Water pump sealing structure

Abstract

The utility model discloses a water pump sealing structure and relates to the technical field of water pump components, a water pump comprises a shaft end, a rotating shaft and a bearing body, and the water pump sealing structure comprises a gland, a packing packing sealing component, a double-framework oil seal component and a drainage component. One end of the gland is connected with the shaft end, and the other end of the gland is connected with the bearing body; the packing packing sealing assembly is arranged at the end, close to the shaft end, in the gland, located between the gland and the rotating shaft and used for sealing liquid in an inner cavity of the water pump. The double-framework oil seal assembly is arranged at the end, close to the bearing body, in the gland, located between the gland and the rotating shaft and used for sealing lubricating oil in the bearing body. The liquid drainage assembly is arranged on the gland and located between the packing packing sealing assembly and the double-framework oil seal assembly. Compared with similar sealing structures, the sealing structure has the advantages that two ends can be sealed, and even if the sealing structure at one end loses efficacy, the work of the other end is not influenced; and two sealing structures are integrated on one gland, so that the structure is more compact.

Description

TECHNICAL FIELD

[0001] The utility model relates to water pump assembly technical field especially relates to a water pump sealing structure. BACKGROUND

[0002] The existing water pump sealing usually adopts mechanical seal or skeleton oil seal to isolate the water pump shaft end and bearing body, when the mechanical seal is installed on the water pump, the service life is extremely low due to the large axial runout, once the failure, the water flow will gush to the bearing box inside, causes the bearing failure, and further causes the main shaft fracture, leads to the sudden failure of the pump work, the major accident, the traditional skeleton oil seal sealing is difficult to achieve no leakage, the bearing may be unable to lubricate and fail due to lubricating oil leakage. The existing sealing technology can solve the leakage problem to a certain extent, but often cannot effectively avoid the interference between the shaft end and the bearing body. In many cases, the sealing failure of the shaft end will directly affect the working state of the bearing, and vice versa. Therefore, the mutual superposition of factors such as wear and tear, temperature rise and the like that the sealing system may face in long-term operation may further affect the working efficiency and stability of the entire water pump. SUMMARY

[0003] In order to solve the above technical problems, the utility model provides a water pump sealing structure, and the specific technical scheme is:

[0004] A water pump sealing structure, the water pump comprises a shaft end, a rotating shaft and a bearing body, the water pump sealing structure comprises:

[0005] A gland, one end of which is connected to the shaft end, and the other end of which is connected to the bearing body, the rotating shaft is arranged to rotate in the gland;

[0006] A packing seal assembly is arranged in the gland near one end of the shaft end and between the gland and the rotating shaft, and is used for sealing the liquid in the water pump cavity;

[0007] A double skeleton oil seal assembly is arranged in the gland near one end of the bearing body and between the gland and the rotating shaft, and is used for sealing the lubricating oil in the bearing body;

[0008] A liquid discharge assembly is arranged on the gland and between the packing seal assembly and the double skeleton oil seal assembly.

[0009] Preferably, a sealing cavity is formed in the inner circumferential side of the gland near one end of the shaft end, and the packing seal assembly comprises:

[0010] A packing group comprises a first packing and a second packing arranged respectively at the two axial ends of the sealing cavity, and a soft packing part is formed between the first packing and the second packing;

[0011] A soft packing injection channel is formed in the packing cover, one end of which is communicated with the sealing cavity, and the other end of which is communicated with the outside of the packing cover, and the soft packing part is injected into the sealing cavity through the soft packing injection channel to form the soft packing.

[0012] Preferably, the packing cover is formed with an oil seal mounting groove on the inner circumferential side of one end of the bearing body, and the double-frame oil seal assembly comprises:

[0013] An oil seal group is arranged axially and side by side along the oil seal mounting groove, and an oil return cavity is formed between the first oil seal and the second oil seal.

[0014] An oil return channel is communicated with the oil return cavity and the inner cavity of the bearing body.

[0015] Preferably, the oil return channel comprises an oil throwing groove arranged on the inner side wall of the oil return cavity, and an oil return groove arranged at the bottom of the oil throwing groove, and the oil return groove extends towards the bearing body.

[0016] Preferably, the liquid discharge assembly comprises:

[0017] A liquid collecting cavity is arranged around the inner circumferential side of the packing cover and is communicated with the packing ring packing seal assembly and the double-frame oil seal assembly.

[0018] A liquid leakage groove is arranged at the bottom of the liquid collecting cavity and is communicated with the outside of the packing cover.

[0019] Preferably, the soft packing injection channel comprises:

[0020] A liquid injection hole is arranged on the packing cover.

[0021] A dispersion groove is arranged on the inner side wall of the sealing cavity, and the dispersion groove extends circumferentially along the sealing cavity.

[0022] A communication groove is arranged in the packing cover and extends axially along the packing cover, and the communication groove is communicated with the liquid injection hole and the dispersion groove.

[0023] Preferably, a plug is detachably connected to the liquid injection hole.

[0024] Preferably, the rotating shaft comprises a shaft body and a shaft sleeve which are sequentially sleeved from inside to outside.

[0025] The water pump sealing structure has the following beneficial effects:

[0026] 1. Compared with similar sealing structures, both ends can be sealed, and even if the sealing structure of one end fails, it will not affect the work of the other end.

[0027] 2. The two sealing structures are integrated on one packing cover, and the structure is more compact.

[0028] Further, referring to the drawings, the sealing cavity is formed near the inner circumferential side of the shaft end of the gland, and the packing seal assembly comprises a packing group, a soft packing part and a soft packing injection channel. BRIEF DESCRIPTION OF DRAWINGS

[0029] In order to more clearly illustrate the technical scheme in the embodiments of the present application or the prior art, the drawings needed to be used in the following embodiment or prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments described in the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0030] Figure 1 The installation structure schematic view of the water pump sealing structure provided by the embodiment of the present application on the water pump is shown in the figure.

[0031] Figure 2 The installation structure sectional view of the water pump sealing structure provided by the embodiment of the present application on the water pump is shown in the figure.

[0032] Figure 3 For Figure 2 The local enlarged view of part A in the figure.

[0033] Reference signs

[0034] 10-shaft end; 20-rotating shaft; 201-shaft body; 202-shaft sleeve; 30-bearing body;

[0035] 1-gland; 11-sealing cavity; 12-oil seal installation groove;

[0036] 2-packing seal assembly; 21-packing group; 211-first packing; 212-second packing; 22-soft packing part; 23-soft packing injection channel; 231-injection hole; 232-distribution groove; 233-communication groove;

[0037] 3-double skeleton oil seal assembly; 31-oil seal group; 311-first oil seal; 312-second oil seal; 32-oil return cavity; 33-oil return channel; 331-oil throwing groove; 332-oil return groove;

[0038] 4-liquid discharge assembly; 41-liquid collection cavity; 42-liquid leakage groove. DETAILED DESCRIPTION

[0039] In order to make those skilled in the art better understand the technical scheme of the present application, the present application will be described in detail below in combination with the drawings, and the description in this part is only exemplary and explanatory, and should not have any limiting effect on the protection scope of the present application.

[0040] It should be noted that like reference numerals refer to like elements throughout the several views of the drawings, and that, as such, when a part after its initial definition is referred to in a subsequent drawing it should not be construed that it needs to be further defined and explained.

[0041] It should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like, indicate an absolute position or location relationship based on the position or location relationship shown in the drawings, or the position or location relationship when the utility model product is usually placed, and are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model. In addition, the terms "first", "second", and the like are only used for differentiation and cannot be understood as indicating or implying relative importance.

[0042] In addition, the terms "horizontal", "vertical", "suspension", and the like do not mean that the components must be absolutely horizontal or suspended, 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.

[0043] In the description of the utility model, it should be noted that, unless otherwise specified and limited, the terms "set", "mount", "connected", "connected" should be broadly understood, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication between two elements. For those skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0044] Please refer to Figures 1 to 3 The water pump sealing structure comprises a gland 1, a packing packing seal assembly 2, a double skeleton oil seal assembly 3 and a liquid discharge assembly 4.

[0045] The one end of the gland 1 is connected with the shaft end 10, and the other end is connected with the bearing body 30. The rotating shaft 20 is arranged in the gland 1.

[0046] The packing packing seal assembly 2 is arranged in the gland 1 near one end of the shaft end 10 and between the gland 1 and the rotating shaft 20, and is used for sealing the liquid in the water pump cavity.

[0047] The double skeleton oil seal assembly 3 is arranged in the gland 1 near one end of the bearing body 30 and between the gland 1 and the rotating shaft 20, and is used for sealing the lubricating oil in the bearing body 30.

[0048] The drainage assembly 4 is arranged on the gland 1 and located between the packing seal assembly 2 and the double skeleton oil seal assembly 3.

[0049] The packing seal assembly 2 between the gland 1 and the shaft 20 can seal the shaft end 10, and the soft packing and the packing are used to seal the liquid in the pump body. The double skeleton oil seal assembly 3 between the gland 1 and the shaft 20 can seal the bearing body 30. The double skeleton oil seal structure can provide better sealing effect. Even if one end of the sealing structure fails, the leakage can be drained out of the gland 1 through the drainage assembly 4, so as to not affect the work of the other end. Compared with similar sealing structures, both ends can be sealed: the left end soft packing and the packing are used to seal the liquid in the pump body; and the right end double skeleton oil seal is used to seal the lubricating oil at the bearing body 30.

[0050] The water pump sealing structure provided by the embodiment has the following beneficial effects:

[0051] 1. Compared with similar sealing structures, both ends can be sealed. Even if one end of the sealing structure fails, the work of the other end is not affected.

[0052] 2. The two sealing structures are integrated on the gland 1, and the structure is more compact.

[0053] Further, please refer to Figure 3 The inner circumferential side of the gland 1 near the shaft end 10 forms a sealing cavity 11. The packing seal assembly 2 includes a packing group 21, a soft packing part 22 and a soft packing injection channel 23.

[0054] The packing group 21 includes a first packing 211 and a second packing 212 arranged at the two axial ends of the sealing cavity 11 respectively. The first packing 211 and the second packing 212 form the soft packing part 22 therebetween.

[0055] One end of the soft packing injection channel 23 communicates with the sealing cavity 11, and the other end communicates with the outside of the gland 1. The soft packing part 22 is formed by injecting soft packing into the sealing cavity 11 through the soft packing injection channel 23.

[0056] During assembly, the two packings can be first installed in the sealing cavity 11, and then the gland 1 is installed on the shaft 20. After the installation position is adjusted, the soft packing is injected into the sealing cavity 11 through the soft packing injection channel 23 by using a professional soft packing gun. After the sealing cavity 11 is filled, the soft packing injection channel 23 is plugged to complete the sealing. The soft packing is convenient to add, and there is no need to flush and stop for maintenance, which reduces the maintenance workload. When the leakage increases, the soft packing can be added without stopping, which avoids rapid deterioration and affects the bearing box.

[0057] Further, please continue to refer to Figure 3The oil seal mounting groove 12 is formed on the inner circumferential side of the one end of the bearing body 30 adjacent to the gland 1, and the double skeleton oil seal assembly 3 comprises an oil seal group 31, an oil return cavity 32 and an oil return channel 33.

[0058] The oil seal group 31 comprises a first oil seal 311 and a second oil seal 312 arranged axially and side by side along the oil seal mounting groove 12, and the oil return cavity 32 is formed between the first oil seal 311 and the second oil seal 312.

[0059] The oil return channel 33 communicates the oil return cavity 32 and the inner cavity of the bearing body 30.

[0060] The two skeleton oil seals can be pushed into the gland 1 according to the standard installation method, so as to be installed in the oil seal mounting groove 12. When a small amount of leakage occurs, the rotating shaft 20 can throw the lubricating oil to the oil return cavity 32, and then flow back to the bearing body 30 through the oil return channel 33, so as to prevent the lubricating oil from climbing and leaking along the main shaft.

[0061] Further, please continue to refer to Figure 3 The oil return channel 33 comprises a oil throwing groove 331 arranged on the inner side wall of the oil return cavity 32, and an oil return groove 332 arranged at the bottom of the oil throwing groove 331, and the oil return groove 332 extends towards the bearing body 30.

[0062] Further, the liquid drainage assembly 4 comprises a liquid collecting cavity 41 and a liquid leakage groove 42.

[0063] The liquid collecting cavity 41 is arranged around the inner circumferential side of the gland 1, and communicates the packing seal assembly 2 and the double skeleton oil seal assembly 3.

[0064] The liquid leakage groove 42 is arranged at the bottom of the liquid collecting cavity 41 and communicates to the outside of the gland 1.

[0065] If one of the two sealing structures fails, the liquid can flow into the liquid leakage groove 42 through the liquid collecting cavity 41, and then flow out of the gland 1 from the liquid leakage groove 42, so as to avoid the deterioration of the failure caused by the accumulation of the liquid.

[0066] Further, the soft packing injection channel 23 comprises an injection hole 231, a dispersion groove 232 and a communication hole 233.

[0067] The injection hole 231 is arranged on the gland 1.

[0068] The dispersion groove 232 is arranged on the inner side wall of the sealing cavity 11, and extends circumferentially along the sealing cavity 11.

[0069] The communication groove 233 is arranged in the gland 1 and extends axially along the gland 1, and communicates the injection hole 231 and the dispersion groove 232.

[0070] The liquid injection hole 231 can be a filling screw hole, and the dispersion groove 232 can have a structure of being narrow at the top and wide at the bottom, and the wide lower part is smoothly connected with the inner side wall of the sealing cavity 11, so as to facilitate the uniform distribution of the soft packing in the sealing cavity 11.

[0071] Further, a plug can be detachably connected to the liquid injection hole 231, and the plug can be a threaded pipe plug.

[0072] Further, the rotating shaft 20 comprises a shaft body 201 and a shaft sleeve 202 which are sequentially sleeved from inside to outside.

[0073] Principle description:

[0074] The packing and packing ring sealing assembly 2 between the gland 1 and the rotating shaft 20 can seal the shaft end 10 of the water pump, and the sealing characteristics of the soft packing and the packing ring are used to seal the liquid in the inner cavity of the pump body, and the double skeleton oil seal assembly 3 between the gland 1 and the rotating shaft 20 can seal the bearing body 30, and the double skeleton oil seal structure makes the sealing effect better, even if the sealing structure of one end fails, the liquid leakage can also be discharged out of the gland 1 through the liquid discharge assembly 4, so as to not affect the work of the other end. Compared with similar sealing structures, both ends can be sealed: the left end soft packing and the packing ring are used to seal the liquid in the inner cavity of the pump body; and the right end two skeleton oil seals are used to seal the lubricating oil at the bearing body 30.

[0075] It should be noted that in this document, the terms "comprising", "containing", or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such a process, method, article or device.

[0076] The principle and implementation mode of the present application are described by using specific examples in this document, and the above example is only used to help understand the method and its core idea. The above is only a preferred embodiment of the present application, and it should be pointed out that due to the limitation of language expression, there are infinite specific structures, and for ordinary skilled persons in the technical field, some improvements, decorations or changes can be made without departing from the principle of the present application, and the above technical features can be combined in a proper way; these improvements, decorations, changes or combinations, or the direct application of the concept and technical scheme of the present application to other occasions without improvement, should be regarded as the protection scope of the present application.

Claims

1. A water pump seal structure characterized by comprising: The water pump comprises a shaft end (10), a rotating shaft (20) and a bearing body (30), and the water pump sealing structure comprises: a gland (1) connected to the shaft end (10) at one end and connected to the bearing body (30) at the other end, the rotating shaft (20) being rotatably arranged in the gland (1); a packing seal assembly (2) arranged in the gland (1) near the shaft end (10) at one end and between the gland (1) and the rotating shaft (20), used for sealing the liquid in the water pump; a double-skeleton oil seal assembly (3) arranged in the gland (1) near the bearing body (30) at one end and between the gland (1) and the rotating shaft (20), used for sealing the lubricating oil in the bearing body (30); a liquid discharge assembly (4) arranged on the gland (1) and between the packing seal assembly (2) and the double-skeleton oil seal assembly (3).

2. The water pump sealing structure according to claim 1, characterized by, The gland (1) is formed with a sealing cavity (11) on the inner circumferential side near the shaft end (10), and the packing seal assembly (2) comprises: a packing group (21) comprising a first packing (211) and a second packing (212) arranged at the two axial ends of the sealing cavity (11) respectively, a soft packing portion (22) being formed between the first packing (211) and the second packing (212); a soft packing injection channel (23) communicating with the sealing cavity (11) at one end and communicating with the outside of the gland (1) at the other end, the soft packing portion (22) being injected with soft packing into the sealing cavity (11) through the soft packing injection channel (23).

3. The water pump sealing structure of claim 1, wherein The gland (1) is formed with an oil seal mounting groove (12) on the inner circumferential side near the bearing body (30), and the double-skeleton oil seal assembly (3) comprises: an oil seal group (31) comprising a first oil seal (311) and a second oil seal (312) arranged side by side along the oil seal mounting groove (12) in the axial direction, an oil return cavity (32) being formed between the first oil seal (311) and the second oil seal (312); an oil return channel (33) communicating with the oil return cavity (32) and the inner cavity of the bearing body (30).

4. The water pump sealing structure of claim 3, wherein The oil return channel (33) comprises a oil throwing groove (331) arranged on the inner side wall of the oil return cavity (32) and an oil return groove (332) arranged at the bottom of the oil throwing groove (331), the oil return groove (332) extending towards the bearing body (30).

5. The water pump sealing structure of claim 1, wherein The liquid discharge assembly (4) comprises: a liquid collecting cavity (41) arranged around the inner circumferential side of the gland (1) and communicating with the packing seal assembly (2) and the double-skeleton oil seal assembly (3); a liquid leakage groove (42) arranged at the bottom of the liquid collecting cavity (41) and communicating with the outside of the gland (1).

6. The water pump sealing structure of claim 2, wherein The soft packing injection channel (23) comprises: an injection hole (231) arranged on the gland (1); a dispersion groove (232) arranged on the inner side wall of the sealing cavity (11), the dispersion groove (232) extending circumferentially along the sealing cavity (11); a communication groove (233) arranged in the gland (1) and extending axially along the gland (1), the communication groove (233) communicating the injection hole (231) and the dispersion groove (232).

7. The water pump sealing structure of claim 6, wherein A plug is detachably connected to the liquid injection hole (231).

8. The water pump sealing structure of claim 1, wherein The rotating shaft (20) comprises a shaft body (201) and a shaft sleeve (202) which are sequentially sleeved from inside to outside.

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