DE1814118C3 - Adjustable throttle valve - Google Patents

Description

The speed or power range of the variable speed clutch used is the fluid leakage as well as the type of oil used, the age of the

convex triangle side (s) runs in such a way that the light widths (y) lying parallel to the base side (11) with increasing distance (x) from the base line (11) so

decrease that the oil from the throttle cross-section as * and the performance, ie the maintenance (F) at the beginning of the control stroke range (A) and condition of the cooling system. It is known that the area ratio formed from the throttle cross-section (/) at the end of the required liquid throughput always between the control stroke range (A) fluctuates between the two in a fixed ratio nis V = FIf for all axial positions of the control stroke limits, e.g. B. in a ratio of 1: 5, if area (A) is constant, and also that the position 30 drives the fluid coupling of a centrifugal machine, both control stroke area (A) of the throttle body (6), for example, a boiler feed pump. The erin displacement direction can be adjusted by adjusting means (15 required liquid throughput is with one to 18). adjustable throttle valve of the type mentioned above

2. Adjustable throttle valve set according to claim 1 (see. Eg DT-PS 12 37 388). Up to now, with a cylindrically arranged opening of the throttle valve 35, it was necessary, for each of the many applications, the down valve and with a piston as the throttle body, obviously of many sizes, e.g. B. Coupling size, rotation, characterized in that the opening (F ₀ ) number level, permissible temperature level, quite a lot on the scope of a corresponding housing-like, a closely graduated group of sleeve (S) fitted in the bore is attached. Ratio of fixed numbers of adjustable throttle valves

3. Adjustable throttle valve according to claim 1 * o to be kept ready. It is true that you have many parts of this or 2, characterized in that two of the family of throttle valves form the same and each other Triangle sides (11, 14) are straight and at right angles to keep a few different are arranged to each other. can restrict formed parts. But also

4. Adjustable throttle valve according to claim 1, this is with costs, inquiries with the customer, time-2 or 3, characterized in that the 45 is associated with loss and trouble.

Throttle opening through a variety of small- The object of the invention is to provide a throttle valve of the

Ren, preferably circular openings of the type mentioned at the beginning with the simplest possible construction is designed and arranged in such a way that by simple, at Monsind, that all of them are to edge parallel to the throttle position of the clutch and the cooling circuit measured light width, with increasing adjustment increasing the range of the required Distance from the base side at least an amount of throughput in terms of its location in wide

Limits can be set. This makes it possible, with just a few, different in size trained throttle valves meet all requirements, ranging from very small throughput quantities up to to cover large currents.

This object is achieved in that the in

The invention relates to a controllable throttle valve, the displacement direction of the throttle body, measured in particular for oil throughput control at the maximum filling height of the opening, is greater than the width of the controllable hydrodynamic flow couplings, 60 of the control stroke range and that the convex shape with a throttle side (s) of the triangle controlling the throttle cross-section ( n) runs in such a way, body (slide, piston or the like), which executes a control that the light widths lying parallel to the base side stroke range, whereby the opening that can be covered by the throttle body with increasing distance from the base line is roughly approximated take off that that has the shape of a triangle from the throttle cross-section, with parallel to the throttle start of the control stroke area and measured from the throttle edge with an increasing cross-section at the end of the control stroke area, the area ratio V = F // initially crossed during the closing movement for all axial Locations of the base and at least one is constant in a curve to the control stroke range and further that the

approaches steadily and degressively decreasing changes.

The position of the regulating stroke area of the throttle body is formed in, preferably circular, openings

Shifting direction is adjustable by adjusting means which are designed and arranged such that

is. their entire, parallel to the throttle edge

This creates a throttle valve with the same measured clearance with increasing distance from

constant wide control stroke range of the throttle body 5 of the base side at least approximately steadily and

created, which changes degressively decreasing after a change in the position of the.

Control stroke range the remaining cross-flow The invention is in the following on the basis of several

sections with regard to their absolute size on the execution examples shown in the drawings

A different level moves, depending on the game explained in more detail. It shows

which height of the triangle the control stroke range by 10 F i g. 1 an adjustable throttle valve in a cylindrical

Adjustment is relocated, but the ratio of the design with cam-moved throttle piston,

two remaining flow cross-sections in FIG. 2, the development of the throttle opening

Maintains constant end positions of the control stroke range. containing sleeve and

The two F i g, 3 adjoining the base side show the development of another sleeve.

Triangular sides are designed so that the 15 The throttle valve according to FIG

would take the inlet and outlet connections 1 and 2 parallel to the base side of the opening.

measured light width with the distance from the, by the cover 3 closed at the front,

Base side is based on an exponential law; substantially cylindrical housing 4, which is on

in particular in such a way that the circumference receiving the throttle opening parallel to the base side, in the

Measured clearance Y of the opening in the sleeve 5 fitted in the housing and that in the sleeve

Speed of the associated distance X of the equation with little play sliding throttle piston 6 is formed. The sleeve has one in the development

Y = Ic ₁ - k ₂ ^k * ^x Fig.2 and in another embodiment in

F i g. 3 shown in a first approximation triangular dross

is sufficient, in which 25 sel opening with the greatest extension // in

F ₀ In V _ actuating direction of the piston 6 and with the surface

^ i - "7 y {HihT ' ^{2 =} content F ₀ , measured on the inside diameter of the

Sleeve 5 on. A triangle side 11 is parallel to

and throttle edge 12 of piston 6, d. H. in the present

I 30 case perpendicular to the direction of adjustment of the piston, and

^ 3 ⁼ —- another side of the triangle 13 is to the inside of the triangle

" curved convexly so that the

means. Clearance widths Y measured parallel to page 11

With throttle opening with increasing distance X from

F = area of the opening ^{35 of the s} . ^decrease degressively. The third three-

"- _E , öß, e dimension d", ö "nu" _g in Ve, - ^ SS £ ^ S & t ΪΙΪϊΚΪ;

_st el, right _tm g of the rotating body, a ^ SugTb ^, N ^ ens SdUrST * in to

h = control stroke range of the throttle body, _{length of} adjustable piston rod 10 moved axially.

F = F // = ratio of the throttle cross 40 Due to the pressure of the inflowing liquid cut the role of the piston rod 10 over the piston 6 at the ends of the control stroke area. the flank of the cam 9 is pressed and the rope

train 8 streamlined. According to the largest cam lift Λ

In FR-PS 10 74 195, although a shut-off device is also able to move the piston 6 at most by that which is a similar cross-sectional shape of the 45 stroke h, the control stroke range. The For throttle body has, but this Absperrorgan change, which is placed on the throttle valve, that belongs to a different technical area, and regardless of the axial position of the Regelhubbereider provided cross-sectional shape is another ches h the ratio V at the beginning of the Underlying rule problem. It represents a simple opening / closing area between the throttle edge 12 and the valve and serves to shut off a water line enclosed by triangle sides 13 and 14, with F line, to prevent pressure surges (water hammer) during the designated area and the corresponding with / shut-off process to avoid and to achieve a light and designated area of the control stroke range constantly efficient actuation. For this purpose, the is, ie V = FIf = constant for all axial positions, the fluid flow is faster at the beginning than at the end of the control stroke range / :. This requirement will be narrowed by. For the present problem 55, the design of the throttle opening according to the invention, FR-PS 10 74 195 could thus satisfy the person skilled in the art. This result will not thereby give any suggestions. bothers that, for example, the throttle opening, as in

In a further embodiment of the invention, FIG. 3, consists of several partial openings, an adjustable throttle valve with cylindrical as long as the regulation of one of the first three arranged opening of the throttle valve and with a 60 sprüchc is complied with. Also a crooked one Piston provided as a throttle body that the opening triangular shape or a shape with two convex openings on the circumference of a triangle shaped into a correspondingly formed triangle is possible, Housing bore fitted sleeve is attached. Thanks to the length adjustability of the piston rod

Expediently, two of the triangular 10 can be axially displaced from the control stroke range / 1 Pages are straight and at right angles to each other. The piston rod 10 is for this purpose who arranged. formed in several parts. It consists of that

Another embodiment is that attached to the piston 6, at the outer end with Gedie Throttle opening by means of a large number of stud bolts 16 and one provided with small winches 15

This thread is screwed, provided with an application running on the cam 9 roller 19 nut 17 is of great length and a the location of nut 17 fixes the pins 16 lock nut 18. Although when adjusting the position of the Regelhubbereiches maintaining the ratio V = F / f, However, the cross-sections throttled within the control stroke range are changed and the corresponding flow rates are increased or decreased accordingly. The throttle valve is structurally very simple.

1 sheet of drawings

Claims (1)

Patent claims: 1. Controllable throttle valve, in particular for oil flow control on fluid-controlled hydrodynamic Fluid couplings, with a throttle body controlling the throttle cross-section (Slide, piston or the like), which executes a control stroke range, with that of the throttle body Inside the triangle convex triangle side. In the case of fill-regulated fluid couplings, this must take effect immediately as a loss-5 the slip and because of the correspondingly high loss amounts occurring in the clutch, a high one Working fluid throughput must be guaranteed through the coupling so that the working medium does not excessively heated. Depending on the height of the Coverable opening in a rough approximation the xo regulated slip must more or less quickly have the shape of a triangle, with the cooled oil lying parallel to the back throttle edge of the throttle body and exchanged for the oil affected by the power transmission. The size of this liquid throughput initially during the closing movement depends, among other things, on the base side driven over and at least one on the coupling size, i.e. on the size of the working space that is curved to the inside of the triangle and on the particular application of the triangular side formed, thereby coupling , ie whether the clutch indicates that the maximum drive torque measured in the displacement working machine is driven with the throttle body (6) constant over the speed or whether, as is usually the case, the height (H) of the opening (F ₀ ) is greater is the width of the control stroke range (Λ) and that the ao driving torque with decreasing drive speed ■ if it drops. Further influencing factors for the required