CN201209552Y - Low flow pulsation internal gear pump - Google Patents
Low flow pulsation internal gear pump Download PDFInfo
- Publication number
- CN201209552Y CN201209552Y CNU2008201189307U CN200820118930U CN201209552Y CN 201209552 Y CN201209552 Y CN 201209552Y CN U2008201189307 U CNU2008201189307 U CN U2008201189307U CN 200820118930 U CN200820118930 U CN 200820118930U CN 201209552 Y CN201209552 Y CN 201209552Y
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- gear
- ring gear
- dislocation
- external gear
- external
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- Details And Applications Of Rotary Liquid Pumps (AREA)
Abstract
The utility model relates to a low-flow pulse internal gear pump; the meshing of an internal gear ring and an outer gear is changed into the meshing of two internal gear rings and two outer gears by overlapping and half a gear tooth of transplacement, so that a flow pulse curve similar to a sine curve is overlapped by 180 degrees through phase dislocation, so that the flow pulse of the internal gear pump is near zero.
Description
Technical field
The utility model is a kind of crescent gear pump of the dynamical element oil hydraulic pump in the hydraulic system, compares with existing crescent gear pump, and it is little to have flow pulsation, and noise is low, the characteristics that volumetric efficiency is high.
Background technique;
Crescent gear pump all is a ring gear and an external gear engagement at present, though crescent gear pump is multiple tooth while oil extraction, lower than external gear pump monodentate oil extraction flow pulsation, but when variable frequency low speed drives, the flow pulsation meeting has a strong impact on system's proper functioning, and the utility model provides a kind of output flow pulsation lower crescent gear pump.
Summary of the invention;
There is the theoretical delivery pulsation in crescent gear pump in the oil extraction process, look according to test is apparent, the similar sinusoidal curve of flow pulsation rule of crescent gear pump, cycle is the rotational time of a tooth pitch, the pulsation of this class is little owing to frequency height, amplitude when high speed rotate, and the hydraulic system proper functioning is not had much affect.But under slow-speed of revolution operating mode, will produce the flow pulsation of low frequency large amplitude, have a strong impact on system's proper functioning.For solving crescent gear pump under slow-speed of revolution operating mode, produce this technical barrier of low frequency large amplitude flow pulsation, the utility model is taked following technological scheme.
The technological scheme that the utility model reduces inside engaged gear pumping flow pulsation amplitude is: external gear pump parallel connection in adopting two groups, and with two groups of gear dislocation half tooth distances, its structure is: upper end cap, the ring gear bearing housing, lower end cap connects successively and compresses with stretching screw, bearing housing is in the partial center hole of upper end cap and lower end cap, in the ring gear bearing housing, place ring gear and dislocation ring gear, external gear and dislocation external gear mesh with ring gear and dislocation ring gear respectively, axle is in external gear and dislocation external gear hole, with flat strong external gear and the dislocation external gear of connecting, the axle two ends are respectively in the endoporus of bearing housing, interior circular arc of moon block teeth and external gear and dislocation external gear tooth top Spielpassung, month block teeth external arc cooperates with the ring gear and the ring gear tip clearance that misplaces and is fixed on this position, external gear and dislocation external gear circumferential misalignment half tooth distance, with the ring gear of its engagement and the dislocation ring gear half tooth distance that misplaces equally, obtain the output flows of two groups of stacks, make total discharge near steady straight line.
Usefulness of the present utility model is along with reaching its maturity of motor frequency conversion technology, to be used widely with the variable speed of variable-frequency motor and driven by servomotor oil hydraulic pump, the energy-efficient hydraulic power supply of unsteady flow amount.The cardinal principle of this energy-saving scheme is the only required hydraulic flow of output loading of power source, no spill losses, thus reach energy-conservation purpose.But when the required flow of load was very little, the rotating speed of pump can be very low, even reach per second several commentaries on classics at zero point, and under this operating mode, the flow and the pressure of present used crescent gear pump output can produce very big low frequency pulsating, have a strong impact on the hydraulic system proper functioning.The utility model can at utmost reduce output flow and the pressure pulsation of crescent gear pump under the low speed operating mode, to hydraulic system is energy-conservation consumption reduction is significant.
Description of drawings:
The utility model low discharge pulsation crescent gear pump cross-sectional schematic that shown in Figure 1 is, (11) low pressure filler opening wherein, (12) bearing housing, (13) upper end cap, (14) high pressure tooth hydraulic fluid port.
Fig. 2 is the cross-sectional schematic of Figure 1A-A, (1) lower end cap wherein, (2) stretching screw, (3) external gear, (4) misphase external gear, (5) axle, (6) flat Key, (7) month block teeth, (8) ring gear, (9) dislocation ring gear, (10) ring gear bearing housing.
Specific embodiment:
A kind of low discharge pulsation crescent gear pump, upper end cap 13, ring gear bearing housing 10, lower end cap 1 connect successively and compress with stretching screw 2, and bearing housing 12 is in the eccentric mesopore of upper end cap 13 and lower end cap 1.In the ring gear bearing housing 10, place ring gear 8 and dislocation ring gear 9, external gear 3 and dislocation external gear 4 mesh with ring gear 8 and dislocation ring gear 9 respectively, axle 5 is in external gear 3 and dislocation external gear 4 holes, connect with flat strong 6, axle 5 two ends are respectively in the endoporus of bearing housing 12, circular arcs cooperate with the external gear 3 and external gear 4 tip clearances that misplace in month block teeth 7, month block teeth 7 external arc cooperate with the ring gear 8 and ring gear 9 tip clearances that misplace, and be fixed on this position, external gear 3 and dislocation external gear 4 circumferencial directions dislocation half tooth distance are with the ring gear 8 and the dislocation internal gear 9 same dislocation half tooth distances of its engagement.
The working principle of the utility model low discharge pulsation crescent gear pump is, in the accompanying drawing 2, external impetus live axle 5 turns clockwise, axle 5 drives external gear 3 and dislocation external gear 4 by flat key 6, external gear 3 and dislocation external gear 4 drive ring gear 8 and dislocation ring gear 9 turns clockwise, 7 times side spaces of month block teeth because in, external tooth breaks away from the engagement space enlargement, then be the oil suction district, month block teeth 7 upper right because in, external tooth enters the engagement space compression and then is the oil extraction district, 7 isolation of moon block teeth are high, the effect of low pressure area, the other end rises high, the low pressure area buffer action be in, the external tooth line of contact.The working principle that the utility model reduces flow pulsation is, will former one group in external gear pump change two groups of dislocation in parallel into and mesh, magnitude of misalignment is the half tooth distance, makes 180 ° of flow pulsation curve phase differences, obtains two groups of flow mathematic(al) representation Q
1=ESin α+C, Q
2=ESin (α+180 °)+C=-ESin α+C, if with above-mentioned two constant amplitudes, etc. the cycle, the sinusoidal curve stack that phase difference is 180 °, then pump total discharge Q=Q
1+ Q
2=2C, constant C is the mean flowrate of external gear pump in single group.
Claims (1)
- A kind of low discharge pulsation crescent gear pump, upper end cap (13) ring gear bearing housing (10) lower end cap (1) connects successively and compresses with stretching screw (2), bearing housing (12) is in the eccentric mesopore of upper end cap (13) and lower end cap (1), place ring gear (8) and dislocation ring gear (9) in the ring gear bearing housing (10), external gear (3) and dislocation external gear (4) mesh with ring gear (8) and dislocation ring gear (9) respectively, axle (5) is in external gear (3) and dislocation external gear (4) hole, connect with flat strong (6), axle (5) two ends are supported by the bearing housing (12) in upper end cap (13) and the eccentric mesopore of lower end cap (1) respectively, the interior circular arc of moon block teeth (7) cooperates with external gear (3) and dislocation external gear (4) tip clearance, month block teeth (7) external arc cooperates with the ring gear (8) and ring gear (9) tip clearance that misplaces and is fixed on this position, it is characterized in that: axle (5) is gone up the external gear (3) and dislocation external gear (4) circumferential misalignment half tooth distance that connects with flat strong (6), with external gear (3), the ring gear (8) of dislocation external gear (4) engagement and the ring gear (9) that the misplaces half tooth distance that misplaces equally.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201189307U CN201209552Y (en) | 2008-06-12 | 2008-06-12 | Low flow pulsation internal gear pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201189307U CN201209552Y (en) | 2008-06-12 | 2008-06-12 | Low flow pulsation internal gear pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201209552Y true CN201209552Y (en) | 2009-03-18 |
Family
ID=40480285
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008201189307U Expired - Fee Related CN201209552Y (en) | 2008-06-12 | 2008-06-12 | Low flow pulsation internal gear pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201209552Y (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103939332A (en) * | 2014-04-23 | 2014-07-23 | 成都大学 | Involute internally meshed gear pump with two sides of crescent plate having dynamic lubricating effect |
| CN104329250A (en) * | 2014-09-03 | 2015-02-04 | 浙江大学 | Low flow pulsating bidirectional gear pump |
| CN106090589A (en) * | 2016-08-03 | 2016-11-09 | 湖南机油泵股份有限公司 | A kind of rotor-type oil pump |
| CN107939671A (en) * | 2017-10-19 | 2018-04-20 | 浙江大学 | A kind of tandem low pulse crescent gear pump with error angle |
| CN111730417A (en) * | 2020-07-14 | 2020-10-02 | 安徽聚源昕锐精密机械有限公司 | High-compression-resistance eccentric cover for machine tool and forming process thereof |
-
2008
- 2008-06-12 CN CNU2008201189307U patent/CN201209552Y/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103939332A (en) * | 2014-04-23 | 2014-07-23 | 成都大学 | Involute internally meshed gear pump with two sides of crescent plate having dynamic lubricating effect |
| CN103939332B (en) * | 2014-04-23 | 2018-04-10 | 成都大学 | A kind of swing link bilateral has the involute crescent gear pump of dynamic lubricating effect |
| CN104329250A (en) * | 2014-09-03 | 2015-02-04 | 浙江大学 | Low flow pulsating bidirectional gear pump |
| CN104329250B (en) * | 2014-09-03 | 2016-06-29 | 浙江大学 | A kind of low-flux pulse double-direction gearpump |
| CN106090589A (en) * | 2016-08-03 | 2016-11-09 | 湖南机油泵股份有限公司 | A kind of rotor-type oil pump |
| CN107939671A (en) * | 2017-10-19 | 2018-04-20 | 浙江大学 | A kind of tandem low pulse crescent gear pump with error angle |
| CN111730417A (en) * | 2020-07-14 | 2020-10-02 | 安徽聚源昕锐精密机械有限公司 | High-compression-resistance eccentric cover for machine tool and forming process thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090318 Termination date: 20150612 |
|
| EXPY | Termination of patent right or utility model |