CN114017276B - Rotor, rotor subassembly and plunger equipment - Google Patents
Rotor, rotor subassembly and plunger equipment Download PDFInfo
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- CN114017276B CN114017276B CN202210007299.8A CN202210007299A CN114017276B CN 114017276 B CN114017276 B CN 114017276B CN 202210007299 A CN202210007299 A CN 202210007299A CN 114017276 B CN114017276 B CN 114017276B
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- 239000000463 material Substances 0.000 claims abstract description 72
- 239000000956 alloy Substances 0.000 claims description 27
- 229910045601 alloy Inorganic materials 0.000 claims description 24
- 238000009826 distribution Methods 0.000 claims description 21
- 229910000831 Steel Inorganic materials 0.000 claims description 19
- 239000010959 steel Substances 0.000 claims description 19
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 11
- 239000010949 copper Substances 0.000 claims description 11
- 229910052802 copper Inorganic materials 0.000 claims description 11
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 4
- 229910052782 aluminium Inorganic materials 0.000 claims description 4
- 239000003921 oil Substances 0.000 description 18
- 229910000881 Cu alloy Inorganic materials 0.000 description 9
- 238000007789 sealing Methods 0.000 description 8
- 230000005540 biological transmission Effects 0.000 description 5
- 238000000034 method Methods 0.000 description 3
- 230000018109 developmental process Effects 0.000 description 2
- 238000009792 diffusion process Methods 0.000 description 2
- 230000033001 locomotion Effects 0.000 description 2
- 238000005461 lubrication Methods 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 230000004323 axial length Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
- F04B1/12—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis
- F04B1/20—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis having rotary cylinder block
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03C—POSITIVE-DISPLACEMENT ENGINES DRIVEN BY LIQUIDS
- F03C1/00—Reciprocating-piston liquid engines
- F03C1/02—Reciprocating-piston liquid engines with multiple-cylinders, characterised by the number or arrangement of cylinders
- F03C1/06—Reciprocating-piston liquid engines with multiple-cylinders, characterised by the number or arrangement of cylinders with cylinder axes generally coaxial with, or parallel or inclined to, main shaft axis
- F03C1/0636—Reciprocating-piston liquid engines with multiple-cylinders, characterised by the number or arrangement of cylinders with cylinder axes generally coaxial with, or parallel or inclined to, main shaft axis having rotary cylinder block
- F03C1/0644—Component parts
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03C—POSITIVE-DISPLACEMENT ENGINES DRIVEN BY LIQUIDS
- F03C1/00—Reciprocating-piston liquid engines
- F03C1/02—Reciprocating-piston liquid engines with multiple-cylinders, characterised by the number or arrangement of cylinders
- F03C1/06—Reciprocating-piston liquid engines with multiple-cylinders, characterised by the number or arrangement of cylinders with cylinder axes generally coaxial with, or parallel or inclined to, main shaft axis
- F03C1/0636—Reciprocating-piston liquid engines with multiple-cylinders, characterised by the number or arrangement of cylinders with cylinder axes generally coaxial with, or parallel or inclined to, main shaft axis having rotary cylinder block
- F03C1/0644—Component parts
- F03C1/0652—Cylinders
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03C—POSITIVE-DISPLACEMENT ENGINES DRIVEN BY LIQUIDS
- F03C1/00—Reciprocating-piston liquid engines
- F03C1/02—Reciprocating-piston liquid engines with multiple-cylinders, characterised by the number or arrangement of cylinders
- F03C1/06—Reciprocating-piston liquid engines with multiple-cylinders, characterised by the number or arrangement of cylinders with cylinder axes generally coaxial with, or parallel or inclined to, main shaft axis
- F03C1/0636—Reciprocating-piston liquid engines with multiple-cylinders, characterised by the number or arrangement of cylinders with cylinder axes generally coaxial with, or parallel or inclined to, main shaft axis having rotary cylinder block
- F03C1/0644—Component parts
- F03C1/0663—Casings, housings
- F03C1/0665—Cylinder barrel bearing means
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
- F04B1/12—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis
- F04B1/20—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis having rotary cylinder block
- F04B1/2014—Details or component parts
- F04B1/2035—Cylinder barrels
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
- F04B1/12—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis
- F04B1/20—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis having rotary cylinder block
- F04B1/2014—Details or component parts
- F04B1/2064—Housings
- F04B1/2071—Bearings for cylinder barrels
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Reciprocating Pumps (AREA)
- Details Of Reciprocating Pumps (AREA)
Abstract
The invention provides a rotor, a rotor assembly and plunger equipment, relates to the technical field of hydraulic plungers, and aims to solve the technical problems of low pressure and low speed of a hydraulic plunger pump and a hydraulic plunger motor. The rotor is matched with an outer support bearing; the rotor comprises a cylinder body and a first sleeve, and the rigidity of the material of the cylinder body is greater than that of the material of the first sleeve; the cylinder body is provided with an outer bearing surface, the outer bearing surface is used for being matched with the outer support bearing, and the first sleeve is arranged on the outer bearing surface. The rotor assembly comprises the rotor provided by the technical scheme. The rotor provided by the invention is used in a plunger motor or a plunger pump.
Description
Technical Field
The invention relates to the field of hydraulic plungers, in particular to a rotor, a rotor assembly and plunger equipment.
Background
The rotor is one of the essential core components of the hydraulic plunger pump and the hydraulic plunger motor. In the working process of the hydraulic pump and the hydraulic motor, the rotor is one of the main high-pressure stress and structural stress parts. For an outer support hydraulic motor rotor, the friction performance of a friction pair formed by the outer support hydraulic motor rotor, a plunger body, an oil distribution cover (an oil distribution disc) and an outer support bearing is ensured, and the torque for transmitting input or output in the working process of the hydraulic motor is born.
At present, the problem of the pairing of the friction pair materials is solved, and a rotor generally adopts copper alloy. However, the development direction of the hydraulic motor in the future is small volume, high pressure, high power and light weight. The strength and rigidity of the existing copper alloy rotor cannot meet the working conditions of high speed and high pressure.
Disclosure of Invention
The invention aims to provide a rotor, a rotor assembly and plunger equipment, which can improve the service pressure, the service life and the reliability of a hydraulic plunger pump and a hydraulic plunger motor under the condition that friction pair working conditions and conditions of a rotor and a plunger body, an oil distribution disc, an outer support bearing and the like matched with the rotor can be ensured during working.
In order to achieve the above purpose, the invention provides the following technical scheme:
a rotor, the rotor cooperating with an outer support bearing;
the rotor comprises a cylinder body and a first sleeve, and the rigidity of the material of the cylinder body is greater than that of the material of the first sleeve;
the cylinder body is provided with an outer bearing surface, the outer bearing surface is used for being matched with the outer support bearing, and the first sleeve is arranged on the outer bearing surface.
According to at least one embodiment of the present invention, the rotor further includes an alloy plate, the rigidity of the material of the cylinder is greater than the rigidity of the material of the alloy plate,
the cylinder body is also provided with a first end face, the first end face is used for being coordinated with an oil distribution disc, and the alloy plate is arranged on the first end face.
According to at least one embodiment of the invention, the rotor further comprises a second sleeve, the rigidity of the material of the cylinder is greater than the rigidity of the material of the second sleeve,
the cylinder body is provided with at least one first cavity and an opening positioned on a second end face, and the opening is communicated with the first cavity;
the first cavity comprises a first cavity section and a second cavity section deviating from the first end face, the second cavity section is internally provided with the second sleeve, and the second sleeve is provided with a second cavity for the plunger to pass through;
the diameter of the second cavity is smaller than the diameter of the first cavity section.
According to at least one embodiment of the invention, the diameter of the first cavity section is smaller than the diameter of the second cavity section.
According to at least one embodiment of the present invention, the density of the material of the first sleeve, the second sleeve, and the alloy plate is greater than the density of the material of the cylinder block;
the cylinder body is made of a steel base material, and the first sleeve, the second sleeve and the alloy plate are made of a copper base material or an aluminum base material.
According to at least one embodiment of the present invention, the first sleeve, the second sleeve and the alloy plate have bonding layers between the respective cylinder block connection portions, and the materials of the bonding layers include steel-based materials and copper-based materials.
According to at least one embodiment of the invention, the second sleeve has a length L1 in the axial direction, L0 < L1 < L0+0.5d being satisfied; wherein,
l0 is the minimum contact length of the plunger and the second sleeve when the plunger extends out of the first cavity for maximum travel;
d is the diameter of the plunger.
According to at least one embodiment of the invention, when the plunger has a minimum stroke extending into the first chamber, the plunger has a minimum separation from the bottom of the first chamber, the minimum separation being 0.1d-0.3d.
Compared with the prior art, the sliding shoe has the following advantages:
according to the rotor provided by the invention, the rotor is matched with the outer support bearing; the rotor comprises a cylinder body and a first sleeve, and the rigidity of the material of the cylinder body is greater than that of the material of the first sleeve; the cylinder body is provided with an outer bearing surface, the outer bearing surface is used for being matched with an outer support bearing, and the first sleeve is arranged on the outer bearing surface. Because the material rigidity of the cylinder body is greater than that of the first sleeve, a friction pair pairing part formed between the cylinder body and the outer support bearing forms reasonable material pairing, and the friction between the cylinder body and the outer support bearing is reduced. In addition, the rigidity of the cylinder body is high, the requirements of load torque on torque transmission and pressure resistance of the rotor can be met, and the strength rigidity requirement of the rotor under the high-speed and high-pressure working condition is met. The hydraulic pump or motor using the rotor with the structure can greatly improve indexes such as rotating speed, pressure and the like.
Another object of the present invention is to provide a rotor assembly comprising the above rotor, further comprising an oil distribution pan, an outer support bearing and a plunger,
the oil distribution disc is arranged on a first end face of the cylinder body, the outer support bearing is sleeved on an outer support face of the cylinder body, and the plunger is matched with a first cavity of the cylinder body.
Compared with the prior art, the rotor assembly provided by the invention has the following advantages:
the advantages of the rotor assembly are the same as those of the rotor in the prior art, and are not described in detail herein.
Another object of the present invention is also to provide a plunger apparatus comprising the above plunger assembly.
Compared with the prior art, the plunger device has the following advantages:
the plunger device has the same advantages as the rotor described above with respect to the prior art and will not be described in detail here.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate exemplary embodiments of the invention and together with the description serve to explain the principles of the invention.
Fig. 1 is a schematic view of a rotor structure according to an embodiment of the present invention.
Fig. 2 is a schematic view of a rotor assembly structure according to an embodiment of the present invention.
Reference numerals: 1-an alloy plate; 2-cylinder body; 3-a first sleeve; 4-a second sleeve; 5-spline; 6-oil distribution disc; 7-a rotor; 8-an outer support bearing; 9-a plunger; 10-a first end face; 11-a first cavity; 12-an opening; 13-second end face.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are for purposes of illustration only and are not to be construed as limitations of the invention. It should be noted that, for convenience of description, only the portions related to the present invention are shown in the drawings.
In addition, the embodiments of the present invention and the features of the embodiments may be combined with each other without conflict. The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.
In the existing structure, in order to solve the pairing problem of friction pair materials, a rotor is generally made of copper alloy and a plunger hole of the rotor is directly pulled through. With the updating and updating requirements of hydraulic pump motors, the characteristics of small volume, high pressure, high power, light weight and the like are the future development trend, which means that the rotating speed is increased, the pressure is increased, the power is increased, and the problem of strength and rigidity brought by a high-speed and high-pressure working condition cannot be solved by a copper alloy rotor in the traditional structure. Meanwhile, under the high-speed condition, when the plunger is respectively positioned at an upper dead point and a lower dead point, the contact length between the plunger and the plunger hole is too long, so that a lubricating medium is difficult to enter the contact surfaces of the plunger and the plunger hole, and the problem of plunger locking is caused; and the contact length of plunger and plunger hole can lead to sealed inefficacy too short, and then the problem appears leaking to fluid.
Therefore, the invention needs to solve the problems that friction pair material pairing is formed by the plunger piston body, the oil distribution cover (oil distribution disc) and the outer support bearing, the requirements of load torque on rotor torque transmission and pressure resistance are ensured when the rotating speed is increased, the pressure is increased and the power is increased, and the strength and rigidity requirements of the rotor under the high-speed and high-pressure working condition are met.
Referring to fig. 1-2, according to an embodiment of the present invention, a rotor is provided, the rotor is engaged with an outer support bearing 8; the rotor comprises a cylinder body 2 and a first sleeve 3, and the rigidity of the material of the cylinder body 2 is greater than that of the material of the first sleeve 3; the cylinder block has an outer bearing surface for co-location with an outer support bearing 8, the first sleeve 3 being arranged at the outer bearing surface. Because the material rigidity of the cylinder body 2 is greater than that of the first sleeve 3, a friction pair pairing part formed between the cylinder body 2 and the outer support bearing 8 forms reasonable material pairing, and the friction between the cylinder body and the outer support bearing is reduced. In addition, the rigidity of the cylinder body 2 is high, the requirements of load torque on torque transmission and pressure resistance of the rotor can be met, and the strength rigidity requirement of the rotor under the high-speed and high-pressure working condition is met. The hydraulic pump or motor using the rotor with the structure can greatly improve indexes such as rotating speed, pressure and the like. Compared with the prior art in which the rotor material is a copper alloy, the cylinder body 2 according to the embodiment of the present invention may be made of a steel-based material, and the first sleeve 3 may be made of a copper-based material or an aluminum-based material, where the steel-based material has a greater rigidity than the copper-based material. The rotor of the embodiment of the invention can meet the requirement on the strength and rigidity of the rotor under the high-speed and high-pressure working condition. Meanwhile, a torque transmission spline 5 can be processed on a rotor made of steel base materials and is processed on the cylinder body 2 and connected with a power shaft spline to transmit the rotation torque of a plunger pump or a motor during working, and the torque can be improved by 3 times.
In some embodiments, the rotor further comprises an alloy plate 1, the material stiffness of the cylinder 2 is greater than the material stiffness of the alloy plate 1, the cylinder 2 further has a first end face 10, the first end face 10 is used for being coordinated with an oil distribution disc, and the alloy plate 1 is arranged at the first end face 10. Since the cylinder block is made of steel and the oil distribution disc 6 is also made of steel, a friction pair material formed between the cylinder block 2 and the oil distribution disc 6 causes rigid friction, and the cylinder block 2 and the oil distribution disc 6 are easily damaged. The alloy plate 1 is arranged on the first end face 10 of the cylinder body 2, the alloy plate 1 is made of copper-based materials, a copper-steel friction pair can be formed between the cylinder body 2 and the oil distribution disc 6, and the problem of friction damage between the cylinder body 2 and the oil distribution disc 6 is effectively reduced.
In some embodiments, the rotor further comprises a second sleeve 4, the material stiffness of the cylinder 2 is greater than that of the second sleeve 4, the cylinder 2 has at least one first cavity 11 and an opening 12 at a second end face 13, and the opening 12 is communicated with the first cavity 11; the first cavity 11 comprises a first cavity section and a second cavity section which is far away from the first end face 10, a second sleeve 4 is arranged in the second cavity section, and the second sleeve 4 is provided with a second cavity for the plunger 9 to pass through; the diameter of the second cavity is smaller than the diameter of the first cavity section. The plunger 9 forms a friction pair with the cylinder body 2 in the plunger hole, in order to form a copper-steel friction pair, the second sleeve 4 is added in the plunger hole, the rigidity of the second sleeve 4 is smaller than that of the cylinder body material, for example, the second sleeve 4 can be copper alloy or aluminum alloy, and the like, and the friction between the plunger 9 and the plunger hole of the cylinder body 2 is effectively reduced. The second sleeve 4 is inserted into the second end face 13 of the plunger bore, and the second sleeve 4 does not completely cover the entire plunger bore, i.e. the second sleeve 4 is arranged only in the second bore section, and has a distance L from the bottom of the plunger bore, i.e. the length of the first bore section. And since the diameter phid of the cavity of the second sleeve 4 is smaller than the diameter phih of the first cavity section, i.e. the plunger is in contact with the cavity of the second sleeve 4, it cannot be in contact with the inner wall of the first cavity section with a larger diameter. Therefore, the problem that the plunger and the plunger hole are difficult to lubricate in a sealing area can be solved by avoiding the overlong contact length of the plunger and the plunger hole and preventing lubricating oil from entering the contact surface of the plunger and the plunger hole under the high-speed condition.
In some embodiments, the diameter of the first cavity section is smaller than that of the second cavity section, that is, a stepped hole is formed in the plunger hole, and the stepped surface can limit the second sleeve 4, so that the second sleeve 4 is prevented from further sliding down to the bottom of the plunger hole due to failure in the high-speed motion process of the plunger, and the stability of the second sleeve 4 is ensured.
In some embodiments, the density of the materials of the first sleeve, the second sleeve and the alloy plate is greater than that of the material of the cylinder body, and illustratively, the materials of the first sleeve, the second sleeve and the alloy plate are copper-based materials, and the material of the cylinder body is steel-based materials.
Because the working condition of the friction pair where the first sleeve 3, the second sleeve 4 and the alloy plate 1 are located is worse, in order to ensure the fixing strength among alloys of different materials, a bonding layer is arranged among the first sleeve 3, the second sleeve 4, the alloy plate 1 and the connecting part of the corresponding cylinder body 2, and the material of the bonding layer comprises a steel-based material and a copper-based material.
During actual use, the first sleeve 3, the second sleeve 4, the alloy plate 1 and the corresponding cylinder body 2 are fixedly connected together in a diffusion welding or fusion casting mode, so that a bonding layer is generated at a connecting interface of the copper alloy material and the steel-based material, a certain diffusion layer (bonding layer) is arranged between the copper alloy material and the steel-based material, the working strength of the rotor can be met, and the bonding strength of the copper alloy material and the steel-based material meets the requirement of high-speed movement of the rotor in a plunger motor.
In some embodiments, considering the need to control the sealing length between the plunger 9 and the plunger hole, the problem of "plunger locking" caused by lubrication difficulty due to the excessively long sealing length between the plunger and the plunger hole when the plunger is respectively at the top dead center and the bottom dead center under a high-speed condition can be avoided. In addition, when the plunger is respectively positioned at the top dead center and the bottom dead center under the high-speed condition, the sealing length of the plunger and the plunger hole is too short, so that the sealing is failed, and the leakage problem is considered. The axial length L1 of the second sleeve is required to satisfy that L0 is more than L1 and more than L0+0.5d; wherein L0 is the minimum contact length of the plunger and the second sleeve when the plunger has the maximum stroke after extending out of the first cavity 11; d is the diameter of the plunger. Referring to fig. 2, L0 is the plunger at the maximum stroke Smax, i.e. the plunger is at the top dead center, and L0 generally takes a value between 1.4d and 2.5d in order to prevent the plunger from being stuck and maintain a sufficient sealing length.
In some embodiments, in order to prevent the plunger 9 from interfering with the cylinder 2, the end surface of the plunger 9 has a minimum spacing from the bottom of the first chamber 11 when the plunger 9 is running to bottom dead center, i.e. the plunger is at a minimum stroke, wherein the minimum spacing is 0.1d-0.3d.
Referring to fig. 2, an embodiment of the present invention further provides a rotor assembly, including the rotor in the above technical solution, the rotor assembly further includes an oil distribution disc 6, an outer support bearing 8 and a plunger 9, the oil distribution disc 6 is disposed on a first end surface 10 of the cylinder body 2, the outer support bearing 8 is sleeved on an outer support surface of the cylinder body 2, and the plunger 9 is matched with a first cavity 11 of the cylinder body 2.
The embodiment of the invention also provides plunger equipment comprising the rotor assembly in the technical scheme.
For specific function realization and effect of the plunger device provided by the embodiment of the invention, please refer to the description of the rotor, which is not repeated herein.
The plunger device of the embodiment of the present invention includes a plunger motor or a plunger pump, and the sliding shoe of the embodiment of the present invention may be applied to the plunger pump and the plunger motor in various fields such as aerospace, engineering machinery, and ships.
The embodiment of the invention not only solves the material requirement of the pairing of three pairs of friction pairs of a rotor and a plunger body, a rotor and an oil distribution disc and a rotor and an outer support bearing in the plunger pump or the plunger motor, reduces friction, can solve the requirements of load torque on torque transmission and pressure resistance of the rotor through the steel cylinder body, and compared with the traditional copper cylinder body, the steel cylinder body of the embodiment of the invention can have larger torque transmitted through a spline and is more suitable for the working conditions of high speed and high pressure. Meanwhile, the contact length of the plunger and the plunger hole at the upper dead point and the lower dead point is reasonably controlled, so that the problem that the sealing is ineffective due to the excessively short sealing length of the plunger at the upper dead point can be avoided, and the problem that the plunger is locked due to the difficult lubrication due to the excessively long length of the plunger at the lower dead point can be avoided. Meanwhile, a certain distance is reserved between the end face of the plunger and the bottom of the plunger hole at the bottom dead center, so that the interference between the plunger and the cylinder body is prevented.
In the description herein, reference to the description of the terms "one embodiment/mode," "some embodiments/modes," "example," "specific example," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment/mode or example is included in at least one embodiment/mode or example of the application. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment/mode or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments/modes or examples. Furthermore, the various embodiments/aspects or examples and features of the various embodiments/aspects or examples described in this specification can be combined and combined by one skilled in the art without conflicting therewith.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present application, "plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
It will be understood by those skilled in the art that the foregoing embodiments are merely for clarity of description and are not intended to limit the scope of the invention. Other variations or modifications will be apparent to persons skilled in the art in light of the above disclosure and which are within the scope of the invention.
Claims (6)
1. A rotor, wherein the rotor is engaged with an outer support bearing;
the rotor comprises a cylinder body and a first sleeve, and the rigidity of the material of the cylinder body is greater than that of the material of the first sleeve;
the cylinder body is provided with an outer bearing surface which is used for being matched with the outer support bearing, and the first sleeve is arranged on the outer bearing surface;
the rotor also comprises an alloy plate, the rigidity of the material of the cylinder body is greater than that of the alloy plate,
the cylinder body is also provided with a first end face, the first end face is used for being coordinated with an oil distribution disc, and the alloy plate is arranged on the first end face;
the cylinder body is made of a steel base material, and the first sleeve and the alloy plate are made of a copper base material;
the rotor also comprises a second sleeve, the rigidity of the material of the cylinder body is greater than that of the second sleeve,
the cylinder body is provided with at least one first cavity and an opening positioned on a second end face, and the opening is communicated with the first cavity;
the first cavity comprises a first cavity section and a second cavity section deviating from the first end face, the second cavity section is internally provided with the second sleeve, and the second sleeve is provided with a second cavity for the plunger to pass through;
the diameter of the second cavity is smaller than that of the first cavity section;
the diameter of the first cavity section is smaller than the diameter of the second cavity section;
the length of the second sleeve along the axial direction is L1, and L0 is larger than L1 and smaller than L0+0.5d; wherein,
l0 is the minimum contact length of the plunger and the second sleeve when the plunger extends out of the first cavity for the maximum stroke;
d is the diameter of the plunger.
2. The rotor of claim 1, wherein the first sleeve, the second sleeve, and the alloy plate are made of a material having a density greater than a density of a material of the cylinder;
the second sleeve is made of a copper-based material or an aluminum-based material.
3. The rotor as claimed in claim 2, wherein the first sleeve, the second sleeve and the alloy plate have bonding layers between the respective block connection portions, and the materials of the bonding layers include a steel-based material and a copper-based material, or the materials of the bonding layers include a steel-based material and an aluminum-based material.
4. The rotor of claim 1 wherein said plunger has a minimum spacing from the bottom of said first cavity when said plunger has a minimum travel into said first cavity, said minimum spacing being 0.1d-0.3d.
5. A rotor assembly comprising a rotor according to any one of claims 1 to 4, the rotor assembly further comprising an oil distribution pan, an outer support bearing and a plunger,
the oil distribution disc is arranged on a first end face of the cylinder body, the outer support bearing is sleeved on an outer support face of the cylinder body, and the plunger is matched with a first cavity of the cylinder body.
6. A plunger apparatus comprising a rotor assembly as claimed in claim 5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210007299.8A CN114017276B (en) | 2022-01-06 | 2022-01-06 | Rotor, rotor subassembly and plunger equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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| CN211397784U (en) * | 2019-12-25 | 2020-09-01 | 良匠(苏州)机械设备有限公司 | Ultrahigh pressure hydraulic pump with high volumetric efficiency and large flow |
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| AU6216873A (en) * | 1973-03-05 | 1975-05-08 | Deere & Co | Axial piston pumps amd motors |
| DE102012006289A1 (en) * | 2012-03-29 | 2013-10-02 | Robert Bosch Gmbh | Hydrostatic axial piston machine |
| CN204371574U (en) * | 2014-12-08 | 2015-06-03 | 启东高压油泵有限公司 | A kind of high speed axial piston pump |
| CN106801672A (en) * | 2015-11-26 | 2017-06-06 | 赵鹏远 | A kind of cylinder body handling axle sleeve of axial plunger pump |
| CN210799244U (en) * | 2019-07-30 | 2020-06-19 | 山东兰徳液压精工有限公司 | Novel high-pressure plunger pump |
| CN113464420A (en) * | 2021-08-11 | 2021-10-01 | 合肥波林新材料股份有限公司 | Plunger pump cylinder body structure and assembling method thereof |
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| CN211397784U (en) * | 2019-12-25 | 2020-09-01 | 良匠(苏州)机械设备有限公司 | Ultrahigh pressure hydraulic pump with high volumetric efficiency and large flow |
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