CN220687654U - Vertical pipeline sewage pump with mechanical seal oil chamber - Google Patents
Vertical pipeline sewage pump with mechanical seal oil chamber Download PDFInfo
- Publication number
- CN220687654U CN220687654U CN202322084947.2U CN202322084947U CN220687654U CN 220687654 U CN220687654 U CN 220687654U CN 202322084947 U CN202322084947 U CN 202322084947U CN 220687654 U CN220687654 U CN 220687654U
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- Prior art keywords
- pump
- mechanical seal
- oil
- oil chamber
- motor
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- 239000010865 sewage Substances 0.000 title claims abstract description 31
- 239000003921 oil Substances 0.000 claims abstract description 96
- 239000010687 lubricating oil Substances 0.000 claims abstract description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 13
- 238000002347 injection Methods 0.000 claims description 5
- 239000007924 injection Substances 0.000 claims description 5
- 238000007599 discharging Methods 0.000 claims description 4
- 239000004519 grease Substances 0.000 claims 1
- 239000007788 liquid Substances 0.000 description 7
- 239000012535 impurity Substances 0.000 description 4
- 230000002035 prolonged effect Effects 0.000 description 4
- 230000003068 static effect Effects 0.000 description 4
- 238000009837 dry grinding Methods 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- 230000002411 adverse Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011797 cavity material Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000013049 sediment Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
Landscapes
- Structures Of Non-Positive Displacement Pumps (AREA)
- Mechanical Sealing (AREA)
Abstract
The utility model discloses a vertical pipeline sewage pump with a mechanical seal oil chamber, which relates to the field of sewage pumps and comprises a motor, a pump head, a pump body and a pump shaft, wherein the pump body is provided with a pump cover; the inner wall of the pump head, which is close to one side of the pump cover, is matched with the pump cover to form an oil chamber for injecting lubricating oil, a mechanical seal is sleeved on the outer wall of the pump shaft, the mechanical seal is arranged in the oil chamber and immersed in the lubricating oil, the lower end of the mechanical seal seals the oil chamber relative to the inner cavity of the pump body, and the upper end of the mechanical seal seals the oil chamber relative to the motor. The utility model can isolate the sewage conveyed by the pump from the mechanical seal, and prevent the mechanical seal from leaking water due to sewage; in addition, a gap is designed between the pump head and the motor, so that the motor is prevented from being damaged after the mechanical seal fails.
Description
Technical Field
The utility model relates to the field of sewage pumps, in particular to a vertical pipeline sewage pump with a mechanical seal oil chamber.
Background
For the existing pipeline pump, the inlet and the outlet are positioned on the same horizontal line, so that the pipeline pump is convenient to install in a pipeline. The medium is clean and impurity-free liquid, and leakage is prevented between the liquid in the pump and the outside atmosphere mainly by mechanical seal. Because the installation position of the mechanical seal is in the same chamber with the conveyed medium when the common pipeline pump is designed, the mechanical seal is immersed in the conveyed liquid when the water pump is operated, and the conveyed medium is clean and free of impurities, the sealing performance of the mechanical seal is not adversely affected. However, the mechanical seal dynamic and static ring grinding surface of the pump is positioned at the uppermost end of the whole pump structure, gas is easy to accumulate at the upper part in the operation process of the pump, and water leakage is caused by dry grinding of the mechanical seal dynamic and static ring.
In particular, there is a type of pipeline pump, called a pipeline sewage pump, which is specially used for transporting sewage, and the type of pump is mainly used for transporting sewage containing impurities such as sediment, fiber and the like. However, it is worth noting that the design of the installation position of the mechanical seal of the conventional pipeline sewage pump is still the same as that of a common conventional centrifugal pipeline pump for conveying clean liquid, the structure is not different, the special design is not carried out on the conveyed sewage medium, the mechanical seal is immersed in the liquid containing impurities when the water pump is operated, the mechanical seal is easy to cause the reduction of sealing performance and even water leakage due to the impurities, and further the reliability and the service life of the product are adversely affected.
In addition, the flange end face of the motor of the existing water pump with the oil chamber structure is attached to the oil chamber, and under the condition that mechanical sealing fails, conveyed liquid easily enters the motor to cause damage to the motor.
Disclosure of Invention
The utility model aims to overcome the defects in the prior art, and provides a vertical pipeline sewage pump with a mechanical seal oil chamber, which realizes isolation of the oil chamber, sewage and mechanical seal, and simultaneously isolates a motor from the oil chamber.
The utility model aims at being completed by the following technical scheme: the vertical pipeline sewage pump with the mechanical seal oil chamber comprises a motor, a pump head, a pump body and a pump shaft, wherein a pump cover is arranged on the pump body, the lower end of the pump head is fixed on the pump cover, the upper end of the pump head is fixed with the motor, one end of the pump shaft is driven by the motor, and the other end of the pump shaft sequentially penetrates through the pump head and the pump cover and stretches into the pump body for connecting and driving an impeller; the inner wall of the pump head, which is close to one side of the pump cover, is matched with the pump cover to form an oil chamber for injecting lubricating oil, a mechanical seal is sleeved on the outer wall of the pump shaft, the mechanical seal is arranged in the oil chamber and immersed in the lubricating oil, the lower end of the mechanical seal seals the oil chamber relative to the inner cavity of the pump body, and the upper end of the mechanical seal seals the oil chamber relative to the motor.
As a further technical scheme, the inner wall of the pump head, which is close to one side of the motor, is matched with the motor flange to form a clearance cavity, the clearance cavity is communicated with the oil chamber, the clearance cavity is also provided with a discharge port, and lubricating oil in the oil supply chamber and/or media in the pump body are discharged.
As a further technical scheme, an oil injection hole communicated with the oil chamber is formed in the outer wall of the pump head, and the height of the oil injection hole is higher than that of the friction surface of the mechanical seal, so that the height of oil in the oil chamber is higher than that of the friction surface of the mechanical seal.
As a further technical scheme, a mechanical seal mounting groove is formed in a pump head at the upper part of the oil chamber and used for placing the upper end face of the mechanical seal; and the pump cover is also provided with a mechanical seal mounting groove for placing the lower end face of the mechanical seal.
As a further technical scheme, set up the oil blanket mounting groove on the pump cover for embedding installation oil blanket skeleton, and the oil blanket mounting groove is located mechanical seal mounting groove below, and oil blanket skeleton and pump shaft rotation seal makes the oil chamber sealed with respect to the pump body inner chamber.
As a further technical scheme, a shaft sleeve is sleeved on the pump shaft extending into the pump body and used for positioning and mounting the impeller, and the shaft sleeve is in contact seal with the framework oil seal.
As a further technical scheme, be equipped with on the pump cover outer wall with the exhaust hole of pump body inner chamber intercommunication for the internal gas of discharge pump.
As a further technical scheme, a water drain hole communicated with the inner cavity of the pump body is formed in the outer wall of the pump body and used for discharging medium conveyed in the pump body.
The beneficial effects of the utility model are as follows:
1. an oil chamber is arranged above the pump cover, and a mechanical seal is arranged in the oil chamber, so that sewage conveyed in the pump body is separated from the mechanical seal, and the sewage is not in direct contact with the mechanical seal when the sewage pump works, so that the service life is prolonged, and water leakage is avoided;
2. the upper end face and the lower end face of the mechanical seal are completely immersed in lubricating oil, and the position of the oil injection hole is higher than the friction surface of the mechanical seal, so that the damage and water leakage caused by dry grinding of the dynamic and static rings of the mechanical seal are avoided;
3. a clearance cavity is arranged between the upper part of the pump head and the electrode flange, a discharge port is arranged in the clearance cavity, oil or sewage can be discharged, liquid conveyed after the mechanical seal is prevented from being damaged enters the motor, and the service life of the motor is prolonged.
Drawings
Fig. 1 is a schematic cross-sectional view of the present utility model.
Fig. 2 is an enlarged partial schematic view of the area a in fig. 1.
Fig. 3 is a schematic diagram of a front view structure of the present utility model.
Fig. 4 is a schematic top view of a pump head according to the present utility model.
Fig. 5 is a B-B cross-sectional view of fig. 4.
Fig. 6 is a schematic perspective view of a pump head according to the present utility model.
Fig. 7 is a schematic top view of a pump cover according to the present utility model.
Fig. 8 is a C-C cross-sectional view of fig. 7.
Reference numerals illustrate: the motor 1, the pump head 2, the mechanical seal 3, the screw plug 4, the pump body 5, the impeller 6, the shaft sleeve 7, the framework oil seal 8, the pump body O-shaped ring 9, the pump cover 10, the oil chamber O-shaped ring 11, the oil filling hole 12, the exhaust hole 13, the water discharging hole 14, the oil chamber 15, the clearance cavity 16, the exhaust port 17, the pump shaft 18, the oil seal mounting groove 19 and the mechanical seal mounting groove 20.
Detailed Description
The utility model will be described in detail below with reference to the attached drawings:
examples: as shown in fig. 1 to 8, the vertical pipeline sewage pump with the mechanical seal oil chamber comprises a motor 1, a pump head 2, a mechanical seal 3, a screw plug 4, a pump body 5, an impeller 6, a shaft sleeve 7, a framework oil seal 8, a pump body O-shaped ring 9, a pump cover 10, an oil chamber O-shaped ring 11, an oil filling hole 12, an exhaust hole 13, a water draining hole 14, an oil chamber 15, a clearance cavity 16, an exhaust hole 17, a pump shaft 18, an oil seal mounting groove 19 and a mechanical seal mounting groove 20.
Referring to fig. 1 and 2, a pump cover 10 is mounted on the upper opening of the pump body 5 through a threaded connection, and preferably, a pump body O-shaped ring 9 is mounted between the pump cover 10 and the pump body 5 to seal the pump body from sewage leakage in the pump body 5. The lower end face of the pump head 2 is fixedly arranged on the pump cover 10 through bolts, and the upper end face of the pump head 2 is fixedly connected with the flange of the motor 1 through bolts. The upper end of the pump shaft 18 is driven by the motor 1, the lower end of the pump shaft 18 sequentially penetrates through the pump head 2 and the pump cover 10 and stretches into the pump body 5 to be connected with and drive an impeller 6, and the impeller 6 is placed into the pump body 5 and positioned with the inner wall of the pump body 5.
Further, as shown in fig. 2 and 5, the inner wall of the lower part of the pump head 2 (i.e. the side close to the pump cover 10) is matched with the pump cover 10 to form an oil chamber 15, the oil chamber 15 is filled with lubricating oil (preferably, the pump head 2 and the pump cover 10 are sealed by an oil chamber O-ring 11 to prevent lubricating oil leakage), a mechanical seal 3 (preferably, a double-end mechanical seal) is sleeved on the outer wall of the pump shaft 18, and the mechanical seal 3 is placed in the oil chamber 15 and immersed in lubricating oil, so that the lower end of the mechanical seal 3 seals the oil chamber 15 relative to the inner cavity of the pump body 5, and the upper end of the mechanical seal 3 seals the oil chamber 15 relative to the motor.
Preferably, as shown in fig. 3 to 6, a mechanical seal mounting groove 20 is formed on the inner wall of the pump head 2 at the upper part of the oil chamber 15 for placing the upper end face of the mechanical seal 3; as shown in fig. 8, a mechanical seal mounting groove 20 is also provided at a corresponding position on the pump cover 10 for placing the lower end face of the mechanical seal 3. An oil filling hole 12 communicated with the oil chamber 15 is formed in the outer wall of the pump head 2, and the height of the oil filling hole 12 is higher than the friction surface of the mechanical seal 3 (namely, the position higher than the mechanical seal mounting groove 20), so that the height of oil in the oil chamber 15 is higher than the friction surface of the mechanical seal 3. Further, an oil seal mounting groove 19 is formed in the pump cover 10 and used for embedding and mounting the oil seal framework 8, the oil seal mounting groove 19 is located below the mechanical seal mounting groove 20, and the oil seal framework 8 and the pump shaft 18 are rotationally sealed, so that the oil chamber 15 is sealed relative to the inner cavity of the pump body 5. Preferably, referring to fig. 2, a shaft sleeve 7 is sleeved on a pump shaft 18 extending into the pump body 5 for positioning and mounting the impeller 6, and the shaft sleeve 7 is in contact seal with the framework oil seal 8.
As shown in fig. 4, 5 and 6, the inner wall of the upper part of the pump head 2 (i.e. the side close to the motor 1) is matched with the flange of the motor 1 to form a clearance cavity 16, the clearance cavity 16 is communicated with the oil chamber 15, two sides of the clearance cavity 16 are also provided with a discharge port 17, and when the mechanical seal 3 fails, lubricating oil in the oil chamber 15 and/or medium conveyed in the pump body 5 can be discharged outwards from the discharge port 17, so that the lubricating oil can be prevented from flowing into the motor 1, and the motor 1 is prevented from failing.
Preferably, referring to fig. 3 and 8, an exhaust hole 13 communicating with the inner cavity of the pump body 5 is provided on the outer wall of the pump cover 10 to exhaust the gas in the pump body 5. The outer wall of the pump body 5 is provided with a water drain hole 14 communicated with the inner cavity of the pump body 5 for discharging the medium conveyed in the pump body 5. As shown in fig. 1, holes are formed at the inlet and outlet of the pump body 5, and a screw plug 4 is installed.
The working process of the utility model comprises the following steps: according to the utility model, the pump head 2 is arranged between the motor 1 and the pump cover 10, the oil chamber 15 is arranged in the pump head 2, and the mechanical seal 3 sleeved on the pump shaft 18 is completely immersed in lubricating oil in the oil chamber 15, so that when the sewage pump operates, the upper end surface of the mechanical seal 3 is immersed in the lubricating oil, so that dry grinding of a friction surface of a dynamic ring and a static ring can be avoided, and the service life is prolonged; the lower part of the mechanical seal 3 is rotationally sealed with the shaft sleeve 7 (the pump shaft 18) through the oil seal framework 8, so that the separation of the sewage in the inner cavity of the pump body 5 and the mechanical seal 3 in the oil chamber 15 is realized, the sewage can not enter the oil chamber 15 when the pump runs, and the service life of the mechanical seal 3 is prolonged. In addition, when the mechanical seal 3 fails, sewage and oil can be discharged outwards from the clearance cavity 16 (the discharge port 17) above the oil chamber 15, so that the sewage and the oil can be prevented from entering the motor 1 to cause motor failure.
It should be understood that equivalents and modifications to the technical scheme and the inventive concept of the present utility model should fall within the scope of the claims appended hereto.
Claims (5)
1. A take vertical pipeline dredge pump of mechanical seal grease chamber, its characterized in that: the pump comprises a motor (1), a pump head (2), a pump body (5) and a pump shaft (18), wherein a pump cover (10) is arranged on the pump body (5), the lower end of the pump head (2) is fixed on the pump cover (10), the upper end of the pump head (2) is fixed with the motor (1), one end of the pump shaft (18) is connected and driven by the motor (1), and the other end of the pump shaft (18) sequentially penetrates through the pump head (2) and the pump cover (10) and stretches into the pump body (5) to be connected and drive an impeller (6); the inner wall of the pump head (2) close to one side of the pump cover (10) is matched with the pump cover (10) to form an oil chamber (15) for injecting lubricating oil, a mechanical seal (3) is sleeved on the outer wall of the pump shaft (18), the mechanical seal (3) is placed in the oil chamber (15) and immersed in the lubricating oil, the lower end of the mechanical seal (3) seals the inner cavity of the oil chamber (15) relative to the pump body (5), and the upper end of the mechanical seal (3) seals the oil chamber (15) relative to the motor;
the inner wall of the pump head (2) close to one side of the motor (1) is matched with a flange of the motor (1) to form a clearance cavity (16), the clearance cavity (16) is communicated with the oil chamber (15), a discharge port (17) is further formed in the clearance cavity (16), and lubricating oil in the oil supply chamber (15) and/or media in the pump body (5) are discharged;
an oil injection hole (12) communicated with the oil chamber (15) is formed in the outer wall of the pump head (2), and the height of the oil injection hole (12) is higher than the friction surface of the mechanical seal (3), so that the height of oil in the oil chamber (15) is higher than the friction surface of the mechanical seal (3);
the outer wall of the pump cover (10) is provided with an exhaust hole (13) communicated with the inner cavity of the pump body (5) and used for exhausting gas in the pump body (5).
2. The vertical pipe sewage pump with a mechanical seal oil chamber according to claim 1, characterized in that: a mechanical seal mounting groove (20) is formed in the pump head (2) at the upper part of the oil chamber (15) and is used for placing the upper end face of the mechanical seal (3); the pump cover (10) is also provided with a mechanical seal mounting groove (20) for placing the lower end face of the mechanical seal (3).
3. The vertical pipe sewage pump with a mechanical seal oil chamber according to claim 2, characterized in that: an oil seal mounting groove (19) is formed in the pump cover (10) and used for embedding and mounting the framework oil seal (8), the oil seal mounting groove (19) is located below the mechanical seal mounting groove (20), and the framework oil seal (8) and the pump shaft (18) are rotationally sealed, so that the oil chamber (15) is sealed relative to the inner cavity of the pump body (5).
4. A vertical pipe sewage pump with a mechanical seal oil chamber as claimed in claim 3, characterized in that: a shaft sleeve (7) is sleeved on a pump shaft (18) extending into the pump body (5) and used for positioning and installing the impeller (6), and the shaft sleeve (7) is in contact seal with the framework oil seal (8).
5. The vertical pipe sewage pump with a mechanical seal oil chamber according to any one of claims 1 to 4, characterized in that: the outer wall of the pump body (5) is provided with a water drain hole (14) communicated with the inner cavity of the pump body (5) for discharging medium conveyed in the pump body (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322084947.2U CN220687654U (en) | 2023-08-04 | 2023-08-04 | Vertical pipeline sewage pump with mechanical seal oil chamber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322084947.2U CN220687654U (en) | 2023-08-04 | 2023-08-04 | Vertical pipeline sewage pump with mechanical seal oil chamber |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220687654U true CN220687654U (en) | 2024-03-29 |
Family
ID=90370301
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322084947.2U Active CN220687654U (en) | 2023-08-04 | 2023-08-04 | Vertical pipeline sewage pump with mechanical seal oil chamber |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220687654U (en) |
-
2023
- 2023-08-04 CN CN202322084947.2U patent/CN220687654U/en active Active
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