Underwater bearing lubricating and sealing device for pump and water pump

Abstract

The utility model provides an underwater bearing lubricating and sealing device for a pump and a water pump, which relate to the technical field of water pumps and comprise a pump shaft, a bearing, a support, a first sealing assembly and a second sealing assembly. Wherein the bearing is arranged at the position close to the tail end of the pump shaft; the support surrounds the peripheries of the bearing and the pump shaft; the first sealing assembly is assembled on the periphery of the pump shaft and located on the side, close to the interior of the pump body, of the bearing. The first sealing assembly comprises a first mechanical sealing structure, a lubricating oil chamber is arranged on the periphery of the first mechanical sealing structure, and an oil inlet channel and an oil outlet channel which are communicated with the lubricating oil chamber are arranged. The second sealing assembly comprises a sealing end cover located on the side, close to the outside of the pump body, of the bearing. The sealing end cover covers the end portion of the tail end of the pump shaft and the end portion of the bearing, a lubricating grease chamber is formed in the sealing end cover, and a lubricating grease inlet channel and a lubricating grease outlet channel which are communicated with the lubricating grease chamber are arranged. Water in the environment can be separated from the bearing through the first sealing assembly and the second sealing assembly.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of water pumps, in particular to a pump underwater bearing lubrication and sealing device and water pump. BACKGROUND

[0002] A pump is a machine for conveying fluid or pressurizing fluid. The pump shaft of a water pump needs to be installed with a bearing to obtain rotary support. Some types of water pumps need to be immersed in water during operation. The water in the environment can affect the operation of the bearing. Therefore, the bearing on the pump shaft needs to be sealed and protected to isolate the water in the environment. At present, the sealing structure of some water pumps cannot reliably seal and protect the bearing when working underwater for a long time, causing water in the environment to enter the bearing on the pump shaft, damaging the bearing on the pump shaft, and the water pump cannot work normally. CONTENT OF THE UTILITY MODEL

[0003] The technical problem to be solved by the present application is to provide a pump underwater bearing lubrication and sealing device and water pump to solve the above problems in the prior art.

[0004] A pump underwater bearing lubrication and sealing device, comprising:

[0005] A pump shaft is arranged in the pump body;

[0006] A bearing is arranged at a position close to the end of the pump shaft to rotatably support the pump shaft;

[0007] A support surrounds the outer periphery of the bearing and the pump shaft;

[0008] A first sealing assembly is arranged on the outer periphery of the pump shaft and located on the side of the bearing close to the inside of the pump body; the first sealing assembly comprises a first mechanical sealing structure, and a lubricating oil chamber is arranged around the first mechanical sealing structure, and an oil inlet channel and an oil outlet channel in communication with the lubricating oil chamber are arranged;

[0009] A second sealing assembly comprises a sealing end cover located on the side of the bearing close to the outside of the pump body; the sealing end cover covers the end of the pump shaft and the end of the bearing, forms a lubricating grease chamber in the inside, and is provided with a lubricating grease inlet channel and a lubricating grease outlet channel in communication with the lubricating grease chamber.

[0010] Optionally, the first sealing assembly further comprises a second mechanical sealing structure; the second mechanical sealing structure is arranged on the side of the first mechanical sealing structure away from the bearing.

[0011] Optionally, the pump shaft is provided with a first shaft sleeve and a second shaft sleeve, wherein the first shaft sleeve is located close to the bearing; the first sealing assembly is arranged on the first shaft sleeve, and the second sealing assembly is arranged on the second shaft sleeve.

[0012] Optionally, the support comprises an outer support and a sealing bush arranged in the inner ring of the outer support, and the first mechanical sealing structure and the bearing are arranged in the inner ring of the sealing bush.

[0013] Optionally, the sealing end cover, the sealing bush and the outer support are connected together by bolts; a sealing ring is arranged between the sealing end cover and the sealing bush; and a sealing ring is arranged between the sealing bush and the outer support.

[0014] Optionally, a nut is further arranged at the end of the pump shaft; the nut is assembled on the pump shaft by thread cooperation, and the bearing is limited on the pump shaft between the nut and the first shaft sleeve.

[0015] Optionally, an oil seal structure is further arranged between the first mechanical sealing structure and the bearing.

[0016] Optionally, the oil inlet channel comprises an oil inlet hole on the support and communicating with the lubricating oil chamber, and an external oil inlet pipeline connected with the oil inlet hole;

[0017] The oil discharge channel comprises an oil discharge hole on the support and communicating with the lubricating oil chamber, and an external oil discharge pipeline connected with the oil discharge hole.

[0018] Optionally, the grease inlet channel comprises a grease inlet hole on the sealing end cover and communicating with the grease chamber, and an external grease inlet pipeline connected with the grease inlet hole;

[0019] The grease discharge channel comprises a grease discharge hole on the sealing end cover and communicating with the grease chamber, and an external grease discharge pipeline connected with the grease discharge hole.

[0020] In another aspect, the application further provides a water pump with the above-mentioned any one of the underwater bearing lubrication and sealing devices for pumps.

[0021] In the application, the first sealing assembly and the second sealing assembly are respectively arranged on both sides of the bearing; wherein the first sealing assembly is assembled on the outer periphery of the pump shaft and located on the side of the bearing close to the inside of the pump body, the first sealing assembly comprises a first mechanical sealing structure, a lubricating oil chamber is arranged around the first mechanical sealing structure, and an oil inlet channel and an oil outlet channel in communication with the lubricating oil chamber are arranged. And the second sealing assembly comprises a sealing end cover, which is located on the side of the bearing close to the outside of the pump body; the sealing end cover covers the end of the end of the pump shaft and the end of the bearing, forms a lubricating grease chamber in the inside, and is provided with a lubricating grease inlet channel and a lubricating grease outlet channel in communication with the lubricating grease chamber. Based on the above structure, on the one hand, the first sealing assembly can isolate the water in the environment from the bearing with the help of the lubricating oil in the lubricating oil chamber, and the second sealing assembly can isolate the water in the environment from the bearing with the help of the lubricating grease in the lubricating grease chamber, and the first sealing assembly and the second sealing assembly can isolate the water in the environment from the bearing. On the other hand, the lubricating oil enters the lubricating oil chamber from the oil inlet channel and is discharged from the oil outlet channel; the lubricating grease enters the lubricating grease chamber from the lubricating grease inlet channel and is discharged from the lubricating grease outlet channel. Whether the first sealing assembly and the second sealing assembly leak can be judged by observing whether the lubricating grease and the lubricating oil discharged from the oil outlet channel and the lubricating grease outlet channel contain water, so that the damage and leakage of the sealing structure can be found in time and repaired in time. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 is a structural schematic view of the lubricating and sealing device for the underwater bearing of the pump in the embodiment of the application.

[0023] Figure 2 is Figure 1 a partial enlarged view of

[0024] Fig. 1 is a structural schematic view of the lubricating and sealing device for the underwater bearing of the pump in the embodiment of the application. DETAILED DESCRIPTION

[0025] The following is a specific embodiment of the application and further describes the technical solution of the application in conjunction with the drawings, but the application is not limited to these embodiments. In the following description, specific details such as specific configurations and components are provided only to help fully understand the embodiments of the application. Therefore, those skilled in the art should understand that various changes and modifications can be made to the embodiments described herein without departing from the scope of protection of the application. In addition, in order to be clear and concise, the description of known functions and structures is omitted.

[0026] It should be noted that the embodiments and features in the present application can be combined with each other in the case of no conflict.

[0027] The present application provides a pump underwater bearing lubrication and sealing device, which is applied to a water pump. When the water pump works underwater, the pump underwater bearing lubrication and sealing device can provide stable and reliable bearing sealing, so that the bearing can work normally underwater. The pump underwater bearing lubrication and sealing device provided by the present application will be described in detail below with reference to the accompanying drawings.

[0028] Reference Figure 1 and Figure 2 The pump underwater bearing lubrication and sealing device comprises a pump shaft 10, a bearing 20, a support 30, a first sealing assembly 40 and a second sealing assembly 50. The pump shaft 10 is arranged in the pump body; the bearing 20 is arranged at the position close to the end of the pump shaft 10, and is used to rotate and support the pump shaft 10; and the support 30 surrounds the outer periphery of the bearing 20 and the pump shaft 10.

[0029] The support 30 is a part of the pump body, and is a fixed structure on the pump body, which is used as the mounting base of the bearing 20. In the structure shown in Figure 1 and Figure 2 , the support 30 is designed as an independent component, which is connected with other structures of the pump body. The pump shaft 10 is mounted on the support 30 through the bearing 20, and the bearing 20 can allow the pump shaft 10 to rotate and support the pump shaft 10.

[0030] The first sealing assembly 40 and the second sealing assembly 50 are arranged on the two sides of the bearing 20 respectively, which are used to seal and protect the two sides of the bearing, so as to prevent water in the environment from entering the bearing. The first sealing assembly 40 is located on the side of the bearing 20 close to the inside of the pump body, and the second sealing assembly 50 is located on the side of the bearing 20 close to the outside of the pump body. In the structure shown in Figure 1 and Figure 2 , the first sealing assembly 40 is located on the upper side of the bearing 20, and the second sealing assembly 50 is located on the lower side of the bearing 20.

[0031] The first sealing assembly 40 is assembled on the outer periphery of the pump shaft 10 and is located on the side of the bearing 20 close to the inside of the pump body. The first sealing assembly 40 comprises a first mechanical sealing structure 41, and a lubricating oil chamber 43 is arranged around the first mechanical sealing structure 41, and an oil inlet passage and an oil outlet passage in communication with the lubricating oil chamber 43 are arranged. Lubricating oil is injected into the oil inlet passage from an external oil supply source, and the lubricating oil is injected into the lubricating oil chamber 43 through the oil inlet passage. After the lubricating oil chamber 43 is filled with lubricating oil, the lubricating oil is discharged through the oil outlet passage. When the water pump is working, the lubricating oil is continuously injected into the lubricating oil chamber 43 through the oil inlet passage, and the lubricating oil is continuously discharged from the oil outlet passage. At this time, when the first mechanical sealing structure 41 leaks, water in the environment enters the lubricating oil chamber 43. Since the water entering the lubricating oil chamber 43 will be partially discharged through the oil outlet passage, whether the first sealing assembly 40 leaks can be determined by observing whether water is discharged from the oil outlet passage.

[0032] In an embodiment of the present application, the oil inlet passage comprises an oil inlet hole 44 and an external oil inlet pipeline, wherein the oil inlet hole 44 is located on the support 30 and is in communication with the lubricating oil chamber 43, and the external oil inlet pipeline is connected with the oil inlet hole 44. The oil outlet passage comprises an oil outlet hole 45 and an external oil outlet pipeline, wherein the oil outlet hole 45 is located on the support 30 and is in communication with the lubricating oil chamber 43, and the external oil outlet pipeline is connected with the oil outlet hole 45. During the oil inlet process, the lubricating oil output by the external oil supply source first enters the external oil inlet pipeline, and then enters the oil inlet hole 44 in communication with the external oil inlet pipeline, and then enters the lubricating oil chamber 43 inside the support 30 through the oil inlet hole 44. During the lubricating oil discharge process, the lubricating oil in the lubricating oil chamber 43 first enters the oil outlet hole 45, is output to the outside of the support 30 from the oil outlet hole 45, and then enters the external oil outlet pipeline, so as to realize the backflow of the lubricating oil.

[0033] The second sealing assembly 50 comprises a sealing end cover 51, which is located on the side of the bearing 20 close to the outside of the pump body. The sealing end cover 51 covers the end of the pump shaft 10 and the end of the bearing 20, and forms a lubricating grease chamber 52 inside, and is provided with a lubricating grease inlet passage and a lubricating grease outlet passage in communication with the lubricating grease chamber 52. Lubricating grease is injected into the lubricating grease inlet passage from an external lubricating grease supply source, and the lubricating grease is injected into the lubricating grease chamber 52 through the lubricating grease inlet passage. After the lubricating grease chamber 52 is filled with lubricating grease, the lubricating grease is discharged through the lubricating grease outlet passage. When the water pump is working, the lubricating grease is continuously injected into the lubricating grease chamber 52 through the lubricating grease inlet passage, and the lubricating grease is continuously discharged from the lubricating grease outlet passage. At this time, when the second sealing assembly 50 leaks, water in the environment enters the lubricating grease chamber 52. Since the water entering the lubricating grease chamber 52 will be partially discharged through the lubricating grease outlet passage, whether the second sealing assembly 50 leaks can be determined by observing whether water is discharged from the lubricating grease outlet passage.

[0034] In an embodiment of the present application, the lubricating grease inlet channel comprises a grease inlet hole 53 and an external lubricating grease inlet pipeline, wherein the grease inlet hole 53 is located on the sealing end cover 51 and communicates with the lubricating grease chamber 52, and the external lubricating grease inlet pipeline is connected with the grease inlet hole 53; the lubricating grease outlet channel comprises a grease outlet hole 54 and an external lubricating grease outlet pipeline, wherein the grease outlet hole 54 is located on the sealing end cover 51 and communicates with the lubricating grease chamber 52, and the external lubricating grease outlet pipeline is connected with the grease outlet hole 54. During the input of the lubricating grease, the lubricating grease is first input into the external lubricating grease inlet pipeline, and then enters the grease inlet hole 53 connected therewith from the external lubricating grease inlet pipeline, and enters the lubricating grease chamber 52 in the sealing end cover 51 through the grease inlet hole 53. During the output of the lubricating grease, the lubricating grease in the lubricating grease chamber 52 first enters the grease inlet hole 53, and then enters the external lubricating grease outlet pipeline from the grease inlet hole 53, so as to realize the backflow of the lubricating grease.

[0035] In an embodiment of the present application, the first sealing assembly 40 further comprises a second mechanical sealing structure 42; the second mechanical sealing structure 42 is arranged on the side of the first mechanical sealing structure 41 away from the bearing 20. In this structure, the first sealing assembly 40 comprises the first mechanical sealing structure 41 and the second mechanical sealing structure 42, the first mechanical sealing structure 41 is used for preliminary sealing and can block impurities in the environment to prevent the impurities in the environment from entering, and the second mechanical sealing structure 42 is used for providing further sealing. In this design, reliable sealing can be realized by means of the first mechanical sealing structure 41 and the second mechanical sealing structure 42, so that the bearing can work underwater for a long time.

[0036] Further, the pump shaft 10 is provided with a first shaft sleeve 60 and a second shaft sleeve 70, wherein the first shaft sleeve 60 is located on the side close to the bearing 20; the first sealing assembly 40 is arranged on the first shaft sleeve 60, and the second sealing assembly 50 is arranged on the second shaft sleeve 70. Referring to Figure 1 and Figure 2 , the first shaft sleeve 60 and the second shaft sleeve 70 are defined at the position above the bearing 20. Further, a nut 80 is further provided at the end of the pump shaft 10; the nut 80 is assembled on the pump shaft 10 through threaded cooperation, and the bearing 20 is defined on the pump shaft 10 between the nut 80 and the first shaft sleeve 60.

[0037] In an embodiment of the present application, the support 30 comprises an outer support 31 and a sealing bush 32, the sealing bush 32 is arranged in the inner circle of the outer support 31, and the first mechanical sealing structure 41 and the bearing 20 are both arranged in the inner circle of the sealing bush 32. In this structure, the sealing bush 32 serves as a mounting seat for the first mechanical sealing structure 41 and the bearing 20, and the outer support 31 serves as a fixing structure.

[0038] In an embodiment of the present application, the sealing end cover 51, the sealing bush 32 and the outer support 31 are connected together by bolts; a sealing ring is arranged between the sealing end cover 51 and the sealing bush 32; and a sealing ring is arranged between the sealing bush 32 and the outer support 31. In this structure, the sealing ring between the sealing end cover 51 and the sealing bush 32 is used to realize fixed sealing to prevent leakage between the sealing end cover 51 and the sealing bush 32. The sealing ring between the sealing bush 32 and the outer support 31 is used to realize fixed sealing to prevent leakage between the sealing bush 32 and the outer support 31.

[0039] In an embodiment of the present application, an oil seal structure 90 is further arranged between the first mechanical seal structure 41 and the bearing 20. The oil seal structure 90 is used to isolate the lubricating oil and grease on both sides to prevent the lubricating oil and grease from passing through.

[0040] The present application also provides a water pump having the underwater bearing lubrication and sealing device for pump provided in the foregoing part of the present application. When the water pump works underwater, the underwater bearing lubrication and sealing device for pump can provide stable and reliable bearing sealing, so that the bearing can work normally underwater.

[0041] In the underwater bearing lubrication and sealing device for pump provided in the present application, the first sealing assembly and the second sealing assembly are arranged on both sides of the bearing, wherein the first sealing assembly is assembled to the outer periphery of the pump shaft and located on the side of the bearing close to the inside of the pump body, the first sealing assembly comprises the first mechanical seal structure, an oil chamber is arranged around the first mechanical seal structure, and an oil inlet passage and an oil outlet passage in communication with the oil chamber are arranged. Moreover, the second sealing assembly comprises a sealing end cover located on the side of the bearing close to the outside of the pump body; the sealing end cover covers the end of the pump shaft and the end of the bearing, forms a grease chamber in the inside, and is provided with a grease inlet passage and a grease outlet passage in communication with the grease chamber. Based on the above structure, on the one hand, the first sealing assembly can isolate the water in the environment and the bearing by means of the lubricating oil in the oil chamber, and the second sealing assembly can isolate the water in the environment and the bearing by means of the lubricating grease in the grease chamber, so that the water in the environment and the bearing can be isolated by means of the first sealing assembly and the second sealing assembly. On the other hand, the lubricating oil enters the oil chamber from the oil inlet passage and is discharged from the oil outlet passage; the lubricating grease enters the grease chamber from the grease inlet passage and is discharged from the grease outlet passage. Whether the first sealing assembly and the second sealing assembly leak can be judged by observing whether the lubricating grease and the lubricating oil discharged from the oil outlet passage and the grease outlet passage contain water, so that the damage and leakage of the sealing structure can be found in time and repaired in time.

[0042] In the above embodiments of the present application, the description of each embodiment has its own focus, and the parts not described in detail in a certain embodiment can be referred to the related description of other embodiments.

[0043] Furthermore, the terms "first", "second", etc. are used herein only to describe different instances and do not imply or suggest relative importance or a number of the indicated technical features. Thus, the features defined with "first", "second" can include at least one of the features explicitly or implicitly. In the description of the present application, the meaning of "a plurality of" is at least two, for example, two, three, etc., unless otherwise explicitly specified. It should be noted that the terms used herein are only for the purpose of describing specific embodiments, and are not intended to limit the exemplary embodiments according to the present application. As used herein, the singular form is intended to include the plural form, unless the context clearly indicates otherwise, and it should also be understood that, when the terms "comprise" and / or "include" are used in the specification, there is a presence of the features, steps, operations, devices, components and / or combinations thereof.

[0044] The specific embodiments described herein merely exemplify the technical solutions of the present application. Those skilled in the art of the present application can make various modifications or supplements to the described specific embodiments or use similar ways to replace them, without departing from the scope defined by the claims of the present application.

Claims

1. A pump with an underwater bearing lubrication and sealing device, characterized in that, The pump underwater bearing lubrication and sealing device comprises: a pump shaft arranged in the pump body; a bearing arranged at a position close to the end of the pump shaft to rotatably support the pump shaft; a support surrounding the bearing and the outer periphery of the pump shaft; a first sealing assembly arranged on the outer periphery of the pump shaft and located at a side of the bearing close to the inside of the pump body; the first sealing assembly comprises a first mechanical sealing structure, an oil chamber is arranged around the first mechanical sealing structure, and an oil inlet passage and an oil outlet passage in communication with the oil chamber are arranged; a second sealing assembly comprising a sealing end cover arranged at a side of the bearing close to the outside of the pump body; the sealing end cover covers the end of the pump shaft and the end of the bearing, forms a grease chamber in the inside, and is provided with a grease inlet passage and a grease outlet passage in communication with the grease chamber.

2. The underwater bearing lubrication and seal apparatus for a pump of claim 1, wherein, The first sealing assembly further comprises a second mechanical sealing structure; the second mechanical sealing structure is arranged at a side of the first mechanical sealing structure away from the bearing.

3. The underwater bearing lubrication and seal for a pump of claim 2, wherein, The pump shaft is provided with a first shaft sleeve and a second shaft sleeve; the first shaft sleeve is arranged at a side close to the bearing; the first sealing assembly is arranged on the first shaft sleeve, and the second sealing assembly is arranged on the second shaft sleeve.

4. The underwater bearing lubrication and seal apparatus for a pump of claim 3, wherein, The support comprises an outer support and a sealing bush arranged in the inner ring of the outer support; the first mechanical sealing structure and the bearing are arranged in the inner ring of the sealing bush.

5. The underwater bearing lubrication and seal apparatus for a pump of claim 4, wherein, The sealing end cover, the sealing bush and the outer support are connected by bolts; a sealing ring is arranged between the sealing end cover and the sealing bush; a sealing ring is arranged between the sealing bush and the outer support.

6. The underwater bearing lubrication and seal apparatus for a pump of claim 3, wherein, A nut is further arranged at the end of the pump shaft; the nut is threadedly fitted on the pump shaft, and the bearing is limited on the pump shaft between the nut and the first shaft sleeve.

7. The underwater bearing lubrication and seal for a pump of claim 2 wherein, An oil seal structure is further arranged between the first mechanical sealing structure and the bearing.

8. The pump underwater bearing lubrication and sealing device according to claim 1, wherein the oil inlet passage comprises an oil inlet hole in the support in communication with the oil chamber and an external oil inlet pipeline connected with the oil inlet hole; the oil outlet passage comprises an oil outlet hole in the support in communication with the oil chamber and an external oil outlet pipeline connected with the oil outlet hole.

9. The pump underwater bearing lubrication and sealing device according to claim 1, wherein the grease inlet passage comprises a grease inlet hole in the sealing end cover in communication with the grease chamber and an external grease inlet pipeline connected with the grease inlet hole; the grease outlet passage comprises a grease outlet hole in the sealing end cover in communication with the grease chamber and an external grease outlet pipeline connected with the grease outlet hole.

10. A water pump characterized by comprising: The water pump has the pump underwater bearing lubrication and sealing device according to any one of claims 1-9.

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