CN201779017U - Vacuum pump rotor axial floating positioning device - Google Patents
Vacuum pump rotor axial floating positioning device Download PDFInfo
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- CN201779017U CN201779017U CN2010202695958U CN201020269595U CN201779017U CN 201779017 U CN201779017 U CN 201779017U CN 2010202695958 U CN2010202695958 U CN 2010202695958U CN 201020269595 U CN201020269595 U CN 201020269595U CN 201779017 U CN201779017 U CN 201779017U
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- rotor
- rotor shaft
- vacuum pump
- positioning device
- bearing
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Abstract
The utility model discloses a vacuum pump rotor axial floating positioning device which comprises a rotor, a rotor shaft, keys, a partition plate bearing, a front cover bearing, a partition plate and a front cover, wherein a through hole is arranged at the center of the rotor, the through hole is provided with a through type first key slot, and concave platforms are arranged at two ends of the rotor; the rotor shaft comprises an optical shaft sheathed in the through hole, the optical shaft is provided with a second key slot, and a convex platform is arranged on the optical shaft corresponding to one concave platform; one part of the keys are in stationary fit and connection with the key slot of the optical shaft of the rotor shaft, and the other part of the keys are in running fit and connection with the through type key slot of the rotor; the partition plate bearing and the front cover bearing are respectively sheathed at two ends of the rotor shaft; and the partition plate is in stationary fit and connection with the partition plate bearing, the front cover is in stationary fit and connection with the front cover bearing, and the end surface of the partition plate and the end surface of the front cover are respectively in running fit and connection with the two end surfaces of the rotor. The vacuum pump rotor axial floating positioning device can greatly improve the reliability and the stability of operation of a pump, prolong the service life of the pump and reduce the repair and maintenance cost of the pump. The vacuum pump rotor axial floating positioning device can realize high effectiveness and low energy consumption of a product.
Description
Technical field
The utility model relates to the vacuum pump technology field, particularly a kind of axial float positioning device for rotor shaft of vacuum pump.
Background technique
Rotary-vane vaccum pump is one of infrastructure device that obtains vacuum, and it is widely used in the every field of modern science and technology research and development and modern production manufacturing.One of major issue that can influence rotary-vane vaccum pump stable operation, whether performance is good is exactly the axially locating problem of rotor in pump cylinder.Axial direction positioning device structural representation of the prior art, as shown in Figure 1, and referring to shown in Figure 2, structure sectional view for A-A shown in Figure 1 place a: end of rotor is fixed with single-row radial ball bearing, because an end of rotor is in the atmosphere, and the other end is in the vacuum, so rotor shaft is subjected to atmospheric pressure shown in Figure 1, just under the effect of this power, the play of single-row radial ball bearing (axially) is pushed to a side, so just, realize the axially locating of rotor fixed end, promptly obtained rational movement clearance between rotor fixed end end face and the protecgulum end face.The end face and the dividing plate end face of the other end floating end of rotor keep rational movement clearance.
The axial direction positioning device of above-mentioned rotor in cylinder body, have the following disadvantages: for fixed end, there is the gap between rotor end-face and the protecgulum end face, no matter course of working or assembly process, the difficulty of control size precision is all very big, and in the actual motion of pump, the gap very easily changes, thereby causes the instability of pump operation; For the other end floating end,, be difficult to meet the later gap demand of the actual thermal expansion of rotor between the interstitial area of reservation because the practical operation situation of pump is very complicated.
Therefore, vacuum pump of the prior art, because there is open defect in the rotor axial location, therefore, the situation that the both ends of the surface that rotor often takes place lost efficacy with protecgulum end face and the motion of dividing plate end face respectively, promptly because Destructive wear appears in improper these place's parts that cause in gap, and then cause pump extraordinary noise to occur, when more serious, pump will produce operation stuck (embracing car), the phenomenon of chain pernicious damage parts such as burn-down of electric motor, make troubles to user's use, the user is caused damage, simultaneously, bring loss also can for the prestige of pump manufacturer man.
The model utility content
(1) technical problem that will solve
The technical problems to be solved in the utility model is to improve vacuum pump reliability of operation and stability.
(2) technological scheme
For this reason, the utility model provides a kind of axial float positioning device for rotor shaft of vacuum pump, comprising:
Rotor, described rotor center is provided with through hole, and the two ends of described rotor are provided with concave station;
Rotor shaft comprises the optical axis that is set in the described through hole, and the position corresponding to a described concave station on the described optical axis is provided with boss;
Dividing plate bearing and Front Cover Bearing are set in the two ends of described rotor shaft respectively, are connected movingly with the two ends of described rotor shaft respectively;
The dividing plate that is connected with the stationary fit of described dividing plate bearing, with the protecgulum that the Front Cover Bearing stationary fit is connected, described dividing plate end face is connected with the both ends of the surface of described rotor respectively movingly with the protecgulum end face.
Wherein, the surface of the through hole of described rotor is provided with breakthrough form first keyway along rotor axial, and described optical axis outer surface axially is provided with second keyway along optical axis.
Also comprise: key, a part are arranged in described breakthrough form first keyway, and another part is arranged in described second keyway.
Also comprise: be set in the cylinder body of described rotor outside, described cylinder body, protecgulum and dividing plate use screw to be fastenedly connected.
The shoulder face of described boss is connected movingly with the end face of described dividing plate bearing.
Described key is connected with the second keyway stationary fit, and described key is connected movingly with breakthrough form first keyway.
The through hole of described rotor is connected movingly with the optical axis of described rotor shaft.
Described dividing plate bearing is a sliding bearing, or rolling bearing.
Described Front Cover Bearing is a sliding bearing, or rolling bearing.
(3) beneficial effect
The axial float positioning device for rotor shaft of vacuum pump that the utility model provides, by rotor and rotor shaft separately are designed to two independently parts, and rotor shaft configuration boss structure, make rotor shaft under the effect of atmospheric pressure, its protruding circular bead surface is realized being connected movingly with the dividing plate bearing face, make the gap between two ends of rotor face and dividing plate end face and the protecgulum end face realize impartial, thereby realize the unsteady location of rotor axial, avoided because improper component wear that causes in gap and extraordinary noise, reduced the rate of fault of pump operation, reduce vibration, greatly improved the reliability and stability of pump operation, thereby prolonged the working life of pump; Greatly reduce the maintenance and repair cost of pump simultaneously, realized high-effect, the low power consuming of product.
Description of drawings
Fig. 1 is an axial direction positioning device structural representation of the prior art;
Fig. 2 is the structure sectional view at A-A shown in Figure 1 place;
Fig. 3 is the axial float positioning device for rotor shaft of vacuum pump structural representation according to a kind of mode of execution of the utility model;
Fig. 4 is the structure sectional view at A-A shown in Figure 3 place.
Wherein, 1: dividing plate; 2: the dividing plate bearing; 3: cylinder body; 4: rotor shaft; 5: key; 6: screw; 7: rotor; 8: protecgulum; 9: Front Cover Bearing.
Embodiment
Below in conjunction with drawings and Examples, embodiment of the present utility model is described in further detail.Following examples are used to illustrate the utility model, but are not used for limiting scope of the present utility model.
As shown in Figure 3, be axial float positioning device for rotor shaft of vacuum pump structural representation according to a kind of mode of execution of the utility model, combination is referring to shown in Figure 4 again, be the section of structure at A-A shown in Figure 3 place, this device comprises: rotor 7, rotor shaft 4, dividing plate bearing 2, Front Cover Bearing 9, dividing plate 1 and protecgulum 8.
Wherein, rotor 7 is provided with through hole, and this through hole is accurate through hole, and the two ends of rotor 7 respectively are provided with a concave station; Rotor shaft 4 comprises the optical axis that is set in the through hole, and this optical axis is accurate optical axis, and the position corresponding to a concave station on the optical axis is provided with boss; Dividing plate 1 is connected with 2 stationary fits of dividing plate bearing, and protecgulum 8 is connected with Front Cover Bearing 9 stationary fits, and the endoporus of dividing plate bearing 2 and Front Cover Bearing 9 is set in the two ends of rotor shaft 4 respectively, and dividing plate bearing 2 is connected movingly with the two ends of Front Cover Bearing 9 respectively at rotor shaft 4; Dividing plate 1 end face, protecgulum 8 end faces are connected movingly with two end faces of rotor 7 respectively.
Present embodiment also comprises key 5, is used to connect rotor 7 and rotor shaft 4; The through hole of rotor 7 is provided with breakthrough form first keyway along rotor 7 axial directions, and the optical axis of rotor shaft 4 is provided with second keyway along the optical axis axial direction, and the shape of the shape of second keyway and key 5 adapts; The position of second keyway is corresponding with the position of first keyway; Key 5 is connected with the second keyway stationary fit, then rotor 7 is connected movingly with rotor shaft 4, another part of key 5 is arranged in breakthrough form first keyway naturally, is connected movingly with first keyway; Key 5 can be singly-bound, also can be spline.
This device also comprises: cylinder body 3.Wherein cylinder body 3 is set in the outside of rotor 7, and cylinder body 3, protecgulum 8 and dividing plate 1 are fastenedly connected by screw 6, and cylinder body 3 is connected with the stationary fit that is connected between protecgulum 8 and the dividing plate 1.The shoulder face of the boss of rotor shaft 4 is connected movingly with the end face of dividing plate bearing 2, is used to finish the axially locating effect of rotor shaft 4.
In the present embodiment, the concave station at rotor 7 two ends, be arranged on dividing plate 1 side one is the structure needs that the boss with rotor shaft 4 is connected, and a concave station that is arranged on protecgulum 8 sides is because the blade of vacuum pump moves in rotor blade groove, for balance frictional force is provided with.
In the present embodiment, Front Cover Bearing 9 and dividing plate bearing 2 can be the sliding bearing form, also can be the rolling bearing form, when dividing plate bearing 2 is the sliding bearing form, the inner hole sleeve of dividing plate bearing 2 is located on the optical axis of rotor shaft 4, and a side end face of dividing plate bearing 2 is connected movingly with the shoulder face of the boss of rotor shaft 4, and the shoulder face of this boss is a precision machined surface, the part easy to wear of rotor shaft 4 is done heat treatment, makes it to have harder hardness.All connection parts in the present embodiment are the precision machining manufacturing.
In the present embodiment, because rotor shaft 4 one ends are in the atmosphere, and the other end is in the vacuum, so rotor shaft 4 is subjected to atmospheric pressure as shown in Figure 3, be that rotor shaft 4 is subjected to the end thrust of force direction as shown in Figure 3, the protruding circular bead surface of rotor shaft 4 is finished movingly with the end face of dividing plate bearing 2 to be connected, thereby realize the axially locating of rotor shaft 4, rotor 7 floats about can prolonging axially on the rotor shaft 4, thereby realize the different periods of pump operation process, comprise after startup, intensification, the thermal equilibrium etc.Gap between the end face of rotor 7 both ends of the surface and dividing plate 1, the end face of protecgulum 8 is in state of equalization all the time.Rotor 7 is connected with the accurate optical axis of rotor shaft 4 movingly with the accurate through hole in center, rotor 7 is connected by key 5 with rotor shaft 4 eliminates rotary freedom, like this rotor 7 can prolong on the rotor shaft 4 rotor shaft 4 axially about float, this external rotor 7 is connected by key 5 with rotor shaft 4, passes the effect of torque to rotor 7 to realize rotor shaft 4.
In the present embodiment, rotor 7 can prolong the unsteady location of axial realization of rotor shaft 4, concrete position fixing process is: at first, the axial dimension of cylinder body 3 is greater than the axial dimension of rotor 7, after the installation, naturally there is the gap between the end face of the end face of the both ends of the surface of rotor 7 and dividing plate 1 and protecgulum 8, after the vacuum pump running, because the lubrication of pumping fluid, certainly exist lubricant film in the gap of the end face of rotor 7 both ends of the surface and dividing plate 1 and the end face of protecgulum 8, at this moment, if two place's axial clearances are unequal, the oil film at two places will form pressure reduction in rotor 7 both sides, thereby promote rotor 7 by the big side shaft of the little sideshake in gap to floating, till two place's oil film pressure balances, rotor 7 is finished the axial float position fixing process, at this moment, rotor 7 both ends of the surface respectively with dividing plate 1 end face, the matching gap of protecgulum 8 end faces realizes impartial.
The utility model axial float positioning device for rotor shaft of vacuum pump, compare with prior art vacuum pump axial direction positioning device, has tangible difference, in the pump rotor structure of the prior art, rotor shaft and rotor are same parts, and the rotor of the utility model pump rotor axial float device and rotor shaft are two separate parts, therefore, rotor shaft of the present utility model can be heat-treated separately, when having avoided prior art to rotor shaft heat treatment, to the harmful effect of rotor dimensional accuracy.
The axial float positioning device for rotor shaft of vacuum pump that the utility model provides, by rotor and rotor shaft are separately designed, make the gap between two ends of rotor face and dividing plate end face and the protecgulum end face realize impartial, thereby realize the unsteady location of rotor axial, avoided having reduced the rate of fault of pump operation, reduced vibration owing to improper component wear that causes in gap and extraordinary noise, greatly improve the reliability and stability of pump operation, thereby prolonged the working life of pump; And greatly reduce the maintenance and repair cost of pump.High-effect, the low power consuming of product have been realized.
The meaning of the axial float positioning device for rotor shaft of vacuum pump that the utility model provides: in the vacuum pump technology development process, because historical reasons, the great structure innovation of against vacuum pump technological progress, for a long time, nearly all finished by the foreigner, compatriots lie down, the axial float positioning device for rotor shaft of vacuum pump that the utility model provides, made contribution just in this respect, we can say that this is a great structure innovation that promotes the vacuum pump technology progress.
The above only is a preferred implementation of the present utility model; should be understood that; for those skilled in the art; under the prerequisite that does not break away from the utility model know-why; can also make some improvement and modification, these improve and modification also should be considered as protection domain of the present utility model.
Claims (9)
1. an axial float positioning device for rotor shaft of vacuum pump is characterized in that, comprising:
Rotor, described rotor center is provided with through hole, and the two ends of described rotor are provided with concave station;
Rotor shaft comprises the optical axis that is set in the described through hole, and the position corresponding to a described concave station on the described optical axis is provided with boss;
Dividing plate bearing and Front Cover Bearing are set in the two ends of described rotor shaft respectively, are connected movingly with the two ends of described rotor shaft respectively;
The dividing plate that is connected with the stationary fit of described dividing plate bearing, with the protecgulum that the Front Cover Bearing stationary fit is connected, described dividing plate end face is connected with the both ends of the surface of described rotor respectively movingly with the protecgulum end face.
2. axial float positioning device for rotor shaft of vacuum pump as claimed in claim 1 is characterized in that, the surface of the through hole of described rotor is provided with breakthrough form first keyway along rotor axial, and described optical axis outer surface axially is provided with second keyway along optical axis.
3. axial float positioning device for rotor shaft of vacuum pump as claimed in claim 2 is characterized in that, also comprises: key, a part are arranged in described breakthrough form first keyway, and another part is arranged in described second keyway.
4. axial float positioning device for rotor shaft of vacuum pump as claimed in claim 1 is characterized in that, also comprises: be set in the cylinder body of described rotor outside, described cylinder body, protecgulum and dividing plate use screw to be fastenedly connected.
5. axial float positioning device for rotor shaft of vacuum pump as claimed in claim 1 is characterized in that, the shoulder face of described boss is connected movingly with the end face of described dividing plate bearing.
6. axial float positioning device for rotor shaft of vacuum pump as claimed in claim 3 is characterized in that, described key is connected with the second keyway stationary fit, and described key is connected movingly with breakthrough form first keyway.
7. as arbitrary axial float positioning device for rotor shaft of vacuum pump as described in the claim 1～6, it is characterized in that the through hole of described rotor is connected movingly with the optical axis of described rotor shaft.
8. axial float positioning device for rotor shaft of vacuum pump as claimed in claim 1 is characterized in that, described dividing plate bearing is a sliding bearing, or rolling bearing.
9. axial float positioning device for rotor shaft of vacuum pump as claimed in claim 1 is characterized in that, described Front Cover Bearing is a sliding bearing, or rolling bearing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202695958U CN201779017U (en) | 2010-07-21 | 2010-07-21 | Vacuum pump rotor axial floating positioning device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202695958U CN201779017U (en) | 2010-07-21 | 2010-07-21 | Vacuum pump rotor axial floating positioning device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201779017U true CN201779017U (en) | 2011-03-30 |
Family
ID=43792229
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010202695958U Expired - Lifetime CN201779017U (en) | 2010-07-21 | 2010-07-21 | Vacuum pump rotor axial floating positioning device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201779017U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101865135A (en) * | 2010-07-21 | 2010-10-20 | 北京北仪创新真空技术有限责任公司 | Axial float positioning device for rotor shaft of vacuum pump |
-
2010
- 2010-07-21 CN CN2010202695958U patent/CN201779017U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101865135A (en) * | 2010-07-21 | 2010-10-20 | 北京北仪创新真空技术有限责任公司 | Axial float positioning device for rotor shaft of vacuum pump |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20110330 Effective date of abandoning: 20120111 |