SU947512A1 - Brake disk with heat pipe type cooling system - Google Patents

Description

The invention relates to mechanical engineering and can be used in devices requiring intensive removal of generated heat, for example, in brakes.

A known brake disc with cooling type is a heat pipe mounted on a stationary shaft and comprising a housing filled with coolant with face surfaces of friction and heat generation and a condensation zone located on the periphery of the brake press, as well as an impeller with blades fixed on the shaft fl.

 The disadvantage of this brake disc is that the coolant condensate does not fall directly on the internal surfaces of friction and heat generation, but moves along the capillary inserts, which reduces the thermodynamic cooling efficiency of the brake disc.

In addition, when the condensate of the coolant is drawn by the blades of the impeller, it moves only to the center of the impeller, while for effective cooling the condensate of the coolant must be fed directly to the surface

friction and heat generation. Such movement of the condensate of the coolant from the condenser to the evaporator of the brake disc decreases. The thermodynamic cooling efficiency of the brake disc, which is especially evident at high frequencies of its rotation.

The purpose of the invention is to increase the cooling efficiency.

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This goal is achieved by the fact that in a brake disk with a cooling system of the Heat Pipe type, mounted on a stationary shaft to a housing that is filled with a heat carrier with front surfaces of friction and heat generation and a condensation zone located in the peripheral part of the brake disk and the impeller blades,

20 mounted on the shaft, the blades are made hollow with nozzles in the middle part, facing the surfaces of friction and heat generation, and valves with a flat two-way valve

25 at the end of each blade located in the condensation zone.

FIG. 1 shows the brake disc, transverse; in fig. 2 section aa in FIG. in fig. 3 30 location of the valves of the impeller valves when the dial is rotated clockwise; in fig. 4 - the location of the valves of the impeller valves when the disk is rotated counterclockwise.

The brake disc includes a housing 1 with workers, for example, face surfaces on 2 friction and heat generation, an evaporator 3, a condenser 4, a heat carrier 5 circulating inside the housing 1 with a change in its state of aggregation, and a crush b, the blades of which are hollow in the form of pipelines 7, at one end of which nozzles 8 are located, facing the surfaces 2 of friction and heat generation, and at the second end of the pipeline 7 of the impeller. valves 9 are placed with flat jlO taps opening inside valve 9, and the axis of the valve holes s 9 and the axis of the impeller 8 nozzles disposed between a b 90.

The valves of the 9 blades of the impeller are placed in the cavity of the condenser 4 of the housing 1 of the brake disc in the medium of liquid condensate of the coolant 5, the brake pads 11 are in contact with the surface 2 of friction and heat generation of the housing 1. The disk rotates in the bearings 12.

The brake disc works as follows.

During rotation of the brake disk 1, the working fluid – heat transfer fluid 5 is in the cavity of the capacitor 4 and rotates with the housing 1 under the action of centrifugal force. When the brake pads 11 are applied to the surface 2 of the housing 1, heat is generated due to the friction pads 11 against the wall 2 of the housing 1 .

In order to remove heat from the surface 2 of friction and heat generation, the latter is irrigated from the inside by a flow of sprayed coolant 5, which is pulled out of the nozzle holes 8. Condensate of the coolant 5 in the liquid phase, located in the cavity of the condenser 4, the rotating housing 1, the brake disc Under the action of centrifugal force, it opens the valves 10 of the valves 9 of the impeller b (the anti-contraction valve 10 closes) and flows through the pipelines 7 to the nozzles 8, and from there sprays directly onto the inner surface

2 friction and heat generation of the brake disc body. The sprayed droplets of the heat transfer medium 5, falling on the heated walls of the evaporator 3, evaporate almost instantaneously, turn into steam, and collect the generated heat from the surface 2 of the housing 1 of the brake disc. Then, under the action of the centrifugal forces of the rotating brake disk housing 1, the heat carrier pair 5 is again moved into the cavity of the capacitor 4, and the cycle operation of the heat pipe of the brake disc is repeated, the device can work reversibly

Thus, the invention ensures the operation of the brake disc according to the principle of spraying the coolant, which eliminates drying, overheating and burnout of the walls of the evaporator. And this disadvantage, as is known, limits the scope of application of brake discs with cooling such as the Heat Pipe.

The blades in the form of hollow pipelines do not only increase the reliability and durability of the device, but most importantly, the efficiency of cooling the brake disc at high frequencies of its rotation.

Claims (1)

Invention Formula Brake disc with cooling system type Heat pipe mounted on a stationary shaft and containing a housing filled with coolant with face surfaces of friction and heat generation and a condensation zone located around the periphery of the brake disc, as well as an impeller mounted in the housing with blades fixed to a different that, in order to increase the efficiency of cooling, the blades are made with floors with nozzles in the middle part facing the surface of friction and heat generation, and valves with flat two-sided The shutter on each end of lrpastey disposed in the condensation zone. Sources of information taken into account in the examination 1, USSR Author's Certificate No. 696203, CL F 16 D 65/12, 1977. (Prototype). FIG. D1L. FIG. 2