CN201956790U - Mechanical seal structure of transmission shaft of variable frequency motor - Google Patents
Mechanical seal structure of transmission shaft of variable frequency motor Download PDFInfo
- Publication number
- CN201956790U CN201956790U CN2011200802254U CN201120080225U CN201956790U CN 201956790 U CN201956790 U CN 201956790U CN 2011200802254 U CN2011200802254 U CN 2011200802254U CN 201120080225 U CN201120080225 U CN 201120080225U CN 201956790 U CN201956790 U CN 201956790U
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- Prior art keywords
- bearing
- transmission shaft
- felt
- seal groove
- frequency motor
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- Rolling Contact Bearings (AREA)
Abstract
The utility model discloses a mechanical seal structure of a transmission shaft of a variable frequency motor, relating to a bearing block structure of a transmission shaft of a motor. The seal structure comprises at least one concave centrifugal seal groove arranged at the bearing cover plate end part at one end of a bearing cover plate, which is in contact with a shaft sleeve, and at least one concave felt seal groove, wherein the felt seal groove is internally provided with a felt. The technical problem that thermal expansion caused by rise of temperature enables a maze sealing element to generate friction suspension to further aggravate the rise of temperature and make abnormal noise to influence the normal operation of equipment in the prior art is solved, and the rise of temperature and abnormal noise cannot be caused even if a heavy load exists.
Description
Technical field
The utility model relates to the bearing block structure of motor transmission shaft, exactly relates to the bearing pedestal hermetically-sealed construction of variable-frequency motor.
Background technology
Motor transmission shaft adopts belt transmission in the frequency conversion rig drive system, and its primary structure comprises bearing, axle sleeve, bearing pedestal, bearing cover and bearing pedestal hermetically-sealed construction, and the bearing pedestal hermetically-sealed construction is between axle sleeve and bearing cover.
As publication number is 101741166A, the Chinese patent literature that open day is on June 16th, 2010 discloses a kind of end cover that is used for motor and generator, it is by the rolling bearing that is connected in motor or generator shaft, bearing inner end cap, bearing keep off outward, bearing outer end cap and the bearing pedestal that is fixed on electric machine stand are formed, and the outer retaining of the bearing of its rolling bearing inner ring axle head cooperates the formation inner stopper to be connected circuitous " S " type labyrinth seal chamber mutually with the outsourcing mouth with the bearing outer end cap; Its adopts the outer retaining of the bearing of rolling bearing inner ring axle head and bearing outer end cap is processed into the technical scheme that inner stopper and outsourcing mouth are connected circuitous " S " type labyrinth seal chamber mutually, it has overcome the existing hermetically-sealed construction that is used for the sealed insulation end cap of motor and generator, because of poor sealing performance, cause the bearing chamber oil starvation, it is too high and damage to cause bearing temperature, and the easy moisture absorption of ceramic insulating material causes defectives such as failure of insulation easily; It is fit to do the insulated end cover of various motor and generator, is particularly suitable for using on wind-driven generator or variable-frequency motor.
But above-mentioned prior art, in actual use, owing to only have the labyrinth seal chamber of " S " type, after the prolonged use, sealing property is bad, for this reason, the supporting bearing base that has occurred a kind of motor transmission shaft in the prior art is sealed into the structure (as shown in Figure 3 and Figure 4) that labyrinth seal adds the centrifugal seal formula, be used for sealed bearing lubricating grease but because the bearing pedestal radiating condition is bad, and cause spring bearing place temperature to raise, the gap between the labyrinth seal is less in addition, the thermal expansion that the temperature rising produces produces labyrinth seal and wipes extension, particularly all the more so under heavy load, thus further aggravate temperature rise and sent abnormal sound, influence the normal operation of equipment.
The utility model content
For solving the problems of the technologies described above, the utility model proposes a kind of variable-frequency motor power transmission shaft mechanical seal structure, the utility model has thoroughly solved in the prior art because the thermal expansion that the temperature rising produces is hung labyrinth seal generation wiping, thereby further aggravate temperature rise and send abnormal sound, influence the technical problem of the normal operation of equipment, even and temperature rise under heavy load, also can not occur and send abnormal sound.
The utility model is realized by adopting following technical proposals:
A kind of variable-frequency motor power transmission shaft mechanical seal structure, it is characterized in that: hermetically-sealed construction is included in the centrifugal seal groove that bearing cover contacts that end with axle sleeve bearing cover end is provided with at least one indent, with the felt seal groove of at least one indent, be provided with felt in the described felt seal groove.
Described hermetically-sealed construction is two, is separately positioned on the bearing cover on bearing pedestal both sides.
Described centrifugal seal groove is two.
Compared with prior art, the beneficial effects of the utility model show:
Hermetically-sealed construction of the present utility model, adopt the mixed structure of centrifugal seal and felt sealing, such version, adding centrifugal seal with the labyrinth seal of former bearing pedestal compares, thoroughly solved in the prior art because the thermal expansion that the temperature rising produces is hung labyrinth seal generation wiping, thereby further aggravate temperature rise and send abnormal sound, influence the technical problem of the normal operation of equipment, and hermetically-sealed construction all is positioned at the bearing cover end of bearing cover and axle sleeve contact position, like this, do not send abnormal sound even under heavy load, can not make seal produce the wiping extension and temperature rise occur yet; Two hermetically-sealed constructions are installed in respectively on the bearing cover on bearing pedestal both sides, so that the lubricating grease of sealed bearing, the centrifugal seal groove is two, match with a felt seal groove, and sealing effectiveness reaches best when reducing production costs; The utility model novel structure, simple, high lubricating effect.
Description of drawings
The utility model is described in further detail below in conjunction with specification drawings and specific embodiments, wherein:
Fig. 1 is a structural representation of the present utility model
Fig. 2 is an A portion enlarged drawing among Fig. 1
Fig. 3 adds the centrifugal seal structural representation for existing labyrinth seal
Fig. 4 is an A portion enlarged drawing among Fig. 3
Mark among the figure:
1, bearing, 2, axle sleeve, 3, bearing pedestal, 4, bearing, 5, the centrifugal seal groove, 6, felt, 7, labyrinth seal.
Embodiment
With reference to Figure of description 1 and 2, preferred forms of the present utility model is: hermetically-sealed construction is included in the centrifugal seal groove that bearing cover contacts that end with axle sleeve bearing cover end is provided with two indents, with the felt seal groove of an indent, be provided with felt in the described felt seal groove.Hermetically-sealed construction is two, is separately positioned on the bearing cover on bearing pedestal both sides.
Two bearing pedestals of motor transmission shaft have all adopted the sealing structure, are used for the sealing of lubricating grease between bearing cover and the axle sleeve.Hermetically-sealed construction is positioned on the bearing cover, is made up of two centrifugal seal grooves and a felt sealing.
Earlier felt is packed into during assembling in the seal groove of bearing cover, axle sleeve, bearing inner race are seated on axle, bearing cover is contained in respectively on the corresponding axle sleeve, again bearing outer ring is seated on bearing pedestal, bearing pedestal is assembled to correct position, respectively bolt of bearing cap is tightened, at last axle head baffle plate and baffle plate bolt are tightened.
Two bearing pedestals of ZJ40DBS-J motor transmission shaft have all adopted the sealing structure, use so far from 2009, and are respond well.Add centrifugal seal with the labyrinth seal of former bearing pedestal and compare, spring bearing place temperature height is particularly under heavy load even send metal and wipe the problem of extension sound and be resolved.
Certainly, the centrifugal seal groove also can be set to 3 or more than, the felt seal groove also can be set to 2 or more than.
Claims (3)
1. variable-frequency motor power transmission shaft mechanical seal structure, it is characterized in that: hermetically-sealed construction is included in the centrifugal seal groove that bearing cover contacts that end with axle sleeve bearing cover end is provided with at least one indent, with the felt seal groove of at least one indent, be provided with felt in the described felt seal groove.
2. variable-frequency motor power transmission shaft mechanical seal structure according to claim 1, it is characterized in that: described hermetically-sealed construction is two, is separately positioned on the bearing cover on bearing pedestal both sides.
3. variable-frequency motor power transmission shaft mechanical seal structure according to claim 1 and 2 is characterized in that: described centrifugal seal groove is two.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200802254U CN201956790U (en) | 2011-03-24 | 2011-03-24 | Mechanical seal structure of transmission shaft of variable frequency motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200802254U CN201956790U (en) | 2011-03-24 | 2011-03-24 | Mechanical seal structure of transmission shaft of variable frequency motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201956790U true CN201956790U (en) | 2011-08-31 |
Family
ID=44500892
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011200802254U Expired - Lifetime CN201956790U (en) | 2011-03-24 | 2011-03-24 | Mechanical seal structure of transmission shaft of variable frequency motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201956790U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103516107A (en) * | 2012-06-30 | 2014-01-15 | 洛阳嘉维轴承制造有限公司 | Method for sealing small-and-medium-size vertical motor bearing components |
-
2011
- 2011-03-24 CN CN2011200802254U patent/CN201956790U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103516107A (en) * | 2012-06-30 | 2014-01-15 | 洛阳嘉维轴承制造有限公司 | Method for sealing small-and-medium-size vertical motor bearing components |
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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: 20110831 |
|
| CX01 | Expiry of patent term |