CN2602220Y - Bolt sealing arrangement of double screw extrusion machine - Google Patents
Bolt sealing arrangement of double screw extrusion machine Download PDFInfo
- Publication number
- CN2602220Y CN2602220Y CN 03228491 CN03228491U CN2602220Y CN 2602220 Y CN2602220 Y CN 2602220Y CN 03228491 CN03228491 CN 03228491 CN 03228491 U CN03228491 U CN 03228491U CN 2602220 Y CN2602220 Y CN 2602220Y
- Authority
- CN
- China
- Prior art keywords
- ring
- screw rod
- shell
- double screw
- seal arrangement
- 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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- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
The utility model provides a double screw extruder screw sealing device, which mainly uses the holding surface sealing method to replace the present rotation sealing method. The device is arranged between a screw and a shell. The utility model is characterized in that two holding covers are fixed on the two ends of the shell as immovable rings, a middle ring is arranged between an oil inlet and an oil return orifice, the two sides of the middle ring is arranged with compressing springs whose bottom is arranged with a movable ring; the movable ring can move along the axis line, and cling to the inner wall of the holding cover under the compressing spring effect, and rotates together with the screw. The clearance between the movable ring and the immovable ring is very small, and the leakage quantity can be controlled within a permit scope, the sealing performance is reliable and the service life is long.
Description
Technical field
The utility model is a kind of seal arrangement, the device that especially a kind of screw rod that is used for double screw extruder seals.
Technical background
In all kinds of double screw extruders, screw rod all has the plasticizing rate of heating and cooling system with the control material.Use the cooling system of outer circulation method the most generally.Its working principle is that the screw rod core is made hollow, squeezes into screw rod inside with controlling the oil of temperature well by the circulatory system, and flow out the circulation back, reaches the purpose of adjusting screw rod temperature.From the double screw extruder of present domestic production, the sealing problem of this system does not obtain fine solution, and the leakage of oil situation is the deficiency of this type of extruder always.
What adopted in the existing extruder is nothing but teflon+O shape circle; Or these two kinds of structural types of material filling type teflon.The former is because O shape circle relatively rotates on axle, and the wearing and tearing of O shape circle are quite severe, and the life-span weak point lost efficacy fast.Though the axial adjustable compensation of latter's material filling type teflon circle is quite severe to the wearing and tearing of the screw rod diameter of axle, when serious screw rod is scrapped.
Summary of the invention
Main purpose of the present utility model is to provide that a kind of sealability is reliable, the life-span is long, to the little double screw extruder screw rod seal arrangement of screw rod axle head wearing and tearing.
For reaching above-mentioned purpose, the utility model adopts a kind of double screw extruder screw rod seal arrangement, be installed between screw rod and the shell, it is characterized in that, comprise that two end cap is separately fixed at the two ends of shell as stationary ring, ring in one is set between filler opening and the return opening, the both sides of middle ring are provided with pressure spring, and the end of pressure spring is installed rotating ring, and rotating ring can move along axis, and under the effect of pressure spring, fit tightly, and can rotate with screw rod with the inwall of end cap.
Aforesaid double screw extruder screw rod seal arrangement is characterized in that the opposite side with respect to end cap on the rotating ring is provided with stiffening ring, and the end of pressure spring is pressed on the stiffening ring.
Aforesaid double screw extruder screw rod seal arrangement is characterized in that rotating ring and stiffening ring bond together with Bond.
Aforesaid double screw extruder screw rod seal arrangement is characterized in that, O shape circle is set respectively between middle ring and screw rod and the shell.
Aforesaid double screw extruder screw rod seal arrangement is characterized in that, O shape circle is set between end cap and the shell.
Aforesaid double screw extruder screw rod seal arrangement is characterized in that, O shape circle is set between rotating ring and the screw rod.
According to above technological scheme as seen, the utlity model has following advantage:
1. the utility model adopts the end face seal mode to replace existing rotary seal mode, and the gap that can keep in touch face is minimum, and leakage rate is controlled in the allowed band, and sealability is reliable.
2. the wearing and tearing of end face seal are less, through facts have proved, 5000 hours only 0.02 millimeter, and almost nil to the wearing and tearing of screw rod axle head, thus have long working life.
3. adopt O shape circle as auxiliary seal in case the leakage between stop ring and the rotating shaft, wherein the O shape of inner ring circle together rotates with screw rod, the O shape circle and the housing of outer ring keep transfixion together, have eliminated because O shape circle rotates the inefficacy that causes.
Further describe concrete structure of the present utility model and feature below with reference to accompanying drawing.
Description of drawings
Fig. 1 is the plan view of the screw rod seal arrangement of the utility model;
Fig. 2 is the side view of the screw rod seal arrangement of the utility model.
Embodiment
Referring to Fig. 1 and Fig. 2, double screw extruder screw rod seal arrangement of the present utility model is mounted between screw rod 12 and the shell 9.Two end cap 1 is fixed on the two ends of shell 9 as stationary ring by screw 11.Be provided with O shape circle 2 between end cap 1 and the shell 9.Be provided with between filler opening 13 and the return opening 14 and encircle 8 in one.O shape circle 6 is set between middle ring 8 and the screw rod 12, and O shape circle 7 is set between the shell 9, will block, prevent internal leakage into and out of oil circuit.The both sides of middle ring 8 are provided with pressure spring 5, and the end of pressure spring 5 is installed rotating ring 4.
Rotating ring 4 can move along axis, and fits tightly with the inwall of end cap 1 under the effect of pressure spring 5, and can rotate with screw rod 12.With respect to the opposite side bonding stiffening ring 10 of end cap 1, the end of pressure spring 5 is pressed on the stiffening ring 10 on rotating ring 4.O shape circle 3 is set between rotating ring 4 and the screw rod 12.
During operation, rotating ring 4 rotates with screw rod 12, and keeps closely contacting with end cap 1 inwall under by the effect of the pressure of sealing liquid body and spring 5, forms end face seal thereby make between rotating ring and the stationary ring.The effect of spring 5 can also compensate for wear and foozle, adapts to because rocking of causing of the angular deviation of rotating part, makes the gap of surface of contact of rotating ring and stationary ring minimum, can keep leakage rate in allowed band.Adopt O shape circle as auxiliary seal in case the leakage between stop ring and the rotating shaft, wherein the O shape of inner ring circle 3,6 together rotate with screw rod 12, the O shape circle of outer ring and housing 9 be transfixion together, rotates the inefficacy that causes thereby eliminated because O shape is enclosed.
Claims (6)
1. double screw extruder screw rod seal arrangement, be installed between screw rod (12) and the shell (9), it is characterized in that, this device comprises that two end cap (1) is separately fixed at the two ends of shell (9) as stationary ring, ring (8) in one is set between filler opening (13) and the return opening (14), the both sides of middle ring (8) are provided with pressure spring (5), the end of pressure spring (5) is installed rotating ring (4), rotating ring (4) can move along axis, and under the effect of pressure spring (5), fit tightly, and can rotate with screw rod (12) with the inwall of end cap (1).
2. double screw extruder screw rod seal arrangement as claimed in claim 1 is characterized in that, the opposite side that rotating ring (4) is gone up with respect to end cap (1) is provided with stiffening ring (10), and the end of pressure spring (5) is pressed on the stiffening ring (10).
3. double screw extruder screw rod seal arrangement as claimed in claim 2 is characterized in that, rotating ring (4) and stiffening ring (10) bond together with Bond.
4. double screw extruder screw rod seal arrangement as claimed in claim 1 is characterized in that, O shape circle (6) is set between middle ring (8) and the screw rod (12), and O shape circle (7) is set between the shell 9.
5. double screw extruder screw rod seal arrangement as claimed in claim 1 is characterized in that, O shape circle (2) is set between end cap (1) and the shell (9).
6. double screw extruder screw rod seal arrangement as claimed in claim 1 is characterized in that, O shape circle (3) is set between rotating ring (4) and the screw rod (12).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03228491 CN2602220Y (en) | 2003-01-28 | 2003-01-28 | Bolt sealing arrangement of double screw extrusion machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03228491 CN2602220Y (en) | 2003-01-28 | 2003-01-28 | Bolt sealing arrangement of double screw extrusion machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2602220Y true CN2602220Y (en) | 2004-02-04 |
Family
ID=34164344
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03228491 Expired - Fee Related CN2602220Y (en) | 2003-01-28 | 2003-01-28 | Bolt sealing arrangement of double screw extrusion machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2602220Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101234526B (en) * | 2008-03-05 | 2011-03-16 | 大连橡胶塑料机械股份有限公司 | Sealing device for extrusion machine screw rod tail |
| CN102695595A (en) * | 2009-08-18 | 2012-09-26 | 丰田自动车株式会社 | Seal ring |
| CN104369346A (en) * | 2014-11-05 | 2015-02-25 | 安徽省新方尊铸造科技有限公司 | Extrusion screw rod with spring and sealing ring |
-
2003
- 2003-01-28 CN CN 03228491 patent/CN2602220Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101234526B (en) * | 2008-03-05 | 2011-03-16 | 大连橡胶塑料机械股份有限公司 | Sealing device for extrusion machine screw rod tail |
| CN102695595A (en) * | 2009-08-18 | 2012-09-26 | 丰田自动车株式会社 | Seal ring |
| CN102695595B (en) * | 2009-08-18 | 2014-10-15 | 丰田自动车株式会社 | Seal ring |
| CN104369346A (en) * | 2014-11-05 | 2015-02-25 | 安徽省新方尊铸造科技有限公司 | Extrusion screw rod with spring and sealing ring |
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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: 20040204 Termination date: 20100128 |