CN107401535B - Hydraulic motor test bed - Google Patents
Hydraulic motor test bed Download PDFInfo
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- CN107401535B CN107401535B CN201710624289.8A CN201710624289A CN107401535B CN 107401535 B CN107401535 B CN 107401535B CN 201710624289 A CN201710624289 A CN 201710624289A CN 107401535 B CN107401535 B CN 107401535B
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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
- F15B19/00—Testing; Calibrating; Fault detection or monitoring; Simulation or modelling of fluid-pressure systems or apparatus not otherwise provided for
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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
- F15B2211/00—Circuits for servomotor systems
- F15B2211/80—Other types of control related to particular problems or conditions
- F15B2211/855—Testing of fluid pressure systems
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- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
The invention discloses a hydraulic motor test bed, which comprises a main oil pump, a tested hydraulic motor, a speed reducer, a loading hydraulic motor, a power recovery motor, a main oil way and a power recovery oil way, wherein the main oil pump is connected with the speed reducer through the main oil way; the tested hydraulic motor, the speed reducing device and the loading hydraulic motor are sequentially and rigidly connected; the power recovery motor is also rigidly connected with the main oil pump; the main oil circuit comprises the main oil pump, a main oil circuit bridge type loop and the tested hydraulic motor; the power recovery oil circuit comprises the loading hydraulic motor, a power recovery bridge circuit and the power recovery motor. The invention can realize the performance and service life test of the hydraulic motor, simulate the load by using the loading hydraulic motor, and recycle part of power by using the power recycling oil circuit to drive the main oil pump, thereby avoiding the waste of energy and having the advantages of energy conservation and emission reduction.
Description
Technical Field
The invention belongs to the technical field of hydraulic equipment testing, and particularly relates to a hydraulic motor test bed.
Background
After the hydraulic motor is manufactured, the service life of the hydraulic motor under the industrial control conditions such as specified pressure, rotation speed and the like needs to be detected, and therefore a test bed is needed to test the hydraulic motor. In the conventional hydraulic motor test stand, the load was simulated by using a proportional relief valve. However, with the test, the proportional overflow valve generates heat to cause the temperature of the oil to rise, that is, most of energy is converted into heat energy by the proportional overflow valve in the test process, so that the energy is wasted, that is, the existing hydraulic motor test bed is not energy-saving enough, and the energy waste is relatively large.
Disclosure of Invention
The invention aims to solve the technical problem of providing an energy-saving and emission-reducing hydraulic motor test bed.
In order to solve the technical problems, the invention adopts the following technical scheme:
a hydraulic motor test bench, its characterized in that: the device comprises a main oil pump, a tested hydraulic motor, a speed reducing device, a loading hydraulic motor, a power recovery motor, a main oil way and a power recovery oil way;
the tested hydraulic motor, the speed reducing device and the loading hydraulic motor are sequentially and rigidly connected; the power recovery motor is also rigidly connected with the main oil pump;
the main oil circuit comprises the main oil pump, a main oil circuit bridge type loop and the tested hydraulic motor;
the main oil circuit bridge type loop is formed by connecting a first hydraulic control one-way valve, a second hydraulic control one-way valve, a third hydraulic control one-way valve and a fourth hydraulic control one-way valve in series, a main oil circuit first node is arranged between the first hydraulic control one-way valve and the second hydraulic control one-way valve, a main oil circuit second node is arranged between the second hydraulic control one-way valve and the third hydraulic control one-way valve, a main oil circuit third node is arranged between the third hydraulic control one-way valve and the fourth hydraulic control one-way valve, and a main oil circuit fourth node is arranged between the fourth hydraulic control one-way valve and the first hydraulic control one-way valve;
the oil outlet of the main oil pump is connected to a first node of a main oil way of the main oil way bridge circuit, a second node of the main oil way bridge circuit is connected to an oil inlet of the tested hydraulic motor, the oil outlet of the tested hydraulic motor is connected to a fourth node of the main oil way bridge circuit, and a third node of the main oil way bridge circuit is connected to an oil inlet of the main oil pump;
the power recovery oil circuit comprises the loading hydraulic motor, a power recovery bridge circuit and the power recovery motor;
the power recovery bridge type loop is formed by connecting a fifth hydraulic control one-way valve, a sixth hydraulic control one-way valve, a seventh hydraulic control one-way valve and an eighth hydraulic control one-way valve in series; a recovery first node is arranged between the fifth hydraulic control check valve and the sixth hydraulic control check valve, a recovery second node is arranged between the sixth hydraulic control check valve and the seventh hydraulic control check valve, a recovery third node is arranged between the seventh hydraulic control check valve and the eighth hydraulic control check valve, and a recovery fourth node is arranged between the eighth hydraulic control check valve and the fifth hydraulic control check valve;
the oil outlet of the loading hydraulic motor is connected to the recovery fourth node of the power recovery bridge circuit, the recovery third node of the power recovery bridge circuit is connected to the oil inlet of the power recovery motor, the oil outlet of the power recovery motor is connected to the recovery first node of the power recovery bridge circuit, and the recovery second node of the power recovery bridge circuit is connected to the oil inlet of the loading hydraulic motor.
By adopting the technical scheme, the performance and the service life of the hydraulic motor can be tested, the load is simulated by using the loading hydraulic motor, and partial power is recycled by using the power recycling oil way to drive the main oil pump, so that the energy waste is avoided, and the hydraulic motor has the advantages of energy conservation and emission reduction.
Drawings
Fig. 1 is a diagram of a hydraulic system of the present invention.
Detailed Description
As shown in fig. 1, the hydraulic motor test stand of the present invention includes a main oil pump 33, a hydraulic motor 69 to be tested, a speed reducing device, a loading hydraulic motor 64, a power recovery motor 38, a main oil passage, a power recovery oil passage, an oil supplementing passage, and a bridge control oil passage. The speed reducer is formed by connecting a first speed reducer 67.2 and a second speed reducer 67.1 in series.
The main oil path is a closed circulation oil path, and includes a main oil pump 33, a main oil path bridge circuit, and a hydraulic motor 69 to be tested. The oil outlet of the main oil pump 33 is connected to the oil inlet of the tested hydraulic motor 69 via a main oil path bridge circuit 33.1, and the oil outlet of the tested hydraulic motor 69 is connected to the oil inlet of the main oil pump 33 via a main oil path bridge circuit.
The main oil circuit bridge type loop is formed by serially connecting a first hydraulic control check valve 44.5, a second hydraulic control check valve 44.6, a third hydraulic control check valve 44.7 and a fourth hydraulic control check valve 44.8, wherein a first node of a main oil circuit is arranged between the first hydraulic control check valve 44.5 and the second hydraulic control check valve 44.6, a second node of the main oil circuit is arranged between the second hydraulic control check valve 44.6 and the third hydraulic control check valve 44.7, a third node of the main oil circuit is arranged between the third hydraulic control check valve 44.7 and the fourth hydraulic control check valve 44.8, and a fourth node of the main oil circuit is arranged between the fourth hydraulic control check valve 44.8 and the first hydraulic control check valve 44.5. The first hydraulic control check valve 44.5, the second hydraulic control check valve 44.6, the third hydraulic control check valve 44.7 and the fourth hydraulic control check valve 44.8 are respectively controlled to be opened and closed by a two-position four-way electromagnetic reversing valve.
Specifically, the oil outlet of the main oil pump 33 is connected to the main oil passage first node of the main oil passage bridge circuit, the main oil passage second node of the main oil passage bridge circuit is connected to the oil inlet of the hydraulic motor 69 to be measured, the oil outlet of the hydraulic motor 69 to be measured is connected to the main oil passage fourth node of the main oil passage bridge circuit, and the main oil passage third node of the main oil passage bridge circuit is connected to the oil inlet of the main oil pump 33.
Therefore, the main oil path is divided into four sections, namely, the oil path between the oil outlet of the main oil pump 33 and the first node of the main oil path bridge circuit is the first main oil path section 101, the oil path between the second node of the main oil path bridge circuit and the oil inlet of the tested hydraulic motor 69 is the second main oil path section 102, the oil path between the oil outlet of the tested hydraulic motor and the fourth node of the main oil path bridge circuit is the third main oil path section 103, and the oil path between the third node of the main oil path bridge circuit and the oil inlet of the main oil pump 33 is the fourth main oil path section 104.
The tested hydraulic motor 69, the first speed reducer 67.2, the second speed reducer 67.1 and the loading hydraulic motor 64 are rigidly connected in sequence. The power recovery motor 38 is also rigidly coupled to the main oil pump 33.
The power recovery circuit is also a closed circuit including the charge hydraulic motor 64, the power recovery bridge circuit, and the power recovery motor 38. The oil outlet of the loading hydraulic motor 64 is connected to the oil inlet of the power recovery motor 38 via a power recovery bridge circuit 64.1, and the oil outlet of the power recovery motor 38 is connected to the oil inlet of the loading hydraulic motor 64 via a power recovery bridge circuit 64.1.
The power recovery bridge circuit 64.1 is formed by serially connecting a fifth pilot operated check valve 44.1, a sixth pilot operated check valve 44.2, a seventh pilot operated check valve 44.3 and an eighth pilot operated check valve 44.4. There is a recovery first node between the fifth pilot operated check valve 44.1 and the sixth pilot operated check valve 44.2, a recovery second node between the sixth pilot operated check valve 44.2 and the seventh pilot operated check valve 44.3, a recovery third node between the seventh pilot operated check valve 44.3 and the eighth pilot operated check valve 44.4, and a recovery fourth node between the eighth pilot operated check valve 44.4 and the fifth pilot operated check valve 44.1. The fifth pilot operated check valve 44.1, the sixth pilot operated check valve 44.2, the seventh pilot operated check valve 44.3 and the eighth pilot operated check valve 44.4 are also controlled to open and close by a two-position four-way electromagnetic directional valve respectively.
Specifically, the oil outlet of the charge hydraulic motor 64 is connected to the recovery fourth node of the power recovery bridge circuit, the recovery third node of the power recovery bridge circuit is connected to the oil inlet of the power recovery motor 38, the oil outlet of the power recovery motor 38 is connected to the recovery first node of the power recovery bridge circuit, and the recovery second node of the power recovery bridge circuit is connected to the oil inlet of the charge hydraulic motor 64.
Therefore, the power recovery oil path is also divided into four sections, namely, the oil path between the oil outlet of the loading hydraulic motor 64 and the recovery fourth node of the power recovery bridge circuit is a first recovery oil path section 201, the oil path between the recovery third node of the power recovery bridge circuit and the oil inlet of the power recovery motor 38 is a second recovery oil path section 202, the oil path between the oil outlet of the power recovery motor 38 and the recovery first node of the power recovery bridge circuit is a third recovery oil path section 203, and the fourth recovery oil path section 204 of the oil path between the recovery second node of the power recovery bridge circuit and the oil inlet of the loading hydraulic motor 64.
The oil supplementing path comprises an oil supplementing pump 6, an oil supplementing filter 12, a main oil supplementing bridge type loop and a loading oil supplementing bridge type loop.
The main oil compensating bridge circuit is formed by connecting a first check valve 26.1, a second check valve 26.2, a third check valve 26.3 and a fourth check valve 26.4 in series to form a closed loop. A first node for main oil compensation is arranged between the first check valve 26.1 and the second check valve 26.2, a second node for main oil compensation is arranged between the second check valve 26.2 and the third check valve 26.3, a third node for main oil compensation is arranged between the third check valve 26.3 and the fourth check valve 26.4, and a fourth node for main oil compensation is arranged between the fourth check valve 26.4 and the first check valve 26.1.
A first proportional relief valve 27.1 is connected between the main oil-compensating second node and the main oil-compensating fourth node.
The loading oil supplementing bridge circuit is formed by connecting a fifth one-way valve 26.5, a sixth one-way valve 26.6, a seventh one-way valve 26.7 and an eighth one-way valve 26.8 in series to form a closed loop. A first node for filling oil is arranged between the fifth one-way valve 26.5 and the sixth one-way valve 26.6, a second node for filling oil is arranged between the sixth one-way valve 26.6 and the seventh one-way valve 26.7, a third node for filling oil is arranged between the seventh one-way valve 26.7 and the eighth one-way valve 26.8, and a fourth node for filling oil is arranged between the eighth one-way valve 26.8 and the fifth one-way valve 26.5.
A second proportional relief valve 27.2 is connected between the second and fourth load make-up nodes.
The main oil-supplementing bridge type loop and the loading oil-supplementing bridge type loop have the function of automatically selecting the trend of an oil way, an oil pressure safety value is set for the proportional overflow valve, when the hydraulic pressure on one side is too high and exceeds the oil pressure safety value set by the proportional overflow valve, the proportional hydraulic valve is opened, the bridge type loop is conducted, hydraulic oil is directly released to the other side, and pressure relief is achieved to achieve safety protection.
The oil supplementing pump 6 is driven by a motor to work. The oil inlet of the oil supplementing pump 6 is connected to the main oil tank 1 through a ball valve, the oil outlet is connected to the oil supplementing filter 12 through an oil supplementing main one-way valve 11, and the oil supplementing filter 12 is simultaneously connected to an oil supplementing first one-way valve 25.1, an oil supplementing second one-way valve 25.2, an oil supplementing third one-way valve 25.3, an oil supplementing fourth one-way valve 25.4 and an oil supplementing main overflow valve 17. The main relief valve 17 is connected back to the main tank 1. The oil-supplementing main overflow valve 17 can protect an oil path, and when the oil pressure in the oil path is higher than the oil-supplementing main overflow valve 17, the oil-supplementing main overflow valve 17 is opened to release pressure to the oil path.
The first oil compensating check valve 25.1 is then simultaneously connected to the third main oil compensating node and the fourth main oil section 104, the second oil compensating check valve 25.2 is simultaneously connected to the first main oil compensating node and the first main oil path section 101, the third oil compensating check valve 25.3 is simultaneously connected to the third loading oil compensating node and the fourth recovery oil section 204, and the fourth oil compensating check valve 25.4 is simultaneously connected to the first loading oil compensating node and the first recovery oil section 201.
The bridge circuit control oil path includes a control oil pump 48 and a control filter 47. The control oil pump 48 is driven by a motor, an oil inlet of the control oil pump 48 is connected with the main oil tank 1 through a ball valve, an oil outlet of the control oil pump 48 is connected with a control filter 47, and the control filter 47 is respectively connected with each two-position four-way electromagnetic reversing valve in a main oil way bridge type loop and a power recovery bridge type loop through a control one-way valve 46. Through the bridge circuit control oil circuit, the opening and closing of each hydraulic control one-way valve in the main oil circuit bridge circuit and the power recovery bridge circuit can be controlled, so that the flow direction of hydraulic oil is controlled.
The working mode of the hydraulic motor test bed is as follows:
firstly, the oil supplementing pump 6 is started, and the first oil supplementing one-way valve 25.1, the second oil supplementing one-way valve 25.2, the third oil supplementing one-way valve 25.3 and the fourth oil supplementing one-way valve 25.4 are opened to supply oil to the main oil way and the power recovery oil way through the oil supplementing filter 12.
When the main oil path and the power recovery oil path reach preset pressure values, the main oil pump 33 is started, hydraulic oil from the oil outlet of the main oil pump 33 drives the tested hydraulic motor 69 to rotate through a main oil path bridge circuit, and the hydraulic oil returns to the oil inlet of the main oil pump 33 through the main oil path bridge circuit to form closed circulation.
The tested hydraulic motor 69 drives the first speed reducer 67.2 and further drives the second speed reducer 67.1 to rotate, the second speed reducer drives the loading hydraulic motor 64 to rotate, hydraulic oil drives the power recovery motor 38 through the power recovery bridge circuit, and the purpose that part of power of the main oil pump drives the power recovery motor 38 is achieved through rigid connection of the power recovery motor 38 and the main oil pump 33, so that the purpose of power recovery is achieved.
Meanwhile, the set pressure of the second proportional overflow valve 27.2 can be adjusted by adjusting the displacement of the power recovery motor 38 and matching the proportion, so that the effects of realizing power recovery and realizing proportional loading required by a test can be achieved.
If the hydraulic oil is reduced and the pressure is insufficient due to leakage in the main oil way and the power recovery oil way, the oil supplementing way can supplement oil in the main oil way and the power recovery oil way so as to meet the running requirement of a system.
Through the bridge circuit control oil circuit, the opening and closing of each hydraulic control one-way valve in the main oil circuit bridge circuit and the power recovery bridge circuit can be controlled, so that the flow direction of hydraulic oil is controlled.
In the hydraulic system of the invention, pressure gauges and pressure sensors are respectively distributed at each monitoring point.
According to the invention, the performance and the service life of the hydraulic motor can be tested, the load is simulated by using the loading hydraulic motor, and part of power is recycled by using the power recycling oil circuit to drive the main oil pump, so that the energy waste is avoided, and the hydraulic motor has the advantages of energy conservation and emission reduction.
However, it will be appreciated by persons skilled in the art that the above embodiments are provided for illustration of the invention and not for limitation thereof, and that changes and modifications to the above described embodiments are intended to fall within the scope of the appended claims as long as they fall within the true spirit of the invention.
Claims (3)
1. A hydraulic motor test bench, its characterized in that: the device comprises a main oil pump, a tested hydraulic motor, a speed reducing device, a loading hydraulic motor, a power recovery motor, a main oil way and a power recovery oil way;
the tested hydraulic motor, the speed reducing device and the loading hydraulic motor are sequentially and rigidly connected; the power recovery motor is also rigidly connected with the main oil pump;
the main oil circuit comprises the main oil pump, a main oil circuit bridge type loop and the tested hydraulic motor;
the main oil circuit bridge type loop is formed by connecting a first hydraulic control one-way valve, a second hydraulic control one-way valve, a third hydraulic control one-way valve and a fourth hydraulic control one-way valve in series, a main oil circuit first node is arranged between the first hydraulic control one-way valve and the second hydraulic control one-way valve, a main oil circuit second node is arranged between the second hydraulic control one-way valve and the third hydraulic control one-way valve, a main oil circuit third node is arranged between the third hydraulic control one-way valve and the fourth hydraulic control one-way valve, and a main oil circuit fourth node is arranged between the fourth hydraulic control one-way valve and the first hydraulic control one-way valve;
the oil outlet of the main oil pump is connected to a first node of a main oil way of the main oil way bridge circuit, a second node of the main oil way bridge circuit is connected to an oil inlet of the tested hydraulic motor, the oil outlet of the tested hydraulic motor is connected to a fourth node of the main oil way bridge circuit, and a third node of the main oil way bridge circuit is connected to an oil inlet of the main oil pump;
the power recovery oil circuit comprises the loading hydraulic motor, a power recovery bridge circuit and the power recovery motor;
the power recovery bridge type loop is formed by connecting a fifth hydraulic control one-way valve, a sixth hydraulic control one-way valve, a seventh hydraulic control one-way valve and an eighth hydraulic control one-way valve in series; a recovery first node is arranged between the fifth hydraulic control check valve and the sixth hydraulic control check valve, a recovery second node is arranged between the sixth hydraulic control check valve and the seventh hydraulic control check valve, a recovery third node is arranged between the seventh hydraulic control check valve and the eighth hydraulic control check valve, and a recovery fourth node is arranged between the eighth hydraulic control check valve and the fifth hydraulic control check valve;
the oil outlet of the loading hydraulic motor is connected to the recovery fourth node of the power recovery bridge circuit, the recovery third node of the power recovery bridge circuit is connected to the oil inlet of the power recovery motor, the oil outlet of the power recovery motor is connected to the recovery first node of the power recovery bridge circuit, and the recovery second node of the power recovery bridge circuit is connected to the oil inlet of the loading hydraulic motor.
2. The hydraulic motor test stand of claim 1, wherein: the first hydraulic control check valve, the second hydraulic control check valve, the third hydraulic control check valve, the fourth hydraulic control check valve, the fifth hydraulic control check valve, the sixth hydraulic control check valve, the seventh hydraulic control check valve and the eighth hydraulic control check valve are respectively controlled by a two-position four-way electromagnetic reversing valve.
3. The hydraulic motor test stand of claim 2, wherein: the device also comprises a control oil pump and a control filter; the oil inlet of the control oil pump is connected with the main oil tank through a ball valve, the oil outlet of the control oil pump is connected with the control filter, and the control filter is respectively connected with each two-position four-way electromagnetic reversing valve in the main oil circuit bridge type loop and the power recovery bridge type loop through a control one-way valve.
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| CN201710624289.8A CN107401535B (en) | 2017-07-27 | 2017-07-27 | Hydraulic motor test bed |
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| CN201710624289.8A CN107401535B (en) | 2017-07-27 | 2017-07-27 | Hydraulic motor test bed |
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| CN107401535A CN107401535A (en) | 2017-11-28 |
| CN107401535B true CN107401535B (en) | 2023-05-05 |
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Families Citing this family (1)
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| CN108240372A (en) * | 2018-01-03 | 2018-07-03 | 广西柳工机械股份有限公司 | Gear closed loop load test system |
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| CN207033889U (en) * | 2017-07-27 | 2018-02-23 | 上海电气液压气动有限公司 | Hydraulic motor test stand |
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2017
- 2017-07-27 CN CN201710624289.8A patent/CN107401535B/en active Active
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| CN201433884Y (en) * | 2009-07-07 | 2010-03-31 | 中国矿业大学 | Emulsion pump testing system |
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