CN211009254U

CN211009254U - Sealing structure of long-shaft submerged pump and long-shaft submerged pump

Info

Publication number: CN211009254U
Application number: CN201922119018.4U
Authority: CN
Inventors: 王靖; 魏家楷; 宋广海; 钟家俊; 於建
Original assignee: Guangzhou Xinheng Guangyuan Machinery Equipment Co ltd
Current assignee: Guangzhou Xinheng Guangyuan Machinery Equipment Co ltd
Priority date: 2019-11-29
Filing date: 2019-11-29
Publication date: 2020-07-14
Anticipated expiration: 2029-11-29

Abstract

The utility model relates to a pump body seal structure technical field discloses a seal structure and major axis submerged pump of major axis submerged pump, and it includes pump shaft and the first connecting pipe, second connecting pipe and the pump body that from the top set gradually, first connecting pipe with the second connecting pipe passes through the bearing frame and connects, the sealing member is installed to the bottom of bearing frame, the sealing member is located just cup joints in the second connecting pipe outside the pump shaft, be equipped with the cavity in the sealing member, install the skeleton oil blanket in the cavity and be located go up the lower skeleton oil blanket under the skeleton oil blanket, go up the skeleton oil blanket down the skeleton oil blanket the inside wall of cavity with the outside of pump shaft forms sealed chamber jointly, the packing has soft seal to pack in the sealed chamber. The utility model provides a seal structure and major axis submerged pump of major axis submerged pump can absorb the metal debris in the transport medium, increase sealed reliability.

Description

Sealing structure of long-shaft submerged pump and long-shaft submerged pump

Technical Field

The utility model relates to a pump body seal structure technical field especially relates to a seal structure and major axis submerged pump of major axis submerged pump.

Background

The long-shaft submerged pump is suitable for conveying various corrosive media such as belt particles, high viscosity, strong acid, alkali, salt, strong oxidant and the like. Radial and axial motion of the pump shaft can be caused by a variety of factors, such as bearing tolerances, end play, vibration, and pump shaft misalignment. In addition, the conveying medium is easy to leak under the influence of equipment installation tolerance and pump shaft debugging, and the problem of poor sealing effect exists in the aspect of sealing. Moreover, some long-shaft submerged pumps have severe working environments and metal debris is contained in the conveying medium. During the conveying process, the metal scraps are easy to damage the sealing surface of the pump shaft, and the service life of the sealing material is shortened.

SUMMERY OF THE UTILITY MODEL

The utility model aims at: provided are a seal structure of a long-axis submerged pump and the long-axis submerged pump, which can absorb metal debris in a conveying medium and increase the reliability of the seal.

In order to achieve the above purpose, the utility model provides a sealing structure of a long-axis submerged pump, which comprises a pump shaft, a first connecting pipe, a second connecting pipe and a pump body which are sequentially arranged from top to bottom, wherein the pump shaft is vertically arranged in the first connecting pipe, the second connecting pipe and the pump body, the pump body is connected at the bottom of the second connecting pipe,

the pump shaft is characterized in that the first connecting pipe and the second connecting pipe are connected through a bearing seat, the top side of the bearing seat is connected with the first connecting pipe, the bottom side of the bearing seat is connected with the second connecting pipe, the bearing seat is sleeved outside the pump shaft, a sealing element is installed at the bottom of the bearing seat and located in the second connecting pipe in a sleeved mode, a cavity is formed in the sealing element, an upper framework oil seal and a lower framework oil seal located right below the upper framework oil seal are installed in the cavity, a sealing cavity is formed by the upper framework oil seal, the lower framework oil seal, the inner side wall of the cavity and the outer side of the pump shaft together, and soft sealing filler is filled in the sealing cavity.

Preferably, the sealing element further comprises a filling block, filling holes are formed in two sides of the sealing element and communicated with the sealing cavity, and the filling block is detachably connected in the filling holes.

Preferably, the filling block is a plug, the inner wall of the filling hole is provided with an internal thread matched with the external thread of the plug, and the plug is screwed in the filling hole.

Preferably, the cavity has an upward opening, the top of the cavity is provided with an upper gland, the top side of the upper gland is abutted against the bottom side of the bearing seat, the bottom side of the upper gland is abutted against the top side of the upper framework oil seal, the outer side wall of the upper gland is abutted against the inner side wall of the cavity, and the upper gland is sleeved on the outer side of the pump shaft.

Preferably, a filling cavity is formed in the bottom of the sealing element, and a packing is filled in the filling cavity.

Preferably, the opening of the filling cavity is downward, the bottom of the sealing element is connected with a lower gland, and the lower gland is sleeved on the pump shaft and is abutted against the bottom of the packing.

In order to solve the same problem, the embodiment of the utility model provides a still provide a major axis submerged pump, its seal structure that includes the major axis submerged pump of any above-mentioned technical scheme.

The embodiment of the utility model provides a seal structure and major axis submerged pump of major axis submerged pump compare with prior art, and its beneficial effect lies in: the utility model discloses seal structure includes first connecting pipe and second connecting pipe, and first connecting pipe and second connecting pipe pass through the bearing frame and connect, and the bottom of bearing frame is equipped with the sealing member, has seted up the cavity in the sealing member, and last skeleton oil blanket and lower skeleton oil blanket that set up about being equipped with in the cavity go up the skeleton oil blanket and constitute double seal structure with lower skeleton oil blanket, have dustproof and waterproof gas's effect. The upper framework oil seal, the lower framework oil seal, the inner side wall of the cavity and the outer side of the pump shaft jointly form a sealing cavity, soft sealing filler is arranged in the sealing cavity, the soft sealing filler can absorb metal media in conveying media of a long-shaft submerged pump, and the damage to the sealing surface of the pump shaft is avoided, so that the service life of the sealing material is prolonged, and the reliability of the sealing structure is improved.

Drawings

Fig. 1 is a schematic structural diagram of a sealing structure of a long-axis submerged pump provided in an embodiment of the present invention;

fig. 2 is a schematic bottom structure view of a long-axis submerged pump according to an embodiment of the present invention;

fig. 3 is a schematic structural view of a long-axis submerged pump according to an embodiment of the present invention.

In the figure, 1, pump shaft; 2. a first connecting pipe; 3. a second connecting pipe; 4. a pump body; 5. a bearing seat; 6. a bearing; 7. a seal member; 8. an upper framework oil seal; 9. a lower framework oil seal; 10. soft sealing packing; 11. filling blocks; 12. filling the hole; 13. a gland is arranged; 14. packing; 15. a lower gland; 16. a screw; 17. a water outlet; 18. a water inlet; 19. a pump cover; 20. an impeller; 21. a motor; 22. a shaft sleeve; 23. and a gasket.

Detailed Description

The following detailed description of the embodiments of the present invention is provided with reference to the accompanying drawings and examples. The following examples are intended to illustrate the invention, but are not intended to limit the scope of the invention.

In the description of the present invention, it should be understood that the terms used in the present invention are used in the description of the present invention, and it should be understood that the terms "upper", "lower", "vertical", "top", "bottom", "inner", "outer" and the like used in the present invention are used as the terms of the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplification of the description, and do not indicate or imply 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 limiting the present invention.

It should be understood that the terms "first", "second", etc. are used herein to describe various information, but the information should not be limited to these terms, and these terms are only used to distinguish one type of information from another. For example, "first" information may also be referred to as "second" information, and similarly, "second" information may also be referred to as "first" information, without departing from the scope of the present invention.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "connected" and "connected" are to be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

As shown in fig. 1 and 2, a sealing structure of a long-axis submerged pump according to a preferred embodiment of the present invention includes a pump shaft 1, and a first connecting pipe 2, a second connecting pipe 3, and a pump body 4 sequentially disposed from top to bottom, the pump shaft 1 is vertically disposed in the first connecting pipe 2, the second connecting pipe 3, and the pump body 4, the pump body 4 is connected to the bottom of the second connecting pipe 3, the first connecting pipe 2 and the second connecting pipe 3 are connected through a bearing seat 5, the top side of the bearing seat 5 is connected to the first connecting pipe 2, the bottom side of the bearing seat 5 is connected to the second connecting pipe 3, the bearing seat 5 is sleeved outside the pump shaft 1, a bearing 6 is disposed in the bearing seat 5, the bearing 6 abuts against the outer side of the pump shaft 1, a sealing member 7 is mounted at the bottom of the bearing seat 5, the sealing member 7 is disposed in the second connecting pipe 3 and sleeved outside the pump shaft 1, a cavity is disposed in the sealing member 7, an upper, the upper framework oil seal 8, the lower framework oil seal 9, the inner side wall of the cavity and the outer side of the pump shaft 1 form a sealing cavity together, and soft sealing filler 10 is filled in the sealing cavity.

Based on above-mentioned technical scheme, the top side butt of bearing frame 5 is in the bottom side of first connecting pipe 2, and the bottom side butt of bearing frame 5 is in the top side of second connecting pipe 3, and the bolt is passed through with first connecting pipe 2 and the spiro union of second connecting pipe 3 in the both sides of bearing frame 5. The contact surface of bearing frame 5 and first connecting pipe 2 and the contact surface of bearing frame 5 and second connecting pipe 3 all are equipped with sealed 23, and sealed 23 can reduce the frictional resistance of bearing frame 5 and first connecting pipe 2, second connecting pipe 3. The upper framework oil seal 8 and the lower framework oil seal 9 are oil seals, can prevent silt, dust, water gas and the like from invading the pump shaft 1, and play a role in sealing. The upper framework oil seal 8 and the lower framework oil seal 9 are arranged up and down and are arranged face to form double sealing. The soft sealing filler 10 is stored in a sealing cavity formed by the upper framework oil seal 8, the lower framework oil seal 9, the pump shaft 1 and the inner wall of the sealing element 7, so that the space is reasonably utilized, and the installation and the use are convenient. The soft sealing filler 10 can be polymer mud-shaped filler, the friction heat is very small, the friction resistance is small, and the effect of the polymer blocking agent between the fillers ensures that the conveying medium does not leak. The soft sealing packing 10 can absorb metal debris in a medium, so that the sealing reliability is improved, and the service life of the sealing material under severe conditions is prolonged.

Because the seal chamber is a confined space, in order to facilitate the soft sealing filler 10 of packing into, the utility model discloses the seal structure of major axis submerged pump of preferred embodiment still includes filling block 11, and filling hole 12 has all been seted up to sealing member 7's both sides, and filling hole 12 communicates with the seal chamber, and 11 detachably of filling block are connected in filling hole 12. The two filling holes 12 are arranged oppositely, have the functions of filling and deflating, and are beneficial to filling the filling materials into the sealed cavity for many times. When a long-shaft submerged pump is used, the filling block 11 is blocked in the filling hole 12, and the soft sealing packing 10 is prevented from leaking from the filling hole 12. When the soft packing 10 is filled, the filling block 11 is pulled out from the filling hole 12. The filling block 11 is a plug, the inner wall of the filling hole 12 is provided with an internal thread matched with the external thread of the plug, and the plug is screwed in the filling hole 12. The plug is used for preventing the soft sealing filler 10 from leaking, plays a role in sealing, has chemical resistance and is not easy to corrode. In addition, the plug also has cold resistance, does not have frost crack or expansion phenomenon at ultralow temperature, and does not scale or leak. The plug is screwed in the filling hole 12 through threads, which is beneficial to plugging the soft sealing filler 10. Because the soft sealing filler 10 is relatively viscous, when the soft sealing filler 10 is filled, a gun is required to be pressed, a hose is connected to a muzzle, a threaded connector is arranged at one end of the hose and can be matched with threads on the filling hole 12, and a user can fix the threaded connector in the filling hole 12 conveniently. After filling, the filling hole 12 may be sealed with a plug.

Preferably, the cavity opening is upward, in order to press the upper framework oil seal 8 in the cavity, the upper gland 13 is installed at the top of the cavity, the top side of the upper gland 13 is abutted against the bottom side of the bearing seat 5, the bottom side of the upper gland 13 is abutted against the top side of the upper framework oil seal 8, the outer side wall of the upper gland 13 is abutted against the inner side wall of the cavity, and the upper gland 13 is sleeved on the outer side of the pump shaft 1. The upper gland 13 can fix the upper framework oil seal 8, the lower framework oil seal 9 and the soft sealing packing 10 in the cavity to prevent the displacement of the upper framework oil seal, the lower framework oil seal and the soft sealing packing.

In addition, the bottom of the sealing element 7 is provided with a filling cavity, and a packing 14 is filled in the filling cavity. The utility model discloses utilize packing 14 sealed, avoided adopting mechanical seal, can prevent high-speed rotation between pump shaft 1 and the sealing member 7, produce and rub repeatedly, lead to forming the wearing and tearing slot on pump shaft 1, transport medium leaks from the slot. The packing 14 is soft in texture and good in sealing performance, and can avoid the clamping between the pump shaft 1 and the sealing element 7. And the packing sealing structure is adopted, so that a user can conveniently disassemble, assemble and maintain the long shaft submerged pump, and the use cost is reduced. The opening of the filling cavity is downward, the bottom of the sealing element 7 is connected with a lower gland 15, and the lower gland 15 is sleeved on the pump shaft 1 and is abutted to the bottom of the packing 14. Both ends of the lower gland 15 are screwed to the bottom side of the sealing member 7 by screws. The lower pressing cover 15 is used for supporting the packing 14 and fixing the position of the packing 14, and the packing 14 is prevented from falling under the action of self gravity.

In order to solve the same problem, as shown in fig. 3, the present invention further provides a long-axis submerged pump, which includes a sealing structure of the long-axis submerged pump according to any one of the above technical solutions. The long-shaft submerged pump adopts a quadruple sealing structure comprising a soft sealing filler 10, an upper framework oil seal 8, a lower framework oil seal 9 and a packing 14, so that metal fragments in a conveying medium can be absorbed, a good sealing effect is ensured, and the service life of the long-shaft submerged pump is prolonged.

The pump body 4 of the long-shaft submerged pump is in threaded connection with the bottom side of the second connecting pipe 3 through a screw 16. One side of the pump body 4 is provided with a water outlet 17, and the bottom of the pump body 4 is provided with a water inlet 18. The long axis submerged pump also includes a pump cover 19 and an impeller 20. The pump cover 19 is located in the pump body 4 and abuts against the bottom side of the second connection pipe 3. The motor 21 is connected to the top of the pump shaft 1, the bottom of the pump shaft 1 is inserted into the pump cover 19, and the bottom end thereof is inserted into the pump body 4. The impeller 20 is located in the pump body 4 below the pump cover 19, which is provided at the bottom end of the pump shaft 1 that protrudes into the pump body 4. The long-shaft submerged pump also comprises a shaft sleeve 22, and the shaft sleeve 22 is sleeved on the outer side of the bottom of the pump shaft 1.

The utility model discloses a working process does: the first connecting pipe 2 and the second connecting pipe 3 are connected through a bearing seat 5, and a sealing piece 7 is arranged below the bearing seat 5. Be equipped with the ascending cavity of opening in the sealing member 7, install upper framework oil blanket 8 and lower framework oil blanket 9 of symmetry from top to bottom in the cavity, upper framework oil blanket 8 and lower framework oil blanket 9 face-to-face installation constitute dual seal, have improved sealed reliability, can prevent dust, waterproof gas and grease proofing. The upper framework oil seal 8, the lower framework oil seal 9, the inner side wall of the cavity and the outer side of the pump shaft 1 form a sealing cavity together, soft sealing filler 10 is filled in the sealing cavity, a very thin liquid film is generated between the soft sealing filler 10 and the relative motion surface of the pump shaft 1, and the generated friction heat is close to zero due to the action of special materials of the soft sealing filler 10. And the soft sealing packing 10 can absorb metal debris in a conveying medium, so that the sealing reliability is improved, the service life under severe conditions is prolonged, and the long-shaft submerged pump can be applied to environments such as a scale water pool. In order to fill the soft sealing filler 10 into the sealing cavity, the two sides of the sealing element 7 are provided with filling holes 12, and internal threads are arranged in the filling holes 12. When the soft sealing filler 10 is filled, one end of the hose is connected to the gun pressing opening, and the other end provided with the threaded connector is screwed in the filling hole 12. And starting the pressure gun, and injecting the soft sealing filler 10 in the pressure gun into the sealing cavity through the hose. The filling holes 12 also have the function of air release holes, so that air in the sealing cavity is avoided, and the soft sealing filler 10 is not completely filled. In order to prevent the soft sealing packing 10 from leaking out of the filling hole 12, the sealing structure further comprises a plug, wherein the thread of the plug is matched with the internal thread of the filling hole 12 and can be screwed at the opening of the filling hole 12. The soft sealing packing 10 is a third sealing, and in order to provide the sealing performance of the sealing structure, a filling cavity with a downward opening is further formed in the lower portion of the sealing member 7. The packing 14 is arranged in the filling cavity. Mechanical seal is replaced by packing 14 seal, so that the sealing function is achieved, and the risk that the pump shaft 1 and the sealing element 7 are blocked is reduced. The packing 14 seal structure is convenient for dismouting maintenance, can reduce user's cost.

To sum up, the embodiment of the utility model provides a seal structure and major axis submerged pump of major axis submerged pump, it includes first connecting pipe and second connecting pipe, and first connecting pipe and second connecting pipe pass through the bearing frame and connect, and the bottom of bearing frame is equipped with the sealing member, has seted up the cavity in the sealing member, is equipped with the last skeleton oil blanket and the lower skeleton oil blanket that set up from top to bottom in the cavity, goes up the skeleton oil blanket and constitutes double seal structure with lower skeleton oil blanket, has dustproof and waterproof gas's effect. The upper framework oil seal, the lower framework oil seal, the inner side wall of the cavity and the outer side of the pump shaft jointly form a sealing cavity, soft sealing filler is arranged in the sealing cavity, the soft sealing filler can absorb metal media in conveying media of a long-shaft submerged pump, and the damage to the sealing surface of the pump shaft is avoided, so that the service life of the sealing material is prolonged, and the reliability of the sealing structure is improved.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and replacements can be made without departing from the technical principle of the present invention, and these modifications and replacements should also be regarded as the protection scope of the present invention.

Claims

1. A sealing structure of a long-shaft submerged pump is characterized by comprising a pump shaft, a first connecting pipe, a second connecting pipe and a pump body, wherein the first connecting pipe, the second connecting pipe and the pump body are sequentially arranged from top to bottom, the pump shaft is vertically arranged in the first connecting pipe, the second connecting pipe and the pump body, the pump body is connected to the bottom of the second connecting pipe,

2. The seal structure of a long-axis submerged pump according to claim 1, further comprising a filling block, wherein filling holes are formed in both sides of the seal member, the filling holes are communicated with the seal cavity, and the filling block is detachably connected in the filling holes.

3. The seal structure of a long-axis submerged pump according to claim 2, wherein the filling block is a plug, and an inner wall of the filling hole is provided with an internal thread that is engaged with an external thread of the plug, and the plug is screwed into the filling hole.

4. The seal structure of long-axis submerged pump according to claim 1, wherein said cavity has an upward opening, an upper gland is mounted on the top of said cavity, the top side of said upper gland abuts against the bottom side of said bearing seat, the bottom side of said upper gland abuts against the top side of said upper frame oil seal, the outer sidewall of said upper gland abuts against the inner sidewall of said cavity, and said upper gland is sleeved on the outer side of said pump shaft.

5. The seal structure of a long shaft submerged pump according to any one of claims 1 to 4, characterized in that a filling cavity is provided in the bottom of the seal, and a packing set is filled in the filling cavity.

6. The seal structure of long shaft submerged pump according to claim 5, characterized in that the filling cavity is opened downward, and a lower gland is connected to the bottom of the seal, and the lower gland is sleeved on the pump shaft and abuts against the bottom of the packing.

7. A long axis submerged pump comprising a seal structure of the long axis submerged pump as claimed in any one of claims 1 to 6.