As an excellent high-temperature engineering material, Si3N4 ceramic block has the most advantage in its application in high temperature fields. The future development direction of Si3N4 is: (1) to fully utilize and utilize the excellent characteristics of Si3N4 itself; (2) to develop some new flux during the sintering of Si3N4 powder, to study and control the optimal composition of existing flux; (3) to improve milling , molding and sintering process; (4) development of Si3N4 and SiC and Other Materials, in order to obtain more high-performance composite materials. Silicon Nitride Ceramic Block,Silicon Nitride Plate,Customized Silicon Nitride Ceramic Plate,Refractory Ceramic Block Dongguan Haikun New Material Co., Ltd. , https://www.hkceram.com
Gear pump into the process of the cam when the convex part of the turn after the spring force under the action of the plunger down, the upper plunger space (known as the pump chamber) to produce a vacuum, when the plunger After the oil inlet hole on the plunger sleeve is opened, the diesel fuel filled in the body oil passage on the gear pump enters the pump oil chamber through the oil hole, and the plunger moves to the bottom dead center, and the oil finishes. When the camshaft turns to the convex portion of the cam, the plunger body is compressed and the plunger moves upward to compress the fuel, and a part of the fuel flows back to the upper part of the gear pump body through the oil hole Oil chamber. When the plunger top cover the upper edge of the sleeve into the oil hole, due to the small clearance between the plunger and sleeve (0.0015-0.0025mm) so that the top of the plunger pump chamber becomes a sealed oil chamber, the plunger Continue to rise, the pump oil chamber pressure rapidly increased, pump oil pressure> spring force of the valve + high pressure tubing remaining pressure, open the valve, high pressure diesel oil into the high pressure tubing through the injector spray Into the combustion chamber. Plunger upward oil supply, when up to the plunger on the chute (stopping edge) and the sleeve connected to the oil return hole, the low pressure oil pump chamber and the plunger head of the hole and the radial hole And chute communication, a sudden drop in oil pressure, the oil valve in the spring force quickly closed, stop the fuel supply. After the plunger has to go up, when the convex part of the cam turn, under the action of the spring, the plunger down again. At this point they started the next cycle.