Valved piston pump with cylinder biasing means
AssigneeLinde Aktiengesellschaft
InventorsHelmut Dresler, Ernst Turnwald
Life of this patent
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Abstract
A piston pump for conveying a fluid includes a cylinder which is not flanged to the pump casing, but rather is inserted in the pump casing and is retained in the longitudinal direction by a pretensioned spring. A seal is arranged between the cylinder jacket and the pump casing in order to seal the pressure side with respect to the suction side of the piston pump. An extremely compact piston pump results therefrom, suitable, in particular, for use in the low-temperature range due to very low cold losses.
Claims15
A piston pump for conveying a fluid includes a cylinder arranged in a pump casing and a piston displaceable within the cyclinder in the longitudinal direction, one end of the cylinder being associated with a pressure side and the other end of the cylinder being associated with a suction side of the piston pump, wherein the cylinder (2) is supported by a support (3) in the longitudinal direction with respect to the pump casing (1) and is urged with a pretensioned spring (4) in the direction of the support (3), wherein the pressure side (II) is sealed with respect to the suction side (I), and wherein at least one spacer element (7) for centering the cylinder (1) is disposed between the cylinder (2) and the pump casing (1).
A piston pump arrangement configured to minimize mass while maintaining both cooling capacity as it conveys a fluid and structural integrity with a pump casing, the piston pump arrangement, comprising:
- a cylinder having a first end and a first chamber from which fluid to be pressurized is sucked, the cylinder having a second end and a second chamber in which the fluid is pressurized;
- a piston disposed within the cylinder, the piston having a pressure face;
- a suction face and a one-way valve communication one face with another, the piston moving in a first direction for pressurization and a second direction for suction and generating reaction forces on the cylinder as it reciprocates;
- means for reciprocating the piston in a longitudinal direction;
- an outlet valve disposed proximate the second end of the cylinder, the outlet valve being biased toward the pressure face of the piston and opening upon the pressure of the fluid reaching a preselected level;
- an outlet connected to the cylinder upstream of the outlet valve for receiving the pressurized fluid;
- an inlet in communication with the suction face of the piston for supplying the fluid to be pressurized;
- means proximate the first end of the cylinder for supporting the first end of the cylinder on the pump casing;
- means proximate the second end of the cylinder for supporting the second end of the cylinder on the pump casing;
- and
- means fixed to the pump casing and engaging the cylinder for biasing the second end of the cylinder against the pump casing, said biasing means applying a resilient force in opposition to the first direction in which the piston moves so as to absorb reaction forces acting on the cylinder.
Dependencies are inferred from the claim text.