Bearing box with cooling structure shell

Abstract

The utility model provides a bearing box with a cooling structure shell, which comprises a main shaft, a bearing box body and a bearing, the bearing is fixedly arranged in the bearing box body, and the main shaft is arranged on the inner ring of the bearing and is rotatably connected with the bearing box body; the bearing box body comprises a first end cover, a second end cover and a bearing box shell arranged between the first end cover and the second end cover, an oil nozzle connector is arranged on the second end cover, and an annular groove is formed in the middle of the bearing box shell; the oil nozzle connector is communicated with the annular groove, and external cooling oil flows into the annular groove through the oil nozzle connector. The bearing box is simple in structure and convenient to operate, heat in the bearing box is transferred to the cooling oil in the shell through the technical means that the annular groove is formed in the shell of the bearing box and the cooling oil is introduced into the annular groove through the oil nozzle connector on the end cover, cooling is achieved when a main shaft rotates, and the service life of the main shaft is prolonged. And the temperature of the bearing box body is effectively prevented from being too high during working.

Description

Technical Field

[0001] The utility model relates to, in particular, a bearing box with a cooling structure shell. Background Art

[0002] The bearing box, also known as the winch box, is a box part that supports and lubricates the bearing. It also bears the axial and radial forces generated by the equipment during operation. The material of the bearing box is generally cast iron and cast steel. In equipment with a rotating shaft, the shaft is generally supported by the bearing to rotate, and the bearing is installed in the bearing box.

[0003] The bearing box is filled with lubricating oil to lubricate the bearing during operation. At the same time, the various forces on the bearing during operation will also be transmitted to the bearing box. Long-term operation will cause the temperature of the bearing components to rise, which will not only affect the normal use of the bearing, but also greatly reduce the service life of the bearing. Therefore, when the ambient temperature or medium temperature is high, in order to ensure the normal operation of the bearing, the temperature of the bearing box needs to be controlled. Utility Model Content

[0004] In view of the defects in the prior art, the purpose of the utility model is to provide a bearing box with a cooling structure shell.

[0005] The bearing box with a cooling structure housing provided by the utility model comprises a main shaft, a bearing box body and a bearing, wherein the bearing is fixedly installed inside the bearing box body, and the main shaft is arranged in the inner ring of the bearing and is rotatably connected to the bearing box body;

[0006] The bearing box body comprises a first end cover, a second end cover and a bearing box shell arranged between the first end cover and the second end cover, the second end cover is provided with an oil nozzle joint, and the middle part of the bearing box shell is provided with an annular groove;

[0007] The oil nozzle joint is in communication with the annular groove, and external cooling oil flows into the annular groove through the oil nozzle joint.

[0008] Preferably, the second end cover and the bearing housing shell are both provided with through holes in a direction parallel to the axial direction, and the first end cover is provided with through holes in a radial direction;

[0009] One end of the through hole on the second end cover is used to connect to external compressed air, and the other end of the through hole on the second end cover is connected to the through hole on the bearing box shell and the radial through hole on the first end cover in sequence to form a gas flow channel. The outer end of the radial through hole is provided with a sealing structure, and the inner end of the radial through hole is connected to the circumferential groove inside the first end cover.

[0010] Preferably, the main shaft is provided with a groove at a position corresponding to the circumferential groove inside the first end cover, and together they form a circumferential sealing gas path;

[0011] There are multiple gas flow channels in the bearing box body, and the multiple gas flow channels are arranged along the circumferential direction.

[0012] Preferably, there are multiple circumferential sealing air paths, which are sequentially arranged and connected in sequence along the axial direction.

[0013] Preferably, at least two groups of bearings are arranged inside the bearing box body, and a spacer ring group is arranged between adjacent groups of bearings, and two sides of the spacer ring group are overlapped with adjacent groups of bearings respectively.

[0014] Preferably, the spacer ring group includes a first spacer ring and a second spacer ring, and the first spacer ring and the second spacer ring are arranged from inside to outside in the radial direction.

[0015] Preferably, there are a plurality of annular grooves, and the plurality of annular grooves are evenly distributed in the bearing box housing along the axial direction and are connected in sequence.

[0016] Preferably, a groove is provided on the inner surface of the second end cover, a sealing ring is provided inside the groove, and the sealing ring is located between the main shaft and the second end cover.

[0017] Preferably, a second labyrinth seal protruding radially inward is provided at the end of the bearing housing shell, and a plurality of tooth structures are provided on the second labyrinth seal;

[0018] A first labyrinth seal corresponding to the second labyrinth seal is arranged on the main shaft. The first labyrinth seal is provided with a plurality of tooth structures, and is engaged and sealed with the tooth structures on the second labyrinth seal to form a labyrinth seal structure.

[0019] Preferably, a pressing piece is provided inside one end of the bearing box shell, the pressing piece is not connected to the bearing box shell, and the pressing piece is pressed against the outer ring of the bearing through a top screw inside the threaded hole on the second end cover;

[0020] A clamping bolt is fixedly arranged on the outside of one end of the main shaft, the clamping bolt is threadedly connected to the main shaft, and one side of the clamping bolt overlaps the inner ring of the bearing.

[0021] Compared with the prior art, the utility model has the following beneficial effects:

[0022] The utility model has a simple structure and is easy to operate. By arranging an annular groove in the bearing box shell and passing cooling oil to the inside of the annular groove through an oil nozzle joint on the end cover, the heat inside the bearing box is transferred to the cooling oil inside the shell, so that the temperature is reduced when the main shaft rotates, and the over-high temperature of the bearing box during operation is effectively avoided. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Other features, objects and advantages of the present invention will become more apparent by reading the detailed description of non-limiting embodiments with reference to the following drawings:

[0024] Figure 1 It is a structural schematic diagram of an embodiment of the utility model;

[0025] Figure 2 It is a structural schematic diagram of another embodiment of the utility model.

[0026] The figure shows:

[0027] Bearing housing shell 1 First labyrinth seal 8

[0028] Spindle 2 Second labyrinth seal 9

[0029] First end cover 3 Sealing ring 10

[0030] Second end cover 4 clamping bolt 11

[0031] First spacer 5 Bearing 12

[0032] Second spacer 6 Oil nozzle joint 13

[0033] Pressing piece 7 DETAILED DESCRIPTION

[0034] The utility model is described in detail below in conjunction with specific embodiments. The following embodiments will help those skilled in the art to further understand the utility model, but do not limit the utility model in any form. It should be pointed out that for those of ordinary skill in the art, several changes and improvements can be made without departing from the concept of the utility model. These all belong to the protection scope of the utility model.

[0035] The utility model discloses a bearing box with a cooling structure shell. An annular groove is arranged in the outer shell of the bearing box, and cooling oil is passed into the inner part of the annular groove through an oil nozzle joint on an end cover, so that the heat inside the bearing box is transferred to the cooling oil inside the outer shell, and the temperature is reduced when the main shaft rotates, which effectively avoids the bearing box body from overheating during operation.

[0036] According to the bearing box with cooling structure shell provided by the utility model, Figure 1As shown, it includes a main shaft 2, a bearing box body and a bearing 12, wherein the bearing 12 is fixedly installed inside the bearing box body, and the main shaft 2 is arranged on the inner ring of the bearing 12 and is rotatably connected to the bearing box body; the bearing box body includes a first end cover 3, a second end cover 4 and a bearing box housing 1 arranged between the first end cover 3 and the second end cover 4, and an oil nozzle joint 13 is arranged on the second end cover 4, and an annular groove is arranged in the middle of the bearing box housing 1; the oil nozzle joint 13 is connected to the annular groove, and external cooling oil flows into the annular groove through the oil nozzle joint 13. Cooling oil is passed into the annular groove through the oil nozzle joint on the end cover, so that the heat inside the bearing box is transferred to the cooling oil inside the housing, and the temperature is reduced when the main shaft rotates, effectively avoiding the bearing box body from being overheated during operation. Preferably, there are multiple annular grooves, and the multiple annular grooves are evenly distributed in the bearing box housing 1 along the axial direction and are connected in sequence. In a preferred example, multiple annular grooves are combined to form a spiral groove.

[0037] Furthermore, the second end cover 4 and the bearing housing shell 1 are both provided with through holes in a direction parallel to the axial direction, and the first end cover 3 is provided with through holes in a radial direction. One end of the through hole on the second end cover 4 is used to connect with external compressed air, and the other end of the through hole on the second end cover 4 is connected with the through hole on the bearing housing shell 1 and the radial through hole on the first end cover 3 in sequence to form a gas flow channel. The outer end of the radial through hole is provided with a blocking structure, and the inner end of the radial through hole is connected to the circumferential groove inside the first end cover 3. The main shaft 2 is provided with a groove at a position corresponding to the circumferential groove inside the first end cover 3, and together form a circumferential sealing gas path; the circumferential sealing gas path is multiple, and the multiple circumferential sealing gas paths are sequentially arranged and connected in sequence along the axial direction. Compressed air passes through the circumferential sealing gas path, and air pressure is formed at the grooves of the main shaft 2 and the end cover, thereby achieving sealing.

[0038] There are multiple gas flow channels in the bearing box body, and the multiple gas flow channels are arranged along the circumferential direction. The multiple gas flow channels are all used to connect with the external compressed gas device, so that air enters the bearing box shell 1 from the gas flow channel on the second end cover 4, and then enters the circumferential sealed gas path on the outer surface of the main shaft 2 through the radial through hole of the first end cover 3, and then forms air pressure in the circumferential sealed gas path to prevent dust and other impurities in the external environment from entering the bearing box.

[0039] At least two groups of bearings 12 are arranged inside the bearing box body, and a spacer group is arranged between adjacent groups of bearings 12, and the two sides of the spacer group are overlapped with the adjacent groups of bearings 12. The spacer group includes a first spacer 5 and a second spacer 6, and the first spacer 5 and the second spacer 6 are arranged from the inside to the outside in the radial direction. The first spacer 5 and the second spacer 6 are overlapped with the side parts of the inner ring and the outer ring of the adjacent group of bearings 12, respectively.

[0040] The inner surface of the second end cover 4 is provided with a groove, and a sealing ring 10 is provided inside the groove. The sealing ring 10 is located between the main shaft 2 and the second end cover 4, so as to achieve the sealing between the main shaft 2 and one end of the bearing box body; the end of the bearing box housing 1 is provided with a second labyrinth seal 9 protruding radially inward, and the second labyrinth seal 9 is provided with a plurality of tooth structures; the main shaft 2 is provided with a first labyrinth seal 8 corresponding to the second labyrinth seal 9, and the first labyrinth seal 8 is provided with a plurality of tooth structures, and is engaged and sealed with the tooth structures on the second labyrinth seal 9 to form a labyrinth seal structure. Among them, the first labyrinth seal 8 rotates with the main shaft 2, and the second labyrinth seal 9 is fixedly installed in the bearing box housing 1. The labyrinth seal structure is filled with grease, which can achieve two-way sealing inside and outside the bearing box, prevent the lubricating oil inside the bearing box from leaking to the outside, and also prevent dust and other impurities in the external environment from entering the bearing box.

[0041] A clamping member 7 is provided inside one end of the bearing housing shell 1, and the clamping member 7 is not connected to the bearing housing shell 1. The clamping member 7 is clamped to the outer ring of the bearing 12 through the top screw inside the threaded hole on the second end cover 4; a clamping bolt 11 is fixedly provided outside one end of the main shaft 2, and the clamping bolt 11 is threadedly connected to the main shaft 2, and one side of the clamping bolt 11 overlaps the inner ring of the bearing 12. The axial limit of the bearing 12 can be achieved through the joint action of the clamping member 7, the clamping bolt 11 and the spacer ring group, and the clamping member 7 is also used to apply an axial preload force to the bearing 12, and the size of the preload force applied by the clamping member 7 can be adjusted by adjusting the top screw.

[0042] In the description of the present application, it should be understood that the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0043] The above describes the specific embodiments of the present invention. It should be understood that the present invention is not limited to the above specific embodiments, and those skilled in the art can make various changes or modifications within the scope of the claims, which does not affect the essence of the present invention. In the absence of conflict, the embodiments of the present application and the features in the embodiments can be combined with each other at will.

Claims

1. A bearing box with a cooling structure housing, characterized in that: It comprises a main shaft (2), a bearing box body and a bearing (12), wherein the bearing (12) is fixedly mounted inside the bearing box body, and the main shaft (2) is arranged on the inner ring of the bearing (12) and is rotatably connected to the bearing box body; The bearing box body comprises a first end cover (3), a second end cover (4) and a bearing box shell (1) arranged between the first end cover (3) and the second end cover (4); the second end cover (4) is provided with an oil nozzle joint (13); and an annular groove is provided in the middle of the bearing box shell (1); The oil nozzle joint (13) is in communication with the annular groove, and external cooling oil flows into the annular groove through the oil nozzle joint (13).

2. The bearing box with cooling structure housing according to claim 1, characterized in that: The second end cover (4) and the bearing box housing (1) are both provided with through holes in a direction parallel to the axial direction, and the first end cover (3) is provided with through holes in a radial direction; One end of the through hole on the second end cover (4) is used to connect with external compressed air, and the other end of the through hole on the second end cover (4) is connected in sequence with the through hole on the bearing box housing (1) and the radial through hole on the first end cover (3) to form a gas flow channel, and the outer end of the radial through hole is provided with a sealing structure, and the inner end of the radial through hole is connected to a circumferential groove provided inside the first end cover (3).

3. The bearing box with cooling structure housing according to claim 2, characterized in that: The main shaft (2) is provided with a groove at a position corresponding to the circumferential groove inside the first end cover (3), and together they form a circumferential sealing gas path; There are multiple gas flow channels in the bearing box body, and the multiple gas flow channels are arranged along the circumferential direction.

4. The bearing box with cooling structure housing according to claim 3, characterized in that: There are multiple circumferential sealing air paths, which are sequentially arranged and connected in sequence along the axial direction.

5. The bearing box with cooling structure housing according to claim 1, characterized in that: At least two groups of bearings (12) are arranged inside the bearing box body, and a spacer ring group is arranged between adjacent groups of bearings (12), and two sides of the spacer ring group are overlapped with adjacent groups of bearings (12) respectively.

6. The bearing box with cooling structure housing according to claim 5, characterized in that: The spacer ring group comprises a first spacer ring (5) and a second spacer ring (6), and the first spacer ring (5) and the second spacer ring (6) are arranged from inside to outside in the radial direction.

7. The bearing box with cooling structure housing according to claim 1, characterized in that: There are a plurality of annular grooves, which are evenly distributed in the bearing box housing (1) along the axial direction and are connected in sequence.

8. The bearing box with cooling structure housing according to claim 1, characterized in that: The inner surface of the second end cover (4) is provided with a groove, a sealing ring (10) is provided inside the groove, and the sealing ring (10) is located between the main shaft (2) and the second end cover (4).

9. The bearing box with cooling structure housing according to claim 1, characterized in that: A second labyrinth seal (9) protruding radially inward is provided at the end of the bearing box housing (1), and a plurality of tooth-like structures are provided on the second labyrinth seal (9); The main shaft (2) is provided with a first labyrinth seal (8) corresponding to the second labyrinth seal (9); the first labyrinth seal (8) is provided with a plurality of tooth-like structures, and engages and seals with the tooth-like structures on the second labyrinth seal (9) to form a labyrinth seal structure.

10. The bearing box with cooling structure housing according to claim 1, characterized in that: A pressing piece (7) is provided inside one end of the bearing box housing (1), the pressing piece (7) is not connected to the bearing box housing (1), and the pressing piece (7) is pressed against the outer ring of the bearing (12) through a top screw inside the threaded hole on the second end cover (4); A clamping bolt (11) is fixedly disposed on the outside of one end of the main shaft (2), the clamping bolt (11) is threadedly connected to the main shaft (2), and one side of the clamping bolt (11) overlaps the inner ring of the bearing (12).

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