CN103939333B - A kind of inside gearing pump with radial compensation - Google Patents

A kind of inside gearing pump with radial compensation Download PDF

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Publication number
CN103939333B
CN103939333B CN201410168460.5A CN201410168460A CN103939333B CN 103939333 B CN103939333 B CN 103939333B CN 201410168460 A CN201410168460 A CN 201410168460A CN 103939333 B CN103939333 B CN 103939333B
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China
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block teeth
solar month
teeth
days
month
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CN201410168460.5A
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Chinese (zh)
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CN103939333A (en
Inventor
陈晖�
王健
王相见
郭善新
陈传铭
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福州大学
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Publication of CN103939333A publication Critical patent/CN103939333A/en
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Abstract

The present invention discloses a kind of inside gearing pump with radial compensation, is made up of pump case, gear shaft, ring gear, side plate, sliding surface bearing and radial compensator. Radial compensator is arranged in the space between ring gear and gear shaft, comprises block teeth in the solar month, solar month of 30 days block teeth, sealed roller, spacing pin and small clevis pin with head. The present invention is compensated by the self-adaptation of oil storage passage and teeth groove inner fluid pressure reduction, and solar month of 30 days block teeth were radially moved in block teeth and the two is close along circular arc face force in radial size in the solar month, eliminates the inclined mill defect of the block teeth of the moon in traditional compensation system. In addition, in the teeth groove of internal-external gear, fluid is through the elongated oil duct of bimonthly block teeth both ends of the surface, in oil storage passage multistage cross after export, avoid different pressures fluid import high pressure area formed temporary impact, flow and pressure pulsation are low.

Description

A kind of inside gearing pump with radial compensation
Technical field
The present invention relates to a kind of inside gearing pump, particularly relates to the inside gearing pump under a kind of band radial compensation high pressure operating mode.
Background technology
High-pressure hydraulic has a wide range of applications in many equipment such as casting machine, injection moulding machine and swaging machine. Currently, with the development of the high-end equipment such as military equipment and marine drilling platform, the further high-pressure trend of hydraulic efficiency system becomes one inexorable trend, and wherein maximum challenge is the development of high-quality high-pressure pump.
The outstanding features such as inside gearing pump has that noise is low, pocketed oil is little, compact construction and good stability and be widely used in all kinds of engineering machinery, but still cannot meet the work requirements of Superhigh Pressure Hydraulic System (such as more than 35MPa) at present. The internal leakage that its major cause is under high pressure pump strengthens rapidly, and the gap being mainly manifested between gear teeth tips and moon block teeth is leaked, gear end face leaks three aspects with the end play leakage of side sheet room and the gap of two gear teeth face engagement places. Therefore, in order to adapt to the development of high-end equipment, develop novel high pressure tiny leakage inside gearing pump very necessary.
Gap between gear teeth tips and moon block teeth is leaked and is suppressed to be one of key factor breaking through inside gearing pump high-pressure trend, adopts radial compensator to be the solution of its main flow. Such as: (1) adopts monolithic moon block teeth, the pump housing is fixedly connected with (such as patent 200420021259.6) by single pin with moon block teeth, month block teeth be fixed value with gear tip clearance distance, this device there is the simple advantage of structure but the moon block teeth pump spillage afterwards of wearing and tearing sharply rise, it may also be useful to the life-span is short. (2) monolithic moon block teeth are adopted, a pin is worn in inside, month block teeth can rotate around pin, its both sides contact with the tooth top of gear shaft with ring gear respectively, thus realize radial compensation function (such as patent US20100233005 and patent 201210429565.2), the program because of the moon block teeth serious wear and reduce its work-ing life.
Gap for reducing further between gear teeth tips and moon block teeth is leaked, and in recent years proposes the novel radial compensation hydro-pump with bimonthly block teeth (such as patent 201310108067.2 and patent 201120192876.2). By introducing pressure oil in the space between two panels moon block teeth, force moon block teeth to open and be supported on respectively on ring gear and gear shaft tooth top, thus realize radial compensation. This radial compensator greatly reduces the gap between gear teeth tips and moon block teeth and leaks, and obtains accreditation in the world and promotes, but there are following some shortcomings, mainly shows as:
1) in toothed gear pump the moon block teeth circumferential direction produce partially mill because of unbalance stress, strengthen the internal leakage of pump, become the bottleneck of its further high-pressure trend of restriction. The moon, block teeth were near the side of high pressure chest under action of hydraulic force, forced bimonthly block teeth respectively to outer swing, and its outer end circle arc support is in internal-external gear tooth top surface. Under high stress, the abrasion of contact position aggravates and increases the gap between moon block teeth all the other position and tooth tops, and internal leakage becomes big thereupon, and the pressure thus constraining pump improves.
2) mode that single side high pressure supports formed the interior moon block teeth and gear teeth tips between non-homogeneous gap, thus easily cause vibration and noise. With the moon, the partial wear of block teeth is bad, between tooth top and moon block teeth, the gap difference of different positions increases thereupon, force feed liquid is had to strengthen through non-homogeneous gap unstable, easily initiation moon block teeth vibrate and cause the noise of pump to raise (referenced patent US2008226484), weaken the advantage of the low vibration lower noise of inside gearing pump.
3) moon block teeth and gear teeth tips be few tooth contact, easy deformation under high pressure, the working reliability deficiency of pump. The moon, the partial wear of block teeth was bad, and the many tooth contacts state transfer impelling moon block teeth and gear teeth tips is list/bis-tooth contact state. The two suffered stress significantly promotes because stressed area reduces, and impels the moon block teeth generation deformation of high pressure area, easily causes radial compensation and lost efficacy, thus causes the hydro-pump cannot normal operation.
4) when internal wheel teeth groove and outer rotor teeth groove enter high pressure area, the two-way oil liquid pressure of remittance is uneven, will produce flow and pressure pulsation, it is difficult to meet the requirement that high-precision liquid exports. After fluid enters internal wheel teeth groove and outer rotor teeth groove respectively from low pressure area, the pressure at two places will produce non-homogeneous rising, and the fluid in internal-external gear imports high pressure area jointly with gear rotation. Owing to internal wheel teeth groove fluid and outer rotor teeth groove inner fluid pressure are uneven, flow and pressure pulsation (referenced patent US2008226484) will be produced along with gear pair rotates.
Summary of the invention
The problems referred to above have been improved by the present invention, and designing one, to have the abrasion of moon block teeth little, and the life-span is long, and pump housing working reliability is strong, has the toothed gear pump of self-adaptation pressure difference compensation.
Specific embodiment of the invention content is: a kind of inside gearing pump with radial compensation, comprise a ring gear and one and the intermeshing outer rotor of ring gear tooth top, described outer rotor is supported in pump case around paralleling to the axis rotationally, the teeth portion of ring gear outer rotor surrounds both sides and narrows gradually and the crescent-shaped space of symmetry, crescent shape abaculus it is provided with in described crescent-shaped space, crescent shape abaculus makes crescent-shaped space be divided into high pressure area and low pressure area, it is characterized in that: described crescent shape abaculus comprises an external arc and ring gear tooth top fits solar month block teeth and the solar month of 30 days block teeth that fit of Inner arc and outer rotor tooth top, described solar month of 30 days dental inlay inside the solar month block teeth cambered surface and leave gap, described solar month of 30 days block teeth and the solar month block teeth axial cross section be provided with the oil duct being interconnected.
Further, described solar month of 30 days block teeth are radially provided with multipair through hole to form oil duct with block teeth in the solar month, and paired through hole is towards the corresponding setting of opening of contact surface.
Further, external arc surface between described solar month of 30 days block teeth adjacent through-holes is provided with tetragon groove vertically, the sealed roller of the axially elastic columnar shape of laying it is placed with in described tetragon groove, described sealed roller by solar month of 30 days block teeth and the solar month block teeth gap space segmentation form multistage oil storage passage, described paired solar month of 30 days block teeth and the solar month the paired through hole of block teeth through oil storage channel connection.
Further, the described solar month is provided with arc groove in the middle part of block teeth, the curved columnar structure of solar month of 30 days block teeth, and the solar month, two inner-wall surfaces of block teeth groove were parallel surface, on axial direction due solar month of 30 days block teeth two outer sides and the solar month block teeth groove inner-wall surface be running fit.
Further, described solar month of 30 days block teeth and the solar month block teeth there is equal axial length, the axial length of described sealed roller be not more than solar month of 30 days block teeth and the solar month block teeth axial length.
Further, the width of solar month of 30 days block teeth oil duct is 1 ~ 9mm, and the solar month, the width of block teeth oil duct was 0.8 ~ 8.5mm.
Further, the width of oil storage passage is 0.1 ~ 6mm.
Compared with prior art, the present invention has following useful effect:
1) in toothed gear pump the moon block teeth radially move, circumference uniform force, eccentric wear free, thus can further improve the pressure of inside gearing pump. Month block teeth radially move and contacts with gear teeth tips evenly, it is preferable that oil channel structure can keep a moon block teeth circumference uniform force, thus the inclined mill defect of elimination conventional radial compensation system.
2) moon block teeth and gear teeth tips between gap evenly, vibrate little, working stability, reduces the noise of hydro-pump. The novel compensator moved radially, makes moon block teeth contact evenly with gear teeth tips, eliminates the vibration that moon block teeth cause because of gap inequality, while promoting the stability of radial compensator, reduces the work noise of toothed gear pump under high pressure operating mode.
3) moon block teeth and gear teeth tips be many teeth evenly by power, the working reliability of pump is strong. By having the oil duct design of self-adaptation pressure difference compensation, make moon block teeth along the circumferential direction uniform force, and it is many tooth contacts radially going up with gear teeth tips, it is to increase its resistance to compression ability under high pressure operating mode.
4) when entering high pressure area via internal wheel teeth groove and outer rotor teeth groove, the two-way oil liquid pressure of remittance is impartial, Pulse of flow and pressure is little. In the teeth groove of internal-external gear, fluid is through the elongated oil duct of bimonthly block teeth both ends of the surface, in oil storage passage multistage cross after export, avoid different pressures fluid import high pressure area formed temporary impact, flow and pressure pulsation significantly reduce.
Accompanying drawing explanation
Fig. 1 is the exploded perspective view of toothed gear pump overall structure of the present invention.
Fig. 2 is the front schematic view of toothed gear pump internal structure of the present invention.
Fig. 3 be Fig. 2 A-A to diagrammatic cross-section.
Fig. 4 is the partial enlargement schematic diagram of radial compensator.
Fig. 5 is the schematic diagram after Fig. 3 removes pump case.
Fig. 6 is the oil state schematic diagram in working process of the present invention.
Fig. 7 is block teeth inside and outside circle arc voltage power schematic diagram in the solar month.
Fig. 8 is solar month of 30 days block teeth inside and outside circle arc voltage power schematic diagram.
In figure: 1, left pump cover, 2, a left side connects lid, and 3, the pump housing, 4, pump housing inwall, 5, outer rotor, 6, outer rotor first teeth groove, 7, outer rotor the 2nd teeth groove, 8, outer rotor the 3rd teeth groove, 9, outer rotor the 4th teeth groove, 10, outer rotor tooth top, 11, ring gear, 12, ring gear outer wall, 13, ring gear oil through, 14, ring gear first teeth groove, 15, ring gear the 2nd teeth groove, 16, ring gear the 3rd teeth groove, 17, ring gear the 4th teeth groove, 18, ring gear the 5th teeth groove, 19, ring gear tooth top, 20, steady brace, 21, left back pressure cavity pad, 22, right back pressure cavity pad, 23, left plate, 24, right side plate, 25, side plate pin-and-hole, 26, threaded stud, 27, solar month of 30 days block teeth, 28, solar month of 30 days block teeth first oil duct, 29, solar month of 30 days block teeth the 2nd oil duct, 30, solar month of 30 days block teeth the 3rd oil duct, 31, solar month of 30 days block teeth Inner arc, 32, solar month of 30 days block teeth external arc, 33, tetragon groove, 34, the solar month block teeth, 35, little pin-and-hole, 36, the solar month block teeth A end face, 37, the solar month block teeth groove, 38, the solar month block teeth external arc, 39, the solar month block teeth Inner arc, 40, the solar month block teeth first oil duct, 41, the solar month block teeth the 2nd oil duct, 42, the solar month block teeth the 3rd oil duct, 43, first oil storage passage, 44, 2nd oil storage passage, 45, 3rd oil storage passage, 46, spacing pin, 47, spacing pin A face, 48, sealing rod, 49, small clevis pin with head, 50, sliding surface bearing, 51, the right side connects lid, and 52, right pump cover, 53, pad, 54, nut, 55, lip seal circle, 56, oil-in, 57, oil outlet, 58, low pressure area, 59, high pressure area, 60, compensating groove, 61, V-groove.
Embodiment
Below in conjunction with drawings and Examples, the specific embodiment of the present invention is described.
Fig. 1 ~ 5 illustrate the structural representation of the present invention. The inside gearing pump of a kind of band radial compensation, comprise a ring gear 11 and an outer rotor 5 engaged with ring gear tooth top 19, outer rotor 5 can be supported among pump case around paralleling to the axis rotationally, therefore the teeth portion of two gears surrounds both sides and narrows gradually and the crescent-shaped space of symmetry, be furnished with block teeth 34 and solar month of 30 days block teeth 27 in the solar month in the side in this space, the solar month block teeth 34 and solar month of 30 days briquetting 27 make pump inside be divided into high pressure area 59 and low pressure area 58.
In Fig. 1, the pump case of inside gearing pump connects lid 2 by the pump housing 3, a left side, the right side connects lid 51, left pump cover 1, right pump cover 52 form, the pump housing 3 in described pump case, a left side connect lid 2 and the right side connects lid and 51 locates by steady brace 20, being connected by pump case by threaded stud 26 is an entirety, is locked by pad 53 and nut 54. Pump case inside be provided with outer rotor 5, ring gear 11, solar month of 30 days block teeth 27, the solar month block teeth 34, spacing pin 46, sealed roller 48, small clevis pin with head 49, left plate 23, left back pressure cavity pad 21, right side plate 24, right back pressure cavity pad 22, sliding surface bearing 50. A left side connects lid 2 and the right side connects in lid 51 inner chambers and respectively lays a sliding surface bearing 50, and it coordinates for transition fit, and outer rotor 5 is also transition fit through sliding surface bearing 50 and its cooperation.
In Fig. 2 ~ 3, ring gear 11 is placed in the pump housing 3, ring gear outer wall 12 and pump housing inwall 4 running fit, the axis of outer rotor 5 and ring gear 11 is arranged to be parallel to each other and staggers, the solar month block teeth 34 and solar month of 30 days block teeth 27 be distributed between ring gear 11 and outer rotor 5, the solar month block teeth 34, solar month of 30 days block teeth 27 and sealed roller 48 there is equal axial length, and their left and right both ends of the surface contact with the end face of left plate 23 and right side plate 24 respectively.
In Fig. 3, when outer rotor 5 rotates counterclockwise, the gear pair in low pressure area 58 departs from engagement gradually, and this areal pressure reduces, and fluid sucks through oil-in 56, enters low pressure area 28 by ring gear oil through 13. Subsequently, fluid enters outer rotor first teeth groove 6 and ring gear first teeth groove 14, and along with gear rotates, fluid is brought into high pressure area 59, progresses into engagement with the gear pair in high pressure area 59, and oil liquid pressure raises, and fluid is extruded by oil outlet 57.
Fig. 4 is the partial enlargement schematic diagram of radial compensator. Radial compensator by the solar month block teeth 34, solar month of 30 days block teeth 27, sealed roller 48, small clevis pin with head 49 and spacing pin 46 form. The axial length of spacing pin 46 is greater than the axial length of small clevis pin with head 49, and the axial length of small clevis pin with head 49 is greater than the axial length of block teeth 34 in the solar month; The solar month block teeth 34 axial length, the axial length of solar month of 30 days block teeth 27 and sealed roller 48 axial length equal. The solar month, block teeth 34 were the groove structure of arc column for middle part, axially both ends of the surface are processed with block teeth first oil duct 40 in the solar month, the solar month block teeth the 2nd oil duct 41, the solar month block teeth the 3rd oil duct 42. Solar month of 30 days block teeth 27 are arc columnar structure. It is processed with four tetragon grooves 33 in solar month of 30 days block teeth external arc 32, and it is processed with solar month of 30 days block teeth first oil duct 28, solar month of 30 days block teeth the 2nd oil duct 29, solar month of 30 days block teeth the 3rd oil duct 30 in the axial both ends of the surface of little crescent moon 27. The solar month, two inner-wall surfaces of block teeth groove 37 were parallel surface, on axial direction due solar month of 30 days block teeth 27 two outer sides and the solar month block teeth groove 37 inner-wall surface be running fit.
There is a spacing pin 46 at block teeth A end face 36 in solar month place, it is an imperfect right cylinder, cylindrical surface has been cutd open two faces vertically, two faces are mutually 35 degree, spacing pin A face 47 36 contacts with block teeth A end face in the solar month, the side plate pin-and-hole 25 that spacing pin 46 represents with dotted line on left side plate, limits, by spacing pin 46, the degree of freedom that the solar month, block teeth 34 moved to low pressure area 58. The solar month block teeth 34 have a little pin-and-hole 35 near side, low pressure area 58, small clevis pin with head 49 is inserted in little pin-and-hole 35 simultaneously, the small clevis pin with head 49 that part exceeds little pin-and-hole 35 contacts with side plate pin-and-hole 35, limits, by small clevis pin with head 49, the degree of freedom that the solar month, block teeth 34 moved to high pressure area 59. The solar month block teeth Inner arc 39 has one the solar month block teeth groove 37, solar month of 30 days block teeth 27 are placed in block teeth groove 37 in the solar month, limit solar month of 30 days block teeth 27 by block teeth groove 37 in the solar month and radially move, solar month of 30 days block teeth external arc 32 has several tetragons grooves 33. By placing the sealed roller 48 of elastic columnar shape in tetragon groove 33, the gap formed between solar month of 30 days block teeth external arc 32 and big crescent moon groove 37 is separated into length the first oil storage passage 43 not etc., the 2nd oil storage passage 44 and the 3rd oil storage passage 45, when sealed roller 48 is subject to oil storage passage inner fluid pressure, sealed roller 48 respectively with the solar month block teeth groove 37 and the face of tetragon groove 33 tangent, thus ensure stopping property and the independence of each oil storage passage.
In Figure 5, the solar month, block teeth external arc 38 was close on multiple tooth top covered by it uniformly, the solar month block teeth 34 and ring gear tooth top 19, form ring gear first teeth groove 14, ring gear the 2nd teeth groove 15, ring gear the 3rd teeth groove 16, ring gear the 4th teeth groove 17 and ring gear the 5th teeth groove 18, and the solar month, block teeth external arc 38 was concentric with ring gear tooth top 19. Solar month of 30 days block teeth Inner arc 31 is close on multiple tooth top covered by it uniformly, solar month of 30 days block teeth 27 and outer rotor tooth top 10 form outer rotor first teeth groove 6, outer rotor the 2nd teeth groove 7, outer rotor the 3rd teeth groove 8 and outer rotor the 4th teeth groove 9, and solar month of 30 days block teeth Inner arc 31 is concentric with outer rotor tooth top 10. In figure, dotted portion is the compensating groove 60 on right side plate 24 end face and V-groove 61, V-groove 61 is three chamfered grooves reduced gradually to low pressure area 58 degree of depth by high pressure area 59, the part fluid of high pressure area 59 can by V-groove 61 adverse current to the size moon block teeth and internal-external gear between teeth groove, play pre-loading effect.
Fig. 6 is the oil state schematic diagram in working process of the present invention. In figure, solid line represents fluid from low pressure area 58 to the following current of high pressure area 59; Dotted line represents fluid from high pressure area 59 to the adverse current of low pressure area 58, and this kind of adverse current serves the effect of pre-loading between low pressure area 58 and high pressure area 59; Line is more long, and to represent oil liquid pressure more big, otherwise oil liquid pressure is more little. When outer rotor 5 and ring gear 11 are rotated counterclockwise, the fluid in low pressure area 58 is divided into two-way, and the first via enters high pressure area 59 after flowing through outer rotor first teeth groove 6, outer rotor the 2nd teeth groove 7, outer rotor the 3rd teeth groove 8, outer rotor the 4th teeth groove 9 respectively; 2nd tunnel flows through ring gear first teeth groove 14 respectively, after ring gear the 2nd teeth groove 15, ring gear the 3rd teeth groove 16, ring gear the 4th teeth groove 17, ring gear the 5th teeth groove 18, enters high pressure area 59. Composition graphs 4, with the fluid in the rotation of outer rotor 5 and ring gear 11, outer rotor the 2nd teeth groove 7 and ring gear the 2nd teeth groove 15, respectively by solar month of 30 days block teeth first oil duct 28 and the solar month block teeth first oil duct 40, enter the first oil storage passage 43; Fluid in outer rotor the 3rd teeth groove 8 and ring gear the 4th teeth groove 17, respectively by solar month of 30 days block teeth the 2nd oil duct 29 and the solar month block teeth the 2nd oil duct 41, enter the 2nd oil storage passage 44; Fluid in outer rotor the 4th teeth groove 9 and ring gear the 5th teeth groove 18, respectively by solar month of 30 days block teeth the 3rd oil duct 30 and the solar month block teeth the 3rd oil duct 42, enter the 3rd oil storage passage 45. This kind utilizes multistage microchannel that the teeth groove of internal-external gear is carried out the mode of UNICOM, the pressure of outer rotor and ring gear respective teeth groove location is made to trend towards equalization, thus reduce the pressure difference importing high pressure area 59 two-way oil circuit, significantly weaken the flow because two oil circuit pressure reduction cause and pressure pulsation.
Fig. 7 illustrates the pressure profile of circular arc inside and outside block teeth 34 in the solar month. In figure, ring gear first teeth groove 14 inner fluid pressure isp 1, ring gear the 2nd teeth groove 15 and the first oil storage passage 43 inner fluid pressure arep 2, ring gear the 3rd teeth groove 16 inner fluid pressure isp 3, ring gear the 4th teeth groove 17 and the 2nd oil storage passage 44 inner fluid pressure arep 4, ring gear the 5th teeth groove 17 and the 3rd oil storage passage 45 inner fluid pressure arep 5. Pressure magnitude relationship isp 5>p 4>p 3>p 2>p 1, and pressure declines significantly step by step. Due to close high pressure area 59, pressurep 5Obviously higher than pressurep 4, and areaA'5It is greater than areaA 5, therefore by power on the right side of block teeth in the solar month 34p 5 A'5>p 5 A 5+p 4 A 4. With reason, by power in the middle part of solar month block teeth 34p 4 A'4>p 3 A 3+p 2 A 2, by power on the left of solar month block teeth 34p 2 A'2>p 1 A 1. Therefore, briquetting in the solar month 34 bears the radial effect power pointing to lower section. By the structural parameter of block teeth in preferred solar month, especially preferably active areaA 1~A 5WithA'2~A'5Size, can make each section of Inner arc of block teeth 34 in the solar month is subject to the approximately equalised reactive force of size, thus effectively suppress the inclined mill of block teeth 34 in the solar month, and significantly promote the stability that the solar month, block teeth 34 worked.
Fig. 8 illustrates the pressure profile of circular arc inside and outside solar month of 30 days block teeth 27. In figure, outer rotor first teeth groove 6 inner fluid pressure isp 0, outer rotor the 2nd teeth groove 7 and the first oil storage passage 43 inner fluid pressure arep 7, outer rotor the 3rd teeth groove 8 and the 2nd oil storage passage 44 inner fluid pressure arep 8, outer rotor the 4th teeth groove 9 and the 3rd oil storage passage 45 inner fluid pressure arep 9. Pressure magnitude relationship isp 9>p 8>p 7>p 6, and pressure declines significantly step by step. Pressurep 9Obviously higher than pressurep 8, and areaA'9It is greater than areaA 9, therefore by power on the right side of solar month of 30 days block teeth 27p 9 A'9>p 9 A 9+p 8 A 8. With reason, by power in the middle part of moon block teethp 8 A'8>p 7 A 7, by power on the left of moon block teethp 7 A'7>p 6 A 6. Therefore, solar month of 30 days briquetting 27 bears the radial effect power pointing to top. By the structural parameter of preferred solar month of 30 days block teeth, especially preferably active areaA 6~A 9WithA'7~A'9Size, can make each section of external arc of solar month of 30 days block teeth 27 is subject to the approximately equalised reactive force of size, thus effectively suppress solar month of 30 days block teeth 27 inclined mill, and significantly promote solar month of 30 days block teeth 27 work stability.

Claims (6)

1. one kind has the inside gearing pump of radial compensation, comprise a ring gear and one and the intermeshing outer rotor of ring gear tooth top, described outer rotor is supported in pump case around paralleling to the axis rotationally, the teeth portion of ring gear and outer rotor surround both sides and narrow gradually and the crescent-shaped space of symmetry, crescent shape abaculus it is provided with in described crescent-shaped space, crescent shape abaculus makes crescent-shaped space be divided into high pressure area and low pressure area, it is characterized in that: described crescent shape abaculus comprises an external arc and ring gear tooth top fits solar month block teeth and the solar month of 30 days block teeth that fit of Inner arc and outer rotor tooth top, described solar month of 30 days block teeth are embedded in cambered surface inside block teeth in the solar month and leave gap, described solar month of 30 days block teeth and the solar month block teeth axial cross section be provided with the oil duct being interconnected, solar month of 30 days block teeth and the solar month block teeth be radially provided with multipair through hole to form oil duct, described paired through hole is arranged towards the opening correspondence of contact surface.
2. a kind of inside gearing pump with radial compensation according to claim 1, external arc surface between described solar month of 30 days block teeth adjacent through-holes is provided with tetragon groove vertically, the sealed roller of the axially elastic columnar shape of laying it is placed with in described tetragon groove, described sealed roller by solar month of 30 days block teeth and the solar month block teeth gap space segmentation form multistage oil storage passage, described solar month of 30 days block teeth and the solar month the paired through hole of block teeth through oil storage channel connection.
3. a kind of inside gearing pump with radial compensation according to claim 1, the described solar month is provided with arc groove in the middle part of block teeth, the curved columnar structure of solar month of 30 days block teeth, the solar month, two inner-wall surfaces of block teeth groove were parallel surface, on axial direction due solar month of 30 days block teeth two outer sides and the solar month block teeth groove inner-wall surface be running fit.
4. a kind of inside gearing pump with radial compensation according to claim 2, described solar month of 30 days block teeth and the solar month block teeth there is equal axial length, the axial length of described sealed roller be not more than solar month of 30 days block teeth and the solar month block teeth axial length.
5. a kind of inside gearing pump with radial compensation according to claim 1, the width of solar month of 30 days block teeth oil duct is 1 ~ 9mm, and the solar month, the width of block teeth oil duct was 0.8 ~ 8.5mm.
6. a kind of inside gearing pump with radial compensation according to claim 2, the width of described oil storage passage is 0.1 ~ 6mm.
CN201410168460.5A 2014-04-25 2014-04-25 A kind of inside gearing pump with radial compensation CN103939333B (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104454511B (en) * 2014-11-13 2016-09-07 福州大学 A kind of crescent gear pump being applicable to high-pressure high-flow
CN105673480B (en) * 2016-02-12 2018-03-16 周佰芹 A kind of crescent gear motor
WO2019071982A1 (en) * 2017-10-13 2019-04-18 南京蒙福液压机械有限公司 Hydraulic internal gear pump
CN107725357B (en) * 2017-12-07 2019-06-25 江西应用技术职业学院 A kind of crescent gear pump suitable for Water hydraulics

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DE1817165A1 (en) * 1968-12-27 1970-07-09 Daimler Benz Ag Internally toothed gear pump, especially for the pressure medium supply of automatically shifting motor vehicle transmissions
US4184820A (en) * 1978-02-16 1980-01-22 Karl Eickmann Internal gear device with balancing recesses in the insert member
DE4328733C1 (en) * 1993-08-26 1994-09-08 Voith Gmbh J M Internal-gear pump
CN102400907B (en) * 2011-11-08 2014-11-19 重庆大学 Internal gear pump
DE102012001462A1 (en) * 2012-01-25 2013-07-25 Robert Bosch Gmbh Internal gear pump comprises control bevel, which is provided in area of sealing segment side facing hollow wheel, and is extended out in peripheral direction of hollow wheel and broadens opening area of control groove
CN102619746A (en) * 2012-02-29 2012-08-01 盐城市驰英机械科技有限公司 Internal gear pump

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