CN102182680B - Multi-stage speed changing screw pump - Google Patents
Multi-stage speed changing screw pump Download PDFInfo
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- CN102182680B CN102182680B CN 201110147947 CN201110147947A CN102182680B CN 102182680 B CN102182680 B CN 102182680B CN 201110147947 CN201110147947 CN 201110147947 CN 201110147947 A CN201110147947 A CN 201110147947A CN 102182680 B CN102182680 B CN 102182680B
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- screw rod
- screw
- pump
- screw pump
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Abstract
The invention discloses a multi-stage speed changing screw pump which comprises n stages of screw pump chambers which are connected in series into an integrity; the medium outlet of the previous-stage screw pump chamber is communicated with the medium outlet of the next-stage screw pump chamber; each-stage screw pump chamber forms one- stage screw pump; the rotation speed of the next-stage screw pump is higher than that of the previous-stage screw pump; and the screw pitch of the screw of the next-stage screw pump is less than that of the previous-stage screw pump. According to the invention, because the previous-stage screw pump has greater screw pitch, the flow rate of an absorbed medium is greater, and the screw pitch of the latter-stage screw pump is less, thus achieving higher output pressure; through improving the rotation speed of the next-stage screw pump, the large flow rate input of the previous-stage can be received better, and higher pressure output can be maintained; and compared with the serial and parallel pump sets, the screw pump has smaller volume, the arrangement of a pipeline and the additional pieces is relative simple, the output pressure and flow rate of the screw pump can be improved to a large extent, the screw pump can be suitable for occasions with higher requirements on the flow rate and pressure, the use cost is saved, and the operation difficulty is reduced.
Description
Technical field
The present invention relates to a kind of liquid medium conveying mechanism, the higher screw pump of particularly a kind of delivery pressure.
Background technique
Screw pump is to utilize the revolution of screw rod to come suction liquid.Screw pump is divided into helical rotor pump and multi screwpump, and multi screwpump generally comprises initiatively screw rod and the driven screw rod of cooperation with it, and initiatively screw rod drives revolution by prime mover, and driven screw rod is done counterrotating with the active screw rod.Screw pump forms some seal spacies through screw rod with between pump intake and exhaust port; Rotation and engagement along with screw rod; These seal spacies constantly form at the suction end of pump; Wherein liquid-filled with in the suction chamber, and pass continuously to exhaust end along screw axial from suction chamber, the liquid that is enclosed in each space is constantly discharged.Can find out by above narration, screw pump have that loss is little, economic performance good, pressure is high and even, flow is even, rotating speed is high and can with the characteristics of prime mover direct connection, thereby be widely used in every field.
But, requiring simultaneously flow is also had bigger requirement in the higher environment for pressure, then single screw pump is to meet the requirements of.Utilize the serial fashion that generally uses to improve the ultimate pressure of pump, but can't realize the purpose of big flow; And the screw pump floor space after the series connection increases.The parallel-connected pumps group can improve final flow, but pressure can not be improved.Require all higher occasion for flow and pressure, use parallel connection to add the pump group of series connection, can make the bigger increase of floor space, pipeline valve is arranged in disorder complicacy, when increasing cost, improves operation easier.And independently screw pump can not satisfy delivery pressure and the higher occasion use of traffic requirement.
Therefore, need a kind of screw pump, with respect to series-parallel pump group; Has smaller size smaller; Pipeline and annex thereof are arranged simple relatively, and can improve the delivery pressure and the flow of screw pump largely, can satisfy the occasion use that flow and pressure is had high requirement; Practice thrift user cost, reduce operation easier.
Summary of the invention
In view of this, the object of the invention provides a kind of multi-change speed screw pump, with respect to series-parallel pump group; Has smaller size smaller; Pipeline and annex thereof are arranged simple relatively, and can improve the delivery pressure and the flow of screw pump largely, can satisfy the occasion use that flow and pressure is had high requirement; Practice thrift user cost, reduce operation easier.
Multi-change speed screw pump of the present invention; Comprise series connection all-in-one-piece n level screw rod pump chamber; The media outlet of previous stage screw rod pump chamber is communicated in the medium inlet of back one-level screw rod pump chamber; Form independently screw pump respectively in every grade of screw rod pump chamber, back one-level screw pump rotating speed is higher than previous stage screw pump rotating speed, and the screw pitch of back one-level screw pump is less than the screw pitch of previous stage screw pump; Said n >=2.
Further, every grade of screw pump is two screw pump, and two screw pump comprises initiatively screw rod and driven screw rod; The active screw rod speed change transmission of the active screw rod of previous stage screw pump and back one-level pump;
Further, said n=2; Screw pump comprises casing, is divided into one-level screw rod pump chamber arranged side by side vertically and secondary screw rod pump chamber through fixing dunnage in the said casing, and said dunnage is the Pierced structure that one-level screw rod pump chamber and secondary screw rod pump chamber are communicated with; Be provided with initiatively screw rod I and the driven screw rod I that is mated in the one-level screw rod pump chamber, be provided with initiatively screw rod II and the driven screw rod II that is mated in the secondary screw rod pump chamber;
Cooperate with active screw rod I transmission to be provided with driving gear, cooperate the driven gear that is provided with the driving gear engagement with active screw rod II transmission, the velocity ratio of driving gear and driven gear is less than 1;
Further, said driving gear is set with driving gear shaft, and driven gear is set with driven gear shaft; Said driving gear is positioned at one-level screw rod pump chamber, and driving gear shaft is coaxial and in the circumferencial direction secure fit with screw rod I initiatively; Said driven gear is positioned at one-level screw rod pump chamber, driven gear shaft be rotatably assorted pass after the dunnage coaxial and with active screw rod II in the circumferencial direction secure fit;
Further, said driving gear shaft stretch in the end face deep gouge that screw rod I initiatively is provided with active screw rod I in the coaxial secure fit of circumferencial direction; And driving gear shaft is rotatably assorted to pass dunnage and stretch in the end face deep gouge that driven screw rod II is provided with and cooperates in the circumferencial direction coaxial rotation with driven screw rod II;
Further, said driven gear shaft be rotatably assorted pass dunnage and stretch in the end face deep gouge that screw rod II initiatively is provided with active screw rod II in the coaxial secure fit of circumferencial direction; Said driven gear shaft stretches in the end face deep gouge that driven screw rod I is provided with and cooperates in the circumferencial direction coaxial rotation with driven screw rod I;
Further, said casing is for by one-level casing and the detachable split-type structural that is fixedly connected to form of secondary casing, and said dunnage is between one-level casing and secondary casing and be fixedly connected to form integral body detachable with it;
Further, said driving gear shaft is rotatably assorted through rolling bearing I and dunnage, cooperates in the circumferencial direction coaxial rotation with driven screw rod II through cone rolling I; Driven gear shaft is rotatably assorted through rolling bearing II and dunnage, cooperates in the circumferencial direction coaxial rotation with driven screw rod I through cone rolling II;
Further, said support plate is a support frame structure, support frame as described above structure and rolling bearing I and the corresponding respectively bearing support that is provided with of rolling bearing II.
Beneficial effect of the present invention: multi-change speed screw pump of the present invention; Employing comprises the n level screw rod pump chamber that is connected into one and connection, and the screw speed of back one-level screw rod pump chamber is higher than the screw speed of previous stage screw rod pump chamber, and the screw pitch of back one-level screw pump is less than the screw pitch of previous stage screw pump; This structure previous stage is because pitch is bigger; Thereby the flow that sucks medium is bigger, and the pitch of back one-level is less, thereby has higher delivery pressure; Through improving the rotating speed of back one-level, can receive the big flow input of previous stage preferably, and keep higher pressure output; Promptly adopt a pump can reach higher flows and higher pressure,, have smaller size smaller with respect to series-parallel pump group; Pipeline and annex thereof are arranged simple relatively, and can improve the delivery pressure and the flow of screw pump largely, can satisfy the occasion use that flow and pressure is had high requirement; Practice thrift user cost, reduce operation easier.
Description of drawings
Below in conjunction with accompanying drawing and embodiment the present invention is further described.
Fig. 1 is a structural representation of the present invention;
Fig. 2 is the dunnage planimetric map.
Embodiment
Fig. 1 is a structural representation of the present invention; Fig. 2 is the dunnage planimetric map, and is as shown in the figure: the multi-change speed screw pump of present embodiment comprises series connection all-in-one-piece n level screw rod pump chamber; The media outlet of previous stage screw rod pump chamber is communicated in the medium inlet of back one-level screw rod pump chamber; Form independently screw pump respectively in every grade of screw rod pump chamber, back one-level screw pump rotating speed is higher than previous stage screw pump rotating speed, and the screw pitch of back one-level screw pump is less than the screw pitch of previous stage screw pump; Said n >=2; Certainly, according to the characteristics of pump, chopped-off head screw rod pump chamber is provided with the medium suction port, and final stage screw rod pump chamber is provided with the medium delivery outlet, to be adapted to actual demand; And for the screw pump that is used for conveyance fluid, initiatively screw rod has the setting of power input certainly, can be to form power input Transmitted chains structure, also can be independently power input separately.
In the present embodiment, be the twin-screw pair in every grade of screw rod pump chamber, the twin-screw pair comprises initiatively screw rod and driven screw rod; The active screw rod speed change transmission of the active screw rod of previous stage screw rod pump chamber and back one-level pump chamber; Form Transmitted chains and carry out transmission, compact structure is saved transfer motion power, thus energy saving cost and cost of material; Be beneficial to according to pressure with look active screw rod that needs accurately control previous stage screw rod pump chamber velocity ratio up and down with the active screw rod of back one-level pump chamber, be easy to control.
In the present embodiment, said n=2; Screw pump comprises casing, is divided into one-level screw rod pump chamber arranged side by side vertically 2 and secondary screw rod pump chamber 8 through fixing dunnage 4 in the said casing, the Pierced structure of said dunnage 4 for one-level screw rod pump chamber 2 and secondary screw rod pump chamber 8 are communicated with; Be provided with initiatively screw rod I 1 and the driven screw rod I 14 that is mated in the one-level screw rod pump chamber 2, be provided with initiatively screw rod II16 and the driven screw rod II15 that is mated in the secondary screw rod pump chamber 8; Be separated into the monolithic construction of pump chamber through dunnage 4, make the screw pump structure further compact, and be beneficial to and improve the whole stability of pump, reduce the pressure head loss, more can be applicable to the needs of big flow and high pressure, energy saving;
Cooperate with active screw rod I 1 transmission and to be provided with driving gear 5; Cooperate the driven gear 12 that is provided with driving gear 5 engagements with active screw rod II16 transmission; The velocity ratio of driving gear 5 and driven gear 12 is less than 1; The rotating speed of the moving screw rod II16 of the hero of biography is higher than initiatively screw rod I 1, to adapt to big flow input; Initiatively screw rod I 1 has power intake certainly, and realizes the Transmitted chains transmission with active screw rod II16, practices thrift the power equipment input, reduces cost; Directly adopt gear transmission, avoid transmission too much to lose when practicing thrift the transmission space, improve transmission efficiency, thereby guarantee the efficient of pump.
In the present embodiment, said driving gear 5 is set with driving gear shaft 51, and driven gear 12 is set with driven gear shaft 121; Said driving gear 5 is positioned at one-level screw rod pump chamber 2, and driving gear shaft 121 and screw rod I initiatively 1 are coaxial and in the circumferencial direction secure fit, can adopt structures such as spline, flat key or screw thread, flange connection all can realize; Said driven gear 12 is positioned at one-level screw rod pump chamber 2; Driven gear shaft 121 is coaxial and in the circumferencial direction secure fit with active screw rod II16 passing dunnage 4 backs around the mode of self rotational, can adopt structures such as spline, flat key or screw thread, flange connection all can realize; Split-type structural is beneficial to installation and removal, and it is secondary to be convenient to change the pump chamber inner gear shaft, and then changes the screw driven rotating speed of secondary, reduces manufacture difficulty, increases work efficiency.
In the present embodiment, said driving gear shaft 51 stretch in the end face deep gouge that screw rod I 1 initiatively is provided with active screw rod I1 in the coaxial secure fit of circumferencial direction; And driving gear shaft is rotatably assorted to pass dunnage and stretch in the end face deep gouge that driven screw rod II15 is provided with and cooperates in the circumferencial direction coaxial rotation with driven screw rod II; Driving gear shaft 51 two ends are supported in dunnage 4 and driven screw rod II15 and active screw rod I 1 respectively, can improve the mutual supporting effect between gear shaft and the screw rod, improve screw pump whole operation stability and reliable transmission property.
In the present embodiment, said driven gear shaft 121 be rotatably assorted pass dunnage 4 and stretch in the end face deep gouge that screw rod II16 initiatively is provided with active screw rod II16 in the coaxial secure fit of circumferencial direction; Said driven gear shaft 121 stretches in the end face deep gouge that driven screw rod I 14 is provided with and cooperates in the circumferencial direction coaxial rotation with driven screw rod I 14; The driven gear shaft two ends are supported in dunnage and driven screw rod I 14 and active screw rod II16 respectively; Guarantee integrally-built compactedness, integrity and stability, guarantee the operational reliability of screw pump, thereby the characteristic that guarantees high-pressure high-flow can long-time running.
As shown in the figure, initiatively screw rod I 1 and driven screw rod I 14 respectively with the driving gear shaft 51 corresponding end face deep gouges that are provided with, initiatively screw rod II16 and driven screw rod II15 respectively with the driven gear shaft 121 corresponding end face deep gouges that are provided with.
In the present embodiment; Said casing is by one-level casing 3 and the secondary casing 9 detachable split-type structurals that are fixedly connected to form; Said dunnage 4 between one-level casing 3 and secondary casing 9 and with one-level casing 3 and the secondary casing 9 detachable integral body that are fixedly connected to form; As shown in the figure; Split type housing structure is connected through bolt with dunnage and forms sealing with the external world, and realizes sealing through the sealing gasket 11 that is arranged at the dunnage both sides, and dunnage is provided with the bolt hole 41 that is used to pass fixing bolt; This structure is beneficial to installation and removal, makes things convenient for the periodic cleaning pump chamber, simplifies maintenance process, increases work efficiency.
In the present embodiment, said driving gear shaft 51 is rotatably assorted with dunnage 4 through rolling bearing I 6, cooperate in the circumferencial direction coaxial rotation with driven screw rod II15 through cone rolling I 7; Driven gear shaft 121 is rotatably assorted through rolling bearing II10 and dunnage 4, cooperates in the circumferencial direction coaxial rotation with driven screw rod I 14 through cone rolling II13; Reduce resistance to motion, improve transmission efficiency, guarantee the whole efficiency of screw pump; Adopt the structure of cone rolling I 7 and cone rolling II13, the axial thrust load that produces in the time of can offsetting the screw pump operation still keeps operation preferably under axial thrust load, be beneficial to the operational efficiency that improves pump.
In the present embodiment; Said support plate 4 is a support frame structure; Support frame as described above structure and rolling bearing I 6 and the corresponding respectively bearing support that is provided with of rolling bearing II10 are respectively bearing support 42 and bearing support 43 among the figure, as shown in the figure; Bearing support 42 is connected in support plate 4 through the strut one that radioactivity is arranged respectively with bearing support 43, forms support frame structure; The support frame structure manufacturing is simple, and weight is lighter, and has non-deformability preferably, makes the running resistance of fluid lower, improves the transfer efficiency of pump, energy saving.
Explanation is at last; Above embodiment is only unrestricted in order to technological scheme of the present invention to be described; Although with reference to preferred embodiment the present invention is specified, those of ordinary skill in the art should be appreciated that and can make amendment or be equal to replacement technological scheme of the present invention; And not breaking away from the aim and the scope of technological scheme of the present invention, it all should be encompassed in the middle of the claim scope of the present invention.
Claims (7)
1. multi-change speed screw pump; Comprise series connection all-in-one-piece n level screw rod pump chamber; The media outlet of previous stage screw rod pump chamber is communicated in the medium inlet of back one-level screw rod pump chamber; Form independently screw pump respectively in every grade of screw rod pump chamber, back one-level screw pump rotating speed is higher than previous stage screw pump rotating speed, and the screw pitch of back one-level screw pump is less than the screw pitch of previous stage screw pump;
Every grade of screw pump is two screw pump, and two screw pump comprises initiatively screw rod and driven screw rod; The active screw rod speed change transmission of the active screw rod of previous stage screw pump and back one-level pump;
Said n=2; It is characterized in that: screw pump comprises casing, is divided into one-level screw rod pump chamber arranged side by side vertically and secondary screw rod pump chamber through fixing dunnage in the said casing, and said dunnage is the Pierced structure that one-level screw rod pump chamber and secondary screw rod pump chamber are communicated with; Be provided with initiatively screw rod I and the driven screw rod I that is mated in the one-level screw rod pump chamber, be provided with initiatively screw rod II and the driven screw rod II that is mated in the secondary screw rod pump chamber;
Cooperate with the transmission of active screw rod I to be provided with driving gear, cooperate the driven gear that is provided with the driving gear engagement with the transmission of active screw rod II, the velocity ratio of driving gear and driven gear is less than 1.
2. multi-change speed screw pump according to claim 1 is characterized in that: said driving gear is set with driving gear shaft, and driven gear is set with driven gear shaft; Said driving gear is positioned at one-level screw rod pump chamber, and driving gear shaft is coaxial and in the circumferencial direction secure fit with screw rod I initiatively; Said driven gear is positioned at one-level screw rod pump chamber, driven gear shaft be rotatably assorted pass after the dunnage coaxial and with active screw rod II in the circumferencial direction secure fit.
3. multi-change speed screw pump according to claim 2 is characterized in that: said driving gear shaft stretch in the end face deep gouge that screw rod I initiatively is provided with active screw rod I in the coaxial secure fit of circumferencial direction; And driving gear shaft is rotatably assorted to pass dunnage and stretch in the end face deep gouge that driven screw rod II is provided with and cooperates in the circumferencial direction coaxial rotation with driven screw rod II.
4. multi-change speed screw pump according to claim 3 is characterized in that: said driven gear shaft be rotatably assorted pass dunnage and stretch in the end face deep gouge that screw rod II initiatively is provided with active screw rod II in the coaxial secure fit of circumferencial direction; Said driven gear shaft stretches in the end face deep gouge that driven screw rod I is provided with and cooperates in the circumferencial direction coaxial rotation with driven screw rod I.
5. multi-change speed screw pump according to claim 4; It is characterized in that: said casing is for by one-level casing and the detachable split-type structural that is fixedly connected to form of secondary casing, and said dunnage is between one-level casing and secondary casing and be fixedly connected to form integral body detachable with it.
6. multi-change speed screw pump according to claim 5 is characterized in that: said driving gear shaft is rotatably assorted through rolling bearing I and dunnage, cooperates in the circumferencial direction coaxial rotation with driven screw rod II through the cone rolling I; Driven gear shaft is rotatably assorted through rolling bearing II and dunnage, cooperates in the circumferencial direction coaxial rotation with driven screw rod I through the cone rolling II.
7. multi-change speed screw pump according to claim 6 is characterized in that: said dunnage is a support frame structure, support frame as described above structure and rolling bearing I and the corresponding respectively bearing support that is provided with of rolling bearing II.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110147947 CN102182680B (en) | 2011-06-02 | 2011-06-02 | Multi-stage speed changing screw pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110147947 CN102182680B (en) | 2011-06-02 | 2011-06-02 | Multi-stage speed changing screw pump |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102182680A CN102182680A (en) | 2011-09-14 |
| CN102182680B true CN102182680B (en) | 2012-12-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201110147947 Expired - Fee Related CN102182680B (en) | 2011-06-02 | 2011-06-02 | Multi-stage speed changing screw pump |
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| Country | Link |
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| CN (1) | CN102182680B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2533621B (en) | 2014-12-23 | 2019-04-17 | Edwards Ltd | Rotary screw vacuum pumps |
| CN105952636B (en) * | 2016-05-05 | 2017-11-24 | 扬州大学 | The capacity new-type double screw pump of self-lubricating supporting |
| CN109209875B (en) * | 2016-08-01 | 2020-05-01 | 珠海格力电器股份有限公司 | Screw compressor and multistage screw transmission structure thereof |
| CN107630838A (en) * | 2017-10-27 | 2018-01-26 | 西华大学 | A kind of helico-axial gas fluid mixture pump |
| CN113530812A (en) * | 2020-04-21 | 2021-10-22 | 天津君宇科技股份有限公司 | Multi-stage variable speed screw pump |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL162721C (en) * | 1969-02-12 | 1980-06-16 | Cerpelli Orazio | SCREW PUMP. |
| GB2165890B (en) * | 1984-10-24 | 1988-08-17 | Stothert & Pitt Plc | Improvements in pumps |
| CN1560476A (en) * | 2004-02-19 | 2005-01-05 | 北京石油化工学院 | Oil production system with electric oil-submersible dule screw rod pump |
| CN201526451U (en) * | 2009-09-13 | 2010-07-14 | 王旭 | Novel double-screw pump provided with threaded sleeves with unequal pitches |
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2011
- 2011-06-02 CN CN 201110147947 patent/CN102182680B/en not_active Expired - Fee Related
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| CN102182680A (en) | 2011-09-14 |
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