| 摘要 |
A load dependent valve for railway cars including first and second springs, each having one end contacting a balance piston. A first spring adjusting mechanism for adjusting the compressive force of the first spring and a second spring adjusting mechanism for adjusting the compressive force of the second spring. A valve seat disposed in an air supply passage which is connected between an air supply chamber and an output chamber. An air supply valve is biased to seat on the valve seat. An exhaust valve rod having a valve tip facing the air supply valve and fitting the air supply passage and has an exhaust air bore, one end opens at the valve tip and the other end opens at the exhaust chamber. The control piston including a control piston diaphragm fixed to the main valve body and fixed to the control piston. The balance piston includes a balance piston diaphragm which is fixed to the main valve body and also is fixed to the balance piston main body. A plurality of first fins fixed around the piston main body on the low pressure side along the direction of movement facing its upper edges to the diaphragm of the same piston, while the side opposite to that receiving the air pressure of at least one piston of the two pistons is set at a pressure lower than the minimum value of the air pressure. A plurality of second fins located in the main valve body and placed between the first fins, and in which the first surface which connects the upper edges of the first fins on the side of the diaphragm intersects with the second surface which connects the upper edges of the second fins on the side of the diaphragm.
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