DE1528548C - Piston pump - Google Patents

Description

3 4

Paths up to the entry into the cylinder space, with that of a shoulder 15 on the piston and a stop 16

by the stepped section of the protruding on one of the end face of the piston

Piston and the cylinder formed annular space on pin 17 is freely movable on this.

while remaining connected to the suction chamber It can be seen that the shoulder 15 is the seat here

can, which forms the filling level of the pump even at high 5 of the suction valve 12 and that in the drawing

Pump speeds increased. Furthermore, the axial play 14 shown by the valve

represented by the suction-controlled suction opening formed as an elastic housing. On one side

Space pressure fluctuations limited by the oscillating belt of the seat formed by the shoulder 15

Movement of the piston and the filling medium balanced piston5 in the cylinder! an annulus 18, the

chen, which further improves the filling level of the pump. io constantly with radial bores 19 in the cylinder

Overall, a piston pump is connected to a suction chamber 20 by the invention,

with high efficiency even at high work rates. On the other side of the shoulder 15, it is through

speeds of the piston created, the valve 12 and the pin 17 delimiting the annular space

Piston pump can be made small and ". 18" via openings 22 in the stop 16 with the

thereby and because of the high efficiency z. B. 15 working space 21 connected to the pump. This one as

also suitable as an injection pump. Disc trained stop 16 is with a one

It is known per se, pressure fluctuations in the further passage for the liquid-forming radial

Suction line of a piston pump by training len slot 23 attached in a groove of the pin 17,

of an elastic pipe section in the suction pipe, this fastening being sufficient for the stop

compensation of the pump. 20 to be held in the groove as soon as the

Further features of the invention are the subject of the disc together with the piston in the drilling

of the subclaims. tion 13 of the cylinder is introduced.

An embodiment of an invention- In addition, this stop, as in the drawing Piston pump is shown below on the basis of the voltage, secured by means of a spring 24 who-drawing described. In the drawing, 25 shows the.

Fig. 1 is an axial section through a pump with It is easy to understand that in the illustrated

a single piston and pump the friction of the valve 12 in the bore .13

F i g. 2 shows a plan view of the piston head of the cylinder 1 and its inertia, even its

speaking the arrow II in F i g. 1. · Inertia alone, sufficient caused by the axial play

The pump shown has a cylinder !, the suction opening formed 30 14 under the action of the oscil-

in the present case is attached to a housing 2, sliding piston movements reliably and easily

in which a connecting rod 3 moves, which can be opened and closed by a respective one at the required time

Bolt 4 is connected to the piston 5 of the pump. close regardless of the working conditions

The cylinder head 6 forms a seat 7 for an outlet from the pump (frequency of the piston movements and

release valve 8 of the conventional type, which is pressurized by a spring 9 35),

against the seat 7 is held .. In order to otherwise pressure fluctuations in the.

The spring 9 is supported on a stop 10, the suction line is excluded in a known manner

which, like the cylinder head, is provided by an elastic container on the

Cylinder 1 screwed union nut 11 on this pump according to the invention thereby obtained.wird that the

is attached. 40 suction chamber 20 made of an elastically stretchable

The piston 5 is formed with a suction valve 12 which fits tightly at its ends onto the hen, which is ring-shaped and on the one hand cylinder 1 is clamped and on which a sliding in the bore 13 of the cylinder 1 mounted connection piece 25 for the suction line 26 is formed is, on the other hand with an axial play 14 between is.

1 sheet of drawings

Claims (6)

1 2 of a circumferential groove of the piston is axially displaceable. Claims: Due to the friction on the cylinder and the inertia of the ring-shaped suction valve, it shifts 1. Piston pump with one attached to the piston counteracting the reciprocating motion of the piston and axially adjoining the piston, 5 above the piston and opens or closes a ring-shaped suction valve, the piston sliding in the cylinder in the axial direction through the antend stored and with axial play free against the suction opening or a gap between the circumference of the piston Piston is movable and due to its axial and cylinder and controls the entry of the allusion a suction opening opens and closes, sucking medium into the cylinder. In the open a d u r c h characterized that the KoI- io th position is the ring-shaped intake valve at the ben (5) is a full piston which, in the area of its front, delimits the annular groove in the piston on the cylinder space side The front end is stepped off, the shoulder of the piston, which is for the passage and that the stepped section of the axially extending through-piston of the filling medium (5) is provided with the cylinder (1) an annular space openings, which the circumferential groove of the (18) forms which connect the piston to the cylinder chamber via radial bores (19) in the cylinder. linder (1) with a suction space (20) in connec- The same training principle of the suction valve tion stands, and that the annular suction valve is also known in multiple pistons, where the (12) in front of the free front face of the piston, an annular suction valve in the space between two (5) is arranged and a piston seated on the end face of a common piston rod Piston protruding pin (17) through which anao is axially displaceable and thereby axial passage opening suction valve (12) reaches through and the pin opens or openings through the piston depending on the position (17) closes with a near its free end. The known piston pumps of this type have a stop (16) for the suction valve (12) is and that the suction chamber (20) by a predominantly a large size and are due Cylinder (1) surrounding, known per se ela- 25 their special training mostly not for the single table Housing is formed. build in small machines such as inMotore 2. Piston pump according to claim 1, characterized in that; suitable as injection pumps with a rapid pumping sequence, indicates that the suction valve (ί2) has the shape because of the passage openings in the known a sliding bushing, the inner diameter of which piston is also a major manufacturing issue to the working space (21) of the pump, a conical 3 ° wall is required for the piston. As the filler expands. medium on the suction stroke of the piston in its 3. Piston pump according to claim 1 and 2, there pass channels through its entire axial length characterized in that the stop (16) must the fen is because of the effective friction in the Form of passages provided with openings (22) and because of the inertia of the filling disc whose outside diameter is greater than 35 mediums affects the filling level of the pump, insals which lead into the working space (21) of the pump, especially if it is a high-speed one rende passage opening of the suction valve (12). Pump acts. It also comes with the back and forth 4. Piston pump according to claim 3, characterized in that the piston moves back to pressure fluctuations in the indicates that the disc-shaped stop is filling medium, which with the increase in the working (16) a radially extending slot (23) to increase the speed of the piston, which indicates the filling, which for resilient attachment to a 'degree deteriorated further. Circumferential groove near the free end of the object of the invention is a piston pump Pin (17) is used. to create that is easy and cheap to manufacture and 5. Piston pump according to claim 1 to 4, there- fore a possi- ble even at high piston speeds characterized in that the stop (16) 45 reaches a good degree of filling. by a spring (24) against a side wall of the This task is performed in a piston pump of the Circumferential groove in the pin (17) is biased. initially mentioned type according to the invention thereby 6. Piston pump according to claim 5, characterized in that the piston is a Yoll piston, which in the denotes that the spring (24) is stepped off around the region of a front end face Pin (17) arranged coil spring and 50, and that the stepped portion of the between the end face of the piston (5) and the piston with the cylinder forms an annular space which Stop (16) is inserted. via radial bores in the cylinder with an _r suction chamber is connected, and that the ringför mige suction valve in front of the free front face ■ 55 of the piston is arranged and one from the end face of the piston protruding pin engages through the suction valve and the pin in the vicinity of his free end with a stop for the suction The invention relates to a piston pump which is provided with a valve, and that the suction chamber through a cylinder which is known per se and is attached to the piston and axially attached to the cylinder subsequent, annular suction valve, the stical housing is formed. Slidably mounted in the cylinder and free with axial play. is movable against the piston and is due to its piston and the annular space formed thereby over Axial play a suction opening opens and closes. Radial bores in the cylinder with the suction chamber There are numerous known piston pumps in which the simple HerMtihing is connected <each new suction valve is arranged in the piston. In the piston, because the axially essentials are axially essential in it, the suction valve as a ring of openings is omitted. In addition, cigcberi up for formed, which is slidably mounted in the cylinder and in the Füllmedjum heim suction stroke de? Kpjijens short