公开(公告)号：WO2019229566A1

公开(公告)日：2019-12-05

申请号：PCT/IB2019/053969

申请日：2019-05-14

Applicant: CASAPPA S.P.A.

Inventor： LETTINI, Antonio ,  GUIDETTI, Marco ,  RIGOSI, Manuel

IPC: F04C2/14

Abstract: A volumetric gear machine interacting with a working fluid comprising: - a first toothed wheel (3) with helical teeth comprising a first tooth (31) in turn comprising a first and a second flank (311, 312) opposite each other; - a second toothed wheel (4) with helical teeth having two opposite flanks, the first and the second wheel (3, 4) being operatively coupled in a meshing area (2). At a portion of the meshing area (2), the first and the second flank (311, 312) being in simultaneous contact with the second wheel (4).

公开(公告)号：WO2016207768A1

公开(公告)日：2016-12-29

申请号：PCT/IB2016/053606

申请日：2016-06-17

Applicant: CASAPPA S.P.A.

Inventor： LETTINI, Antonio

IPC: F04B1/20 ,  F04B1/32 ,  F04B49/00

CPC classification number: F04B49/002 ,  F04B1/2078 ,  F04B1/324 ,  F04B49/06 ,  F04B49/125

Abstract: A variable displacement pump comprising a pumping piston (10), cylinder head (2); a rotating shaft (3); regulating means (4) of the displacement of the pump, said means in turn comprising: a structure (41) having a variable inclination; a fluid-dynamic actuator (42) for regulating an inclination of said structure (41); command means (43) for the actuator (42), which assume a non-equilibrium and an equilibrium position, said command means (43) in turn comprising: a sliding body (431) being able to take at least a first position in which it places a chamber (420) acting on said actuator (42) in communication with a first zone (51) at least initially having a pressure that is different from a pressure present in said chamber (420); a sliding element (432) with respect to the sliding body (431) for resetting said equilibrium configuration, said sliding element (432) being distinct from said actuator (42) and being mechanically actuated in consequence of a variation of an inclination of said structure (41).

Abstract translation: 一种可变排量泵，包括泵送活塞（10），气缸盖（2）; 旋转轴（3）; 调节装置（4），所述装置依次包括：具有可变倾斜度的结构（41）; 流体动力致动器（42），用于调节所述结构（41）的倾斜度; 所述执行器（42）的指令装置（43）具有非平衡位置和平衡位置，所述指令装置（43）依次包括：滑动体（431），其能够至少具有第一位置，其中， 它将一个作用在所述致动器（42）上的腔室（420）与第一区域（51）连通，至少最初具有与所述腔室（420）中存在的压力不同的压力; 相对于滑动体（431）的滑动元件（432），用于复位所述平衡构型，所述滑动元件（432）与所述致动器（42）不同，并且由于所述结构的倾斜度的变化而机械地致动 （41）。