CN209892554U

CN209892554U - Comprehensive hydraulic test bed

Info

Publication number: CN209892554U
Application number: CN201920521419.XU
Authority: CN
Inventors: 刘立强
Original assignee: Liaoning Fengyuan Mechanical And Electrical Equipment Engineering Co Ltd
Current assignee: Fengyuan (Liaoning) high end equipment manufacturing industry Co.,Ltd.
Priority date: 2019-04-17
Filing date: 2019-04-17
Publication date: 2020-01-03
Anticipated expiration: 2029-04-17

Abstract

The utility model discloses a comprehensive hydraulic test platform, including oil tank, level sensor, air cleaner, high-pressure gear pump, motor, overflow valve, check valve, filter assembly, proportional pressure reducing valve, proportional direction valve, pressure sensor, air cleaner, level sensor all install on the oil tank, the oil-out of overflow valve and high-pressure gear pump all insert the oil tank, the motor is connected with high-pressure gear pump, check valve, filter assembly, proportional pressure reducing valve, proportional direction valve are established ties in proper order, and its series circuit check valve is connected on the return circuit between high-pressure gear pump and overflow valve, and proportional direction valve connects the one end that inserts the oil tank at the overflow valve. Compared with the prior art, the utility model the advantage lie in: the hydraulic power device is convenient to adjust, wide in adjusting range, beneficial to providing hydraulic power with different pressure levels for the tested piece according to different requirements of the tested piece, suitable for various tested pieces and capable of reducing test cost.

Description

Comprehensive hydraulic test bed

Technical Field

The utility model relates to a hydraulic system technical field specifically indicates a generalized type hydraulic test platform.

Background

The hydraulic test bench has the advantages that the hydraulic power with different pressure levels is provided for a tested piece according to different requirements of the tested piece in the hydraulic test process, each tested piece cannot be provided with one set of independent test equipment, the test cost can be greatly increased, and the adjusting range of the existing hydraulic test bench is small.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is to overcome above technical defect, provide a generalized type hydraulic test platform.

In order to solve the technical problem, the utility model provides a technical scheme does: a comprehensive hydraulic test bed comprises an oil tank, a liquid level sensor, an air filter, a high-pressure gear pump, a motor, a pressure gauge I, an overflow valve, a check valve, a filter component, a proportional pressure reducing valve, a proportional direction valve, a pressure sensor and a pressure gauge II, wherein the air filter and the liquid level sensor are both arranged on the oil tank, an oil outlet of the overflow valve and the high-pressure gear pump are both connected into the oil tank, the motor is connected with the high-pressure gear pump, the high-pressure gear pump is connected with the overflow valve in series, the check valve, the filter component, the proportional pressure reducing valve and the proportional direction valve are sequentially connected in series, a series loop check valve is connected onto a loop between the high-pressure gear pump and the overflow valve, the proportional valve is connected onto one end of the overflow valve connected into the oil tank, the pressure gauge I is connected between the high-, the pressure sensor is connected with a pressure gauge II.

Compared with the prior art, the utility model the advantage lie in: the hydraulic power device is convenient to adjust, wide in adjusting range, beneficial to providing hydraulic power with different pressure levels for the tested piece according to different requirements of the tested piece, suitable for various tested pieces and capable of reducing test cost.

Drawings

Fig. 1 is a hydraulic circuit diagram of the comprehensive hydraulic test bed of the utility model.

FIG. 2 is a graph of a proportional pressure reducing valve.

Fig. 3 is a graph of a proportional directional valve.

As shown in the figure: 1. the oil tank, 2, level sensor, 3, air cleaner, 4, high-pressure gear pump, 5, motor, 6, manometer one, 7, overflow valve, 8, check valve, 9, filter component, 10, proportional pressure reducing valve, 11, proportional direction valve, 12, pressure sensor, 13, manometer two.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

With the attached drawings, the comprehensive hydraulic test bed comprises an oil tank 1, a liquid level sensor 2, an air filter 3, a high-pressure gear pump 4, a motor 5, a first pressure gauge 6, an overflow valve 7, a check valve 8, a filter assembly 9, a proportional pressure reducing valve 10, a proportional direction valve 11, a pressure sensor 12 and a second pressure gauge 13, wherein the air filter 3 and the liquid level sensor 2 are both arranged on the oil tank 1, an oil outlet of the overflow valve 7 and the high-pressure gear pump 4 are both connected into the oil tank 1, the motor 5 is connected with the high-pressure gear pump 4, the high-pressure gear pump 4 is connected with the overflow valve 7 in series, the check valve 8, the filter assembly 9, the proportional pressure reducing valve 10 and the proportional direction valve 11 are sequentially connected in series, the check valve 8 of the series circuit is connected on a circuit between the high-pressure gear pump 4 and the overflow, the first pressure gauge 6 is connected between the high-pressure gear pump 4 and the overflow valve 7 and the check valve 8, the second pressure gauge 13 is connected on a loop between the proportional pressure reducing valve 10 and the proportional direction valve 11, and the pressure sensor 12 is connected with the second pressure gauge 13.

The utility model discloses when concrete implementation, hydraulic pressure experimentation often can be different according to the requirement by the test piece, for providing the hydraulic power of different pressure grades by the test piece, figure 1 is hydraulic system's hydraulic circuit diagram, and the pressure point that needs to adjust is the pressure value of A point, and the pressure value of A point is exactly the required pressure value of system. The highest output pressure of the pump is 12MPa, the pressure can be adjusted, and the pressure adjusting value is set to be 0.01MPa (+ -0.01 MPa) -12MPa, and the pressure can be continuously adjusted. 0.01Mpa is 1200/1 of 12Mpa, and if a pressure valve is used for pressure regulation, the control accuracy of the valve is higher than a required accuracy by one accuracy level, that is, one ten thousandth, and the pressure control needs to be responsive in most cases. The current requirements of use are not met by the common commercially available control valves. The curve of the proportional pressure reducing valve 10 is shown in fig. 2. Each proportion regulating valve (positive covering, negative covering and the like) has a certain dead zone, the regulating pressure is not from zero, and the dead zone of the regulating zone causes that the regulating valve cannot meet the continuous high-precision regulating mode and cannot meet the use requirement of a system. In this case, the dead zone regulation is avoided and the pressure is continuously regulated by supplementing with other valves. The proportional directional valve 11 in fig. 1 serves as a bypass flow function in this schematic diagram, and when the pressure is in a small pressure dead zone, the small pressure (dead zone) pressure can be continuously adjusted by controlling the opening degree of the proportional directional valve 11 to adjust the pressure, and the graph is shown in fig. 3.

The specific adjusting process is as follows: the pressure regulation of 0.01-12 MPa is divided into two regions, namely 0.01-0.5MPa and 0.5-12 MPa. When the pressure of the system is adjusted, 0.5Mpa-12Mpa is adjusted through the proportional pressure reducing valve 10, the adjustment interval of the proportional pressure reducing valve 10 is a dead zone at 0.5Mpa at times, continuous adjustment can be carried out, the No. 10 proportional pressure reducing valve 10 is adjusted to the minimum pressure at 0.01-0.5Mpa, the opening degree of the proportional direction valve 11 is adjusted at the moment, and closed-loop adjustment of the pressure can be carried out. When the proportional directional valve 11 is adjusted, the opening degree of the valve is changed, the pressure value at the position A is reduced due to the change of the opening degree, and the required pressure value can be completely adjusted by selecting the accuracy and the measuring range of the proper pressure sensor 12.

The present invention and the embodiments thereof have been described above, but the description is not limited thereto, and the embodiment shown in the drawings is only one of the embodiments of the present invention, and the actual structure is not limited thereto. In summary, those skilled in the art should understand that they should not be limited to the embodiments described above, and that they can design the similar structure and embodiments without departing from the spirit of the invention.

Claims

1. The utility model provides a generalized type hydraulic test platform, includes oil tank (1), high-pressure gear pump (4), motor (5), manometer one (6), overflow valve (7), check valve (8), its characterized in that: the oil-saving type hydraulic pump further comprises a liquid level sensor (2), an air filter (3), a filter assembly (9), a proportional pressure reducing valve (10), a proportional direction valve (11), a pressure sensor (12) and a pressure gauge II (13), wherein the air filter (3) and the liquid level sensor (2) are both installed on the oil tank (1), the oil outlet of the overflow valve (7) and the high-pressure gear pump (4) are both connected into the oil tank (1), the motor (5) is connected with the high-pressure gear pump (4), the high-pressure gear pump (4) is connected with the overflow valve (7) in series, the check valve (8), the filter assembly (9), the proportional pressure reducing valve (10) and the proportional direction valve (11) are sequentially connected in series, the series circuit check valve (8) is connected on a circuit between the high-pressure gear pump (4) and the overflow valve (7), and the proportional direction valve (11), the pressure gauge I (6) is connected between the high-pressure gear pump (4) and the overflow valve (7) and the one-way valve (8), the pressure gauge II (13) is connected on a loop between the proportional pressure reducing valve (10) and the proportional direction valve (11), and the pressure sensor (12) is connected with the pressure gauge II (13).