CN217080867U - Submersible pump with novel mechanical seal arrangement structure - Google Patents
Submersible pump with novel mechanical seal arrangement structure Download PDFInfo
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- CN217080867U CN217080867U CN202220926408.1U CN202220926408U CN217080867U CN 217080867 U CN217080867 U CN 217080867U CN 202220926408 U CN202220926408 U CN 202220926408U CN 217080867 U CN217080867 U CN 217080867U
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Abstract
The submersible pump with the novel mechanical seal arrangement structure comprises a motor shaft, a motor end cover and an oil chamber cover, wherein an oil isolation chamber is formed between the oil chamber cover and the motor end cover, the motor shaft penetrates through the motor end cover and the oil chamber cover, and a mechanical seal A, B is mounted on the motor shaft; the static ring A is arranged in a static ring groove A of the motor end cover, and the dynamic ring A and the motor shaft form sealing; a spring and a shaft sleeve are further mounted on the motor shaft, one end of the spring abuts against the end face of the movable ring A, the other end of the spring abuts against the end face of one end of the shaft sleeve, and the end face of the other end of the shaft sleeve is fixed on a hub of the impeller; the static ring B is arranged in a static ring groove B of the oil chamber cover; a rubber corrugated pipe for sealing and positioning is arranged between the moving ring B and the shaft sleeve, the inner diameter of the static ring B is larger than the outer diameter of the moving ring A, and the upper end face of the static ring B is positioned on the lower end face of the moving ring A. The utility model discloses a immersible pump has that liquid seal pressure is big, axial dimensions is short, small, the reliability is high and easily install and the advantage of maintenance.
Description
Technical Field
The utility model relates to a immersible pump technique, concretely relates to immersible pump with new-type machine seals arrangement structure.
Background
At present, two sets of sealing structures which are matched with an oil separation chamber and are used for sealing a motor and a water pump of a submersible pump are often adopted between the motor and the water pump, so that water is prevented from entering the motor, as shown in a patent with the publication number of CN 214063310U; the arrangement design between two sets of mechanical seals is generally divided into two types: 1) back-to-back double end-face seal arrangement; 2) the independent machine seals are arranged in series. The back-to-back double-end-face sealing arrangement has the advantages of short axial dimension and simple structure; however, the sealing pressure is low, the running states of two sealing surfaces are mutually interfered, one sealing surface is in a problem, the other sealing surface is in a problem, and the defect of low sealing reliability exists. The independent machine seals are arranged in series, so that the sealing pressure is high, and the reliability is high; but also has the defects of long axial dimension and the need of slotting the shaft; the shaft elongation causes low shaft rigidity, large impeller shaking, serious wear of a mouth ring and frequent replacement of parts; meanwhile, the shaft slotting also causes inconvenience in installation and maintenance.
SUMMERY OF THE UTILITY MODEL
To prior art's weak point, the utility model provides a immersible pump with new-type machine seals arrangement structure, the utility model discloses a immersible pump has that liquid seal pressure is big, axial dimension is short, small, the reliability is high and easily install and the advantage of maintenance.
The utility model discloses technical scheme as follows:
the submersible pump with the novel mechanical seal arrangement structure comprises a motor shaft, a motor end cover and an oil chamber cover, wherein the oil chamber cover is installed on the motor end cover, an oil isolation chamber is formed between the oil chamber cover and the motor end cover, the motor shaft penetrates through the motor end cover and the oil chamber cover, and a mechanical seal A and a mechanical seal B are installed on the motor shaft; the mechanical seal A comprises a static ring A and a dynamic ring A, and the mechanical seal B comprises a static ring B and a dynamic ring B; the static ring A is arranged in a static ring groove A of the motor end cover, and the dynamic ring A and the motor shaft form sealing; the motor shaft is also provided with a spring and a shaft sleeve, one end of the spring is abutted against the end face of the movable ring A, the spring is used for providing motion compensation and transmitting rotation torque for the movable ring A, the other end of the spring is abutted against the end face of one end of the shaft sleeve, and the end face of the other end of the shaft sleeve is fixed on a hub of the impeller; the static ring B is arranged in a static ring groove B of the oil chamber cover, and the outer ring surface of the shaft sleeve is positioned in the inner ring surface of the dynamic ring B; a rubber corrugated pipe for sealing and positioning is arranged between the movable ring B and the shaft sleeve, one end of the rubber corrugated pipe is in contact with the end face of the movable ring B to form sealing, and the other end of the rubber corrugated pipe is in contact with the limiting end face on the shaft sleeve to form sealing; the inner diameter of the static ring B is larger than the outer diameter of the dynamic ring A, and the upper end face of the static ring B is positioned on the lower end face of the dynamic ring A.
The utility model provides a immersible pump with new-type machine seals arrangement structure has that liquid seal pressure is big, axial dimensions is short, small, the reliability is high and easily the advantage of installation and maintenance, and the concrete appearance does: the utility model provides a two sets of mechanical seal form series arrangement, belong to built-in installation, liquid seal pressure is higher than the sealing pressure when back to back double-end face seal arranges to mechanical seal is in from tight mode of operation during operation, and mechanical seal's sealed face pressure can rise along with liquid seal pressure rises and synchronous rising, thereby guarantees sealed reliability; simultaneously, because in the mechanical seal arrangement structure in the utility model, with the help of the effect of axle sleeve, make mechanical seal A stagger with mechanical seal B's axial mounted position, there is overlap portion two sets of mechanical seal's axial size to axial length size not only is less than the independent mechanical seal series arrangement among the prior art, but also is less than back to back double-end face seal arrangement, thereby the length of motor shaft also shortens along with it, and the axial size of motor is littleer, has reduced the volume of immersible pump; in addition, compared with the existing independent mechanical seal series arrangement, the axial length of the mechanical seal in the mechanical seal arrangement structure of the submersible pump is shortened, so that the length of a motor shaft is shortened, the problems of low shaft rigidity, large impeller shaking and serious abrasion caused by the extension of the motor shaft are solved, and the reliability is further improved; finally, because the two sets of mechanical seals are axially positioned through the shaft sleeves, a groove for positioning the mechanical seals is not needed on a motor shaft, and the mechanical seals are easy to install and maintain.
Preferably, in the submersible pump with the novel mechanical seal arrangement structure, the lubricating oil in the oil isolation chamber occupies more than 90% of the space. The existence of lubricating oil can cool and lubricate the mechanical seal, and can play an isolation effect between the pump and the motor.
Preferably, in the submersible pump with the novel mechanical seal arrangement structure, an O-shaped sealing ring is arranged between the rotating ring a and the motor shaft, and an O-shaped sealing ring is arranged between the shaft sleeve and the motor shaft. After the movable ring A, the shaft sleeve and the motor shaft are sealed by the O-shaped sealing ring, static seal can be formed among the movable ring A, the shaft sleeve and the motor shaft.
Preferably, in the submersible pump with the novel mechanical seal arrangement structure, an O-shaped sealing ring or a sealing leather cup is arranged between the static ring A and the motor end cover. After the static ring A and the motor end cover are sealed by adopting an O-shaped sealing ring or a sealing leather cup, static sealing can be formed between the static ring A and the motor end cover.
Preferably, in the submersible pump with the novel mechanical seal arrangement structure, an O-shaped sealing ring or a sealing leather cup is arranged between the static ring B and the oil chamber cover. After the static ring B and the oil chamber cover are sealed by adopting an O-shaped sealing ring or a sealing leather cup, static sealing can be formed between the static ring B and the oil chamber cover. Furthermore, a rubber cup is arranged between the static ring B and the oil chamber cover, the rubber cup is arranged in a static ring groove B of the oil chamber cover, and the static ring B is arranged in the rubber cup. The contact area of the rubber leather cup is large, the rubber leather cup is adopted for sealing between the static ring B and the oil chamber cover, and the sealing effect can be fully guaranteed.
Preferably, in the submersible pump with the novel mechanical seal arrangement structure, the shaft sleeve and the hub end face of the impeller are respectively provided with two insertion holes, cylindrical pins are installed in the insertion holes, and the shaft sleeve is fixed on the hub end face of the impeller through the two cylindrical pins. The axle sleeve is fixed back on the wheel hub terminal surface of impeller through two cylindric locks to the impeller can drive the axle sleeve and rotate, drives mechanical seal A and mechanical seal B rotation then.
Preferably, in the submersible pump with the novel mechanical seal arrangement structure, the shaft sleeve is made of a casting or stainless steel sheet rolled piece. The cast or stainless steel sheet roller has low production cost.
Preferably, in the submersible pump with the novel mechanical seal arrangement structure, the impeller of the submersible pump adopts a double-suction impeller. The double-suction impeller has large flow, high working efficiency and stable operation in the working process.
Drawings
Fig. 1 is a schematic structural view of a submersible pump with a novel mechanical seal arrangement structure according to the present invention;
FIG. 2 is an enlarged view taken within circle A of FIG. 1;
the labels in the figures are: 1-motor shaft; 2-motor end cover, 201-static ring groove A; 3-oil chamber cover, 301-stationary ring groove B; 4-an oil isolation chamber; 5-mechanical seal A, 501-static ring A and 502-dynamic ring A; 6-mechanical seal B, 601-static ring B, 602-dynamic ring B; 7-a spring; 8-shaft sleeve and 801-limit end surface; 9-an impeller; 10-rubber bellows; 11-rubber leather cup; 12-a motor housing; 13-cylindrical pin.
Detailed Description
The present invention will be further described with reference to the following drawings and detailed description (including examples), but not intended as a basis for limiting the invention.
Referring to fig. 1-2, the submersible pump with a novel mechanical seal arrangement structure of the present invention includes a motor shaft 1, a motor end cover 2 and an oil chamber cover 3, wherein the oil chamber cover 3 is installed on the motor end cover 2, an oil isolation chamber 4 is formed between the oil chamber cover 3 and the motor end cover 2, the motor shaft 1 passes through the motor end cover 2 and the oil chamber cover 3, and a mechanical seal a5 and a mechanical seal B6 are installed on the motor shaft 1; the mechanical seal A5 comprises a static ring A501 and a dynamic ring A502, and the mechanical seal B6 comprises a static ring B601 and a dynamic ring B602; the static ring A501 is arranged in a static ring groove A201 of the motor end cover 2, and the dynamic ring A502 and the motor shaft 1 form a seal; the motor shaft 1 is also provided with a spring 7 and a shaft sleeve 8, one end of the spring 7 abuts against the end face of the movable ring A502, the other end of the spring 7 abuts against the end face of one end of the shaft sleeve 8, and the end face of the other end of the shaft sleeve 8 is fixed on a hub of the impeller 9; the static ring B601 is arranged in a static ring groove B301 of the oil chamber cover 3, and the outer annular surface of the shaft sleeve 8 is positioned in the inner annular surface of the movable ring B602; a rubber corrugated pipe 10 for sealing and positioning is arranged between the movable ring B602 and the shaft sleeve 8, one end of the rubber corrugated pipe 10 is in contact with the end face of the movable ring B602 to form sealing, and the other end of the rubber corrugated pipe 10 is in contact with the limiting end face 801 on the shaft sleeve 8 to form sealing; the inner diameter of the static ring B601 is larger than the outer diameter of the dynamic ring A502, and the upper end face of the static ring B601 is positioned above the lower end face of the dynamic ring A502.
In the working process, the two sets of mechanical seals are arranged in series, and the shaft sleeve 8 is fixed on the hub of the impeller 9; because one end of the spring 7 is abutted against the end face of the moving ring A502, the other end of the spring 7 is abutted against the end face of one end of the shaft sleeve 8, and the mechanical seal A5 is fixed in the static ring groove A201, in the process that the impeller 9 drives the shaft sleeve 8 to rotate, the spring 7 can provide motion compensation and transmit rotation torque for the moving ring A502, so that the moving ring A502 rotates relative to the static ring A501. Meanwhile, as the moving ring B602 and the shaft sleeve 8 are sealed and positioned through the rubber bellows 10, the mechanical seal B6 can be fixed in the stationary ring groove B301, so that the moving ring B602 rotates relative to the stationary ring B601 in the process that the impeller 9 drives the shaft sleeve 8 to rotate. In the whole working process, the mechanical seal B6 forms a first seal to prevent water conveyed by the pump from entering the oil isolation chamber 4; the oil isolation chamber 4 forms a buffer area which can lubricate and cool the mechanical seal and can absorb a small amount of water leaked from the first seal; the mechanical seal a5 forms a second seal to prevent oil or oil-water mixture from entering the motor cavity.
The sealing arrangement structure of the submersible pump of the utility model has the advantages that the liquid sealing pressure can reach 1.0MPa which is higher than 0.2-0.25MPa when back-to-back double end faces are arranged in a sealing way; compare in current independent machine seal series arrangement, the utility model discloses among the submersible pump's the sealed arrangement structure, motor shaft 1 diameter is 20-40 mm's within range, and motor shaft 1's axial dimension can shorten 15-16%.
Example (b):
in this embodiment, the lubricating oil occupies 95% of the space in the oil isolation chamber 4. The existence of lubricating oil can cool and lubricate the mechanical seal, and can play an isolation effect between the pump and the motor.
In this embodiment, an O-ring is disposed between the rotating ring a502 and the motor shaft 1, and an O-ring is disposed between the sleeve 8 and the motor shaft 1. After the movable ring A502, the shaft sleeve 8 and the motor shaft 1 are sealed by adopting O-shaped sealing rings, static seal can be formed among the movable ring A502, the shaft sleeve 8 and the motor shaft 1.
In this embodiment, an O-ring is disposed between the stationary ring a501 and the motor end cover 2. After the static ring A501 and the motor end cover 2 are sealed by adopting an O-shaped sealing ring, static seal can be formed between the static ring A501 and the motor end cover 2.
In the present embodiment, a rubber cup 11 is disposed between the stationary ring B601 and the oil chamber cover 3, the rubber cup 11 is installed in the stationary ring groove B301 of the oil chamber cover 3, and the stationary ring B601 is installed in the rubber cup 11. After the static ring B601 and the oil chamber cover 3 are sealed by the rubber cup 11, static seal can be formed between the static ring B601 and the oil chamber cover 3, the contact area of the rubber cup 11 is large, and the sealing effect can be fully ensured.
In this embodiment, two insertion holes are respectively formed in the hub end surfaces of the shaft sleeve 8 and the impeller 9, cylindrical pins 13 are installed in the insertion holes, and the shaft sleeve 8 is fixed on the hub end surface of the impeller 9 through the two cylindrical pins 13. The shaft sleeve 8 is fixed on the hub end face of the impeller 9 through two cylindrical pins 13, so that the impeller 9 can drive the shaft sleeve 8 to rotate, and then the mechanical seal A5 and the mechanical seal B6 are driven to rotate.
In the embodiment, the shaft sleeve 8 is made of stainless steel sheet rolled parts, and the production cost of the stainless steel sheet rolled parts is low; furthermore, the impeller 9 of the submersible pump adopts a double-suction impeller, the flow of the double-suction impeller is large, the working efficiency is high, and the operation is stable in the working process.
The above description of "up" and "down" referred to in the present application is relative to the orientation of fig. 1, and should not be construed as limiting the technical solution of the present invention.
The above general description of the invention and the description of its specific embodiments in this application should not be construed as limiting the scope of the invention. Those skilled in the art can add, reduce or combine the technical features disclosed in the general description and/or the specific embodiments (including the examples) to form other technical solutions within the scope of the present application according to the disclosure of the present application without departing from the components of the present invention.
Claims (9)
1. Submersible pump with novel mechanical seal arrangement structure ， It is characterized in that ： The motor comprises a motor shaft (1), a motor end cover (2) and an oil chamber cover (3), wherein the oil chamber cover (3) is installed on the motor end cover (2), an oil isolation chamber (4) is formed between the oil chamber cover (3) and the motor end cover (2), the motor shaft (1) penetrates through the motor end cover (2) and the oil chamber cover (3), and a mechanical seal A (5) and a mechanical seal B (6) are installed on the motor shaft (1); the mechanical seal A (5) comprises a static ring A (501) and a dynamic ring A (502), and the mechanical seal B (6) comprises a static ring B (601) and a dynamic ring B (602); the static ring A (501) is arranged in a static ring groove A (201) of the motor end cover (2), and the dynamic ring A (502) and the motor shaft (1) form sealing; a spring (7) and a shaft sleeve (8) are further mounted on the motor shaft (1), one end of the spring (7) abuts against the end face of the movable ring A (502), the other end of the spring (7) abuts against the end face of one end of the shaft sleeve (8), and the end face of the other end of the shaft sleeve (8) is fixed on a hub of the impeller (9); the static ring B (601) is arranged in a static ring groove B (301) of the oil chamber cover (3), and the outer ring surface of the shaft sleeve (8) is positioned in the inner ring surface of the movable ring B (602); a rubber corrugated pipe (10) for sealing and positioning is arranged between the movable ring B (602) and the shaft sleeve (8), one end of the rubber corrugated pipe (10) is in contact with the end face of the movable ring B (602) to form sealing, and the other end of the rubber corrugated pipe (10) is connected with the shaftThe limiting end faces (801) on the sleeve (8) are contacted and sealed; the inner diameter of the static ring B (601) is larger than the outer diameter of the dynamic ring A (502), and the upper end face of the static ring B (601) is positioned on the lower end face of the dynamic ring A (502).
2. The submersible pump with novel mechanical seal arrangement of claim 1, wherein: the lubricating oil in the oil isolation chamber (4) occupies more than 90 percent of the space.
3. The submersible pump with novel mechanical seal arrangement of claim 1, wherein: an O-shaped sealing ring is arranged between the moving ring A (502) and the motor shaft (1), and an O-shaped sealing ring is arranged between the shaft sleeve (8) and the motor shaft (1).
4. The submersible pump with novel mechanical seal arrangement of claim 1, wherein: an O-shaped sealing ring or a sealing leather cup is arranged between the static ring A (501) and the motor end cover (2).
5. The submersible pump with novel mechanical seal arrangement of claim 1, wherein: an O-shaped sealing ring or a sealing leather cup is arranged between the static ring B (601) and the oil chamber cover (3).
6. The submersible pump with novel mechanical seal arrangement of claim 5, wherein: be equipped with rubber leather cup (11) between quiet ring B (601) and oil chamber lid (3), install in quiet ring groove B (301) of oil chamber lid (3) rubber leather cup (11), install in rubber leather cup (11) quiet ring B (601).
7. The submersible pump with novel mechanical seal arrangement of claim 1, wherein: the impeller is characterized in that two jacks are respectively arranged on the hub end faces of the shaft sleeve (8) and the impeller (9), cylindrical pins (13) are installed in the jacks, and the shaft sleeve (8) is fixed on the hub end face of the impeller (9) through the two cylindrical pins (13).
8. The submersible pump with novel mechanical seal arrangement of claim 1, wherein: the shaft sleeve (8) is made of a casting or stainless steel sheet rolling piece.
9. The submersible pump with novel mechanical seal arrangement of claim 1, wherein: the impeller (9) of the submersible pump adopts a double-suction impeller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220926408.1U CN217080867U (en) | 2022-04-20 | 2022-04-20 | Submersible pump with novel mechanical seal arrangement structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220926408.1U CN217080867U (en) | 2022-04-20 | 2022-04-20 | Submersible pump with novel mechanical seal arrangement structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217080867U true CN217080867U (en) | 2022-07-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220926408.1U Active CN217080867U (en) | 2022-04-20 | 2022-04-20 | Submersible pump with novel mechanical seal arrangement structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217080867U (en) |
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2022
- 2022-04-20 CN CN202220926408.1U patent/CN217080867U/en active Active
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