A sprayer boom ground profiling hydraulic system with a dynamic pressure feedback device
A dynamic pressure feedback, hydraulic system technology, applied in the field of hydraulic system, can solve the problems of aggravated boom vibration, load pressure oscillation, weak damping, etc., and achieve the effects of improving spray quality, reducing boom vibration, and reducing energy loss.
Inactive Publication Date: 2017-11-14
CHINA AGRI UNIV
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Problems solved by technology
However, the expanded boom structure has the characteristics of large span, low rigidity, and weak damping. It is a typical flexible structure, and it is easy to generate vibration when adjusting the ground profiling attitude, which will cause the load pressure oscillation of the ground profiling hydraulic system of the spray boom.
However, the existing spray boom ground profiling hydraulic system is not equipped with a dynamic pressure feedback device, the system is in an under-damped state, and the load pressure oscillation cannot be well eliminated, further aggravating the vibration of the spray boom, and ultimately affecting the spraying accuracy
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[0036] The present invention is further described below in conjunction with embodiment.
[0037] Such as figure 1 As shown, the ground profiling hydraulic system of sprayer boom with dynamic pressure feedback device of the present invention comprises left boom profiling hydraulic unit 15, right boom profiling hydraulic unit 16, hydraulic pump 2 and differential pressure overflow flow valve 3.
[0038] The left spray boom profiling hydraulic unit 15 and the right spray boom profiling hydraulic unit 16 have the same component composition and connection circuit, both of which include the first load pressure sensing check valve 6, speed control circuit and dynamic pressure feedback device.
[0039] The speed control circuit includes an orifice 5, a two-way proportional electromagnetic reversing valve 7, a hydraulic control check valve 8 and a one-way throttle valve 9; wherein,
[0040] The two-way proportional electromagnetic reversing valve 7 is a three-position five-way valve...
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The invention relates to a sprayer spraying rod ground profiling hydraulic system with dynamic pressure feedback devices. The hydraulic system comprises a left spraying rod profiling hydraulic unit (15), a right spraying rod profiling hydraulic unit (16), a hydraulic pump (2) and a differential pressure type overflow valve (3). The left spraying rod profiling hydraulic unit and the right spraying rod profiling hydraulic unit are composed of the same components and provided with the same connecting loops. Each of the left spraying rod profiling hydraulic unit and the right spraying rod profiling hydraulic unit comprises a first load pressure sensing one-way valve (6), a speed control loop and the corresponding dynamic pressure feedback device. Each speed control loop comprises a throttling hole (5), a both-way proportional electromagnetic reversing valve (7), a hydraulic control one-way valve (8) and a one-way throttling valve (9). Each dynamic pressure feedback device comprises a throttling valve (10) and an energy accumulator (11). A control oil path of the differential pressure type overflow valve (3) is connected with the two first load pressure sensing one-way valves (6), and a load feedback loop is formed. The sprayer spraying rod ground profiling hydraulic system can effectively absorb pressure impacts and filter out load pressure vibration of the system, vibration of spraying rods is reduced, and the pesticide spraying precision is improved.
Description
technical field [0001] The invention relates to a hydraulic system, in particular to a ground profiling hydraulic system for a spray rod of a sprayer with a dynamic pressure feedback device. Background technique [0002] The high clearance boom sprayer has been widely used due to its advantages of high efficiency, environmental protection and intelligence. The boom ground profiling system ensures that the height of the boom from the ground does not change with the terrain fluctuations, greatly improving the spraying accuracy, and has become an important development direction of the boom sprayer. However, the expanded boom structure has the characteristics of large span, low stiffness, and weak damping. It is a typical flexible structure. It is easy to generate vibration when adjusting the ground profiling attitude, which will cause the load pressure oscillation of the ground profiling hydraulic system of the spray boom. However, the existing spray boom ground profiling hydr...
Claims
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IPC IPC(8): F15B11/08F15B13/02F15B1/02
CPCF15B1/02F15B11/08F15B13/02F15B13/025
Inventor 杜岳峰薛涛毛恩荣朱忠祥
Owner CHINA AGRI UNIV