CN103727026A - Inner engaged gear pump - Google Patents
Inner engaged gear pump Download PDFInfo
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- CN103727026A CN103727026A CN201410038255.7A CN201410038255A CN103727026A CN 103727026 A CN103727026 A CN 103727026A CN 201410038255 A CN201410038255 A CN 201410038255A CN 103727026 A CN103727026 A CN 103727026A
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Abstract
The invention provides an inner engaged gear pump, comprising an annular gear pressure balance device, an axial automatic floating compensation device and two radial automatic floating compensation devices, wherein the annular gear pressure balance device is composed of an outer crescent plate with a groove, and an annular gear; hydraulic force and gear meshing force on the annular gear can be effectively balanced; the action force of the annular gear on the pump body is reduced; abrasion of the annular gear and the pump body is reduced; the inner engaged gear pump can normally work for a long period of time when the output pressure is relatively high; the service life of the gear pump is greatly prolonged; the axial automatic floating compensation device is composed of left and right valve plates, left and right inner cover plates and the like; each radial automatic floating compensation device is composed of an oil outlet groove, an annular gear and a high-pressure chamber, and inner and outer crescent plates, a leaf spring, a sealing strip and the like; the three automatic floating compensation devices achieve automatic floating compensation after abrasion between two end face gaps of the annular gear and among the annular gear, the gear and the crescent blocks; pressure loss is reduced; output pressure and work efficiency are improved.
Description
Technical field
The present invention relates to gear pump field, especially, relate to a kind of crescent gear pump.
Background technique
The outstanding advantages such as crescent gear pump has compact structure, flow pulsation is little, pressure is large, noise is low, self-priming performance is good, speed range is large, comprise a pair of external gear and the internal gear with involute profile intermeshing, external gear is driving wheel, internal gear is follower, with month block teeth, oil sucting cavity and pumping cavity are separated between the two, two gears turn to identical, the gear teeth that enter oil sucting cavity exit engagement, thereby oil sucting cavity volume is increased, form vacuum, fluid is inhaled under barometric pressure effect, and two gears are brought the fluid of oil sucting cavity into pumping cavity; Enter pumping cavity gear and enter engagement, pumping cavity volume dwindles, and fluid is forced out, and completes oil extraction process.Because the ring gear of crescent gear pump is subject to the hydraulic coupling of fluid and making a concerted effort of gear mesh force, annular gear outer-wall produces larger pressure to the pump housing, when ring gear turns round under high rotating speed and high oil pressure condition, annular gear outer-wall is the limiting value allowable considerably beyond material to the contact stress of pump housing inwall and roulette speed, as bad in lubrication effect will generation acutely rubbed, thereby generation adhesive wear, make ring gear and the pump housing produce gummed, cause crescent gear pump to lose efficacy, therefore, when delivery pressure surpasses certain value, the ring gear of crescent gear pump and the wearing and tearing between the pump housing aggravate gradually, the raising of the working pressure of restriction crescent gear pump.
Available technology adopting axial float compensation device and/or radial floating compensation device or set up composite bush and solve ring gear outer surface and the wear problem of pump housing internal surface when high pressure oil is worked, but ring gear outer surface contacts between internal surface with the pump housing and ring gear, small gear and month block teeth between wear problem still exist, cause pressure transient or decline, use inconvenient.
At present also there is the product that can solve the internally engaging pump of above-mentioned wear problem, but complex structure, manufacturability is poor, and manufacture cost strengthens, and practicability is not strong.
Therefore, design that a kind of structure is simplified, the crescent gear pump of abrasiveness, good stability has very important significance.
Summary of the invention
The object of the invention is to provide a kind of crescent gear pump, can effectively solve the wear problem of ring gear and the pump housing under high workload pressure, guarantee that crescent gear pump works long hours under high workload pressure, kept the features such as low noise, high efficiency simultaneously, concrete technological scheme is as follows:
A crescent gear pump, comprises housing, gear shaft, ring gear and swing link;
Described housing is for being connected the pump housing, left inside cover plate, left outside cover plate, right inside cover plate and right outside cover plate by stud bolt the integral body forming;
The internal surface of described left inside cover plate and described right inside cover plate is respectively equipped with composite sliding bearing; In the endoporus of described right outside cover plate, be provided with check ring, packing ring and outside framework oil seal;
The upper end face of the described pump housing is provided with filler opening, and its side is provided with oil outlet, and the surface of internal cavity connecting with described oil outlet is provided with oil outlet groove;
Described gear shaft is provided with left axle journal, gear and right axle journal, described left axle journal is installed on the internal surface of left thrust plate and composite sliding bearing, and described right axle journal is installed on the internal surface of right thrust plate, composite sliding bearing, spring flange, packing ring and outside framework oil seal and stretches out described right outside cover plate;
Between described left inside cover plate and described left thrust plate, be provided with left fixing ring, between described right inside cover plate and right thrust plate, be provided with right fixing ring; On described left thrust plate and described right thrust plate, be equipped with oil through, described right thrust plate is provided with the eyebrow groove being communicated with described oil through;
Described ring gear is arranged on the internal surface of the described pump housing, and is meshed with described gear; The outer annulus edge of described ring gear is evenly equipped with the turnover oilhole at 1-2 row central position and radial offset α angle;
Described swing link comprises interior swing link and outer swing link, and the internal surface of described interior swing link and the cylindrical of described gear fit tightly, and the outer surface of described outer swing link and the inner circle of described ring gear fit tightly; The position that described outer swing link is meshed with described ring gear is radially provided with groove.
Preferred in above technological scheme, described interior swing link and outer swing link are all arranged on special-shaped locating stud.
Preferred in above technological scheme, described groove is arranged on the middle part of described outer swing link, and the quantity of described groove is more than or equal to 1.
Preferred in above technological scheme, described groove is triangular groove, and the transverse cross-sectional profile of triangular groove is V-type, and its v-angle is 45 °-75 °, and its length is 5-10mm.
Preferred in above technological scheme, described groove is 2 symmetrically arranged triangular grooves.
Preferred in above technological scheme, on described outer swing link, be also provided with passage, two described grooves are symmetricly set on described passage above and below, and the inside of described passage and the inside of described groove communicate; Described in the distance between center line of described passage, the perpendicular distance of the upper-end surface of outer swing link is 15-25mm, and the perpendicular distance of the left and right center line of the described outer swing link of distance is 0-10mm.
Preferred in above technological scheme, on the left surface of described outer swing link and right flank, be arranged with opening slot, the width of described opening slot is 1-5mm, and its degree of depth is 0.5-2.0mm, and the distance of outer swing link upper-end surface is 15-25mm described in its center line-spacing; Described groove is symmetricly set on the both sides of described outer swing link, and the inside of described groove communicates with the inside of described opening slot respectively.
Preferred in above technological scheme, described groove is triangular groove, and its quantity is more than or equal to 1, and its length is 5-10mm.
Preferred in above technological scheme, described triangular groove is 2, and it is symmetricly set on the above and below of described opening slot.
Preferred in above technological scheme, described α angle is 10 °-20 °.
The present invention has following beneficial effect:
(1) position that the present invention is meshed with ring gear by outer swing link is radially provided with groove, form ring gear pressure equaliser, can suffered hydraulic coupling and the gear mesh force of active balance ring gear, reduce the active force of ring gear to the pump housing, by the setting of outer swing link triangular groove, effectively protect the oil film between ring gear and the pump housing, reduce the wearing and tearing of ring gear outer surface and pump housing internal surface, realize delivery pressure when higher crescent gear pump can normally work for a long time, greatly extend the life-span of gear pump; By an axial automatic floating compensation device and two radially automatic floating compensation device realize the automatic floating after wearing and tearing between ring gear both ends of the surface gap and ring gear, gear and month block teeth and compensate, reduce the pressure loss, improve delivery pressure and working efficiency.
(2) in the present invention, swing link and outer swing link are all arranged on special-shaped locating stud, easy for installation, and good seal performance.
(3) further groove of the present invention is triangular groove, and the transverse cross-sectional profile of triangular groove is V-type, and its v-angle is 45 °-75 °, its length is 5-10mm, 2 symmetrical triangular grooves are preferably set, can well the pressure oil in pressure oscillation district be transported to transition zone in advance, improve the stability of gear pump operation.
(4) on the present invention China and foreign countries swing link, be also provided with passage, two described grooves are symmetricly set on described passage above and below, and the inside of described passage communicates with the inside of described groove, described in the distance between center line of passage, the perpendicular distance of the upper-end surface of outer swing link is 15-25mm, the perpendicular distance of the left and right center line of the described outer swing link of distance is 0-10mm, easy to process, channels designs can be diversified, and can be designed to according to actual needs cylindrical or other shapes, the combination design of passage and groove can be transported to transition zone by the pressure oil in pressure oscillation district better in advance, make transition zone shift to an earlier date build-up pressure, in transition zone, ring gear is formed to a power, making a concerted effort of the hydraulic coupling that rebalancing ring gear was subject to originally and gear mesh force, greatly reduce the active force of ring gear to the pump housing, effectively protect the oil film between ring gear and the pump housing, guarantee the normal lubricated of ring gear, thereby assurance part is normally worked under high pressure conditions.
(5) on the left surface of the present invention China and foreign countries swing link and right flank, be arranged with opening slot, the width of described opening slot is 1-5mm, and its degree of depth is 0.5-2.0mm, and the distance of outer swing link upper-end surface is 15-25mm described in its center line-spacing; Described groove is symmetricly set on the both sides of described outer swing link, and the inside of described groove communicates with the inside of described opening slot respectively, and preferred, groove is triangular groove, and its quantity is more than or equal to 1, and its length is 5-10mm; Preferably, triangular groove is 2, it is symmetricly set on the above and below of described opening slot, opening slot design can be diversified, and can be designed to according to actual needs various shapes, the combination design of opening slot and groove can be transported to transition zone by the pressure oil in pressure oscillation district better in advance, improves global stability.
(6) in the present invention, the outer annulus edge of ring gear is evenly equipped with the turnover oilhole at 1-2 row central position and radial offset α angle, α angle is 10 °～20 °, can guarantee radially to pass in and out oil not interrupted have enough flows and turnover oilhole be located on the unidirectional flank of tooth of ring gear.
Except object described above, feature and advantage, the present invention also has other object, feature and advantage.Below with reference to figure, the present invention is further detailed explanation.
Accompanying drawing explanation
The accompanying drawing that forms the application's a part is used to provide a further understanding of the present invention, and schematic description and description of the present invention is used for explaining the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 is the structural representation of the crescent gear pump of the preferred embodiment of the present invention 1;
Fig. 2 is that the B-B of Fig. 1 is to view;
Fig. 3 is the schematic diagram of left thrust plate in Fig. 1;
Fig. 4 is the internal structure schematic diagram of Fig. 1;
Fig. 5 is the structural representation of the outer swing link of the first in Fig. 1;
Fig. 6 is that the B-B of Fig. 5 is to structural representation;
Fig. 7 is the structural representation of the outer swing link of the second in Fig. 1;
Fig. 8 is the D enlarged view of Fig. 7;
Fig. 9 is another structural representation of the outer swing link of the second in Fig. 1;
Figure 10 is the E enlarged view of Fig. 9;
Figure 11 is the pressure-plotting of crescent gear pump;
Figure 12 is the stressed projection chord length schematic diagram of crescent gear pump;
Figure 13 is the stressed schematic diagram in the inside of crescent gear pump.
Embodiment
Below in conjunction with accompanying drawing, embodiments of the invention are elaborated, but the multitude of different ways that the present invention can limit and cover according to claim is implemented.
A kind of crescent gear pump, comprise housing, gear shaft 16, ring gear 17 and swing link, described housing is for connecting by the pump housing 15, left inside cover plate 25, left outside cover plate 26, right inside cover plate 7 and right outside cover plate 1 integral body forming by stud bolt 5, by hexagon nut 27 and locating stud 6, be fixed, refer to Fig. 1 and Fig. 2, overall structure is simplified.
The internal surface of described left inside cover plate 25 and described right inside cover plate 7 is respectively equipped with composite sliding bearing 8; In the endoporus of described right outside cover plate 1, be provided with check ring 3, packing ring 4 and outside framework oil seal 2.
The upper end face of the described pump housing 15 is provided with filler opening 29, and its side is provided with oil outlet 30, and the surface of internal cavity connecting with described oil outlet 30 is provided with oil outlet groove 31, is convenient to entering and going out of oil.
Described gear shaft 16 is provided with left axle journal, gear 38 and right axle journal, its termination is with keyway 28, described left axle journal is installed on the internal surface of left thrust plate 24 and composite sliding bearing 8, and described right axle journal is installed on the internal surface of right thrust plate 14, composite sliding bearing 8, spring flange 3, packing ring 4 and outside framework oil seal 2 and stretches out described right outside cover plate 1; Between described left inside cover plate 25 and described left thrust plate 24, be provided with left fixing ring 12, between described right inside cover plate 7 and right thrust plate 14, be provided with right fixing ring 11; The many places, inside of described housing are provided with the first seal ring 9, the second seal ring 10 and fixing ring 13.
Described ring gear 17 is arranged on the internal surface of the described pump housing 15, and is meshed with described gear 38; The outer annulus edge of described ring gear 17 is evenly equipped with the turnover oilhole 39 at 1-2 row central position and radial offset α angle, α angle is 10 °～20 °, not interrupted and have a unidirectional flank of tooth that enough flows and turnover oilhole 39 are located at ring gear 17 for guaranteeing radially to pass in and out oil.
On described left thrust plate 24 and described right thrust plate 14, be equipped with oil through 34, described right thrust plate 14 is provided with the eyebrow groove 35 being communicated with described oil through 34, refer to Fig. 3, when the end face of ring gear 17 passes through eyebrow groove 35, high pressure oil flows into oil through 34 by eyebrow groove 35, reaches the effect that reduces noise.
Described swing link positions by swing link locating stud 18, comprise the interior swing link 19 and the outer swing link 20 that are supported on special-shaped locating stud 21, under the effect of spring sheet 22 and seal ring 23, the internal surface of described interior swing link 19 and the cylindrical of described gear 38 are fitted tightly, the outer surface of described outer swing link 20 and the inner circle of described ring gear 17 are fitted tightly; Described outer swing link 20 is radially provided with groove 202 with the position that described ring gear 17 is meshed.
The position that the outer swing link of crescent gear pump of the present invention is meshed with ring gear is radially provided with groove, form ring gear pressure equaliser, can suffered hydraulic coupling and the gear mesh force of active balance ring gear, reduce the active force of ring gear to the pump housing, by the setting of outer swing link triangular groove, effectively protect the oil film between ring gear and the pump housing, reduce the wearing and tearing of ring gear outer surface and pump housing internal surface, realize delivery pressure when higher crescent gear pump can normally work for a long time, greatly extend the life-span of gear pump; By an axial automatic floating compensation device and two radially automatic floating compensation device realize the automatic floating after wearing and tearing between ring gear both ends of the surface gap and ring gear, gear and month block teeth and compensate, reduce the pressure loss, improve delivery pressure and working efficiency.
The outer swing link of crescent gear pump of the present invention can be varied, refers to following several structure:
The structure of the outer swing link 20 of the first: described groove 202 is arranged on the middle part of described outer swing link 20, on described outer swing link 20, be also provided with passage 201, described groove 202 is 2 triangular grooves that are symmetricly set on described passage 201 above and belows, and the inside of described passage 201 communicates with the inside of described groove 202; The quantity of groove 202 can also be designed to be more than or equal to 1 quantity according to actual needs, and the transverse cross-sectional profile of triangular groove is V-type, and its v-angle A is 45 °-75 °, and its length L is 5-10mm; Described in the distance between center line of described passage 201, the perpendicular distance d1 of the upper-end surface of outer swing link 20 is 15-25mm, and the perpendicular distance d2 of the left and right center line of the described outer swing link 20 of distance is 0-10mm, refers to Fig. 5 and Fig. 6.
The structure of the outer swing link 20 of the second: be arranged with opening slot 203 on the left surface of described outer swing link 20 and right flank, the width d3 of described opening slot 203 is 1-5mm, its degree of depth is 0.5-2.0mm, and the distance d4 of outer swing link 20 upper-end surfaces is 15-25mm described in its center line-spacing; Described groove 202 is symmetricly set on the both sides of described outer swing link 20, and the inside of described groove 202 communicates with the inside of described opening slot 203 respectively, and described groove 202 is triangular groove, and its quantity is more than or equal to 1, and its length L is 5-10mm; Described triangular groove is 2, and it is symmetricly set on the above and below of described opening slot 203, and the shape of described triangular groove is varied, can be designed to the triangular groove of angle, the degree of depth and length combination in any, refers to Fig. 7, Fig. 8, Fig. 9 and Figure 10.
Crescent gear pump of the present invention is designed with radially automatic floating compensation device of a ring gear pressure equaliser, axial automatic floating compensation device and two:
(1) ring gear pressure equaliser consists of the outer swing link 20 and the ring gear 17 that are provided with passage 201, detailed process is as follows: refer to Fig. 4, I is low pressure area, II is transition zone, ⅢShi pressure oscillation district, IV is zone of high pressure, V is trigonum, low pressure area I is positioned at low-pressure cavity 33, pressure oil by the passage 201 on outer swing link 20 and groove 202Jiang pressure oscillation district III is transported to transition zone II in advance, make transition zone II shift to an earlier date build-up pressure, in transition zone II, ring gear is formed to a power, making a concerted effort of the hydraulic coupling that rebalancing ring gear was subject to originally and gear mesh force, greatly reduce the active force of ring gear to the pump housing, effectively protect the oil film between ring gear and the pump housing, guarantee the normal lubricated of ring gear, thereby assurance part is normally worked under high pressure conditions.
(2) axial automatic floating compensation device is by left thrust plate 24, right thrust plate 14, left fixing ring 12, right fixing ring 11, profiled slot on left inside cover plate 25 and the profiled slot on right inside cover plate 7 form, specifically be achieved in that when profiled slot that the left thrust plate 24 of high pressure oil by ring gear bi-side and the oil through on right thrust plate 14 34 flow on left inside cover plates 25 and right inside cover plate 7, pressure oil acts on left inside cover plate 25 and right inside cover plate 7, the opposite force of pressure oil acts on left thrust plate 24 and right thrust plate 14, make left thrust plate 24 and right thrust plate 14 be close to all the time ring gear bi-side.
(3) two radially automatic floating compensation device is respectively: by oil outlet groove 31, ring gear 17 and hyperbaric chamber 32, form a radially automatic floating compensation device, by interior swing link 19, outer swing link 20, special-shaped locating stud 21, spring sheet 22 and Stamping Steel Ribbon 23, form another radially automatic floating compensation device.Above-mentioned two radially automatic floating compensation be achieved in that one, pressure oil in hyperbaric chamber 32 radially acts on gear 38, ring gear 17, interior swing link 19, outer swing link 20 and the pump housing 15 simultaneously, when the projection plane area of oil outlet groove 31 is slightly less than the projection plane area of hyperbaric chamber 32 on the pump housing 15, make ring gear 17 be close to all the time the pump housing 15 internal surfaces; They are two years old; Pressure oil in hyperbaric chamber 32 radially acts on gear 38, ring gear 17, interior swing link 19 and outer swing link 20 simultaneously, when pressure oil acts on surperficial between interior swing link 19 and outer swing link 20, make the internal surface of interior swing link 19 be close to all the time the cylindrical of gear 38, the outer surface of outer swing link 20 is close to the inner circle of ring gear 17 all the time, wherein, hyperbaric chamber 32 is comprised of gear 38, ring gear 17, interior swing link 19, outer swing link 20, special-shaped locating stud, left thrust plate 24 and right thrust plate 14.
Hydraulic coupling and gear mesh force that ring gear pressure equaliser active balance ring gear is suffered, reduce the active force of ring gear to the pump housing, reduce the wearing and tearing of ring gear outer surface and pump housing internal surface, realize delivery pressure when higher crescent gear pump can normally work for a long time, greatly extend the life-span of gear pump; By an axial automatic floating compensation device and two radially automatic floating compensation device realize the automatic floating after wearing and tearing between ring gear both ends of the surface gap and ring gear, gear and month block teeth and compensate, reduce the pressure loss, improve delivery pressure and working efficiency.
From the loading angle of crescent gear pump, be analyzed as follows:
Its pressure-plotting as shown in figure 11, wherein Q represents equivalent point, O is top circle, II is transition zone, and I is low pressure area, and W is the corresponding chord length (comprising district of equal value) in zone of high pressure, IV is zone of high pressure, for convenience of calculating, be easy to find out stressed rule, approximate hypothesis: 1, transition zone pressure is pressed the variation of straight line rule; 2, establishing that low pressure area is stressed is zero.
If transition zone angle is θ
1, zone of high pressure angle is θ
2, in order to use more easily computer graphics to find out stressed rule, the zone of high pressure of a θ angle of transition zone one-tenth of equal value, formula is as follows:
By formula, 1. try to achieve θ=21.5 °, by mapping, can obtain the corresponding chord length L in High Pressure district
1(internal hydraulic pressure masterpiece is for corresponding chord length on gear ring), as shown in figure 12, in figure, Q1 is line of contact, Q2 is the center line meshing completely, L in figure
2by compensating groove acts on corresponding chord length on gear ring, by computer drawing, measure: F
in=BL
1p 2.
Formula 2. in: F
infor internal hydraulic pressure power, B is the ring gear facewidth, L
1by the effect of internal hydraulic pressure power and corresponding chord length on gear ring, p is rated pressure (value 25), MPa.
F
flat=B
1l
2p 3.
Formula 3. in: F
flatfor compensating groove place pressure, B
1for balance groove width, L
2by the corresponding chord length of compensating groove, p is rated pressure (value 25), MPa.
For convenience of mapping, calculate, the concrete numerical value of three power is dwindled to 1200 times of corresponding straight length (units: mm), according to the composition principle of physics educational level as shown in figure 13, in figure, Q1 is line of contact, Q2 is the center line meshing completely, acts on size and the direction of three power of ring gear: (1) gear mesh force F
nthe direction of power is downward along line of contact; (2) internal hydraulic pressure power F
indirection is perpendicular to chord length L
1; (3) the pressure F of compensating groove place
flatdirection is perpendicular to chord length L
2.
Internal hydraulic pressure power F
inwith the pressure F of compensating groove place
flatmake a concerted effort for power F
1, gear mesh force F
nwith power F
1make a concerted effort for F, power F is F
n, F
flat, F
infinal making a concerted effort, direction as shown in figure 13, with compensating groove right-hand member end points angle be 33.3 °.
The above compensating groove is the ubiquitous parts of hydraulic gear pump, is positioned at gear pump body oil outlet position, L
2the pump housing in length and the gap of ring gear are greater than other positions, the suffered radial force of ring gear causing for improving pumping cavity and oil sucting cavity pressure gap.
When crescent gear pump is worked under high pressure conditions (25MP), the power F that is acted on pump housing endoporus by ring gear increases, point of action at power F there will be local rapid warm raising, after high pressure conditions certain time, local temperature reaches transition point, and oil viscosity drops to limiting value, and oil film rigidity starts to be destroyed, to cause direct friction between metal and metal, and in the short time, can make crescent gear pump scrap.
The present invention is middle or two side position open walk and grooves by outer swing link cylindrical, outer swing link cylindrical is near ring gear, keep each tooth cavity to form separate space, form zones of different (transition zone, fluctuation zone, zone of high pressure etc.), outer swing link passage and groove connect fluctuation zone and zone of high pressure, when ring gear rotates an angle, passage and groove and transition zone are connected, pressure oil is incorporated into transition zone fast, under the effect of pressure oil, transition region produces a power that acts on ring gear, this power is along with gear engagement position constantly changes in the variation at groove position, the fluid pressure balance producing on the one hand the original suffered F that makes a concerted effort of part ring gear, this hydraulic coupling is along with being engaged in zonule of ring gear swings on the other hand, thereby the suffered position of making a concerted effort F power position of ring gear is constantly changed, make oil film can not produce localized hyperthermia, realize the function of tempered oil film, the wear problem of ring gear and the pump housing under effective solution high workload pressure, guarantee that crescent gear pump works long hours under high workload pressure, kept low noise simultaneously, the features such as high efficiency, practical.
The present invention and external crescent gear pump important technological parameters relatively refer to table 1:
The comparison of table 1 crescent gear pump of the present invention and external product important technological parameters
Through verification experimental verification, the crescent gear pump that the discharge capacity of take is 50ml is example, when crescent gear pump working speed is 1500r/min, and when delivery pressure is 25Mp, 40 ℃ of liquid temperatures, efficiency is 95%, when test liquid temperature reaches 80 ℃, still can normally work; When delivery pressure reaches 35Mp, 40 ℃ of liquid temperatures, efficiency is 93%, when test liquid temperature reaches 80 ℃, still can keep normal work.
In sum, crescent gear pump of the present invention compared with prior art, three automatic floating compensation devices and a ring gear pressure equaliser have been adopted simultaneously, can effectively solve the wear problem of ring gear and the pump housing under high workload pressure, guarantee that crescent gear pump works long hours under high workload pressure, kept the features such as low noise, high efficiency simultaneously, practical.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (10)
1. a crescent gear pump, is characterized in that: comprise housing, gear shaft (16), ring gear (17) and swing link;
Described housing is for being connected the pump housing (15), left inside cover plate (25), left outside cover plate (26), right inside cover plate (7) and right outside cover plate (1) by stud bolt (5) integral body forming;
The internal surface of described left inside cover plate (25) and described right inside cover plate (7) is respectively equipped with composite sliding bearing (8); In the endoporus of described right outside cover plate (1), be provided with check ring (3), packing ring (4) and outside framework oil seal (2);
The upper end face of the described pump housing (15) is provided with filler opening (29), and its side is provided with oil outlet (30), and the surface of internal cavity connecting with described oil outlet (30) is provided with oil outlet groove (31);
Described gear shaft (16) is provided with left axle journal, gear (38) and right axle journal, described left axle journal is installed on the internal surface of left thrust plate (24) and composite sliding bearing (8), and described right axle journal is installed on the internal surface of right thrust plate (14), composite sliding bearing (8), spring flange (3), packing ring (4) and outside framework oil seal (2) and stretches out described right outside cover plate (1);
Between described left inside cover plate (25) and described left thrust plate (24), be provided with left fixing ring (12), between described right inside cover plate (7) and right thrust plate (14), be provided with right fixing ring (11); On described left thrust plate (24) and described right thrust plate (14), be equipped with oil through (34), described right thrust plate (14) is provided with the eyebrow groove (35) being communicated with described oil through (34);
Described ring gear (17) is arranged on the internal surface of the described pump housing (15), and is meshed with described gear (38); The outer annulus edge of described ring gear (17) is evenly equipped with the turnover oilhole (39) at 1-2 row central position and radial offset α angle;
Described swing link comprises interior swing link (19) and outer swing link (20), the cylindrical of the internal surface of described interior swing link (19) and described gear (38) fits tightly, and the inner circle of the outer surface of described outer swing link (20) and described ring gear (17) fits tightly; The position that described outer swing link (20) is meshed with described ring gear (17) is radially provided with groove (202).
2. crescent gear pump according to claim 1, is characterized in that: described interior swing link (19) and outer swing link (20) are all arranged on special-shaped locating stud.
3. crescent gear pump according to claim 1, is characterized in that: described groove (202) is arranged on the middle part of described outer swing link (20), and the quantity of described groove (202) is more than or equal to 1.
4. crescent gear pump according to claim 3, is characterized in that: described groove (202) is triangular groove, and the transverse cross-sectional profile of triangular groove is V-type, and its v-angle (A) is 45 °-75 °, and its length (L) is 5-10mm.
5. crescent gear pump according to claim 4, is characterized in that: described groove (202) is 2 symmetrically arranged triangular grooves.
6. crescent gear pump according to claim 5, it is characterized in that: on described outer swing link (20), be also provided with passage (201), two described grooves (202) are symmetricly set on described passage (201) above and below, and the inside of described passage (201) communicates with the inside of described groove (202); Described in the distance between center line of described passage (201), the perpendicular distance (d1) of the upper-end surface of outer swing link (20) is 15-25mm, and the perpendicular distance (d2) of the left and right center line of the described outer swing link of distance (20) is 0-10mm.
7. crescent gear pump according to claim 1, it is characterized in that: on the left surface of described outer swing link (20) and right flank, be arranged with opening slot (203), the width (d3) of described opening slot (203) is 1-5mm, its degree of depth is 0.5-2.0mm, and the distance (d4) of outer swing link (20) upper-end surface is 15-25mm described in its center line-spacing; Described groove (202) is symmetricly set on the both sides of described outer swing link (20), and the inside of described groove (202) communicates with the inside of described opening slot (203) respectively.
8. crescent gear pump according to claim 7, is characterized in that: described groove (202) is triangular groove, and its quantity is more than or equal to 1, and its length (L) is 5-10mm.
9. crescent gear pump according to claim 8, is characterized in that: described triangular groove is 2, and it is symmetricly set on the above and below of described opening slot (203).
10. crescent gear pump according to claim 1, is characterized in that: described α angle is 10 °-20 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410038255.7A CN103727026B (en) | 2014-01-26 | 2014-01-26 | A kind of crescent gear pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410038255.7A CN103727026B (en) | 2014-01-26 | 2014-01-26 | A kind of crescent gear pump |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103727026A true CN103727026A (en) | 2014-04-16 |
| CN103727026B CN103727026B (en) | 2016-03-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410038255.7A Expired - Fee Related CN103727026B (en) | 2014-01-26 | 2014-01-26 | A kind of crescent gear pump |
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| Country | Link |
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| CN (1) | CN103727026B (en) |
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| CN108644104A (en) * | 2018-05-17 | 2018-10-12 | 徐工集团工程机械有限公司 | The valve plate and plunger type fluid machinery of plunger type fluid machinery |
| CN111250936A (en) * | 2020-03-12 | 2020-06-09 | 上海瑙克科技发展有限公司 | Gear pump for bending machine and manufacturing method thereof |
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| CN203730305U (en) * | 2014-01-26 | 2014-07-23 | 潘光奇 | Internally-engaged gear pump |
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| DE102005044576A1 (en) * | 2005-09-17 | 2007-03-22 | Voith Turbo Gmbh & Co. Kg | Internal gear pump |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108644104A (en) * | 2018-05-17 | 2018-10-12 | 徐工集团工程机械有限公司 | The valve plate and plunger type fluid machinery of plunger type fluid machinery |
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| CN111250936A (en) * | 2020-03-12 | 2020-06-09 | 上海瑙克科技发展有限公司 | Gear pump for bending machine and manufacturing method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103727026B (en) | 2016-03-23 |
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