CN202646011U - Double-stage mixing type roots vacuum pump - Google Patents

Double-stage mixing type roots vacuum pump Download PDF

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Publication number
CN202646011U
CN202646011U CN 201220281760 CN201220281760U CN202646011U CN 202646011 U CN202646011 U CN 202646011U CN 201220281760 CN201220281760 CN 201220281760 CN 201220281760 U CN201220281760 U CN 201220281760U CN 202646011 U CN202646011 U CN 202646011U
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CN
China
Prior art keywords
pump
chamber
rotor shaft
cavity
vacuum pump
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Active
Application number
CN 201220281760
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Chinese (zh)
Inventor
张汝华
韩强
刘延海
李晓芳
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ZIBO HUAZHONG VACUUM EQUIPMENT Ltd
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ZIBO HUAZHONG VACUUM EQUIPMENT Ltd
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Priority to CN 201220281760 priority Critical patent/CN202646011U/en
Application granted granted Critical
Publication of CN202646011U publication Critical patent/CN202646011U/en
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Abstract

The utility model belongs to the technical field of pumps, and in particular relates to a double-stage mixing type roots vacuum pump. The pump comprises a motor, a coupling, a front cover, a rear cover and a pump body. A middle partition board, a driving rotor shaft and a driven rotor shaft are arranged in the pump body, wherein the driving rotor shaft and a driven rotor shaft are parallely arranged. the motor is connected with the driving rotor shaft through the coupling, the driving rotor shaft is connected with the driven rotor shaft through a synchronous gear, the pump body is divided into a front cavity and a rear cavity by the middle partition board, a connection channel is arranged on the middle partition board, a pair of rotors is arranged in each cavity, each pair of rotors is perpendicularly installed on the driving rotor shaft and the driven rotor shaft, a cold air inlet is arranged on the rear cavity, an air exhaust opening of the rear cavity is connected with an inlet of a heat exchanger, and an outlet of the heat exchanger is communicated with the cold air inlet of the rear cavity through an air return pipeline. The vacuum pump integrates a single-stage roots vacuum pump and an air-cooling roots vacuum pump, improves limit vacuum, and is compact in structure, small in occupied area, small in energy consumption and obvious in energy conservation effect.

Description

The hybrid Roots pump of twin-stage
Technical field
The utility model relates to the hybrid Roots pump of a kind of twin-stage, belongs to the pump technical field.
Background technique
Roots pump (abbreviation Roots pump) is a kind of rotary vacuum pump, in the pump chamber of Roots pump, has the rotor of two figures of eight to be installed in mutual vertically on the pair of parallel axle, is each other reverse synchronous rotary motion of 1 a pair of gear band action by velocity ratio.Between rotor, between rotor and the pump housing endophragm, maintain certain gap, can realize high rotating speed operation.Roots pump has the higher speed of exhaust when hanging down inlet pressure, but it can not use separately, need to have a preevacuation pump to connect with it, when treating to be extracted into Roots pump and to allow inlet pressure by preevacuation pump by the pressure in the system of taking out, Roots pump just can be started working.But because Roots pump is a kind of vacuum pump without interior compression, compression ratio is very low usually, and pressure reduction is little, greatly about 2000 ~ 5000Pa, therefore need to join high-power preevacuation pump, and energy consumption is very large.Except above-mentioned points, in order to improve the ultimate vacuum of pump, usually select many Roots pump series connection are used, but so both can take than large space, the connection leak point of pipeline occurs easily again, so the utilization ratio of Roots pump is low, cost is high.
The model utility content
According to above deficiency of the prior art, the technical problems to be solved in the utility model is: provide a kind of compact structure, the hybrid Roots pump of twin-stage little, that cost is low and energy consumption is low takes up room.
The technological scheme that its technical problem that solves the utility model adopts is: the hybrid Roots pump of described twin-stage, comprise motor, coupling, protecgulum, bonnet and the pump housing, it is characterized in that: the power rotor axle that intermediate clapboard and pair of parallel are installed is set in the pump housing, the driven rotor axle, motor links to each other with the power rotor axle by coupling, the power rotor axle is connected with the driven rotor axle by synchromesh gear, before the pump housing is separated into by intermediate clapboard, latter two chamber, intermediate clapboard is provided with connecting passage, a pair of rotor is set in each chamber, every pair of orthogonal being installed on power rotor axle and the driven rotor axle of rotor, rear chamber is provided with the cold air import, the relief opening of rear chamber connects the import of heat exchanger, and the outlet of heat exchanger is communicated with the cold air import of rear chamber by returning air pipe.
In this vacuum pump, front chamber is equivalent to the common Roots pump of one-level, and rear chamber connects heat exchanger and forms air-cooled roots vacuum pump, becomes one by the one-level Roots pump is connected with air-cooled roots vacuum pump, improved the ultimate vacuum of pump, and compact structure, take up room little; The inner connection reduced the leakage rate of connecting pipeline between two pumps between two chambers, improved the performance index of unit, and has been conducive to making and the maintenance of unit, greatly reduces user cost; Rear chamber connects heat exchanger, can take away a large amount of heat of compression, and vacuum pump is played good cooling effect, pressure reduction is increased greatly, usually can reach 20000 ~ 80000Pa, therefore only need to be equipped with the fore pump that power is little, aeration quantity is little, energy consumption is little, thereby reaches good energy-saving effect.
In the utility model, owing to can have pressure reduction in front chamber and the rear chamber, therefore adopt following preferred version: between the suction port of the arbitrary position on the gas circuit between front chamber's relief opening and rear chamber's suction port and front chamber, pressure difference valve is set at front chamber's relief opening.By pressure difference valve portion gas is returned in the large front chamber, until the pressure of forward and backward chamber keeps balance.
The beneficial effect that the utility model has is:
This vacuum pump is connected the one-level Roots pump and is become one with air-cooled roots vacuum pump, improved the ultimate vacuum of pump, compact structure, take up room little, both improve the ultimate vacuum of pump, the internal structure of the pump housing is optimized, reduced the leakage rate of connecting pipeline between two pumps, performance index and the working efficiency of unit have been improved, reduce power consumption, be conducive to simultaneously making and the maintenance of unit, reduced the production and application cost; By connecting heat exchanger in rear chamber, increased pressure reduction, be equipped with little, the narrow-minded fore pump of power and get final product, energy consumption is little, and energy-saving effect is obvious.
Description of drawings
Fig. 1 is structural representation of the present utility model;
Fig. 2 is the structural representation of Fig. 1 middle pump body.
Among the figure: 1, coupling; 2, protecgulum; 3, the pump housing; 4, pressure difference valve; 5, bonnet; 6, relief opening; 7, return air pipe; 8, heat exchanger; 9, power rotor axle; 10, bearing; 11, rotor; 12, connecting passage; 13, intermediate clapboard; 14, rotor; 15, synchromesh gear; 16, synchromesh gear; 17, driven rotor axle; 18, rotor; 19, rear chamber; 20, front chamber; 21, rotor; 22, cold air import.
Embodiment
Below in conjunction with accompanying drawing embodiment of the present utility model is described further:
Such as Fig. 1, shown in 2, the hybrid Roots pump of twin-stage, comprise motor, coupling 1, protecgulum 2,5 and the pump housing 3, the power rotor axle 9 driven rotor axles 17 that intermediate clapboard 13 and pair of parallel are installed are set in the pump housing 3, motor links to each other with power rotor axle 9 by coupling 1, power rotor axle 9 is by synchromesh gear 15,16 are connected with driven rotor axle 17, before the pump housing 3 is separated into by intermediate clapboard 13, latter two chamber 20,19, intermediate clapboard 13 is provided with connecting passage 12, a pair of rotor 11 is set in the front chamber 20,21, rotor 11 and rotor 21 are mutually vertical and be installed in respectively on power rotor axle 9 and the driven rotor axle 17, a pair of rotor 14 is set in the rear chamber 19,18, rotor 14 and rotor 18 are mutually vertical and be installed in respectively on power rotor axle 9 and the driven rotor axle 17, rear chamber 19 is provided with cold air import 22, the relief opening 6 of rear chamber 19 connects the import of heat exchanger 8, and the outlet of heat exchanger 8 is communicated with the cold air import 22 of rear chamber 19 by returning air pipe 7.Except above-mentioned points, between the suction port of the arbitrary position on the gas circuit between front chamber's relief opening and rear chamber's suction port and front chamber, pressure difference valve 4 is set.
In this vacuum pump, front chamber 20 is equivalent to the one-level Roots pump, and rear chamber 19 connects heat exchanger 8 and forms air-cooled roots vacuum pump, becomes one by the one-level Roots pump is connected with air-cooled roots vacuum pump, improved the ultimate vacuum of pump, and compact structure, take up room little; The inner connection reduced the leakage rate of connecting pipeline between two pumps between two chambers, improved the performance index of unit, and has been conducive to making and the maintenance of unit, greatly reduces user cost; Rear chamber 19 connects heat exchanger 8, can take away a large amount of heat of compression, and vacuum pump is played good cooling effect, pressure reduction is increased greatly, usually can reach 20000 ~ 80000Pa, therefore only need to be equipped with the fore pump that power is little, aeration quantity is little, energy consumption is little, thereby reaches good energy-saving effect.

Claims (2)

1. hybrid Roots pump of twin-stage, comprise motor, coupling (1), protecgulum (2), bonnet (5) and the pump housing (3), it is characterized in that: the power rotor axle (9) that intermediate clapboard (13) and pair of parallel are installed is set in the pump housing (3), driven rotor axle (17), motor links to each other with power rotor axle (9) by coupling (1), power rotor axle (9) is by synchromesh gear (15,16) be connected with driven rotor axle (17), before the pump housing (3) is separated into by intermediate clapboard (13), latter two chamber, intermediate clapboard (13) is provided with connecting passage (12), a pair of rotor is set in each chamber, every pair of orthogonal being installed on power rotor axle (9) and the driven rotor axle (17) of rotor, rear chamber (19) is provided with cold air import (22), the relief opening (6) of rear chamber (19) connects the import of heat exchanger (8), and the outlet of heat exchanger (8) is communicated with the cold air import (22) of rear chamber (19) by returning air pipe (7).
2. the hybrid Roots pump of twin-stage according to claim 1 is characterized in that: pressure difference valve (4) is set between the suction port of the arbitrary position on the gas circuit between front chamber's relief opening and rear chamber's suction port and front chamber.
CN 201220281760 2012-06-14 2012-06-14 Double-stage mixing type roots vacuum pump Active CN202646011U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 201220281760 CN202646011U (en) 2012-06-14 2012-06-14 Double-stage mixing type roots vacuum pump

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 201220281760 CN202646011U (en) 2012-06-14 2012-06-14 Double-stage mixing type roots vacuum pump

Publications (1)

Publication Number Publication Date
CN202646011U true CN202646011U (en) 2013-01-02

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ID=47415128

Family Applications (1)

Application Number Title Priority Date Filing Date
CN 201220281760 Active CN202646011U (en) 2012-06-14 2012-06-14 Double-stage mixing type roots vacuum pump

Country Status (1)

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CN (1) CN202646011U (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107100844A (en) * 2017-06-23 2017-08-29 山东明天机械有限公司 Twin-stage Roots's vapour compression machine

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107100844A (en) * 2017-06-23 2017-08-29 山东明天机械有限公司 Twin-stage Roots's vapour compression machine

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