CN103670896A - Vane type oil motor - Google Patents
Vane type oil motor Download PDFInfo
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- CN103670896A CN103670896A CN201310688751.2A CN201310688751A CN103670896A CN 103670896 A CN103670896 A CN 103670896A CN 201310688751 A CN201310688751 A CN 201310688751A CN 103670896 A CN103670896 A CN 103670896A
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Abstract
The invention discloses a vane type oil motor which comprises a casing, a rotor, vanes, seal strips and cushion blocks, wherein the rotor is arranged in the center; the casing is arranged outside; the vanes are arranged in hollow circular rings at the opposite angles of the casing and also arranged in the grooves of the rotor, and form angles together with the rotor; one plane of each vane is tangent to the circular-truncated-cone side surface of the rotor; the seal strips are arranged between the rotor and the vanes, one side of the plane of each seal strip is fitted with the rotor, and one side of the circular-truncated-cone surface of each seal strip is fitted with the circular truncated cone surface E1 of the corresponding vane; the cushion blocks are arranged in the hollow circular rings at the opposite angles of the casing, and gaps formed by the casing, the vanes, the rotor and the seal strips are just filled up with the cushion blocks. All sealed parts adopt face seal; the vane type oil motor is small in size, large in torque, high in efficiency and specific power, compact in structure, easier to process, lower in cost and long in service life.
Description
Technical field
The present invention relates to oil hydraulic motor, relate in particular to a kind of new blade oil motor.
Background technique
Existing vane motor structure is a rotor eccentricity and is placed in cylinder body, blade radial or be placed in rotor with rotor radius is angled, during work, blade throws away under the effect of spring or oil pressure, form Seal cage with cylinder body, this form vane motor is owing to being by the sealing of Line of contact between blade and cylinder body, therefore sealability is poor, output torque is lower, while adding rotation, between blade and rotor and cylinder body, produce very large friction, cause vane motor overall wear fast, life-span is short, and efficiency is low.In addition, during rotation, in order to guarantee that blade can safety pass in and out in rotor, rotor must have suitable diameter, like this certainly will volume large, specific power be low, although there is Double-blade type oil hydraulic motor, but owing to only having two blades, output torque pulsation is larger, and it is large that output torque is also owed.
Summary of the invention
The object of this invention is to provide that a kind of can to realize specific power large, output torque is large, and output torque pulsation is again little, and all sealings place are again face sealing, and nonabradable new blade oil motor.
In order to achieve the above object, the technical solution used in the present invention is as follows: a kind of new blade oil motor, comprise housing, rotor, blade, Stamping Steel Ribbon and cushion block, rotor is positioned at center, housing is positioned at outside, blade is placed in the hollow ring at housing diagonal angle, also be positioned at the groove of rotor simultaneously, and with rotor at an angle, plane of blade and the frustum cone side of rotor are tangent, Stamping Steel Ribbon is between rotor and blade, its plane one side and rotor laminating, round table surface one side is fitted with the round table surface E1 of blade, cushion block is positioned at the hollow ring at housing diagonal angle, just in time fill up by housing, blade, the vacancy that rotor and Stamping Steel Ribbon form.
In above-mentioned a kind of new blade oil motor, described blade is quadrant shape, and total identical four, wherein a slice blade is enclosed and formed by two plane A1, B1 and cylinder C1, sphere D1 and two round table surface E1, J1; Wherein, C1Shi center is the cylinder that centre of sphere O1, radius are identical with the radius of the cylinder E3 of the hollow ring of housing, D1 is that the centre of sphere is the sphere that O1 radius is identical with rotor billiard table C2 radius, E1 and J1 are round table surface, the diameter of its upper bottom surface and bottom surface is respectively straight line R1S1 and straight line M1N1, and M1R1 and N1S1 are its side buses; Two plane A1 are parallel with B1; The thickness that the distance of two parallel plane A1 and B1 is blade, vane thickness equates with the hollow ring width of housing;
Described Stamping Steel Ribbon has identical eight, wherein an E1 side is round table surface, the diameter of its upper bottom surface and bottom surface is respectively straight line R1S1 and P1Q1, P1R1 and N1S1 are its side buses, K1 side is plane, cross axis and this plane parallel of centre of sphere O1, its perpendicular distance is half of four-bladed vane thickness of slab of rotor quadrature, G1 is that the centre of sphere is the sphere that O1 radius equates with rotor center billiard table C2 radius, F1 is that the centre of sphere is the sphere that O1 radius equates with housing sphere F3 radius, two faces of H1 and I1 are parallel planes, and the width of Stamping Steel Ribbon equates with vane thickness; Blade and Stamping Steel Ribbon are axisymmetric;
It in the middle of described rotor, is the parallel dolioform billiard table that cuts out two spherical crowns in two, in the middle of billiard table, as symmetry, insert the four-bladed vane of a quadrature, cydariform billiard table two is two identical hollow round tables, A2 is parallel disk with B2, R2 is parallel circle with S2, C2 and D2 are that the centre of sphere is the sphere of O2, I2 and J2 are orthogonal two planes, a blade and two Stamping Steel Ribbons are vertically placed in the groove between I2 and J2, just in time completely closely sealed, E2 is that the centre of sphere is the sphere that O2 radius is identical with housing sphere F3 radius with F2, G2 and H2 are two identical hollow round table part sides, one upper and lower two ends of side round platform were respectively disk A2 and circle R2, upper and lower two ends of opposite side round platform are respectively disk B2 and circle S2, the length of straigh line of K2M2 is the width of rotor, two frustum cone side G2 and H2 and corresponding housing hollow ring parallel plane C3 and D3 fit, whole rotor is not only about billiard table center O 2 symmetries, also be axisymmetric,
Described housing is the parallel dolioform sphere that cuts out two spherical crowns in two, thickness equates with the width K2M2 of rotor, A3 is the parallel disk that two radiuses equate with B3, sphere F3 be take O3 as the centre of sphere, radius equates with the radius of rotor left and right outside E2 and F2 sphere, the diagonal angle of housing sphere is a hollow ring, annulus width equates with vane thickness, two side C3 of hollow ring are parallel circular planes with D3, E3 is that central shaft is by the cylinder of O3, be positioned on the diagonal of housing, its external diameter equates with the external diameter of blade cylinder C1, and be greater than the external diameter of housing sphere F3, the C3 that annulus is parallel and D3 two planes fit with corresponding rotor two hollow round table side G2 and H2, whole housing is about billiard table center O 3 symmetries,
Described cushion block is one section of annulus, have identical four, wherein an outside A4 is the cylinder that radius equates with housing diagonal angle annulus E3 external diameter, inner side B4 is the sphere that radius equates with housing sphere F3 radius, its upper and lower thickness equates with the four-bladed vane width K2M2 of rotor quadrature, and two waist C4 and D4 are round table surface, and the diameter of this round table surface upper bottom surface and bottom surface is respectively straight line P1Q1 and M1N1, M1P1 is its side bus, and cushion block is shaped as axisymmetric.
The advantage that the present invention has is:
1) all sealings place are face sealing;
2) volume is little, and moment of torsion is large, and efficiency is high;
3) specific power is large;
4) compact structure, processing is relatively easy;
5) cost is lower, and the life-span is long.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the invention will be further described.
Fig. 1 is blade of the present invention and Stamping Steel Ribbon shape schematic diagram;
Fig. 2 be Fig. 1 S to T to schematic diagram;
Fig. 3 is rotor shapes schematic diagram of the present invention;
Fig. 4 is the W-W generalized section of Fig. 3;
Fig. 5 is the plan view of housing of the present invention;
Fig. 6 is the plan view of housing of the present invention;
Fig. 7 is the M-M generalized section of Fig. 6;
Fig. 8 is overall structure schematic diagram of the present invention;
Fig. 9 is that the K of Fig. 8 is to schematic diagram;
Figure 10 is the N-N generalized section of Fig. 8;
Figure 11 is running principle schematic diagram of the present invention;
Figure 12 is the U-U generalized section of Fig. 8;
Figure 13 is working procedure principle schematic of the present invention;
Figure 14 is the V-V generalized section of Figure 11;
Figure 15 is working procedure principle schematic of the present invention;
In figure: 1. housing, 2. rotor, 3. blade, 4. Stamping Steel Ribbon, 5. cushion block.
Embodiment
Structure of the present invention as shown in figure 11, rotor 2 is positioned at center, housing 1 is positioned at outside, blade 3 is placed in the hollow ring (guiding groove) at housing 1 diagonal angle, also be positioned at the groove of rotor 2 simultaneously, and with rotor 2 at an angle, plane of blade 3 and the frustum cone side of rotor 2 are tangent, Stamping Steel Ribbon 4 is between rotor 2 and blade 3, and its plane one side and rotor 2 are fitted, and round table surface one side is fitted with the round table surface E1 of blade 3, cushion block 5 is positioned at the hollow ring at housing 1 diagonal angle, just in time fill up by housing 1 blade 3, the vacancy that rotor 2 and Stamping Steel Ribbon 4 form.
Fig. 1 and the shape that Figure 2 shows that blade 3 of the present invention and Stamping Steel Ribbon 4.Blade 3 is quadrant shape or approximate quadrant shape, and total identical four, wherein a slice blade 3 is enclosed and formed by two plane A1, B1 and cylinder C1, sphere D1 and two round table surface E1, J1; Wherein, C1Shi center is the cylinder that centre of sphere O1, radius are identical with the radius of the cylinder E3 of the hollow ring of housing 1, D1 is that the centre of sphere is the sphere that O1 radius is identical with Fig. 4 rotor 2 billiard table C2 radiuses, E1 and J1 are round table surface, the diameter of its upper bottom surface and bottom surface is respectively straight line R1S1 and straight line M1N1, and M1R1 and N1S1 are its side buses; Two plane A1 are parallel with B1; The distance of two parallel plane A1 and B1 is the thickness of blade 3, and blade 3 thickness equate with the hollow ring width of Fig. 6 housing 1.
Stamping Steel Ribbon 4 has identical eight, wherein an E1 side is round table surface, the diameter of its upper bottom surface and bottom surface is respectively straight line R1S1 and P1Q1, P1R1 and N1S1 are its side buses, K1 side is plane, cross the axis (as shown in Figure 1) and this plane parallel of centre of sphere O1, its perpendicular distance is half of four-bladed vane thickness of slab of Fig. 4 rotor 2 quadratures, G1 is that the centre of sphere is the sphere that O1 radius equates with Fig. 4 rotor 2 center billiard table C2 radiuses, F1 is that the centre of sphere is the sphere that O1 radius equates with Fig. 6 housing 1 sphere F3 radius, two faces of H1 and I1 are parallel planes, the width of Stamping Steel Ribbon 4 (being the distance of plane H1 and I1) equates with blade 3 thickness, blade 3 and Stamping Steel Ribbon 4 are axisymmetric.
Fig. 3 and the shape that Figure 4 shows that rotor 2 of the present invention.It in the middle of rotor 2, is the parallel dolioform billiard table that cuts out two spherical crowns in two, in the middle of billiard table, as symmetry, insert the four-bladed vane of a quadrature, cydariform billiard table two is two identical hollow round tables, A2 is parallel disk with B2, R2 is parallel circle with S2, C2 and D2 are that the centre of sphere is the sphere of O2, I2 and J2 are orthogonal two planes, by the whole figure of Fig. 1, a blade 3 and two Stamping Steel Ribbons 4 are vertically placed in the groove between I2 and J2, just in time completely closely sealed, E2 is that the centre of sphere is the sphere that O2 radius is identical with housing 1 sphere F3 radius with F2, G2 and H2 are two identical hollow round table part sides, one upper and lower two ends of side round platform were respectively disk A2 and circle R2, upper and lower two ends of opposite side round platform are respectively disk B2 and circle S2, the length of straigh line of K2M2 is the width of rotor 2, the spatial position of two frustum cone side G2 and H2 is to determine as follows: after guaranteeing to assemble, two frustum cone side G2 and H2 and corresponding housing 1 hollow ring parallel plane C3 and D3 fit, whole rotor 2 is not only about billiard table center O 2 symmetries, also be axisymmetric.
Fig. 5, Fig. 6 and Figure 7 shows that the shape of housing 1 of the present invention.Housing 1 is the parallel dolioform sphere that cuts out two spherical crowns in two, thickness equates with the width K2M2 of rotor 2, A3 is the parallel disk that two radiuses equate with B3, sphere F3 be take O3 as the centre of sphere, radius equates with the radius of E2 outside rotor 2 left and right and F2 sphere, the diagonal angle of housing 1 sphere is a hollow ring, annulus width equates with blade 3 thickness, two side C3 of hollow ring are parallel circular planes with D3, E3 is that central shaft is by the cylinder of O3, be positioned on the diagonal of housing 1, its external diameter equates with the external diameter of blade 3 cylinder C1, and be greater than the external diameter of housing 1 sphere F3, the spatial position of the C3 that annulus is parallel and D3 two planes is to determine as follows: guarantee to assemble rear C3 and D3 two planes and fit with corresponding 2 liang of hollow round table side G2 of rotor and H2, the sphere of K3G3H3 is oil-feed face, the position of G3H3 is the dull and stereotyped position by Q4 side plane of the rotor between chamber Q3 and Q4 2 when rotor 2 forwards position shown in Figure 13 to, the sphere of L3I3J3 is oil extraction face, the position of I3J3 is the dull and stereotyped position by Q5 side plane of the rotor between chamber Q4 and Q5 2 when rotor 2 forwards position shown in Figure 13 to.Whole housing 1 is about billiard table center O 3 symmetries.
Figure 10 shows that the shape of cushion block 5 of the present invention.Cushion block 5 is one section of annulus, have identical four, wherein an outside A4 is the cylinder that radius equates with housing 1 diagonal angle annulus E3 external diameter, interior survey B4 is the sphere that radius equates with housing 1 sphere F3 radius, its upper and lower thickness equates with the four-bladed vane width K2M2 of rotor 2 quadratures, and two waist C4 and D4 are round table surface, the diameter of this round table surface upper bottom surface and bottom surface be respectively straight line P1Q1 and M1N1(as shown in Figure 1), M1P1 is its side bus, and cushion block 5 is shaped as axisymmetric.
Operation working principle of the present invention is as follows:
As shown in figure 13, in one end of oil hydraulic motor, rotor 2, blade 3, Stamping Steel Ribbon 4 and housing 1 are divided into five independently Seal cage Q1, Q2, Q3, Q4 and Q5 separately by oil pocket.
One end at rotor 2, when rotor 2 is when oil-feed initial position (as Figure 12), high pressure oil enters oil pocket Q1 from joining the oil-feed face of oil cone, as Figure 13, at this moment oil pocket Q4 and Q5 have been full of high pressure oil, and oil pocket Q2 and Q3 are low pressure oil, five pressure reduction that oil pocket forms, on rotor 2, produce moment of torsion, rotor 2 is rotated counterclockwise, then promote blade 3 and be rotated counterclockwise.When rotor 2 is rotated counterclockwise, the low pressure oil in oil pocket Q2 and Q3 is discharged by joining the oil extraction face of oil cone.When high pressure oil continuation enters oil pocket Q1, Q4 and Q5 from joining the oil-feed face of oil cone, rotor 2 continues to be rotated counterclockwise.
When rotor 2 forwards Figure 13 position to, and while continuing to be rotated counterclockwise, oil pocket Q4 becomes low pressure oil-discharging cavity then from high pressure oil suction chamber, and high pressure oil continues to enter oil pocket Q1 and Q5, and oil pocket Q2 and Q3 are still low pressure oil-discharging cavity.The moment of torsion of the poor generation of oil pressure continues drive rotor and is rotated counterclockwise, when rotor 2 rotates counterclockwise Figure 14 position, low pressure oil in oil-discharging cavity Q2 drains, and Q1 and Q5 are still high pressure oil suction chamber, Q3 and Q4 are still low pressure oil-discharging cavity, at this moment high pressure oil enters new high pressure oil suction chamber from joining the oil-feed face of oil cone again, and drive rotor 2 continues to be rotated counterclockwise.
When rotor 2 rotates to Figure 15 position and continues rotation, chamber Q5 becomes low pressure oil-discharging cavity then from high pressure oil suction chamber, and at this moment Q1 is still high pressure oil suction chamber, and Q3 and Q4 are still low pressure oil-discharging cavity, and high pressure oil continues to enter new high pressure oil suction chamber, drive rotor continues to be rotated counterclockwise.When rotor rotates counterclockwise Figure 12 position, the low pressure oil in oil-discharging cavity Q3 drains, and Q1 is still high pressure oil suction chamber, and Q4 and Q5 are still low pressure oil-discharging cavity, and high pressure oil is also entering new high pressure oil suction chamber, and drive rotor 2 continues to be rotated counterclockwise.
When rotor 2 rotates to Figure 13 position and continues rotation, chamber Q1 becomes low pressure oil-discharging cavity then from high pressure oil suction chamber.
So go round and begin again, drive rotor 2 is constantly rotated counterclockwise.At the other end of oil hydraulic motor, situation is also identical with this one end.
Above-described embodiment is used for the present invention that explains, rather than this aspect is limited, and in the protection domain of spirit of the present invention and claim, any modification and change that this aspect is made, all fall into protection scope of the present invention.
Claims (2)
1. a new blade oil motor, it is characterized in that, comprise housing (1), rotor (2), blade (3), Stamping Steel Ribbon (4) and cushion block (5) etc., rotor (2) is positioned at center, housing (1) is positioned at outside, blade (3) is placed in the hollow ring at housing (1) diagonal angle, also be positioned at the groove of rotor (2) simultaneously, and with rotor (2) at an angle, plane of blade (3) and the frustum cone side of rotor (2) are tangent, Stamping Steel Ribbon (4) is positioned between rotor (2) and blade (3), its plane one side and rotor (2) laminating, round table surface one side is fitted with the round table surface E1 of blade (3), cushion block (5) is positioned at the hollow ring at housing (1) diagonal angle, just in time fill up by housing (1), blade (3), the vacancy that rotor (2) and Stamping Steel Ribbon (4) form.
2. a kind of new blade oil motor according to claim 1, it is characterized in that, described blade (3) is quadrant shape, and total identical four, wherein a slice blade (3) is enclosed and formed by two plane A1, B1 and cylinder C1, sphere D1 and two round table surface E1, J1; Wherein, C1Shi center is the cylinder that centre of sphere O1, radius are identical with the radius of the cylinder E3 of the hollow ring of housing (1), D1 is that the centre of sphere is the sphere that O1 radius is identical with rotor (2) billiard table C2 radius, E1 and J1 are round table surface, the diameter of its upper bottom surface and bottom surface is respectively straight line R1S1 and straight line M1N1, and M1R1 and N1S1 are its side buses; Two plane A1 are parallel with B1; The distance of two parallel plane A1 and B1 is the thickness of blade (3), and blade (3) thickness equates with the hollow ring width of housing (1);
Described Stamping Steel Ribbon (4) has identical eight, wherein an E1 side is round table surface, the diameter of its upper bottom surface and bottom surface is respectively straight line R1S1 and P1Q1, P1R1 and N1S1 are its side buses, K1 side is plane, cross axis and this plane parallel of centre of sphere O1, its perpendicular distance is half of four-bladed vane thickness of slab of rotor (2) quadrature, G1 is that the centre of sphere is the sphere that O1 radius equates with rotor (2) center billiard table C2 radius, F1 is that the centre of sphere is the sphere that O1 radius equates with housing (1) sphere F3 radius, two faces of H1 and I1 are parallel planes, the width of Stamping Steel Ribbon (4) equates with blade (3) thickness, blade (3) and Stamping Steel Ribbon (4) are axisymmetric,
It in the middle of described rotor (2), is the parallel dolioform billiard table that cuts out two spherical crowns in two, in the middle of billiard table, as symmetry, insert the four-bladed vane of a quadrature, cydariform billiard table two is two identical hollow round tables, A2 is parallel disk with B2, R2 is parallel circle with S2, C2 and D2 are that the centre of sphere is the sphere of O2, I2 and J2 are orthogonal two planes, a blade (3) and two Stamping Steel Ribbons (4) are vertically placed in the groove between I2 and J2, just in time completely closely sealed, E2 is that the centre of sphere is the sphere that O2 radius is identical with housing (1) sphere F3 radius with F2, G2 and H2 are two identical hollow round table part sides, one upper and lower two ends of side round platform were respectively disk A2 and circle R2, upper and lower two ends of opposite side round platform are respectively disk B2 and circle S2, the length of straigh line of K2M2 is the width of rotor (2), two frustum cone side G2 and H2 and corresponding housing (1) hollow ring parallel plane C3 and D3 fit, whole rotor (2) is not only about billiard table center O 2 symmetries, also be axisymmetric,
Described housing (1) is the parallel dolioform sphere that cuts out two spherical crowns in two, thickness equates with the width K2M2 of rotor (2), A3 is the parallel disk that two radiuses equate with B3, sphere F3 be take O3 as the centre of sphere, radius equates with the radius of rotor (2) left and right outside E2 and F2 sphere, the diagonal angle of housing (1) sphere is a hollow ring, annulus width equates with blade (3) thickness, two side C3 of hollow ring are parallel circular planes with D3, E3 is that central shaft is by the cylinder of O3, be positioned on the diagonal of housing (1), its external diameter equates with the external diameter of blade (3) cylinder C1, and be greater than the external diameter of housing (1) sphere F3, the C3 that annulus is parallel and D3 two planes fit with corresponding rotor (2) two hollow round table side G2 and H2, whole housing (1) is about billiard table center O 3 symmetries,
Described cushion block (5) is one section of annulus, have identical four, wherein an outside A4 is the cylinder that radius equates with housing (1) diagonal angle annulus E3 external diameter, inner side B4 is the sphere that radius equates with housing (1) sphere F3 radius, its upper and lower thickness equates with the four-bladed vane width K2M2 of rotor (2) quadrature, and two waist C4 and D4 are round table surface, and the diameter of this round table surface upper bottom surface and bottom surface is respectively straight line P1Q1 and M1N1, M1P1 is its side bus, and cushion block (5) is shaped as axisymmetric.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310688751.2A CN103670896B (en) | 2013-12-16 | 2013-12-16 | A kind of vane type oil motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310688751.2A CN103670896B (en) | 2013-12-16 | 2013-12-16 | A kind of vane type oil motor |
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| Publication Number | Publication Date |
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| CN103670896A true CN103670896A (en) | 2014-03-26 |
| CN103670896B CN103670896B (en) | 2016-03-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201310688751.2A Expired - Fee Related CN103670896B (en) | 2013-12-16 | 2013-12-16 | A kind of vane type oil motor |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050186100A1 (en) * | 2004-02-23 | 2005-08-25 | Paul Weatherbee | Spherical fluid machines |
| CN101418773A (en) * | 2008-12-11 | 2009-04-29 | 宁波华液机器制造有限公司 | High performance spherical hydraulic motor |
| CN102536625A (en) * | 2011-12-30 | 2012-07-04 | 浙江大学 | Cylindrical vane hydraulic motor |
| CN102562167A (en) * | 2011-12-30 | 2012-07-11 | 浙江大学 | Shell air distribution type columnar blade pneumatic motor |
| CN102562430A (en) * | 2011-12-30 | 2012-07-11 | 浙江大学 | Shell oil distribution type hydraulic motor with cylindrical vanes |
| CN103711637A (en) * | 2013-12-16 | 2014-04-09 | 浙江大学 | Multiple-blade type oil motor |
-
2013
- 2013-12-16 CN CN201310688751.2A patent/CN103670896B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050186100A1 (en) * | 2004-02-23 | 2005-08-25 | Paul Weatherbee | Spherical fluid machines |
| CN101418773A (en) * | 2008-12-11 | 2009-04-29 | 宁波华液机器制造有限公司 | High performance spherical hydraulic motor |
| CN102536625A (en) * | 2011-12-30 | 2012-07-04 | 浙江大学 | Cylindrical vane hydraulic motor |
| CN102562167A (en) * | 2011-12-30 | 2012-07-11 | 浙江大学 | Shell air distribution type columnar blade pneumatic motor |
| CN102562430A (en) * | 2011-12-30 | 2012-07-11 | 浙江大学 | Shell oil distribution type hydraulic motor with cylindrical vanes |
| CN103711637A (en) * | 2013-12-16 | 2014-04-09 | 浙江大学 | Multiple-blade type oil motor |
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| CN103670896B (en) | 2016-03-30 |
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