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Cylinder driving system and energy regenerating method thereof

A drive system and cylinder technology, applied in fluid pressure actuation system components, fluid pressure actuation devices, servo motors, etc., can solve problems such as difficult to achieve effective operation and large energy loss, and achieve simplification of circuit structure and reduction of loss effect

Inactive Publication Date: 2007-03-07
KOMATSU LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the energy loss on the pressure oil control valve 71 is relatively large, and it is also difficult to achieve effective operation by means of the hydraulic cylinder.

Method used

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  • Cylinder driving system and energy regenerating method thereof
  • Cylinder driving system and energy regenerating method thereof
  • Cylinder driving system and energy regenerating method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] In FIG. 2 , a predetermined number (n) of cylinders parallel to the axial direction are formed on a cylinder-shaped cylinder unit 11 , and plungers 12 are installed in each of the cylinders. A predetermined number of outer Po and inner ports Pi communicating with each plunger 12 are formed on the end face of the cylinder unit 11 opposite to the plunger 12 , and the end face is in contact with the valve plate 13 . On the valve plate 13, an arc-shaped long hole 15B serving as a port B is formed on one side centering on the axis, and an arc-shaped long hole 15B serving as a port H is formed in parallel on the other side in the circumferential direction on the outside. 15H and an arc-shaped long hole 15T as the mouth T on its inside, and the above-mentioned long hole 15B communicates with the outer port Po and the inner port Pi respectively, the long hole 15H communicates with the outer port Po, and the long hole 15T communicates with the inner port Port and Pi are connecte...

Embodiment 2

[0068] Hereinafter, Embodiment 2 will be described with reference to FIGS. 6 to 8 . Fig. 6 is a sectional view of the hydraulic pump of Example 2, Fig. 7 is a perspective sectional view of a main part of the same hydraulic pump, and Fig. 8 is a block diagram of a cylinder of the same hydraulic pump.

[0069] In FIG. 6 , the inclined axis pump 30 has a drive shaft 32 rotatably supported in a casing 31 , and a disk is provided at one end of the drive shaft 32 . On the surface of the above-mentioned circular plate 33 opposite to the drive shaft 32, a cylinder rotating shaft 36 is connected between the housing 31, and the axis of the cylinder rotating shaft 36 is relative to the axis of the drive shaft 32, Only set it according to the specified tilt angle θ. One end of the cylinder rotating shaft 36 is connected to the rotation center of the surface of the above-mentioned circular plate 33 , and the other end is rotatably supported by the housing 31 . In addition, the cylinder u...

Embodiment 3

[0076] Hereinafter, Embodiment 3 will be described with reference to FIG. 9 . FIG. 9 is a cross-sectional view of the main part of the cylinder block of the third embodiment.

[0077] In the above-mentioned embodiment 2, in order to adjust the diameter of each cylinder hole 38, the hole diameter itself is processed and adjusted according to the target ratio α, but in this embodiment, the bushing having a predetermined inner diameter according to the target ratio α is processed and adjusted. 39 is inserted into the cylinder bore 38 for adjustment. According to the rough adjustment of the target ratio α, as described in the above-mentioned embodiment 1, it is carried out by adjusting the number nH of cylinders corresponding to the port H and the number nT of cylinders corresponding to the port T, and inserting the sleeve 39 with the adjusted inner diameter into the specified Fine adjustments are made in the cylinder bore 38 .

[0078] As the diameter of the cylinder hole 38, t...

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Abstract

The present invention provided a cylinder drive system and a method for regenerating its energy. The cylinder drive system has the following three intaking and discharging ports, a first port (B) to supply or discharge oil in the bottom chamber of the hydraulic cylinder (3), a second port (H) to discharge or supply the oil in the head chamber, and a third port (T) to discharge or supply the oil in a tank (5). The cylinder drive system is provided with a hydraulic pump (1) in which the intaking amount and the discharging amount of the first port (B) is the sum of each discharging amount and the intaking amount of the second port (H) and the third port (T), and a drive source (2) to drive the hydraulic pump (1). The control of the discharging amount, the intaking amount, and the discharging direction of the hydraulic pump (1) is executed by controlling the number of rotation and the rotation direction of the drive source (2) or by controlling a tilt angle by making the hydraulic pump (1) as a double tilting type. In this invention, a number of hydraulic equipment for absorbing the difference of a flow rate between a head chamber and a bottom chamber of a hydraulic cylinder and the amount of energy loss can be reduced.

Description

technical field [0001] The invention relates to a cylinder drive system and an energy regeneration method thereof. Background technique [0002] In the past, as one of the ways to control the flow rate of hydraulic cylinders that are widely used in construction machinery, work vehicles and industrial machinery, there are widely known ways to control the speed and direction of rotation of hydraulic pumps, and to control the double-tilt type (inclined-axis type, inclined plate type, etc.) (referring to the bilateral discharge type, bidirectional dischargeable) hydraulic pump tilt angle (displacement capacity, displacement) way. [0003] As a conventional technique for controlling the rotation speed and rotation direction of the above-mentioned hydraulic pump, there is, for example, the technique described in International Publication No. WO01 / 88381, and FIG. 13 shows the main part of the drive circuit diagram described in the publication. As shown in Figure 13, the two hydrau...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F15B11/02F15B21/14F15B11/00
Inventor 井上宏昭金山登伊藤光一郎平木彦三郎齐藤秀明
Owner KOMATSU LTD