CN114161767A - Multi-cylinder grading pressurization method of hydraulic machine - Google Patents
Multi-cylinder grading pressurization method of hydraulic machine Download PDFInfo
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
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Abstract
The invention provides a multi-cylinder grading pressurization method of a hydraulic machine, which comprises the following steps: acquiring a pressurization setting parameter of the hydraulic machine; determining a pressurization set value of the system working pressure of a pressurization hydraulic cylinder combination and the pressurization hydraulic cylinder combination in a hydraulic cylinder structure of the hydraulic machine according to the pressurization set parameter; and controlling the pressurizing hydraulic cylinder combination to perform pressurizing operation when the system working pressure is the pressurizing set value. According to the invention, the proper combination of the pressurizing hydraulic cylinders and the proper system working pressure are selected before the pressurizing operation to pressurize the workpiece, so that the stability and reliability of the hydraulic press in the pressurizing operation process are improved; and through the cooperation of different pressurizing hydraulic cylinder combinations and different system working pressures, the pressurizing mode of the hydraulic machine is enriched, the adjusting range of the pressurizing pressure of the hydraulic machine is expanded, the application range of the hydraulic machine is widened, the stepped adjustment of the pressurizing pressure of the hydraulic machine is convenient to realize, and the operation difficulty of the hydraulic machine is reduced.
Description
Technical Field
The invention relates to the technical field of hydraulic machines, in particular to a multi-cylinder grading pressurization method of a hydraulic machine.
Background
At present, the large hydraulic machine generally adopts the change of the system working pressure of a hydraulic cylinder to adjust the pressurizing pressure of the hydraulic machine, which has higher requirements on the performance of the hydraulic cylinder and a pipeline thereof, and causes the adjusting range of the pressurizing pressure of the hydraulic machine to be smaller, thereby limiting the application range and the scene of the hydraulic machine.
Disclosure of Invention
The invention solves the problems that: how to realize the stepped pressurization of the hydraulic machine and enlarge the regulation range of the pressurization pressure of the hydraulic machine.
In order to solve the problems, the invention provides a multi-cylinder grading pressurization method of a hydraulic machine, which comprises the following steps:
acquiring a pressurization setting parameter of the hydraulic machine;
determining a pressurization set value of the system working pressure of a pressurization hydraulic cylinder combination and the pressurization hydraulic cylinder combination in a hydraulic cylinder structure of the hydraulic machine according to the pressurization set parameter;
and controlling the pressurizing hydraulic cylinder combination to perform pressurizing operation when the system working pressure is the pressurizing set value.
Optionally, the hydraulic cylinder structure comprises a main hydraulic cylinder and a leveling cylinder vertically arranged between an upper support beam and a movable cross beam of the hydraulic machine; the pressurizing hydraulic cylinder combination is provided with a plurality of groups, and each group of pressurizing hydraulic cylinder combination is composed of the main hydraulic cylinder or composed of the main hydraulic cylinder and the leveling cylinder; and determining a pressurized hydraulic cylinder combination in the hydraulic cylinder structure of the hydraulic machine to determine a group of pressurized hydraulic cylinder combinations.
Optionally, a plurality of the master cylinder arrays are distributed between the upper support beam and the movable cross beam.
Optionally, four leveling cylinders are arranged, and the four leveling cylinders are distributed between the upper support beam and the movable cross beam in an array manner; and the master hydraulic cylinders are positioned in an area surrounded by the four leveling cylinders.
Optionally, in a group of the pressurized hydraulic cylinder combinations composed of the master cylinders, an even number of the master cylinders are provided and are symmetrically distributed.
Optionally, in a group of the pressurized hydraulic cylinder combinations composed of the master hydraulic cylinder and the leveling cylinders, an even number of the master hydraulic cylinders are symmetrically distributed, and four leveling cylinders are provided.
Optionally, the pressurization set value includes a first preset value and a second preset value, and a second thrust of the hydraulic cylinder when the system working pressure is the second preset value is greater than a first thrust of the hydraulic cylinder when the system working pressure is the first preset value.
Optionally, the magnitude of the second thrust is an integer multiple of the first thrust.
Optionally, the master cylinder and the leveling cylinder are both plunger cylinders.
Optionally, the movable cross beam comprises a main beam and guide beams arranged at two ends of the main beam, a plunger of the main hydraulic cylinder is connected with the main beam, and a plunger of the leveling cylinder is connected with the guide beams.
Compared with the prior art, the invention has the following beneficial effects: the proper combination of the pressurizing hydraulic cylinders and the system working pressure of the proper pressurizing set value are selected before pressurizing operation, so that the workpiece is pressurized at a certain pressure, and the stability and the reliability of the hydraulic machine in the pressurizing operation process are improved. And through the cooperation of different pressurizing hydraulic cylinder combinations and different system working pressures, the pressurizing mode of the hydraulic machine is enriched, the adjusting range of the pressurizing pressure of the hydraulic machine is expanded, the application range of the hydraulic machine is widened, the stepped adjustment of the pressurizing pressure of the hydraulic machine is convenient to realize, and the operation difficulty of the hydraulic machine is reduced.
Drawings
FIG. 1 is a flow chart of a multi-cylinder staged pressurization method for a hydraulic machine in an embodiment of the present invention;
FIG. 2 is a partial structural schematic diagram of a hydraulic machine in an embodiment of the invention, showing the structures of a master cylinder and the like;
FIG. 3 is a partial structural schematic view of the hydraulic machine in the embodiment of the invention, showing the upper support beam and the like;
FIG. 4 is a schematic diagram of the distribution of master cylinders according to an embodiment of the present invention.
Description of reference numerals:
1-upper support beam; 2-movable beam, 21-main beam, 22-guide beam; 3-hydraulic cylinder structure, 31-main hydraulic cylinder, 32-leveling cylinder, 4-cylinder bottom beam and 5-fuselage frame.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.
In the coordinate system XYZ provided herein, the X axis represents forward, the X axis represents backward, the Y axis represents forward, the Y axis represents rightward, the Z axis represents forward, and the Z axis represents backward. Also, it is noted that the terms "first," "second," and the like in the description and claims of the present invention and in the above-described drawings are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or described herein.
Referring to fig. 1 to 4, an embodiment of the present invention provides a multi-cylinder stepped pressurizing method for a hydraulic machine, including the following steps:
s100, acquiring a pressurization setting parameter of the hydraulic machine;
s200, determining a pressurization set value of the system working pressure of a pressurization hydraulic cylinder combination and a pressurization hydraulic cylinder combination in a hydraulic cylinder structure 3 of the hydraulic machine according to the pressurization set parameter;
and step S300, controlling the pressurizing hydraulic cylinder combination to perform pressurizing operation when the system working pressure is a pressurizing set value.
The multi-cylinder stepped pressurizing method of the hydraulic machine in the embodiment is used for realizing stepped pressurizing of the multi-cylinder hydraulic machine, so that the pressure of the hydraulic machine on a workpiece is adjustable and easy to adjust. When the hydraulic press is required to pressurize the workpiece at a certain pressure, the pressurizing setting parameters of the hydraulic press, that is, the pressure value parameters required to pressurize the workpiece, are obtained in step S100. Then, in step S200, a suitable combination of the pressurizing hydraulic cylinders and a suitable pressurizing set value are selected according to the acquired pressure value parameter that is required to pressurize the workpiece. Finally, in step S300, the pressurizing hydraulic cylinder combination is controlled to perform the pressurizing operation when the system operating pressure is the set pressurizing value.
Therefore, the proper combination of the pressurizing hydraulic cylinders and the system working pressure of the proper pressurizing set value are selected before pressurizing operation, so that the workpiece is pressurized at a certain pressure, and the stability and the reliability of the hydraulic machine in the pressurizing operation process are improved. And through the cooperation of different pressurizing hydraulic cylinder combinations and different system working pressures, the pressurizing mode of the hydraulic machine is enriched, the adjusting range of the pressurizing pressure of the hydraulic machine is expanded, the application range of the hydraulic machine is widened, the stepped adjustment of the pressurizing pressure of the hydraulic machine is convenient to realize, and the operation difficulty of the hydraulic machine is reduced.
Alternatively, as shown in fig. 2 and 3, the hydraulic cylinder structure 3 includes a main hydraulic cylinder 31 and a leveling cylinder 32 vertically disposed between the upper support beam 1 and the movable cross beam 2 of the hydraulic machine; the pressurizing hydraulic cylinder combination is provided with a plurality of groups, and each group of pressurizing hydraulic cylinder combination is composed of a main hydraulic cylinder 31 or composed of the main hydraulic cylinder 31 and a leveling cylinder 32; the combination of the pressurized hydraulic cylinders in the hydraulic cylinder structure 3 of the hydraulic machine is determined to be a group of pressurized hydraulic cylinder combinations.
In this embodiment, the master cylinder 31 and the leveling cylinder 32 of the hydraulic cylinder structure 3 are both vertically disposed between the upper support beam 1 and the movable beam 2 to be adapted to the movable beam 2 adapted to move in the vertical direction (i.e., the Z-axis direction in fig. 2), so that the master cylinder 31 stably and effectively drives the movable beam 2 and the leveling cylinder 32 to level the movable beam 2. Specifically, the main hydraulic cylinder 31 is arranged at the upper end of the movable cross beam 2 and is positioned between the body frame 5 and the movable cross beam 2 of the hydraulic machine; the leveling cylinder 32 is provided at the upper end of the movable cross member 2 between the upper support beam 1 and the movable cross member 2. In step S200, the hydraulic machine may determine a set of suitable combinations of the pressurizing hydraulic cylinders according to the pressure required by the workpiece, and then determine the pressurizing set value of the system working pressure according to the determined combinations of the pressurizing hydraulic cylinders; or the pressurizing set value of the system working pressure is determined according to the pressure required by the workpiece, and then the pressurizing hydraulic cylinder combination is determined according to the determined pressurizing set value. Wherein, the pressurizing hydraulic cylinder combination is only composed of the master hydraulic cylinder 31, or is composed of the master hydraulic cylinder 31 and the leveling cylinder 32 together; when the pressurized hydraulic cylinder combination is composed of only the master hydraulic cylinder 31, one group of pressurized hydraulic cylinder combination may be composed of a part of the master hydraulic cylinder 31 or may be composed of all the master hydraulic cylinders 31; when the combination of the master cylinder 31 and the leveling cylinder 32 is a set of combination of the master cylinder 31 and the leveling cylinder 32, the combination of the master cylinder 31 and the leveling cylinder 32 may be a set of combination of the master cylinder 31 and the leveling cylinder 32, or a set of combination of the master cylinder 31 and the leveling cylinder 32.
Alternatively, as shown in fig. 2 and 3, a plurality of master cylinders 31 are distributed in an array between the upper support beam 1 and the movable cross beam 2.
In this embodiment, the plurality of master cylinders 31 are distributed between the upper support beam 1 and the movable beam 2 in an array, that is, the plurality of master cylinders 31 are spaced at certain intervals in the X-axis direction and the Y-axis direction in fig. 2, so that the master cylinders 31 have various combinations of symmetrical distribution to be distributed symmetrically, and the movable beam 2 can be uniformly stressed, thereby ensuring stable operation of the hydraulic machine.
Optionally, the hydraulic cylinder structure 3 further comprises a cylinder bottom beam 4 arranged between the upper support beam 1 and the main hydraulic cylinder 31, specifically, the cylinder bottom beam 4 is positioned at the upper end of the main hydraulic cylinder 31 and is positioned between the body frame 5 of the hydraulic machine and the main hydraulic cylinder 31; the cylinder bottom beam 4 is used for connecting the master cylinder 31 and the body frame 5, and serves as a transition pad beam between the master cylinder 31 and the body frame 5.
Alternatively, as shown in fig. 2 and 3, four leveling cylinders 32 are provided, and four leveling cylinders 32 are distributed between the upper support beam 1 and the movable cross beam 2 in an array; a plurality of master cylinders 31 are located in an area surrounded by four leveling cylinders 32.
Four leveling cylinders 32 are distributed in an array between the upper support beam 1 and the movable cross beam 2, and all the main hydraulic cylinders 31 are positioned in an area surrounded by the four leveling cylinders 32. Therefore, the mutual interference between the main hydraulic cylinder 31 and the main hydraulic cylinder 31 is avoided, and the attractiveness and the stability of the overall structure of the hydraulic press are improved.
Alternatively, in a group of pressurized hydraulic cylinder combinations composed of the master cylinders 31, the master cylinders 31 are provided in an even number and are symmetrically distributed.
In this embodiment, the even number of the main hydraulic cylinders 31 in the pressurizing hydraulic cylinder combination are symmetrically distributed to ensure that the movable cross beam 2 can be uniformly stressed, thereby ensuring the stable operation of the hydraulic machine.
Alternatively, in a set of pressurized hydraulic cylinder combinations composed of the master cylinders 31 and the leveling cylinders 32, an even number of the master cylinders 31 are provided and symmetrically distributed, and four leveling cylinders 32 are provided.
In this embodiment, the even number of the main hydraulic cylinders 31 in the pressurizing hydraulic cylinder combination are symmetrically distributed to ensure that the movable cross beam 2 can be uniformly stressed, thereby ensuring the stable operation of the hydraulic machine; and four leveling cylinders 32 in the pressurizing hydraulic cylinder combination are arranged, so that the movable cross beam 2 can be uniformly stressed, and the stability of the movable cross beam 2 in the up-and-down movement process is further improved.
Optionally, the pressurization set value includes a first preset value and a second preset value, and the second thrust of the hydraulic cylinder when the system working pressure is the second preset value is greater than the first thrust of the hydraulic cylinder when the system working pressure is the first preset value.
In order to improve the convenience of the operation of the hydraulic machine, the pressurization set value of the working pressure of the hydraulic machine system is provided with at least two preset values. In this embodiment, the second thrust of the hydraulic cylinder when the system operating pressure is the second preset value is greater than the first thrust of the hydraulic cylinder when the system operating pressure is the first preset value. So, through first default, second default respectively with the cooperation of the pressurization pneumatic cylinder combination of different groups, be convenient for realize the stepped control of hydraulic press pressurization pressure, and make the pressurized pressure of hydraulic press easily adjust, richened the pressurization mode of hydraulic press, promoted the application scope of hydraulic press.
Alternatively, the system operating pressure of the hydraulic machine may be regulated by a relief valve.
Optionally, the magnitude of the second thrust is an integer multiple of the first thrust.
The second thrust corresponding to the second preset value is an integer multiple, e.g., two, three, four, etc., of the first thrust corresponding to the first preset value. Therefore, the pressure of the hydraulic machine on the workpiece is easy to set and calculate, the pressure of the hydraulic machine on the workpiece has a large adjusting range, the stepped adjustment of the pressurizing pressure of the hydraulic machine is realized, the pressurizing modes of the hydraulic machine are further enriched, and the application range of the hydraulic machine is widened.
In some embodiments, the diameter of the plunger of a single cylinder of the master cylinder 31 is less than 1500mm, which reduces the manufacturing difficulty and sealing requirement of the master cylinder 31. Sixteen master cylinders 31 are arranged, and the sixteen master cylinders 31 are arranged in a 4 x 4 matrix structure; the four leveling cylinders 32 are arranged in a 2 x 2 matrix configuration. The system working pressure of the hydraulic cylinder structure 3 (the main hydraulic cylinder 31 and the leveling cylinder 32) is divided into two stages, one stage (a first preset value) is 30MPa, and the output of the corresponding hydraulic cylinder (the main hydraulic cylinder 31 or the leveling cylinder 32) is 50 MN; the second level (second preset value) is 60MPa, and the corresponding hydraulic cylinder output is 100 MN. For example: when the pressurization set value is 30MPa, the output of the four hydraulic cylinders is 4 multiplied by 50 which is 200MN (namely 20000 tons); when the pressurization set value is 60MPa, the four-cylinder force is 4 × 100 — 400MN (i.e., 40000 tons). That is, when the set value of pressurization is constant, the output force of the combination of pressurized hydraulic cylinders is in direct proportion to the number of hydraulic cylinders in the combination of pressurized hydraulic cylinders (where the master cylinder 31 is the same specification as the leveling cylinder 32). For the sake of understanding, the following examples are further described; in order to ensure the uniformity of the load borne by the machine body, the hydraulic cylinders (the main hydraulic cylinder 31 and the leveling cylinder 32) are selected based on the principle of symmetrical distribution. And each hydraulic cylinder has an independent oil inlet and can be independently controlled. The multiple pressure grading schemes are realized by matching the number of the cylinders with the working pressure of the system (namely, by matching different combinations of the pressurizing hydraulic cylinders with different working pressures of the system). Referring to fig. 4, sixteen master cylinders 31 are denoted as a, b, c, d, e, f, g, h, i, j, k, l, m, n, o, and p, respectively. The cylinders f, g, j and k which are symmetrically distributed front and back and left and right are taken as a group of pressurizing hydraulic cylinder combination, and the output requirements of 2 ten thousand tons and 4 ten thousand tons can be realized through working pressure classification (the working pressure of the system is selected to be a first preset value or a second preset value). The cylinders e, f, g, h, i, j, k and l which are symmetrically distributed front and back and left and right are taken as a group of pressurizing hydraulic cylinders for combination, and the output requirements of 4 ten thousand tons and 8 ten thousand tons can be realized through working pressure classification. The cylinders b, c, f, g, j, k, n and o which are symmetrically distributed front and back and left and right are taken as a group of pressurizing hydraulic cylinders to be combined, and the output requirements of 4 ten thousand tons and 8 ten thousand tons can be realized through working pressure classification. The cylinders b, c, e, f, g, h, i, j, k, l, n and o which are symmetrically distributed front and back and left and right are taken as a group of pressurizing hydraulic cylinders for combination, are symmetrically distributed front and back and left and right, and can meet the output requirements of 6 ten thousand tons and 12 ten thousand tons through working pressure classification. Sixteen main hydraulic cylinders 31 which are symmetrically distributed front and back and left and right are taken as a group of pressurizing hydraulic cylinder combination, and the output requirements of 8 ten thousand tons and 16 ten thousand tons can be realized through working pressure classification. On the basis, when the pressurizing hydraulic cylinder combination is composed of the main hydraulic cylinder 31 and the leveling cylinders 32, the four leveling cylinders 32 act together, and the output of 2 ten thousand tons can be increased when the working pressure of the system selects a first preset value; and when the working pressure of the system selects a second preset value, the output of 4 ten thousand tons is increased. Therefore, the pressurizing modes of the hydraulic machine are enriched by matching different pressurizing hydraulic cylinder combinations with different system working pressures, the adjusting range of the pressurizing pressure of the hydraulic machine is expanded, the application range of the hydraulic machine is widened, the stepped adjustment of the pressurizing pressure of the hydraulic machine is convenient to realize, and the operation difficulty of the hydraulic machine is reduced.
It should be noted that the number and value of the pressurization set values and the number of the hydraulic cylinders are set only for illustrating the technical solution of the present invention, and are not limited.
Alternatively, both the master cylinder 31 and the leveling cylinder 32 are plunger cylinders.
In this embodiment, the master cylinder 31 and the leveling cylinder 32 both adopt plunger cylinders, so as to reduce the difficulty of structural design, manufacturing and sealing of the master cylinder 31 and the leveling cylinder 32, and improve the convenience of post-maintenance of the master cylinder 31 and the leveling cylinder 32.
Alternatively, as shown in fig. 2 and 3, the movable cross beam 2 includes a main beam 21 and guide beams 22 disposed at both ends of the main beam 21, the plunger of the master cylinder 31 is connected to the main beam 21, and the plunger of the leveling cylinder 32 is connected to the guide beams 22.
In this embodiment, the movable cross beam 2 includes a main beam 21 and guide beams 22 disposed at two ends of the main beam 21, that is, the movable cross beam 2 is a split structure; therefore, the difficulty and the cost of production, manufacture, transportation and maintenance of the movable cross beam 2 are reduced. The plunger of the master cylinder 31 is connected with the main beam 21 and is adapted to extend toward the main beam 21 to push the movable cross beam 2 downward to pressurize the workpiece; the plungers of the leveling cylinders 32 are connected to the guide beam 22 and adapted to protrude toward the main beam 21 so that the four leveling cylinders 32 level the movable cross member 2 by adjusting the heights of the four corners of the movable cross member 2 in an inclined state.
Although the present disclosure has been described above, the scope of the present disclosure is not limited thereto. Various changes and modifications may be effected therein by one of ordinary skill in the pertinent art without departing from the spirit and scope of the present disclosure, and these changes and modifications are intended to be within the scope of the present disclosure.
Claims (10)
1. A multi-cylinder stepped pressurizing method of a hydraulic machine is characterized by comprising the following steps:
acquiring a pressurization setting parameter of the hydraulic machine;
according to the pressurization setting parameters, determining a pressurization setting value of the system working pressure of a pressurization hydraulic cylinder combination and the pressurization hydraulic cylinder combination in a hydraulic cylinder structure (3) of the hydraulic machine;
and controlling the pressurizing hydraulic cylinder combination to perform pressurizing operation when the system working pressure is the pressurizing set value.
2. A multi-cylinder stepped pressurization method of a hydraulic machine according to claim 1, characterized in that said hydraulic cylinder structure (3) comprises a master hydraulic cylinder (31) and a leveling cylinder (32) vertically arranged between an upper support beam (1) and a movable cross beam (2) of said hydraulic machine; the pressurizing hydraulic cylinder combination is provided with a plurality of groups, and each group of pressurizing hydraulic cylinder combination is composed of the main hydraulic cylinder (31) or composed of the main hydraulic cylinder (31) and the leveling cylinder (32); and determining a pressurized hydraulic cylinder combination in a hydraulic cylinder structure (3) of the hydraulic machine to determine a group of pressurized hydraulic cylinder combinations.
3. A method for multi-cylinder staged pressurization of hydraulic machines, according to claim 2, characterized in that a plurality of said master cylinders (31) are distributed in an array between said upper support beam (1) and said movable cross beam (2).
4. A multi-cylinder stepped pressurization method for hydraulic machines, according to claim 3, characterized in that said levelling cylinders (32) are provided in four and an array of four of said levelling cylinders (32) is distributed between said upper support beam (1) and said mobile transverse beam (2); the master hydraulic cylinders (31) are located in an area surrounded by the four leveling cylinders (32).
5. A method for multi-cylinder stepped pressurization of a hydraulic machine according to any one of claims 2 to 4, characterized in that in a set of said combinations of pressurization cylinders constituted by said master cylinders (31), said master cylinders (31) are provided in an even number and are symmetrically distributed.
6. A multi-cylinder stepped pressurization method for hydraulic machines, according to claim 4, characterized in that in a set of said pressurization cylinder combinations constituted by said master cylinders (31) and said leveling cylinders (32), said master cylinders (31) are provided in an even number and are symmetrically distributed, and said leveling cylinders (32) are provided in four.
7. The method for the stepped pressurization of multiple cylinders of a hydraulic machine according to any one of claims 1 to 4, characterized in that said pressurization set value comprises a first preset value and a second preset value, and the second thrust of said hydraulic cylinders at the system working pressure of said second preset value is greater than the first thrust of said hydraulic cylinders at the system working pressure of said first preset value.
8. A multi-cylinder staged compression method for a hydraulic machine as described in claim 7, wherein said second thrust is an integer multiple of said first thrust.
9. A method for multi-cylinder stepped pressurization of a hydraulic machine according to any one of claims 2 to 4, characterized in that the master cylinder (31) and the leveling cylinders (32) are both plunger cylinders.
10. A multi-cylinder stepped pressurization method for hydraulic machines, according to claim 9, characterized in that said movable cross-beam (2) comprises a main beam (21) and guide beams (22) arranged at both ends of the main beam (21), the plungers of said master cylinders (31) being connected to said main beam (21), the plungers of said leveling cylinders (32) being connected to said guide beams (22).
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| CN202111489630.6A CN114161767A (en) | 2021-12-08 | 2021-12-08 | Multi-cylinder grading pressurization method of hydraulic machine |
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| CN202111489630.6A CN114161767A (en) | 2021-12-08 | 2021-12-08 | Multi-cylinder grading pressurization method of hydraulic machine |
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