CN207801627U - A kind of bearing seal structure reducing high pressure Ex "p" enclosure motor leakage rate - Google Patents
A kind of bearing seal structure reducing high pressure Ex "p" enclosure motor leakage rate Download PDFInfo
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- CN207801627U CN207801627U CN201721777447.5U CN201721777447U CN207801627U CN 207801627 U CN207801627 U CN 207801627U CN 201721777447 U CN201721777447 U CN 201721777447U CN 207801627 U CN207801627 U CN 207801627U
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- bearing
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- recess portion
- sealing ring
- cover
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- Sealing Of Bearings (AREA)
Abstract
The utility model provides a kind of bearing seal structure reducing high pressure Ex "p" enclosure motor leakage rate, bearing including machine shaft and support machine shaft, bearing includes internal bearing cover, internal bearing cover includes semicircle bearing upper cover and semicircle bearing lower cover, it is bolted between bearing upper cover and lower cover, internal bearing cover inner surface is circumferentially arranged with groove, sealing ring is equipped in groove, groove includes the first recess portion and the second recess portion, the axial width of first recess portion is less than the axial width of the second recess portion, first, second recess portion collectively forms type shape, there are two protruding portions for tool on the side surface that sealing ring is contacted with groove, two protruding portions are mounted in the first recess portion, the snap ring being pressed on two protruding portions respectively on the first recess portion inner wall is provided between two protruding portions.The utility model can effectively prevent motor internal gas from, to outward leakage, reducing the quantity of gas leakage of Ex "p" enclosure motor by venthole at internal bearing cover and machine shaft junction, bearing.
Description
Technical field
The utility model belongs to the technical field of high pressure Ex "p" enclosure flame-proof electric motor, and in particular to a kind of reduction high pressure
The bearing seal structure of Ex "p" enclosure motor quantity of gas leakage.
Background technology
High pressure Ex "p" enclosure flame-proof electric motor has had been more and more widely used because not limited by the Te times.
By ventilating to motor inside（Clean instrument wind gas or nitrogen）, under certain admission pressure, work as charge flow rate
When reaching certain value, the atmospheric pressure of base inner is more than outside atmospheric pressure, and positive pressure blow device opens pressure holding function, motor
It can start and run well.This requires Ex "p" enclosure motor have good sealing performance, lower quantity of gas leakage,
Base inner, which can reach, quickly and effectively to be purged, and the gas consumption of motor purging can be effectively saved, and is saved with gas cost for user.
In the prior art, reinforce engine base and cooler junction sealing, engine base and end cap junction sealing and engine base
It is sealed at upper each line outlet, is the effective ways for reducing Ex "p" enclosure motor quantity of gas leakage.
But since YZYKK, YZYKS positive pressure type motor exploitation of new generation, the A type pad bearing structures used, in bearing block
At the venthole of lower section, air leakage is larger, and the venthole at this is oil pressure setting in equalizer bearing, cannot cancel or reduce, therefore,
To being effectively sealed processing at above-mentioned bearing, and reduce one primary that the air leakage at bearing is currently urgently to be resolved hurrily
Business.
Utility model content
The purpose of this utility model is to provide a kind of bearing reducing high pressure Ex "p" enclosure motor quantity of gas leakage is close
Seal structure is arranged sealing ring in internal bearing cover inner surface and machine shaft junction, can effectively prevent motor internal gas
By venthole at internal bearing cover and machine shaft junction, bearing to outward leakage, the gas for reducing Ex "p" enclosure motor is let out
Leakage quantity quickly and effectively purges to make base inner reach, save motor purging gas consumption, for user save with gas at
This.
The utility model adopts the following technical solution：A kind of bearing reducing high pressure Ex "p" enclosure motor quantity of gas leakage
Sealing structure, including machine shaft and the bearing for supporting the machine shaft, bearing includes internal bearing cover, the internal bearing cover packet
Semicircle bearing upper cover and semicircle bearing lower cover are included, is bolted between the bearing upper cover and bearing lower cover, it is special
Sign is, circumferentially arranged fluted in the inner surface of the internal bearing cover, and sealing ring, the groove are provided in the groove
Including the first recess portion and the second recess portion, the axial width of first recess portion is less than the axial width of the second recess portion, the first recess portion
Type shape is collectively formed with the second recess portion, tool is there are two protruding portion on the side surface that the sealing ring is contacted with groove, and two
A protruding portion is mounted in first recess portion, and snap ring is provided between two protruding portions, and the snap ring is by two protruding portions
It is pressed on respectively on the inner wall of first recess portion.
It is connect with the machine shaft after installation sealing ring in the internal bearing cover inner surface recesses, the sealing ring is whole
In the groove, the height of the sealing ring is not more than the radial depth of the groove.
The sealing ring has multiple recess portions on the side surface towards the machine shaft.
The of same size or width of multiple recess portions differs.
The groove include positioned at bearing upper cover inner surface upper groove and under bearing interior surface lower groove, institute
It includes the upper sealing ring being located in upper groove and the lower seal in lower groove to state sealing ring.
The snap ring is replaced with into spring.
The upper sealing ring and lower seal integrated molding or non-integral molding.
The sealing ring adds YS20 soluble polyimides molded by polytetrafluoroethylene (PTFE).
The beneficial effects of the utility model are as follows：
（1）The utility model is simple in structure, and sealing effect is good, and bearing upper cover, bearing lower cover and sealing ring are convenient for disassembly and assembly, just
In later maintenance；
（2）In bearing upper cover and bearing lower cover after installation sealing ring, it is connected with machine shaft, makes the gas inside motor
Form positive seal cavity in junction, to prevent motor internal gas by bearing and machine shaft junction, bearing at
Venthole etc. is to outward leakage；
（3）It solves the problems, such as that A profile shaft watt venthole air leakages are big, reduces the quantity of gas leakage inside motor, effectively save
The gas consumption of power saver purging, is saved for user with gas cost；
（4）The utility model structure does not change position and the size of bearing block venthole itself, to the indoor oil pressure of bearing
It does not influence, is not in motor Leakage.
Description of the drawings
It, below will be to required use in embodiment in order to illustrate more clearly of the technical solution of the utility model embodiment
Attached drawing be briefly described, it should be apparent that, the accompanying drawings in the following description is only the embodiments of the present invention, for this
For the those of ordinary skill of field, without having to pay creative labor, it can also be obtained according to these attached drawings other
Attached drawing.
Fig. 1 is the structural schematic diagram of the utility model；
Fig. 2 is the enlarged drawing of location A in Fig. 1；
Fig. 3 is the structural schematic diagram of internal bearing cover；
Fig. 4 is the structural schematic diagram of sealing ring.
Specific implementation mode
In order to keep the technical purpose, technical solution and advantageous effect of the utility model clearer, below in conjunction with the accompanying drawings and
Specific embodiment is further illustrated the technical solution of the utility model.
As shown in Figures 1 to 4, the utility model reduces the bearing seal knot of high pressure Ex "p" enclosure motor quantity of gas leakage
Structure, including the machine shaft 2 of motor 1 and the bearing for supporting the machine shaft 2, bearing include internal bearing cover 3, in the bearing
Lid 3 includes semicircle bearing upper cover 4 and semicircle bearing lower cover 5, passes through bolt between the bearing upper cover 4 and bearing lower cover 5
Connection, hereinafter, being respectively with the axial direction of the circumferential direction of internal bearing cover 3, the radial direction of internal bearing cover 3, internal bearing cover 3
Circumferential direction, radial direction, axial direction are described.
It is provided with sealing ring 7, institute in the inner surface of the internal bearing cover 3 circumferentially arranged fluted 6, the groove 6
It includes the lower groove 62 positioned at the upper groove 61 of 4 inner surface of bearing upper cover and positioned at 5 inner surface of bearing lower cover to state groove 6, described
Sealing ring 7 includes the upper sealing ring 71 being mounted in upper groove 61 and the lower seal 72 in lower groove 62.Upper groove
61 is identical with 62 shape of lower groove and join end to end, and upper groove 61 and lower groove 62 collectively form concentric ring recesses.
It is connect with the machine shaft 2 after installation sealing ring 7 in the groove 6 of 3 inner surface of the internal bearing cover, the sealing
Circle 7 is integrally located in the groove 6, and the height of the sealing ring 7 is not more than the radial depth of the groove 6.Sealing ring 7 is set to exist
While playing sealing function, the connection of internal bearing cover 3 and shaft 2 is not interfered.
The groove includes the first recess portion and the second recess portion, specifically, upper groove 61 has the first recess portion 63 and second recessed
Portion 64,
The axial width of first recess portion 63 is less than the axial width of the second recess portion 64, and the first recess portion 63 and the second recess portion 64 are total
With composition "convex" shaped shape.The planform of lower groove 62 is identical as upper groove 61, repeats no more, and lower groove 62 is in the shape of a " convex "
Shape, it is symmetrical with the "convex" shaped shape of upper groove 61.
There are two protruding portion 73, two protruding portions 73 for tool on the side surface that the upper sealing ring 71 is contacted with upper groove 61
In first recess portion 63, interval is equipped between two protruding portions 73, and snap ring is provided between two protruding portions 73
8, two protruding portions 73 are pressed on the inner wall of first recess portion 63 by the snap ring 8 respectively, to make sealing ring 71 realize
To effective sealing at bearing.
The upper sealing ring 71 has multiple recess portions 74 on the surface towards 2 side of machine shaft, multiple recess portions 74
Width can be identical, can not also be identical.In the present embodiment, recess portion 74 be four, width be respectively 10mm, 9mm, 10mm,
9mm, recess portion interval of same size setting, but the utility model is without being limited thereto, and the number of recess portion 74, width and arrangement are unrestricted
System.Lower seal 72 is identical as the structure of upper sealing ring 71, repeats no more, snap ring 8 be similarly positioned in two of lower seal 72 it is prominent
Go out between portion, and two protruding portions of lower seal 72 are pressed on the first recess portion of lower seal 72 by the snap ring 8 respectively
On inner wall.
In the present embodiment, snap ring is used to the protruding portion of sealing ring being pressed on the inner wall of the first recess portion of groove, to real
Existing effect sealing, but it is not limited to the form of snap ring, for example, snap ring can be replaced with to spring or other forms, as long as can be real
Now the protruding portion of sealing ring is pressed on the inner wall of the first recess portion of groove, achievees the effect that sealing.
When machine shaft 2 rotates, sealing ring 7 does not rotate.By the setting of above-mentioned sealing ring 7, sealing ring 7 and sliding bearing
Inner cover 3 and 2 surface of machine shaft form the positive seal cavity of annular, and motor internal gas is effectively prevented to pass through internal bearing cover
With venthole etc. at machine shaft junction, bearing to outward leakage, to reach the gas leakage for reducing Ex "p" enclosure motor
The purpose of amount.Above-mentioned sealing structure is respectively provided on the inner surface of the internal bearing cover at the both ends of machine shaft 2.
In the present embodiment, the upper sealing ring 71 and the lower seal 72 can be integrally formed, but the utility model is not
It is limited to this, it may occur to persons skilled in the art that upper sealing ring 71 and the lower seal 72 are molded alone respectively, respectively
In upper groove 61 and lower groove 62.
In the present embodiment, the sealing ring 7 adds YS20 soluble polyimides molded by polytetrafluoroethylene (PTFE), but this reality
With novel without being limited thereto, it may occur to persons skilled in the art that preparing sealing ring with other well known materials and method.
The beneficial effects of the utility model are as follows：
（1）The utility model is simple in structure, and sealing effect is good, and bearing upper cover, bearing lower cover and sealing ring are convenient for disassembly and assembly, just
In later maintenance；
（2）In bearing upper cover and bearing lower cover after installation sealing ring, it is connected with machine shaft, makes the gas inside motor
Positive seal cavity is formed in junction, to prevent motor internal gas from passing through internal bearing cover and machine shaft junction, axis
Place's venthole etc. is held to outward leakage；
（3）It solves the problems, such as that A profile shaft watt venthole air leakages are big, reduces the quantity of gas leakage inside motor, effectively save
The gas consumption of power saver purging, is saved for user with gas cost；
（4）The utility model structure does not change position and the size of bearing block venthole itself, to the indoor oil pressure of bearing
It does not influence, is not in motor Leakage.
It should be noted last that：The technical solution of the utility model that the above embodiments are only illustrative and not limiting is appointed
What to the utility model carry out equivalent replacement and do not depart from the spirit and scope of the utility model modification or part replace,
It should cover within the scope of the utility model claims are protected.
Claims (8)
1. a kind of bearing seal structure reducing high pressure Ex "p" enclosure motor leakage rate, including machine shaft and the support electricity
The bearing of machine shaft, bearing include internal bearing cover, and the internal bearing cover includes semicircle bearing upper cover and semicircle bearing lower cover,
It is bolted between the bearing upper cover and bearing lower cover, which is characterized in that in the inner surface edge week of the internal bearing cover
It is fluted to being arranged, sealing ring is provided in the groove, the groove includes the first recess portion and the second recess portion, and described first is recessed
The axial width in portion is less than the axial width of the second recess portion, and the first recess portion and the second recess portion collectively form type shape, described close
There are two protruding portions, two protruding portions to be mounted in first recess portion for tool on the side surface that seal is contacted with groove, and two
Snap ring is provided between a protruding portion, two protruding portions are pressed on the inner wall of first recess portion by the snap ring respectively.
2. a kind of bearing seal structure reducing high pressure Ex "p" enclosure motor leakage rate according to claim 1, special
Sign is, is connect with the machine shaft after installation sealing ring in the internal bearing cover inner surface recesses, the sealing ring is whole
In the groove, the height of the sealing ring is not more than the radial depth of the groove.
3. a kind of bearing seal structure reducing high pressure Ex "p" enclosure motor leakage rate according to claim 2, special
Sign is that the sealing ring has multiple recess portions on the side surface towards the machine shaft.
4. a kind of bearing seal structure reducing high pressure Ex "p" enclosure motor leakage rate according to claim 3, special
Sign is that the of same size or width of multiple recess portions differs.
5. a kind of bearing seal structure reducing high pressure Ex "p" enclosure motor leakage rate according to claim 4, special
Sign is, the groove includes the lower groove of the interior surface positioned at the upper groove of bearing upper cover inner surface and under bearing, institute
It includes the upper sealing ring being located in upper groove and the lower seal in lower groove to state sealing ring.
6. a kind of bearing seal structure reducing high pressure Ex "p" enclosure motor leakage rate according to claim 5, special
Sign is, the snap ring is replaced with spring.
7. a kind of bearing seal structure reducing high pressure Ex "p" enclosure motor leakage rate according to claim 5, special
Sign is, the upper sealing ring and lower seal is integrally formed or non-integral molding.
8. a kind of bearing seal structure reducing high pressure Ex "p" enclosure motor leakage rate according to claim 7, special
Sign is that the sealing ring adds YS20 soluble polyimides molded by polytetrafluoroethylene (PTFE).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721777447.5U CN207801627U (en) | 2017-12-19 | 2017-12-19 | A kind of bearing seal structure reducing high pressure Ex "p" enclosure motor leakage rate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721777447.5U CN207801627U (en) | 2017-12-19 | 2017-12-19 | A kind of bearing seal structure reducing high pressure Ex "p" enclosure motor leakage rate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207801627U true CN207801627U (en) | 2018-08-31 |
Family
ID=63281719
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721777447.5U Active CN207801627U (en) | 2017-12-19 | 2017-12-19 | A kind of bearing seal structure reducing high pressure Ex "p" enclosure motor leakage rate |
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| CN (1) | CN207801627U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112713714A (en) * | 2020-12-18 | 2021-04-27 | 中车永济电机有限公司 | Water-cooling explosion-proof motor with improved structure |
| CN113824241A (en) * | 2021-09-22 | 2021-12-21 | 刘伟鹏 | Vibrating screening machine |
-
2017
- 2017-12-19 CN CN201721777447.5U patent/CN207801627U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112713714A (en) * | 2020-12-18 | 2021-04-27 | 中车永济电机有限公司 | Water-cooling explosion-proof motor with improved structure |
| CN113824241A (en) * | 2021-09-22 | 2021-12-21 | 刘伟鹏 | Vibrating screening machine |
| CN113824241B (en) * | 2021-09-22 | 2024-05-17 | 刘伟鹏 | Vibration screening machine |
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