CN210003606U - hydraulic cylinder durability testing device with power recovery function - Google Patents
hydraulic cylinder durability testing device with power recovery function Download PDFInfo
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- CN210003606U CN210003606U CN201920963962.5U CN201920963962U CN210003606U CN 210003606 U CN210003606 U CN 210003606U CN 201920963962 U CN201920963962 U CN 201920963962U CN 210003606 U CN210003606 U CN 210003606U
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- 238000012360 testing method Methods 0.000 title claims abstract description 37
- 238000011084 recovery Methods 0.000 title claims abstract description 27
- 239000003921 oil Substances 0.000 claims description 115
- 230000001502 supplementing effect Effects 0.000 claims description 16
- 239000010720 hydraulic oil Substances 0.000 claims description 13
- 238000006073 displacement reaction Methods 0.000 claims description 10
- 238000001816 cooling Methods 0.000 abstract description 3
- 239000002828 fuel tank Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000010998 test method Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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Abstract
The utility model provides an pneumatic cylinder durability testing arrangement with power recovery function, including hydro-cylinder test circuit, high-pressure compensation return circuit and power recovery return circuit, hydro-cylinder test circuit includes by the test jar, the loading jar, solenoid directional valve A, solenoid directional valve B, electro-hydraulic directional valve and cartridge flow valve, high-pressure compensation return circuit includes high-pressure oil compensating pump, inverter motor A, check valve A and proportional overflow valve B power recovery return circuit includes variable pump, check valve B, proportional overflow valve A, variable motor and connects variable pump and variable motor's inverter motor B the utility model discloses a cartridge flow valve in the system return circuit realizes by the accurate control of the pneumatic cylinder velocity of being tested, reaches the highest speed continuous operation that makes by the pneumatic cylinder with the designing requirement, and the speed error is 10%'s function, the device is when the test, and the system need not add cooling system and cools off the test bench, has saved the energy, and system power recovery efficiency can reach 75% the most.
Description
Technical Field
The utility model relates to a pneumatic cylinder test technical field, concretely relates to pneumatic cylinder durability testing arrangement with power recovery function.
Background
The hydraulic cylinder is used as a main execution element of the hydraulic system, the comprehensive performance of the hydraulic cylinder not only has an influence on the performance of the system, but also influences the service life of the equipment.
According to the regulations in the current national standard GB/T15622-.
In the traditional test bed, a large amount of energy is caused by the throttling action of the directional valve to heat oil, and meanwhile, most of energy is converted into heat energy to be consumed due to the adoption of the overflow valve for loading, so that the oil temperature of the system is quickly increased due to the heat energy, and the power of a cooling system is inevitably increased to ensure that the temperature of the oil is controlled within a reasonable range. Therefore, such systems are wasteful of energy when subjected to durability tests.
In summary, there is a need for hydraulic cylinder durability testing devices with power recovery function to solve the problems in the prior art.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide an pneumatic cylinder durability testing arrangement with power recovery function to solve the serious scheduling problem of system recovery power low, energy waste.
In order to achieve the above object, the utility model provides an pneumatic cylinder durability testing arrangement with power recovery function, including hydro-cylinder test return circuit, high pressure compensating circuit and power recovery return circuit.
The oil cylinder test loop comprises a tested cylinder, a loading cylinder, an electromagnetic directional valve A, an electromagnetic directional valve B, an electro-hydraulic directional valve and a plug-in flow valve; the piston rod of the tested cylinder is connected with the piston rod of the loading cylinder through a connecting tool; a working oil port of the electromagnetic directional valve A is connected with a tested cylinder, a working oil port of the electromagnetic directional valve B is connected with a loading cylinder, a pressure oil port of the electromagnetic directional valve A is connected with an oil return oil port of the electromagnetic directional valve B through an electro-hydraulic directional valve, and the oil return oil port of the electromagnetic directional valve A is connected with a pressure oil port of the electromagnetic directional valve B; the flow cartridge valve is connected with the electro-hydraulic directional valve.
The high-pressure compensation loop comprises a high-pressure oil supplementing pump, a variable frequency motor A, a one-way valve A and a proportional overflow valve B; the variable frequency motor A is connected with a high-pressure oil supplementing pump, the high-pressure oil supplementing pump sucks hydraulic oil out of an oil tank, and the hydraulic oil flows back into the oil tank through a one-way valve A and a proportional overflow valve B in sequence; the high-pressure oil supplementing pump is connected with the plug-in flow valve through a one-way valve A.
The power recovery loop comprises a variable pump, a one-way valve B, a proportional overflow valve A, a variable motor and a variable frequency motor B which is connected with the variable pump and the variable motor; the variable pump sucks hydraulic oil out of the oil tank, and the hydraulic oil flows back to the oil tank through the check valve B, the proportional overflow valve A and the variable motor in sequence; an oil inlet of the cartridge flow valve is communicated with an oil way between the one-way valve B and the proportional overflow valve A.
Preferably, a check valve D is arranged on an oil path between an oil return port of the electromagnetic directional valve A and a pressure oil port of the electromagnetic directional valve B; the check valve D is connected with the oil tank and used for preventing the oil cylinder from being sucked empty due to oil leakage of the hydraulic cylinder and the reversing valve.
Preferably, a filter A is arranged on an oil path between the oil tank and the high-pressure oil replenishing pump; and a filter B is arranged on an oil path between the oil tank and the variable pump.
Preferably, an unloading valve is arranged on an oil path between the check valve B and the proportional overflow valve A, and the unloading valve is communicated with the oil tank.
Preferably, a check valve C communicated with an oil tank is arranged on an oil path between the proportional overflow valve A and the variable motor to prevent the variable motor from being sucked empty.
Use the technical scheme of the utility model, following beneficial effect has:
(1) the utility model discloses satisfied GB/T15622 and increased cost 2005 in "pneumatic cylinder test method" to the requirement of pneumatic cylinder durability test, experimental system pressure is adjustable, can realize the automatic stack of pneumatic cylinder stroke through displacement sensor and industrial computer system to automatic generation testing result-accumulative total stroke.
(2) The utility model discloses satisfied GB/T15622 and increased 2005 "pneumatic cylinder test method" in to the requirement of pneumatic cylinder durability test, realized being tried the accurate control of pneumatic cylinder velocity of motion through the cartridge flow valve in the system return circuit, reached and made being tried the highest speed continuous operation of pneumatic cylinder with the design requirement, speed error is 10% function. The speed of the hydraulic cylinder can be calculated by the variation of the stroke in unit time, and the device is realized by a displacement sensor and an industrial personal computer system.
(3) The device possesses the power recovery function when satisfying test standard requirement, and when the test, the system need not add cooling system and cools off the test bench, has saved the energy. The maximum power recovery efficiency of the system can reach 75 percent.
In addition to the objects, features and advantages described above, the present invention has other objects, features and advantages as will become apparent from the following detailed description which proceeds with reference to the accompanying drawings.
Drawings
The accompanying drawings, which form a part of the present application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, wherein:
fig. 1 is a schematic view of the overall structure of the present invention;
the device comprises a fuel tank 1, a fuel tank 2, filters A and 3, filters B and 4, variable frequency motors A and 5, a high-pressure oil supplementing pump 6, an unloading valve 7, a variable pump 8, variable frequency motors B and 9, a variable motor 10, proportional overflow valves A and 11, proportional overflow valves B and 12, check valves A and 13, check valves B and 14, check valves C and 15, an electro-hydraulic reversing valve 16, check valves D and 17, electromagnetic reversing valves A and 18, electromagnetic reversing valves B and 19, a tested cylinder 20, a loading cylinder 21, a connecting tool 22 and a plug-in flow valve.
Detailed Description
The embodiments of the invention will be described in detail hereinafter with reference to the accompanying drawings, but the invention can be implemented in many different ways, which are defined and covered by the claims.
Example 1:
referring to fig. 1, hydraulic cylinder durability testing devices with power recovery function comprise a cylinder testing circuit, a high-pressure compensation circuit and a power recovery circuit.
The oil cylinder testing loop comprises a tested cylinder 19, a loading cylinder 20, an electromagnetic reversing valve A17, an electromagnetic reversing valve B18, an electro-hydraulic reversing valve 15 and a cartridge flow valve 22; the piston rod of the tested cylinder 19 is connected with the piston rod of the loading cylinder 20 through a connecting tool (21); a working oil port of the electromagnetic directional valve A17 is connected with the tested cylinder 19, a working oil port of the electromagnetic directional valve B18 is connected with the loading cylinder 20, a pressure oil port of the electromagnetic directional valve A17 is connected with an oil return oil port of the electromagnetic directional valve B18 through the electro-hydraulic directional valve 15, and an oil return oil port of the electromagnetic directional valve A17 is connected with a pressure oil port of the electromagnetic directional valve B18; the flow cartridge valve is connected with the electro-hydraulic directional valve 15; a check valve D16 is arranged on an oil path between the oil return port of the electromagnetic directional valve A17 and the pressure port of the electromagnetic directional valve B18; the check valve D16 is connected to the oil tank 1 to prevent the cylinder from being emptied due to leakage of the hydraulic cylinder and the direction valve.
The high-pressure compensation loop comprises a high-pressure oil supplementing pump 5, a variable frequency motor A4, a check valve A12 and a proportional overflow valve B11; the variable frequency motor A4 is connected with the high-pressure oil supplementing pump 5, the high-pressure oil supplementing pump 5 sucks hydraulic oil out of the oil tank 1, and the hydraulic oil flows back to the oil tank 1 through the check valve A12 and the proportional overflow valve B11 in sequence; the high-pressure oil supplementing pump 5 is connected with the cartridge flow valve 22 through a one-way valve A12; a filter A2 is arranged on an oil path between the oil tank 1 and the high-pressure oil replenishing pump 5;
the power recovery loop comprises a variable pump 7, a check valve B13, a proportional overflow valve A10, a variable motor 9 and a variable frequency motor B8 which connects the variable pump 7 and the variable motor 9; the variable pump 7 sucks hydraulic oil out of the oil tank 1 and returns the hydraulic oil to the oil tank 1 through a one-way valve B13, a proportional overflow valve A10 and a variable motor 9 in sequence; an oil inlet of the cartridge flow valve 22 is communicated with an oil path between the check valve B13 and the proportional overflow valve A10. A filter B3 is provided on the oil path between the oil tank 1 and the variable displacement pump 7. And an unloading valve 6 is arranged on an oil path between the check valve B13 and the proportional overflow valve A10, and the unloading valve 6 is communicated with the oil tank 1. And a check valve C14 is arranged on an oil path between the proportional overflow valve A10 and the variable motor 9 to prevent the variable motor from being sucked empty.
The working principle of the hydraulic cylinder durability testing device with the power recovery function is that the unloading valve 6 is de-energized, the variable frequency motor A4 drives the high-pressure oil supplementing pump 5 to convert mechanical energy into hydraulic energy, and assuming that the electro-hydraulic directional valve 15 works at the right position, the high-pressure oil enters the rodless cavity of the tested cylinder 19 through the right position of the electro-magnetic directional valve A17 so as to push the piston of the tested cylinder to move rightwards, the loading cylinder 20 is connected with the piston of the tested cylinder, so that the piston of the loading cylinder also moves rightwards, hydraulic oil reaches the rod cavity of the loading cylinder from the rod cavity of the tested cylinder, and simultaneously the high-pressure oil output by the rodless cavity of the loading cylinder enters the oil inlet of the variable motor 9 through the left position of the electro-magnetic directional valve 18 and the right position of the electro-hydraulic directional valve 15 so as to drive the variable motor to rotate, and then enters the oil tank from the oil outlet of the variable motor so as to convert the hydraulic energy of the rotary mechanical energy into mechanical energy, the energy conversion efficiency of the variable frequency motor B8 slowly starts to drive the variable frequency motor B7, so that the variable frequency motor B pump and the overflow valve A pressure of the variable frequency motor 9 and the hydraulic cylinder is set as to prevent the overflow valve A.3, and the overflow valve of the high-pressure oil supplementing pump from leaking of the overflow valve, and the overflow valve.
The size of a loading cylinder and a tested cylinder is usually consistent during testing, so that the input flow and the output flow of the two hydraulic cylinders are symmetrical, in order to establish system pressure to realize loading, the output flow of a high-pressure oil supplementing pump 5 is controlled by adjusting a variable frequency motor A4, and the purpose of changing the loading pressure is achieved along with the change of the injection flow of a closed cavity, the switching of a tested piece can be realized through an electro-hydraulic directional valve 15, namely when the right position of the electro-hydraulic directional valve is switched on, a hydraulic cylinder 19 is the tested cylinder, when the left position of the electro-hydraulic directional valve is switched on, a hydraulic cylinder 20 is the tested cylinder, the switching of a high-pressure cavity of the tested cylinder can be realized through an electro-hydraulic directional valve A17 and an electro-magnetic directional valve B18, the pressure loss of the electro-magnetic directional valve 18 and the electro-hydraulic directional valve 15 is.
During the power cycle, the output power of the variable displacement motor 9 is insufficient to drive the variable displacement pump 7 due to the volume and mechanical losses, the insufficient power being compensated by the variable frequency motor B8. Power is circulated between the variable displacement pump 7 and the variable displacement motor 9 to achieve power recovery, the power flow of which is shown by the dashed arrows in fig. 1.
When the piston of the hydraulic cylinder moves to the end, the electromagnetic directional valve A17 and the electromagnetic directional valve B18 are reversed, at the moment of reversing, a hydraulic pipeline connected with the electromagnetic directional valve is suddenly closed, namely four oil ports P, T, A, B are instantly and completely blocked, and the variable pump 7 and the variable motor 9 continuously run at the same rotating speed, in the aspect of , in order to prevent the variable motor from being sucked empty, a one-way valve C14 is additionally arranged, oil is supplied to the oil port of the variable motor through an oil tank, in the aspect of two , an output oil pipeline of the variable pump 7 generates instant high pressure due to pressure building, the set value of a proportional flow valve A10 is adjusted to be matched with the pressure of each test item of the hydraulic cylinder, when the loading pressure of a system is higher than the pressure required by the test item, the proportional flow valve A10 is opened, so that the high-pressure oil overflows to the variable motor, and the purposes of limiting the high pressure and preventing.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (5)
- The hydraulic cylinder durability testing device with the power recovery function is characterized by comprising an oil cylinder testing loop, a high-pressure compensation loop and a power recovery loop;the oil cylinder test loop comprises a tested cylinder (19), a loading cylinder (20), an electromagnetic directional valve A (17), an electromagnetic directional valve B (18), an electro-hydraulic directional valve (15) and a cartridge flow valve (22); the piston rod of the tested cylinder (19) is connected with the piston rod of the loading cylinder (20) through a connecting tool (21); a working oil port of the electromagnetic directional valve A (17) is connected with a tested cylinder (19), a working oil port of the electromagnetic directional valve B (18) is connected with a loading cylinder (20), a pressure oil port of the electromagnetic directional valve A (17) is connected with an oil return port of the electromagnetic directional valve B (18) through an electro-hydraulic directional valve (15), and the oil return port of the electromagnetic directional valve A (17) is connected with the pressure oil port of the electromagnetic directional valve B (18); the flow cartridge valve is connected with an electro-hydraulic reversing valve (15);the high-pressure compensation loop comprises a high-pressure oil supplementing pump (5), a variable frequency motor A (4), a one-way valve A (12) and a proportional overflow valve B (11); the variable frequency motor A (4) is connected with a high-pressure oil supplementing pump (5), the high-pressure oil supplementing pump (5) sucks hydraulic oil out of the oil tank (1), and the hydraulic oil flows back to the oil tank (1) through a one-way valve A (12) and a proportional overflow valve B (11) in sequence; the high-pressure oil supplementing pump (5) is connected with the cartridge flow valve (22) through a one-way valve A (12);the power recovery loop comprises a variable pump (7), a one-way valve B (13), a proportional overflow valve A (10), a variable motor (9) and a variable frequency motor B (8) which is connected with the variable pump (7) and the variable motor (9); the variable pump (7) sucks hydraulic oil out of the oil tank (1), and the hydraulic oil flows back into the oil tank (1) through the one-way valve B (13), the proportional overflow valve A (10) and the variable motor (9) in sequence; an oil inlet of the plug-in flow valve (22) is communicated with an oil way between the check valve B (13) and the proportional overflow valve A (10).
- 2. The hydraulic cylinder durability test device with power recovery function according to claim 1, wherein a check valve D (16) is arranged on the oil paths of the oil return port of the electromagnetic directional valve A (17) and the pressure oil port of the electromagnetic directional valve B (18), and the check valve D (16) is connected with the oil tank (1) to prevent the oil cylinder from being emptied due to oil leakage of the hydraulic cylinder and the directional valve.
- 3. The hydraulic cylinder durability test device with power recovery function according to claim 2, wherein a filter A (2) is provided on the oil path between the oil tank (1) and the high-pressure oil supply pump (5), and a filter B (3) is provided on the oil path between the oil tank (1) and the variable displacement pump (7).
- 4. The hydraulic cylinder durability test device with power recovery function according to claim 3, wherein an unloading valve (6) is arranged on an oil path between the check valve B (13) and the proportional relief valve A (10), and the unloading valve (6) is communicated with the oil tank (1).
- 5. The hydraulic cylinder durability test device with power recovery function of any claims 1 to 4, wherein a check valve C (14) communicated with an oil tank is arranged on an oil path between the proportional relief valve A (10) and the variable displacement motor (9) to prevent the variable displacement motor (9) from being emptied.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920963962.5U CN210003606U (en) | 2019-06-25 | 2019-06-25 | hydraulic cylinder durability testing device with power recovery function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920963962.5U CN210003606U (en) | 2019-06-25 | 2019-06-25 | hydraulic cylinder durability testing device with power recovery function |
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| Publication Number | Publication Date |
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| CN210003606U true CN210003606U (en) | 2020-01-31 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201920963962.5U Expired - Fee Related CN210003606U (en) | 2019-06-25 | 2019-06-25 | hydraulic cylinder durability testing device with power recovery function |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112610560A (en) * | 2020-12-16 | 2021-04-06 | 北京玖鼎力源科技有限公司 | Test bed for hydraulic motor, hydraulic pump and rear axle |
| CN113443004A (en) * | 2021-08-18 | 2021-09-28 | 华侨大学 | Steering system of electric loading vehicle |
| CN114922883A (en) * | 2022-05-27 | 2022-08-19 | 中国人民解放军92228部队 | Hydraulic system and method for measuring wear characteristics of hydraulic fluid |
-
2019
- 2019-06-25 CN CN201920963962.5U patent/CN210003606U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112610560A (en) * | 2020-12-16 | 2021-04-06 | 北京玖鼎力源科技有限公司 | Test bed for hydraulic motor, hydraulic pump and rear axle |
| CN112610560B (en) * | 2020-12-16 | 2024-05-31 | 北京玖鼎力源科技有限公司 | Test bed for hydraulic motor, hydraulic pump and rear axle |
| CN113443004A (en) * | 2021-08-18 | 2021-09-28 | 华侨大学 | Steering system of electric loading vehicle |
| CN113443004B (en) * | 2021-08-18 | 2022-09-16 | 华侨大学 | Steering system of electric loading vehicle |
| CN114922883A (en) * | 2022-05-27 | 2022-08-19 | 中国人民解放军92228部队 | Hydraulic system and method for measuring wear characteristics of hydraulic fluid |
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Granted publication date: 20200131 |