Bearing and bearing bush lubricating structure of centrifugal pump bearing body

Abstract

The utility model discloses a bearing and bearing bush lubricating structure of a centrifugal pump bearing body, which comprises a main shell and a pump shaft assembled in the main shell, and a bearing bush and a bearing are sleeved on the pump shaft. An oil pumping device fixedly connected to the pump shaft in a sleeving mode is arranged on one side of the bearing, an inner cavity of the main shell is divided into a main cavity and an oil pumping cavity through the oil pumping device, and an oil sinking area is arranged at the bottom of the main cavity; oil guide impellers are evenly distributed on the oil pumping device, and an oil suction channel with the upper end communicated with the oil pumping cavity and the lower end communicated with the oil sinking area is arranged at the lower end of the main shell. The upper end of the main shell is provided with a snakelike lubricating oil cooling oil channel, the lubricating oil cooling oil channel is communicated with the oil pumping cavity through an oil guide channel, and the lubricating oil cooling oil channel is provided with a plurality of oil spraying channels corresponding to the bearing bushes and the bearings respectively.

Description

Technical Field

[0001] The utility model relates to the field of centrifugal pumps, in particular to a bearing and a bearing bush lubrication structure of a bearing body of a centrifugal pump. Background Art

[0002] In the existing self-lubricating bearing body of a centrifugal pump, generally, an oil slinger is used to stir and sling oil to lubricate the bearing bush and the rolling bearing body. The lubricating oil stirred up is the high-temperature oil on the surface of the oil sump (as shown in Figure 1 ), which easily causes the bearing temperature to be high, the lubricating oil to deteriorate quickly, and shortens the entire service life cycle. In view of this problem, the applicant considered designing a structure to cool the lubricating oil in the pump body and guide the cooled lubricating oil to the bearing body and the bearing bush for lubrication.

[0003] Chinese Patent No. 201210099304.9 discloses a bearing and a lubricating device for the bearing, including an outer ring, an inner ring and rolling elements between the inner and outer rings. The bearing is provided with an oil pumping device on at least one side. A spiral groove is arranged on the outer side of the inner ring, and the rolling element is a cylinder. The lubricating device of the bearing includes a shaft, a bearing and a bearing housing. The bearing is provided with an impeller on at least one side. The bearing housing is provided with an oil inlet hole and an oil outlet hole which are respectively connected with oil pipes. One end of the oil inlet pipe is connected with a cooling device, and one end of the oil outlet pipe is connected with a magnetic filter. The cooling device is communicated with the magnetic filter. In this way, not only can the bearing lubricating oil be continuously provided through the oil pumping device, but also the temperature of the lubricating oil can be controlled within a certain range through the cooling device. After being filtered by the magnetic filter and cooled by the serpentine pipe in the water tank, the lubricating oil returns to the bearing housing, effectively reducing the high temperature caused by the high-speed rotation of the bearing, reducing the bearing friction and prolonging the service life of the bearing. The overall structure of the above bearing lubricating device is relatively complex, and the cooling of the lubricating oil requires a cooling device, which is not applicable to centrifugal pumps. Summary of the Invention

[0004] Aiming at the above deficiencies existing in the prior art, the purpose of the utility model is to provide a bearing and a bearing bush lubrication structure of a bearing body of a centrifugal pump, which solves the problems that the existing bearing lubrication structure is complex, and a cooling device is required for cooling, which will occupy a large space and is not applicable to the lubrication and cooling of the bearing and the bearing bush in a centrifugal pump.

[0005] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0006] A bearing and journal bearing lubrication structure for a centrifugal pump bearing body, comprising a main housing and a pump shaft assembled in the main housing. A journal bearing and a bearing are sleeved on the pump shaft. On one side of the bearing, there is an oil pumping device sleeved and fixed on the pump shaft. The oil pumping device divides the inner cavity of the main housing into a main chamber and an oil pumping chamber. The bottom of the main chamber has an oil sump area. Oil guiding impellers are evenly distributed on the oil pumping device. At the lower end of the main housing, there is an oil suction channel with the upper end communicating with the oil pumping chamber and the lower end communicating with the oil sump area. At the upper end of the main housing, there is a serpentine lubricating oil cooling channel, which is connected to the oil pumping chamber through an oil guiding channel. And a plurality of spray channels corresponding to the journal bearing and the bearing respectively are arranged on the lubricating oil cooling channel. In this way, after the pump shaft rotates, it drives the oil pumping device sleeved on it to rotate together. During the rotation process, a negative pressure is formed between the space formed by the oil pumping chamber corresponding to the oil pumping device and the oil suction channel and the oil sump area, sucking the lubricating oil in the oil sump area into the oil pumping chamber through the oil suction channel, and finally entering the lubricating oil cooling channel through the oil guiding channel and spraying out through the spray channels to lubricate the bearing and the journal bearing corresponding to the spray channels. The sucked lubricating oil is in the oil sump area, and the oil sump area is at the bottom position of the lower end of the main housing. The lubricating oil at this place is normal temperature oil, which can ensure that the temperature of the lubricating oil sucked and entering the upper end of the main housing will not be too high. At the same time, after the lubricating oil reaches the oil pumping chamber, it is agitated by the oil guiding impellers and then sent to the lubricating oil cooling channel, and then sprayed to the bearing and the journal bearing. The arranged lubricating oil cooling channel is serpentine, which can effectively increase the passing path of the lubricating oil and can effectively further cool the passing lubricating oil, making the sprayed lubricating oil at a low temperature and not damaging the service life of the bearing and the journal bearing. The arranged oil pumping device is placed in the main housing, with a compact overall structure, which can be widely promoted and is applicable to a variety of models.

[0007] Further, the main housing is composed of an upper housing, a lower housing and a tail cover. The tail cover is placed on one side of the upper housing and the lower housing, with the upper end fixedly connected to the side end of the upper housing and the lower end fixedly connected to the lower housing. Heat dissipation fins are arranged on the outer sides of both the upper housing and the lower housing. In this way, the lubricating oil cooling channel corresponds to the upper housing, and the oil sump area corresponds to the lower housing. Thus, after heat dissipation fins are arranged on the outer sides of the upper housing and the lower housing, the upper housing and the lower housing can be cooled by external cold air, thereby cooling the lubricating oil in the oil sump area and the lubricating oil cooling channel.

[0008] Further, the oil sump area is within the space enclosed by the lower housing and the tail cover, inclined downward on the side away from the oil pumping device, and an oil outlet hole is arranged at the bottom end of the inclined side of the lower housing and the oil sump area. In this way, after one side of the oil sump area is inclined downward, it is conical inside, which can effectively ensure that the lubricating oil at this place is fully precipitated, ensuring that the lubricating oil sucked into the oil pumping chamber is clean.

[0009] Further, a lower oil guiding hole is provided at the upper end of the tail cover, and an upper oil guiding hole communicating with the lower oil guiding hole is provided at one end where the upper housing is connected to the tail cover. The upper oil guiding hole and the lower oil guiding hole form the oil guiding channel; the oil guiding channel is inclined. In this way, the oil guiding channel is composed of the upper oil guiding hole provided in the upper housing and the lower oil guiding hole provided in the tail cover, and is inclined. The passing path is a straight line segment without turning, and can quickly enter the lubricating oil cooling channel. Brief Description of the Drawings

[0010] Figure 1 is a schematic cross-sectional structure diagram of a centrifugal pump bearing body in the prior art;

[0011] Figure 2 is a schematic cross-sectional structure diagram of a centrifugal pump bearing body in the embodiment;

[0012] Figure 3 is a schematic diagram of the lubricating oil cooling oil channel in the embodiment. Detailed Embodiments

[0013] In order to make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. Usually, the components of the embodiments of the present invention described and illustrated herein can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts fall within the scope of protection of the present invention.

[0014] It should be noted that like reference numerals and letters denote like items in the following figures, and thus, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures. In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the figures, or the orientation or positional relationship in which the inventive product is usually placed during use. It is only for the convenience of describing the present utility model 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 thus should not be construed as a limitation of the present utility model. In addition, the terms "first", "second", "third", etc. are only used for distinguishing descriptions and cannot be construed as indicating or implying relative importance. In addition, terms such as "horizontal" and "vertical" do not mean that the components are required to be absolutely horizontal or hanging vertically, but can be slightly inclined. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined. In the description of the present utility model, it should also be noted that unless otherwise clearly specified and defined, the terms "set", "installed", "connected", "connected to" 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 directly connected or indirectly connected through an intermediate medium, and can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0015] Such as Figure 2 , Figure 3As shown in the figure, the bearing and bearing bush lubrication structure of the centrifugal pump shaft bearing body provided in this embodiment includes a main housing 1 and a pump shaft 2 assembled in the main housing 1. A bearing bush 4 and a bearing 3 are sleeved on the pump shaft 2. On one side of the bearing 3, there is an oil pumping device 5 sleeved and fixed on the pump shaft 2. The oil pumping device 5 divides the inner cavity of the main housing 1 into a main chamber and an oil pumping chamber 16 (the oil pumping device 5 is assembled on the pump shaft 2 by interference fit, and after the inner end is bent outward, it is adjacent to the inner side of the main housing 1 and has a rotational clearance with the inner side wall of the main housing 1). The main chamber includes an oil injection area, an oil return area, and an oil sump area 15 arranged from top to bottom. Oil guiding impellers 51 are evenly distributed outside the oil pumping device 5. At the lower end of the main housing 1, there is an oil suction channel 17 with the upper end communicating with the oil pumping chamber 16 and the lower end communicating with the oil sump area 15. At the upper end of the main housing 1, there is a serpentine lubricating oil cooling oil channel 19. The lubricating oil cooling oil channel 19 is communicated with the oil pumping chamber 16 through an oil guiding channel 18, and there are a plurality of oil injection channels 19a corresponding to the bearing bush 4 and the bearing 3 respectively on the lubricating oil cooling oil channel 19. When the oil pumping device 5 rotates with the pump shaft 2, a negative pressure is formed between the oil pumping chamber 16 and the oil sump area 15, which can suck the normal temperature lubricating oil in the oil sump area 15 into the oil pumping chamber 16. Then, the lubricating oil is agitated by the impeller on the oil pumping device 5 and introduced into the oil guiding channel 18. In this way, after the pump shaft 2 rotates, it drives the oil pumping device 5 sleeved on it to rotate together. During the rotation process, a negative pressure is formed between the space formed by the oil pumping chamber 16 corresponding to the oil pumping device 5 and the oil suction channel 17 and the oil sump area 15, sucking the lubricating oil in the oil sump area 15 into the oil pumping chamber 16 through the oil suction channel 17. Finally, it enters the lubricating oil cooling oil channel 19 through the oil guiding channel 18 and is sprayed out by the oil injection channel 19a to lubricate the bearing 3 and the bearing bush 4 corresponding to the oil injection channel 19a. The sucked lubricating oil is in the oil sump area 15, and the oil sump area 15 is at the bottom position of the lower end of the main housing 1. The lubricating oil at this place is normal temperature oil, which can ensure that the oil temperature of the lubricating oil sucked into the upper end of the main housing 1 is not too high. At the same time, after the lubricating oil reaches the oil pumping chamber 16, it is agitated by the oil guiding impellers 51 and then guided to the lubricating oil cooling oil channel 19 and then sprayed onto the bearing 3 and the bearing bush 4. The arranged lubricating oil cooling oil channel 19 is serpentine, which can effectively increase the passing path of the lubricating oil and can effectively further cool the passing lubricating oil, making the sprayed lubricating oil have a low temperature and not causing damage to the service life of the bearing 3 and the bearing bush 4. The arranged oil pumping device 5 is placed in the main housing 1, with a compact overall structure, which can be widely promoted and is applicable to a variety of models.

[0016] Furthermore, the main housing 1 is composed of an upper housing 11, a lower housing 12, and a tail cover 13. The tail cover 13 is placed on one side of the upper housing 11 and the lower housing 12, with its upper end fixedly connected to the side end of the upper housing 11 and its lower end fixedly connected to the lower housing 12. Heat sinks 14 are provided on the outer sides of both the upper housing 11 and the lower housing 12. In this way, the lubricating oil cooling channel corresponds to the upper housing 11, and the oil sump area 15 corresponds to the lower housing 12. Thus, after heat sinks 14 are provided on the outer sides of the upper housing 11 and the lower housing 12, the upper housing 11 and the lower housing 12 can be cooled by external cold air, thereby cooling the lubricating oil in the oil sump area 15 and the lubricating oil cooling channel.

[0017] Furthermore, the oil sump area 15 is within the space enclosed by the lower housing 12 and the tail cover 13, and slopes downward away from the oil pumping device 5. An oil outlet hole is provided at the lower end of the lower housing 12 and at the bottom end of the inclined side of the oil sump area 15. In this way, after one side of the oil sump area 15 slopes downward, it is conical inside, which can effectively ensure that the lubricating oil there is fully precipitated, ensuring that the lubricating oil sucked into the oil pumping chamber 16 is clean.

[0018] Furthermore, a lower oil guiding hole is provided at the upper end of the tail cover 13, and an upper oil guiding hole communicating with the lower oil guiding hole is provided at the end where the upper housing 11 is connected to the tail cover 13. The upper oil guiding hole and the lower oil guiding hole form the oil guiding channel 18; the oil guiding channel 18 is inclined. In this way, the oil guiding channel 18 is composed of the upper oil guiding hole provided in the upper housing 11 and the lower oil guiding hole provided in the tail cover 13, is inclined, and the passing path is a straight line segment without turning, enabling it to quickly enter the lubricating oil cooling channel.

[0019] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit them. Those of ordinary skill in the art should understand that any modifications or equivalent replacements made to the technical solutions of the present invention without departing from the spirit and scope of the present technical solutions should be covered within the scope of the claims of the present invention.

Claims

1. A bearing and bearing bush lubrication structure for a centrifugal pump bearing body, comprising a main housing and a pump shaft assembled in the main housing, with a bearing bush and a bearing sleeved on the pump shaft; characterized in that, On one side of the bearing, there is an oil pumping device sleeved and fixed on the pump shaft. The oil pumping device divides the inner cavity of the main housing into a main chamber and an oil pumping chamber. The bottom of the main chamber has an oil sump area. Guide oil impellers are evenly distributed on the oil pumping device. At the lower end of the main housing, there is an oil suction channel with its upper end communicating with the oil pumping chamber and its lower end communicating with the oil sump area. At the upper end of the main housing, there is a serpentine lubricating oil cooling channel, which is connected to the oil pumping chamber through a guide oil channel. And there are multiple injection channels corresponding to the bearing bush and the bearing respectively on the lubricating oil cooling channel.

2. The bearing and bearing bush lubrication structure of the centrifugal pump bearing body according to claim 1, characterized in that, The main housing is composed of an upper housing, a lower housing and a tail cover. The tail cover is placed on one side of the upper housing and the lower housing, with its upper end fixedly connected to the side end of the upper housing and its lower end fixedly connected to the lower housing. Heat dissipation fins are provided on the outer sides of both the upper housing and the lower housing.

3. The bearing and bearing bush lubrication structure of the centrifugal pump bearing body according to claim 2, characterized in that, The oil sump area is within the space enclosed by the lower housing and the tail cover, inclined downward on the side away from the oil pumping device. An oil outlet hole is provided at the lower end of the lower housing, at the bottom of the inclined side of the oil sump area.

4. The bearing and bearing bush lubrication structure of the centrifugal pump bearing body according to claim 2 or 3, characterized in that, A lower oil guide hole is provided at the upper end of the tail cover, and an upper oil guide hole communicating with the lower oil guide hole is provided at the end where the upper housing is connected to the tail cover. The upper oil guide hole and the lower oil guide hole form the guide oil channel. The guide oil channel is inclined.

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