Device capable of switching variable speed of constant pressure variable pump and variable speed control method
A constant pressure variable pump and variable technology, applied in the field of variable pumps, can solve problems such as damage, and achieve the effects of easy implementation, avoiding damage, and reducing the rate of flow change
Pending Publication Date: 2018-04-13
SHAOYANG VICTOR HYDRAULICS
View PDF10 Cites 2 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
It can effectively solve the technical problem that the constant pressure variable pump is damaged due to frequent and rapid variable changes resulting in high-frequency instantaneous air suction, making the constant pressure variable pump suitable for occasions that require frequent variable changes and expanding the application range of constant pressure variable pumps
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0015] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings.
[0016] like figure 2 The shown device that can switch the variable speed of the constant pressure variable pump includes the constant pressure variable pump 1, the variable cylinder connected with the constant pressure variable pump 1, the pressure compensating valve with the control chamber and the oil inlet connected to the outlet of the constant pressure variable pump 1 2. The rodless chamber 6 of the variable cylinder is connected with the first oil outlet of the pressure compensation valve 2, the rod chamber 7 of the variable cylinder is mechanically connected with the constant pressure variable pump 1, and the first oil outlet of the pressure compensation valve 2 The connecting pipeline between the port and the rodless chamber 6 of the variable cylinder is provided with a speed regulating mechanism 5 that can swit...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention relates to a device capable of switching the variable speed of a constant pressure variable pump and a variable speed control method. The device comprises the constant pressure variablepump (1), a variable cylinder connected with the constant pressure variable pump (1), and a pressure-compensated valve (2) with a control cavity and an oil inlet communicating with an outlet of the constant pressure variable pump. A rodless cavity (6) of a variable cylinder communicates with a first oil outlet of the pressure-compensated valve; a rod cavity of the variable cylinder is mechanicallyconnected with the constant pressure variable pump; a speed governing device (5) capable of switching a hydraulic oil flow is arranged on a communicating pipeline between the first oil outlet of thepressure-compensated valve and the rodless cavity (6) of the variable cylinder; a second damper (3) and a third damper (4) are serially connected between the first oil outlet of the pressure-compensated valve (2) and an oil return tank; and the third damper (4) is arranged between the second oil outlet and the oil return tank. The speed governing device can change the damping of oil inlet and outlet passages of a sensitive cavity of the variable cylinder, so that the variable adjusting time of the constant pressure variable pump is changed, and the constant pressure variable pump is ensured tobe at an optimal working condition.
Description
technical field [0001] The invention relates to the technical field of variable displacement pumps, in particular to a device capable of switching the variable speed of the constant pressure variable pump; the invention also relates to a control method for the variable speed of the constant pressure variable pump. Background technique [0002] With the higher and higher requirements for hydraulic system pressure level and energy-saving performance, variable displacement pumps have been widely used in hydraulic systems. figure 1 Shown is a schematic diagram of the prior art variable pump hydraulic system. The oil pump system includes a variable pump 1', a variable cylinder 2', a pressure compensating valve S and a damper DR, wherein: the variable pump 1' has a pump outlet, and the pump outlet is connected to the control components (not shown). The outlet of the pump is connected to the other two branches L1 and L2, the L1 branch is connected to the control chamber of the pre...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Applications(China)
IPC IPC(8): F15B11/16F15B13/06
CPCF15B11/16F15B13/06F15B2211/20546
Inventor 粟武洪
Owner SHAOYANG VICTOR HYDRAULICS