CN116906418A - Control method of pressure pulse test device - Google Patents

Control method of pressure pulse test device Download PDF

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Publication number
CN116906418A
CN116906418A CN202311168059.7A CN202311168059A CN116906418A CN 116906418 A CN116906418 A CN 116906418A CN 202311168059 A CN202311168059 A CN 202311168059A CN 116906418 A CN116906418 A CN 116906418A
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pressure pulse
generating unit
pulse generating
pressure
main
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CN202311168059.7A
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CN116906418B (en
Inventor
张亮
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MAXIMATOR (SHANGHAI) FLUID ENGINEERING CO LTD
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MAXIMATOR (SHANGHAI) FLUID ENGINEERING CO LTD
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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
    • F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
    • F15B21/08—Servomotor systems incorporating electrically operated control means
    • F15B21/087—Control strategy, e.g. with block diagram
    • 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
    • F15B13/00—Details of servomotor systems ; Valves for servomotor systems
    • F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
    • 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
    • F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
    • F15B21/12—Fluid oscillators or pulse generators
    • 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
    • F15B3/00—Intensifiers or fluid-pressure converters, e.g. pressure exchangers; Conveying pressure from one fluid system to another, without contact between the fluids
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N3/02—Details
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N3/32—Investigating strength properties of solid materials by application of mechanical stress by applying repeated or pulsating forces
    • G01N3/36—Investigating strength properties of solid materials by application of mechanical stress by applying repeated or pulsating forces generated by pneumatic or hydraulic means
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/60—Circuit components or control therefor
    • F15B2211/63—Electronic controllers
    • F15B2211/6303—Electronic controllers using input signals
    • F15B2211/6306—Electronic controllers using input signals representing a pressure
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/60—Circuit components or control therefor
    • F15B2211/63—Electronic controllers
    • F15B2211/6303—Electronic controllers using input signals
    • F15B2211/6336—Electronic controllers using input signals representing a state of the output member, e.g. position, speed or acceleration

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
  • Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)

Abstract

The invention discloses a control method of a pressure pulse test device. The method comprises the following steps: acquiring a pressure instruction required by a test; the pressure command comprises a preset pressure value; driving a booster of the main pressure pulse generating unit to act according to the pressure command; acquiring the piston position percentage of the main pressure pulse generating unit; driving a booster of the auxiliary pressure pulse generating unit to act according to the piston position percentage of the main pressure pulse generating unit; judging whether the pressure of the main pressure pulse generating unit is equal to a preset pressure value; if so, the operation of the booster driving the main pressure pulse generating unit is stopped. According to the embodiment of the invention, the auxiliary pressure pulse generating unit is driven by the piston position percentage of the main pressure pulse generating unit, so that the mutual resistance between the output pressures of the two sets of pressure pulse generating units is avoided, the cooperative control of the multiple sets of pressure pulse generating units is realized, and the production and manufacturing specification types of the supercharger are reduced.

Description

Control method of pressure pulse test device
Technical Field
The invention relates to the technical field of fatigue testing, in particular to a control method of a pressure pulse test device.
Background
Most of the existing pressure pulse test devices are custom developed according to test requirements, typically a 1000bar pressure pulse test device of <10mL and a 875bar pressure pulse test device of > 200L. There is no uniform specification of the pressure pulse test stand in the market.
To solve such problems, a serialization method is generally adopted for processing according to application scenes and pressure levels. However, this method cannot solve all the problems, and in some cases, it is required to implement two tests with a larger span, and in this case, a custom development mode may be adopted, or a capacity expansion mode may be adopted for processing. If a pulse generator with a new specification is customized and developed, the problems of long development period, tension production period and difficult after-sales maintenance can be encountered; therefore, the expansion by using the existing pressure pulse generating device is a key to solve the problem.
However, there are output pressure issues with each other and control dyssynchrony when connecting separate pressure pulse generating devices together for pulse testing.
Disclosure of Invention
The invention provides a control method of a pressure pulse test device, which is used for avoiding the mutual resistance between the output pressures of a plurality of sets of pressure pulse generation units and realizing the cooperative control of two sets of pressure pulse generation units.
According to an aspect of the present invention, there is provided a pressure pulse test device control method, the pressure pulse test device including a main pressure pulse generating unit and at least one auxiliary pressure pulse generating unit; the main pressure pulse generating unit and the auxiliary pressure pulse generating unit are connected in parallel; the control method of the pressure pulse test device comprises the following steps:
acquiring a pressure instruction required by a test; wherein the pressure command comprises a preset pressure value;
driving a booster of the main pressure pulse generating unit to act according to the pressure command;
acquiring the piston position percentage of the main pressure pulse generating unit;
driving a booster of the auxiliary pressure pulse generating unit to act according to the piston position percentage of the main pressure pulse generating unit;
judging whether the pressure of the main pressure pulse generating unit is equal to the preset pressure value;
if yes, stopping driving the booster of the main pressure pulse generating unit.
Optionally, the step of obtaining the piston position percentage of the main pressure pulse generating unit comprises:
acquiring the oil cylinder size and the piston position of a supercharger of the main pressure pulse generation unit;
and calculating the piston position percentage of the main pressure pulse generating unit according to the oil cylinder size of the booster of the main pressure pulse generating unit and the piston position.
Optionally, the step of driving the booster action of the auxiliary pressure pulse generating unit according to the piston position percentage of the main pressure pulse generating unit comprises:
acquiring the oil cylinder size of a supercharger of the auxiliary pressure pulse generating unit;
driving a piston of a booster of the auxiliary pressure pulse generating unit to act according to the piston position percentage of the main pressure pulse generating unit;
acquiring the piston position of a supercharger of the auxiliary pressure pulse generating unit;
calculating the piston position percentage of the auxiliary pressure pulse generating unit according to the oil cylinder size of the booster of the auxiliary pressure pulse generating unit and the piston position;
judging whether the piston position percentage of the auxiliary pressure pulse generating unit is the same as the piston position percentage of the main pressure pulse generating unit;
if yes, stopping driving the booster of the auxiliary pressure pulse generating unit.
According to another aspect of the present invention, there is provided a pressure pulse test apparatus comprising:
the pre-filling and oil supplementing module is used for providing high-pressure working test media for the tested workpiece and the pressure pulse generating module;
a pressure pulse generating module comprising a primary pressure pulse generating unit and at least one secondary pressure pulse generating unit; the main pressure pulse generating unit is connected between the pre-charging and oil supplementing module and the tested workpiece; the auxiliary pressure pulse generating unit is connected with the main pressure pulse generating unit in parallel; the pressure pulse generation module is used for providing pressure for the tested workpiece.
Optionally, the structure of the primary pressure pulse generating unit and the structure of the secondary pressure pulse generating unit are identical.
Optionally, the main pressure pulse generating unit includes: a pressure generating assembly and a pressure control assembly;
the first connecting port of the pressure generating component is connected with the pre-charging and oil supplementing module; the second connecting port of the pressure generating component is connected with the tested workpiece; the third connecting port of the pressure generating component is connected with the first connecting port of the pressure control component; the fourth connecting port of the pressure generating component is connected with the second connecting port of the pressure control component;
the pressure generating assembly is used for providing pressure for the tested workpiece; the pressure control assembly is used for controlling the output pressure of the pressure generating assembly.
Optionally, the pressure generating assembly includes: the device comprises a supercharger, a one-way valve, an unloading valve and a pneumatic control stop valve;
the first end of the one-way valve is connected with the pre-charging and oil supplementing module; the second end of the one-way valve is connected with the first connecting port of the supercharger; the second connecting port of the supercharger is connected with the first end of the pneumatic control stop valve; the second end of the pneumatic control stop valve is connected with the tested workpiece; the third connecting port of the supercharger is connected with the unloading valve; the fourth connecting port of the supercharger is used as a third connecting port of the pressure generating component; the fifth connection port of the supercharger serves as a fourth connection port of the pressure generating assembly.
Optionally, the supercharger is provided with a pressure sensor and a position sensor.
Optionally, the pressure control assembly includes: a closed pump and a control subunit;
the first connecting port of the closed pump is used as the first connecting port of the pressure control assembly; the second connecting port of the closed pump is used as the second connecting port of the pressure control assembly; the control subunit is connected with the closed pump;
the control subunit is used for controlling the pressure generating component through the closed pump.
Optionally, the pressure control assembly further comprises: an open hydraulic pump, a servo valve and a control subunit;
the first connecting port of the servo valve is used as the first connecting port of the pressure control assembly; the second connecting port of the servo valve is used as the second connecting port of the pressure control assembly; the third connecting port of the servo valve is connected with the open hydraulic pump; the fourth connecting port of the servo valve is connected with the oil tank; the control subunit is connected with the servo valve;
the control subunit is used for controlling the pressure generating component through the servo valve.
According to the embodiment of the invention, the main pressure pulse generating unit is driven through the pressure command, the piston position percentage of the main pressure pulse generating unit is detected, and the auxiliary pressure pulse generating unit is driven through the piston position percentage of the main pressure pulse generating unit, so that a follow-up system is formed, the piston of the booster in the auxiliary pressure pulse generating unit moves along with the piston of the booster in the main pressure pulse generating unit, and whether the common output pressure of the main pressure pulse generating unit and the auxiliary pressure pulse generating unit meets the requirement of a workpiece to be tested is determined according to the output pressure of the main pressure pulse generating unit. According to the embodiment of the invention, the auxiliary pressure pulse generating unit is driven by the piston position percentage of the main pressure pulse generating unit, so that the piston of the booster in the auxiliary pressure pulse generating unit moves along with the piston of the booster in the main pressure pulse generating unit, mutual resistance between the output pressures of the two sets of pressure pulse generating units is avoided, cooperative control of the multiple sets of pressure pulse generating units is realized, and the production and manufacturing specification types of the booster are reduced.
It should be understood that the description in this section is not intended to identify key or critical features of the embodiments of the invention or to delineate the scope of the invention. Other features of the present invention will become apparent from the description that follows.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a pressure pulse test apparatus according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of another pressure pulse test apparatus provided in an embodiment of the present invention;
FIG. 3 is a flow chart of a control method of a pressure pulse test device according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of the operation of a primary pressure pulse generating unit and a secondary pressure pulse generating unit according to an embodiment of the present invention;
FIG. 5 is a flow chart of another control method of a pressure pulse test apparatus according to an embodiment of the present invention;
fig. 6 is a flowchart of a booster operation process of the auxiliary pressure pulse generating unit according to an embodiment of the present invention.
Detailed Description
In order that those skilled in the art will better understand the present invention, a technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in which it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present invention without making any inventive effort, shall fall within the scope of the present invention.
It should be noted that the terms "first," "second," and the like in the description and the claims of the present invention and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments of the invention described herein may be implemented in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
The embodiment of the invention provides a control method of a pressure pulse test device. The pressure pulse test device comprises a main pressure pulse generating unit and at least one auxiliary pressure pulse generating unit; and the main pressure pulse generating unit and the auxiliary pressure pulse generating unit are connected in parallel; the pressure pulse test device is used for executing the control method of the pressure pulse test device provided by any embodiment of the invention. In order to facilitate understanding of the control method of the pressure pulse test device provided by the present invention, first, a description will be given of the structure of the pressure pulse test device to which the control method of the pressure pulse test device is applied.
Fig. 1 is a schematic diagram of a pressure pulse test apparatus according to an embodiment of the present invention. Referring to fig. 1, the apparatus includes: a pre-charge and make-up module 110 and a pressure pulse generation module.
The pre-filling and oil supplementing module 110 is used for providing a high-pressure working test medium for the tested workpiece 130; the pressure pulse generating module comprises a main pressure pulse generating unit 121 and at least one auxiliary pressure pulse generating unit 122; the main pressure pulse generating unit 121 is connected between the pre-charge and oil-make-up module 110 and the workpiece 130 under test; the auxiliary pressure pulse generation unit 122 is connected in parallel with the main pressure pulse generation unit 121; the pressure pulse generating module is used for providing pressure for the tested workpiece 130; wherein the primary pressure pulse generating unit 121 and the secondary pressure pulse generating unit 122 each comprise a piston.
Specifically, before testing the workpiece 130, the pre-charge and oil replenishment module 110 delivers high-pressure working test medium to the workpiece 130 until the workpiece 130 is full. The pressure pulse generating module applies pressure to the high-pressure working test medium in the tested workpiece 130 according to the pressure command after the tested workpiece 130 is filled with the high-pressure working test medium, so that the pressure in the tested workpiece 130 is increased. In this process, the main pressure pulse generating unit 121 drives the piston to move according to the pressure command, and the piston of the auxiliary pressure pulse generating unit 122 follows the piston movement of the main pressure pulse generating unit 121. It should be noted that, both the main pressure pulse generating unit 121 and the auxiliary pressure pulse generating unit 122 may operate independently, i.e., the main pressure pulse generating unit 121 and the auxiliary pressure pulse generating unit 122 may serve as independent pressure pulse generating units to provide the test pressure to the workpiece 130. The main pressure pulse generating unit 121 is configured to receive a pressure command, and is essentially indistinguishable from the auxiliary pressure pulse generating unit 122, except that the auxiliary pressure pulse generating unit 122 does not receive a pressure command. In case of a failure of a certain pressure pulse generating unit, the failed pressure pulse generating unit may be isolated alone, in which case the failed pressure pulse generating unit no longer takes part in the operation. If the failed pressure pulse generating unit is the main pressure pulse generating unit 121, the main pressure pulse generating unit 121 is isolated, the main pressure pulse generating unit 121 no longer receives a pressure command, the pressure command at this time is sent to one of the auxiliary pressure pulse generating units 122, the auxiliary pressure pulse generating unit 122 is used as a new main pressure pulse generating unit 121, and the rest of the auxiliary pressure pulse generating units 122 act following the pressure pulse generating units.
On the basis of the above embodiments, optionally, with continued reference to fig. 1, the main pressure pulse generating unit 121 includes: a pressure generating assembly 1211 and a pressure control assembly 1212.
The first connection port of the pressure generating assembly 1211 is connected to the pre-charge and oil refill module 110; the second connection port of the pressure generating component 1211 is connected to the workpiece 130 under test; the third connection port of the pressure generating assembly 1211 is connected to the first connection port of the pressure control assembly 1212; the fourth connection port of the pressure generating assembly 1211 is connected to the second connection port of the pressure control assembly 1212; the pressure generating component 1211 is configured to provide pressure to the workpiece 130 under test; the pressure control assembly 1212 is used to control the output pressure of the pressure generating assembly 1211.
Specifically, the pressure control assembly 1212 obtains a pressure command and outputs a certain initial pressure to the pressure generating assembly 1211 in accordance with the pressure command, and the pressure generating assembly 1211 amplifies the initial pressure and applies it to the workpiece 130 under test.
Optionally, with continued reference to fig. 1, based on the above embodiments, the pressure generating assembly 1211 includes: a supercharger 210, a check valve 220, an unloading valve 230 and a pneumatic shut-off valve 240.
A first end of the check valve 220 is connected to the priming and oil refill module 110; a second end of the check valve 220 is connected to a first connection port of the supercharger 210; the second connection port of the supercharger 210 is connected with the first end of the pneumatic control stop valve 240; a second end of the pneumatic control stop valve 240 is connected with the workpiece 130 to be tested; the third connection port of the supercharger 210 is connected to the unloading valve 230; the fourth connection port of the supercharger 210 serves as the third connection port of the pressure generating assembly 1211; the fifth connection port of the supercharger 210 serves as a fourth connection port of the pressure generating assembly 1211.
In particular, the one-way valve 220 is also called a check valve or a check valve, which is used to prevent the reverse flow of oil in a hydraulic system or compressed air in a pneumatic system. The unloading valve 230 is a valve for controlling the pressure in the container, which is used to release the high pressure. The pneumatic control stop valve 240 can control the flow of the fluid, and satisfies the flow control, constant pressure control and diversion of the fluid. In case of failure of the pressure pulse unit, the pneumatic shut-off valve 240 will be closed, thereby shutting off the connection of the failed pressure pulse unit to the tested workpiece 130, and the high pressure operation test medium in the failed pressure pulse generating unit cannot flow back to the pre-charge and oil compensating module 110 under the action of the check valve 220. At this time, the unloading valve 230 of the failed pressure pulse generating unit is opened, the high pressure in the failed pressure pulse generating unit is released, and the failed pressure pulse generating unit is completely isolated.
Referring to fig. 1, in testing the workpiece 130 under test, a supercharger 210 supercharges a high-pressure operation test medium in the workpiece 130 under test. During testing, the pneumatic shut-off valve 240 controls the pressure transfer in the pipeline. When the pneumatic control stop valve 240 is opened, the pressure output by the booster 210 is transmitted to the tested workpiece 130 by a pipeline; when the air-operated shutoff valve 240 is closed, the pressure output from the booster 210 is blocked by the air-operated shutoff valve 240, and the pressure in the workpiece 130 to be measured does not increase. The unloading valve 230 is used to release the pressure in the supercharger 210, and when the unloading valve 230 is opened, the supercharger 210 is in an open state, and at this time, the supercharger 210 is in communication with the external environment, and the internal pressure thereof is consistent with the atmospheric pressure.
Alternatively, with continued reference to fig. 1, the structure of the main pressure pulse generating unit 121 and the structure of the auxiliary pressure pulse generating unit 122 are the same, on the basis of the above-described embodiments. Specifically, the structure of the main pressure pulse generating unit 121 and the structure of the auxiliary pressure pulse generating unit 122 being identical means that the structure of the main pressure pulse generating unit 121 and the auxiliary pressure pulse generating unit 122 have the same architecture. For example, the main pressure pulse generating unit 121 has three parts A, B and C, and the auxiliary pressure pulse generating unit 122 also has three parts A, B and C. It should be noted that, although the structure of the main pressure pulse generating unit 121 and the structure of the auxiliary pressure pulse generating unit 122 are the same, there may be a difference in the structures of the main pressure pulse generating unit 121 and the models of the respective components in the auxiliary pressure pulse generating unit 122. A parallel capacity expansion when the structure of the main pressure pulse generation unit 121 and the maximum stroke and maximum output pressure of the booster of the auxiliary pressure pulse generation unit 122 coincide; the mixing expansion is referred to when the structure of the main pressure pulse generating unit 121 and the maximum output pressure of the booster of the auxiliary pressure pulse generating unit 122 are identical but the maximum strokes of the boosters are not identical.
Alternatively, with continued reference to fig. 1, the supercharger 210 is provided with a pressure sensor 211 and a position sensor 212, based on the above embodiments. Specifically, the pressure sensor 211 is disposed on top of the supercharger 210; the position sensor 212 is disposed at the bottom of the supercharger 210 and connected to the piston, and the position sensor 212 is used to detect the position of the piston.
Optionally, with continued reference to fig. 1, based on the embodiments described above, the pressure control assembly 1212 includes: a closed pump 310 and a control subunit (not shown). The first connection port of the closed pump 310 serves as the first connection port of the pressure control assembly 1212; the second port of the closed pump 310 serves as the second port of the pressure control assembly 1212. The control subunit is connected with a closed pump 310; the control subunit is configured to control the pressure generating assembly 1211 via the closed pump 310. The closed pump is used to change the initial pressure value of the supercharger 210 and thereby control the output pressure of the supercharger 210.
Fig. 2 is a schematic diagram of another pressure pulse test apparatus according to an embodiment of the present invention. Alternatively, the present embodiment provides another configuration of the pressure control assembly 1212. Referring to fig. 2, the pressure control assembly includes: a servo valve 320, an open hydraulic pump 330 and a control subunit (not shown).
The first connection port of the servo valve 320 serves as the first connection port of the pressure control assembly 1212; a second connection port of the servo valve 320 serves as a second connection port of the pressure control assembly 1212; the third connection port of the servo valve 320 is connected with the open hydraulic pump 330; the fourth connection port of the servo valve 320 is connected to an oil tank (not shown in the figure); the control subunit is connected with a servo valve 320; the control subunit is configured to control the pressure generating assembly 1211 via the servo valve 320.
The embodiment of the invention also provides a control method of the pressure pulse test device, and the control method of the pressure pulse test device provided by any embodiment of the invention can realize cooperative control of the main pressure pulse generation unit and the auxiliary pressure pulse generation unit. The following examples will specifically explain the control method of the pressure pulse test apparatus.
Fig. 3 is a flowchart of a control method of a pressure pulse test apparatus according to an embodiment of the present invention. Referring to fig. 3, the pressure pulse test apparatus control method includes:
s110, acquiring a pressure instruction required by a test; the pressure command comprises a preset pressure value.
Specifically, the preset pressure value is a preset output pressure value of the main pressure pulse generating unit, which is related to the test requirement of the tested workpiece. In practical application, the preset pressure value can be set according to the requirement of the workpiece to be tested, which is not limited in this embodiment.
And S120, driving the booster of the main pressure pulse generating unit to act according to the pressure command.
Specifically, after receiving the pressure instruction, the main pressure pulse generating unit starts to work, and at this time, the servo valve or the closed pump of the main pressure pulse generating unit drives the piston in the booster of the main pressure pulse generating unit, so as to increase the output pressure of the main pressure pulse generating unit, so as to test the workpiece to be tested.
S130, acquiring the piston position percentage of the main pressure pulse generating unit.
Specifically, the piston position of the pressure booster in the main pressure pulse generating unit may change when the main pressure pulse generating unit is operated. The piston position percentage refers to the position of the piston of the supercharger in the cylinder of the supercharger relative to the full stroke of the cylinder. Since the output pressure of the pulse generating unit is related to the piston position of the pressure pulse generating unit, the piston position percentage of the pressure pulse generating unit is also indirectly indicative of the magnitude of the output pressure of the pressure pulse generating unit. For example, when the highest output pressure of the pressure pulse generating unit is 1000bar at a specific workpiece volume, at a certain moment, the piston position percentage of the pressure pulse generating unit is ten percent, and then the output pressure of the pressure pulse generating unit can be regarded as approximately 100bar.
And S140, driving the booster of the auxiliary pressure pulse generating unit to act according to the piston position percentage of the main pressure pulse generating unit.
Fig. 4 is a schematic operation diagram of a primary pressure pulse generating unit and a secondary pressure pulse generating unit according to an embodiment of the present invention. Referring to fig. 4, specifically, the auxiliary pressure pulse generating unit drives the piston in the auxiliary pressure pulse generating unit booster according to the piston position percentage of the main pressure pulse generating unit, so that the piston position percentage of the auxiliary pressure pulse generating unit is kept consistent with the piston position percentage of the main pressure pulse generating unit, thereby ensuring that the piston movement of the main pressure pulse generating unit booster is synchronized with the piston movement of the auxiliary pressure pulse generating unit booster. The output pressure of the pressure pulse generating unit can be obtained through the piston position percentage, so that the common output pressure of the main pressure pulse generating unit and the auxiliary pressure pulse generating unit can be obtained.
S150, judging whether the output pressure of the main pressure pulse generating unit is equal to a preset pressure value; if yes, S160 is executed.
Specifically, since the output pressure of the pressure pulse generating unit gradually changes, the output pressure of the main pressure pulse generating unit gradually approaches to a preset pressure value from zero, in the process, the output pressure of the main pressure pulse generating unit needs to be detected, and the detected output pressure is compared with the preset pressure value to determine whether the output pressure of the main pressure pulse generating unit reaches the preset pressure value, so as to determine whether the output pressure of the main pressure pulse generating unit and the auxiliary pressure pulse generating unit together meets the requirement of a workpiece to be detected.
And S160, stopping the operation of the supercharger driving the main pressure pulse generating unit.
According to the embodiment of the invention, the main pressure pulse generating unit is driven through the pressure command, the piston position percentage of the main pressure pulse generating unit is detected, and the auxiliary pressure pulse generating unit is driven through the piston position percentage of the main pressure pulse generating unit, so that a follow-up system is formed, the piston of the booster in the auxiliary pressure pulse generating unit moves along with the piston of the booster in the main pressure pulse generating unit, and whether the common output pressure of the main pressure pulse generating unit and the auxiliary pressure pulse generating unit meets the requirement of a workpiece to be tested is determined according to the output pressure of the main pressure pulse generating unit. According to the embodiment of the invention, the auxiliary pressure pulse generating unit is driven by the piston position percentage of the main pressure pulse generating unit, so that the piston of the booster in the auxiliary pressure pulse generating unit moves along with the piston of the booster in the main pressure pulse generating unit, mutual resistance between the output pressures of the two sets of pressure pulse generating units is avoided, cooperative control of the multiple sets of pressure pulse generating units is realized, and the production and manufacturing specification types of the booster are reduced.
FIG. 5 is a flow chart of another control method of a pressure pulse test apparatus according to an embodiment of the present invention. Optionally, referring to fig. 5, the step of obtaining the piston position percentage of the main pressure pulse generating unit includes:
s131, acquiring the oil cylinder size and the piston position of the booster of the main pressure pulse generation unit.
Specifically, the oil cylinders of different superchargers are different in size, and the oil cylinder of the supercharger refers to the whole stroke size of the oil cylinder of the supercharger; the piston position refers to the position of the piston in the booster cylinder. For example, the piston position of the supercharger may be obtained by a position sensor.
And S132, calculating the piston position percentage of the main pressure pulse generating unit according to the oil cylinder size and the piston position of the booster of the main pressure pulse generating unit.
Specifically, the stroke of the piston in the oil cylinder can be determined according to the position of the piston, and the piston position percentage of the main pressure pulse generating unit can be calculated according to the stroke of the piston in the oil cylinder and the whole stroke of the oil cylinder.
Fig. 6 is a flowchart of a booster operation process of the auxiliary pressure pulse generating unit according to an embodiment of the present invention. Optionally, in combination with fig. 3 and 6, the step of driving the booster action of the auxiliary pressure pulse generating unit according to the piston position percentage of the main pressure pulse generating unit includes:
s141, acquiring the oil cylinder size of the booster of the auxiliary pressure pulse generating unit.
Specifically, the oil cylinders of different superchargers are different in size, and the oil cylinder of the supercharger refers to the whole stroke size of the oil cylinder of the supercharger.
And S142, driving the piston of the booster of the auxiliary pressure pulse generating unit to act according to the piston position percentage of the main pressure pulse generating unit.
Specifically, the auxiliary pressure pulse generating unit drives the piston in the booster of the auxiliary pressure pulse generating unit according to the piston position percentage of the main pressure pulse generating unit, so that the piston position percentage of the auxiliary pressure pulse generating unit is consistent with the piston position percentage of the main pressure pulse generating unit, and the piston movement of the booster of the main pressure pulse generating unit is synchronous with the piston movement of the booster of the auxiliary pressure pulse generating unit.
S143, acquiring the piston position of the booster of the auxiliary pressure pulse generating unit.
For example, the piston position of the supercharger may be obtained by a position sensor.
S144, calculating the piston position percentage of the auxiliary pressure pulse generating unit according to the oil cylinder size and the piston position of the booster of the auxiliary pressure pulse generating unit.
Specifically, the stroke of the piston in the oil cylinder can be determined according to the position of the piston, and the piston position percentage of the auxiliary pressure pulse generating unit can be calculated according to the stroke of the piston in the oil cylinder and the whole stroke of the oil cylinder.
S145, judging whether the piston position percentage of the auxiliary pressure pulse generating unit is the same as that of the main pressure pulse generating unit; if yes, then execution proceeds to S146.
Specifically, the piston position percentage characterizes the position of the piston in the cylinder of the supercharger relative to the full stroke of the cylinder. When the piston position percentage of the auxiliary pressure pulse generating unit is the same as that of the main pressure pulse generating unit, the position of the piston in the auxiliary pressure pulse generating unit relative to the whole stroke of the oil cylinder is the same as that of the piston in the main pressure pulse generating unit relative to the whole stroke of the oil cylinder, at the moment, the pressures born by the piston in the auxiliary pressure pulse generating unit and the piston in the main pressure pulse generating unit are the same, and the output pressure of the piston in the auxiliary pressure pulse generating unit and the piston in the main pressure pulse generating unit is the same as the percentage of the maximum output pressure.
And S146, stopping the operation of the booster driving the auxiliary pressure pulse generating unit.
It should be appreciated that various forms of the flows shown above may be used to reorder, add, or delete steps. For example, the steps described in the present invention may be performed in parallel, sequentially, or in a different order, so long as the desired results of the technical solution of the present invention are achieved, and the present invention is not limited herein.
The above embodiments do not limit the scope of the present invention. It will be apparent to those skilled in the art that various modifications, combinations, sub-combinations and alternatives are possible, depending on design requirements and other factors. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of the present invention.

Claims (3)

1. A pressure pulse test device control method, characterized in that the pressure pulse test device comprises a main pressure pulse generating unit and at least one auxiliary pressure pulse generating unit; the main pressure pulse generating unit and the auxiliary pressure pulse generating unit are connected in parallel; the main pressure pulse generating unit and the auxiliary pressure pulse generating unit can work independently, and the connection mode between the main pressure pulse generating unit and the auxiliary pressure pulse generating unit comprises parallel expansion and mixed expansion; the control method of the pressure pulse test device comprises the following steps:
acquiring a pressure instruction required by a test; wherein the pressure command comprises a preset pressure value;
driving a booster of the main pressure pulse generating unit to act according to the pressure command;
acquiring the piston position percentage of the main pressure pulse generating unit;
driving a booster of the auxiliary pressure pulse generating unit to act according to the piston position percentage of the main pressure pulse generating unit;
judging whether the pressure of the main pressure pulse generating unit is equal to the preset pressure value;
if yes, stopping driving the booster of the main pressure pulse generating unit.
2. The pressure pulse test apparatus control method according to claim 1, wherein the step of obtaining the piston position percentage of the main pressure pulse generating unit includes:
acquiring the oil cylinder size and the piston position of a supercharger of the main pressure pulse generation unit;
and calculating the piston position percentage of the main pressure pulse generating unit according to the oil cylinder size of the booster of the main pressure pulse generating unit and the piston position.
3. The pressure pulse test apparatus control method according to claim 2, wherein the step of driving the booster action of the auxiliary pressure pulse generating unit according to the piston position percentage of the main pressure pulse generating unit includes:
acquiring the oil cylinder size of a supercharger of the auxiliary pressure pulse generating unit;
driving a piston of a booster of the auxiliary pressure pulse generating unit to act according to the piston position percentage of the main pressure pulse generating unit;
acquiring the piston position of a supercharger of the auxiliary pressure pulse generating unit;
calculating the piston position percentage of the auxiliary pressure pulse generating unit according to the oil cylinder size of the booster of the auxiliary pressure pulse generating unit and the piston position;
judging whether the piston position percentage of the auxiliary pressure pulse generating unit is the same as the piston position percentage of the main pressure pulse generating unit;
if yes, stopping driving the booster of the auxiliary pressure pulse generating unit.
CN202311168059.7A 2023-09-12 2023-09-12 Control method of pressure pulse test device Active CN116906418B (en)

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102445399A (en) * 2011-12-12 2012-05-09 麦格思维特(上海)流体工程有限公司 Pulse test bench and pressurizer
CN105181475A (en) * 2015-10-28 2015-12-23 四川杰特机器有限公司 Impulse test system supercharged through servo electric cylinder
CN106053242A (en) * 2016-05-26 2016-10-26 麦格思维特(上海)流体工程有限公司 Testing platform capable maintaining high pressure for long time and workpiece testing method
CN213902747U (en) * 2020-12-18 2021-08-06 广东海德利森一氢科技有限公司 Hydrogen impact pulse test system
CN113984510A (en) * 2021-11-29 2022-01-28 麦格思维特(上海)流体工程有限公司 Pump control pressure fatigue pulse test bench based on asymmetric cylinder

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102445399A (en) * 2011-12-12 2012-05-09 麦格思维特(上海)流体工程有限公司 Pulse test bench and pressurizer
CN105181475A (en) * 2015-10-28 2015-12-23 四川杰特机器有限公司 Impulse test system supercharged through servo electric cylinder
CN106053242A (en) * 2016-05-26 2016-10-26 麦格思维特(上海)流体工程有限公司 Testing platform capable maintaining high pressure for long time and workpiece testing method
CN213902747U (en) * 2020-12-18 2021-08-06 广东海德利森一氢科技有限公司 Hydrogen impact pulse test system
CN113984510A (en) * 2021-11-29 2022-01-28 麦格思维特(上海)流体工程有限公司 Pump control pressure fatigue pulse test bench based on asymmetric cylinder

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