Pump assembly and a propulsion system

A pump assembly and a propulsion system that utilize the pump assembly include a casing defining an opening. The pump assembly also includes a first member at least partially disposed in the opening.The first member is movable linearly relative to the opening. The pump assembly further includes a biasing member disposed in the opening. The biasing member is movable independently of the first member. The first member is movable in a first direction that applies a load to the biasing member which creates a torque on the biasing member. The pump assembly also includes a second member that separates the first member and the biasing member such that the torque on the biasing member is transferred to the second member without transferring the torque to the first member when the first member applies the load to the biasing member. 泵组件和利用泵组件的推进系统包括限定开口的壳体。泵组件还包括至少部分地设置在开口中的第构件。第构件可相对于开口线性地移动。泵组件进步包括设置在开口中的偏置构件。偏置构件可独立于第构件而移动。第构件可在第方向上线性地移动，从而将负载施加至偏置构件，从而在偏置构件上产生转矩。泵组件还包括第二构件，其将第构件与偏置构件分离，使得当第构件将负载施加至偏置构件时，偏置构件上的转矩转移