Last year, engineers from smart parts and humphrey products crowded into a conference room in loyalhanna, pa, like football players, drafting a game plan that they plan to make in an extraordinary sport Score, that is paintball game design contest. At the close of the meeting, engineers were prepared to develop a new solenoid valve, which they felt would set new standards for paintball guns that would throw paint-containing pellets on their opponents. But this is not to deny the conventional valve. New valves must be backward compatible to match existing valve pins. It should be easy to maintain. In addition, it should have better performance than existing valves. How excellent? a lot of. For example, engineers are aiming to increase their workforce by 125% with regard to the pressure on the valve, a key parameter. They succeeded in reaching their goal. The new valve is the result of a tripartite collaboration between smart parts, pneumatic technology supplier humphrey and humphrey's Japanese partner koganei, whose performance surprised the market. As a 7v device, it has a higher rated pressure (225 psig vs 100 psig), faster launch frequency (28 balls vs 24 balls per second) than the competitor's sample, and more equipment than the previous valve Short cycle (ie on and off) time. Engineers at humphrey said the tests showed that despite the rated pressure of 225 psig, the valve still seals well at 300 psig. Relative to the smart parts used before the valve, the new valve parts fewer and lighter weight. Although the smart parts do not reveal the actual weight of the valve, the company said it is 1.1 gm lighter than the previous valve. The smart parts company will launch the new valve on a nerve paint gun released in November. Solenoid valves play a very important role in paintball guns. It makes the intake air flow through the orifice, drive the cylinder axis stretching, ignition cylinder expansion and contraction, the paintball gun cycle shooting. This valve also allows the pressure gas from the previous ignition cycle to be expelled from the other side of the cylinder. Stopping for a twelve-month design project - six months shorter than usual, according to Humphrey - is filled with common hour-stops, but repeated experiments Bring some interesting innovations. For example, when Humphrey's team delivered the first sample, smart parts reported that the valve did not fire properly. Humphrey's team was very confused, they asked smart parts company's project engineer ed telford and his team, discussed in detail the details of the control circuit. rich mcdonnell, humphrey's director of commercial research and development, said: "At that time we looked at the circuit and redraw the waveform to extend the working hours, which is the time it takes for the coil to push the piston." With this effort, Changes, and humphrey companies use other methods to optimize the spring, armature and guide the plunger, reducing the entire cycle time. Ultimately, humphrey expects its design to reduce the total cycle time from 39 msec to 36 msec. In other design decisions brought by collaborative efforts, the humphrey research and development team moved the seal from the plunger to the valve body to avoid leakage and seal failure. In the valve design project, humphrey's engineers found that when the seal was installed on the plunger, the high pressure caused by the movement of the valve could cause the seal to come off. McDonnell said, "We considered several alternatives, including gluing, but we found the best solution was to secure the seal to the valve body and to place the plunger against the seal." Assembly is a key step further Say, they used to prevent misuse of the ring, to prevent the user to open the paintball gun after reassembly, while doing so to ensure the warranty is valid. In addition to these innovations, smart parts has asked humphrey to change the more expensive part of an older design that adds a lot of difficulty to the installation, maintenance and repair work - the welding connection between the valve and the printed circuit board. smart parts would like to replace this connection with a connector that matches their specified plug-in connector so that no welding operation is required. The humphrey engineers met their needs, but then they had to work on another issue with the smart parts team - worried that they might accidentally pull the connector out of the valve assembly. The solution is to humphrey the connector integrated in the spiral >> tube rack. The company has also developed a guide frame and body cover made of aluminum material instead of the traditional injection molding plastic. This, according to Telford, is considered a good choice by the market. Downward compatible pin is another design point. smart parts wants the valve orifice to match the previous valve. To do this, Humphrey's engineers reversed the position of all the ports on the valve body and used the autocad software to match the interface. Telford said the most rewarding lesson from this project was that "you should look for a supplier that fully meets your needs, not the kind of vendor that has changed your mind." Tips for quick shooting Schematic representation of the smart parts of the paintball gun valve basic principle of operation, the upper figure shows the state of the cylinder contraction, and the lower part of the figure shows the cylinder expansion state. In this configuration, sw1 and sw2 represent two proximity sensors for sensing the position of the cylinder, a and b represent two ports of the cylinder, ea and eb represent outlets, and the schematic diagram of the entire movement is shown on the right Show. The bottom table shows the reaction times of the valves for virtually different flow coefficients and two different models. (Note that the reaction time is asymmetric due to the hysteresis caused by the attenuation of the magnetic flow.) To speed up the firing rate of new paintball guns, design engineers seek to speed up the valve reaction times, ie increase the pressure and flow rate, Increase voltage and optimize coil design. In general, common methods include reducing the air gap distance (the strength of the magnetic field is the reciprocal of the square of the gap distance), and using low inductance / high power Of the coil, so that compared with the traditional coil, you can generate a magnetic field faster. The results of it? smart parts paintball gun valve response time is only a district of 6 ~ 7msec, compared with the normal valve 10 ~ 11msec, so that you can launch more paintball! Contact national editor paul e. Teague,. Some of the valve design challenges that smart parts and humphrey have to face in developing a paintball gun are: â— Sealed Compatibility â— High Voltage Operation â— Pins â— Downside Compatibility â— Fast Response Times â— Valve Encapsulation â— Electronic Connectors Integration of the installation
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