FIELD: engines and pumps.
SUBSTANCE: pump has an operating diaphragm (14) fixed in the assembled state (28) between the parts (30, 38). It contains the drive (10, 12) for performing injection strokes. The operating diaphragm (14) in its elastic portion (26) is stabilized by the support element (18, 54) and has a sealing bead (44). Between the operating diaphragm (14) and the part made in the form of an intermediate plate (30), the swelling-compensating space (40) is formed, provided between the sealing bead (44) and the separating rib (46).
EFFECT: increased service life of the diaphragm; can be used in creating devices with high operating pressure.
10 cl, 6 dwg
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