Connected bearing seat structure

Abstract

A one-piece bearing seat structure comprises a bearing seat, a shaft cavity allowing a shaft to penetrate through is formed in the center of the bearing seat, bearing containing cavities communicated with the shaft cavity are formed in the two ends of the bearing seat, and rolling bearings are sealed in the corresponding bearing containing cavities through bearing covers at the two ends of the bearing seat; a lubricating grease cavity is formed in the bearing accommodating cavity on the outer side of the rolling bearing; an oil injection hole communicated with the lubricating grease cavity is formed in the outer side of the end part of the bearing seat; cooling medium cavities surrounding the outer sides of the corresponding bearing containing cavities are independently arranged at the two ends of the bearing seat respectively, one cooling medium cavity is provided with a cooling medium inlet, the other cooling medium cavity is provided with a cooling medium outlet, and the two cooling medium cavities are communicated through an outer circulation pipe to form a single circulation pipeline. According to the one-piece bearing seat structure, the risks of oil leakage and water leakage are reduced, the heat dissipation effect is good, and meanwhile installation is convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of one-piece bearing seats, in particular to a one-piece bearing seat structure. Background Art

[0002] Centrifugal fans operating in high temperature environments will have bearing temperatures exceeding the specified limit due to the high ambient temperature and the temperature of the gas inside the fan, which will affect the service life of the bearing and the fan. The existing technology is basically oil-lubricated water-cooled split or conjoined bearing seats, and the front and rear bearings generally have separate circulating water channels. The following problems have been found in actual use:

[0003] 1. Since the one-piece bearing seat has a certain length, when the whole is lubricated with oil, the amount of lubricating oil is large, the heat dissipation effect is general, and there is a risk of oil leakage;

[0004] 2. Two separate circulating waterways require four interfaces to be installed when in use, which has low installation efficiency and there is a risk of water leakage when the connection is not tight;

[0005] 3. When using oil lubrication, the middle section of the bearing seat lacks cooling medium, resulting in poor heat dissipation. Utility Model Content

[0006] The utility model aims to provide a one-piece bearing seat structure, which reduces the risk of oil and water leakage, has a good heat dissipation effect, and is convenient for installation.

[0007] The technical solution adopted by the utility model is: a one-piece bearing seat structure, comprising a bearing seat, a shaft cavity for the shaft to pass through is arranged at the center of the bearing seat, and bearing accommodating cavities connected to the shaft cavity are arranged at both ends, and the rolling bearings are enclosed in the corresponding bearing accommodating cavities at both ends of the bearing seat through bearing covers;

[0008] A grease cavity is formed in the bearing accommodation cavity outside the rolling bearing, and an oil filling hole communicating with the grease cavity is provided on the outer side of the end of the bearing seat;

[0009] Both ends of the bearing seat are separately provided with cooling medium cavities surrounding the outside of the corresponding bearing accommodating cavity, one cooling medium cavity is provided with a cooling medium inlet, and the other cooling medium cavity is provided with a cooling medium outlet. The two cooling medium cavities are connected by an external circulation pipe to form a single circulation pipeline.

[0010] As a preferred embodiment, the outer ring of the rolling bearing is confined in an annular cavity formed by the outer circumferential wall of the bearing accommodating cavity and the bearing cover, and the inner ring of the rolling bearing is fixed to the shaft by a positioning ring and a locking device, so that the gap between the outer ring and the inner ring of the rolling bearing is connected to the grease cavity.

[0011] As a preferred solution, the locking device includes a locking washer and a locking nut sleeved on the shaft, and the locking nut is pressed on the outer side of the locking washer.

[0012] As a preferred solution, the angle between the center line of the oil filling hole and the center line of the bearing seat is an acute angle.

[0013] As a preferred solution, the shaft cavity in the two bearing accommodating cavities is an annular cavity, and a protective cover is detachably connected to the side wall of the middle section of the bearing seat, and a hole connecting the annular cavity is provided on the protective cover.

[0014] As a preferred solution, the single cooling medium cavity is in an annular shape as a whole.

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] 1. A grease cavity is set at the bearing position to lubricate the rolling bearing with grease. Compared with oil lubrication, it is not easy to leak. The heat is taken away by the cooling water in the cooling medium cavity, which is suitable for operation in high temperature environment.

[0017] 2. The cooling medium cavities of the front and rear bearings are connected through an external circulation pipe to form a single circulating water channel. During installation or construction, only the other two cooling interfaces need to be connected to the external water cooling pipeline, which is convenient for pipe connection and improves installation efficiency;

[0018] Reducing the number of interfaces during the construction process can also reduce cooling water leakage caused by lax installation.

[0019] 3. The heat density of the non-bearing position of the bearing seat is small, and a protective cover with perforations is designed to dissipate heat by natural cooling of the gas medium. It does not need to be immersed in grease, which reduces the amount of grease used. It has a small size and low cost, and can meet the heat dissipation requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 It is an overall top view schematic diagram of the utility model;

[0022] Figure 2 It is a schematic side view of the whole of the utility model;

[0023] Figure 3 for Figure 2 Schematic diagram of the cross section at the middle BB;

[0024] Figure 4 for Figure 3 A magnified schematic diagram of the local structure;

[0025] Figure 5 It is an overall front view schematic diagram of the utility model.

[0026] Figure numerals: 1. bearing seat, 2. bearing accommodating cavity, 3. bearing cover, 4. rolling bearing, 5. oil filling hole, 6. cooling medium cavity, 7. external circulation pipe, 8. positioning ring, 9. locking gasket, 10. locking nut, 11. protective cover, 12. hollow hole. DETAILED DESCRIPTION

[0027] The present invention is described in detail below by way of exemplary embodiments. However, it should be understood that, without further description, elements, structures and features in one embodiment may also be beneficially combined in other embodiments.

[0028] It should be noted that: unless otherwise defined, the technical terms or scientific terms used in this article should be understood by people with ordinary skills in the field to which the utility model belongs. The words "one", "an" or "the" and the like used in the patent application specification and claims of this utility model do not express quantitative restrictions, but indicate the existence of at least one; the "first", "second" and "third" used in this article should not be regarded as restrictions on the order of components, but are only used to distinguish different components; "include" or "comprise" and other similar words indicate that the elements or objects appearing before "include" or "comprise" include the elements or objects listed after "include" or "comprise" and their equivalents, but do not exclude other elements or objects with the same function.

[0029] In order to more clearly describe the specific structural composition of the one-piece bearing seat structure, Figure 1-5 Describe this embodiment:

[0030] like Figure 1 , Figure 2 and Figure 3 As shown, the one-piece bearing seat involved includes a bearing seat 1, a shaft cavity for the shaft to pass through is arranged at the center of the bearing seat 1, and bearing accommodating cavities 2 connected to the shaft cavity are arranged at both ends. The rolling bearings 4 are enclosed in the corresponding bearing accommodating cavities 2 through bearing covers 3 at both ends of the bearing seat 1, and bolt holes are arranged at the ends of the bearing cover and the bearing seat, and are connected by bolts;

[0031] See also Figure 4 In the present invention, a grease cavity is formed in the bearing accommodating cavity 2 outside the rolling bearing 4, and an oil injection hole 5 communicating with the grease cavity is provided on the outer side of the end of the bearing seat 1; the grease cavity is provided at the bearing position to lubricate the rolling bearing 4 with grease, which is less likely to leak than oil lubrication, and the heat is taken away by the cooling water in the cooling medium cavity, which is suitable for operation in a high temperature environment;

[0032] The specific installation position of the rolling bearing 4 is: the outer ring of the rolling bearing 4 is confined in the annular cavity formed by the outer circumferential wall of the bearing accommodating cavity 2 and the bearing cover 3, and the inner ring of the rolling bearing 4 is fixed on the shaft through the positioning ring 8 and the locking device, so that the gap between the outer ring and the inner ring of the rolling bearing 4 is connected to the grease cavity, so that the grease can contact the roller or ball of the roller bearing 4 to play a lubricating role, and the locking device includes a locking washer 9 and a locking nut 10 sleeved on the shaft, and the locking nut 10 is pressed on the outside of the locking washer 9. In the specific design, in order to improve the concentricity of the shaft and make the shaft more stable and smooth in the working state, the two rolling bearings can respectively use deep groove ball bearings and roller bearings.

[0033] In the above embodiment, the included angle between the center line of the oil filling hole 5 and the center line of the bearing seat 1 is an acute angle, and grease is added into the grease cavity through the oil filling hole 5 .

[0034] See also Figure 1 and Figure 4 , cooling medium cavities 6 surrounding the outer side of the corresponding bearing accommodating cavity 2 are separately arranged at both ends of the bearing seat 1, one cooling medium cavity 6 is provided with a cooling medium inlet, and the other cooling medium cavity 6 is provided with a cooling medium outlet, and the two cooling medium cavities 6 are connected through an external circulation pipe 7 to form a single circulation pipeline;

[0035] The heat generated in the bearing housing cavity 2 under working condition is taken away by the flow of cooling medium. Figure 1 For example, there are four cooling interfaces (101, 102, 103, 104) in total, where cooling interfaces 102 and 104 are connected to the two ends of the external circulation pipe 7 respectively, and cooling interfaces 101 and 103 are used as the cooling medium inlet and cooling medium outlet respectively. The two cooling medium cavities 6 of the front and rear bearing positions are connected by the external circulation pipe 7 to form a single circulating waterway. Since the external circulation pipe 7 is part of the finished product, it is only necessary to connect the cooling medium inlet and cooling medium outlet in series on the external water cooling pipeline during installation, which is convenient for pipe connection and improves installation efficiency. The cooling water passes through 101, one of the cooling medium cavities 6, 102, the external circulation pipe 7, 104, and the other cooling medium cavity 6, 103 in sequence.

[0036] In the above embodiment, the single cooling medium cavity 6 is in an annular shape as a whole.

[0037] See also Figure 1 and Figure 5The shaft cavity between the two bearing accommodating cavities 2 is an annular cavity, and a protective cover 11 is detachably connected to the side wall of the middle section of the bearing seat 1. The protective cover 11 is provided with a hollow hole 12 connected to the annular cavity. The heat density of the non-bearing position of the bearing seat is relatively small, but due to the heat conduction of the shaft, the temperature value of the heat inside the annular cavity is still higher than the external environment. The internal heat is transferred outward through the hollow hole 12 on the protective cover 11. The annular cavity part does not need to be immersed in grease, which reduces the amount of grease used, has a small volume, and low cost, while being able to meet the heat dissipation requirements.

[0038] The parts not described in detail in this embodiment are prior art.

[0039] It should be noted that although the utility model is described through the above embodiments, the utility model can also have other multiple embodiments. Without departing from the spirit and scope of the utility model, it is obvious that those skilled in the art can make various corresponding changes and deformations to the utility model, but these changes and deformations should all fall within the scope of protection of the attached claims of the utility model and their equivalents.

Claims

1. A one-piece bearing seat structure, characterized in that: The bearing seat (1) comprises a shaft cavity for a shaft to pass through arranged at the center of the bearing seat (1), bearing accommodating cavities (2) connected to the shaft cavity are arranged at both ends, and rolling bearings (4) are enclosed in corresponding bearing accommodating cavities (2) at both ends of the bearing seat (1) via bearing covers (3); A grease cavity is formed in the bearing accommodating cavity (2) outside the rolling bearing (4), and an oil injection hole (5) communicating with the grease cavity is provided on the outside of the end of the bearing seat (1); Cooling medium cavities (6) are separately provided at both ends of the bearing seat (1) and surround the outer side of the corresponding bearing accommodating cavity (2), one cooling medium cavity (6) is provided with a cooling medium inlet, and the other cooling medium cavity (6) is provided with a cooling medium outlet, and the two cooling medium cavities (6) are connected via an external circulation pipe (7) to form a single circulation pipeline.

2. The one-piece bearing seat structure according to claim 1, characterized in that: The outer ring of the rolling bearing (4) is confined in an annular cavity formed by the outer circumferential wall of the bearing accommodating cavity (2) and the bearing cover (3), and the inner ring of the rolling bearing (4) is fixed to the shaft via a positioning ring (8) and a locking device, so that the gap between the outer ring and the inner ring of the rolling bearing (4) is connected to the grease cavity.

3. The one-piece bearing seat structure according to claim 2, characterized in that: The locking device comprises a locking washer (9) and a locking nut (10) which are sleeved on the shaft, and the locking nut (10) is pressed on the outer side of the locking washer (9).

4. The one-piece bearing seat structure according to claim 1, characterized in that: The included angle between the center line of the oil filling hole (5) and the center line of the bearing seat (1) is an acute angle.

5. The one-piece bearing seat structure according to claim 1, characterized in that: The shaft cavity located in the two bearing accommodating cavities (2) is an annular cavity. A protective cover (11) is detachably connected to the side wall of the middle section of the bearing seat (1). The protective cover (11) is provided with a hollow hole (12) communicating with the annular cavity.

6. The one-piece bearing seat structure according to claim 1, characterized in that: The single cooling medium cavity (6) is in the shape of a circular ring as a whole.

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