公开(公告)号：WO2017089852A1

公开(公告)日：2017-06-01

申请号：PCT/IB2015/002212

申请日：2015-11-24

Applicant: NVB PROPULSION INTERNATIONAL LTD ,  VAN DER BLOM, Nicolaas

Inventor： VAN DER BLOM, Nicolaas

IPC: F16J3/06 ,  F04B53/14 ,  F16F9/48 ,  F16J10/00 ,  F15B15/14

CPC classification number: F16J10/00 ,  F04B53/143 ,  F15B15/1452 ,  F16F9/483 ,  F16J3/06

Abstract: A piston-chamber combination comprising a chamber (1) which is bounded by an inner chamber wall (4), and comprising a piston (1) in said chamber (2) to be engagingly movable relative to said chamber wall (4) at least between a first position and a second position of the chamber (2), said chamber (2) having cross-sections of different cross-sectional areas and differing circumferential lengths at the first and second longitudinal positions, and at least substantially continuously different cross-sectional areas and circumferential lengths at intermediate longitudinal positions between the first and second longitudinal positions, the cross-sectional area and circumferential length at said second longitudinal position being smaller than the cross-sectional area and circumferential length at said first longitudinal position, said piston (1) is comprising an member (12) for suspension of the sealing (8, 9), said member (12) is rotatable, and said sealing (8, 9) is comprising a separate part (6, 6') engaging the wall (4) of said chamber (2) and a sealing (8, 9) made of elastically deformable impervious material, and mounted on the piston rod (5). This is achieved by the piston (1) is produced to have a production-size of said separate part (6') and said sealing (8, 9) in the stress-free and undeformed state thereof in which the circumferential length of the piston (1) is approximately equivalent to the circumferential length of said chamber wall (4) at said second longitudinal position, the piston (1) being expandable from its production size in a direction transversally with respect to the longitudinal / circular direction of the chamber (2) thereby providing for an expansion of sealing (7) of the piston (1) from the production size thereof during the relative movements of the piston from said second longitudinal position to said first longitudinal / circular position, one end, closest to a second longitudinal / circular position of the chamber, the sealing (7, 7') is embedded in a separate part (6, 6'), said sealing (8,9) of the piston (1) is comprising sealing sections (19, 20; 51, 51') in a direction along the piston rod (5), said sealing (7) is updivided in said sections over the circumference of said sealing (7), and, the angle (δ;ξ) in-between two adjacent sealing sections is much less than 180°, one other end, closest to a first longitudinal / circular position of the chamber, said sealing (7) is updivided updivided in said sections over the circumference of said sealing (7), and, the angle (ε;ψ) in- between two adjacent sealing sections is bigger than said angle (δ;ξ).

Abstract translation: 一种活塞室组合，包括由内室壁（4）界定的室（1），并且包括在所述室（2）中的活塞（1），所述活塞相对于 所述室壁（4）至少在所述室（2）的第一位置和第二位置之间，所述室（2）在第一和第二纵向位置处具有不同横截面面积和不同周向长度的横截面， 并且在第一和第二纵向位置之间的中间纵向位置处至少基本上连续不同的横截面面积和周向长度，所述第二纵向位置处的横截面面积和周向长度小于第一和第二纵向位置处的横截面面积和周向长度 所述第一纵向位置，所述活塞（1）包括用于悬挂所述密封件（8,9）的构件（12），所述构件（12）是可旋转的，并且所述密封件（8,9）包括 与所述腔室（2）的壁（4）接合的分离部分（6,6'）和由可弹性变形的不可渗透材料制成并且安装在活塞杆（5）上的密封件（8,9）。 这是通过将活塞（1）制造成具有所述分离部分（6'）和所述密封件（8,9）的产品尺寸的无应力和未变形状态来实现的，其中活塞 （1）大致等于所述室壁（4）在所述第二纵向位置处的圆周长度，所述活塞（1）可从其生产尺寸在相对于所述室的纵向/圆周方向横向的方向上 由此在活塞从所述第二纵向位置到所述第一纵向/圆形位置的相对运动期间提供活塞（1）的密封件（7）从其生产尺寸的扩张，一端最接近第二纵向位置 （7,7'）嵌入单独的部件（6,6'）中，所述活塞（1）的密封件（8,9）包括密封部分（19,20） ; 51,51'）沿着所述活塞杆（5.1）的方向移动 ），所述密封件（7）在所述密封件（7）的圆周上的所述区段中被分段，并且两个相邻密封区段之间的角度（δ;ξ）远小于180°，另一个最接近 到所述腔室的第一纵向/圆形位置，所述密封件（7）在所述区段中在所述密封件（7）的圆周上向上分成两部分，并且两个相邻密封部分之间的角度（ε;ψ）较大 比所述角度（δ;ξ）。