Two-position three-way electromagnetic valve
A two-position three-way, solenoid valve technology, applied to multi-way valves, valve details, valve devices, etc., can solve problems such as high heat generation, decreased electromagnetic suction, and increased weight
Active Publication Date: 2013-02-13
BEIJING AEROSPACE PROPULSION INST
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Problems solved by technology
Long-term energization will inevitably bring considerable energy loss, which will greatly reduce the net power output capacity of the fuel cell power generation system
In addition, long-term energization generates a lot of heat. If the heat dissipation capacity is not enough, the temperature rise of the coil will cause the suction force of the electromagnet to decrease, thereby reducing the reliability of the valve.
Solving the heat dissipation problem can only be achieved by increasing the volume of the electromagnet, and the ensuing problem is the increase in weight, which is not allowed by the system
[0004] Additionally, from figure 1 It can be seen that the valve core and the armature move together through the connection of the valve stem. The valve stem and the valve core are integrally processed, or threaded, welded, etc., but when the overall axial dimension of the valve is relatively large, it is prone to poor alignment In severe cases, it will affect the sealing performance
Especially for two-position three-way valves, good sealing performance is required at the upper and lower valve ports, so the coaxiality requirements of the armature-valve stem-spool assembly are very strict, even if the valve stem and valve core are integrally processed, in There are also hidden dangers of poor alignment during processing or when screwing with the armature, which will eventually affect the sealing performance and greatly reduce the reliability of the valve
Method used
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[0022] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.
[0023] like figure 2 As shown, the top of the valve core 17 is a ball head, the bottom of the valve stem 15 is processed with a round hole, the ball head of the valve core 17 extends into the round hole, the pin 16 passes through the lower end of the valve stem 15 and the ball head, and There is a certain gap between the pin 16 and the inner wall of the pin hole on the ball head, so that the ball head at the top of the valve core 17 forms a floating connection with the valve stem 15 lower end.
[0024] like image 3 As shown, the upper valve body 9 includes two inner chambers, A chamber and B chamber. Inside the lower valve body 10 is a C cavity. The main body of the spool 17 is located in cavity A of the upper valve body 9, the ball head at the upper end of the spool 17 extends into cavity B, the lower valve body 10 is located un...
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The invention belongs to a chemical and fuel cell power generation system, and particularly discloses a two-position three-way electromagnetic valve. The valve comprises an upper valve body, a lower valve body, a guide sleeve and a coil frame, wherein the shell is arranged outside coil frame, and a frame upper end cover and an upper magnetic conductor are arranged between the coil frame and the shell; an armature is arranged in the coil frame; a valve core and a valve rod which is connected with the valve core in a floating way are arranged in cavities of the upper valve body and the lower valve body; magnetic steel is arranged at a middle position outside the coil frame; and coils are wound above and below the magnetic steel respectively. By arranging the magnetic steel which is made of a circular permanent magnetic material outside the coil frame, the magnetic steel, the armature, the shell and the upper magnetic conductor form four closed magnetic loops, so that switching of medium flowing direction can be realized, the energy consumption of the system can be effectively reduced, and the reliability can be improved; in addition, the original valve core is changed into a structure in which the valve core and the valve rod are connected in the floating way; a limited swing angle is utilized by the valve core; automatic alignment is realized for sealing through a guide section on the valve body; and thus, sealing property is guaranteed, and the reliability of the valve is improved.
Description
technical field [0001] The invention belongs to chemical industry and fuel cell power generation system, in particular to a two-position three-way solenoid valve. Background technique [0002] The regenerative fuel cell power generation system requires a two-position three-way solenoid valve to supply cooling water for the power generation and electrolysis subsystems through the switching of two outlets; in the secondary cooling system circuit, a two-position three-way solenoid valve is also required to switch cooling The flow direction of the medium (ethylene glycol) to meet the different needs of power generation and electrolysis conditions. [0003] Ordinary two-position three-way solenoid valve switches the flow direction of the medium by energizing and de-energizing the coil. like figure 1 As shown, the sealing force of the valve outlet closed in the power-off state is provided by the return spring installed inside the valve body; the sealing force of the valve outlet...
Claims
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IPC IPC(8): F16K11/044F16K31/06
Inventor 任志彬周连刚黄应坤
Owner BEIJING AEROSPACE PROPULSION INST