KR930004565B1 - Temperrature-sensitive type hydraulic fan coupling device - Google Patents

Abstract

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Description

Thermostatic Fluidized Fan Coupling Device

1 is a partial cross-sectional view of a thermosensitive fluidic fan coupling device showing an embodiment of the present invention.

FIG. 2 is an enlarged view showing a state of collecting oil when the apparatus shown in FIG. 1 is stopped. FIG.

3 is an explanatory diagram showing the state of oil collection at the low temperature start and low temperature operation of the apparatus shown in FIG.

4 is an explanatory view showing the state of oil collection during high temperature start-up and high temperature operation of the apparatus shown in FIG.

5 is a longitudinal cross-sectional view corresponding to FIG. 1 showing another embodiment.

FIG. 6 is a plan view of the partition board unit of the A-A line of FIG.

7 is a longitudinal sectional view of a coupling device showing a conventional example.

8 is a characteristic curve comparing the performance of the present invention and the prior art.

* Explanation of symbols for main parts of the drawings

1: Rotating Drive 2: Sealer Box

2 ': Case 2 ": Case cover

3: shaft center opening 4: bearing

5: rotating member 6: cooling fan

7: Torque transfer room 7 ': Torque transfer gap

8: driven disc 9: groove

10: partition plate 11: oil chamber

12: outflow adjustment hole 13: thermostat

14 valve member 15 dam

16: circulation channel 17: interlocking rod

18: Children's oil chamber 19: Distribution means

The present invention generally controls the fan rotation for engine cooling in automobiles according to the temperature change around the engine, and continuously adjusts the cooling air flow amount according to the driving condition to supply the engine to the temperature sensitive fluid fan coupling. Relates to a device.

As a conventional fan coupling device of this kind, as shown in FIG. 7, the inside of the sealer box by the cover 23 'and the case 23 "has a partition plate having an outflow adjusting hole 24'. 24 is partitioned into the oil chamber 25 and the torque transmission chamber 26 in which the drive disk 22 is incorporated, and further, the torque transmission chamber 26 communicates with the oil chamber 25 side. A circulation flow path 27 is provided following the pumping function portion by the dam 28, and at least one of the inlet 27 'and the outlet 27 " Even if there is, the outlet port 27 "is formed on the circumferential flow path 27 in which the partition 27 is maintained around the inner circumferential wall surface of the oil chamber 25 so as to be located above the oil surface existing in the oil chamber 25. It was a semicircle and provided in the tip opening part of the arc-shaped groove passageway 29, and was comprised.

However, these conventional fan coupling devices have a torque transfer chamber 26 in a flow path by oil in the oil chamber during stopping when the circulation passage 27 is stopped under the oil level in the oil chamber 25. The natural reverse flow to the side prevents the collection in the torque transfer chamber, prevents the sudden rise of the fan rotation immediately after the engine is started, and prevents the occurrence of abnormal fan noise and effectively promotes warm-up operation during cold weather. Can be achieved, but when the engine is restarted, there is a tendency for the reduction or prevention of the phenomenon of "interlocking rotation" over time.

That is, when the engine is stopped under the oil level of the oil chamber 25 in the state of the valve member in which the outlet adjusting hole 24 'of the partition plate 24 is opened in the high temperature operating state. During the stop, a large amount of oil collects in the torque transmission chamber 26 due to natural outflow from the oil discharge chamber adjusting hole 24 'caused by the oil in the oil chamber. Therefore, when the engine is restarted after a certain time, As shown by the performance characteristic curve B of FIG. 8 over time, it had a problem which produces the said "interlocked rotation" on the driven side. In addition, since the sealer box is located on the driven side, the weight of the sealer box side with the fan F and the large moment of inertia make the use of the high load bearing inevitable and increase the product weight. Tended to.

In addition, since the thermosensitive body is attached close to the front surface of the cover 23 ', it is susceptible to heat influence from the cover 23' in relation to the structure of the sealer box made of ordinary aluminum alloy material, and changes in temperature around the outside. Accordingly, there is a tendency to have a problem that hysteresis occurs in the rotation control characteristics by causing an abnormality in the deformation in the thermosensitive body.

Accordingly, an object of the present invention is to solve the conventional problem and to prevent the occurrence of abnormal fan noise and to promote turbulence by preventing the sudden rise of the fan rotation immediately after the engine is started, the sealer box is provided on the driving side. And an idle oil chamber which is located radially outward from the dam on the side of the sealer box and communicates with the torque transfer chamber, and at the same time the oil is transferred to the oil chamber and the torque chamber only when stopped in the partition plate. It is configured to have a circulation means for communicating the seal, and even when stopped at the high temperature operation state, the torque transmission chamber is driven by the centrifugal force acting on the oil generated by the rotation of the sealer box side by the subsequent engine start. The oil collected is discharged immediately to the children's oil chamber, and the oil is almost left in the torque transmission chamber. The interlocking rotation to the driven side can be limited to a very short time immediately after the engine is started, and in connection with the configuration of the sealer box on the drive side, a bearing is provided through the shaft opening on the front cover side of the sealer box. By attaching the cooling fan and supporting the rotating member made of steel as the driven side, it reduces the load on the driven side with the cooling fan, and also makes the light load bearing available by making the moment of inertia small. The high speed rotation on the side facilitates the cooling effect, and the rotation member can be installed away from the heat generating section, for example, the torque transmission gap and the oil chamber, so that the heat transfer path can be sufficiently long, and the bearing and the rotation member Even if the temperature of the oil inside rises because steel materials with low thermal conductivity can be used Fan coupling without the defect concern a rotation control characteristics due to thermal influence by heat transfer from the heat, and the rotary member from the cover on gakpaen onche and sense to provide a ring device.

The above object is a fluidized fan for controlling rotational transfer to the driven side by increasing or decreasing the effective contact area of oil in the torque transfer gap between the drive side and the driven side in response to a temperature change in the outer periphery according to the present invention. In the coupling device, the shaft center part of the rotating member formed by rotating the sealer box which consists of a case and a case cover, and attaching a thermostat on the front surface and a cooling fan to the outer side through a bearing in the shaft center opening part of the said case cover side. And a driven disk fixed to the rear end of the rotary member located inside the sealer box to maintain a torque transmission gap near the outside of the driven disk and on the opposing inner circumferential surface of the sealer box side. A circular groove portion on the rear side of the disk is partitioned by a partition plate to provide a torque transfer chamber that communicates with the oil chamber and the torque transfer gap. At the same time, an oil leakage adjusting hole communicating with the oil chamber from the oil chamber to the torque transmission chamber is installed in the partition plate, and the oil leakage adjusting hole is interlocked with the interlocking rod in response to the deformation caused by the temperature change of the temperature sensing element. Built-in valve member for opening and closing, protruding to the inner circumferential surface side of the sealer box facing a part of the outer circumferential surface of the driven disk where oil is collected at the time of rotation, and installing a dam, and near the dam in front of the rotation direction And a circulation flow passage of oil passing through the inside of the driven disk in the radial direction to the oil chamber side, and located outward in the radial direction from the dam on the sealer box side to the torque transfer chamber. A distribution means for installing an idle oil chamber and communicating the oil chamber with the torque transfer chamber only when the diaphragm stops. Compared with the above, the distribution means is achieved by means of a temperature-sensitive fan coupling device composed of a single circular through hole provided in the center of the partition plate or a plurality of through holes arranged in the same circumference at the axial portion of the partition plate. do.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a longitudinal sectional view of a part of the temperature-sensitive fluidic fan coupling device of the present invention, FIG. 2 is an enlarged view showing the state of oil collection at the stop of FIG. 1, and FIG. 3 is a low temperature of FIG. Explanatory drawing showing the state of oil collection when it is started and operated in the off state, and FIG. 4 is the state of oil collection when it is started and operated in the state of FIG. 5 is a longitudinal cross-sectional view similar to FIG. 1 showing another embodiment, and FIG. 6 is a plan view of the partition board unit of the FIG. 5 line, and reference numeral 1 denotes a case 2 'and a case cover 2; The rotary drive body provided with the sealer box 2 which consists of ") consists of aluminum alloy materials, etc., This sealer box 2 may be formed integrally with the case 2 'side, or may be provided separately. Reference numeral 5 denotes the bearing 4 on the shaft center opening 3 on the side of the case cover 2 ". A rotary member which supports the base via its shaft, to be attached to sense onche 13 and the cooling fan on the outside (6) consisting of a bimetallic configuration etc. on the front of the driven shaft. (8) is a driven disk fixed to the rear end of the rotating member (5) located inside the sealer box (2), and at least one side or outer circumferential section near the outer side, i.e. the outer box and the sealer box (2). The torque transmission gap 7 'is maintained on the opposing inner peripheral surface of the side. Reference numeral 10 divides the circular recess 9 around the center of the rear side of the driven disk 8 to connect the torque transfer chamber 7 to the oil chamber 11 and the torque transfer gap 7 '. As the partition plate to be formed, the partition plate is provided with an oil outflow adjustment hole 12 communicating from the oil chamber 11 to the torque transfer chamber 7 side.

Reference numeral 14 denotes a valve member embedded in the oil chamber 11, which is the rotary member 5 which the thermosensitive member 13 deforms due to a temperature change around the outer circumference and moves accordingly. The outflow adjustment hole 12 on the side of the partition plate 10 is opened and closed in conjunction with the interlocking rod 17 formed by penetrating the shaft portion of the shaft. Reference numeral 15 denotes a dam protruding to the inner peripheral surface side of the sealer box 2 facing a part of the outer peripheral surface of the driven disk 8 in which oil is collected during rotation, and reference numeral 16 denotes a dam. A circulation flow path of oil passing from the torque transfer gap portion 7 'which is arranged side by side in the radial direction through the inside of the driven disk 8 in the front part of the rotational direction close to (15) and toward the oil chamber 11 side. to be.

Reference numeral 18 is, for example, an annular idler provided through the torque transfer chamber 7 in the radially outer side of the dam 15 on the side of the sealer box 2, and at the time of stop, the torque transfer chamber. (7) and the flow volume which collects in this idle oil chamber 18 is formed with the volume of about the same. Reference numeral 19 is a number of distribution means consisting of through-holes provided in the partition plate 10, the distribution means 19, the oil communicates the oil chamber 11 and the torque transmission chamber 7 only when stopped. The distribution means may include a single circular through hole (see FIG. 1) disposed at the center of the partition plate 10, or a plurality of through holes disposed on the same circumference at the axial portion of the partition plate (FIG. 5). And FIG. 6).

The thermosensitive member 13 is formed in a rectangular flat plate shape (see FIG. 1), and the valve member 14 is moved forward and backward with respect to the outflow adjustment hole 12 in accordance with a curved deformation in the front-rear direction or opened or closed. Alternatively, it may be employed in any one of forming in a vortex shape (FIG. 5) to slide the valve member 14 to the left and right with respect to the outflow adjusting hole.

Since this invention is comprised in this way, the seal box 2 is comprised on the rotational drive side, and the bearing 4 is interposed in the front wall part (case cover 2 ") of the front wall part of the seal box side. The driven side can be formed extremely lightly by supporting the rotating member 5 serving as the driven shaft to which the cooling fan 6 is attached and by placing the driven disc 8 on the driven side. Moreover, the high-speed rotation state at the side of the sealer box 2 provided as the drive side significantly promotes the cooling effect in the sealer box itself, and also has a bearing 4 and a rotating member 5 made of steel having low thermal conductivity. By the configuration that the cooling fan 6 and the temperature sensing element 13 are attached to each other, there is no fear of heat influence on the fan and the temperature sensing element due to heat generated inside the sealing box 2. From the dam 15 on the side of the sealer box 2 to the outside in the radial direction Distributing means (19) provided in the idle oil chamber (18) and the partition plate (10), which are provided with through-holes for allowing oil to naturally communicate with the oil chamber (11) and the torque transfer chamber (7) only when it is stopped. Even in the state in which a large amount of oil collects in the torque transfer chamber 7 after a high temperature operation, the torque transfer chamber side is moved from the torque transfer chamber side to the oil chamber 11 side during this stop. By means of the configuration of the idler oil chamber 18 which is in natural communication and has a volume approximately equal to the flow rate already collected in the torque transfer chamber 7 and the idler oil chamber 14, the seal box is used at a subsequent engine start-up. The oil collected in the torque transfer chamber 7 is immediately discharged toward the idle oil chamber 18 by the centrifugal force acting on the oil generated by the rotation of the (2) side and stored in the idle oil chamber. In delivery room (7) The oil is hardly remaining. There is such a state is shown as a performance characteristic curve (a) of claim 8, Fig.

As described above, the temperature-sensitive fluid-type fan coupling device according to the present invention is configured to rotate the seal box 2 and the driven disk 8 positioned on the driven side to reduce the weight of the driven side. The inertia moment can be reduced, the load on the driven bearing 4 can be reduced, and the life thereof can be extended. At the same time, the bearing for light load can be used, and the cooling effect in the seal box 2 itself is improved. Since the steel etc. which promote remarkably and low thermal conductivity can be used for the bearing 4 and the rotating member 5, the use of the fan made of resin becomes possible, and the heat transfer path is made long enough, and the internal oil temperature Even when the temperature rises, it eliminates the fear of the heat effect on the thermosensitive element 13, thereby exhibiting a control characteristic that can respond quickly according to the temperature change constantly, and the eye Since the oil chamber 18 is installed, immediately after the engine is started, the oil in the torque transfer chamber 7 is immediately discharged and stored in the idle oil chamber so that almost no oil remains in the torque transfer chamber 7. As a result, the "interlocked rotation" to the driven side can be suppressed for a very short time immediately after the engine is started, and the sudden rise of the fan rotation can be prevented to prevent abnormal fan noise and promote warm-up operation. Is a very useful thermosensitive fluidic fan coupling device that can effectively prevent "

The present invention is not limited to the above-described embodiments and can be variously changed and modified without departing from the scope and spirit of the present invention.

Claims (3)

In the fluidized fan coupling device in which the effective contact area of the torque transmission gap oil between the drive side and the driven side is increased or decreased in response to a temperature change around the outside, the rotational transmission to the driven side is suppressed. ') And the sealer box (2) consisting of a case cover (2 ") are rotated, and a thermosensitive member (13) is provided on the front surface via a bearing (4) in the shaft center opening (3) on the case cover (2") side. And the cooling fan 6 on the outside to support the shaft core portion of the rotating member 5 and to fix the driven disk 8 to the rear end of the rotating member located inside the sealer box 2. A torque transmission gap 7 'is maintained on the inner circumferential surface near the outer side of the driven disk and on the side of the sealer box 2, and the circular groove 9 on the rear side of the driven disk 8 is partitioned. Partitioned by the plate 10, the oil chamber 11 and the torque transfer gap 7 ' In addition to forming the delivery chamber (7), the partition plate is provided with an oil outflow adjusting hole (12) communicating from the oil chamber (11) to the torque transmission chamber (7) side, and further inside the oil chamber (11). According to the deformation caused by the temperature change of the temperature sensing member 13, the driven disk 17 interlocks with the interlocking rod 17 to open and close the outflow adjustment hole 12, and the oil is collected during rotation. The dam 15 is provided by protruding to the inner circumferential surface side of the sealer box 2 facing a part of the outer circumferential surface of 8), and the inside of the driven disk 8 is diameter in front of the dam in close proximity to the dam. The oil circulation passage 16 parallel to the oil transmission chamber 11 in the torque transfer gap 7 'penetrates in parallel is installed side by side, and in the radial direction at the dam 15 on the sealer box 2 side. Located in the outer side of the chamber and having an idler chamber 18 which leads to the torque transfer chamber 7 Temperature-sensitive fan fluid coupling device that is configured by including a flow means 19 to the oil only when the stop plate 10 so as to communicate the oil chamber 11 and the torque transmission chamber (7), characterized in. The temperature sensitive fluidic fan coupling device according to claim 1, wherein said distribution means (19) comprises a circular through hole provided in the center of said partition plate (10). The temperature sensitive fluidic fan coupling device according to claim 1, characterized in that the distribution means (19) consists of a plurality of through-holes arranged on the same circumference at the center of the partition plate (10).

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