CN202381384U - Mechanical sealing device for plastic pump - Google Patents
Mechanical sealing device for plastic pump Download PDFInfo
- Publication number
- CN202381384U CN202381384U CN2011205121432U CN201120512143U CN202381384U CN 202381384 U CN202381384 U CN 202381384U CN 2011205121432 U CN2011205121432 U CN 2011205121432U CN 201120512143 U CN201120512143 U CN 201120512143U CN 202381384 U CN202381384 U CN 202381384U
- Authority
- CN
- China
- Prior art keywords
- floating seal
- ring
- seal
- shaped ring
- floating
- 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 - Fee Related
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- Mechanical Sealing (AREA)
Abstract
The utility model discloses a mechanical sealing device for a plastic pump. The mechanical sealing device comprises a shaft sleeve, a moving ring sleeved on the shaft sleeve, a static ring which is tightly attached to the moving ring, springs, spring seats and a floating seal O-shaped ring, wherein a floating seal O-shaped ring seat is arranged outside the floating seal O-shaped ring and is pressed on a pump cover sealing cavity by using an L-shaped gasket. The O-shaped ring seat made of a ceramic material is arranged outside the floating seal O-shaped ring and is pressed on the pump cover sealing cavity by using a corrosion-resistant rubber L-shaped gasket. By the structure, the compression amount of the floating seal O-shaped ring is prevented from changing due to a high engineering plastic thermal expansion coefficient of the pump cover, so that the sealing property and floating property of the floating seal O-shaped ring are ensured; and therefore, the mechanical sealing performance is improved, and a sealing effect of the plastic pump is guaranteed.
Description
Technical field
The utility model relates to the mechanical seal field, specifically is that a kind of plastic pump is used mechanical seal device.
Background technique
Mechanical seal device is because simple in structure, reliable performance, and long service life, anti-corrosion capacity is strong, wear-resisting etc., and advantage has obtained using widely on the corrosion resistant engineering plastic pump.Its structure is made up of axle sleeve, rotating ring, stationary ring, spring, spring seat, floating seal O shape circle etc., and wherein stationary ring is contained in the groove of pump cover Seal cage with floating seal O shape circle.Floating seal O shape circle is that the cross section is circular rubber ring in the existing technology, has better elastic, decay resistance.Floating seal O shape circle is supporting with stationary ring, and the certain deformation amount is arranged after assembling, because floating seal O shape encloses sealing and floating action, its decrement is had relatively high expectations.If too the pine dielectric leakage; Too tight amazing floating action makes spring can't keep the face pressure on stationary ring and the rotating ring rubbing surface, also causes seal failure.Sealing O shape circle groove on the plastic pump; Add and be difficult to measure its internal diameter size man-hour; More unmanageable is that the plastics linear expansion coeffcient that expands with heat and contract with cold is big, and the size of plastics wall thickness and processing, the temperature difference of using, the temperature variation of medium all are the variablees that is difficult to confirm.Therefore, this machine envelope causes the inefficacy of machine envelope because the decrement of this floating seal O shape circle is difficult to control.
The model utility content
The utility model technical problem to be solved provides a kind of dimensionally stable, sealing and floating action, and good plastic pump is used mechanical seal device.
For the technical problem that solves the utility model adopts following technological scheme:
A kind of plastic pump is used mechanical seal device; Comprise axle sleeve, be socketed in the rotating ring on the axle sleeve; The stationary ring, spring, spring seat, the floating seal O shape that fit tightly with rotating ring are enclosed; Said floating seal O shape circle outer installment one floating seal O shape ring support, said floating seal O shape ring support is pressed on the pump cover Seal cage with the L packing ring.
Said O shape ring support is a ceramic material, and said L packing ring is a corrosion resistant rubber material.
The utility model is employed in the O shape ring support of floating seal O shape circle outer installment ceramic material, is pressed on the pump cover Seal cage with corrosion resistant rubber L packing ring then.This structure has guaranteed the variation that the decrement of floating seal O shape circle can not cause greatly because of the engineering plastics thermal expansion coefficient of pump cover; Thereby the sealing and the floatability requirement of floating seal O shape circle have been guaranteed; This mechanical sealing performance is improved, guaranteed the sealing effect of plastic pump.
Description of drawings
Fig. 1 is the utility model structural representation;
Fig. 2 is a floating seal O shape ring support structural representation;
Among the figure: 1-axle sleeve 2-rotating ring 3-stationary ring 4-spring 5-spring seat 7-floating seal O shape circle 9-floating seal O shape ring support 10-L packing ring.
Embodiment
Below in conjunction with accompanying drawing the utility model is done further detailed description:
Like Fig. 1, shown in Figure 2; A kind of plastic pump is used mechanical seal device; Comprise axle sleeve 1, be socketed on the axle sleeve 1 and the rotating ring 2 of axial limiting on axle sleeve 1; And the spring 4 between stationary ring 3, pump cover and the stationary ring that rotating ring 2 fits tightly, spring seat 5, floating seal O shape circle 7, stationary ring 3 is pressed on the end face of rotating ring 2 through spring 4.The floating seal O shape of mechanical seal device is enclosed the floating seal O shape ring support 9 of 7 outer installment ceramic materials, and floating seal O shape ring support 9 usefulness corrosion resistant rubber L packing rings 10 are pressed on the pump cover Seal cage position then.This structure has guaranteed that the decrement of floating seal O shape circle 7 is reasonable, stable, thereby has guaranteed the sealing and the floatability requirement of this floating seal O shape circle 7, and this mechanical sealing performance is improved, thereby has guaranteed the sealability of plastic pump.
Claims (2)
1. a plastic pump is used mechanical seal device; The stationary ring, spring, spring seat, the floating seal O shape circle that comprise axle sleeve, be socketed in rotating ring on the axle sleeve, fit tightly with rotating ring; It is characterized in that: said floating seal O shape circle (7) outer installment one floating seal O shape ring support (9), said floating seal O shape ring support (9) is pressed on the pump cover Seal cage with L packing ring (10).
2. a kind of plastic pump according to claim 1 is used mechanical seal device, it is characterized in that: said floating seal O shape ring support (9) is a ceramic material, and said L packing ring (10) is a corrosion resistant rubber material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205121432U CN202381384U (en) | 2011-12-11 | 2011-12-11 | Mechanical sealing device for plastic pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205121432U CN202381384U (en) | 2011-12-11 | 2011-12-11 | Mechanical sealing device for plastic pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202381384U true CN202381384U (en) | 2012-08-15 |
Family
ID=46629890
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011205121432U Expired - Fee Related CN202381384U (en) | 2011-12-11 | 2011-12-11 | Mechanical sealing device for plastic pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202381384U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109072925A (en) * | 2016-03-22 | 2018-12-21 | Ksb股份有限公司 | Centrifugal pump with sliding-ring seal |
-
2011
- 2011-12-11 CN CN2011205121432U patent/CN202381384U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109072925A (en) * | 2016-03-22 | 2018-12-21 | Ksb股份有限公司 | Centrifugal pump with sliding-ring seal |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120815 Termination date: 20131211 |