Oil supply hydraulic adjusting device for piston cooling nozzle performance experiment bench

Abstract

The invention discloses an oil supply hydraulic adjusting device for a piston cooling nozzle performance experiment bench. The oil supply hydraulic adjusting device comprises a stepping motor, a lead screw, a top plate, a supporting cylinder, a moving plate, a follow-up cylinder, a moving shaft, an oil blocking cylinder, an oil returning pipe, a linear bearing, a bearing pedestal and an auxiliary oil tank; the auxiliary oil tank is connected with an oil supply source and a piston cooling nozzle, and the bearing pedestal is mounted on the auxiliary oil tank and provided with an oil drainage groove and an oil drainage hole; the moving shaft can vertically move to change the oil drainage amount in the oil drainage groove; the moving shaft is sequentially driven by the follow-up cylinder and the moving plate, and the moving plate is connected with and driven by a rotating shaft of the stepping motor through the lead screw; the stepping motor is adopted to drive the lead screw to rotate, and then drives the moving shaft to vertically move, the oil drainage groove and the oil drainage hole formed in the bearing pedestal are blocked through the moving shaft, the magnitude of the oil drainage output of the oil drainage groove and the oil drainage hole is changed, bypass throttling pressure adjustment can be formed, and therefore the aim of adjusting output pressure is achieved; and running of the device cannot cause temperature rise of detection medium engine oil, and use is easy and convenient.

Description

technical field [0001] The invention relates to an accessory of a performance test bench of a piston cooling nozzle, in particular to an oil supply hydraulic adjustment device used for a performance test bench of a piston cooling nozzle. Background technique [0002] Piston cooling nozzle (ie PCN) is an important part of the automobile engine, and its performance has an extremely important effect on the lubrication and cooling effect of the moving piston of the engine; the test curve of the piston cooling nozzle performance experiment is as follows figure 1 shown. [0003] The piston cooling nozzle is composed of a nozzle body and a one-way valve. Based on the diversity of automobile engine specifications and models, there are many specifications and models of piston cooling nozzles, but their structural forms are roughly similar. [0004] The switch characteristics and flow characteristics tests of the piston cooling nozzles are factory inspection items, which require 100%...

AI Technical Summary

Problems solved by technology

[0018] The above-mentioned traditional adjustable pressure oil supply devices all have the following disadvantages: due to the heating of the motor, oil pump, solenoid valve, etc., the detection medium oil will produce a large temperature rise

[0020] Although the above-mentioned air pressure loading oil supply device used for the piston cooling nozzle performance test bench does not cause the temperature rise of the engine oil and realizes the adjustment of the oil supply pressure, but because it utilizes the compressibility of the air and the flow rate of the intake and exhaust To control the loading and unloading rate of the output oil supply pressure. For different types of piston cooling nozzles, the loading and unloading rate requirements required by the experimental test are different. There are many product models of piston cooling nozzles, and the product models of piston cooling nozzles need to be replaced frequently. In this way, it is necessary to frequently adjust the flow rate of air intake and exhaust, which is time-consuming and inconvenient to users.

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