Thermostatic valve with sleeve, thermal engine associated with a cooling circuit including such valve, and method for making the sleeve for such valve
A technology for a heat engine and a thermostat, which is used in the manufacture of bushings for the valve and the field of heat engines, can solve the problems of complex and inconvenient, damaged seals, improperly tightened seals, etc., and achieves the effect of simple manufacturing.
Inactive Publication Date: 2010-08-18
VERNET SA
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Problems solved by technology
In practice, the manufacture of such bushings is complex and inconvenient: the push-back operation requires complex devices and there is a risk of damaging the seal or improperly tightening it, thereby reducing the sealing performance of this seal
Method used
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Embodiment Construction
[0019] Figures 1 to 3 show a valve 10 adapted to regulate fluid entering a valve body 20 through a bore 21 and leaving this body 21 through one and / or the other of the bores 22 and 23 after passing through a regulating chamber 24 On the one hand, the holes 21, 22 and 23 lead to this regulating chamber 24, on the other hand, in this regulating chamber 24 are arranged a movable bush 30 and a thermostatic element 40 for controlling the movement of this bush. The valve 10 is used, for example, in the cooling circuit of a truck engine: the cooling liquid circulating in this circuit under the action of the driven pump is sent from the engine to the orifice 21 to supply the valve, which passes the fluid according to its temperature as described below. Part or all of this is sent to bore 22 and / or to bore 23 to condition this incoming fluid, bore 22 is connected to a passage commonly called a bypass passage for leading back to the engine, and bore 23 is connected to such a passage - T...
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According to the invention, the thermostatic valve (10) includes, on the one hand, a mobile sleeve (30) for adjusting the flow of fluid through the valve body (20), said sleeve comprising a tubular body (31) provided with peripheral sealing fittings (32, 33, 34) adapted for interaction by sealed contact with the fixed seats (25A, 26A, 27A) in order to stop the fluid flows between the openings (21, 22, 23) defined by the valve body and, on the other hand, a thermostatic member (40) including a fixed portion (42) rigidly connected to the valve body and a fixed portion (41) movable in translation in the direction of the axis (X-X) of the sleeve under the action of a volume variation of a thermo-expansible material, the sleeve being kinematically connected to the mobile portion so that the movement of the mobile portion relative to the fixed portion controls the movement of the sleeve relative to the seats. In order to easily and economically improve the tightness of the contact between the sleeve and the seats, the body and the sealing fittings are respectively made of a thermoplastic material and an elastomer that are selected to be successively injection-moulded so that, at the release of the mould after the elastomer injection, the thermoplastic material and the elastomer adhere together due to a chemical, physical and / or physico-chemical effect.
Description
technical field [0001] The invention relates to a thermostat valve, in particular for a fluid circuit of a cooling fluid of a heat engine, and to a heat engine associated with this cooling fluid circuit. The invention also relates to a method of manufacturing a manchon for the valve. Background technique [0002] Valves with regulating bushes whose movement is controlled by a thermostatic element are usually equipped in cooling circuits associated with large-volume heat engines, used in particular in trucks and certain motor vehicles, which require The flow rate of the cooling fluid is greater than that required for a smaller volume heat engine for which the thermostat valve is a gate valve. [0003] In particular, the bushings used may generally have a so-called balancing stop, that is, a stop such that, by means of a thermostatic element, the pressure difference on both sides of the bushing wall in the direction of the bushing's movement is substantially zero, whereby Th...
Claims
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IPC IPC(8): G05D23/13
CPCG05D23/022Y10T137/7737
Inventor A·布卢瓦N·鲍狄埃T·马罗
Owner VERNET SA