CN215333224U - Hollow shaft radial plunger type hydraulic motor - Google Patents
Hollow shaft radial plunger type hydraulic motor Download PDFInfo
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- CN215333224U CN215333224U CN202121796960.5U CN202121796960U CN215333224U CN 215333224 U CN215333224 U CN 215333224U CN 202121796960 U CN202121796960 U CN 202121796960U CN 215333224 U CN215333224 U CN 215333224U
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Abstract
The utility model provides a hollow shaft radial plunger type hydraulic motor, which relates to hydraulic power equipment and comprises a shell and a radial plunger rail, wherein a radial plunger main shaft assembly is arranged in the shell and comprises a hollow main shaft, the hollow main shaft is arranged in the shell, a protruding part is annularly arranged on the hollow main shaft and is in interference fit with the hollow main shaft, a plurality of first oil channels are arranged on the side surface of the protruding part, the protruding part is provided with a radial groove, an oil cylinder is arranged on the protruding part in the radial direction and comprises a piston arranged in the radial groove, the lower end of the piston is provided with an anti-rotation plug, and the anti-rotation plug is internally provided with a rotating plugThe plunger is fixed in the accommodating space through a rotating shaft and is parallel to the hollow main shaft; the liquid in the over-closed oil circuit generates acting force on the plunger, the plunger is in contact with the radial plunger track, and the reaction force generated by the radial plunger track on the plunger can be decomposed into tangential force F1And normal force F2Wherein the tangential force F1The hollow main shaft is pushed to rotate and outputs torque and rotating speed outwards.
Description
Technical Field
The utility model relates to hydraulic power equipment, in particular to a hollow shaft radial plunger type hydraulic motor.
Background
The conventional hydraulic motors at present comprise axial plunger type, radial plunger type, vane type, gear hydraulic motor and other structural forms. None of these hydraulic motors is of a hollow shaft construction and the nature of the cable drum requires that there must be a hollow shaft through the cable and that the shaft be able to provide torque to its reel to rotate it in order to wind and unwind the cable. With the rapid development of the industries such as engineering machinery, ports, shipping, energy and the like, the cable drum with large torque and low rotating speed is more and more widely applied, and in order to achieve the large torque and the low rotating speed, a non-high-power motor and a speed reducer do not provide power for the cable drum in the traditional method, and the installation of the large-size high-power motor and the speed reducer enables the cable drum structure to be large, but the installation space of the cable drum is limited in many occasions.
SUMMERY OF THE UTILITY MODEL
The utility model provides a hollow shaft radial plunger type hydraulic motor, and aims to solve the problems of large structure and limited installation of the conventional hydraulic Mar method.
In order to achieve the above object, an embodiment of the present invention provides a hollow shaft radial plunger type hydraulic motor, including:
the oil inlet and the oil outlet are arranged in the right cavity;
the radial plunger track is clamped between the left cavity and the right cavity, and the left cavity, the radial plunger track and the right cavity are sealed to form a shell;
the radial plunger spindle assembly comprises a hollow spindle, the hollow spindle is arranged in a shell, a protruding part is arranged at the middle part of the hollow spindle in a surrounding mode, the protruding part is in interference fit with the hollow spindle, a plurality of first oil ducts are arranged on the side face of the protruding part, a radial groove is formed in the protruding part in the radial direction and is communicated with the first oil ducts, a plurality of oil cylinders are arranged on the protruding part in the radial direction, each oil cylinder comprises a piston arranged in the corresponding radial groove, an anti-rotation plug is arranged at the lower end of each piston, an accommodating space for accommodating a plunger is formed in the corresponding anti-rotation plug, the plunger is fixed in the accommodating space through a rotating shaft, and the plunger is parallel to the hollow spindle;
the oil inlet, the first oil duct and the oil outlet are communicated to form a closed oil path.
Preferably, a rotating fixed elastic sheet for limiting the anti-rotation plug is arranged in the radial groove, one end of the fixed elastic sheet is clamped with the anti-rotation plug, and the other end of the fixed elastic sheet is detachably connected with the protruding piece.
Preferably, a rotational flow rotor is further arranged on the hollow main shaft in a surrounding mode, the hollow main shaft is in clearance fit with the rotational flow rotor, the rotational flow rotor is fixed in the right cavity, a plurality of second oil ducts are arranged in the direction, parallel to the hollow main shaft, of the rotational flow rotor, the number of the second oil ducts is larger than that of the first oil ducts, the second oil ducts are intermittently communicated with the first oil ducts when the protruding parts rotate, and the oil inlet, the first oil ducts, the second oil ducts and the oil outlet are communicated to form a closed oil path.
Preferably, a spring is further arranged between the rotational flow rotor and the right cavity, and the spring generates acting force for enabling the rotational flow rotor to be close to the protruding piece.
Preferably, the right cavity is provided with a plurality of limiting clamping grooves which are centrosymmetric about the hollow main shaft, and the spring is arranged in the limiting clamping grooves.
Preferably, the left cavity and the right cavity are respectively internally provided with a bearing for supporting the hollow spindle, and two ends of the hollow spindle respectively extend out of the left cavity and the right cavity.
The above-mentioned aspects of the present invention are as followsHas the beneficial effects that: acting force is generated on the plunger through liquid in the closed oil circuit, the plunger is in contact with the radial plunger track, and the reaction force generated on the plunger by the radial plunger track can be decomposed into tangential force F1And normal force F2Wherein the tangential force F1The hollow main shaft is pushed to rotate and outputs torque and rotating speed outwards.
Drawings
FIG. 1 is a cross-sectional view of the present invention;
FIG. 2 is a schematic view of the left chamber of the present invention;
FIG. 3 is a half sectional view of a radial piston spindle assembly;
FIG. 4 is a front view of a cyclone rotor;
FIG. 5 is a sectional view taken along line A-A of FIG. 4;
FIG. 6 is a force diagram of the radial plunger track and plunger.
[ description of reference ]
1-left cavity, 2-right cavity, 21-oil inlet, 22-oil outlet, 23-oil drain port, 3-radial plunger track, 4-radial plunger spindle assembly, 41-hollow spindle, 42-bulge, 43-first oil duct, 44-radial groove, 45-oil cylinder, 451-piston, 452-anti-rotation plug, 453-plunger, 456-fixed elastic sheet, 46-rotational flow rotor, 461-second oil duct, 462-spring, 463-limit clamping groove, 5-bearing, 6-oil seal and 7-rotary sealing ring.
Detailed Description
In order to make the technical problems, technical solutions and advantages of the present invention more apparent, the following detailed description is given with reference to the accompanying drawings and specific embodiments.
As shown in fig. 1-6, an embodiment of the present invention provides a hollow shaft radial plunger type hydraulic motor, which includes a left cavity 1 and a right cavity 2, a radial plunger rail 3 is disposed between the left cavity 1 and the right cavity 2, the left cavity 1, the right cavity 2 and the radial plunger rail 3 are hermetically connected to form a housing, and a radial plunger spindle assembly 4 is disposed therein. An oil inlet 21, an oil outlet 22 and an oil drainage port 23 are arranged on the right cavity 2.
The radial plunger spindle assembly 4 comprises a hollow spindle 41, the hollow spindle 41 is disposed inside the housing, two ends of the hollow spindle 41 are fixedly mounted in the left cavity 1 and the right cavity 2 through bearings 5, and two ends of the hollow spindle 41 respectively extend out of the left cavity 1 and the right cavity 2 for transmission, such as connection with a transition disc of a cable drum. The two ends of the hollow main shaft 41 are also provided with oil seals 6 and rotary sealing rings 7 to ensure that a sealed cavity is formed in the shell.
A protruding part 42 is annularly arranged on the outer edge of the hollow main shaft 41, preferably, the protruding part 42 is arranged in the middle of the hollow main shaft 41, the protruding part 42 is in interference fit with the hollow main shaft 41, and a plurality of first oil channels 43 are arranged on the side surface of the protruding part 42. A radial groove 44 is provided in the radial direction of the boss member 42, and the radial groove 44 communicates with the first oil passage 43. An oil cylinder 45 is also arranged in the radial groove 44, and under the action of flowing liquid, the oil cylinder 45 extends out of the oil cylinder 45 and is abutted with the inner wall of the radial plunger track 3 to generate acting force for driving the hollow main shaft 41 to rotate.
Specifically, the cylinder 45 includes a piston 451, the piston 451 is radially disposed in the radial groove 44, a rotation preventing plug 452 is disposed at a lower end of the piston 451, and the rotation preventing plug 452 is disposed on the piston 451. In order to realize the function of the anti-rotation plug 452, a fixing elastic sheet 456 is arranged in the radial groove 44, one end of the fixing elastic sheet 456 is clamped with the anti-rotation plug 452, and the other end of the fixing elastic sheet 456 is detachably connected with the protruding piece 42. Preferably, the protrusion 42 is provided with a groove for accommodating the fixing spring 456, so as to prevent the spring from protruding out of the surface of the protrusion 42 too much to affect the rotation of the hollow spindle 41. A receiving space for receiving the plunger 453 is provided in the anti-rotation plug 452, the receiving space being used to mount the plunger 453 parallel to the hollow shaft 41, the plunger 453 being freely rotatable in the receiving space.
The aforementioned oil inlet 21, first oil passage 43, and oil outlet 22 communicate to form a closed circuit. When the liquid flows in the closed circuit, the oil cylinder 45 generates a force acting on the radial plunger rail 3 downward by being pressed by the liquid through the first oil passage 43, and the radial plunger rail 3 and the plunger 453 generate a reaction force F as shown in fig. 6 due to the wavy inner wall in the radial plunger rail 3, and the reaction force F is decomposed into a normal force F on the inner wall of the radial plunger rail 32And tangential force F1Tangential force F1Generating torque to the oil cylinder 45, and further pushing the hollow main shaft 41 to output torque and rotating speed outwards. Preferably, a plurality of oil cylinders 45 and radial grooves 44 are provided, wherein the oil cylinders 45 correspond to the radial grooves 44 one by one, and the radial grooves 44 are arranged in an annular array with respect to the hollow main shaft 41.
Further, a rotational flow rotor 46 is further annularly arranged on the hollow main shaft 41, the rotational flow rotor 46 is in clearance fit with the hollow main shaft 41, the rotational flow rotor 46 is fixed in the right chamber, the rotational flow rotor 46 is provided with a plurality of second oil passages 461 in the horizontal direction, the number of the second oil passages 461 is larger than that of the first oil passages 43, and the plurality of second oil passages 461 are similarly arranged in an annular array relative to the hollow main shaft 41. When the radial piston main shaft assembly 4 rotates, the second oil passage 461 is intermittently communicated with the first oil passage 43, and therefore, the closed oil passage should also include the second oil passage 461.
When the liquid flows from the second oil passage 461 to the first oil passage 43, it is necessary to ensure that there is no leakage between the first oil passage 43 and the second oil passage 461, and therefore a spring 462 is provided between the cyclone rotor 46 and the right chamber 2, the spring 462 generating a force of the cyclone rotor 46 approaching the protrusion 42. Specifically, be provided with spacing draw-in groove 463 in having the cavity, a plurality of spacing draw-in groove 463 is central symmetry about hollow spindle 41, and spring 462 is provided with during spacing draw-in groove 463, avoids the dislocation to break away from.
The utility model has the following advantages:
1. the unique design of the hollow main shaft 41 ensures that the equipment has compact structure, greatly reduces the occupied installation space compared with the combination of a motor, a speed reducer, chain transmission or gear transmission, and fundamentally solves the problem of limited space of a cable drum or other working mechanisms connected with the equipment.
2. The output torque is large, and the hydraulic device is provided with a plurality of plungers 453 and oil cylinders 45, so that the oil cylinders 45 are rotated by the torque generated on the plungers 453 and the torque is output, and the output torque can reach thousands of Nm, thereby meeting the requirement of large torque required by a cable reel or other working mechanisms connected with the hydraulic device.
3. The output rotating speed is low, the application belongs to a low-speed hydraulic hollow shaft radial plunger type hydraulic motor, the displacement is large, the rotating speed is low, the radial plunger type hydraulic motor can be directly connected with a cable drum or other working mechanisms, a speed reducing device is not needed, and even a main shaft required by the cable drum is replaced, so that a transmission mechanism is greatly simplified, and the radial plunger type hydraulic motor is convenient to install and maintain.
4. The torque and the rotating speed are adjustable, the output torque is determined by the pressure difference of the oil inlet 22 and the oil outlet 22, and the larger the pressure difference is, the larger the torque is; the output rotating speed is determined by the flow, and when the oil pipe diameter is fixed, the larger the flow is, the higher the rotating speed is, the higher the normal force is, and therefore the requirements of the cable drum on required torque and adjustable rotating speed are met.
While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the utility model as defined in the appended claims.
Claims (6)
1. A hollow shaft radial plunger type hydraulic motor is characterized in that: the method comprises the following steps:
the oil-water separator comprises a left cavity (1) and a right cavity (2), wherein the right cavity (2) is provided with an oil inlet (21) and an oil outlet (22);
the radial plunger track (3) is clamped between the left cavity (1) and the right cavity (2), and the left cavity (1), the radial plunger track (3) and the right cavity (2) are sealed to form a shell;
the radial plunger spindle assembly (4) is arranged in a shell and comprises a hollow spindle (41), the hollow spindle (41) is arranged in the shell, a protruding piece (42) is arranged at the middle part of the hollow spindle (41) in a surrounding mode, the protruding piece (42) is in interference fit with the hollow spindle (41), a plurality of first oil channels (43) are arranged on the side face of the protruding piece (42), a radial groove (44) is arranged on the protruding piece (42) in the radial direction, the radial groove (44) is communicated with the first oil channels (43), a plurality of oil cylinders (45) are arranged on the protruding piece (42) in the radial direction, each oil cylinder (45) comprises a piston (451) arranged in the radial groove (44), an anti-rotation plug (452) is arranged at the lower end of each piston (451), an accommodating space for accommodating a plunger (453) is arranged in each anti-rotation plug (452), and each plunger (453) is fixed in the accommodating space through a rotating shaft, the plunger (453) is parallel to the hollow main shaft (41);
the oil inlet (21), the first oil channel (43) and the oil outlet (22) are communicated to form a closed oil path.
2. The hollow shaft radial plunger hydraulic motor of claim 1, wherein: and a fixed elastic sheet (456) used for limiting the rotation of the anti-rotation plug (452) is arranged in the radial groove (44), one end of the fixed elastic sheet (456) is clamped with the anti-rotation plug (452), and the other end of the fixed elastic sheet is detachably connected with the protruding piece (42).
3. The hollow shaft radial plunger hydraulic motor of claim 2, wherein: the hollow main shaft (41) is further annularly provided with a rotational flow rotor (46), the hollow main shaft (41) is in clearance fit with the rotational flow rotor (46), the rotational flow rotor (46) is fixed in the right cavity (2), the rotational flow rotor (46) is provided with a plurality of second oil ducts (461) in the direction parallel to the hollow main shaft (41), the number of the second oil ducts (461) is larger than that of the first oil ducts (43), the second oil ducts (461) are intermittently communicated with the first oil ducts (43) when the protruding piece (42) rotates, and the oil inlet (21), the first oil duct (43), the second oil ducts (461) and the oil outlet (22) are communicated to form a closed oil path.
4. The hollow shaft radial plunger hydraulic motor of claim 3, wherein: and a spring (462) is also arranged between the rotational flow rotor (46) and the right cavity (2), and the spring (462) generates acting force for enabling the rotational flow rotor (46) to be close to the protruding piece (42).
5. The hollow shaft radial plunger hydraulic motor of claim 4, wherein: the right cavity (2) is provided with a limiting clamping groove (463), the limiting clamping grooves (463) are centrosymmetric about the hollow main shaft (41), and the spring (462) is arranged in the limiting clamping groove (463).
6. The hollow shaft radial plunger hydraulic motor of claim 1, wherein: the bearing (5) is arranged in the left cavity (1) and the right cavity (2) respectively and used for bearing the hollow main shaft (41), and two ends of the hollow main shaft (41) extend out of the left cavity (1) and the right cavity (2) respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121796960.5U CN215333224U (en) | 2021-08-03 | 2021-08-03 | Hollow shaft radial plunger type hydraulic motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121796960.5U CN215333224U (en) | 2021-08-03 | 2021-08-03 | Hollow shaft radial plunger type hydraulic motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215333224U true CN215333224U (en) | 2021-12-28 |
Family
ID=79575273
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121796960.5U Active CN215333224U (en) | 2021-08-03 | 2021-08-03 | Hollow shaft radial plunger type hydraulic motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215333224U (en) |
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2021
- 2021-08-03 CN CN202121796960.5U patent/CN215333224U/en active Active
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