CN111140564A - Blade swing hydraulic cylinder with floating side plates and floating blades - Google Patents
Blade swing hydraulic cylinder with floating side plates and floating blades Download PDFInfo
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- CN111140564A CN111140564A CN201811299177.0A CN201811299177A CN111140564A CN 111140564 A CN111140564 A CN 111140564A CN 201811299177 A CN201811299177 A CN 201811299177A CN 111140564 A CN111140564 A CN 111140564A
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- 238000007667 floating Methods 0.000 title claims abstract description 300
- 238000003825 pressing Methods 0.000 claims abstract description 69
- 238000005299 abrasion Methods 0.000 claims abstract description 5
- 238000007789 sealing Methods 0.000 claims description 41
- 238000003860 storage Methods 0.000 claims description 24
- 230000006835 compression Effects 0.000 claims description 20
- 238000007906 compression Methods 0.000 claims description 20
- 238000013016 damping Methods 0.000 claims description 13
- 229910000881 Cu alloy Inorganic materials 0.000 claims description 4
- 229910000851 Alloy steel Inorganic materials 0.000 claims description 2
- 239000000463 material Substances 0.000 claims description 2
- 238000003466 welding Methods 0.000 claims description 2
- 239000000956 alloy Substances 0.000 claims 1
- 230000008859 change Effects 0.000 abstract description 3
- 239000003921 oil Substances 0.000 description 57
- 230000000712 assembly Effects 0.000 description 12
- 238000000429 assembly Methods 0.000 description 12
- 230000009471 action Effects 0.000 description 9
- 238000009434 installation Methods 0.000 description 4
- 238000005056 compaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005461 lubrication Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000010720 hydraulic oil Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000003566 sealing material Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/08—Characterised by the construction of the motor unit
- F15B15/12—Characterised by the construction of the motor unit of the oscillating-vane or curved-cylinder type
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/20—Other details, e.g. assembly with regulating devices
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2215/00—Fluid-actuated devices for displacing a member from one position to another
- F15B2215/30—Constructional details thereof
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- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
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Abstract
The invention provides a blade swing hydraulic cylinder with a floating side plate and a floating blade, which comprises a stator assembly (1), a rotor assembly (2), a floating side plate assembly (3), an end cover assembly (4) and a connecting screw (5), wherein the stator and the rotor blade divide a closed space inside the swing cylinder into a high-pressure working cavity and a low-pressure working cavity; pressure oil in the high-pressure cavity enters a plurality of oil chambers formed by the pressing pistons and the counter bores on the back surface of the floating side plate through the oil holes to generate hydraulic pressing force, and the floating side plate is pressed on the end surface of the blade, so that the fit clearance of the floating side plate and the blade is not influenced by working pressure and rotor rotation angle change; the floating blades of the stator and the rotor are pressed on the respective matching surfaces through spring force and hydraulic force, and the abrasion loss of the blade top end can be automatically compensated, so that the matching clearance between the blade top end and the matching surfaces is kept unchanged. The invention reduces the internal leakage of oil between the high-pressure working chamber and the low-pressure working chamber of the oscillating cylinder, improves the rated working pressure, efficiency and controllability and prolongs the service life.
Description
Technical Field
The invention relates to a blade swing hydraulic cylinder, in particular to a blade swing hydraulic cylinder with a floating side plate and a floating blade, and belongs to the technical field of hydraulic components and equipment.
Background
The blade swing hydraulic cylinder (hereinafter referred to as a swing cylinder) is also called a blade swing hydraulic motor, can directly convert hydraulic pressure acting on the blade into torque output, has the advantages of compact structure, no intermediate transmission link, stable torque output, good controllability and the like, and has wide application in the fields of ship steering engines, hydraulic manipulators, torsion test equipment, metallurgical machinery, engineering machinery and the like.
The common oscillating cylinder comprises a stator, a rotor, an end cover, a sealing piece, a connecting piece and the like, and can be divided into a single blade type, a double blade type, a multi-blade type and the like according to the number of blades, wherein the single blade type and the double blade type are commonly used; the single-blade swinging cylinder only has one stator blade (also called a stop, hereinafter called stator blade) and one rotor blade, and the double-blade swinging cylinder is provided with two stator blades which are positioned on the stator and symmetrically arranged at an angle of 180 degrees and two rotor blades which are positioned on the rotor and symmetrically arranged at an angle of 180 degrees; the stator blade and the rotor blade of the oscillating cylinder divide the inside of the oscillating cylinder into a high-pressure cavity and a low-pressure cavity by a closed space formed by the stator, the rotor and the front end cover and the rear end cover, the single-blade oscillating cylinder is provided with the high-pressure cavity and the low-pressure cavity, the double-blade oscillating cylinder is provided with the two symmetrically-arranged high-pressure cavities and the two symmetrically-arranged low-pressure cavities, and oil ducts are communicated between the two high-pressure cavities and the two low-pressure cavities; the oscillating cylinder drives the rotor to rotate by utilizing the difference of hydraulic pressure acted on the rotor blades by oil in the high-pressure cavity and the low-pressure cavity, and outputs torque and rotating speed; the rotating direction and the output torque direction of the output shaft can be changed by changing the inlet and outlet directions of the hydraulic oil.
The internal leakage of oil between the high-pressure cavity and the low-pressure cavity in the oscillating cylinder has decisive influence on the performance of the oscillating cylinder; the inner leakage paths of the oscillating cylinder are mainly three, namely leakage between two end faces of the stator blade and the rotor blade and front and rear end covers, leakage between the top end of the rotor blade and the inner surface of the stator, and leakage between the top end of the stator blade and the outer surface of the rotor shaft.
The leakage is greatly influenced by the working pressure of the oscillating cylinder and the rotation angle of the rotor, the gaps between the end surfaces of the blades and the end covers and between the top ends of the blades and the matching surfaces are increased along with the increase of the working pressure and the rotation angle of the rotor, the leakage amount is increased, and the problem of internal leakage of the oscillating cylinder under the high-pressure working condition is difficult to effectively solve by adopting the traditional methods of improving the rigidity of the end covers, sealing materials, sealing structures and the like.
Disclosure of Invention
The invention provides a vane swing hydraulic cylinder with floating side plates and floating vanes, aiming at the problem that the internal leakage between high and low pressure cavities of the vane swing hydraulic cylinder changes along with the working pressure and the rotor rotation angle in the background technology.
The blade swing hydraulic cylinder is characterized in that: the floating type motor stator comprises a stator assembly, a rotor assembly, a floating side plate assembly, an end cover assembly and a connecting screw; the rotor assembly is arranged in the stator assembly, the two floating side plate assemblies are positioned at two ends of the stator assembly, and the stator blade and the rotor blade divide a closed space formed by the stator, the rotor and the floating side plates at two sides into a high-pressure working cavity and a low-pressure working cavity of the oscillating cylinder; the two end cover assemblies are axially arranged at the outer sides of the two floating side plate assemblies and are connected with the stator assembly through screws to form a closed and complete hydraulic swing cylinder.
The stator assembly comprises a stator, stator fixed blades, stator floating blades and stator floating blade pressing springs, wherein the stator fixed blades and the stator floating blades jointly form the stator blades; the stator is of a circular ring structure, the inner surface of the stator is provided with stator fixed blades integrated with the stator, and the top ends of the stator fixed blades are provided with stator floating blade mounting grooves; the stator floating blade is a cuboid, the top end of the stator floating blade is an inwards concave cylindrical surface, a closed oil storage groove with the depth of about 0.5 mm is arranged in the middle of the top end, and a damping hole is formed between the oil storage groove and the bottom surface of the floating blade, so that the oil storage groove is communicated with the bottom of the blade; the bottom of the stator floating blade is also provided with a mounting hole of a stator floating blade pressing spring, and the stator floating blade pressing spring is mounted in the hole; the stator floating blade and the compression spring are installed in a stator floating blade installation groove at the top end of the stator fixed blade together, and the stator floating blade can move in the groove along the radial direction; on the stator ring, oil inlet and outlet are processed at two sides of the root of the stator fixed blade along the circumferential direction.
The rotor assembly comprises a rotating shaft, a shaft hub end face combined sealing ring, a rotor floating blade and a rotor floating blade pressing spring; the rotating shaft is of a step shaft structure, the middle part of the rotating shaft is a shaft hub, the diameter of the rotating shaft is large, the diameters of the two sides of the rotating shaft are small, and the rotating shaft is used as an output shaft of the swing cylinder; the outer circular surface of the shaft hub part is provided with a rotor fixed blade integrated with the rotating shaft, the top end of the rotor fixed blade is provided with a rotor floating blade mounting groove, the bottom of the mounting groove is provided with a rotor floating blade compression spring mounting hole, and the rotor floating blade compression spring is mounted in the hole; oil through grooves are also processed at the positions of the two end surfaces of the rotor fixed blade, which are close to the side edges of the blade; the floating blade of the rotor is a cuboid, the top end of the floating blade is an outward convex cylindrical surface, a closed oil storage tank with the depth of about 0.5 mm is arranged in the middle of the top end, and a damping hole is formed between the oil storage tank and the bottom surface of the floating blade, so that the oil storage tank is communicated with the bottom of the blade; the rotor floating blade is arranged in the mounting groove at the top end of the rotor fixed blade and can move along the radial direction; a shaft hub end face seal ring groove is processed in the circumferential direction of two end faces of the shaft hub part of the rotating shaft, and a shaft hub end face combined seal ring is installed; for the double-blade oscillating cylinder, two radial through oil passages which are arranged in a crossed mode and are not communicated with each other are arranged on a rotating shaft hub close to the root of a rotor fixed blade, and two high-pressure cavities and two low-pressure cavities which are symmetrically arranged are communicated.
The floating side plate assembly comprises a floating side plate, a pressing piston sealing ring, a floating side plate pre-pressing spring and a floating side plate positioning pin; the floating side plate is disc-shaped, and a through hole is formed in the middle of the floating side plate, so that a rotating shaft of the rotor can penetrate through the through hole; one side of the floating side plate is a plane and is attached to the end faces of the stator and the rotor blade; a floating side plate sealing ring groove is processed at the position, close to the outer circumference, of the plane side of the floating side plate, and a floating side plate sealing ring is installed; the other side of the floating side plate is provided with N (N is a natural number larger than 1) uniformly arranged circular counter bores, compression pistons are arranged in the counter bores, the compression pistons are small cylinders, and sealing ring grooves are formed in the outer circular surfaces of the pistons and provided with compression piston sealing rings; the pressing piston is matched with the counter bore to form a plurality of small closed cavities, and the pressing piston can axially move in the counter bore; an oil through hole is arranged between the bottom of each counter bore and the plane of the floating side plate, so that oil in the high-pressure cavity and the low-pressure cavity can be introduced into the small sealed cavity; floating side plate pre-compression springs are installed in two symmetrically arranged counter bores on one side of the counter bores of the floating side plate, a floating side plate positioning pin is installed in the center of each spring, and oil through holes are not formed in the bottoms of the two counter bores.
The end cover assembly comprises an end cover, a needle bearing and an output shaft sealing ring; a through hole is formed in the center of the end cover, and a needle roller bearing is arranged in the through hole and close to the inner end face; an output shaft sealing ring groove is machined in the through hole and close to the outer end face, and an output shaft sealing ring is installed; the inner end face of the end cover is provided with two counter bores, and the positions of the counter bores correspond to the floating side plate pre-compression spring and the floating side plate positioning pin on the floating side plate.
The invention relates to a blade swing hydraulic cylinder with a floating side plate and a floating blade, which has the following connection relationship: (1) the stator component and the rotor component are coaxially assembled together, the stator floating blade is arranged in an installation groove at the top of the stator fixed blade and is pressed on the outer circular surface of the rotor shaft hub under the action of a stator floating blade pressing spring, and the curvatures of the stator floating blade and the rotor floating blade at the contact surface are consistent to form close fit; the rotor floating blade is arranged in the mounting groove at the top of the rotor fixed blade and is tightly pressed on the inner ring surface of the stator under the action of the rotor floating blade pressing spring, and the curvatures of the rotor floating blade and the stator floating blade are consistent at the contact surface to form tight fit; (2) the two floating side plate assemblies are positioned at two sides of the stator and the rotor assembly, and the plane sides of the floating side plates are attached to the end faces of the stator, the stator blade, the rotor and the rotor blade; (3) the outer side of the floating side plate assembly is provided with an end cover assembly, and shaft heads at two ends of the rotor shaft penetrate through central holes of the floating side plate assembly and the end cover assembly and are supported on needle roller bearings of inner holes of the two end cover assemblies; (4) the end cover assembly is connected with the stator assembly together through screws; (5) a gap of about 0.5 mm is reserved between one side of the floating side plate pressing piston and the end cover, the floating side plate is pressed on the end surface of the blade by a floating side plate pre-pressing spring, and the floating side plate can move along the axial direction under the action of external force; the compressing piston can extend out under the action of oil hydraulic pressure in the small closed cavity and is in contact with the inner end face of the end cover, and the reaction force of the hydraulic pressure generated by the pressure oil in the small closed cavity and used for compressing the floating side plate acts on the end cover.
The blade swing hydraulic cylinder is structurally characterized in that: (1) the plane sides of the two floating side plates are attached to the end faces of the stator, the stator blade, the rotor blade and the shaft hub of the rotating shaft to form a high-pressure working cavity and a low-pressure working cavity of the oscillating cylinder, a small sealed cavity formed between each pressing piston and a counter bore on each floating side plate is communicated with the high-pressure cavity and the low-pressure cavity of the oscillating cylinder through oil through holes in the bottom of the small sealed cavity, pressing force for pressing the floating side plates on the end faces of the blades is generated under the action of high-pressure oil, the magnitude of the pressing force is related to the pressure of the high-pressure cavity and the rotating angle of the rotor, and the higher the working pressure; (2) the stator blade and the rotor blade are divided into a fixed blade and a floating blade, a compression spring is arranged between the fixed blade and the floating blade, so that the floating blade is compressed on a matching surface, and the floating blade can move in the radial direction in an installation groove on the fixed blade; (3) the top ends of the stator and rotor floating blades are provided with oil storage tanks, the oil storage tanks are communicated with damping holes at the bottom ends of the floating blades, so that pressure oil in a gap at the bottom of the floating blade enters the oil storage tanks at the top ends of the floating blades through the damping holes, on one hand, partial hydraulic pressure can be generated to balance the oil pressure borne by the bottom of the floating blade, and on the other hand, the top ends of the floating blades and a matching surface can be ensured to be in a good oil film lubrication state to reduce friction and abrasion; (4) oil through grooves are further formed in the positions, close to the side edges of the blades, of the two end surfaces of the rotor fixing blades and used for adjusting the connection and disconnection states of the adjacent pressing piston and the high-pressure cavity when the rotor is at a certain corner position so as to adjust the pressing force; (5) the diameter of the top end of the rotor fixed blade is slightly smaller than the diameter of the inner ring surface of the stator by about 1 mm, and the diameter of the top end of the stator fixed blade is slightly larger than the diameter of the shaft hub of the rotating shaft by about 1 mm; (6) the stator floating blade and the rotor floating blade are respectively pressed on the top end matching surfaces, and a gap of about 0.5 mm is reserved between the bottom surface of the floating blade and the top surface of the floating blade mounting groove, so that the floating blade can retract into the mounting groove under the action of external force.
The blade swing hydraulic cylinder has the following preferred scheme: in order to improve the friction characteristic of the contact surface between the end surface of the blade and the floating side plate, the floating side plate and the rotor base body are made of alloy steel materials, a layer of copper alloy with the thickness of 1-2 mm is cast or sintered on the two end surfaces of the rotor shaft hub and the two end surfaces of the rotor fixed blade, and a friction pair between the floating side plate and the end surface of the rotating shaft hub and the end surface of the rotor blade is a bimetal friction pair so as to reduce friction and abrasion.
The blade swing hydraulic cylinder has the following preferred scheme: the stator floating blade and the rotor floating blade are both made of copper alloy.
The blade swing hydraulic cylinder has the following preferred scheme: the needle roller bearing in the central hole of the end cover can be replaced by a sliding bearing to reduce the radial dimension.
The blade swing hydraulic cylinder has the following preferred scheme: the stator and the stator fixed blade, the rotor and the rotor fixed blade can be processed separately without being processed into a whole, and then are combined together in a welding or bolt connection mode and the like, so that the processing manufacturability of the stator and the stator fixed blade is improved.
The invention has the beneficial effects that: (1) pressure oil of the high-pressure cavity of the swing cylinder enters a small closed cavity on one side of the floating side plate pressing piston corresponding to the high-pressure cavity through an oil through hole on the floating side plate, so that pressing force for pressing the floating side plate on the end face of the blade is generated; when the pressure of the working cavity rises and the generated push-open force is increased, the oil pressure in the small closed cavity also correspondingly rises, the generated pressing force is correspondingly increased and is balanced with the push-open force, the floating side plate is always pressed on the end surface of the blade, a certain reasonable tiny gap is ensured, namely the gap between the end surface of the blade of the oscillating cylinder and the floating side plate is not influenced by the working pressure, so that the oscillating cylinder can work under higher pressure, and the rated working pressure and efficiency of the oscillating cylinder are improved.
(2) Along with the increase of the rotation angle of the rotor, the area of the high-pressure oil in the high-pressure cavity acting on the floating side plate is increased, the generated push-away force is increased, meanwhile, the number of small closed cavities communicated with the high-pressure cavity is increased, the generated pressing force for pressing the floating side plate is correspondingly increased and is balanced with the push-away force, so that a certain reasonable tiny gap is kept between the end surface of the blade and the floating side plate, namely the gap between the end surface of the blade of the oscillating cylinder and the floating side plate is not influenced by the change of the rotation angle of the rotor.
(3) The stator floating blade and the rotor floating blade are pressed on the matching surface through the spring force generated by the pre-compression of the spring, in addition, pressure oil in the high-pressure cavity can enter a gap between the bottom surface of the floating blade and the top surface of the fixed blade through a side surface gap on one side of the floating blade and the high-pressure cavity of the fixed blade, a radial static pressure is generated on the floating blade, so that the floating blade is pressed with the matching surface, a certain reasonable tiny gap is kept between the top end of the blade and the matching surface, the sealing effect can be ensured, and the normal rotation of the rotor is not influenced; in addition, oil storage grooves are formed in the top ends of the stator floating blades and the rotor floating blades, and damping holes are formed in the oil storage grooves to communicate with gaps at the bottoms of the floating blades, so that a good oil film lubrication state is kept between the top ends of the stator blades and a matching surface, friction and abrasion can be reduced, and controllability of the swing cylinder is improved.
(4) Because the floating vane can move in the mounting groove along the radial direction, when the top end of the floating vane is worn, the top end of the floating vane can automatically extend out to compensate the wear loss, so that the matching clearance between the floating vane and the matching surface is kept unchanged, the sealing effect is ensured, and the service life of the oscillating cylinder is prolonged.
(5) The blade swing hydraulic cylinder has the advantages of high rated working pressure, high efficiency, high controllability, long service life and the like due to the adoption of the structural scheme of the floating side plate and the floating blade.
Drawings
FIG. 1 is a schematic three-dimensional cross-sectional view of the present invention.
FIG. 2 is an exploded view of the components of the single vane swing cylinder embodiment of the present invention.
FIG. 3 is a schematic view of a stator assembly configuration of a single vane swing cylinder embodiment of the present invention.
FIG. 4 is a schematic view of the rotor assembly structure of the single vane swing cylinder embodiment of the present invention.
Fig. 5 is a schematic view of the floating side plate assembly of the present invention.
FIG. 6 is a schematic structural view of the end cap assembly of the present invention.
Fig. 7 shows the area of action of the high-pressure chamber oil and the area of action of the pressure piston generating the pressing force in the case of a single-vane wobble cylinder rotor in different angular positions.
FIG. 8 is a schematic view of the stator assembly configuration of the two-vane swing cylinder embodiment of the present invention.
FIG. 9 is a schematic structural view of a rotor assembly of an embodiment of the two-vane swing cylinder of the present invention.
FIG. 10 is a schematic view of the oil passages in the shaft hub of the dual-vane oscillating cylinder embodiment of the present invention communicating two high pressure chambers or two low pressure chambers.
In the figure: 1. the stator assembly, 2. the rotor assembly, 3. the floating side plate assembly, 4. the end cover assembly, 5. the connecting screw; 101. the stator comprises a stator, 102, a stator fixed blade, 103, a stator floating blade compression spring, 104 and a stator floating blade; 201. a rotating shaft, 202, a shaft hub end face combined sealing ring, 203, a rotor fixed blade, 204, a rotor floating blade, 205, a rotor floating blade pressing spring; 301. a floating side plate, 302, a pressing piston, 303, a pressing piston sealing ring, 304, a floating side plate positioning pin, 305, a floating side plate pre-pressing spring, 306, a floating side plate sealing ring; 401. end cover, 402, output shaft sealing ring, 403, needle bearing; a. the device comprises a first oil inlet and outlet, a second oil inlet and outlet, a stator floating blade mounting groove, a stator floating blade oil storage groove, a stator floating blade damping hole, a stator floating blade compression spring mounting hole, a rotor floating blade mounting groove, a k oil through groove, a m shaft hub end face seal ring groove, a n rotor floating blade damping hole, a p rotor floating blade oil storage groove, a q counter bore, a r floating side plate seal ring groove, a s oil through hole, a t floating side plate pre-compression spring and positioning pin mounting hole, a u output shaft seal ring groove, a v compression piston acting area generating compression force on the floating side plate, a w high-pressure working chamber acting area, an x low-pressure working chamber acting area, and a j oil duct communicating two high-pressure chambers or two low-pressure chambers on a rotating shaft hub.
Detailed Description
The technical solutions (including the preferred technical solutions) of the present invention are further described in detail below with reference to fig. 1 to 10, and any technical features and any technical solutions in the embodiments do not limit the scope of the present invention.
Example 1: referring to fig. 1, a single vane swing hydraulic cylinder having floating side plates and floating vanes includes: the stator assembly 1, the rotor assembly 2, the floating side plate assembly 3, the end cover assembly 4 and the connecting screw 5; the rotor assembly 2 is arranged in the stator assembly 1, the two floating side plate assemblies 3 are respectively positioned at two sides of the stator assembly 1 and the rotor assembly 2, and the two end cover assemblies 4 are axially arranged at the outer sides of the two floating side plate assemblies 3 and are connected with the stator assembly 1 through screws 5 to form a completely closed hydraulic swing cylinder; fig. 2 is an exploded view of the components of the swing cylinder.
Referring to fig. 3, the stator assembly 1 includes a stator 101, a stator fixed vane 102, a stator floating vane 104, and a stator floating vane hold-down spring 103, the stator fixed vane 102 and the stator floating vane 104 together constituting a stator vane; the stator fixed blade 102 and the stator 101 are processed into a whole, a stator floating blade mounting groove c is arranged on the blade, and a first oil inlet and outlet a and a second oil inlet and outlet b are processed on two sides of the root of the stator fixed blade 102 along the circumferential direction; the stator floating blade 104 is a cuboid, the top end of the stator floating blade is an inwards concave cylindrical surface, a closed oil storage groove d with the depth of about 0.5 mm is arranged in the middle of the top of the stator floating blade, and a damping hole e is arranged between the oil storage groove d and the bottom surface of the floating blade; the bottom of the floating vane is provided with two floating vane hold-down spring mounting holes f, two stator floating vane hold-down springs 103 are mounted in the holes f, then the stator floating vane 104 and its hold-down spring 103 are mounted in the groove c, and the stator floating vane 104 can move in the radial direction in the mounting groove c.
Referring to fig. 4, the rotor assembly 2 includes a rotating shaft 201, a hub end face combined seal ring 202, a rotor fixed blade 203, a rotor floating blade 204 and a rotor floating blade hold-down spring 205, wherein the rotor fixed blade 203 and the rotor floating blade 204 jointly form a rotor blade; the rotating shaft 201 is of a stepped shaft structure, the middle part of the rotating shaft is a shaft hub, the diameter of the rotating shaft is large, and the diameters of two ends of the rotating shaft are small; the rotor fixed blade 203 and the hub part of the rotating shaft 201 are processed into a whole, the top end of the blade is provided with a rotor floating blade mounting groove h, and the bottom of the mounting groove h is provided with a rotor floating blade pressing spring mounting hole g; the rotor floating blade 204 is a cuboid, the top end of the rotor floating blade is an outer convex cylindrical surface, a closed oil storage groove p with the depth of about 0.5 mm is arranged in the middle of the top of the rotor floating blade, and a damping hole n is arranged between the oil storage groove p and the bottom surface of the floating blade; the rotor floating blade pressing spring 205 is installed in the hole g, and then the rotor floating blade 204 is installed in the groove h, and the rotor floating blade 204 can move in the radial direction in the installation groove h; in the circumferential direction of two end surfaces of the shaft hub part, shaft hub end surface sealing ring grooves m are processed, and two shaft hub end surface combined sealing rings 202 are installed in the sealing ring grooves m at two ends of the shaft hub; oil through grooves k are also formed in the positions of the two end surfaces of the rotor fixed blade 203, which are close to the blade side edges.
Pressing a rotor floating blade pressing spring 205 by using a special tool to enable a rotor floating blade 204 to retract into a rotor floating blade mounting groove h; similarly, a special tool is used for pressing the stator floating blade pressing spring 103, so that the stator floating blade 104 retracts into the stator floating blade mounting groove c; the rotor assembly 2 is installed in the stator assembly 1, the special tool is removed, the stator floating blade 104 is pressed on the outer circular surface of the shaft hub of the rotating shaft 201, and the rotor floating blade 204 is pressed on the inner circular surface of the stator 101.
Referring to fig. 5, the floating side plate assembly 3 includes a floating side plate 301, a pressing piston 302, a pressing piston seal ring 303, a floating side plate positioning pin 304, a floating side plate pre-pressing spring 305, and a floating side plate plane seal ring 306; the floating side plate 301 is disc-shaped, and a through hole is formed in the middle; one side of the floating side plate 301 is a plane and is matched with the end faces of the stator and the rotor blade; a floating side plate plane sealing ring groove r is formed in the position, close to the outer circumference, of the floating side plate plane side, and the floating side plate plane sealing ring 306 is installed in the groove r; the other side of the side plate is provided with N (N is a natural number more than 1) round counter bores q; the pressing piston 302 is a small cylinder, a sealing ring groove is formed in the outer wall of the pressing piston, and a pressing piston sealing ring 303 is installed in the sealing ring groove in the outer wall of the pressing piston; installing the compaction piston 302 provided with the sealing ring in the counter bore q to form a plurality of small closed cavities, wherein the compaction piston 302 can axially move in the counter bore q; an oil through hole s is arranged between the bottom of each counter bore and the plane of the floating side plate; floating side plate pre-compression springs 305 are installed in two symmetrically arranged counter bores on one side of the counter bores of the floating side plates, floating side plate positioning pins 304 are installed in the centers of the springs, and oil through holes are not formed in the bottoms of the two counter bores.
Referring to fig. 6, the end cap assembly includes an end cap 401, an output shaft seal 402, and a needle bearing 403; a through hole is formed in the center of the end cover 401, and an output shaft sealing ring groove u is machined in the through hole and is close to the outer end face; two counter bores t are machined in the inner end face of the end cover 401 at 180-degree symmetrical positions, and the positions of the counter bores t correspond to a floating side plate pre-compression spring 305 and a floating side plate positioning pin 304 on the floating side plate assembly 3; the needle roller bearing 403 is fitted into the through hole near the inner end surface portion, and the output shaft seal 402 is fitted into the output shaft seal groove u near the outer end surface portion in the through hole.
The two floating side plate assemblies 3 are respectively installed in the two end cover assemblies 4, so that the two groups of floating side plate pre-compression springs 305 and the floating side plate positioning pins 304 on the floating side plate assemblies 3 are respectively inserted into the two counter bores t corresponding to the inner end faces of the end cover assemblies 4.
Referring to fig. 7, during operation, as the rotation angle of the rotor assembly 2 increases, the shaded area w of the floating side plate 301 acted by the high-pressure oil in the high-pressure cavity increases, and the generated force pushing the floating side plate 301 increases; meanwhile, the action area v of the small sealed cavity on the back of the floating side plate communicated with the high-pressure cavity is increased, the generated pressing force for pressing the floating side plate 301 is correspondingly increased and is balanced with the push-away force, so that a certain residual pressing force and a reasonable small gap are kept between the end surface of the blade and the floating side plate, and the gap of the end surface of the blade of the oscillating cylinder is not influenced by the change of the rotation angle of the rotor; fig. 7 shows the acting area of the oil in the high-pressure oil chamber on the floating side plate and the acting area of the pressing piston generating pressing force on the floating side plate by the back surface of the floating side plate when the rotor blade and the stator blade form an included angle of 90 degrees (fig. 7a) and an included angle of 180 degrees (fig. 7 b); in addition, oil through grooves k are formed in positions, close to the blade side edges, of two end surfaces of the rotor fixing blades 203, and are used for adjusting connection and disconnection states of the pressing pistons adjacent to the rotor blades and the high-pressure cavity when the rotor is at a certain corner position, so that the pressing force of the pressing pistons on the floating side plates is adjusted.
Example 2: a double-blade swing hydraulic cylinder with floating side plates and floating blades is characterized in that a floating side plate assembly and an end cover assembly of the double-blade swing hydraulic cylinder are the same as those of a single-blade swing hydraulic cylinder, a stator assembly and a rotor assembly of the double-blade swing hydraulic cylinder are different from those of the single-blade swing hydraulic cylinder, the stator assembly is shown in figure 8 as the difference of the stator assembly, the stator assembly is provided with two stator blades which are symmetrically arranged at 180 degrees, and the composition and the structure of the stator blades are the same as those of the stator; the difference of the rotor assembly is shown in fig. 9 and fig. 10, in fig. 9, the rotor assembly has two rotor blades symmetrically arranged at 180 degrees, the composition and structure of the rotor blades are the same as those of the rotor blades of the single-blade swing cylinder, and fig. 10 shows two mutually non-communicated oil passages j which enable two high-pressure chambers or two low-pressure chambers to communicate with each other on the shaft hub of the rotating shaft of the double-blade swing cylinder.
It will be understood by those skilled in the art that the foregoing is only a preferred embodiment of the present invention, and is not intended to limit the scope of the invention, which is to include any modifications, combinations, substitutions, improvements, etc. within the spirit and scope of the present invention.
Claims (10)
1. A vane swing hydraulic cylinder having floating side plates and floating vanes, comprising: the rotor type motor comprises a stator assembly (1), a rotor assembly (2), a floating side plate assembly (3), an end cover assembly (4) and a connecting screw (5); stator module (1) is arranged in rotor subassembly (2) inside, and two floating side plate assembly (3) are located the both sides of stator module (1) respectively, and two end cover subassembly (4) are arranged in two floating side plate assembly (3) outsides along the axial, and pass through bolt (5) hookup, its characterized in that with stator module (1): the stator component (1) comprises a stator (101), a stator fixed blade (102), a stator floating blade (104) and a stator floating blade hold-down spring (103), the stator fixed blade (102) and the stator floating blade (104) jointly form the stator blade, the stator fixed blade (102) and the stator (101) are processed into a whole or fixed together, a stator floating blade mounting groove (c) is arranged on the stator fixed blade, the stator floating blade (104) is a cuboid, the top end of the floating vane is an inwards concave cylindrical surface, a closed oil storage groove (d) is arranged in the middle of the top end, a damping hole (e) is formed between the oil storage groove (d) and the bottom surface of the stator floating vane (104), a stator floating vane pressing spring mounting hole (f) is further formed in the bottom of the stator floating vane (104), a stator floating vane pressing spring (103) is mounted in the mounting hole (f), and the stator floating vane (104) can move in the stator floating vane mounting groove (c) along the radial direction;
the rotor assembly (2) comprises a rotating shaft (201), a shaft hub end face combined sealing ring (202), a rotor fixed blade (203), a rotor floating blade (204) and a rotor floating blade pressing spring (205), wherein the rotor fixed blade (203) and the rotor floating blade (204) jointly form the rotor blade, the rotor fixed blade (203) and the rotating shaft (201) are processed into a whole or fixed together, a rotor floating blade mounting groove (h) is formed in the top end of the rotor fixed blade (203), a rotor floating blade pressing spring mounting hole (g) is formed in the bottom plane of the mounting groove (h), the rotor floating blade pressing spring (205) is mounted in the hole (g), the rotor floating blade (204) is a cuboid, the top end of the rotor floating blade is an outer convex cylindrical surface, a closed oil storage groove (p) is formed in the middle of the top end, and a damping hole (n) is formed between the oil storage groove (p) and the, the rotor floating blade (204) is arranged in the rotor floating blade mounting groove (h) and can move in the groove along the radial direction, and a shaft hub end face sealing ring groove (m) is processed in the circumferential direction of two end faces of the shaft hub part of the rotating shaft (201) and is provided with a shaft hub end face combined sealing ring (202);
the floating side plate assembly (3) comprises a floating side plate (301), a pressing piston (302), a pressing piston sealing ring (303), a floating side plate positioning pin (304), a floating side plate pre-pressing spring (305) and a floating side plate plane sealing ring (306), wherein one side of the floating side plate (301) is provided with N (N is a natural number larger than 1) circular counter bores (q), an oil through hole(s) is formed between the bottom of each counter bore and the other side of the floating side plate, the other side of the floating side plate close to the outer circumference is provided with a floating side plate plane sealing ring groove (r), the floating side plate plane sealing ring (306) is arranged in the groove (r), the pressing piston (302) is a small cylinder, the outer wall of the pressing piston is provided with a sealing ring groove, the pressing piston sealing ring (303) is arranged in the sealing ring groove, the pressing piston (302) provided with the sealing ring is arranged in, the pressing piston (302) can axially move in the counter bore (q), floating side plate pre-pressing springs (305) are mounted in two symmetrically arranged counter bores on one side of the counter bore of the floating side plate, a floating side plate positioning pin (304) is mounted in the center of each spring, and oil through holes are not formed in the bottoms of the two counter bores;
the end cover assembly (4) comprises an end cover (401), an output shaft sealing ring (402) and a needle bearing (403); a through hole is formed in the center of the end cover (401), an output shaft sealing ring groove (u) is formed in the through hole and close to the outer end face, and an output shaft sealing ring (402) is mounted in the through hole; a through hole is formed in the center of the end cover (401) and is close to the inner end face, and a needle roller bearing (403) is arranged; two counter bores (t) are machined on the inner end face of the end cover (401) at 180-degree symmetrical positions, and the diameters and the positions of the counter bores correspond to a floating side plate pre-compression spring (305) and a floating side plate positioning pin (304) on the floating side plate assembly (3).
2. The blade-oscillating hydraulic cylinder with floating side plates and floating blades as claimed in claim 1, wherein: the plane sides of the two floating side plates (301) are attached to the end faces of a stator, a stator blade, a rotor blade and a rotating shaft hub to form high-pressure and low-pressure working cavities of the oscillating cylinder, oil through holes(s) at the bottom of each counter bore (q) in the floating side plates (301) are communicated with the high-pressure and low-pressure cavities of the oscillating cylinder, pressure oil in the high-pressure working cavities of the oscillating cylinder is introduced into small closed cavities formed by a plurality of pressing pistons (302) and the counter bores (q) on the back faces of the floating side plates to generate hydraulic pressing force, the floating side plates (301) are pressed on the end faces of the blades, and the pressing force of the floating side plates is increased along with the increase of the oil pressure of the high.
3. The blade-oscillating hydraulic cylinder with floating side plates and floating blades as claimed in claim 1, wherein: the stator blade and the rotor blade are divided into a fixed blade and a floating blade, a compression spring is arranged between the fixed blade and the floating blade, the floating blade can move in the mounting groove on the fixed blade along the radial direction, the top ends of the stator floating blade and the rotor floating blade are provided with closed oil storage tanks, the oil storage tanks are communicated with the bottom ends of the floating blades through damping holes, and pressure oil in a gap at the bottom of the floating blade enters the oil storage tank at the top end of the floating blade through the damping holes.
4. The blade-oscillating hydraulic cylinder with floating side plates and floating blades as claimed in claim 1, wherein: oil through grooves (k) are further processed at the positions, close to the blade side edges, of the two end surfaces of the rotor fixed blade (203).
5. The blade-oscillating hydraulic cylinder with floating side plates and floating blades as claimed in claim 1, wherein: the diameter of the top end of the rotor fixed blade is slightly smaller than the diameter of the inner ring surface of the stator by about 1 mm; the diameter of the top end of the stator fixed blade is slightly larger than the diameter of the rotor hub and is about 1 mm larger.
6. The blade-oscillating hydraulic cylinder with floating side plates and floating blades as claimed in claim 1, wherein: and in the state that the stator floating blade and the rotor floating blade are respectively pressed on the matching surfaces, a gap of about 0.5 mm is reserved between the bottom surface of the floating blade and the top surface of the floating blade mounting groove, so that the floating blade can retract into the mounting groove.
7. The blade-oscillating hydraulic cylinder with floating side plates and floating blades as claimed in claim 1, wherein: the single-blade swing hydraulic cylinder with only one stator blade and one rotor blade can be made, and the double-blade swing cylinder with two stator blades and two rotor blades can also be made; for the double-blade oscillating cylinder, two radial oil ducts which are arranged in a crossed manner and are not communicated with each other are arranged on a shaft hub of a rotating shaft close to the root part of a rotor blade, and two high-pressure cavities and two low-pressure cavities which are symmetrically arranged are communicated with each other.
8. The blade-oscillating hydraulic cylinder with floating side plates and floating blades as claimed in claim 1, wherein: in order to improve the friction characteristic of the contact surface between the end surface of the blade and the floating side plate, the floating side plate and the rotor base body are made of alloy steel materials, a layer of copper alloy with the thickness of 1-2 mm is cast or sintered on the two end surfaces of the rotor shaft hub and the two end surfaces of the rotor fixed blade, the rotor floating blade can be made of the copper alloy materials, and each friction pair is a bimetal friction pair so as to reduce friction and abrasion.
9. The blade-oscillating hydraulic cylinder with floating side plates and floating blades as claimed in claim 1, wherein: the needle roller bearing in the central hole of the end cover can be replaced by a sliding bearing to reduce the radial dimension.
10. The blade-oscillating hydraulic cylinder with floating side plates and floating blades as claimed in claim 1, wherein: the stator and the stator fixed blade, the rotor and the rotor fixed blade can be processed separately without being processed into a whole, and then are combined together in a welding or bolt connection mode and the like, so that the processing manufacturability of the stator and the stator fixed blade is improved.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811299177.0A CN111140564A (en) | 2018-11-02 | 2018-11-02 | Blade swing hydraulic cylinder with floating side plates and floating blades |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811299177.0A CN111140564A (en) | 2018-11-02 | 2018-11-02 | Blade swing hydraulic cylinder with floating side plates and floating blades |
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| Publication Number | Publication Date |
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| CN111140564A true CN111140564A (en) | 2020-05-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811299177.0A Pending CN111140564A (en) | 2018-11-02 | 2018-11-02 | Blade swing hydraulic cylinder with floating side plates and floating blades |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114235390A (en) * | 2021-12-09 | 2022-03-25 | 中国船舶重工集团公司第七0三研究所 | Swing type actuator and method for controlling and measuring movement of clutch sliding piece |
-
2018
- 2018-11-02 CN CN201811299177.0A patent/CN111140564A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114235390A (en) * | 2021-12-09 | 2022-03-25 | 中国船舶重工集团公司第七0三研究所 | Swing type actuator and method for controlling and measuring movement of clutch sliding piece |
| CN114235390B (en) * | 2021-12-09 | 2024-04-12 | 中国船舶重工集团公司第七0三研究所 | Swing actuator and method for controlling and measuring movement of clutch sliding piece |
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Effective date of registration: 20201030 Address after: 4-413, Beijing Polytechnic University Youth Teacher apartment, 5 Zhongguancun South Street, Haidian District, Beijing 100081 Applicant after: Lu Yu Applicant after: Jing Chongbo Address before: No. 413, building 4, yard 5, South Zhongguancun Street, Haidian District, Beijing 100081 Applicant before: Lu Yu |