CN202468436U - Dual-seal centrifugal pump - Google Patents
Dual-seal centrifugal pump Download PDFInfo
- Publication number
- CN202468436U CN202468436U CN2012200335143U CN201220033514U CN202468436U CN 202468436 U CN202468436 U CN 202468436U CN 2012200335143 U CN2012200335143 U CN 2012200335143U CN 201220033514 U CN201220033514 U CN 201220033514U CN 202468436 U CN202468436 U CN 202468436U
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- CN
- China
- Prior art keywords
- pump
- input shaft
- double
- seal
- pump housing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Abstract
The utility model relates to a dual-seal centrifugal pump suitable for conveying corrosive working medium without leaking. The device includes a pump body, wherein a pump shaft is arranged in the pump body. The dual-seal centrifugal pump is characterized in that an input shaft is connected with the pump shaft; the input shaft is sleeved with a sealing sleeve; one end of the sealing sleeve is hermetically connected with the pump body; a packing seal structure is arranged between the other end of the sealing sleeve and the input shaft; and a spiral groove forming a spiral seal structure is also arranged on the input shaft between the pump body and the packing seal structure. The dual-seal centrifugal pump adopts the seal structure that the spiral seal is combined with the packing seal, thereby improving the sealing effect and prolonging the service life of seal; the adopted detachable and replaceable modularized connection design enables the installation, replacement and maintenance of the pump body to be more convenient.
Description
Technical field
The utility model relates to a kind of pump, and particularly a kind of centrifugal pump with double sealing structure is suitable for not having the conveying of the ground of leakage and has corrosive working medium.
Background technique
Centrifugal pump is primary in design, and what pay attention to is exactly sealing problem, and especially working medium has corrosive the time, and the quality of sealing effect will directly determine pump performance.
One of emphasis of pump seal is the sealing of axle, and sealing means divides contact-type sealing and noncontact seal (motive sealing).Common contact seal is such as packing seal; Be that packing_seal material with rope form is wrapped on pump shaft or the axle sleeve to reach sealing effect, though this sealing means is comparatively simple, because be direct contact round and round; So and the wearing and tearing between the pump structure are very big; Especially working medium has corrosive the time, and filler is short working life, and leakage problem takes place easily.Common motive sealing has various ways, and wherein, through on axle, adding spiral, the form that the pumping effect of helix structure is accomplished sealing when utilizing pump shaft to rotate is called spiral seal.Spiral seal only could realize sealing preferably when pump shaft reaches certain rotating speed, the sealing effect when pump stops the perhaps slow-speed of revolution is unsatisfactory.
Common centrifugal pump can be divided on the structure vertical and horizontal.The pump shaft of vertical pump is longer, and under powerful running, device need bear bigger disturbance; The stability of horizontal pump better, but its member mostly is immersed in the working medium, therefore also should be noted that the problem of pump unit replacement and maintenance.
Summary of the invention
The purpose of the utility model is that in the existing pump seal mode, the contact seal filler is short working life, and the sealing effect unfavorable problem of noncontact seal when pump stops the perhaps slow-speed of revolution provides a kind of centrifugal pump with double sealing structure.
Another purpose of the utility model is to provide a kind of horizontal centrifugal pump package assembly that is easy to change.
The utility model solves the technological scheme that its technical problem adopted: a kind of double-sealing centrifugal pump; Comprise the pump housing, be provided with pump shaft in the pump housing, pump shaft is connected with input shaft; Input shaft is arranged with Sealed casing pipe outward; Sealed casing pipe one end and the pump housing are tightly connected, and are provided with packing seal structure between the other end and the input shaft, also are provided with spiral chute on the input shaft between the said pump housing and the packing seal structure and form the spiral seal structure.Pump stops or during the slow-speed of revolution, packing seal structure seals, and prevents refrigerant leakage, and during high rotating speed, the spiral seal structure plays main seal action in pump runs to, and reduces working medium and contacts with filler, raising filler working life.
As preferably, said spiral seal structure comprises two sections spiral chute sections in the opposite direction, forms closed cavity between the two spiral chute sections, closed cavity and pump housing internal communication.The pump action of two spiral chute sections is to the pumping of intermediate seal inner chamber; Reduce the working medium of other positions in the Sealed casing pipe; And through closed cavity and inner being communicated with of the pump housing, the pump discharge of final spiral seal section and the flow of importing from pump housing inside reach balance, realize sealing.Closed cavity can be connected through connecting tube with pump housing inside.
As preferably, said packing seal structure comprises the filler cover that is connected on the input shaft, and filler cover outer felt is wound with filler, and the outer end of filler is provided with the annular gland along the input shaft axial motion.The annular gland can push filler makes the filler tight seal.
As preferably, said annular gland is connected with the hold-down mechanism that receives the control of pump shaft rotating speed.Hold-down mechanism can be realized compressing or unclamping according to the pump shaft rotating speed, and when the pump shaft rotating speed was high, hold-down mechanism unclamped, and annular gland reduces filling pressure, reduces the friction between filler and input shaft and the Sealed casing pipe, improves working life; When pump stopped the perhaps slow-speed of revolution, hold-down mechanism compressed, and annular gland increases filling pressure, improves sealability.Said hold-down mechanism can be the electromagnetic controller of band rotating speed induction.
As preferably, said filler cover outer side surface is the small end conical surface outwardly.
As preferably, the said pump housing is the horizontal pump housing.
As preferably, the said Sealed casing pipe and the pump housing adopt bolt, and said input shaft is connected with pump shaft employing spline.Adopt dismountable connection between sealing configuration and the pump body structure, be convenient to change.
As preferably, the outer end of input shaft connects motor, and motor links to each other through coupling with input shaft.Motor and sealing configuration also adopt and removably connect, and are convenient to change.
The sealing configuration that the utility model adopts spiral seal and packing seal to combine improves sealing effect, increases sealing life; And adopted disconnectable modularization to connect design, make installation, replacing and the maintenance of pump more convenient.
Description of drawings
Fig. 1 is a kind of structural representation of the utility model.
Fig. 2 is the sectional view of the utility model pump housing and sealing configuration.
Among the figure: 1. the pump housing, 2. Sealed casing pipe, 3. coupling, 4. motor, 5. bonnet, 6. pump shaft, 7. connecting tube, 8. outlet, 9. import, 10. spiral chute section, 11. closed cavities, 12. filler covers, 13. fillers, 14. annular glands, 15. hold-down mechanisms, 16. input shafts.
Embodiment
Below through specific embodiment and combine accompanying drawing that the utility model is further specified.
Embodiment: a kind of double-sealing centrifugal pump, like Fig. 1, shown in Figure 2.This device comprises the horizontal pump housing 1, seal section and the motor 4 that removably connects each other.The pump housing 1 axis is provided with pump shaft 6; On the pump housing 1 inwall stator is installed, blade is installed on the pump shaft, the left end of the pump housing 1 is for adopting bolted bonnet 5; Bonnet 5 adopts the structure of hemisphere type; Can bear bigger internal pressure, the bonnet and the pump housing are tightly connected, and can unload at any time and maintain easily or change the pump inner body.The right-hand member of the pump housing 1 is an input end, links to each other with seal section.The two ends of the pump housing 1 side are respectively equipped with the inlet 9 and outlet 8 of pumping, and 9 one sides that enter the mouth are near seal section.
Seal section comprises the Sealed casing pipe 2 that input shaft 16 is outer with being set in input shaft, and Sealed casing pipe 2 left ends are installed on the pump housing 1 through flange seal, and the inner of input shaft 16 and pump shaft 6 are connected through spline.The right-hand member inboard of Sealed casing pipe 2 is provided with packing seal structure; Comprise the filler cover 12 that is socketed on the input shaft 16, the outer side surface of filler cover 12 is the conical surface of small end towards the right side, and the outer felt of filler cover 12 is around filler 13; The right-hand member of filler 13 is provided with annular gland 14, and annular gland links to each other with hold-down mechanism 15.Input shaft between packing seal structure and the body is provided with two spiral chute sections 10; Two spiral chute sections 10 are in the opposite direction and simultaneously to pumping between the two; Form closed cavity 11 between two spiral chute sections 10, closed cavity 11 is communicated with through connecting tube 7 with the pump housing 1.The right-hand member of input shaft 16 links to each other with motor 4 through coupling 3.
Hold-down mechanism 15 is through the control of pump shaft 6 rotating speeds, and when pump shaft 6 rotating speeds are lower than setting value, hold-down mechanism 15 provides impacting force, is that annular gland 14 compresses filler, makes filler 13 closely fill the spaces between input shafts 16 and the Sealed casing pipe 2, avoids seepage; When pump shaft 6 rotating speeds are higher than setting value, hold-down mechanism 15 unclamps, and utilizes the sealing of spiral seal section, reduces the friction of filler 13 and input shaft 16 and Sealed casing pipe 2, improves working life.High rotating speed in pump shaft 6 is in, spiral chute section 10 with the working medium in the Sealed casing pipe 2 to closed cavity 11 pumpings and send back in the pump housing 1.
The manufacturing of the whole employing of device resistant material to different situations the time, can be done different surface treatment method to material again.
Claims (8)
1. double-sealing centrifugal pump; Comprise the pump housing, be provided with pump shaft in the pump housing, it is characterized in that: pump shaft is connected with input shaft; Input shaft is arranged with Sealed casing pipe outward; Sealed casing pipe one end and the pump housing are tightly connected, and are provided with packing seal structure between the other end and the input shaft, also are provided with spiral chute on the input shaft between the said pump housing and the packing seal structure and form the spiral seal structure.
2. a kind of double-sealing centrifugal pump according to claim 1 is characterized in that: said spiral seal structure comprises two sections spiral chute sections in the opposite direction, forms closed cavity between the two spiral chute sections, closed cavity and pump housing internal communication.
3. a kind of double-sealing centrifugal pump according to claim 1 and 2 is characterized in that: said packing seal structure comprises the filler cover that is connected on the input shaft, and filler cover outer felt is wound with filler, and the outer end of filler is provided with the annular gland along the input shaft axial motion.
4. a kind of double-sealing centrifugal pump according to claim 3 is characterized in that: said annular gland is connected with the hold-down mechanism that receives the control of pump shaft rotating speed.
5. a kind of double-sealing centrifugal pump according to claim 3 is characterized in that: said filler cover outer side surface is the small end conical surface outwardly.
6. a kind of double-sealing centrifugal pump according to claim 1 is characterized in that: the said pump housing is the horizontal pump housing.
7. according to claim 1 or 2 or 6 described a kind of double-sealing centrifugal pumps, it is characterized in that: the said Sealed casing pipe and the pump housing adopt bolt, and said input shaft adopts spline to be connected with pump shaft.
8. according to claim 1 or 2 or 6 described a kind of double-sealing centrifugal pumps, it is characterized in that: the outer end of input shaft connects motor, and motor links to each other through coupling with input shaft.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200335143U CN202468436U (en) | 2012-02-03 | 2012-02-03 | Dual-seal centrifugal pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200335143U CN202468436U (en) | 2012-02-03 | 2012-02-03 | Dual-seal centrifugal pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202468436U true CN202468436U (en) | 2012-10-03 |
Family
ID=46916596
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012200335143U Expired - Lifetime CN202468436U (en) | 2012-02-03 | 2012-02-03 | Dual-seal centrifugal pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202468436U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108930792A (en) * | 2018-07-20 | 2018-12-04 | 重庆众泰新能源汽车技术研究院有限公司 | The spiral combined sealing structure of motor in electric automobile shaft |
-
2012
- 2012-02-03 CN CN2012200335143U patent/CN202468436U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108930792A (en) * | 2018-07-20 | 2018-12-04 | 重庆众泰新能源汽车技术研究院有限公司 | The spiral combined sealing structure of motor in electric automobile shaft |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20121003 |
|
| CX01 | Expiry of patent term |