Dry gas sealing device for slurry pump

Abstract

The dry gas sealing device for the slurry pump comprises a shaft sleeve, and a flange, a packing assembly, a gland assembly, a movable and static ring mechanism and a fixing assembly are arranged on the shaft sleeve. The slurry pump comprises a pump body and a pump shaft, and the shaft sleeve is arranged on the pump shaft and extends into the pump body; the packing assembly is arranged between the movable and static ring mechanism and the flange, the movable and static ring mechanism and the packing assembly are both arranged in the gland assembly, and an air inlet hole is formed in the gland assembly; the fixing assembly is arranged above the gland assembly and limits the gland assembly. The dynamic and static ring mechanism and the packing assembly are both arranged in the gland assembly, a flange is arranged below the packing assembly, slag slurry is blocked by the packing assembly after entering a gap of the flange, meanwhile, a shaft seal is further arranged above the packing assembly, and the packing assembly and the shaft seal are matched to protect the dynamic and static ring mechanism. And the slag slurry cannot continuously immerse into the movable and static ring mechanism and the gland assembly, so that the service life of the dry gas sealing element can be prolonged.

Description

Technical Field

[0001] The utility model belongs to the technical field of dry gas seals, and particularly relates to a dry gas seal device for a slurry pump. Background Art

[0002] A dry gas seal belongs to a device that uses a gas film to seal and isolate media. Its working principle is to generate a gas film inside itself through high-speed rotation, and use the gas film to isolate the media at both ends; when the slurry pump works, the pump shaft rotates at a high speed, which will cause the slurry to splash. Ordinary dry gas seals do not have a protection structure, and impurities or slurry can enter the inside of the dry gas seal and accumulate in the static and dynamic ring mechanisms of the dry gas seal, causing wear or damage to the dry gas seal and reducing the service life of the dry gas seal. Summary of the Utility Model

[0003] The purpose of the utility model is to provide a dry gas seal device for a slurry pump. A packing assembly, a gland assembly and a static and dynamic ring mechanism are arranged on the shaft sleeve. The static and dynamic ring mechanism and the packing assembly are both arranged in the gland assembly. A flange is arranged below the packing assembly. After the slurry invades the gap of the flange, it is blocked by the packing assembly, so that it cannot continue to invade the inside of the static and dynamic ring mechanism and the gland assembly, thereby prolonging the service life of the dry gas seal.

[0004] The utility model is realized through the following technical solutions:

[0005] A dry gas seal device for a slurry pump includes a shaft sleeve. A flange, a packing assembly, a gland assembly, a static and dynamic ring mechanism and a fixing assembly are arranged on the shaft sleeve; the slurry pump includes a pump body and a pump shaft. The shaft sleeve is arranged on the pump shaft and extends into the pump body; the packing assembly is arranged between the static and dynamic ring mechanism and the flange, and the packing assembly is used to prevent the slurry from entering the static and dynamic ring mechanism; the static and dynamic ring mechanism and the packing assembly are both arranged in the gland assembly, and an air inlet hole is arranged on the gland assembly; the fixing assembly is arranged above the gland assembly and limits the gland assembly.

[0006] Further, the gland assembly includes a lower gland and an upper gland. The lower gland and the upper gland are connected and fixed by connecting bolts. The upper gland is arranged above the lower gland. The air inlet hole is arranged on the side surface of the upper gland. The packing assembly is arranged between the lower gland and the shaft sleeve; the end of the lower gland is connected to the flange by screws.

[0007] Further, the packing assembly includes two packing rings arranged in parallel and a limiting member. The two packing rings are arranged between the shaft sleeve and the limiting member. The limiting member abuts against the packing rings and the lower gland to fix the packing rings.

[0008] Further, a shaft seal is arranged between the lower gland and the shaft sleeve above the limiting member. Both sides of the shaft seal abut against the lower gland and the shaft sleeve respectively.

[0009] Furthermore, the moving and static ring mechanism includes a moving ring and a static ring assembly. The static ring assembly includes a first static ring and a second static ring. The first static ring and the second static ring are arranged at intervals. The moving ring is arranged between the first static ring and the second static ring. The first static ring abuts against the lower gland, and the second static ring abuts against the upper gland.

[0010] Furthermore, elastic components are arranged on both the first static ring and the second static ring. The elastic component includes a spring and a abutting member. The spring is arranged between the abutting member and the first static ring or the second static ring. The abutting member abuts against the lower gland or the upper gland.

[0011] Furthermore, the fixing component includes a connecting piece and a fixing screw. The connecting piece is connected to the shaft sleeve. A threaded hole is arranged on the connecting piece. The fixing screw passes through the connecting piece and abuts against the pump shaft.

[0012] Furthermore, a fixing block is arranged on the upper gland. A limiting groove is arranged on the side of the fixing block. A flange is arranged on one side of the connecting piece. The flange is inserted and matched with the limiting groove and is rotationally connected. The fixing block and the upper gland are connected by a fixing bolt.

[0013] Compared with the prior art, the present utility model has the following advantages and beneficial effects:

[0014] In the present utility model, a packing assembly, a gland assembly and a moving and static ring mechanism are arranged on the shaft sleeve. The moving and static ring mechanism and the packing assembly are both arranged in the gland assembly. A flange is arranged below the packing assembly. After the slurry invades the gap of the flange, it is blocked by the packing assembly. At the same time, a shaft seal is also arranged above the packing assembly. The packing assembly and the shaft seal cooperate to protect the moving and static ring mechanism, so that the slurry cannot continue to invade the inside of the moving and static ring mechanism and the gland assembly, thereby extending the service life of the dry gas seal. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present utility model, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can also be obtained based on these drawings without creative efforts.

[0016] Figure 1 It is a schematic cross-sectional structure diagram of the dry gas seal device for a slurry pump of the present utility model.

[0017] Wherein: 1 - shaft sleeve, 2 - flange, 3 - packing assembly, 31 - packing ring, 32 - limiting member, 4 - lower gland, 5 - upper gland, 51 - air inlet hole, 6 - stationary ring assembly, 61 - first stationary ring, 62 - second stationary ring, 7 - rotating ring, 8 - elastic assembly, 81 - abutting member, 82 - spring, 9 - fixing assembly, 91 - connecting member, 92 - fixing screw, 10 - shaft seal, 11 - fixing block, 12 - pump body, 13 - pump shaft. Detailed implementation mode

[0018] To make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are some but not all of the embodiments of the present utility model.

[0019] Embodiment 1:

[0020] The main structure of this embodiment, a dry gas seal device for a slurry pump, as Figure 1 shown, includes a shaft sleeve 1, on which a flange 2, a packing assembly 3, a gland assembly, a stationary and rotating ring mechanism and a fixing assembly 9 are provided; the slurry pump includes a pump body 12 and a pump shaft 13, the shaft sleeve 1 is arranged on the pump shaft 13 and extends into the pump body 12, and the shaft sleeve 1 is fixed on the pump shaft 13 through the fixing assembly 9 and rotates with the pump shaft 13; the packing assembly 3 is arranged between the stationary and rotating ring mechanism and the flange 2, and the packing assembly 3 is used to prevent slurry from entering the stationary and rotating ring mechanism, the flange 2 is arranged at the lowermost end, and the flange 2 is used to play a role in closing and connecting, and the flange 2 and the gland assembly are fixedly connected by screws; both the stationary and rotating ring mechanism and the packing assembly 3 are arranged under the gland assembly, the lower gland 4 plays a protective role for the stationary and rotating ring mechanism, and at the same time, an air inlet hole 51 is provided on the gland assembly, so that an isolation gas film can be generated when the stationary and rotating ring mechanism rotates; the fixing assembly 9 is arranged above the gland assembly and limits the gland assembly; the gland assembly includes a lower gland 4 and an upper gland 5, the lower gland 4 and the upper gland 5 are fixedly connected by connecting bolts, the upper gland 5 is arranged above the lower gland 4, the air inlet hole 51 is arranged on the side of the upper gland 5 and communicates with the stationary and rotating ring mechanism, and the packing assembly 3 is arranged between the lower gland 4 and the shaft sleeve 1 to play a protective role for the stationary and rotating ring mechanism and prevent slurry from entering the stationary and rotating ring mechanism when the pump shaft 13 rotates and causing wear to it.

[0021] Embodiment 2:

[0022] On the basis of the above embodiment, this embodiment further defines the packing assembly 3. The packing assembly 3 includes two packing rings 31 arranged in parallel and a limiting member 32. The limiting member 32 limits the two packing rings 31. The two packing rings 31 are arranged between the shaft sleeve 1 and the limiting member 32. The limiting member 32 abuts against the packing rings 31 and the lower gland 4 to fix the packing rings 31. Above the limiting member 32, a shaft seal 10 is further arranged between the lower gland 4 and the shaft sleeve 1. The outer side and the inner side of the shaft seal 10 respectively abut against the lower gland 4 and the shaft sleeve 1. The shaft seal 10 is used to further prevent the slag slurry from invading the dynamic and static ring mechanism. Other parts of this embodiment are the same as those of the above embodiment and will not be described in detail here.

[0023] Embodiment 3:

[0024] On the basis of the above embodiment, this embodiment further defines the dynamic and static ring mechanism. The dynamic and static ring mechanism includes a dynamic ring 7 and a static ring assembly 6. The static ring assembly 6 includes a first static ring 61 and a second static ring 62. The first static ring 61 and the second static ring 62 are arranged at intervals. The dynamic ring 7 is arranged between the first static ring 61 and the second static ring 62. The dynamic ring 7 rotates between the first static ring 61 and the second static ring 62 to generate an air film inside the gland assembly. The first static ring 61 abuts against the lower gland 4, and the second static ring 62 abuts against the upper gland 5. Elastic components 8 are arranged on both the first static ring 61 and the second static ring 62. The elastic components 8 are used to squeeze the first static ring 61 and the second static ring 62 so that the first static ring 61 and the second static ring 62 limit the dynamic ring 7 to prevent the dynamic ring 7 from displacing. The elastic component 8 includes a spring 82 and a contact member 81. The spring 82 and the contact member 81 of the first static ring 61 are arranged between the first static ring 61 and the lower gland 4. The contact member 81 is connected to the spring 82 and abuts against the lower gland 4. The spring 82 and the contact member 81 of the second static ring 62 are arranged between the second static ring 62 and the upper gland 5. The contact member 81 is connected to the spring 82 and abuts against the upper gland 5.

[0025] Embodiment 4:

[0026] On the basis of the above embodiment, this embodiment further defines the fixing assembly 9. The fixing assembly 9 includes a connecting member 91 and fixing screws 92. The connecting member 91 is arranged at the end of the shaft sleeve 1 and is connected to the shaft sleeve 1. A threaded hole is arranged on the connecting member 91, and the threaded hole communicates with the pump shaft 13. The fixing screws 92 pass through the connecting member 91 and abut against the pump shaft 13 to fix the shaft sleeve 1 and the pump shaft 13. A fixing block 11 is arranged on the upper gland 5. A limiting groove is arranged on the side of the fixing block 11. A flange is arranged on one side of the connecting member 91. The flange is inserted and rotatably connected with the limiting groove. The connecting member 91 limits the fixing block 11 to determine the installation positions of the gland assembly and the flange 2 on the shaft sleeve 1, facilitating the assembly of parts. The fixing block 11 and the upper gland 5 are connected and fixed by fixing bolts. Other parts of this embodiment are the same as those of the above embodiment and will not be described in detail here.

[0027] 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 drawings, or the orientation or positional relationship in which the utility model 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. Therefore, it should not be construed as a limitation to the present utility model.

[0028] In addition, when the terms "horizontal" and "vertical" appear in the description of the present utility model, it does not mean that the components are required to be absolutely horizontal or hanging vertically, but they can be slightly inclined. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and it does not mean that the structure must be completely horizontal, but it can be slightly inclined.

[0029] In the description of the present utility model, it should also be noted that unless otherwise clearly specified and defined, if the terms "set", "installed", "connected", "connected" are 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 it 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.

[0030] The above is only the preferred embodiment of the present utility model, and it does not impose any form of limitation on the present utility model. Any simple modification or equivalent change made to the above embodiments based on the technical essence of the present utility model falls within the protection scope of the present utility model.

Claims

1. A dry gas seal device for a slurry pump, characterized in that It includes a shaft sleeve, on which a flange, a packing assembly, a gland assembly, a moving and static ring mechanism and a fixing assembly are provided; the slurry pump includes a pump body and a pump shaft, the shaft sleeve is arranged on the pump shaft and extends into the pump body; the packing assembly is arranged between the moving and static ring mechanism and the flange, and the packing assembly is used to prevent slurry from entering the moving and static ring mechanism; both the moving and static ring mechanism and the packing assembly are arranged in the gland assembly, and an air inlet hole is provided on the gland assembly; the fixing assembly is arranged above the gland assembly and limits the gland assembly.

2. The dry gas seal device for a slurry pump according to claim 1, characterized in that, The gland assembly includes a lower gland and an upper gland, the lower gland and the upper gland are connected and fixed by connecting bolts, the upper gland is arranged above the lower gland, the air inlet hole is arranged on the side of the upper gland, and the packing assembly is arranged between the lower gland and the shaft sleeve; the end of the lower gland is connected to the flange by screws.

3. The dry gas seal device for a slurry pump according to claim 2, wherein The packing assembly includes two juxtaposed packing rings and a limiting member, the two packing rings are arranged between the shaft sleeve and the limiting member, and the limiting member abuts against the packing rings and the lower gland to fix the packing rings.

4. The dry gas seal device for a slurry pump according to claim 3, characterized in that, A shaft seal is arranged between the lower gland and the shaft sleeve above the limiting member, and both sides of the shaft seal abut against the lower gland and the shaft sleeve respectively.

5. The dry gas seal device for a slurry pump according to claim 1, characterized in that, The moving and static ring mechanism includes a moving ring and a static ring assembly, the static ring assembly includes a first static ring and a second static ring, the first static ring and the second static ring are arranged at intervals, the moving ring is arranged between the first static ring and the second static ring, the first static ring abuts against the lower gland, and the second static ring abuts against the upper gland.

6. The dry gas seal device for a slurry pump according to claim 5, wherein, Elastic components are arranged on both the first static ring and the second static ring, the elastic components include springs and abutting members, the springs are arranged between the abutting members and the first static ring or the second static ring, and the abutting members abut against the lower gland or the upper gland.

7. The dry gas seal device for a slurry pump according to claim 2, characterized in that, The fixing assembly includes a connecting piece and fixing screws, the connecting piece is connected to the shaft sleeve, a threaded hole is provided on the connecting piece, and the fixing screws pass through the connecting piece and abut against the pump shaft.

8. The dry gas seal device for slurry pump according to claim 7, characterized in that, A fixing block is arranged on the upper gland, and a limiting groove is arranged on the side of the fixing block; a flange is arranged on one side of the connecting piece, and the flange is inserted and rotatably connected with the limiting groove; the fixing block and the upper gland are connected by fixing bolts.

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