CN204877936U - Pressure ratio screw vacuum pump in variable - Google Patents
Pressure ratio screw vacuum pump in variable Download PDFInfo
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- CN204877936U CN204877936U CN201520586782.1U CN201520586782U CN204877936U CN 204877936 U CN204877936 U CN 204877936U CN 201520586782 U CN201520586782 U CN 201520586782U CN 204877936 U CN204877936 U CN 204877936U
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- pressure ratio
- variable
- vacuum pump
- inner pressure
- screw vacuum
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Abstract
The utility model provides a vacuum pump, in particular to pressure ratio screw vacuum pump in variable belongs to screw vacuum pump technical field, power rotor, driven rotor in the pump body and the pump body, the helicla flute on power rotor, the driven rotor forms sealed chamber with pump body inner wall, and a variable guard housing sets up at sealed chamber exhaust end, is equipped with 2 at least exhaust holes on it, a case, the rotatable installation in variable guard housing is equipped with on the case and closes the closing plate with the hole complex that exhausts, and rotation driving device is connected in the case outside. The utility model discloses can high vacuum degree operation requirement can be satisfied according to pressure ratio size in the real work condition automatic adjustment, simultaneously, the energy consumption is reduced by a wide margin.
Description
Technical field
The utility model designs a kind of vacuum pump, and particularly the variable inner pressure ratio screw vacuum pump of one, belongs to screw vacuum pump technical field.
Background technique
Screw vacuum pump is through strict dynamic balance calibration, the screw rod that does to support with bearing two, be arranged in pump chamber, two screw rods engage each other, and the spiral chute on screw rod forms with accommodation spiral fluted inwall the Seal cage be connected to each other one by one, during running, synchronous high-speed counterrotating done by two rotors in pump chamber, along with the continuous rotation of screw rod, and the continuous forward of Seal cage, air is sucked by intakeport, push through Seal cage, discharged by relief opening, vacuumize thus.
The inner pressure ratio of screw vacuum pump is relevant with suction and exhaust ports, screw molded lines etc., and inner pressure ratio is higher, and vacuum capability is stronger.When intakeport, screw molded lines are determined, inner pressure ratio is generally determined by the size adjustment of relief opening, and relief opening is larger, and inner pressure ratio is lower, and relief opening is less, and inner pressure ratio is higher.
During screw vacuum pump real work, in the starting stage, due to low vacuum, as adopted high inner pressure ratio vacuum pump, its energy consumption is very high, therefore, now more applicable low inner pressure ratio vacuum pump, air displacement is large, and working efficiency is high, and improves constantly along with degree of vacuum, low inner pressure ratio vacuum pump efficiency declines rapidly, now, more applicable high inner pressure ratio vacuum pump, gas clean-up.And existing screw vacuum pump is and determines inner pressure ratio, in order to take into account whole working procedure, normally determining a suitable inner pressure ratio, taking into account energy consumption and vacuum level requirements.Therefore, be difficult to obtain large breakthrough in energy consumption and degree of vacuum.
Model utility content
According to above the deficiencies in the prior art, technical problem to be solved in the utility model is: provide a kind of variable inner pressure ratio screw vacuum pump, can automatically adjust inner pressure ratio size, can meet condition of high vacuum degree usage requirement according to real work situation, meanwhile, significantly energy consumption is reduced.
Variable inner pressure ratio screw vacuum pump described in the utility model, comprise the power rotor in the pump housing and the pump housing, driven rotor, the spiral chute on power rotor, driven rotor and pump housing inwall form Seal cage, a variable guard housing, be arranged on Seal cage exhaust end, which is provided with at least 2 exhaust ports; One spool, is rotatablely arranged in variable guard housing, and spool is provided with the closing plate coordinated with exhaust port, connects rotating driving device outside spool.
Variable guard housing is provided with the exhaust port of multiple different Throughput, and spool matches with variable guard housing, drives spool and closing plate to rotate, thus can close exhaust port by rotating driving device.Along with closing of exhaust port, inner pressure ratio will change thereupon, and the gross exhaust gas of exhaust port is larger, and inner pressure ratio is less, and the gross exhaust gas of exhaust port is less, and inner pressure ratio is higher.Inner pressure ratio coordinates the usage requirement of actual conditions to adjust, and uses low inner pressure ratio under can meeting rough vacuum situation, reduces energy consumption, uses high inner pressure ratio, the requirement of gas clean-up under meeting again condition of high vacuum degree situation.
Described variable guard housing comprises inner convex platform, outer lug boss and connects the annular bottom plate of inner convex platform, outer lug boss, and exhaust port is arranged on base plate, and is evenly arranged along base plate circumference.
Described exhaust port is circular, ellipse, polygonal or long strip, or two ends are semicircle, the middle long arc shape connected by camber line.
Described exhaust port has consistent rotation direction.
Described spool comprises interior land, outer land, closing plate and through hole area are set in the annular region between interior land and outer land, interior land is enclosed within outside inner convex platform, and outer land is inserted inside outer lug boss, and the outside of outer land is provided with gear, the outer lug boss of corresponding variable guard housing is provided with fitting seat, one worm screw is arranged in fitting seat, and matches with gear, by the rotation of worm screw, drive Spool rotating, realize closing plate opening and closing motion exhaust port.
In described through hole area, interval arranges stiffening rib, and the bottom surface of stiffening rib is higher than the bottom surface of closing plate, and stiffening rib increases spool intensity, avoids the exhaust affecting exhaust port simultaneously.
On the base plate of described variable guard housing, last exhaust port side is provided with position limit pin, this position limit pin limits the maximum unlatching of closing plate and minimum open limit, make when closing plate moves to maximum open position, all exhaust ports are opened, when closing plate moves to minimal open position, only last exhaust port is opened, the running position of closing plate, by controlling the motor of drive unit, position limit pin is spacing mechanically.
Described worm screw connects actuating motor, and actuating motor connection control system, is provided with pressure sensor device in the pump housing, pressure sensor device connection control system.
Working procedure:
Under original state, the low vacuum of working environment, closing plate is opened to maximum position, and all exhaust ports are all opened, and gross exhaust gas is maximum, and now, the inner pressure ratio of equipment is low, and coordinate the environment of rough vacuum, while meeting usage requirement, energy consumption drops to minimum.Along with the raising of environment vacuum degree, pressure sensor device detects the pressure change in the pump housing, and control system controls actuating motor action, driven by servomotor worm screw makes Spool rotating, closing plate is progressively by vent closure, and the inner pressure ratio of equipment progressively raises, to meet the requirement to degree of vacuum.When running to the last stage, closing plate is opened to minimum position, only retains a minimum exhaust port, until finish the work.
Compared with prior art, the beneficial effect that the utility model has is:
This variable inner pressure ratio screw vacuum pump can adjust the inner pressure ratio size of equipment according to working condition, according to vacuum condition, select most suitable inner pressure ratio, at utmost reduce energy consumption, overall power consumption declines to a great extent, and energy-conservationly reaches more than 50%, simultaneously, meet more condition of high vacuum degree usage requirement, improve overall working efficiency.
Accompanying drawing explanation
Fig. 1 is the utility model sectional view;
Fig. 2 is power rotor, driven rotor coordinates schematic diagram;
Fig. 3 is driven rotor assembling exploded view;
Fig. 4 is variable guard housing plan view;
Fig. 5 is spool plan view.
In figure: 1, the pump housing; 2, driven rotor; 3, power rotor; 4, variable guard housing; 5, worm screw; 6, spool gland; 7, spool; 8, apron plate; 4.1, fitting seat; 4.2, exhaust port; 4.3, position limit pin; 4.4, base plate; 4.5, inner convex platform; 4.6, outer lug boss; 7.1, gear; 7.2, closing plate; 7.3, through hole area; 7.4 stiffening rib; 7.5, interior land; 7.6, outer land.
Embodiment
Below in conjunction with accompanying drawing, embodiment of the present utility model is described further.
As shown in Figures 1 to 3, this variable inner pressure ratio screw vacuum pump, comprise the power rotor 3 in the pump housing 1 and the pump housing 1, driven rotor 2, spiral chute on power rotor 3, driven rotor 2 and the pump housing 1 inwall form Seal cage, the screw rod of power rotor 3 connects external driver device, and power rotor 3 is connected by gear mechanism with the other end of driven rotor 2.Seal cage one end is inlet end, the other end is exhaust end, the exhaust end of Seal cage arranges apron plate 8 and variable guard housing 4, apron plate 8 is arranged on power rotor 3, variable guard housing 4 is arranged on driven rotor 2, arranges a rotatable spool 7, spool 7 is arranged a spool gland 6 in variable guard housing 4, spool gland 6 is bolted on variable guard housing 4, connects rotating driving device outside spool 7.
As shown in Figure 4, variable guard housing 4 comprises inner convex platform 4.5, outer lug boss 4.6 and connects the annular bottom plate 4.4 of inner convex platform 4.5, outer lug boss 4.6, and inner convex platform 4.5 is enclosed within screw rod, and outer lug boss 4.6 is provided with bolt hole, outer lug boss 4.6 side be provided with fitting seat 4.1, for installing worm screw 5.Base plate 4.4 is provided with the different exhaust port 4.2 of at least 2 Throughputs, the quantity of exhaust port 4.2 can arrange multiple according to actual conditions, as arranged 6,8,10,20 etc., exhaust port 4.2 can be the various shapes such as circle, ellipse, polygonal or long strip, the preferred two ends of the present embodiment are semicircle, the middle long arc shape connected by camber line, this long arc shape exhaust port 4.2 has consistent rotation direction, and is evenly arranged along base plate 4.4 circumference.The size of exhaust port 4.2 can be identical, also can be different, it puts in order and can arrange by size, also can free arrangement, it is minimum exhaust port that the present embodiment arranges last exhaust port 4.2, this minimum exhaust port 4.2 side is provided with position limit pin 4.3, this position limit pin 4.3 limits the maximum unlatching of closing plate 7.2 and minimum open limit, make when closing plate 7.2 moves to maximum open position, all exhaust ports 4.2 are opened, when closing plate 7.2 moves to minimal open position, only this minimum exhaust port 4.2 is opened.
As shown in Figure 5, spool 7 comprises interior land 7.5, outer land 7.6, closing plate 7.2 and through hole area 7.3 are set in the annular region between interior land 7.5 and outer land 7.6, interior land 7.5 is enclosed within outside inner convex platform 4.5, outer land 7.6 is inserted inside outer lug boss 4.6, the outside of outer land 7.6 is provided with gear 7.1, and gear 7.1 coordinates with the worm screw 5 be arranged in fitting seat 4.1.In through hole area 7.3, interval arranges stiffening rib 7.4, and the bottom surface of stiffening rib 7.4 is higher than the bottom surface of closing plate 7.2.
Rotating driving device comprises worm screw 5, and worm screw 5 connects actuating motor, and this actuating motor can control worm screw 5 forward and counterrotating, actuating motor connection control system, and control system is Bonding pressure sensing device also, and pressure sensor device is arranged in the pump housing 1.Adjusted the aperture of closing plate 7.2 by control system at any time, thus realize the variable adjustment to inner pressure ratio.
Working procedure:
Under original state, the low vacuum of working environment, closing plate 7.2 is opened to maximum position, and all exhaust ports 4.2 are all opened, and gross exhaust gas is maximum, and now, the inner pressure ratio of equipment is low, and coordinate the environment of rough vacuum, while meeting usage requirement, energy consumption drops to minimum.Along with the raising of environment vacuum degree, pressure sensor device detects the pressure change in the pump housing 1, control system controls actuating motor action, driven by servomotor worm screw 5 makes spool 7 rotate, exhaust port 4.2 is progressively closed by closing plate 7.2, the inner pressure ratio of equipment progressively raises, to meet the requirement to degree of vacuum.When running to the last stage, closing plate 7.2 is opened to minimum position, only retains a minimum exhaust port 4.2, until finish the work.
Claims (8)
1. a variable inner pressure ratio screw vacuum pump, comprise the power rotor (3) in the pump housing (1) and the pump housing (1), driven rotor (2), spiral chute on power rotor (3), driven rotor (2) and the pump housing (1) inwall form Seal cage, it is characterized in that:
One variable guard housing (4), is arranged on Seal cage exhaust end, which is provided with at least 2 exhaust ports (4.2);
One spool (7), rotatablely be arranged in variable guard housing (4), spool (7) is provided with the closing plate (7.2) coordinated with exhaust port (4.2), and spool (7) outside connects rotating driving device.
2. variable inner pressure ratio screw vacuum pump according to claim 1, it is characterized in that: described variable guard housing (4) comprises inner convex platform (4.5), outer lug boss (4.6) and connects the annular bottom plate (4.4) of inner convex platform (4.5), outer lug boss (4.6), exhaust port (4.2) is arranged on base plate (4.4), and is evenly arranged along base plate (4.4) circumference.
3. variable inner pressure ratio screw vacuum pump according to claim 1 and 2, is characterized in that: described exhaust port (4.2) is circular, ellipse, polygonal or long strip, or two ends are semicircle, the middle long arc shape connected by camber line.
4. variable inner pressure ratio screw vacuum pump according to claim 3, is characterized in that: described exhaust port (4.2) has consistent rotation direction.
5. variable inner pressure ratio screw vacuum pump according to claim 2, it is characterized in that: described spool (7) comprises interior land (7.5), outer land (7.6), closing plate (7.2) and through hole area (7.3) are set in the annular region between interior land (7.5) and outer land (7.6), interior land (7.5) is enclosed within inner convex platform (4.5) outside, outer land (7.6) inserts outer lug boss (4.6) inner side, the outside of outer land (7.6) is provided with gear (7.1), the outer lug boss (4.6) of corresponding variable guard housing (4) is provided with fitting seat (4.1), one worm screw (5) is arranged in fitting seat (4.1), and match with gear (7.1).
6. variable inner pressure ratio screw vacuum pump according to claim 5, it is characterized in that: described through hole area (7.3) interior interval arranges stiffening rib (7.4), the bottom surface of stiffening rib (7.4) is higher than the bottom surface of closing plate (7.2).
7. variable inner pressure ratio screw vacuum pump according to claim 5, it is characterized in that: on the base plate (4.4) of described variable guard housing (4), last exhaust port (4.2) side is provided with position limit pin (4.3), this position limit pin (4.3) limits closing plate (7.2) maximum unlatching and minimum open limit, make when closing plate (7.2) moves to maximum open position, all exhaust ports (4.2) are opened, when closing plate (7.2) moves to minimal open position, only last exhaust port (4.2) is opened.
8. variable inner pressure ratio screw vacuum pump according to claim 5, it is characterized in that: described worm screw (5) connects actuating motor, actuating motor connection control system, the pump housing is provided with pressure sensor device in (1), pressure sensor device connection control system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520586782.1U CN204877936U (en) | 2015-08-06 | 2015-08-06 | Pressure ratio screw vacuum pump in variable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520586782.1U CN204877936U (en) | 2015-08-06 | 2015-08-06 | Pressure ratio screw vacuum pump in variable |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204877936U true CN204877936U (en) | 2015-12-16 |
Family
ID=54822315
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520586782.1U Withdrawn - After Issue CN204877936U (en) | 2015-08-06 | 2015-08-06 | Pressure ratio screw vacuum pump in variable |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204877936U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105003435A (en) * | 2015-08-06 | 2015-10-28 | 山东伯仲真空设备股份有限公司 | Screw vacuum pump with internal pressure ratio changeable |
| CN106996372A (en) * | 2016-01-25 | 2017-08-01 | 中联重科股份有限公司 | The stator of screw pump and the determination methods, devices and systems of rotor size |
| GB2618353A (en) * | 2022-05-05 | 2023-11-08 | Atlas Copco Airpower Nv | Rotor assembly |
-
2015
- 2015-08-06 CN CN201520586782.1U patent/CN204877936U/en not_active Withdrawn - After Issue
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105003435A (en) * | 2015-08-06 | 2015-10-28 | 山东伯仲真空设备股份有限公司 | Screw vacuum pump with internal pressure ratio changeable |
| CN105003435B (en) * | 2015-08-06 | 2017-05-31 | 山东伯仲真空设备股份有限公司 | Variable inner pressure ratio screw vacuum pump |
| CN106996372A (en) * | 2016-01-25 | 2017-08-01 | 中联重科股份有限公司 | The stator of screw pump and the determination methods, devices and systems of rotor size |
| CN106996372B (en) * | 2016-01-25 | 2018-11-16 | 中联重科股份有限公司 | The stator of screw pump and the determination methods, devices and systems of rotor size |
| GB2618353A (en) * | 2022-05-05 | 2023-11-08 | Atlas Copco Airpower Nv | Rotor assembly |
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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 | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20151216 Effective date of abandoning: 20170531 |