CN104929930A - Gear pump capable of achieving high-pressure flow and low-pressure flow convergence and distribution - Google Patents
Gear pump capable of achieving high-pressure flow and low-pressure flow convergence and distribution Download PDFInfo
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- CN104929930A CN104929930A CN201510340665.1A CN201510340665A CN104929930A CN 104929930 A CN104929930 A CN 104929930A CN 201510340665 A CN201510340665 A CN 201510340665A CN 104929930 A CN104929930 A CN 104929930A
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Abstract
The invention relates to a gear pump capable of achieving high-pressure flow and low-pressure flow convergence and distribution. The gear pump capable of achieving high-pressure flow and low-pressure flow convergence and distribution comprises a first pump body and a second pump body, wherein the first pump body and the second pump body are connected through a convergence pump body. An oil inlet and an oil outlet are formed in the convergence pump body. An oil inlet channel and an oil outlet channel are formed in the first pump body and the second pump body. An oil control channel is formed in the inner wall of the oil outlet and is communicated with a regulation channel. A one-way valve is arranged at the position, close to the second pump body, of the oil outlet of the oil outlet channel. The regulation channel is arranged between the oil inlet channel and the oil outlet channel, a regulation device is arranged in the regulation channel, and the regulation device regulates the oil inlet channel and the oil outlet channel to be communicated or blocked in the second pump body. When pressure in the oil control channel is low, a hydraulic control valve in the second pump body cannot be pushed open by a control piston in the regulation channel; when pressure in the oil control channel rises, the hydraulic control valve in the second pump body is pushed open by the control piston, so that the unloading process is completed; unloading pressure is obtained by adjusting a pressure adjustment spring; the structure is simple, production is easy, and cost is low.
Description
Technical field
The invention belongs to gear pump technical field, relate to a kind of gear pump that can realize high low pressure point interflow.
Background technique
Common duplex pump at least will have three hydraulic fluid ports, when high-pressure work, due between two gear pumps to realize low pressure time large pump Self-tipping must add position limit switch and solenoid directional control valve could realize, its overall control element is more, pipeline and circuit more complicated and need electrical control to realize, complex structure, be not easy to produce, and cost of production is higher.
Summary of the invention
The present invention, in order to overcome the defect of prior art, devises the gear pump that simple, reasonable in design, the easy production of a kind of structure, cost of production are lower, can realize high low pressure point interflow.
The concrete technological scheme that the present invention takes is:
A kind of gear pump that can realize high low pressure point interflow, comprise first pump housing and second pump housing of coaxial setting, key point is, connected by the interflow pump housing between first pump housing and second pump housing, the interflow pump housing offers filler opening and oil outlet, first pump housing be provided with the oil inlet passage and oil discharge passage that are communicated with oil outlet with filler opening respectively in second pump housing, oil outlet inwall offers the oily passage of control, oil discharge passage is provided with one-way valve in oil outlet side near the second pump housing place, oil inlet passage is provided with and regulates passage to be communicated with between second pump housing the inner and the inner of oil discharge passage, control the lower end of oily passage and upper end respectively with oil outlet with regulate channel connection, regulate in passage and be provided with controlling device, controlling device regulates oil inlet passage and oil discharge passage closing and being communicated with at second pump housing.
Described controlling device comprises hydraulic control valve, control piston and slide block, hydraulic control valve be arranged at oil inlet passage with regulate passage connectivity part and with adjustment channel coaxial, the oily passage end of the inherent close control of passage is regulated to be provided with piston channel, the diameter of piston channel is greater than adjustment passage, control piston and piston channel are slidably matched, control piston is coaxially connected with slide block, the outer peripheral surface of slide block is provided with seal ring, slide block is slidably matched with regulating passage, slide block is fixedly connected with hydraulic control valve by connecting rod, and the diameter of connecting rod is less than adjustment passage.
Described hydraulic control valve comprises off-load valve body, off-load spool, pressure adjusting spring, the outer wall of off-load valve body is fixedly connected with second pump housing, one end of pressure adjusting spring is fixedly connected with off-load valve body, the other end of pressure adjusting spring is fixedly connected with one end of off-load spool, and the other end of off-load spool is with adjustment channel seal or be separated.
The end face of described off-load spool near connecting rod one end is conical surface.
Described off-load valve body is hollow structure, positioning block is provided with in cavity, positioning block and unloading valve body are formed and are slidably matched, the outer peripheral surface of positioning block is provided with seal ring, the inner opposite end of positioning block is fixedly connected with pressure adjusting spring, positioning block lateral ends is fixedly installed adjusting screw rod through the external end of unloading valve and locking nut, and the external port place of off-load valve body is provided with internal thread and coordinates with the outside thread of adjusting screw rod, and adjusting screw rod and locking nut form screw-threaded coupling and coordinate.
The invention has the beneficial effects as follows: this gear pump only need arrange a filler opening and an oil outlet, the oily passage of control is drawn at oil outlet, when gear pump output end pressure is low, because hydraulic control valve in controlling device can not be open, in this gear pump, first pump housing and second pump housing work simultaneously, and exported by oil outlet simultaneously, now gear pump can realize low pressure and mass flow output, gear pump can fast feed when low pressure, when gear pump output end pressure height, hydraulic control valve is open, in second pump housing, oil inlet passage is communicated with oil discharge passage, second pump housing off-load, pressure unloading is realized by regulating pressure adjusting spring, first pump housing is only had to export to oil outlet, now gear pump can realize the output of high-pressure low-flow, gear pump control accuracy when high pressure is higher, this gear pump is only provided with two mouth, manufacturing is more simple and easy compared to existing technology, manufacture cost reduces, and avoid in prior art need multiple control unit to carry out complex control causes easily makes mistakes, the not easily shortcoming of error correction.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Fig. 2 is the cross-sectional view of A-A in Fig. 1.
In accompanying drawing, 1 represents first pump housing, and 2 represent second pump housing, 3 represent filler opening, and 4 represent oil outlet, and 5 represent oil inlet passage, 6 represent oil discharge passage, the oily passage of 7 representative control, and 8 represent one-way valve, 9 representatives regulate passage, 10 represent control piston, and 11 represent connecting rod, and 12 represent slide block, 13 represent off-load valve body, 14 represent off-load spool, and 15 represent pressure adjusting spring, and 16 represent adjusting screw rod, 17 represent locking nut, 18 represent positioning block, the 19 representative interflow pump housings, and 20 represent rotatingshaft, 21 represent the first driving gear, and 22 represent the second driving gear.
Embodiment
This invention relates to a kind of gear pump that can realize high low pressure point interflow, comprise coaxial first pump housing 1 and second pump housing 2 arranged, connected by the interflow pump housing 19 between first pump housing 1 and second pump housing 2, the interflow pump housing 19 offers filler opening 3 and oil outlet 4, first pump housing 1 be provided with the oil inlet passage 5 and oil discharge passage 6 that are communicated with oil outlet 4 with filler opening 3 respectively in second pump housing 2, oil outlet 4 inwall offers the oily passage 7 of control, oil discharge passage 6 is provided with one-way valve 8 in oil outlet 4 side near the second pump housing 2 place, oil inlet passage 5 is provided with and regulates passage 9 to be communicated with between second pump housing 2 the inner and the inner of oil discharge passage 6, the lower end controlling oily passage 7 and upper end respectively with oil outlet 4 with regulate passage 9 and be communicated with, regulate in passage 9 and be provided with controlling device, controlling device regulates oil inlet passage 5 and oil discharge passage 6 closing and being communicated with at second pump housing 2.
Specific embodiment, as depicted in figs. 1 and 2, the controlling device in passage 9 is regulated to comprise hydraulic control valve, control piston 10 and slide block 12, hydraulic control valve is arranged at oil inlet passage 5 and regulates the connectivity part of passage 9 and coaxial with adjustment passage 9, oily passage 7 one end of the inherent close control of passage 9 is regulated to be provided with piston channel, the diameter of piston channel is greater than adjustment passage 9, control piston 10 and piston channel are slidably matched, control piston 10 is coaxially connected with slide block 12, the outer peripheral surface of slide block 12 is provided with seal ring, slide block 12 is slidably matched with regulating passage 9, slide block 12 is fixedly connected with hydraulic control valve by connecting rod 11, the diameter of connecting rod 11 is less than adjustment passage 9, hydraulic control valve comprises off-load valve body 13, off-load spool 14, pressure adjusting spring 15, the outer wall of off-load valve body 13 is fixedly connected with second pump housing 2, one end of pressure adjusting spring 15 is fixedly connected with off-load valve body 13, the other end of pressure adjusting spring 15 is fixedly connected with one end of off-load spool 14, the other end end face of off-load spool 14 is conical surface, seal by this conical surface with adjustment passage 9 or be separated, off-load valve body 13 is hollow structure, positioning block 18 is provided with in cavity, positioning block 18 and off-load valve body 13 are formed and are slidably matched, the outer peripheral surface of positioning block 18 is provided with seal ring, the inner opposite end of positioning block 18 is fixedly connected with pressure adjusting spring 15, positioning block 18 lateral ends is fixedly installed adjusting screw rod 16 through off-load valve body 13 outer end and locking nut 17, the external port place of off-load valve body 13 is provided with internal thread and coordinates with the outside thread of adjusting screw rod 16, adjusting screw rod 16 forms screw-threaded coupling with locking nut 17 and coordinates.
The present invention is in the specific implementation: the rotatingshaft 20 being driven this gear pump by motor, rotatingshaft 20 drives the first driving gear 21 of first pump housing 1 and the second driving gear 22 of second pump housing 2, first pump housing 1 and second pump housing 2 are by the engagement of driving gear and driven gear, the oil of filler opening 3 is transported to oil outlet 4, wherein the second pump housing 2 delivery pressure needs to be greater than arranging pressure and the oil discharge passage 6 of second pump housing 2 could being communicated with oil outlet 4 of one-way valve 8, when the output end pressure of gear pump does not reach the pressure of pressure adjusting spring 15 in hydraulic control valve, the pressure oil controlled in oily passage 7 can not push off-load spool 14 open, off-load spool 14 and adjustment passage 9 closing contact, first pump housing 1 and second pump housing 2 all carry out pressure oil output by oil outlet 4, now, gear pump can realize the output of low load large discharge, when the output end pressure of gear pump increases until when reaching the pressure of pressure adjusting spring 15 in hydraulic control valve gradually, control pressure oil in oily passage 7 by control piston 10 by extrapolated for off-load spool 14, passage 9 is regulated to be separated with off-load spool 14, in second pump housing 2, oil inlet passage 5 is communicated with by regulating passage 9 with oil discharge passage 6, the oil entered by filler opening 3 is entered by oil inlet passage 5 and regulates in passage 9, then enter in oil discharge passage 6 and wash one-way valve 8 open and arrive oil outlet 4 place, second pump housing 2 off-load, first pump housing 1 is only had to carry out pressure oil output by oil outlet 4, complete the unloading process of second pump housing 2, now, gear pump can realize the output of high loading small flow, pressure unloading is realized by regulating pressure adjusting spring 15, structure is simple, reasonable in design, easy production, cost of production is lower.
Two gear pumps are combined by the gear pump in the present invention, and the gear pump after associating only has two hydraulic fluid ports, compared to existing technology, manufacturing difficulty reduces, manufacture cost also decreases, and by the control oil passage that arranges and when regulating passage can realize large load low discharge export and side crops industry time two pumps interflow large discharge output; Fit dimension between adjustment adjusting screw rod and locking nut, make the pressure adjusting spring in controlling device can change the force value of the second pump housing off-load, thus critical pressure when making this gear pump realize large load small flow can adjust flexibly, increases the using scope of gear pump; Gear pump in the present invention is without the need to adding position limit switch and solenoid directional control valve, avoid that overall control element in prior art is more, pipeline and circuit more complicated and need electrical control could the complexity of practical function, gear pump structure in the present invention is simple, cost of production is lower, easy and simple to handle, not easily there is error in operation thus the defect of the realization of the function that has an impact, and comparatively fast can find fault place when equipment breaks down and revise in time.
Claims (5)
1. one kind can realize the gear pump at high low pressure point interflow, comprise first pump housing (1) and second pump housing (2) of coaxial setting, it is characterized in that: connected by the interflow pump housing (19) between first pump housing (1) and second pump housing (2), the interflow pump housing (19) offers filler opening (3) and oil outlet (4), first pump housing (1) be provided with the oil inlet passage (5) and oil discharge passage (6) that are communicated with oil outlet (4) with filler opening (3) respectively in second pump housing (2), oil outlet (4) inwall offers the oily passage of control (7), oil discharge passage (6) is provided with one-way valve (8) in oil outlet (4) side near second pump housing (2) place, oil inlet passage (5) is provided with and regulates passage (9) to be communicated with between second pump housing (2) the inner and the inner of oil discharge passage (6), the lower end controlling oily passage (7) and upper end respectively with oil outlet (4) with regulate passage (9) and be communicated with, regulate in passage (9) and be provided with controlling device, controlling device regulates oil inlet passage (5) and oil discharge passage (6) closing and being communicated with at second pump housing (2).
2. a kind of gear pump that can realize high low pressure point interflow according to claim 1, it is characterized in that: described controlling device comprises hydraulic control valve, control piston (10) and slide block (12), hydraulic control valve be arranged at oil inlet passage (5) with regulate passage (9) connectivity part and with adjustment passage (9) coaxial, inherent close control oily passage (7) one end of passage (9) is regulated to be provided with piston channel, the diameter of piston channel is greater than adjustment passage (9), control piston (10) and piston channel are slidably matched, control piston (10) is coaxially connected with slide block (12), the outer peripheral surface of slide block (12) is provided with seal ring, slide block (12) is slidably matched with regulating passage (9), slide block (12) is fixedly connected with hydraulic control valve by connecting rod (11), the diameter of connecting rod (11) is less than adjustment passage (9).
3. a kind of gear pump that can realize high low pressure point interflow according to claim 2, it is characterized in that: described hydraulic control valve comprises off-load valve body (13), off-load spool (14), pressure adjusting spring (15), the outer wall of off-load valve body (13) is fixedly connected with second pump housing (2), one end of pressure adjusting spring (15) is fixedly connected with off-load valve body (13), the other end of pressure adjusting spring (15) is fixedly connected with one end of off-load spool (14), the other end of off-load spool (14) seals with adjustment passage (9) or is separated.
4. a kind of gear pump that can realize high low pressure point interflow according to claim 3, is characterized in that: the end face of described off-load spool (14) near connecting rod (11) one end is conical surface.
5. a kind of gear pump that can realize high low pressure point interflow according to claim 3, it is characterized in that: described off-load valve body (13) is hollow structure, positioning block (18) is provided with in cavity, positioning block (18) and off-load valve body (13) are formed and are slidably matched, the outer peripheral surface of positioning block (18) is provided with seal ring, the inner opposite end of positioning block (18) is fixedly connected with pressure adjusting spring (15), positioning block (18) lateral ends is fixedly installed adjusting screw rod (16) through off-load valve body (13) outer end and locking nut (17), the external port place of off-load valve body (13) is provided with internal thread and coordinates with the outside thread of adjusting screw rod (16), adjusting screw rod (16) forms screw-threaded coupling with locking nut (17) and coordinates.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510340665.1A CN104929930B (en) | 2015-06-18 | 2015-06-18 | A kind of gear pump being capable of high-low pressure confluence |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510340665.1A CN104929930B (en) | 2015-06-18 | 2015-06-18 | A kind of gear pump being capable of high-low pressure confluence |
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| Publication Number | Publication Date |
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| CN104929930A true CN104929930A (en) | 2015-09-23 |
| CN104929930B CN104929930B (en) | 2017-03-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510340665.1A Active CN104929930B (en) | 2015-06-18 | 2015-06-18 | A kind of gear pump being capable of high-low pressure confluence |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107327689A (en) * | 2017-08-17 | 2017-11-07 | 湖南机油泵股份有限公司 | A kind of duplex lubricating oil pump of variable displacement |
| CN110017275A (en) * | 2019-04-12 | 2019-07-16 | 桐庐海普机电设备有限公司 | A kind of gear pump and its working method |
| CN110985212A (en) * | 2019-11-04 | 2020-04-10 | 南京航空航天大学 | Indirect hydraulic drive type fuel oil switch valve of pump control cylinder and control method thereof |
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| JPH06280756A (en) * | 1993-03-30 | 1994-10-04 | Toyoda Mach Works Ltd | Pump switching type variable displacement hydraulic pump device |
| EP0811765A2 (en) * | 1996-06-05 | 1997-12-10 | Bayerische Motoren Werke Aktiengesellschaft, Patentabteilung AJ-3 | Internal combustion engine with two-stage internal gear pump |
| CN2751160Y (en) * | 2004-12-31 | 2006-01-11 | 徐州科源液压有限公司 | Double flow rate and double pressure sequence gear pump |
| CN102155404A (en) * | 2011-04-28 | 2011-08-17 | 全兴精工集团有限公司 | Automobile twin-stage-type hydraulic power-assisted steering vane pump |
| CN203532246U (en) * | 2013-10-21 | 2014-04-09 | 无锡市德力流体科技有限公司 | High-low pressure duplicate gear pump |
| CN204704105U (en) * | 2015-06-18 | 2015-10-14 | 河北睿智辰诚液压机械科技有限公司 | A kind of gear pump that can realize high low pressure point interflow |
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2015
- 2015-06-18 CN CN201510340665.1A patent/CN104929930B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06280756A (en) * | 1993-03-30 | 1994-10-04 | Toyoda Mach Works Ltd | Pump switching type variable displacement hydraulic pump device |
| EP0811765A2 (en) * | 1996-06-05 | 1997-12-10 | Bayerische Motoren Werke Aktiengesellschaft, Patentabteilung AJ-3 | Internal combustion engine with two-stage internal gear pump |
| CN2751160Y (en) * | 2004-12-31 | 2006-01-11 | 徐州科源液压有限公司 | Double flow rate and double pressure sequence gear pump |
| CN102155404A (en) * | 2011-04-28 | 2011-08-17 | 全兴精工集团有限公司 | Automobile twin-stage-type hydraulic power-assisted steering vane pump |
| CN203532246U (en) * | 2013-10-21 | 2014-04-09 | 无锡市德力流体科技有限公司 | High-low pressure duplicate gear pump |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107327689A (en) * | 2017-08-17 | 2017-11-07 | 湖南机油泵股份有限公司 | A kind of duplex lubricating oil pump of variable displacement |
| CN110017275A (en) * | 2019-04-12 | 2019-07-16 | 桐庐海普机电设备有限公司 | A kind of gear pump and its working method |
| CN110017275B (en) * | 2019-04-12 | 2024-05-24 | 桐庐海普机电设备有限公司 | Gear pump and working method thereof |
| CN110985212A (en) * | 2019-11-04 | 2020-04-10 | 南京航空航天大学 | Indirect hydraulic drive type fuel oil switch valve of pump control cylinder and control method thereof |
| CN110985212B (en) * | 2019-11-04 | 2022-04-22 | 南京航空航天大学 | Indirect hydraulic drive type fuel oil switch valve of pump control cylinder and control method thereof |
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| Publication number | Publication date |
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| CN104929930B (en) | 2017-03-01 |
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