DE7107550U - MULTICYLINDER PUMP WITH ADJUSTABLE PISTON LIFT - Google Patents

Description

MULTICYLINDER PUMP WITH ADJUSTABLE PISTON LIFT.

The present invention relates to multi-cylinder pumps with adjustable piston strokes.

In various fields of application there is a need to use a number of liquids in a specific constant relationship to pumping. In many other areas of application, these liquids must be used simultaneously but are delivered in separate rivers,

especially when it comes to liquids that react with one another, to prevent them from getting inside of the pump body or react with one another upstream of it.

The invention therefore provides a pump unit consisting of two pump units with an adjustable piston stroke, wherein each unit pumps a separate liquid and the pistons of both units are driven by a common shaft will. The funding ratio can be adjusted by means that make it possible on the common Shaft to adjust the travel of each piston independently. This becomes the demand ratio that has been set once not influenced by the speed of the pump shaft.

The means for adjusting the stroke consist, for each piston, of -2 in em non-rotatably connected to the shaft, which is rotatable within an opening provided eccentrically in a disk. Around this washer is the connecting rod

1.

head pivoted. The stroke of each piston becomes changed by turning the disc around the eccentric until the desired piston radius is reached, after which the eccentric is attached to the disc. Ee there are still resources available for the relative position to be able to easily regulate the eccentric opposite the disc from the outside. Because both pistons are driven by a common shaft are, as already said, the delivery ratios for each liquid remain constant, regardless of / the speed of rotation of the pump shaft.

Both pistons are advantageously designed as two-disc pistons, so that the cylinder in which they work in is divided into three chambers and a Zvischsr.kasissr is formed between the upper and lower chambers, which serves to improve the separation between the required liquid and the lubricating oil of the pump.

An embodiment of the pump according to the invention is now based on the. attached drawing will. Show it:

Figure 1 is a vertical section through the pump;

FIG. 2 shows a section along line 2-2 of FIG. 1; and

FIG. 3 shows a representation of part of FIG. 1 on an enlarged scale.

According to the figures, the pump housing contains Ip also the transmission gear e through which the movement

2.

• *

is transmitted to the pump shaft by a motor (not shown). The drive shaft 16 is rotatably arranged in the housing 10 in two bearings 12 and 14, and a belt pulley is attached to its end protruding from the housing by means of a bolt 20 and a spring washer 22. A ring gear 24 wedged on the shaft drives a ring gear 26 wedged on the pump shaft 28, and aait this forms the aforesaid step-up gear. Two circular eccentrics 34 and 36 sit on the pump shaft / 28 * Each eccentric is within an exactly matching

circular opening of a disc. 38, 40 rotatable. These Openings are also made in the panes. Each disc 38, 40 is within the annular head 55, 5? the connecting rods 54, 56 are rotatable.

The parts of the shaft, which each extend from an eccentric to your end, are mounted in sockets 46 and 48, which in turn are rotatable in bearings 30 and 32 in the housing 10. In the vicinity of the eccentrics each bush forms a circular flange 47 and 49. Each flange is ■ it einee radial slot 50 or 52 provided in which engage pins which fitted in the slots n d ^a facing side surface of the discs 38, 40 are. The elements 38, 40 and 55, 57 are held on the eccentrics 34, 36 by the said flanges 47 and 49 as well as by the flanges 35 and 37 provided on the. One knurled

3.

7107 510-8.11.73

;> Disc 51 or 53 sits on the protruding from the housing 10 End of each bay, while a dial 94 or 96 by wedges 89 on the ends of the pump shaft 28 is attached. If one of the dials 94 is rotated

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53, so the over -en pins 42 and 44 connected to the Fjchse disc 38 and 40 around its eccentric ' rotated, and thereby the crank radius and consequently

the stroke of the corresponding piston also changed continuously. the knurled disks 51 and 53 can also be provided with a range of references, while the scale of the Scale shard 94; 96 either directly to the stroke of the piston or can correspond to the displacement of the cylinder.

With the arrangement just described, the stroke of each piston can be adjusted independently of that of the other . and therefore the ratio between the amounts of liquid delivered by each pumping unit can be arbitrary are fixed, simply by rotating the knurled disks 51 or 53 with respect to the dials 94, and by subsequently tightening the bolts 90, 92.

The pistons 58 and 60 are designed as two-disc pistons. The upper disk 62 as well as the lower disk of the piston 58 form an intermediate chamber 76 in the cylinder 70. Similarly, the upper disk 64 and the lower disk 68 of the piston 60 in the cylinder 72 a

4th

Zvischenk & mmer 86. FIG. 2 shows the one with the suction side 78 and the pressure side 80 connected upper chamber 74 of the right cylinder 70. The upper chamber is similarly 84 of the left cylinder 72 with the other liquid in communication. Air tanks can be installed on the pressure side of both pumps 82 or 88 can be provided to achieve a more evenly wet river. The intermediate chamber 76 is standing via slots (not shown) in the cylinder wall in connection with the outside air. This intermediate chamber serves to prevent any direct contact between the fluids conveyed and the lubricating oil of the pumps, even in the event that the piston disks are no longer tight keep. This is because both a liquid seeping through the upper disk 62 and anything through the lower disk Leaking oil is expelled to the outside through the slots. The same applies to cylinder 72. Obviously, the diameters of the cylinder 70 and 72 can either be chosen equally different.

5.

Claims (1)

Sweeping cylinder pump with adjustable piston hoods, in W. of the two pump units in a "one" common housing housed and by a common pump shaft are driven * characterized in that the Pump shaft (28) provided with two eccentrics (34, 36) and between each eccentric and the head (55, 57) of the corresponding connecting rod (54, 56) each with a pair of scissors (38, 40) mounted in said connecting rod head one in the center of it, the eccentric receiving opening is interposed in such a way that by the rotation of the disc (38, 40) relative to the eccentric (34, 36) the crank circle and thus the Piston stroke is changed continuously. 2. Multi-cylinder pump according to claim 1, characterized in that that the pump shaft (28) is mounted on both sides of the eccentric (34, 36) in sockets (46, 48) which are connected to the Disks (38, 40) are non-rotatably connected and rotatable via bearings (30, 32) in the housing (10). 3. Multi-cylinder press according to claim 2, characterized in that each bushing (46, 48) on its eccentric (34, 36) The side facing it is provided with a flange (47, 49) resting against the eccentric, and the flange has a has a radial slot (50, 52) into which a pin (42, 44) fastened in the log (38, 40) engages. 6th 4. Multi-cylinder press according to claim 3, characterized marked J is characterized in that each eccentric (34, 36) at its from the sleeve flange (47, 49) facing away side with a flange (35, 37) is provided, sodaas each pair of flanges (35, 47 or 37, 49) forms a lateral guide for the disks (38, 40) and the connecting rod heads (55, 57). 5. Multi-cylinder press according to one of claims 2-4, characterized marked that the Pumpenwelic (28) and the bushings (46, 4S) on their outside of the housing (10) Parts with means (51, 53, 94, 96, 90, 91) are provided to oppose the bushings of the pump shaft to rotate to a desired position, which determines the piston stroke, and to secure it in this position. 6. Multi-cylinder pump according to one of the preceding claims, characterized in that each piston (58, 60) with two disks (62, 66 or 64, 68) are provided, which form an intermediate buyer (76, 86) in the cylinder (70, 72), which is connected to the outside air via slots made in the cylinder wall.