CN203743039U - Gap adjusting device for two-stage vacuum pump - Google Patents
Gap adjusting device for two-stage vacuum pump Download PDFInfo
- Publication number
- CN203743039U CN203743039U CN201420134067.XU CN201420134067U CN203743039U CN 203743039 U CN203743039 U CN 203743039U CN 201420134067 U CN201420134067 U CN 201420134067U CN 203743039 U CN203743039 U CN 203743039U
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- bearing
- stage
- spues
- bearing support
- pump
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- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The utility model discloses a gap adjusting device for a two-stage vacuum pump, and relates to the technical field of vacuum pumps. The two-stage vacuum pump comprises a first-stage pump body, a second-stage pump body, an intermediate thrust plate, a pump shaft, a first-stage impeller, a second -stage impeller, an inhalation body, a exhalation body and bearing bodies. An axial bearing sliding gap is reserved between a drive-end bearing gland on one side of the inhalation body and a drive-end bearing. A bearing on one side of the exhalation body is axially fixed on the pump shaft. A non-drive end bearing gland on one side of the exhalation body is provided with an adjusting threaded hole and a fastening hole. An adjusting bolt is arranged in the adjusting threaded hole. The threaded rod of the position, between the head of the adjusting bolt and the non-drive end bearing gland, of the adjusting bolt is provided with a positioning nut. The position, opposite to the fastening hole, of the bearing body on one side of the exhalation body is provided with a fastening threaded hole. An elastic spacer is arranged between the inner side of the outer ring of the bearing on one side of the exhalation body and the corresponding bearing body. The gap adjusting device is simple in structure, convenient to adjust and capable of accurately adjusting a gap, so that the two-stage vacuum pump is high in performance and long in service life.
Description
Technical field
The present invention relates to two-stage vacuum pump technical field, say in detail it is a kind of simple in structure, easy to adjust, can fine adjustment one-level impeller, sencond stage impeller and suction body, the gap that spues between body and middle thrust plate, make that two-stage vacuum pump performance is high, long service life two-stage vacuum pump lash adjusting device.
Background technique
We know that existing two-stage vacuum pump comprises first-stage pump body, second-stage pump body, middle thrust plate, pump shaft, one-level impeller, sencond stage impeller, suction body, body and bearing support spue, pump shaft is established in tubular first-stage pump body and second-stage pump body, middle thrust plate is arranged on (first-stage pump body left side and second-stage pump body right side) between first-stage pump body and second-stage pump body, on pump shaft, be provided with impeller separate spacers with middle thrust plate opposite position, between middle thrust plate and impeller separate spacers, be provided with packing seal, one-level impeller, sencond stage impeller is separated by by impeller separate spacers, be separately fixed in first-stage pump body and second-stage pump body through the shaft shoulder and impeller set screw nut, suction body is located at first-stage pump body right side, the body that spues is located at first-stage pump body left side, suction body, first-stage pump body, middle thrust plate, be abutted against successively on second-stage pump body and body to the dextrad left side that spues, through suction body, the bolt block and the lock bolt that spue on body are fastening, press integral.On suction body right side and on the body left side that spues, be respectively equipped with bearing support, pump shaft is arranged on bearing support through bearing, between bearing support and pump shaft, be provided with machine envelope, the bearing support of suction body one side is provided with drive end axle pressure cap, and the bearing support of body one side that spues is provided with non-driven-end bearing gland.Suction body is provided with intakeport and relief opening, and the body that spues is provided with intakeport and relief opening, and the relief opening of suction body is communicated with through connecting tube with the intakeport of the body that spues.When use, motor is connected with the pump shaft stretching out from drive end axle pressure cap through coupling, drives two-stage vacuum pump work.
The impeller of two-stage vacuum pump often rotates a circle and just completes once air-breathing and exhaust work, there is high pressure Exhaust Gas for one week and sucking low-pressure gas at impeller, only have and kept one-level impeller and sencond stage impeller respectively and suction body, the gap that spues between body and middle thrust plate, two-stage vacuum pump could long-time Efficient Operation.And existing two-stage vacuum pump structure, one-level impeller, sencond stage impeller and suction body, the gap that spues between body and middle thrust plate by production size determine, cannot fine adjustment, due to the error of each parts production size, one-level impeller, sencond stage impeller and suction body, spuing between body and middle thrust plate easily there is the problem of friction or excesssive gap, fragile, performance is low.When pump operation a period of time, while causing between above-mentioned parts because of reasons such as wearing and tearing, corrosion that gap changes, the working efficiency of two-stage vacuum pump step-down gradually, working life is low short.
Summary of the invention
The object of the invention is to solve above-mentioned the deficiencies in the prior art, provide a kind of simple in structure, easy to adjust, can fine adjustment one-level impeller, sencond stage impeller and suction body, the gap that spues between body and middle thrust plate, make that two-stage vacuum pump performance is high, the two-stage vacuum pump lash adjusting device of long service life.
A kind of two-stage vacuum pump lash adjusting device, two-stage vacuum pump comprises first-stage pump body, second-stage pump body, middle thrust plate, pump shaft, one-level impeller, sencond stage impeller, suction body, body and bearing support spue, on suction body right side and on the body left side that spues, be respectively equipped with bearing support, pump shaft is arranged on bearing support through bearing, the bearing support that it is characterized in that suction body one side is provided with drive end axle pressure cap, drive end axle pressure cap is through being bolted on bearing support, between drive end axle pressure cap and drive end bearing, leave bearing axial sliding clearance, the bearing of body one side that spues is axially fixed on pump shaft, the bearing support of body one side that spues is provided with non-driven-end bearing gland, non-driven-end bearing gland is provided with and regulates screw and fastener hole, regulate in screw and be provided with adjusting bolt, adjusting bolt is through regulating screw to lean on bearing support, adjusting bolt screw rod between adjusting bolt head and non-driven-end bearing gland is provided with setscrew nut, on the bearing support of body one side that spues, be provided with fastening screw pit with fastener hole opposite position, clamping bolt coordinates the outside, outer ring that non-driven-end bearing gland is pressed against to the bearing of body one side that spues with fastening screw pit through fastener hole, between the bearing support of the inner side, outer ring of the bearing of body one side that spues and body one side that spues, be provided with resilient pad.
Resilient pad described in the present invention is wavy spring packing ring or butterfly spring packing ring, the amount of elastic deformation of resilient pad be not less than one-level impeller and suction body and one-level impeller and middle thrust plate distance and or the distance of sencond stage impeller and spue body and sencond stage impeller and middle thrust plate with.
On non-driven-end bearing gland described in the present invention, be provided with compression bulge loop with the outer ring opposite position of bearing of body one side that spues.Compress the interior compression of the bearing by body one side that spues of bearing support that bulge loop can embed body one side that spues.
In two-stage vacuum pump when assembling or using process, need to regulate one-level impeller, sencond stage impeller and suction body, while spuing distance between body and middle thrust plate, fastener hole by clamping bolt through non-driven-end bearing gland, coordinate non-driven-end bearing gland is killed with fastening screw pit, now one-level impeller, sencond stage impeller are compressed against respectively on suction body and middle thrust plate, and resilient pad is pressed on bearing support, occurs elastic strain by bearing; Setscrew nut is first installed in adjusting bolt, then adjusting bolt is coordinated and leaned on bearing support with adjusting screw; Screwed tightening fixing bolt completely, the bearing of body one side that spues, under the elastic force effect of resilient pad, drives one-level impeller, sencond stage impeller axial motion, and one-level impeller, sencond stage impeller are pressed against respectively on middle thrust plate and bump body.Now, the maximum adjusting play that the distance between adjusting bolt front-end face and bearing support is whole rotor, maximum adjusting play, in the scope of designing requirement, can ensure that the end clearance of every one-level impeller is within the scope of designing requirement.On the basis of above-mentioned steps, turn adjusting bolt, make its front-end face move forward to the half of total backlash, then adjusting bolt is locked on non-driven-end bearing gland with setscrew nut, finally with clamping bolt, bearing gland is fastening.
The present invention is simple in structure, easy to adjust, can fine adjustment one-level impeller, sencond stage impeller and suction body, the gap that spues between body and middle thrust plate, make that two-stage vacuum pump performance is high, long service life.
Brief description of the drawings
Fig. 1 is structural representation of the present invention.
Fig. 2 is the A place partial enlarged drawing of Fig. 1.
Fig. 3 is the B place partial enlarged drawing of Fig. 1.
Embodiment
Two-stage vacuum pump lash adjusting device as shown in the figure, two-stage vacuum pump comprises first-stage pump body 8, second-stage pump body 5, middle thrust plate 6, pump shaft 10, one-level impeller 9, sencond stage impeller 4, suction body 14, body 7 and bearing support spue, on suction body 14 right sides and on body 7 left sides that spue, be respectively equipped with bearing support 11, 3, bearing support is connected with the body that spues with suction body through bolt, pump shaft 10 is through bearing 1, 12 are arranged on bearing support, the bearing support 11 of suction body one side is provided with drive end axle pressure cap 13, drive end axle pressure cap 13 is through being bolted on bearing support, between drive end axle pressure cap 13 and drive end bearing 12, leave bearing axial sliding clearance 18, when drive end axle pressure cap is pressed on bearing support, bearing still can slide axially in bearing support, the bearing 1 of body one side that spues is axially fixed on pump shaft 10, as can be seen from the figure, bearing inner race is fixed on pump shaft through locking nut and shaft shoulder cooperation, the bearing support 3 of body one side that spues is provided with non-driven-end bearing gland 2, non-driven-end bearing gland 2 is provided with and regulates screw and fastener hole, regulate in screw and be provided with adjusting bolt 17, adjusting bolt 17 is through regulating screw to lean on bearing support 3, the screw rod of the adjusting bolt 17 between adjusting bolt 17 heads and non-driven-end bearing gland 2 is provided with setscrew nut 16, on the bearing support 3 of body one side that spues, be provided with fastening screw pit with fastener hole opposite position, fastener hole is threadless slide opening, clamping bolt 18 coordinates the outside, outer ring that non-driven-end bearing gland 2 is pressed against to the bearing 1 of body one side that spues with fastening screw pit through fastener hole, as can be seen from Figure 2, on non-driven-end bearing gland, be provided with compression bulge loop with the outer ring opposite position of bearing of body one side that spues, compress the interior compression of the bearing by body one side that spues of bearing support that bulge loop can embed body one side that spues.Between the bearing support 3 of the inner side, outer ring of the bearing 1 of body one side that spues and body one side that spues, be provided with resilient pad 15.Resilient pad is the one of wavy spring packing ring or butterfly spring packing ring, the amount of elastic deformation of resilient pad be not less than one-level impeller and suction body and one-level impeller and middle thrust plate distance and or the distance of sencond stage impeller and spue body and sencond stage impeller and middle thrust plate with.
In two-stage vacuum pump when assembling or using process, need to regulate one-level impeller, sencond stage impeller and suction body, while spuing distance between body and middle thrust plate, fastener hole by clamping bolt through non-driven-end bearing gland, coordinate non-driven-end bearing gland is killed with fastening screw pit, now one-level impeller, sencond stage impeller are compressed against respectively on suction body and middle thrust plate, and resilient pad is pressed on bearing support, occurs elastic strain by bearing; Setscrew nut is first installed in adjusting bolt, then adjusting bolt is coordinated and leaned on bearing support with adjusting screw; Screwed tightening fixing bolt completely, the bearing of body one side that spues, under the elastic force effect of resilient pad, drives one-level impeller, sencond stage impeller axial motion, and one-level impeller, sencond stage impeller are pressed against respectively on middle thrust plate and bump body.Now, the maximum adjusting play that the distance between adjusting bolt front-end face and bearing support is whole rotor, maximum adjusting play, in the scope of designing requirement, can ensure that the end clearance of every one-level impeller is within the scope of designing requirement.On the basis of above-mentioned steps, turn adjusting bolt, make its front-end face move forward to the half of total backlash, then adjusting bolt is locked on non-driven-end bearing gland with setscrew nut, finally with clamping bolt, bearing gland is fastening.
The present invention is simple in structure, easy to adjust, can fine adjustment one-level impeller, sencond stage impeller and suction body, the gap that spues between body and middle thrust plate, make that two-stage vacuum pump performance is high, long service life.
Claims (3)
1. a two-stage vacuum pump lash adjusting device, two-stage vacuum pump comprises first-stage pump body, second-stage pump body, middle thrust plate, pump shaft, one-level impeller, sencond stage impeller, suction body, body and bearing support spue, on suction body right side and on the body left side that spues, be respectively equipped with bearing support, pump shaft is arranged on bearing support through bearing, the bearing support that it is characterized in that suction body one side is provided with drive end axle pressure cap, drive end axle pressure cap is through being bolted on bearing support, between drive end axle pressure cap and drive end bearing, leave bearing axial sliding clearance, the bearing of body one side that spues is axially fixed on pump shaft, the bearing support of body one side that spues is provided with non-driven-end bearing gland, non-driven-end bearing gland is provided with and regulates screw and fastener hole, regulate in screw and be provided with adjusting bolt, adjusting bolt is through regulating screw to lean on bearing support, adjusting bolt screw rod between adjusting bolt head and non-driven-end bearing gland is provided with setscrew nut, on the bearing support of body one side that spues, be provided with fastening screw pit with fastener hole opposite position, clamping bolt coordinates the outside, outer ring that non-driven-end bearing gland is pressed against to the bearing of body one side that spues with fastening screw pit through fastener hole, between the bearing support of the inner side, outer ring of the bearing of body one side that spues and body one side that spues, be provided with resilient pad.
2. two-stage vacuum pump lash adjusting device according to claim 1, is characterized in that described resilient pad is wavy spring packing ring or butterfly spring packing ring.
3. two-stage vacuum pump lash adjusting device according to claim 1 and 2, is characterized in that on described non-driven-end bearing gland and the outer ring opposite position of the bearing of body one side that spues is provided with compression bulge loop.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420134067.XU CN203743039U (en) | 2014-03-25 | 2014-03-25 | Gap adjusting device for two-stage vacuum pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420134067.XU CN203743039U (en) | 2014-03-25 | 2014-03-25 | Gap adjusting device for two-stage vacuum pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203743039U true CN203743039U (en) | 2014-07-30 |
Family
ID=51342847
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420134067.XU Withdrawn - After Issue CN203743039U (en) | 2014-03-25 | 2014-03-25 | Gap adjusting device for two-stage vacuum pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203743039U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103821754A (en) * | 2014-03-25 | 2014-05-28 | 山东双轮埃姆科泵业有限公司 | Double stage vacuum pump clearance adjusting device |
| CN110319022A (en) * | 2019-06-06 | 2019-10-11 | 浙江理工大学 | The adjustable experiment test device in centrifugal pump front and rear cover plate gap |
-
2014
- 2014-03-25 CN CN201420134067.XU patent/CN203743039U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103821754A (en) * | 2014-03-25 | 2014-05-28 | 山东双轮埃姆科泵业有限公司 | Double stage vacuum pump clearance adjusting device |
| CN110319022A (en) * | 2019-06-06 | 2019-10-11 | 浙江理工大学 | The adjustable experiment test device in centrifugal pump front and rear cover plate gap |
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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: 20140730 Effective date of abandoning: 20160518 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |