DE7136453U - ELECTROMAGNETIC DIAPHRAGM PUMP - Google Patents

Description

TELDIX GmbH

6900 Heidelberg
Grenzhofer Weg 36

Heidelberg, September 22, 1971 E / Ft-Seh / Bä E-235

Electromagnetically operated diaphragm pump

The innovation relates to an electromagnetically actuated diaphragm pump containing one against the force of a spring system movable anchor. Such diaphragm pumps have a diaphragm connected to the armature and furthermore inlet and outlet valves which are controlled according to the movement of the armature.

A known diaphragm pump of this type is controlled by a pulse train which alternates the electromagnet turns on and off. For optimal operation of the pump it is necessary to adjust the resonance frequency of the oscillatable System containing the spring system and the armature to match the frequency of the pulse train. Furthermore, sum must adjust the optimal working point of the armature stroke can be changed. In the known diaphragm pump is by shaping and material strived to optimally design the diaphragm pump. However, due to manufacturing tolerances Adversely affected result.

ζ * / 2 °

It is therefore the task of the innovation to create a simple pump whose optimal working point can be easily adjusted is, whereby the construction volume should be as small as possible.

This object is achieved according to the present innovation in that the spring system is at least two non-positive Has overlying leaf springs, which are preferably disc-shaped and arcuate Have slots, and that said leaf springs can be rotated relative to one another. Thus, by simply twisting it of the leaf springs, the respective effective spring length of the spring system and thereby the spring constant can be changed. Furthermore, the setting of the spring constant "can be made when the pump is fully assembled, without any components being removed or exchanged Need to become.

An advantageous design of the diaphragm pump is characterized in that the leaf springs are designed to be identical to one another and each have two slots on two concentric circles, which extend over approximately 180 ° extend so that diametrical webs are present on the inner and outer circle, which are preferably at 90 ° to each other are offset. There are manufacturing advantages, since only one type of spring is required, which is very easy to manufacture.

A diaphragm pump according to the innovation is excellently suited " for installation in hydrostatic fluid-mounted centrifugal devices to generate the pressure of the storage fluid, because due to the simple optimizability of the 4-part pump, a large pressure can be generated with an extremely small size. The pump is arranged in a closed circuit of the storage liquid. To compensate for tolumenan soot, for example as a result of the influence of temperature and ZHB pressure compensation, it is proposed to be concentric to the

7 136450 30 IZ ⁷ '/

E-235 IO / 3

Membrane pump in a housing a compensation chamber with eilicfil üeixg VOPÄUSOiieli, Υίϋΰΐχΐ'ΰίΐ in VöJL'oeiiiiäftiJX 'way the membrane pump is integrated into the gyroscope.

An embodiment of the innovation will be explained with reference to the drawing. Show it

Fig. 1 is an axial section through the pump arranged in a housing

2 shows a plan view of the spring system in the direction of arrow A. FIG according to FIG. 1, but on a smaller scale, the springs not being twisted against one another

FIG. 5 is a plan view corresponding to FIG. 2, with the springs are rotated against each other by 90 °.

According to Fig. 1, the diaphragm pump has an electromagnet containing an annular iron core ^ in which a winding 2 of a bing coil is arranged. A return ring 3 is placed on the winding 2 from above and connected to the iron core 1. A conical anchor 4 is arranged in the middle of the winding 2 and connected to a membrane 5 designed as a spring, which in turn is clamped on the circumference of the iron core 1 by means of a plate 6. There are two on the lower face of the anchor Disc-shaped leaf springs 7, 8 arranged one above the other, the distance to the armature 4 by means of an adjusting screw 9 »which rests against said leaf springs 7» 8 with a shoulder 10, is adjustable. By twisting the adjusting screw 9 can contain the spring system Leaf springs 7 »-8 and the membrane 5 preloaded and the armature stroke can be set. The leaf spring 8 is attached to its outer periphery with the iron core 1, while the lower leaf spring 7 between the housing base 11 and the spring 8 is rotatable. The anchor 4 has a central and on lower end conical longitudinal bore 12 which

713645530.il "' _{/ 4}

• ■ II ··

together with a ball 13 and a spring 14 the inlet

VSHOJ-JL üliücu · JlII OcX * i'iJLwwc GSjl "« 'JlSwwc O 13u cjlIi äü5jl3u—

valve provided, with a ball 15 by means of a spring 15a is fixed in a conical bore 16. The volumer, the pump chamber 17 between the diaphragm 5 and the plate is changed by switching the electromagnet on and off. A housing cover 18 is connected to the housing base 11 by screws 19, with an O-ring 20 on the outer Scope is provided for sealing. Inside the lid a bellows 21 is arranged concentrically with the electromagnet, so that between the diaphragm pump described and one connected to the bore 23 of the housing bottom 5 Consumers a variable volume compensation chamber 22 is available.

In Fig. 2 a part of the diaphragm pump is in the direction of the arrow A shown in FIG. Here is the leaf spring 7 rotated with respect to the leaf spring 8 in such a way that the circular arc-shaped slots of the said springs are exactly lie on top of each other. The leaf spring 7 (the same applies to leaf spring 8) has two inner circular arcs Slots 7a, 7b and two on an outer circular arc Slots 7c, 7d, each slot extending approximately 180 °. The bridges 7e (8e) in between on the outer and inner arcs are offset from one another by 90 °. It is well known that a unilaterally clamped Leaf spring the spring constant depends, among other things, on the effective spring length. In the case of those shown in FIG In leaf springs the effective spring length is denoted by I ^, whereby it should be noted that there are four such springs per spring Spring lengths are available.

In Fig. 3, the spring 7 is shown rotated by 90 ° with respect to the spring 8, so that the webs 8e in the slots £ a-d are visible. The now essentially effective spring

713645330.1Z ⁷ « _{/ 5}

E-235 S / 5

longer, are _{denoted by l o} - Since the two leaf springs 7, 8 are arranged in an axial direction frictionally one above the other, it should be noted that a total of only four spring lengths 1 ~ are effective when the armature 4 is deflected. Since the spring lengths Ip are now much shorter ice I ^ (about only half the size) and only need to be taken into account four times in total, the spring constant of the two springs 8, 9 together will also be greater in this case. Measurements showed that the spring constant in an arrangement according to FIG. 3 was about a factor of four greater than the spring constant in an arrangement according to FIG. Furthermore, there was a practically linear dependence of the spring constant on the angle of rotation of the springs. This result can easily be confirmed by a simple calculation using the known equations for leaf springs clamped on one side.

The function of the diaphragm pump is explained below. The winding 2 is by means of a voltage pulse train a Hechteckgenerator (not shown) controlled. When the electromagnet is attracted, it moves Armature 4 downwards and tensions the springs?, 8 and the diaphragm 5 »designed as a spring, the most precise of which springs at the same time serve as a parallel guide. The ball 13 opens the lower inlet valve and the liquid flows into the pump chamber 17 »There is no voltage on the winding 2 on, the armature 4 is moved upwards by the force of the tensioned springs. The ball 13 closes the inlet valve, while the ball 15 of the exhaust valve upwards is printed and the liquid in the direction of the arrow outwards into the equalizing chamber 22 and through the bore 23 reaches the consumer.

- Protection claims -

ϊ

Claims (5)

Protection claims 1. Electromagnetically operated diaphragm pump, containing an armature movable against the force of a spring system, characterized in that the spring system has at least two leaf springs (7, 8) lying one above the other, which are preferably disc-shaped and have arcuate slots, and that said leaf springs (7. 8) are rotatable against each other. 2. Electromagnetically operated diaphragm pump according to claim 1, characterized in that the leaf springs (7, 8) are identical to one another and have two slots (7a, 7b, 8a, 8b) and (7c, 7d, 8c, 8d) aufweissn, which extend over t- ^ approximately 180 °, so that on the inner and outer circle diametrical webs (7e, 8e) are present, which are preferably offset from one another by 90 °. 3. Electromagnetically operated diaphragm pump according to claim 1, characterized in that the leaf springs (7, 8) are arranged concentrically to the armature and that the distance between the leaf springs (7, 8) and the armature (4) means a centrally arranged adjusting screw 9 is adjustable. 4, electromagnetically operated diaphragm pump according to claim 3, characterized in that the spring system contains the membrane (5) designed as a leaf spring and that by means of the adjusting screw 9 a bias of the Spring system is adjustable 5. Electromagnetically operated diaphragm pump according to claim 1, characterized in that the diaphragm pump is arranged in a housing (11, 18) which has a concentric to the diaphragm pump arranged compensation chamber 22 with a bellows 21. Heidelberg, % 2 && bfl ·. 3 0 1?
E / Pt-Sch / Ba E-235 '""