CN110779813A - Dynamic shear testing machine hydraulic system and large dynamic shear testing machine with same - Google Patents
Dynamic shear testing machine hydraulic system and large dynamic shear testing machine with same Download PDFInfo
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- CN110779813A CN110779813A CN201911053822.5A CN201911053822A CN110779813A CN 110779813 A CN110779813 A CN 110779813A CN 201911053822 A CN201911053822 A CN 201911053822A CN 110779813 A CN110779813 A CN 110779813A
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- 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
- G01N3/24—Investigating strength properties of solid materials by application of mechanical stress by applying steady shearing forces
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- 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
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/0202—Control of the test
- G01N2203/0204—Safety arrangements, e.g. remote control, emergency stop
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- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention discloses a hydraulic system of a dynamic shear testing machine, which comprises a horizontal dynamic shear oil cylinder and a horizontal dynamic shear oil supply system which are connected through a water translational shear control valve group, and a vertical pressurizing oil cylinder and a vertical pressurizing oil supply system which are connected through a vertical pressurizing control valve group, wherein the horizontal dynamic shear oil supply system comprises a plurality of horizontal servo motor constant delivery pumps which are connected in parallel, oil inlets of the plurality of horizontal servo motor constant delivery pumps are communicated with an oil tank, and oil outlets of the plurality of horizontal servo motor constant delivery pumps are simultaneously communicated with oil inlets of the water translational shear control valve group. In the dynamic shear test process, a plurality of horizontal servo motor constant delivery pumps which are connected in parallel are used for replacing a traditional energy accumulator, so that sufficient pressure and flow are provided for dynamic shear, the pressure and the flow are stable, a test performance curve achieves an expected effect, the energy consumption and the noise are reduced, the oil temperature is reasonably controlled, the service life of equipment is prolonged, and the stability and the reliability of the equipment are improved. The invention also discloses a large dynamic shear testing machine comprising the hydraulic system.
Description
Technical Field
The invention relates to the field of dynamic shear tests, in particular to a hydraulic system of a dynamic shear test machine. In addition, the invention also relates to a large dynamic shear testing machine comprising the hydraulic system.
Background
The dynamic shear testing machine is widely applied to mechanical tests, and the large dynamic shear testing machine is mainly used for data tests of tests such as dynamic shear of a bridge rubber support and the like. The hydraulic system of the existing dynamic shear testing machine adopts an asynchronous motor and a constant delivery pump to form a power source, meanwhile, in order to ensure the pressure and flow in the dynamic shear process, a plurality of groups of large energy accumulators are arranged as an aid, the power source charges the energy accumulators, when a dynamic shear experiment is needed, the hydraulic pressure in the energy accumulators releases larger flow, the experiment action is carried out according to the planning, and the oil cylinder is used for position control.
The existing pressurizing scheme uses an asynchronous motor, pressurization and pressure maintaining are controlled through a proportional pressure valve, constant pressure is kept, pressure and flow cannot be kept constant by means of pressure release in an energy accumulator, and a test performance curve cannot achieve an expected effect. Meanwhile, the oil-gas separator has the defects of high energy consumption, high noise, high oil temperature, short service life, large volume and the like.
Therefore, how to provide a hydraulic system with stable pressure and flow is a technical problem to be solved by those skilled in the art.
Disclosure of Invention
The invention aims to provide a hydraulic system of a dynamic shear testing machine, which keeps the stability of pressure and flow and improves the testing accuracy by arranging a plurality of horizontal servo motor constant delivery pumps which are connected in parallel. Another object of the present invention is to provide a large dynamic shear test machine comprising the above hydraulic system.
In order to solve the technical problem, the invention provides a hydraulic system of a dynamic shear testing machine, which comprises a horizontal dynamic shear oil cylinder and a horizontal dynamic shear oil supply system which are connected through a horizontal translational shear control valve group, and a vertical pressurizing oil cylinder and a vertical pressurizing oil supply system which are connected through a vertical pressurizing control valve group, wherein the horizontal translational shear oil supply system comprises a plurality of horizontal servo motor constant delivery pumps which are connected in parallel, oil inlets of the horizontal servo motor constant delivery pumps are communicated with an oil tank, and oil outlets of the horizontal servo motor constant delivery pumps are simultaneously communicated with oil inlets of the horizontal translational shear control valve group.
Preferably, a filter screen is arranged at an inlet of each horizontal servo motor constant delivery pump, and a high-pressure filter is arranged at an outlet of each horizontal servo motor constant delivery pump.
Preferably, a check valve group is arranged between the horizontal servo motor constant delivery pump and the high-pressure filter.
Preferably, six of said horizontal servo motor fixed displacement pumps with a displacement of 100CC are included.
Preferably, the horizontal movement shear control valve group comprises a horizontal external control servo reversing valve and a plug-in overflow valve.
Preferably, the vertical pressurizing oil supply system comprises a vertical servo motor constant delivery pump, an oil inlet of the vertical servo motor constant delivery pump is communicated with an oil tank, and an oil outlet of the vertical servo motor constant delivery pump is communicated with an oil inlet of the vertical pressurizing control valve group.
Preferably, a filter screen is arranged at an inlet of the vertical servo motor constant delivery pump, and a high-pressure filter is arranged at an outlet of the vertical servo motor constant delivery pump.
Preferably, the vertical pressurization control valve group comprises a vertical servo reversing valve, an electromagnetic reversing valve and a one-way proportional overflow valve.
Preferably, the device further comprises a detector for detecting the rotating speed of the servo motor in the horizontal servo motor constant delivery pump and the vertical servo motor constant delivery pump, a sensor for detecting the position and the pressure of the constant delivery pump, and a controller connected with the sensor and the sensor.
The invention provides a large dynamic shear testing machine which comprises a hydraulic system of the dynamic shear testing machine.
The invention provides a hydraulic system of a dynamic shear testing machine, which comprises a horizontal dynamic shear oil cylinder and a horizontal dynamic shear oil supply system which are connected through a water translational shear control valve group, and a vertical pressurizing oil cylinder and a vertical pressurizing oil supply system which are connected through a vertical pressurizing control valve group, wherein the horizontal dynamic shear oil supply system comprises a plurality of horizontal servo motor constant delivery pumps which are connected in parallel, oil inlets of the plurality of horizontal servo motor constant delivery pumps are communicated with an oil tank, and oil outlets of the plurality of horizontal servo motor constant delivery pumps are simultaneously communicated with oil inlets of the water translational shear control valve group. In the dynamic shear test process, a plurality of horizontal servo motor constant delivery pumps which are connected in parallel are used for replacing a traditional energy accumulator, so that sufficient pressure and flow are provided for dynamic shear, the pressure and the flow are stable, a test performance curve achieves an expected effect, the energy consumption and the noise are reduced, the oil temperature is reasonably controlled, the service life of equipment is prolonged, and the stability and the reliability of the equipment are improved.
The invention also provides a large dynamic shear testing machine comprising the hydraulic system, and the hydraulic system has the technical effects, so the large dynamic shear testing machine also has the same technical effects, and the detailed description is omitted.
Drawings
Fig. 1 is a hydraulic schematic diagram of a specific embodiment of a hydraulic system of a dynamic shear testing machine provided by the invention.
Detailed Description
The core of the invention is to provide a hydraulic system of a dynamic shear testing machine, which keeps the stability of pressure and flow and improves the testing accuracy by arranging a plurality of horizontal servo motor constant delivery pumps which are connected in parallel. The other core of the invention is to provide a large dynamic shear testing machine comprising the hydraulic system.
In order that those skilled in the art will better understand the disclosure, the invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
Referring to fig. 1, fig. 1 is a hydraulic schematic diagram of a hydraulic system of a dynamic shear testing machine according to an embodiment of the present invention.
The invention provides a hydraulic system of a dynamic shear testing machine, which comprises a horizontal dynamic shear oil cylinder 1 and a horizontal dynamic shear oil supply system which are connected through a horizontal translational shear control valve group, and a vertical pressurizing oil cylinder 2 and a vertical pressurizing oil supply system which are connected through a vertical pressurizing control valve group, wherein vertical pressurizing is mainly used for pressurizing a sample in the vertical direction, and high-speed dynamic shear is provided by the horizontal dynamic shear to jointly complete a dynamic shear test.
The horizontal dynamic shear oil supply system comprises a plurality of horizontal servo motor constant delivery pumps 3 which are connected in parallel, oil inlets of the horizontal servo motor constant delivery pumps 3 are communicated with an oil tank, and oil outlets of the horizontal servo motor constant delivery pumps 3 are simultaneously communicated with oil inlets of the horizontal dynamic shear control valve group. The device replaces the traditional energy accumulator, reduces the maintenance and replacement cost of the energy accumulator, provides enough pressure and flow for the movable shear, ensures the pressure and the flow to be stable, enables a test performance curve to achieve the expected effect, reduces energy consumption and noise, reasonably controls oil temperature, prolongs the service life of equipment, and improves the stability and the reliability of the equipment.
In order to ensure the quality and the purity of hydraulic oil entering the system, a filter screen 4 is arranged at an inlet of each horizontal servo motor constant delivery pump 3, a high-pressure filter 5 is arranged at an outlet of each horizontal servo motor constant delivery pump 3, and the purity is improved through multiple filtration. Meanwhile, in order to prevent backflow, a check valve group may be further provided between the horizontal servo motor constant delivery pump 3 and the high pressure filter 5.
Specifically, the number and the displacement of the horizontal servo motor fixed displacement pumps 3 can be adjusted according to the needs of actual conditions, for example, six horizontal servo motor fixed displacement pumps 3 with the displacement of 100CC are arranged, so that the system requirements can be met, or the number and the displacement can be adjusted to other numbers and displacements, which are within the protection scope of the invention.
In the hydraulic system of the dynamic shear testing machine provided by the specific embodiment of the invention, the horizontal translational shear control valve group comprises a horizontal external control servo reversing valve 6 and a plug-in overflow valve 7. Specifically, the horizontal external control servo reversing valve 6 is an external control three-position four-way servo reversing valve with a 32-way diameter, an oil inlet of the horizontal external control servo reversing valve 6 is simultaneously communicated with oil outlets of all horizontal servo motor constant delivery pumps 3, an oil return port of the horizontal external control servo reversing valve 6 is communicated with an oil tank, meanwhile, a plug-in overflow valve 7 is arranged on an oil return pipeline to ensure system safety, two working oil ports of the horizontal external control servo reversing valve 6 are respectively communicated with cavities at two ends of the horizontal translational shear oil cylinder 1, the horizontal external control servo reversing valve 6 is driven by an external control part to change positions, left and right movement of the horizontal translational shear oil cylinder 1 is achieved, when the horizontal external control servo reversing valve 6 is in middle position shear, hydraulic oil cannot enter the horizontal translational oil cylinder 1, and cavities at two ends of the horizontal translational shear oil cylinder 1 are. The control is carried out through the horizontal external control servo reversing valve 6, the control precision is further improved, and other types of valves can be adopted for control.
On the basis of the hydraulic system of the dynamic shear testing machine provided by each specific embodiment, the vertical pressurizing oil supply system comprises a vertical servo motor constant delivery pump 8, an oil inlet of the vertical servo motor constant delivery pump 8 is communicated with an oil tank, and an oil outlet of the vertical servo motor constant delivery pump 8 is communicated with an oil inlet of the vertical pressurizing control valve group. The hydraulic horizontal shearing oil cylinder 2 has the advantages that the pressure maintaining function is realized, the low-rotating-speed pressure maintaining and energy saving effects are achieved, and in addition, when the horizontal shearing oil cylinder 1 moves towards the amplitude direction in the process of dynamic shearing, the vertical pressurizing oil cylinder 2 needs to maintain pressure in time.
Similarly, in order to improve the cleanliness of the hydraulic oil, a filter screen 4 is arranged at the inlet of the vertical servo motor constant delivery pump, and a high-pressure filter 5 is arranged at the outlet of the vertical servo motor constant delivery pump 8.
The vertical pressurization control valve group comprises a vertical servo reversing valve 9, an electromagnetic reversing valve 10 and a one-way proportional overflow valve 11. Specifically, the vertical servo reversing valve 9 is a three-position four-way servo reversing valve, the electromagnetic reversing valve 10 is a three-position four-way electromagnetic reversing valve, the three-position four-way electromagnetic reversing valve and the three-position four-way electromagnetic reversing valve are connected in parallel, an oil inlet is communicated with an oil outlet of a vertical servo motor constant delivery pump 8, return ports are communicated with an oil tank, two working oil ports of the two valves are respectively communicated with cavities at the upper end and the lower end of the vertical pressurizing oil cylinder 2 after being connected in parallel, a one-way proportional overflow valve 11 is arranged on an oil way connected with a rod cavity to take away heat generated by the oil pump, the oil temperature can be effectively reduced, equipment is protected, the maintenance period is long, pressure fluctuation can be reduced when the mode is.
Further, the device also comprises a detector for detecting the rotating speed of the servo motors in the horizontal servo motor constant delivery pump 3 and the vertical servo motor constant delivery pump, a sensor for detecting the position and the pressure of the constant delivery pump and a controller connected with the sensor and the sensor. After starting, a pressure target value and a flow speed upper limit are set, speed closed-loop control calculation is carried out according to a speed instruction, a current instruction is sent out, current closed-loop control calculation is carried out and finally sent to a servo motor, and meanwhile, the motor speed, the output pressure of a constant delivery pump and the like are fed back to a controller, so that closed-loop control is realized.
In addition to the hydraulic system of the dynamic shear testing machine, a specific embodiment of the present invention further provides a large dynamic shear testing machine including the hydraulic system of the dynamic shear testing machine, and the structure of other parts of the large dynamic shear testing machine refers to the prior art and is not described herein again.
The hydraulic system of the dynamic shear testing machine and the large dynamic shear testing machine with the hydraulic system are described in detail above. The principles and embodiments of the present invention are explained herein using specific examples, which are presented only to assist in understanding the method and its core concepts. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.
Claims (10)
1. The utility model provides a dynamic shear testing machine hydraulic system, includes that the hydro-translational cuts hydro-cylinder (1) and the horizontal dynamic shear oil feeding system that control valve group connects through the hydro-translational to and through perpendicular pressurization hydro-cylinder (2) and the perpendicular oil feeding system that pressurizes that perpendicular pressurization control valve group connects, its characterized in that, the hydro-translational cuts oil feeding system and includes a plurality of horizontal servo motor constant delivery pumps (3) that connect in parallel each other, and is a plurality of the oil inlet intercommunication oil tank of horizontal servo motor constant delivery pump (3), it is a plurality of the oil-out of horizontal servo motor constant delivery pump (3) communicates simultaneously the oil inlet of control valve group is cut in the hydro-translational.
2. The hydraulic system of a dynamic shear testing machine according to claim 1, wherein a filter screen (4) is arranged at an inlet of each horizontal servo motor constant delivery pump (3), and a high-pressure filter (5) is arranged at an outlet of each horizontal servo motor constant delivery pump (3).
3. A dynamic shear tester hydraulic system according to claim 2, characterized in that a check valve group is arranged between the horizontal servo motor constant delivery pump (3) and the high pressure filter (5).
4. A dynamic shear test and hydraulic system according to claim 3, characterized by comprising six horizontal servomotor fixed displacement pumps (3) with a displacement of 100 CC.
5. The hydraulic system of a dynamic shear testing machine according to claim 4, wherein the horizontal dynamic shear control valve group comprises a horizontal external control servo reversing valve (6) and a plug-in overflow valve (7).
6. The hydraulic system of a dynamic shear testing machine according to any one of claims 1 to 5, wherein the vertical pressurizing oil supply system comprises a vertical servo motor constant delivery pump (8), an oil inlet of the vertical servo motor constant delivery pump (8) is communicated with an oil tank, and an oil outlet of the vertical servo motor constant delivery pump (8) is communicated with an oil inlet of the vertical pressurizing control valve group.
7. The hydraulic system of a dynamic shear testing machine according to claim 1, wherein a filter screen (4) is arranged at an inlet of the vertical servo motor constant delivery pump, and a high-pressure filter (5) is arranged at an outlet of the vertical servo motor constant delivery pump (8).
8. A dynamic shear tester hydraulic system according to claim 7, characterized in that the vertical pressurization control valve group comprises a vertical servo directional control valve (9), an electromagnetic directional control valve (10) and a one-way proportional relief valve (11).
9. A dynamic shear test machine hydraulic system according to claim 8, characterized by further comprising a detector for detecting the rotation speed of the servo motors in the horizontal servo motor constant delivery pump (3) and the vertical servo motor constant delivery pump (8), a sensor for detecting the position and pressure of the constant delivery pumps, and a controller for connecting the two.
10. A large dynamic shear tester comprising a dynamic shear tester hydraulic system according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911053822.5A CN110779813A (en) | 2019-10-31 | 2019-10-31 | Dynamic shear testing machine hydraulic system and large dynamic shear testing machine with same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911053822.5A CN110779813A (en) | 2019-10-31 | 2019-10-31 | Dynamic shear testing machine hydraulic system and large dynamic shear testing machine with same |
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| CN110779813A true CN110779813A (en) | 2020-02-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201911053822.5A Pending CN110779813A (en) | 2019-10-31 | 2019-10-31 | Dynamic shear testing machine hydraulic system and large dynamic shear testing machine with same |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101623920A (en) * | 2009-07-30 | 2010-01-13 | 桂林星辰科技有限公司 | Energy-saving servo hydraulic control system for injection machine and control method thereof |
| CN201475067U (en) * | 2009-09-04 | 2010-05-19 | 佛山市顺德区震德塑料机械有限公司 | Multi-pump combined control hydraulic power system based on servo motor control |
| CN101716818A (en) * | 2009-12-07 | 2010-06-02 | 浙江申达机器制造股份有限公司 | Multi-servomotor energy-saving hydraulic circuit |
| CN102582054A (en) * | 2011-01-12 | 2012-07-18 | 广州博创机械有限公司 | Power system of large-sized servo injection molding machine |
| CN105782154A (en) * | 2016-05-27 | 2016-07-20 | 桥弘数控科技（上海）有限公司 | Hydraulic machining machine, hydraulic system thereof and control method of hydraulic system |
| CN205956121U (en) * | 2016-07-30 | 2017-02-15 | 江苏亚威机床股份有限公司 | One -way servopump of bender does not have overflow energy -saving control system |
| CN109632513A (en) * | 2019-01-25 | 2019-04-16 | 河南交院工程技术有限公司 | A kind of Double-hydraulic power pressure-shear test machine |
-
2019
- 2019-10-31 CN CN201911053822.5A patent/CN110779813A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101623920A (en) * | 2009-07-30 | 2010-01-13 | 桂林星辰科技有限公司 | Energy-saving servo hydraulic control system for injection machine and control method thereof |
| CN201475067U (en) * | 2009-09-04 | 2010-05-19 | 佛山市顺德区震德塑料机械有限公司 | Multi-pump combined control hydraulic power system based on servo motor control |
| CN101716818A (en) * | 2009-12-07 | 2010-06-02 | 浙江申达机器制造股份有限公司 | Multi-servomotor energy-saving hydraulic circuit |
| CN102582054A (en) * | 2011-01-12 | 2012-07-18 | 广州博创机械有限公司 | Power system of large-sized servo injection molding machine |
| CN105782154A (en) * | 2016-05-27 | 2016-07-20 | 桥弘数控科技（上海）有限公司 | Hydraulic machining machine, hydraulic system thereof and control method of hydraulic system |
| CN205956121U (en) * | 2016-07-30 | 2017-02-15 | 江苏亚威机床股份有限公司 | One -way servopump of bender does not have overflow energy -saving control system |
| CN109632513A (en) * | 2019-01-25 | 2019-04-16 | 河南交院工程技术有限公司 | A kind of Double-hydraulic power pressure-shear test machine |
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Application publication date: 20200211 |
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