Vertical thrust bearing structure

Abstract

The invention provides a vertical thrust bearing structure which comprises a shaft sleeve, a vertical shaft, a first thrust bearing, a second thrust bearing and an adjusting end cover, the vertical shaft, the first thrust bearing, the second thrust bearing and the adjusting end cover are arranged in the shaft sleeve, and the vertical shaft is sequentially connected with the adjusting end cover, the second thrust bearing and the first thrust bearing in a sleeved mode from bottom to top. The second thrust bearing and the first thrust bearing are located on the two sides of the limiting protruding block correspondingly and used for limiting the limiting protruding ring, the first thrust bearing is fixedly connected with the shaft sleeve, the second thrust bearing and the adjusting end cover are both movably connected with the shaft sleeve in a sleeved mode, and the adjusting end cover can drive the second thrust bearing to move axially under the action of external force. Therefore, the axial supporting force of the vertical shaft is adjusted. The invention discloses a vertical thrust bearing structure, which can realize real-time adjustment of axial force of a vertical working rotary machine in the working process of a bearing, and ensures that the bearing is always in an optimal working state, so that the service life of equipment is prolonged.

Description

Technical Field

[0001] The invention belongs to the technical field of thrust bearings, and in particular relates to a vertical thrust bearing structure. Background Art

[0002] Impeller rotating machinery is widely used in many fields. During use, due to the complex and changeable working environment, the performance of bearings as one of the key components of the equipment directly affects the stable operation and service life of the equipment. For vertical rotating machinery, thrust bearings play a key role and directly affect the reliability of the equipment. However, existing thrust bearings generally have the problem of unadjustable axial force and large vibration. Under certain specific working conditions, such as a certain degree of deviation in the design or installation of the vertical shaft, or a gap between the sleeve and the bearing after long-term use, changes in axial force may occur. This will cause uneven pressure on the bearing, thereby accelerating bearing wear and shortening the life of the equipment. At the same time, since the bearing damage cannot be discovered and replaced in time, it will also cause more serious equipment failures. Summary of the invention

[0003] In view of this, the present invention aims to propose a vertical thrust bearing structure to solve the problems of short service life of the thrust bearing and high equipment failure rate.

[0004] To achieve the above object, the technical solution of the present invention is achieved as follows:

[0005] A vertical thrust bearing structure comprises a shaft sleeve and a vertical shaft arranged therein, a first thrust bearing, a second thrust bearing and an adjusting end cover, the vertical shaft is sleeved with the adjusting end cover, the second thrust bearing and the first thrust bearing in sequence from bottom to top, a limiting convex block is provided on the vertical shaft, the second thrust bearing and the first thrust bearing are respectively located on both sides of the limiting convex block, and are used to limit the limiting convex ring, the first thrust bearing is fixedly connected to the shaft sleeve, the second thrust bearing and the adjusting end cover are both movably sleeved with the shaft sleeve, and the adjusting end cover can drive the second thrust bearing to move axially under the action of external force, thereby adjusting the magnitude of the axial supporting force of the vertical shaft.

[0006] Furthermore, a spring is connected between the adjusting end cover and the second thrust bearing.

[0007] Furthermore, the vertical thrust bearing structure includes an adjusting screw, and a screw hole for installing the adjusting screw is provided below the sleeve. After passing through the screw hole, the adjusting screw is threadedly connected to the bottom of the adjusting end cover. Rotating the adjusting screw can drive the adjusting end cover to drive the second thrust bearing to move up and down.

[0008] Furthermore, a side of the first thrust bearing close to the limiting protrusion and a side of the second thrust bearing close to the limiting protrusion are both balls.

[0009] Furthermore, a first oil chamber is formed between the first thrust bearing and the second thrust bearing, and a second oil chamber is formed between the second thrust bearing and the adjusting end cover. Both the first oil chamber and the second oil chamber 1 are used to store lubricating oil.

[0010] Furthermore, a circulation pipeline is provided between the first oil chamber and the second oil chamber, a one-way valve is installed inside the circulation pipeline, and the second thrust bearing is provided with a penetrating oil circuit, which is respectively connected to the first oil chamber and the second oil chamber.

[0011] Furthermore, a cooling pipe is provided outside the circulation pipeline, and the cooling pipe is externally connected to a cold source.

[0012] Compared with the prior art, the vertical thrust bearing structure of the present invention has the following advantages:

[0013] (1) The vertical thrust bearing structure described in the present invention is composed of a first thrust bearing and a second thrust bearing. The second thrust bearing is connected to the adjustment end cover through a spring and can achieve adjustable axial force under the action of the adjustment screw. When the vertical shaft moves, the spring of the second thrust bearing can effectively buffer, reduce noise, and improve the stability and reliability of equipment operation. The automatic circulation lubricating oil system can achieve continuous circulation of lubricating oil in the absence of power, ensure the good lubrication state of the bearing, and extend the service life of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings:

[0015] Figure 1 It is a schematic diagram of the vertical thrust bearing structure described in an embodiment of the present invention.

[0016] Description of reference numerals:

[0017] 1. Bushing; 2. Vertical shaft; 3. Limiting cam; 4. First thrust bearing; 5. Second thrust bearing; 6. Adjusting end cover; 7. Spring; 8. Adjusting screw; 9. First oil chamber; 10. Second oil chamber; 11. Circulating pipeline; 12. One-way valve; 13. Cooling pipe; 14. Oil circuit. DETAILED DESCRIPTION

[0018] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0019] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and the like are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", and the like may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0020] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0021] The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments.

[0022] A vertical thrust bearing structure, such as Figure 1 As shown, it includes a shaft sleeve 1 and a vertical shaft 2, a first thrust bearing 4, a second thrust bearing 5 and an adjusting end cover 6 arranged inside the shaft sleeve. The vertical shaft 2 is sleeved with the adjusting end cover 6, the second thrust bearing 5 and the first thrust bearing 4 in sequence from bottom to top. A limiting protrusion 3 is provided on the vertical shaft 2. The second thrust bearing 5 and the first thrust bearing are respectively located on both sides of the limiting protrusion 3, which are used to limit the limiting protrusion 3. The first thrust bearing 4 is fixedly connected to the shaft sleeve 1, and the second thrust bearing 5 and the adjusting end cover 6 are both movably sleeved with the shaft sleeve 1. The adjusting end cover 6 can drive the second thrust bearing 5 to move axially under the action of external force, thereby adjusting the size of the axial supporting force of the vertical shaft 2.

[0023] In one or more embodiments, a spring 7 is connected between the adjusting end cover 6 and the second thrust bearing 5 , and the arrangement of the spring 7 can provide a good buffering effect.

[0024] A vertical thrust bearing structure also includes an adjusting screw 8. A screw hole for installing the adjusting screw 8 is provided below the sleeve 1. The adjusting screw 8 passes through the screw hole and is threadedly connected to the bottom of the adjusting end cover 6. The adjusting screw 8 is rotated to drive the adjusting end cover 6 to drive the second thrust bearing 5 to move up and down, and the axial supporting force of the second thrust bearing 5 on the vertical shaft 2 can be adjusted, so that the vertical shaft 2 will move axially when it is subjected to load changes or external forces during operation.

[0025] In one or more embodiments, the side of the first thrust bearing 4 close to the limiting protrusion 3 and the side of the second thrust bearing 5 close to the limiting protrusion 3 are both balls, which are used to reduce the friction between them and the limiting protrusion 3.

[0026] In one or more embodiments, a first oil chamber 9 is formed between the first thrust bearing 4 and the second thrust bearing 5, and a second oil chamber 10 is formed between the second thrust bearing 5 and the adjusting end cover 6. Both the first oil chamber 9 and the second oil chamber 10 are used to place lubricating oil to play a lubricating role.

[0027] Furthermore, a circulation pipeline 11 is provided between the first oil chamber 9 and the second oil chamber 10, and a one-way valve 12 is provided in the circulation pipeline 11. An oil passage 14 is provided through the second thrust bearing 5. Under the action of external force, the vertical shaft 2 will undergo intermittent axial movement. When the vertical shaft 2 moves toward the direction of the second thrust bearing 5, the lubricating oil in the second oil chamber 10 will be squeezed, so that the lubricating oil in the second oil chamber 10 flows into the first oil chamber 9. When the vertical shaft 2 moves in the reverse direction, under the action of the spring 7, the second thrust bearing 5 is reset, so that the lubricating oil in the first oil chamber 9 automatically flows into the second oil chamber 10. In this way, the lubricating oil circulates between the first oil chamber 9 and the second oil chamber 10 without the action of power, which has a good lubrication effect.

[0028] A cooling pipe 13 is provided outside the circulation pipeline 11 . When the lubricating oil flows into the circulation pipeline 11 , part of its heat is exchanged to the cooling pipe 13 . The cooling pipe 13 can be connected to an external cold source, thereby achieving heat dissipation and cooling of the interior of the sleeve 1 .

[0029] The vertical thrust bearing structure of this scheme is composed of a first thrust bearing and a second thrust bearing. The second thrust bearing is connected to the adjustment end cover through a spring and can adjust the axial force under the action of the adjustment screw. When the vertical axis moves, the spring of the second thrust bearing can effectively buffer, reduce noise, and improve the stability and reliability of equipment operation. The automatic circulation lubricating oil system can realize the continuous circulation of lubricating oil in the absence of power, ensure the good lubrication state of the bearing, and extend the service life of the equipment.

[0030] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A vertical thrust bearing structure, characterized in that: It includes a shaft sleeve and a vertical shaft arranged inside it, a first thrust bearing, a second thrust bearing and an adjusting end cover. The vertical shaft is sleeved with the adjusting end cover, the second thrust bearing and the first thrust bearing in sequence from bottom to top. A limiting convex block is provided on the vertical shaft. The second thrust bearing and the first thrust bearing are respectively located on both sides of the limiting convex block and are used to limit the limiting convex ring. The first thrust bearing is fixedly connected to the shaft sleeve. The second thrust bearing and the adjusting end cover are movably sleeved with the shaft sleeve. The adjusting end cover can drive the second thrust bearing to move axially under the action of external force, thereby adjusting the size of the axial supporting force of the vertical shaft.

2. A vertical thrust bearing structure according to claim 1, characterized in that: A spring is connected between the adjusting end cover and the second thrust bearing.

3. A vertical thrust bearing structure according to claim 1, characterized in that: It includes an adjusting screw, a screw hole for installing the adjusting screw is provided below the shaft sleeve, the adjusting screw passes through the screw hole and is threadedly connected with the bottom of the adjusting end cover, and rotating the adjusting screw can drive the adjusting end cover to drive the second thrust bearing to move up and down.

4. A vertical thrust bearing structure according to claim 1, characterized in that: The side of the first thrust bearing close to the limiting protrusion and the side of the second thrust bearing close to the limiting protrusion are both balls.

5. The vertical thrust bearing structure according to claim 1, characterized in that: A first oil chamber is formed between the first thrust bearing and the second thrust bearing, and a second oil chamber is formed between the second thrust bearing and the adjusting end cover. Both the first oil chamber and the second oil chamber 1 are used to store lubricating oil.

6. A vertical thrust bearing structure according to claim 5, characterized in that: A circulation pipeline is provided between the first oil chamber and the second oil chamber, a one-way valve is installed inside the circulation pipeline, and the second thrust bearing is provided with a penetrating oil path, which is respectively connected to the first oil chamber and the second oil chamber.

7. A vertical thrust bearing structure according to claim 6, characterized in that: A cooling pipe is arranged outside the circulation pipeline, and the cooling pipe is externally connected to a cold source.

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