58results about How to "Avoid mixed flow" patented technology

The invention discloses an automatic sand-shakeout and ring-stripping device for piston rings. The automatic sand-shakeout and ring-stripping device for the piston rings comprises a sand cleaning mechanism, wherein the sand cleaning mechanism comprises a sand loosing device used for loosening the molding sand at the riser end of a casting, a sand suction device for sucking sand after loosening and a sand box positioning device; the sand-shakeout and ring-stripping mechanism is arranged on one side of the sand cleaning mechanism and the sand-shakeout and ring-stripping mechanism comprises a sand-shakeout manipulator, a ring-stripping manipulator, a ring-stripping discharge head, a sand-shakeout air-hammer and a sand ring sieving device, wherein the sand-shakeout manipulator is used to grab and carry sand boxes; the ring-stripping discharge head is fixed on the sand-shakeout manipulator and is used for selectively extruding the piston ring on the casting; the ring-stripping manipulator is arranged on the sand-shakeout manipulator and can move along a vertical direction relative to the sand-shakeout manipulator; the ring-stripping manipulator is used to grab a casting riser that passes through a bore through a riser; the sand-shakeout air-hammer is arranged in a sand-shakeout position and is used for selectively impacting sand box; the sand sieving device is arranged below the sand-shakeout air-hammer and is used for receiving and separating molding sand and piston rings. The automatic sand-shakeout and ring-stripping device for the piston ring can realize automatic sand-shakeout and ring-stripping, the operation efficiency is high, and the operation strength is low.

The invention discloses a novel heat exchanger core, and belongs to the technical field of mechanical design. The novel heat exchanger core comprises etching plates, forming plates and partition plates; heat exchange runners are etched on the etching plates, and each heat exchange runner is composed of a direct runner and an oval runner which are alternatively arranged; the direct runners and the oval runners are communicated; the long axes of the oval runners and the central axes, in the liquid flowing direction, of the direct runners are located on the same straight line; the n etching plates and the m forming plates are alternatively arranged, wherein n is larger than or equal to 1, m is larger than or equal to 1, and m and n are both positive integers; the position between the etching faces of adjacent etching plates and the forming plates, the position between the two adjacent forming plates and the position between the etching faces of the two adjacent etching plates are each provided with one partition plate; according to the heat exchanger core, the characteristics of a micro-channel heat exchanger and a plate type heat exchanger are integrated, the use condition that the working medium cleaning degree is not high is met, and the novel heat exchanger core can be particularly suitable for the cooling working procedure of natural gas of an offshore work platform.