CN103670900A - Variable displacement hydraulic motor using asymmetric inner curve - Google Patents
Variable displacement hydraulic motor using asymmetric inner curve Download PDFInfo
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- CN103670900A CN103670900A CN201310653768.4A CN201310653768A CN103670900A CN 103670900 A CN103670900 A CN 103670900A CN 201310653768 A CN201310653768 A CN 201310653768A CN 103670900 A CN103670900 A CN 103670900A
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Abstract
The invention relates to a variable displacement hydraulic motor using an asymmetric inner curve, the variable displacement hydraulic motor includes a stator, a rotor and plunger pistons. The plurality plunger pistons are evenly arranged on the outer circumference of the rotor and around the central axis, rollers are arranged on the outside end of the plunger pistons, the inside wall of the stator is a wave surface, the wave surface is formed by interval alternation and end-to-end connection of stroke curve surfaces I and stroke curve surfaces II which are inconsistent in concave depth, the number of the stroke curve surfaces I and the stroke curve surfaces II is same, the stroke curve surfaces I and the stroke curve surfaces II are divided into plunger piston work areas I and plunger piston work areas II by center lines thereof, and the positions of the plunger piston work areas I and the plunger piston work areas II are corresponded to the positions of oil outlet holes with the same number. The variable displacement hydraulic motor is simple in structure, the asymmetric stator with unequal concave depths is used, and the hydraulic motor is flexibly controllable in displacement during displacement variation work, convenient in displacement conversion, low in manufacturing cost, and suitable for different types of hydraulic motors.
Description
Technical field
The present invention relates to hydraulic motor with inner curved piston field, particularly relate to a kind of change displacement hydraulic motor that adopts asymmetric inner curve.
Background technique
Inner curve radial plunger type hydraulic pump/motor is a kind of low speed high torque hydraulic motor that the industries such as engineering machinery, mining equiment are often selected.Due to hydraulic motor plunger in each turns back and forth work done repeatedly, therefore the swept volume that individual pen rotates is larger, plunger quantity is more in addition, can effectively disperse the work stress of each plunger, has ability and the high pressure resistant property of stronger withstand shock.
The inner side surface of the stator of existing inner curve radial plunger type hydraulic pump/motor is all corrugated curved surface, this curved surface is joined end to end and is formed by many independent inner concave arc surfaces, the patent of invention that the denomination of invention that is 201010197277.X as China Patent No. is " Innercurve multiple-action radial plunger type hydraulic motor ", the inner side surface of the stator of wherein using is just that 8 independent inner concave arc surfaces that communicate form, this structure is when delivery is worked, and its discharge capacity is constant, when becoming discharge capacity work, when the adjustment by oil distributing shaft makes in rotor that oil-feed plunger quantity only has delivery work 1/2 of oil-feed plunger quantity, because the degree of depth of inner concave arc surface is unified, therefore become the value of discharge capacity and can only be delivery half, cannot change the value that becomes discharge capacity, will the whole structure that changes motor if must change the displacement value that becomes after discharge capacity, as change the structure of oil distributing shaft and rotor, make oil distributing shaft can input the oil mass of other ratios or change oil-feed plunger quantity, do like this complex structure, cost is high, be unfavorable for changing change displacement value according to actual conditions.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of change displacement hydraulic motor that adopts asymmetric inner curve, simple in structure, the stator that adopts the asymmetric indent degree of depth not wait, discharge capacity convenience, low cost of manufacture can be controlled, be changed to the discharge capacity of oil hydraulic motor when becoming discharge capacity work flexibly, is applicable to the oil hydraulic motor of different model.
The technical solution adopted for the present invention to solve the technical problems is: a kind of change displacement hydraulic motor that adopts asymmetric inner curve is provided, comprise stator, rotor and plunger, the inner concentric of described stator is furnished with rotor, on this rotor, along excircle, around medial axis, several plungers have been evenly arranged, the outboard end of this plunger is provided with the roller of being close to stator inner side surface, on the rotor of the medial extremity of described plunger, be furnished with the filler opening communicating with the oil distributing shaft of rotor lower end, the madial wall of described stator is wave curved surface, this wave curved surface replaces end-to-end by the indent degree of depth inconsistent stroke curved surface I and stroke curved surface II interval and forms, described stroke curved surface I is identical with the quantity of stroke curved surface II, described stroke curved surface I and stroke curved surface II are divided into plunger working area I and plunger working area II by its center line, described plunger working area I and plunger working area II with on oil distributing shaft etc. the position of oil outlet of quantity corresponding.
When described rotor clockwise rotates, plunger working area I is positioned at the left side of center line, and plunger working area II is positioned at the right side of center line, when described rotor rotates counterclockwise, and the location swap of plunger working area I and plunger working area II.
Described rotor clockwise rotates, the indent degree of depth of stroke curved surface I is while being greater than the indent degree of depth of stroke curved surface II, and the change discharge capacity of this oil hydraulic motor is less than 1/2 of its delivery.
Described rotor clockwise rotates, the indent degree of depth of stroke curved surface I is while being less than the indent degree of depth of stroke curved surface II, and the change discharge capacity of this oil hydraulic motor is greater than 1/2 of its delivery.
The sum of described stroke curved surface I and stroke curved surface II is at least 4.
The quantity of described plunger is greater than or less than the sum of stroke curved surface I and stroke curved surface II.
Described roller is barrel shaped roller, and the shape of the inner side wave curved surface of described stator and the profile of roller match.
The upper-end surface of described stator has been evenly arranged some groups of installation screws, and every group of installation screw is comprised of two installation screws that are arranged side by side.
When oil hydraulic motor is when delivery is worked, each oil outlet of oil distributing shaft is all fuel-displaced, make each filler opening all have entering of hydraulic oil, hydraulic oil promotes plunger outward side and ejects, owing to acting between roller and the inner curve of stator, produce tangential force, therefore along with the rotor that ejects of plunger starts to rotate.
Now, the ⅠWei Gao hydraulic district, plunger working area of stroke curved surface I and stroke curved surface II, plunger in this regional work is all subject to high pressure, the ⅡWei operating on low voltage district, plunger working area of stroke curved surface I and stroke curved surface II, plunger in this regional work is all subject to low-pressure, the rotation of rotor is mainly to interact by roller and plunger working area I, and the tangential component producing is realized rotation, and during delivery work, discharge capacity is invariable.
When oil hydraulic motor is when becoming discharge capacity work, because oil distributing shaft oil inlet hole quantity only has half of delivery when work filler opening quantity, left in half hydraulic fluid port in fuel-displaced state, oil-feed position on oil distributing shaft can not moved along with the rotation of rotor, now the oil-feed position on oil distributing shaft is corresponding with the plunger working area I in stroke curved surface II, ⅠJiu Weigao hydraulic district, plunger working area in stroke curved surface II like this, plunger in this regional work is all subject to high pressure, and plunger working area I and plunger working area II in stroke curved surface I is operating on low voltage district, plunger in this regional work is all subject to low-pressure.
The plunger quantity that is operated in high pressure district due to hydraulic motor with inner curved piston reduces, and oil hydraulic motor discharge capacity reduces, if stroke curved surface I is identical with the indent degree of depth of stroke curved surface II, after variable discharge capacity be delivery half; Because the indent degree of depth of stroke curved surface I and stroke curved surface II is not identical, therefore after variable, the ratio between discharge capacity and delivery is not constant, when the indent degree of depth of stroke curved surface I is greater than the indent degree of depth of stroke curved surface II, the change discharge capacity of this oil hydraulic motor is less than 1/2 of its delivery, when the indent degree of depth of stroke curved surface I is less than the indent degree of depth of stroke curved surface II, the change discharge capacity of this oil hydraulic motor is greater than 1/2 of its delivery.
The formula for displacement calculation that is applied to delivery state of the present invention is:
discharge capacity while becoming discharge capacity work
the diameter that wherein D is plunger, Y is the row of plunger hole, Z is the quantity of plunger, H is the indent depth-averaged value of stroke curved surface, h is the indent depth value of asymmetric stroke while becoming discharge capacity, X is the effect number of times of oil pressure under delivery state, and χ is for becoming the effect number of times of the oil pressure under displacement condition, generally the value of χ be X half.
If need oil hydraulic motor to realize different change discharge capacities, only need to change different stators just passable, do not need more exchanging rotor and oil distributing shaft.
beneficial effect
The present invention relates to a kind of change displacement hydraulic motor that adopts asymmetric inner curve, the negative camber stator of original curved surface symmetry is replaced by the negative camber stator that the asymmetrical indent degree of depth does not wait, overcome in the oil hydraulic motor of traditional inner curve and can only use the technology prejudice of the stator that the negative camber indent degree of depth is identical and obtain beyond thought technique effect, make the discharge capacity of oil hydraulic motor when becoming discharge capacity work by the not even depth of stator size stroke, control to change flexibly, and the stator that only need to change in use different negative cambers just can reach the change discharge capacity of different ratios, simple to operate, low cost of manufacture, it is convenient to install, can modularization produce, be applicable to the hydraulic motor with inner curved piston of different size and model.
Accompanying drawing explanation
Fig. 1 is that master of the present invention is depending on partly cuing open schematic diagram;
Fig. 2 is the structural drawing of stator of the present invention;
Fig. 3 is that master of the present invention is depending on partly cuing open structural drawing.
Embodiment
Below in conjunction with specific embodiment, further set forth the present invention.Should be understood that these embodiments are only not used in and limit the scope of the invention for the present invention is described.In addition should be understood that those skilled in the art can make various changes or modifications the present invention after having read the content of the present invention's instruction, these equivalent form of values fall within the application's appended claims limited range equally.
As Figure 1-3, embodiments of the present invention relate to a kind of change displacement hydraulic motor that adopts asymmetric inner curve, comprise stator 2, rotor 1 and plunger 4, the inner concentric of described stator 2 is furnished with rotor 1, on this rotor 1, along excircle, around medial axis, several plungers 4 have been evenly arranged, the outboard end of this plunger 4 is provided with the roller 3 of being close to stator 2 inner side surfaces, on the rotor 1 of the medial extremity of described plunger 4, be furnished with the filler opening 5 communicating with the oil distributing shaft 9 of rotor 1 lower end, the madial wall of described stator 2 is wave curved surface, this wave curved surface replaces end-to-end by the inconsistent stroke curved surface of indent degree of depth I 7 and stroke curved surface II 6 intervals and forms, described stroke curved surface I 7 is identical with the quantity of stroke curved surface II 6, described stroke curved surface I 7 and stroke curved surface II 6 are divided into plunger working area I 21 and plunger working area II 22 by its center line, described plunger working area I 21 and plunger working area II 22 with on oil distributing shaft 9 etc. the position of oil outlet of quantity corresponding.
When described rotor 1 clockwise rotates, plunger working area I 21 is positioned at the left side of center line, and plunger working area II 22 is positioned at the right side of center line, when described rotor 1 rotates counterclockwise, and the location swap of plunger working area I 21 and plunger working area II 22.
Described rotor 1 clockwise rotates, the indent degree of depth of stroke curved surface I 7 is while being greater than the indent degree of depth of stroke curved surface II 6, and the change discharge capacity of this oil hydraulic motor is less than 1/2 of its delivery.
Described rotor 1 clockwise rotates, the indent degree of depth of stroke curved surface I 7 is while being less than the indent degree of depth of stroke curved surface II 6, and the change discharge capacity of this oil hydraulic motor is greater than 1/2 of its delivery.
Described roller 3 is barrel shaped roller, and the shape of inner side wave curved surface and the profile of roller 3 of described stator 2 match.
The upper-end surface of described stator 2 has been evenly arranged some groups of installation screws 8, and every group of installation screw 8 is comprised of two installation screws that are arranged side by side 8.
When oil hydraulic motor is when delivery is worked, each oil outlet of oil distributing shaft 9 is all fuel-displaced, make each filler opening all have entering of hydraulic oil, hydraulic oil promotes plunger 4 and ejects laterally, owing to acting between roller 3 and the inner curve of stator 2, produce tangential force, therefore along with the rotor 1 that ejects of plunger 4 starts to rotate.
Now, the Ⅰ21Wei Gao hydraulic district, plunger working area of stroke curved surface I 7 and stroke curved surface II 6, plunger 4 in this regional work is all subject to high pressure, the Ⅱ22Wei operating on low voltage district, plunger working area of stroke curved surface I 7 and stroke curved surface II 6, plunger 4 in this regional work is all subject to low-pressure, the rotation of rotor 1 is mainly that the tangential component producing by roller 3 and plunger working area I 21 is realized rotation, and during delivery work, discharge capacity is invariable.
When oil hydraulic motor is when becoming discharge capacity work, because oil distributing shaft 9 oil inlet hole quantity only have half of delivery when work filler opening quantity, left in half hydraulic fluid port in fuel-displaced state, fuel-displaced position on oil distributing shaft 9 can not moved along with the rotation of rotor 1, now the oil-feed position on oil distributing shaft 9 is corresponding with the plunger working area I 21 in stroke curved surface II 6, I 21Jiu Weigao hydraulic district, plunger working area in stroke curved surface II 6 like this, plunger 4 in this regional work is all subject to high pressure, and plunger working area I 21 and plunger working area II 22 in stroke curved surface I 7 is operating on low voltage district, plunger 4 in this regional work is all subject to low-pressure.
The plunger that is operated in high pressure district due to hydraulic motor with inner curved piston reduces, and oil hydraulic motor discharge capacity reduces, if stroke curved surface I 7 is identical with the indent degree of depth of stroke curved surface II 6, after variable discharge capacity be delivery half; Because the indent degree of depth of stroke curved surface I 7 and stroke curved surface II 6 is not identical, therefore after variable, the ratio between discharge capacity and delivery is not constant, when the indent degree of depth of stroke curved surface I 7 is greater than the indent degree of depth of stroke curved surface II 6, the change discharge capacity of this oil hydraulic motor is less than 1/2 of its delivery, as the situation of the discharge capacity code name A/B/C in table 1; When the indent degree of depth of stroke curved surface I 7 is less than the indent degree of depth of stroke curved surface II 6, the change discharge capacity of this oil hydraulic motor is greater than 1/2 of its delivery, as the situation of the discharge capacity code name D in table 1.
The formula for displacement calculation that is applied to delivery state of the present invention is:
discharge capacity while becoming discharge capacity work
the diameter that wherein D is plunger, Y is the row of plunger hole, Z is the quantity of plunger, H is the indent mean depth value of stroke curved surface, h is the indent depth value of asymmetric stroke while becoming discharge capacity, X is the effect number of times of oil pressure under delivery state, and χ is for becoming the effect number of times of the oil pressure under displacement condition, generally the value of χ be X half.
If need oil hydraulic motor to realize different change discharge capacities, only need to change different stators just passable, do not need more exchanging rotor and oil distributing shaft.
Apply above-mentioned formula, the madial wall of getting stator track has the oil hydraulic motor of 6 inner sunken faces, wherein stroke curved surface I 7 and stroke curved surface II 6 are respectively three, the quantity of plunger is 8, according to the stroke curved surface I 7 of the different indent degree of depth and stroke curved surface II 6, can obtain different change displacement value, list following corresponding example form:
Table 1
If need oil hydraulic motor to realize different change discharge capacities, only need to change different stators just passable, do not need more exchanging rotor and oil distributing shaft, simple and convenient, there is promotional value very widely.
Claims (8)
1. a change displacement hydraulic motor that adopts asymmetric inner curve, comprise stator (2), rotor (1) and plunger (4), the inner concentric of described stator (2) is furnished with rotor (1), this rotor (1) is upper has been evenly arranged several plungers (4) along excircle around medial axis, the outboard end of this plunger (4) is provided with the roller (3) of being close to stator (2) inner side surface, on the rotor (1) of the medial extremity of described plunger (4), be furnished with the oil inlet and outlet (5) communicating with the oil distributing shaft (9) of rotor (1) lower end, it is characterized in that, the madial wall of described stator (2) is wave curved surface, this wave curved surface replaces end-to-end by the inconsistent stroke curved surface of indent degree of depth I (7) and stroke curved surface II (6) interval and forms, described stroke curved surface I (7) is identical with the quantity of stroke curved surface II (6), described stroke curved surface I (7) and stroke curved surface II (6) are divided into plunger working area I (21) and plunger working area II (22) by its center line, described plunger working area I (21) and plunger working area II (22) with on oil distributing shaft (9) etc. the turnover oil-hole location of quantity corresponding.
2. a kind of change displacement hydraulic motor that adopts asymmetric inner curve according to claim 1, it is characterized in that: when described rotor (1) clockwise rotates, plunger working area I (21) is positioned at the left side of center line, plunger working area II (22) is positioned at the right side of center line, when described rotor (1) rotates counterclockwise, the location swap of plunger working area I (21) and plunger working area II (22).
3. a kind of change displacement hydraulic motor that adopts asymmetric inner curve according to claim 1 and 2, it is characterized in that: described rotor (1) clockwise rotates, the indent degree of depth of stroke curved surface I (7) is while being greater than the indent degree of depth of stroke curved surface II (6), and the change discharge capacity of this oil hydraulic motor is less than 1/2 of its delivery.
4. a kind of change displacement hydraulic motor that adopts asymmetric inner curve according to claim 1 and 2, it is characterized in that: described rotor (1) clockwise rotates, the indent degree of depth of stroke curved surface I (7) is while being less than the indent degree of depth of stroke curved surface II (6), and the change discharge capacity of this oil hydraulic motor is greater than 1/2 of its delivery.
5. a kind of change displacement hydraulic motor that adopts asymmetric inner curve according to claim 1, is characterized in that: described stroke curved surface I (7) and the quantity sum of stroke curved surface II (6) are at least 4.
6. a kind of change displacement hydraulic motor that adopts asymmetric inner curve according to claim 1, is characterized in that: the quantity of described plunger (4) is greater than or less than the sum of stroke curved surface I (7) and stroke curved surface II (6).
7. a kind of change displacement hydraulic motor that adopts asymmetric inner curve according to claim 1, is characterized in that: described roller (3) is barrel shaped roller, and the shape of the inner side wave curved surface of described stator (2) and the profile of roller (3) match.
8. a kind of change displacement hydraulic motor that adopts asymmetric inner curve according to claim 1, it is characterized in that: the upper-end surface of described stator (2) has been evenly arranged some groups of installation screws (8), every group of installation screw (8) is comprised of two installation screws that are arranged side by side (8).
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| CN201310653768.4A CN103670900B (en) | 2013-12-06 | 2013-12-06 | A kind of change displacement hydraulic motor using asymmetric inner curve |
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| CN103670900B CN103670900B (en) | 2016-08-24 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107575378A (en) * | 2017-08-31 | 2018-01-12 | 常熟市海虞镇志宏五金厂 | Adjustable inner curve hydraulic pump or motor |
| CN112177843A (en) * | 2020-10-09 | 2021-01-05 | 东莞海特帕沃液压科技有限公司 | Inner curve radial plunger hydraulic motor |
| CN116275295A (en) * | 2023-02-22 | 2023-06-23 | 宁波大学 | Machining method for guide rail curved surface of hydraulic motor stator |
Citations (6)
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| US3672797A (en) * | 1969-12-10 | 1972-06-27 | Gerlach Brown Inc | Fluid power converter |
| JPS56141269A (en) * | 1980-03-31 | 1981-11-04 | Mitsuo Enomoto | Winding tool for hose |
| GB2332929A (en) * | 1997-08-21 | 1999-07-07 | Lucas Ind Plc | A cam follower and plunger arrangement for a rotary fuel pump |
| WO2000028218A1 (en) * | 1998-11-05 | 2000-05-18 | Coeuret Bernard Rene Charles | Rotary hydraulic machine |
| CN2773313Y (en) * | 2005-03-04 | 2006-04-19 | 谢祖焯 | Rotor style liquid mechanical device |
| CN203685465U (en) * | 2013-12-06 | 2014-07-02 | 宁波斯达弗液压传动有限公司 | Variable displacement hydraulic motor adopting asymmetric multi-stroke curve |
-
2013
- 2013-12-06 CN CN201310653768.4A patent/CN103670900B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3672797A (en) * | 1969-12-10 | 1972-06-27 | Gerlach Brown Inc | Fluid power converter |
| JPS56141269A (en) * | 1980-03-31 | 1981-11-04 | Mitsuo Enomoto | Winding tool for hose |
| GB2332929A (en) * | 1997-08-21 | 1999-07-07 | Lucas Ind Plc | A cam follower and plunger arrangement for a rotary fuel pump |
| WO2000028218A1 (en) * | 1998-11-05 | 2000-05-18 | Coeuret Bernard Rene Charles | Rotary hydraulic machine |
| CN2773313Y (en) * | 2005-03-04 | 2006-04-19 | 谢祖焯 | Rotor style liquid mechanical device |
| CN203685465U (en) * | 2013-12-06 | 2014-07-02 | 宁波斯达弗液压传动有限公司 | Variable displacement hydraulic motor adopting asymmetric multi-stroke curve |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107575378A (en) * | 2017-08-31 | 2018-01-12 | 常熟市海虞镇志宏五金厂 | Adjustable inner curve hydraulic pump or motor |
| CN107575378B (en) * | 2017-08-31 | 2024-02-09 | 常熟市海虞镇志宏五金厂 | Adjustable inner curve hydraulic pump or motor |
| CN112177843A (en) * | 2020-10-09 | 2021-01-05 | 东莞海特帕沃液压科技有限公司 | Inner curve radial plunger hydraulic motor |
| CN116275295A (en) * | 2023-02-22 | 2023-06-23 | 宁波大学 | Machining method for guide rail curved surface of hydraulic motor stator |
| CN116275295B (en) * | 2023-02-22 | 2024-05-17 | 宁波大学 | Machining method for guide rail curved surface of hydraulic motor stator |
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