CN87216191U

CN87216191U - Pulsation eliminater of liquid pressure

Info

Publication number: CN87216191U
Application number: CN 87216191
Authority: CN
Inventors: 李昌琪; 林从滋; 齐旭
Original assignee: MACHINE BUILDING ADMINISTRATION COLLEGE BEIJING
Current assignee: MACHINE BUILDING ADMINISTRATION COLLEGE BEIJING
Priority date: 1987-12-11
Filing date: 1987-12-11
Publication date: 1988-07-27

Abstract

The utility model relates to a device for influencing liquid flow, particularly a liquid pressure pulsation eliminator which is composed of a liquid input jet pipe, a round box form liquid cavity and a liquid output jet pipe. After passing through the input jet pipe and flowing into the round box form liquid cavity, the liquid rotates with high speed along the inner wall of the round box form cavity and at last is spouted from the liquid output jet pipe which is communicated with the center of a circle of a lateral plane of the round box form liquid cavity. The utility model has the advantages of simple structure, easy fabrication, low cost and long service life, and has obvious effect in eliminating liquid pressure pulsation of frequency from above 50 hz to 500 hz. The utility model can be used for variety of liquids, which comprises mud, and can not be blocked. Moreover, the pressure loss is small.

Description

Pulsation eliminater of liquid pressure

The utility model relates to a kind of device that influences flow of fluid, particularly fluid pressure pulsation dampener.

In hydraulic system, how to eliminate fluid pressure pulsation, be that many industrial departments all need the problem that solves, particularly at precision machine tool, equipment, departments such as oil and geological drilling, more urgent.This is because pressure pulsation may influence machining accuracy, causes judder, shortens life of equipment, increases equipment manufacturing cost, even can cause liquid conducting pipes to break.At present, generally be to adopt bag type accumulator to absorb pulsation, but leather bag damage easily, the life-span is low, needs often to replenish nitrogen during work, so the cost height, maintenance is complicated, efficient is not ideal enough.

U.S. Pat 3731709 and China patent CN86201759 to existing fluid pressure pulsation cancellation element, improve to some extent, and have enlarged the Applicable scope of fluid pressure ripple frequency, have prolonged working life, but have yet all had some problems.As structure all more complicated, manufacture cost height; The liquid aperture of all will flowing through is used for slurry conveyed then to stop up easily; The multistage that itself just belongs to that has is eliminated the device that fluid pressure is pulsed, and after liquid passed through, its pressure loss also must strengthen, so also desirable not enough.

The purpose of this utility model, a kind of improved fluid pressure pulsation dampener will be provided exactly, it is not only simple in structure, and is easy to manufacture, and cost is low, after life-span length and the flow of liquid, the pressure loss is little, applicable liquid pressure pulsation wide frequency range, and can be used for various different liquids, comprise mud, can blockage phenomenon yet.

The purpose of this utility model, be achieved in that liquid imported jet pipe that be communicated with in the round case type container edge as liquid reservoir, liquid is exported jet pipe, connection is at the circle centre position of this container, and the axis of input output jet pipe point-blank and does not spatially intersect at a certain angle.This device is connected in the liquid transmission pipeline, after liquid is exported from oil hydraulic pump, spray in the container through the input jet pipe, promptly in container along container rim inwall high speed rotating, then from output jet pipe ejection at the circle centre position of container one side plane.

Concrete structure of the present utility model is provided by following examples and accompanying drawing thereof:

Fig. 1 is B-B generalized section of the present utility model

Wherein 1---housing 2---end cap 4---output jet pipe 5---weld seam

Fig. 2 is A-A generalized section of the present utility model

Wherein 3---import jet pipe 1---housing 5---weld seams

Fig. 3 is ripple frequency f=5Hz(hertz) time input, delivery pressure pulsation amplitude contrast figure, wherein abscissa is the time, y coordinate is respectively input, the delivery pressure amplitude of pulsing, and represents with voltage.

Fig. 4 is ripple frequency and input, delivery pressure pulsation Spectrum Relationship contrast figure, and wherein abscissa is a frequency hertz number, and y coordinate is respectively input, the delivery pressure spectrum number of pulsing, and is that unit represents with voltage with decibel (dB).

Fig. 5, for by fluid pressure loss plotted curve behind the utility model device, wherein abscissa is that flow (rise/minute) y coordinate is pressure loss MPa (MPa)

Describe concrete structure of the present utility model and working condition thereof in detail below in conjunction with Fig. 1 Fig. 2.

Liquid input jet pipe (3), be installed in by housing (1), on the round case type container that end cap (2) is combined into, its position is tangent with the edge of circle case type container, and the inwall end face that makes input jet pipe outer wall end face and round case type container is on same horizontal plane.Liquid output jet pipe (4) is connected with this container at the circle centre position of circle case type container one side plane, and it is perpendicular with the plane of this container, so input jet pipe of the present utility model (3) and the axis of exporting jet pipe (4), not on same straight line, and spatially vertical mutually.When liquid after oil hydraulic pump output, spray in the container through input jet pipe (3), and in container along container rim inwall high speed rotating, the liquid that is pressed against the center at last just by with flowed to rectangular output jet pipe (4) ejection originally.

Fig. 3 Fig. 4 is and uses Japanese CF-910 Twin channel fast frequency spectrum ANALYZER to record test result, as seen from Figure 3 when ripple frequency f=5Hz, input, the maximum pulsation of delivery pressure amplitude reduce (0.9475-0.2002/0.9475) * 100%=79% approximately, work as ripple frequency as seen from Figure 4 between 50～500Hz, its output fluid pressure pulsating power spectrum obviously reduces, and illustrates and uses this canceller can obtain obvious effects.

As seen from Figure 5 as incoming pressure (P _S) when being 1.5MPa, flow (Q liter/minute) is even change, the pressure loss is changed little, and all lose very little, but about 0.1MPa.

Comprehensively the above can be found out, the utlity model has following advantages:

1, simple in structure, easy to manufacture, cost is low, and the life-span is long, applies easily.

2, the applicable liquid scope is wide, because liquid need not pass through fine eyelet, so no matter water, oil, mud all can use, does not have blocked danger.

3, elimination fluid pressure ripple frequency scope is wide, effective, and all frequencies all have positive effect the above person of 50Hz up to 500Hz.

4, fluid pressure loss is little, this be since liquid in cavity volume, fully by inertia own, high speed rotating, and must be by the effect of the machinery that adds, at last by with the center ejection of the perpendicular annular flow liquid of input jet pipe (3), thereby obtain optimum efficiency.

5, except that liquid, the utility model also is useful on the possibility of other fluids.

Claims

1, a kind of device that influences flow of fluid, particularly fluid pressure pulsation dampener, this canceller is connected in the liquid transmission pipeline, comprising: liquid input jet pipe [3], liquid reservoir, liquid output jet pipe [4] is characterized in that:

(1) described liquid reservoir, the round case type container that combines for disc type housing [1] and end cap [2];

(2) described liquid input jet pipe [3], connection is in the round case type container edge as liquid reservoir, liquid output jet pipe [4] is communicated with the circle centre position at this container one side plane, and the axis of input output jet pipe point-blank and does not spatially intersect at a certain angle.

2, device according to claim 1 is characterized in that liquid input jet pipe (3), be connected with container with tangent place, circle case type container edge, and within the outer wall end face that makes input jet pipe (3) and the round case type container wall end face on same horizontal plane.

3, device according to claim 1 and 2 is characterized in that liquid output jet pipe (4), is connected with this container at the circle centre position of justifying case type container one side plane, and perpendicular with the plane of this container.