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Four-quadrant hydraulic loading system

A hydraulic loading, four-quadrant technology, used in fluid pressure actuation system components, fluid pressure actuation devices, servo motors, etc. Pressure rise and other problems to achieve the effect of reducing rated flow, avoiding pressure overshoot and improving stability

Inactive Publication Date: 2017-10-20
SOUTHWEST JIAOTONG UNIV
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the hydraulic oil source of the test system supplies oil to the tested motor, the opening of the orifice is reduced, and the back pressure of the motor increases, which will also cause the pressure of the oil inlet of the motor to increase.
This method is not very safe

Method used

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  • Four-quadrant hydraulic loading system

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Embodiment Construction

[0027] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments. Such as figure 1 As shown, a four-quadrant hydraulic loading system includes a variable hydraulic pump / motor 11, a manual reversing valve 10, a three-position four-way electromagnetic reversing valve 8, a pilot-operated proportional electromagnetic relief valve 7, and a pilot-operated pressure reducing valve 18;

[0028] The variable hydraulic pump / motor 11 is driven by the system under test 22 through the clutch 12, its A port is connected to the T port of the manual reversing valve 10, and its B port is connected to the P port of the manual reversing valve 10;

[0029] Port A of the manual reversing valve 10 is connected to port B of the three-position four-way electromagnetic reversing valve 8, and its B port is simultaneously connected to port A of the three-position four-way electromagnetic reversing valve 8 and the pilot proporti...

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Abstract

The invention discloses a four-quadrant hydraulic loading system. A port A and a port B of a volume adjustable hydraulic pump / motor are separately connected to a port T and a port P of a manual reversing valve; a port A and a port B of the manual reversing valve are separately connected to a port A and a port B of a three-position four-way electromagnetic reversing valve, and the port B of the manual reversing valve is also connected to a port P of a pilot proportional electromagnetic overflow valve; a port A of the pilot proportional electromagnetic overflow valve is successively connected to a port P of the three-position four-way electromagnetic reversing valve through a cooler and a filter; a port T of the three-position four-way electromagnetic reversing valve is connected to a port A of a pilot pressure reducing valve and a port AA of a first one-way valve; a port P of the pilot pressure reducing valve and a port P of the first one-way valve are connected to an energy accumulator through a manual stop valve; and the port P of the three-position four-way electromagnetic reversing valve is successively connected to a fuel tank through a second one-way valve and a hydraulic pump. The four-quadrant hydraulic loading system disclosed by the invention adopts a closed hydraulic system and has the characteristics of high efficiency and high power density, and the closed system has the advantages of small size, small occupied area and low cost.

Description

technical field [0001] The invention relates to the technical field of hydraulic transmission and control, in particular to a four-quadrant hydraulic loading system. Background technique [0002] The hydraulic motor is an executive component of the hydraulic system and the core component of the hydraulic system. Its performance will directly affect and determine the working performance of the hydraulic system, so it is particularly important to perform performance tests on the hydraulic motor. [0003] There are currently three loading methods for hydraulic motor performance tests: [0004] The first is the mechanical loading method, including friction dynamometer loading, torsion plate spring loading, and inertial disk loading. These methods are generally simple and easy to implement, but due to various restrictions, they are not suitable for high power situations, so they are not suitable for hydraulic motor tests for construction machinery hydraulic transmission. The me...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F15B13/02F15B11/08F15B21/08
CPCF15B11/08F15B13/02F15B21/08
Inventor 刘桓龙蒋越
Owner SOUTHWEST JIAOTONG UNIV
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