 3 flow outlet are provided with flow guide pad 31, and the flow guide pad 31 is oleophilic fiber cotton. The flow box 2 and the drainage plate 3 are respectively arranged symmetrically along the two sides of the bearing 1. The width of the drainage plate 3 is the same as the length of the bearing 1.

[0023] The working principle of the application is basically the same as that of example 1, which will not be repeated here.

[0024] Example 3

[0025] A kind of flow box suitable for 300MW unit coal mill bearing 1 lubricating oil, as Figures 1-4As shown, including for supporting the main shaft of the coal mill bearing 1, the inner cylindrical surface of the bearing 1 is circumferentially provided with an oil groove, the oil groove wall is provided with an oil hole, further comprising a flow collector 2 and a drainage plate 3, the flow collector 2 is arranged on the outer wall of the bearing 1, one end of the drainage plate 3 is connected with the flow collector 2, the drainage plate 3 is surrounded at the lower part of the bearing 1 and is in contact with the outer wall of the bearing 1. The flow collector 2 is provided with an oil storage belly 22, a fluid inlet 21 and a fluid outlet, and the upper end of the drainage plate 3 is connected with the fluid outlet. The upper end of the flow collector 2 is lower than the horizontal axis of the bearing 1. A flow guide pad 31 is arranged between the drainage plate 3 and the fluid outlet of the flow collector 2, and the flow guide pad 31 is oil-absorbing fiber cotton. The flow collector 2 and the drainage plate 3 are symmetrically arranged along the two sides of the bearing 1. The width of the drainage plate 3 is the same as the length of the bearing 1. The lower end of the drainage plate 3 is provided with a daubing cotton 4, and the daubing cotton 4 is located between the drainage plate 3 and the bearing 1.

[0026] The embodiment is basically the same as that of embodiment 1, and will not be repeated here.

[0027] The above is only a specific embodiment of the present application, but the protection scope of the present application is not limited thereto, and any person skilled in the art can easily think of changes or replacements within the technical range disclosed by the present application, which should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

[0028] In the present application, the terms "first", "second", "third" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance: the term "multiple" means two or more than two, unless otherwise explicitly limited. The terms "mounting", "connection", "connection", "fixing" and the like should be broadly understood, for example, "connection" can be fixed connection, or detachable connection, or integrally connected; "connected" can be directly connected, or indirectly connected through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0029] The above embodiments are only for illustrating the technical concept and characteristics of the present application, and the purpose is to enable those skilled in the art to understand the content of the present application and to implement it, and cannot limit the protection scope of the present application. Any equivalent changes or modifications made in accordance with the spirit and essence of the present application should be covered within the protection scope of the present application. At present, the technical scheme of the present application has been carried out in pilot test, i.e. a smaller scale experiment before mass production of the product; after the completion of the pilot test, user use research is carried out in a small range, and the research results show that the user satisfaction is high; now start to prepare for the formal production of the product for industrialization (including intellectual property risk early warning research).

Claims

1. A lubrication box for lubricating oil in the bearing bush of a 300MW coal mill unit, comprising a bearing bush (1) for supporting the main shaft of the coal mill, wherein an oil groove is circumferentially arranged on the inner cylindrical surface of the bearing bush (1), and an oil hole is provided on the wall of the oil groove; characterized in that, It also includes a collector box (2) and a guide plate (3). The collector box (2) is located on the outer wall of the bearing (1). One end of the guide plate (3) is connected to the collector box (2). The guide plate (3) surrounds the lower part of the bearing (1) and contacts the outer wall of the bearing (1). The collection box (2) is provided with an oil storage tank (22), a fluid inlet (21) and a fluid outlet, and the upper end of the guide plate (3) is connected to the fluid outlet; A flow guide pad (31) is provided between the fluid outlet of the flow guide plate (3) and the flow collection box (2), and the flow guide pad (31) is an oil-loving fiber cotton; The lower end of the flow guide plate (3) is provided with a coating cotton (4), which is located between the flow guide plate (3) and the bearing (1).

2. The drain box for lubricating oil in the bearing bush of a 300MW coal mill as described in claim 1, characterized in that, The upper end of the collector box (2) is lower than the horizontal axis of the bearing (1).

3. The drain box for lubricating oil in the bearing bush of a 300MW coal mill as described in claim 1, characterized in that, The collector box (2) and the guide plate (3) are symmetrically arranged on both sides of the bearing (1).

4. A drain box for lubricating oil in the bearing bush of a 300MW coal mill, as described in claim 1, is characterized in that... The width of the diversion plate (3) is the same as the length of the bearing (1).

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