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Piston pump

A kind of piston pump and piston technology, which is applied in the direction of piston pump, pump, liquid variable capacity machine, etc., can solve the problems of difficult control of the pump and its mechanism, leakage of closing valve, etc.

Inactive Publication Date: 2008-07-30
格哈德·温尼格
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It is difficult to say whether these proposals actually find a way to go, because the small suction pressure at the inlet valve or its piston force cannot maintain the higher delivery pressure of the pump through the connected piston of the closing valve, so the closing valve will leak
Also this proposal has many sealing points which combined make the pump and its mechanism difficult to control

Method used

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  • Piston pump
  • Piston pump

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0010] Fig. 1 shows a pump housing 1, 2, 3 with a pump cylinder 5. A pump piston 4 sealed with an O-ring 6 and a piston rod 7 move in the pump cylinder. The piston rod 7 passes through the pump housing and the valve cover 8 with its end facing away from the piston 4 in a sealed manner via an O-ring 6 and a sealing packing 9, and is movably connected to the delivery lever 25. The delivery lever 25 is connected with the first arm rod 19, one end of the equal arm rod is lengthened and the valve rods 11 and 15 are movably connected with the delivery lever 25 through a connecting plate 22. The conveying lever 25 is rotatably supported by sliding sleeves 23, 26, 27, and is connected to the driving lever 31 via a driving rod 28. A hole system is formed in the middle of the driving lever 31, so that the delivery lever 25 can use a pull-out pin 32 to change its point of action. Thus, the stroke of the piston 4 can be increased or decreased. One end of the driving lever 31 is connected to t...

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PUM

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Abstract

The invention relates to a piston pump whose piston (4), via its upper and lower piston faces, delimits the working space inside the pump cylinder (5) on both sides. The working space (c) is joined via a lever system (19, 22, 25, 28, 31) to two force-guided inlet valves (14, 16) and two force-guided outlet valves (10, 12) that each alternately open and close for filling or discharging the working volume upon reaching both final positions of the piston. An additional working volume, which is reduced by the volume portion of the piston rod, is obtained by the piston being acted upon twice per working stroke as described by the invention thus nearly doubling the efficiency and resulting in a delivery flow with few pulsations. A small residual pulsation remains only from the short period of time during which the valves change from open to closed upon reaching both end positions of the piston inside the cylinder. According to the invention, the design of the piston pump makes it possible for two or more piston pumps to be synchronously operated by coupling their drive levers (31, 40) to a common piston rod (35) and that, in doing this, different stroke lengths can be set by modifying the lever ratios.

Description

Technical field [0001] The invention relates to a piston pump, which has a pump housing and a piston. The piston reciprocates in a pump cylinder to define a working chamber. The invention particularly relates to a piston pump used for conveying and metering different types of liquid media. Background technique [0002] Many piston pumps with different structural solutions are known and used for extremely different conveying and driving tasks (hydraulic devices). The piston pump known from process technology uses only one end face of the piston to fill and discharge the conveying medium. This produces undesirable volatility, which is sinusoidal in the case of crank transmission for suction and working stroke, which brings its effect on the holding pressure height NPSH (Net Positive Inlet Head) and cavitation. The unfavorable consequences. In addition, in this piston pump, the valve operation is completely automatic, that is, the suction negative pressure or the working stroke pres...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F04B5/02F04B7/00
CPCF04B7/0053
Inventor 格哈德·温尼格
Owner 格哈德·温尼格