CN103775652A - Double-spiral magnetic liquid sealing device - Google Patents
Double-spiral magnetic liquid sealing device Download PDFInfo
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- CN103775652A CN103775652A CN201410022366.9A CN201410022366A CN103775652A CN 103775652 A CN103775652 A CN 103775652A CN 201410022366 A CN201410022366 A CN 201410022366A CN 103775652 A CN103775652 A CN 103775652A
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- hand screw
- screw cover
- flat key
- rotating shaft
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Abstract
The invention provides a double-spiral magnetic liquid sealing device and belongs to the field of mechanical engineering sealing. The double-spiral magnetic liquid sealing device can be used for solving the problem of certain degree of leakage existing in the starting and stopping stages of an existing double-spiral sealing device. The double-spiral magnetic liquid sealing device consists of a rotating shaft (1), a shell (2), a left spiral sleeve (3-1), a permanent magnet (4), a right spiral sleeve (3-2), a shaft sleeve and the like, wherein the permanent magnet (4) is arranged between the left spiral sleeve (3-1) and the right spiral sleeve (3-2); a magnetic liquid is infused into a sealing part by virtue of a hole of the shell (2). A magnetic loop is formed by the permanent magnet (4), the left spiral sleeve (3-1) and the right spiral sleeve (3-2), so that the magnetic liquid is reserved in sealing gaps even in the staring and stopping stages of a machine, and the occurrence of leakage is prevented.
Description
Technical field
The invention belongs to sealing field of mechanical engineering.
Background technique
Double spiral seal is because it is simple in structure, and sealing can lean against field of sealing technology and obtain application more and more widely.Existing Double-screw sealing device must move and can reach desirable sealing effect under high rotating speed, and it all exists leakage problem to a certain degree in startup and stopping phase, serves and wastes and exist certain potential safety hazard to industrial production band.
Summary of the invention
The technical issues that need to address of the present invention are, existing Double-screw sealing device must move and can reach desirable sealing effect under high rotating speed, and it is starting and stopping phase all exists leakage problem to a certain degree.Therefore a kind of double helix magnetic fluid seal device is proposed.
The technical solution adopted for the present invention to solve the technical problems is:
A kind of double helix magnetic fluid seal device, forms this device and comprises:
Rotating shaft, shell, left hand screw cover, permanent magnet, right-hand screw cover, axle sleeve, the first flat key, the second flat key, the 3rd flat key;
Form the connection between the each several part of this device:
Described the first flat key, the second flat key, the 3rd flat key are arranged in the flat key groove in rotating shaft;
Described left hand screw is sleeved on the excircle of rotating shaft, by the shaft shoulder axially locating in rotating shaft, circumferentially locates by the first flat key;
Described permanent magnet is contained in the right side place of the upper left screw-casing of rotating shaft, circumferentially locates by the second flat key;
Described right-hand screw is sleeved on the right side place of permanent magnet in rotating shaft, circumferentially locates by the 3rd flat key;
Described axle sleeve is contained in the right side place of the upper right screw-casing of rotating shaft;
The above-mentioned Runner assembly that is connected to form;
Described Runner assembly is arranged in shell;
Shell, left hand screw cover, right-hand screw cover are made up of magnetic conductive material, as 2Cr13.
Described rotating shaft is made up of non-magnetic material, as stainless steel.
What in the hole a above shell, inject is magnetic liquid.
Thread rotary orientation on the periphery of the screw thread on the periphery of left hand screw cover and right-hand screw cover is contrary, when having left-handed thread on the periphery of left hand screw cover, on the periphery of right-hand screw cover, have right-handed thread, the sense of rotation of described rotatable parts is for being viewed as clockwise direction from left side; When having right-handed thread on the periphery of left hand screw cover, on the periphery of right-hand screw cover, have left-handed thread, the sense of rotation of described rotatable parts is for being viewed as from left side counterclockwise.
In the time that rotatable parts rotate, the magnetic liquid that enters into left hand screw cover and right-hand screw cover is known from experience because the impetus that left hand screw overlaps and right-hand screw puts screw thread is pushed to permanent magnet position.Form the object that fluid-tight has reached sealing.
In the time starting and stop, because the impetus of screw thread is not obvious, now, permanent magnet, shell, left hand screw cover, right-hand screw cover have formed magnetic loop magnetic liquid have been fixed on the tip position of screw thread.Form the object that magnetic fluid sealing has reached sealing.
The present invention compares had beneficial effect with prior art:
The present invention, owing to adopting the form of magnetic fluid sealing and double spiral seal combination, has solved the leakage problem of existing Double-screw sealing device in startup and stopping phase.
Accompanying drawing explanation
A kind of double helix magnetic fluid seal device of Fig. 1 structural drawing.
Embodiment
Take accompanying drawing as embodiment, the invention will be further described:
A kind of double helix magnetic fluid seal device, as Fig. 1, sealing device comprises: rotating shaft 1, shell 2, left hand screw cover 3-1, permanent magnet 4, right-hand screw cover 3-2, axle sleeve 5, the first flat key 6, the second flat key 7, the 3rd flat key 8;
Form the connection between the each several part of this device:
Described the first flat key 6, the second flat key 7, the 3rd flat key 8 are arranged in the flat key groove in rotating shaft 1;
Described left hand screw cover 3-1 is contained on the excircle of rotating shaft 1, by the shaft shoulder axially locating in rotating shaft 1, circumferentially locates by the first flat key 6;
Described permanent magnet 4 is contained in the right side place of the upper left screw-casing 3-1 of rotating shaft 1, circumferentially locates by the second flat key 7;
Described right-hand screw cover 3-2 is contained in the right side place of permanent magnet 4 in rotating shaft 1, circumferentially locates by the 3rd flat key 8;
Described axle sleeve 5 is contained in the right side place of the upper right screw-casing 3-2 of rotating shaft 1;
The above-mentioned Runner assembly that is connected to form;
Described Runner assembly is arranged in shell 2;
Thread rotary orientation on the periphery of screw thread on the periphery of left hand screw cover 3-1 and right-hand screw cover 3-2 is contrary, when having left-handed thread on the periphery of left hand screw cover 3-1, on the periphery of right-hand screw cover 3-2, have right-handed thread, the sense of rotation of described rotatable parts is for being viewed as clockwise direction from left side; When having right-handed thread on the periphery of left hand screw cover 3-1, on the periphery of right-hand screw cover 3-2, have left-handed thread, the sense of rotation of described rotatable parts is for being viewed as from left side counterclockwise.
In the time that rotatable parts rotate, the magnetic liquid that enters into left hand screw cover 3-1 and right-hand screw cover 3-2 is known from experience the impetus of overlapping 3-1 and the upper screw thread of right-hand screw cover 3-2 due to left hand screw to permanent magnet 4 position extruding.Form the object that fluid-tight has reached sealing.
In the time starting and stop, because the impetus of screw thread is not obvious, now, permanent magnet 4, shell 2, left hand screw cover 3-1, right-hand screw cover 3-2 have formed magnetic loop magnetic liquid have been fixed on the tip position of screw thread.Form the object that magnetic fluid sealing has reached sealing.
Described rotating shaft 1 is made up of non-magnetic material, as stainless steel.
What in shell 2 hole a above, inject is magnetic liquid.
Claims (2)
1. a double helix magnetic fluid seal device, forms this device and comprises:
Rotating shaft (1), shell (2), left hand screw cover (3-1), permanent magnet (4), right-hand screw cover (3-2), axle sleeve (5), the first flat key (6), the second flat key (7), the 3rd flat key (8);
Form the connection between the each several part of this device:
Described the first flat key (6), the second flat key (7), the 3rd flat key (8) are arranged in the flat key groove in rotating shaft (1);
Described left hand screw cover (3-1) is contained on the excircle of rotating shaft (1), by the shaft shoulder axially locating in rotating shaft (1), circumferentially locates by the first flat key (6);
Described permanent magnet (4) is contained in the right side place of the upper left screw-casing of rotating shaft (1) (3-1), circumferentially locates by the second flat key (7);
Described right-hand screw cover (3-2) is contained in the right side place of the upper permanent magnet (4) of rotating shaft (1), circumferentially locates by the 3rd flat key (8);
Described axle sleeve (5) is contained in the right side place of the upper right screw-casing of rotating shaft (1) (3-2);
The above-mentioned Runner assembly that is connected to form;
Described Runner assembly is arranged in shell (2);
It is characterized in that:
Between the left side of the right side of left hand screw cover (3-1) and right-hand screw cover (3-2), permanent magnet is installed;
What in the hole a on shell (2), inject is magnetic liquid.
2. a kind of double helix magnetic fluid seal device according to claim 1, it is characterized in that: the thread rotary orientation on the periphery of the screw thread on the periphery of left hand screw cover (3-1) and right-hand screw cover (3-2) is contrary, when having left-handed thread on the periphery of left hand screw cover (3-1), on the periphery of right-hand screw cover (3-2), have right-handed thread, the sense of rotation of described rotatable parts is for being viewed as clockwise direction from left side; When having right-handed thread on the periphery of left hand screw cover (3-1), on the periphery of right-hand screw cover (3-2), have left-handed thread, the sense of rotation of described rotatable parts is for being viewed as from left side counterclockwise.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410022366.9A CN103775652B (en) | 2014-01-17 | 2014-01-17 | A kind of double helix magnetic fluid seal device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410022366.9A CN103775652B (en) | 2014-01-17 | 2014-01-17 | A kind of double helix magnetic fluid seal device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103775652A true CN103775652A (en) | 2014-05-07 |
| CN103775652B CN103775652B (en) | 2016-01-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410022366.9A Expired - Fee Related CN103775652B (en) | 2014-01-17 | 2014-01-17 | A kind of double helix magnetic fluid seal device |
Country Status (1)
| Country | Link |
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| CN (1) | CN103775652B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108204364A (en) * | 2017-12-29 | 2018-06-26 | 浙江创为真空设备股份有限公司 | A kind of Roots vaccum pump shaft seal structure |
| CN110553040A (en) * | 2019-09-08 | 2019-12-10 | 北京化工大学 | spiral magnetic fluid sealing structure for oil-gas two-phase lubricating bearing box |
| CN113969983A (en) * | 2021-11-18 | 2022-01-25 | 北京交通大学 | Magnetic liquid sealing device |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59147162A (en) * | 1983-02-09 | 1984-08-23 | Mitsubishi Electric Corp | Magnetic fluid seal device |
| CN2211517Y (en) * | 1994-08-19 | 1995-11-01 | 杨逢瑜 | Two gear magnetofluid sealer |
| CN2575377Y (en) * | 2002-10-22 | 2003-09-24 | 李如良 | Automatic regulating temperature valve for warming |
| CN102128271A (en) * | 2011-01-16 | 2011-07-20 | 北京交通大学 | Magnetic liquid sealing device capable of microwave heating |
-
2014
- 2014-01-17 CN CN201410022366.9A patent/CN103775652B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59147162A (en) * | 1983-02-09 | 1984-08-23 | Mitsubishi Electric Corp | Magnetic fluid seal device |
| CN2211517Y (en) * | 1994-08-19 | 1995-11-01 | 杨逢瑜 | Two gear magnetofluid sealer |
| CN2575377Y (en) * | 2002-10-22 | 2003-09-24 | 李如良 | Automatic regulating temperature valve for warming |
| CN102128271A (en) * | 2011-01-16 | 2011-07-20 | 北京交通大学 | Magnetic liquid sealing device capable of microwave heating |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108204364A (en) * | 2017-12-29 | 2018-06-26 | 浙江创为真空设备股份有限公司 | A kind of Roots vaccum pump shaft seal structure |
| CN110553040A (en) * | 2019-09-08 | 2019-12-10 | 北京化工大学 | spiral magnetic fluid sealing structure for oil-gas two-phase lubricating bearing box |
| CN113969983A (en) * | 2021-11-18 | 2022-01-25 | 北京交通大学 | Magnetic liquid sealing device |
| CN113969983B (en) * | 2021-11-18 | 2023-10-13 | 北京交通大学 | Magnetic liquid sealing device |
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| Publication number | Publication date |
|---|---|
| CN103775652B (en) | 2016-01-20 |
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Granted publication date: 20160120 Termination date: 20200117 |
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