CN102562431B - Shell oil distribution type hydraulic motor with spherical vanes - Google Patents
Shell oil distribution type hydraulic motor with spherical vanes Download PDFInfo
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- CN102562431B CN102562431B CN201110453415.0A CN201110453415A CN102562431B CN 102562431 B CN102562431 B CN 102562431B CN 201110453415 A CN201110453415 A CN 201110453415A CN 102562431 B CN102562431 B CN 102562431B
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Abstract
The invention discloses a shell oil distribution type hydraulic motor with spherical vanes, comprising a shell, a rotor, two vanes, two sealing strips and two gaskets; the rotor is arranged in the center, the shell is arranged at the outer part, the two vanes are respectively arranged at two sides of the rotor and placed in hollow circular rings at across corners of the shell to form a certain angle with the rotor, and the tangent value of the angle is equal to the ratio of the height of the shell to the diameter of a bottom circle of the shell; the sealing strips are arranged between the rotor and each of the vanes, the plane side of each sealing strip is jointed with one plane of the rotor, the cylindrical surface side of each sealing strip is jointed with the cylindrical surface E1 of each vane, and the gaskets are arranged in the hollow circular rings at the across corners of the shell to just fill in a gap formed by the vanes, the rotor and the sealing strips. Sealing parts of the shell oil distribution type hydraulic motor with the spherical vanes are all in surface sealing, and the shell oil distribution type hydraulic motor with the spherical vanes has the advantages of high efficiency, high specific power, large output torque, compact structure and long service life.
Description
Technical field
The present invention relates to a kind of oil hydraulic motor, particularly relate to a kind of shell and join oily formula spherical-vane hydraulic 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, and during work, blade throws away under the effect of spring or oil pressure, forms Seal cage with cylinder body.This form vane motor is owing to being seal by a Line of contact between blade and cylinder body, and therefore sealability is poor, and output torque is lower, very large friction is produced between blade and rotor and cylinder body when adding rotation, cause vane motor overall wear fast, the life-span is short, and efficiency is low.In addition, in order to ensure that blade safety can pass in and out in rotor during rotation, rotor must have suitable diameter, and the volume that is bound to like this is large, and specific power is low.
Summary of the invention
The object of the invention is for the deficiencies in the prior art, provide a kind of shell to join oily formula spherical-vane hydraulic motor, specific power of the present invention is large, and whole sealing place is again face sealing, and not easy to wear.
In order to achieve the above object, the technical solution used in the present invention is as follows: a kind of shell joins oily formula spherical-vane hydraulic motor, comprising: housing, rotor, two blades, two Stamping Steel Ribbons and two cushion blocks.Rotor is positioned at center, and housing is positioned at outside, and two blades lay respectively at the both sides of rotor, and be placed in housing diagonal angle hollow ring (i.e. guiding groove) in, with rotor at an angle, the ratio being just cut to body height and circular diameter at the bottom of housing of this angle.A plane of blade and the frustum cone side of rotor tangent, Stamping Steel Ribbon is between rotor and blade, a plane of its plane side and rotor is fitted, then fit with the cylinder E1 of blade in cylinder side, cushion block be positioned at housing diagonal angle hollow ring, just in time fill up the vacancy formed by blade, rotor and Stamping Steel Ribbon.
Described blade is enclosed by two plane A1, B1 and two cylinders C1, E1 and forms, wherein, the cylinder that cylinder C1 is center is centre of sphere O1, radius is identical with the radius of the cylinder E3 of the hollow ring of housing, cylinder E1 is center is centre of sphere O1, radius is the cylinder of O1K1, and some K1 was the vertical axis of symmetry of centre of sphere O1 and the intersection point of cylinder E1.Two plane A1 are parallel with B1, connect cylinder C1 and E1.The distance of two parallel plane A1 and B1 is vane thickness, and vane thickness is equal with the hollow ring width of housing.The length of O1K1 is the height sum of a half-sum Stamping Steel Ribbon of rotor slab-thickness.
The cylinder that being a center on the upside of described Stamping Steel Ribbon is centre of sphere O1, radius is equal with blade cylinder E1 radius, downside is a plane, the perpendicular distance of centre of sphere O1 and this underside plan is the half of rotor slab-thickness, the cylinder that cylinder G1 is center is O1, radius is equal with rotor cylinder P2 radius, the sphere that sphere F1 is the centre of sphere is O1, radius is equal with housing sphere F3 radius, plane H1 is parallel with I1, and width (i.e. the distance of plane H1 and I1) is equal with the thickness of blade.Blade and Stamping Steel Ribbon are axisymmetric.
One flat plate in the middle of described rotor, G2 with H2 is two identical director circle platform surface, be positioned at dull and stereotyped middle two waist places, one of them director circle platform is gone to the bottom as B2, upper base and dull and stereotyped connecting part are centers is the cloudy cylndrical surface P2 that the middle G1 radius of O2 radius and Stamping Steel Ribbon is identical, A2 with B2 is the parallel disk that radius is equal, I2 with J2 is parallel plate level, large sphere outside the left and right of E2 and F2 to be the centre of sphere be O2, between planar I 2 and J2, the distance of two parallel plane I2 and J2 is rotor lithographic plate thickness, the length of straigh line of K2M2 is the width of rotor, whole rotor is not only symmetrical about center O2, also be axisymmetric.
Described housing is the parallel dolioform sphere cutting out two spherical crowns in two, thickness is equal with the width K2M2 of rotor, end face A3 and bottom surface B3 are the parallel disks that radius is equal, sphere F3 take O3 as the centre of sphere, the sphere that radius is equal with the radius of large sphere E2 and F2 in outside about rotor, the diagonal angle of housing sphere is a hollow ring, two side C3 with D3 of hollow ring are parallel planar circulars, E3 is the cylinder of central shaft by O3, be positioned on the diagonal of housing, the spatial position of the two plane C3 that hollow ring is parallel and D3 is to determine as follows: guarantee assembles rear C3 and D3 two plane and corresponding rotor two frustum cone side G2 and H2 fits respectively, the sphere of K3G3H3 is oil-feed face, the position of G3H3 is when rotor forwards the position perpendicular to the dull and stereotyped left side plan of rotor during paper position to by paper position, the sphere of L3I3J3 is oil extraction face, the position of I3J3 is when rotor is forwarded to perpendicular to paper position by paper position, the position of the dull and stereotyped right side plan of rotor.Whole housing is symmetrical about billiard table center O3.
Described cushion block is one section of annulus, its outer side surface A4 is the cylinder that radius is equal with housing hollow ring E3 external diameter, inner side surface B4 is the sphere that radius is equal with housing sphere F3 radius, two waist C4 and D4 are the cylinders that radius is equal with the radius of blade bottom surface cylinder E1, and the thickness of cushion block is identical with vane thickness.Cushion block shape is axisymmetric.
High pressure oil inputs from the oil-feed face of the sphere K3G3H3 of housing, and low pressure oil exports from the oil extraction face of the sphere L3I3J3 of housing, and oil hydraulic motor output torque is to load.
The invention has the beneficial effects as follows:
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 shape schematic diagram of the present invention
Fig. 2 is the left view of Fig. 1;
Fig. 3 is gasket structure schematic diagram of the present invention;
Fig. 4 be in Fig. 3 Q1 to schematic diagram;
Fig. 5 is rotor structure schematic diagram of the present invention;
Fig. 6 is the W-W sectional view of Fig. 5;
Fig. 7 is shell construction schematic diagram of the present invention;
Fig. 8 is the sectional view of housing;
Fig. 9 is the M-M sectional view of Fig. 8;
Figure 10 is overall structure schematic diagram of the present invention;
Figure 11 is that the K of Figure 10 is to schematic diagram;
Figure 12 is the N-N sectional view of Figure 10;
Figure 13 is running principle schematic diagram of the present invention;
Figure 14 is the U-U sectional view of Figure 10;
Figure 15 is working procedure principle schematic of the present invention;
Figure 16 is the V-V sectional view of Figure 13;
Figure 17 is working procedure principle schematic of the present invention;
In figure: housing 1, rotor 2, blade 3, Stamping Steel Ribbon 4, cushion block 5.
Embodiment
As shown in figure 13, shell of the present invention is joined oily formula spherical-vane hydraulic motor and is comprised: housing 1, rotor 2, two blades 3, two Stamping Steel Ribbons 4 and two cushion blocks 5.Rotor 2 is positioned at center, housing 1 is positioned at outside, and two blades 3 lay respectively at the both sides of rotor 2, and be placed in housing 1 diagonal angle hollow ring (i.e. guiding groove) in, with rotor 2 at an angle, this angle be just cut to housing 1 height and the ratio of housing 1 end circular diameter.A plane of blade 3 and the frustum cone side of rotor 2 tangent, Stamping Steel Ribbon 4 is between rotor 2 and blade 3, a plane of its plane side and rotor 2 is fitted, then fit with the cylinder E1 of blade 3 in cylinder side, cushion block 5 be positioned at housing 1 diagonal angle hollow ring, just in time fill up the vacancy formed by blade 3, rotor 2 and Stamping Steel Ribbon 4.
Fig. 1 and the shape that Figure 2 shows that blade 3 of the present invention.Blade 3 is enclosed by two plane A1, B1 and two cylinders C1, E1 and forms, wherein, the cylinder that cylinder C1 is center is centre of sphere O1, radius is identical with the radius of the cylinder E3 of the hollow ring of housing 1, cylinder E1 is center is centre of sphere O1, radius is the cylinder of O1K1, and some K1 was the vertical axis of symmetry of centre of sphere O1 and the intersection point of cylinder E1.Two plane A1 are parallel with B1, connect cylinder C1 and E1.The distance of two parallel plane A1 and B1 is blade 3 thickness, and blade 3 thickness is equal with the hollow ring width of Fig. 8 housing 1.The length of O1K1 is the height sum of a half-sum Stamping Steel Ribbon 4 of Fig. 6 rotor 2 slab-thickness.
Fig. 3 and the shape that Figure 4 shows that Stamping Steel Ribbon 4 of the present invention.As shown in Figure 4, the cylinder that being a center on the upside of Stamping Steel Ribbon 4 is centre of sphere O1, radius is equal with blade 3 cylinder E1 radius, downside is a plane, the perpendicular distance of centre of sphere O1 and this underside plan is the half of Fig. 6 rotor 2 slab-thickness, the cylinder that cylinder G1 is center is O1, radius is equal with Fig. 5 rotor 2 cylinder P2 radius, the sphere that sphere F1 is the centre of sphere is O1, radius is equal with Fig. 8 housing 1 sphere F3 radius, plane H1 is parallel with I1, and width (i.e. the distance of plane H1 and I1) is equal with the thickness of blade 3.Blade 3 and Stamping Steel Ribbon 4 are axisymmetric.
Fig. 5 and the shape that Figure 6 shows that rotor 2 of the present invention.One flat plate in the middle of rotor 2, G2 with H2 is two identical director circle platform surface, be positioned at dull and stereotyped middle two waist places, one of them director circle platform is gone to the bottom as B2, upper base and dull and stereotyped connecting part are centers is the cloudy cylndrical surface P2 that O2 radius is identical with Stamping Steel Ribbon 4 middle G1 radius, A2 with B2 is the parallel disk that radius is equal, I2 with J2 is parallel plate level, large sphere outside the left and right of E2 and F2 to be the centre of sphere be O2, between planar I 2 and J2, the distance of two parallel plane I2 and J2 is rotor 2 lithographic plate thickness, the length of straigh line of K2M2 is the width of rotor 2, whole rotor 2 is not only symmetrical about center O2, also be axisymmetric.
Fig. 7, Fig. 8 and Figure 9 shows that the shape of housing 1 of the present invention.Housing 1 is the parallel dolioform sphere cutting out two spherical crowns in two, thickness is equal with the width K2M2 of rotor 2, end face A3 and bottom surface B3 are the parallel disks that radius is equal, sphere F3 take O3 as the centre of sphere, the sphere that radius is equal with the radius of large sphere E2 and F2 in rotor about 2 outside, the diagonal angle of housing 1 sphere is a hollow ring, two side C3 with D3 of hollow ring are parallel planar circulars, E3 is the cylinder of central shaft by O3, be positioned on the diagonal of housing 1, the spatial position of the two plane C3 that hollow ring is parallel and D3 is to determine as follows: guarantee assembles rear C3 and D3 two plane and corresponding rotor 2 liang of frustum cone side G2 and H2 fit respectively, the sphere of K3G3H3 is oil-feed face, the position of G3H3 is when rotor 2 forwards to as shown in fig. 13 that perpendicular to the position of rotor 2 dull and stereotyped left side plan during paper position in paper position as shown in Figure 5, the sphere of L3I3J3 is oil extraction face, the position of I3J3 is when paper position forwards to as shown in fig. 13 that perpendicular to paper position rotor 2 as shown in Figure 5, the position of the dull and stereotyped right side plan of rotor 2.Whole housing 1 is symmetrical about billiard table center O3.
The shape of cushion block 5 has been shown in Figure 12.Cushion block 5 is one section of annulus, its outer side surface A4 is the cylinder that radius is equal with housing 1 hollow ring E3 external diameter, inner side surface B4 is the sphere that radius is equal with housing 1 sphere F3 radius, two waist C4 and D4 are the cylinders that radius is equal with the radius of blade 3 bottom surface cylinder E1, and the thickness of cushion block 5 is identical with blade 3 thickness.Cushion block 5 shape is axisymmetric.
As shown in Figure 6, after ball-type blade hydraulic pump of the present invention assembles, center O1, O2, O3 of each parts overlap.
Operation working principle of the present invention is as follows: as Figure 15, and in one end of vane motor, rotor 2, blade 3, oil pocket is divided into three respective independently Seal cage Q1, Q2 and Q3 by Stamping Steel Ribbon 4 and housing 1.In one end of rotor 2, when rotor 2 is in oil-feed initial position (as Figure 10 or 6a), high pressure oil enters oil pocket Q1 from the oil-feed face of housing, as Figure 15, at this moment oil pocket Q3 is filled with high pressure oil, and oil pocket Q2 is then low pressure oil, the pressure reduction that three oil pockets are formed, rotor produces moment of torsion, rotor is rotated counterclockwise, then promote blade and be rotated counterclockwise.When rotor is rotated counterclockwise, the low pressure oil in oil pocket Q2 is discharged by the oil extraction face of housing.When high pressure oil continues to enter oil pocket Q1 from the oil-feed face of housing, rotor continues to be rotated counterclockwise.When rotor forwards Figure 16 position to, and when continuing to be rotated counterclockwise, oil pocket Q3 becomes low pressure oil-discharging cavity then from high pressure oil suction chamber, and high pressure oil then continues to enter oil pocket Q1, and oil pocket Q2 is still low pressure oil-discharging cavity.The moment of torsion that oil pressure difference produces continues drive rotor and is rotated counterclockwise, as Figure 17.At this moment Q1 is high pressure oil suction chamber, Q2 and Q3 is low pressure oil-discharging cavity.When rotor rotates counterclockwise Figure 14 position, the low pressure oil in oil-discharging cavity Q2 drains, and Q1 is still high pressure oil suction chamber, and Q3 is still low pressure oil-discharging cavity, and at this moment high pressure oil enters new high pressure oil suction chamber from the oil-feed face of housing again, and drive rotor continues to be rotated counterclockwise.When rotor rotates to Figure 16 position, oil pocket Q1 becomes low pressure oil-discharging cavity then from high pressure oil suction chamber, and at this moment Q3 is still low pressure oil-discharging cavity, and high pressure oil continues to enter new high pressure oil suction chamber, and drive rotor continues to be rotated counterclockwise.So go round and begin again, drive rotor is constantly rotated counterclockwise.At the other end of oil hydraulic motor, situation is also identical with this one end.
Compared with the patent application (number of patent application is 200810162987.1) before inventor, Stamping Steel Ribbon becomes two from four, the Stamping Steel Ribbon matched with a blade becomes a whole piece from two of dividing right and left, and which not only simplifies structure, and improves sealing effect and reliability.Meanwhile, become director circle platform from sphere in the middle of rotor, make rotor intermediate volume less, space is larger.Thus output torque and specific power are increased considerably.
Above-described embodiment is used for explaining and the present invention is described, instead of limits this aspect, and in the protection domain of spirit of the present invention and claim, any amendment make this aspect and change, all fall into protection scope of the present invention.
Claims (1)
1. shell joins an oily formula spherical-vane hydraulic motor, it is characterized in that, it comprises housing (1), rotor (2), two blades (3), two Stamping Steel Ribbons (4) and two cushion blocks (5); Rotor (2) is positioned at housing (1) center, housing (1) is positioned at outside, two blades (3) lay respectively at the both sides of rotor (2), and be placed in the hollow ring at housing (1) diagonal angle, with rotor (2) at an angle, this angle be just cut to housing (1) height and the ratio of housing (1) end circular diameter, described hollow ring is guiding groove; A plane of blade (3) and the frustum cone side of rotor (2) tangent, Stamping Steel Ribbon (4) is positioned between rotor (2) and blade (3), a plane of its plane side and rotor (2) is fitted, then fit with the cylinder E1 of blade (3) in cylinder side, cushion block (5) is positioned at the hollow ring at housing (1) diagonal angle, just in time fills up the vacancy formed by blade (3), rotor (2) and Stamping Steel Ribbon (4); Described blade (3) is enclosed by two plane A1, B1 and two cylinders C1, E1 and forms, wherein, the cylinder that cylinder C1 is center is centre of sphere O1, radius is identical with the radius of the cylinder E3 of the hollow ring of housing (1), cylinder E1 is center is centre of sphere O1, radius is the cylinder of O1K1, and some K1 was the vertical axis of symmetry of centre of sphere O1 and the intersection point of cylinder E1; Two plane A1 are parallel with B1, connect cylinder C1 and E1; The distance of two parallel plane A1 and B1 is blade (3) thickness, and blade (3) thickness is equal with the hollow ring width of housing (1); The length of O1K1 is the height sum of a half-sum Stamping Steel Ribbon (4) of rotor (2) slab-thickness;
The cylinder that described Stamping Steel Ribbon (4) upside is a center is centre of sphere O1, radius is equal with blade (3) cylinder E1 radius, downside is a plane, the perpendicular distance of centre of sphere O1 and this underside plan is the half of rotor (2) slab-thickness, the cylinder that cylinder G1 is center is centre of sphere O1, radius is equal with rotor (2) cylinder P2 radius, the sphere that sphere F1 is the centre of sphere is O1, radius is equal with housing (1) sphere F3 radius, plane H1 is parallel with I1, width is equal with the thickness of blade (3), and described width is the distance of plane H1 and I1; Blade (3) and Stamping Steel Ribbon (4) are axisymmetric;
Described rotor is one flat plate in the middle of (2), G2 with H2 is two identical director circle platform surface, be positioned at dull and stereotyped middle two waist places, one of them director circle platform is gone to the bottom as B2, upper base and dull and stereotyped connecting part are centers is centre of sphere O2, the cloudy cylndrical surface P2 that radius is identical with cylinder G1 radius in the middle of Stamping Steel Ribbon (4), A2 with B2 is the parallel disk that radius is equal, I2 with J2 is parallel plate level, large sphere outside the left and right of E2 and F2 to be the centre of sphere be O2, between planar I 2 and J2, the distance of two parallel plane I2 and J2 is rotor (2) slab-thickness, the length of straigh line of K2M2 is the width of rotor (2), K2 is the intersection point of the orthographic projection of sphere E2 and the orthographic projection of disk B2, M2 is the intersection point of the orthographic projection of sphere E2 and the orthographic projection of disk A2, whole rotor (2) is not only symmetrical about centre of sphere O2, is also axisymmetric,
Described housing (1) is the parallel dolioform sphere cutting out two spherical crowns in two, thickness is equal with the width K2M2 of rotor (2), end face A3 and bottom surface B3 are the parallel disks that radius is equal, sphere F3 take O3 as the centre of sphere, the sphere that radius is equal with the radius of large sphere E2 and F2 in outside, rotor (2) left and right, the diagonal angle of housing (1) sphere is a hollow ring, two side C3 with D3 of hollow ring are parallel planar circulars, E3 is the cylinder of central shaft by centre of sphere O3, be positioned on the diagonal of housing (1), the spatial position of the two plane C3 that hollow ring is parallel and D3 is to determine as follows: guarantee assembles rear C3 and D3 two plane and corresponding rotor (2) two frustum cone side G2 and H2 fits respectively, the sphere of K3G3H3 is oil-feed face, the position of G3H3 is when rotor (2) forwards the position perpendicular to rotor (2) dull and stereotyped left side plan during paper position to by paper position, K3 is the intersection point of the orthographic projection of the side D3 of hollow ring and the orthographic projection of bottom surface B3, G3 is the intersection point of the orthographic projection of the orthographic projection of the plane at circular arc G3H3 place and the side D3 of hollow ring, H3 is the intersection point of the orthographic projection of the plane at circular arc G3H3 place and the orthographic projection of bottom surface B3, the sphere of L3I3J3 is oil extraction face, the position of I3J3 is when rotor (2) is forwarded to perpendicular to paper position by paper position, the position of rotor (2) dull and stereotyped right side plan, L3 is the intersection point of the orthographic projection of the side C3 of hollow ring and the orthographic projection of end face A3, J3 is the intersection point of the orthographic projection of the orthographic projection of the plane at I3J3 place and the side C3 of hollow ring, and I3 is the intersection point of the orthographic projection of the plane at I3J3 place and the orthographic projection of end face A3, whole housing (1) is symmetrical about centre of sphere O3,
Described centre of sphere O1, centre of sphere O2, centre of sphere O3 all with housing (1) center superposition;
Described cushion block (5) is one section of annulus, its outer side surface A4 is the cylinder that radius is equal with the radius of housing (1) hollow ring E3 outer side surface, inner side surface B4 is the sphere that radius is equal with housing (1) sphere F3 radius, two waist C4 and D4 are the cylinders that radius is equal with the radius of blade (3) bottom surface cylinder E1, and the thickness of cushion block (5) is identical with blade (3) thickness; Cushion block (5) shape is axisymmetric;
High pressure oil inputs from the oil-feed face of the sphere K3G3H3 of housing (1), and low pressure oil exports from the oil extraction face of the sphere L3I3J3 of housing (1), and oil hydraulic motor output torque is to load.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110453415.0A CN102562431B (en) | 2011-12-30 | 2011-12-30 | Shell oil distribution type hydraulic motor with spherical vanes |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110453415.0A CN102562431B (en) | 2011-12-30 | 2011-12-30 | Shell oil distribution type hydraulic motor with spherical vanes |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102562431A CN102562431A (en) | 2012-07-11 |
| CN102562431B true CN102562431B (en) | 2015-05-06 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110453415.0A Expired - Fee Related CN102562431B (en) | 2011-12-30 | 2011-12-30 | Shell oil distribution type hydraulic motor with spherical vanes |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102562431B (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2043783A (en) * | 1979-01-04 | 1980-10-08 | Jocottet Sa Ets | Rotary Positive-displacement Fluid-machines |
| CN1284607A (en) * | 2000-09-11 | 2001-02-21 | 孙会英 | Hydraulic double-blade pump and its motor |
| 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 |
-
2011
- 2011-12-30 CN CN201110453415.0A patent/CN102562431B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2043783A (en) * | 1979-01-04 | 1980-10-08 | Jocottet Sa Ets | Rotary Positive-displacement Fluid-machines |
| CN1284607A (en) * | 2000-09-11 | 2001-02-21 | 孙会英 | Hydraulic double-blade pump and its motor |
| 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 |
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| Publication number | Publication date |
|---|---|
| CN102562431A (en) | 2012-07-11 |
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