Abstract: A jointless braided sealing ring and a method and a special machine for producing it are disclosed. The braided sealing ring adopts a multi-layers braided structure comprising a number of continuously sleeved ring layers arranged from inside to outside. The innermost braided ring layer is the core. The tail end of the first braided ring layer is sleeved on the starting end of the first braided ring layer and serves as the starting end of the second braided ring layer to implement continuous braiding without interruption. N braided ring layers have (N?1) continuous intact braided ring layers. The tail end of the outermost braided ring layer is superposed with the starting end of the innermost braided ring layer. Service life and sealing effect are increased. A perimeter-defining ring in the sealing ring improves dimensions precision of sealing ring, and avoids deforming the sealing ring during braiding and trimming.

Abstract: A jointless braided sealing ring as well as a method and a special machine for producing such a sealing ring are disclosed. The braided sealing ring adopts a multi-layers braided structure comprising a number of continuously sleeved ring layers arranged from inside to outside. The innermost braided ring layer is used as a core. The tail end of the first braided ring layer (1) is sleeved on the starting end of the first braided ring layer (1) and serves as the starting end of the second braided ring layer (2) to implement continuously braiding without any interruption. The second braided ring layer (2) is sleeved on the first braided ring layer (1) and the third braided ring layer (3) is sleeved on the second braided ring layer (2). The Nth braided ring layer (4) is sleeved on the (N?1)th braided ring layer (5). N braided ring layers have (N?1) continuous intact braided ring layers. The tail end (8) of the outermost braided ring layer is superposed with the starting end (7) of the innermost braided ring layer.