2results about How to "Small flow cross section" patented technology

The cell detection micro-fluidic chip comprises a filtering structure and a washing structure, the filtering structure is provided with a filtering cavity and a filtering part, the filtering part is arranged in the filtering cavity, and the filtering part is provided with a plurality of filtering channels which are arranged at intervals in the first direction; the washing structure is provided with a washing channel communicated with the filtering cavity, and the flow direction of the washing channel and the flow direction of the filtering channel are arranged at an angle. By arranging the filtering structure, large-volume cell clusters can be filtered, and single cells can pass through the filtering channel, so that a subsequent channel is prevented from being blocked, and the influence of the cell clusters on the accuracy of a cell quantity detection result is reduced. Furthermore, a washing channel is arranged so that cleaning liquid can be conveniently conveyed to the filtering cavity, then the filtering part can be cleaned, large-volume cell clusters can be discharged, the filtering part can conveniently carry out next-time filtering, the filtering structure does not need to be disassembled and assembled, operation is easy and convenient, the detection efficiency can be improved, and then the requirement for real-time detection can be better met.

This application provides a hydraulic clearance adjuster, an engine, and a vehicle. The hydraulic clearance adjuster includes: a housing; at least a portion of a plunger disposed within a first receiving cavity, with an oil drain channel formed between the outer peripheral surface of at least a portion of the plunger and the side wall of the first receiving cavity, and a first working cavity formed between the bottom of the plunger and the bottom of the first receiving cavity, the plunger being movably disposed relative to the housing to change the volume of the first working cavity; a first annular gap formed between the inner ring of a seal and the outer peripheral surface of the plunger, the first annular gap communicating with the first working cavity; a second annular gap formed between the outer ring of the seal and the inner side wall of the housing, the second annular gap communicating with the oil drain channels located on both sides of the seal; and a communicating channel formed on at least one of the seal and the housing, the communicating channel communicating with the oil drain channels located on both sides of the seal. The hydraulic clearance adjuster dynamically adjusts the flow cross-section of the oil drain channel according to the oil pressure, thereby precisely controlling the hydraulic stiffness damping.