Single-feedback-channel vortex cavity type pressure pulse generating device

The invention provides a single-feedback-channel vortex cavity type pressure pulse generating device, and relates to the technical field of underground equipment. The single-feedback-channel vortex cavity type pressure pulse generating device comprises an outer pipe, and an upper connector and a lower connector are connected to the two ends of the outer pipe in a screwed mode; a single-feedback-channel vortex cavity type jet oscillator is arranged in the outer pipe and comprises a base plate and a cover plate, the single-feedback-channel vortex cavity type jet oscillator comprises an inlet and an outlet which communicate with the outer pipe to form a fluid channel for fluid to pass through, the single-feedback-channel vortex cavity type jet oscillator comprises a flow guide block, the flow guide block is arranged in the single-feedback-channel vortex cavity type jet oscillator to divide the single-feedback-channel vortex cavity type jet oscillator into a jet oscillation cavity, a vortex cavity and a feedback