WO1993017253A1

WO1993017253A1 - Temperature responsive fluid fan coupling device

Info

Publication number: WO1993017253A1
Application number: PCT/JP1993/000254
Authority: WO
Inventors: Hiroshi Inoue
Original assignee: Usui Kokusai Sangyo Kabushiki Kaisha
Priority date: 1992-02-27
Filing date: 1993-03-01
Publication date: 1993-09-02

Abstract

It is possible to more effectively reduce extraordinary noise of a fan and promote warm-up idling by restricting the occurrence of 'corotation' on the fan side to a short period of time after the start of an engine. Similarly, in relation to a specified small amount of oil sealed in a compartmented receiving chamber, it is also possible to restrict the 'corotation' of the fan remarkably effectively that would be caused when an abrupt transition is made from a low-speed operating state to a high-speed operating one by virtue of inlet and outlet in the receiving chamber, efficient pumping function in a dam and the construction of the receiving chamber, thereby making it possible to accelerate heat radiation effect. The thickness of a driving disc is made as thick over the whole surface on its peripheral side as confronts the dam, and the interior of the driving disc is formed into a receiving chamber having a radial wall protruding radially from the inner circumferential surface thereof. Furthermore, a small-diameter hole is formed between the radial walls at a position located slightly inwardly of the circumferential side surface of the back wall portion of the driving disc confronting an oil reservoir, and a through hole in the vicinity of the center of the front side wall of the driving disc.

Description

Description Temperature-sensitive fluid-type fan, coupling technology

The present invention generally relates to a temperature-responsive fluid fan-cutting device for controlling the rotation of a fan for cooling an engine in an automobile and constantly supplying a cooling air flow according to a running state to the engine. The present invention relates to an improvement of Japanese Patent Laid-Open Publication No. Hei 1-1355929 already proposed by a person. Background technology

Conventionally, as a fan coupling device according to the above proposal, a drive disk fixed to a rotating shaft body is provided with an idle oil reservoir in which the interior is hollow, and the idle oil reservoir is provided. A small-diameter hole that communicates with the torque transmission chamber with a hole diameter that is less than the amount of oil discharged from the dam on the inner peripheral wall where the oil on the casing side is collected on the outer peripheral wall of the chamber. The presence of the small-diameter hole prevents the fan from "revolving" after the engine is started for a short time immediately after that, thereby preventing a sudden increase in rotation and causing an abnormal fan. It achieved its purpose by reducing noise and promoting warm-up operation.

Although the above-mentioned prior art naturally attains the object to some extent, however, it still tends to be insufficient, and in particular, the operation state at the time of repeated low rotation is high. There was a tendency that the "rounding" phenomenon during the rapid transition to rotation could not be kept in a short time immediately after that.

The present invention has been made in view of the above-mentioned problems, and an object of the present invention is to provide a fan-side “circle around” when stopping in a state where a large amount of oil is present in a torque transmission chamber according to the conventional technique. It is of course to reduce the fan noise and promote the warm-up operation in cold weather more effectively to satisfy the original purpose, as short as possible after the subsequent engine start. In relation to the ability to reduce the amount of oil inside the enclosure to a specified small amount, the phenomenon of "fan rotation" of the fan is extremely reduced even during the sudden transition from the low-speed operation state to the high-speed operation. A temperature-sensitive fluid-type fan / coupling device that can effectively suppress the oil temperature and promote heat radiation by improving the oil temperature to the outside through the heat transfer effect at the radial wall. To provide.

Disclosure of the invention

In order to achieve the above object, the present invention comprises a case and a cover, which are supported via a bearing on a rotating shaft having a driving disk fixed to the tip and a cooling fan is attached to an outer peripheral portion. A sealer box, a partition plate that divides the interior of the sealer box into an oil sump chamber and a torque transmission chamber that houses the drive disk, and has an oil supply adjustment hole, and a collection of oil during rotation. A dam and a discharge passageway from the torque transmission chamber side to the oil sump chamber side that follows the dam The one on the oil sump chamber side When the temperature of the outside ambient exceeds the set value at the other end in conjunction with the deformation caused by the temperature change of the temperature sensing element provided on the front surface of the cover with the fixed end, the supply adjustment hole of the partition plate is opened and set. When the value is less than or equal to the value, it consists of a valve member that operates to close, and increases or decreases the effective oil contact area in the torque transmission gap provided on the opposing wall near the outside between the drive disk and the seal box. In the fan-coupling device configured to control the transmission of rotational torque from the drive-side rotating shaft body side to the driven-side sealer housing side, the width of the drive disk is set to be The drive disk has a storage chamber structure having a radial wall protruding radially from an inner peripheral surface of the drive disk, and an oil sump chamber. From the peripheral side of the rear wall of the drive disk A temperature-sensitive fluid fan cut-pipe formed by inserting a small-diameter hole between the radial walls and a through-hole near the center of the front side wall of the drive disk. A plurality of storage chambers that define the inside of the drive disk by extending the radial wall in the radial direction near the hole periphery of the through hole provided near the central portion. The small-diameter hole is penetrated near the base of the radial wall in the rotation direction, and the width of the drive disk is at least 10 OmZm or more. This is what we configured.

Since the present invention is configured as described above, the width of the drive disk is set to be thick, and the entire width of the peripheral surface is large. Structure, a perforated structure provided near the center of the front side wall, a storage room structure having radial walls protruding radially from the inner peripheral surface inside, and a rear surface of the drive disk Even if a large amount of oil is present in the torque transmission chamber due to the position of the small-diameter hole formed slightly inward from the peripheral surface at the wall, the oil on the torque transmission chamber side is centered during the stop. Immediately flowing into the inside of the storage chamber defined by the through hole near the part, the amount of oil remaining on the torque transmission chamber side is reduced. Then, when the engine is started in such a state, a small amount of oil stored in the storage chamber is gradually supplied to the torque transmission chamber through the small-diameter hole. Of course, it is possible to keep it very shortly after the start-up, as well as the dam effect over the entire width of the drive disk due to the thick structure of the drive disk, the storage chamber and the small-diameter hole formed inside the drive disk. The medium temperature (around 80 ° C) caused by the use of high-viscosity fluids or the lack of dam function (lack of relative rotation speed) caused by the use of low-torque fan-capping equipment. The tendency of the "revolving around" phenomenon of the prior art fan, which occurs when the operating speed near the low speed (1000 rpm) suddenly shifts from the operating state to the high speed, is changed to the operating state at the low speed. Some oil from the small hole into the storage chamber Due to the inflow, the operating state can be maintained with a minimum amount of oil and can be extremely effectively suppressed, and at the subsequent transition to a high rotation speed, the oil in the storage chamber is transferred to the torque transmission chamber. Let through the small hole to the side Therefore, fan rotation can be reliably obtained.If the inside of the drive disk is formed of a plurality of storage chambers defined by radial walls extending to the vicinity of the through hole, the engine stops. During this time, the oil that has flowed through the through-hole near the central part accumulates in some of the compartments and is limited to some compartments when the engine is subsequently started in such a state. Only a small amount of oil that has been stored is gradually supplied to the torque transmission chamber through the small-diameter hole. The oil in the transmission chamber is pumped by the dam to the discharge passage, but partly flows back through small holes into many storage chambers where there is no oil, and the amount of oil in the torque transmission chamber can be further reduced. ο

In addition, the heat transfer effect at the radial wall makes it possible to transfer the heat on the front surface of the drive disk accompanying the rise in oil temperature to the rotating shaft via the radial wall, thereby promoting the heat radiation effect.

BRIEF DESCRIPTION OF THE FIGURES

FIG. 1 is a longitudinal sectional view of a temperature-sensitive fluid fan-coupling apparatus showing an embodiment of the present invention.

FIG. 2 is a cross-sectional view showing a state where the drive disk corresponding to the line 図 in FIG. 11 is stopped.

FIG. 3 is a vertical cross-sectional view showing the entire fan-and-cutting device in a stop state corresponding to FIG. 2 11 1—HI line.

FIG. 4 is a longitudinal sectional view showing a state of the drive disk alone shown in FIG. 1 at the time of starting rotation. Fig. 5 is a vertical cross-sectional view showing the entire fan / coupling device at the time of start-up rotation corresponding to the line V-V in Fig. 4.

FIG. 6 is a state diagram at the time of constant rotation in the operation state of FIG. 1, and FIG. 7 is a longitudinal sectional view showing a state at the time of constant rotation of the drive disk alone in the case of FIG.

FIG. 8 is a partially cutaway sectional view of the storage room, the small diameter hole, and the vicinity of the dam according to the main part of the present invention corresponding to the line II-VI in FIG. 7.

FIG. 9 is a down view at the time of rapid high rotation in the operating state of another embodiment.

FIG. 10 is a vertical cross-sectional view showing a state at the time of rapid high rotation of the drive disk alone corresponding to the line II-III in FIG.

FIG. 11 is a partially cutaway sectional view of the storage room, the small-diameter hole, and the vicinity of the dam according to the main part of the present invention taken along the line of FIG. 10 XI-XI.

FIG. 12 is a diagram corresponding to FIG. 2, showing still another embodiment of the present invention.

Fig. 13 is a comparison noise curve diagram of the present invention and the prior art. _C Best mode for carrying out the invention.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

In FIGS. 1 to 12, (1) denotes a rotating shaft body, and a radial radiating wall extending in a radial direction extending to a periphery of a through hole (1) provided at a center of a front side wall at a tip thereof. The drive disk (Ώ is fixed, and the rear end is made thick and thin (14.5 mXm) with a plurality of storage rooms (14) partitioned inside by (15). This has a flange wall () for attaching to the mating base, and is configured as a drive side. A cooling fan (not shown) is attached to the outer periphery of the shaft via a bearing. The case (2) and the cover (3) support the sealed casing as the driven side. (5) is a partition plate which divides the inside of the casing into a sump chamber (6) and a torque transmission chamber (4) which houses the drive disk (7). The partition plate is provided with an oil supply adjusting hole (5 ') from the oil sump chamber (6) to the torque transmission chamber (4). The drive disk (7) is located in the torque transmission chamber (4) and has a small gap for torque transmission with the opposing wall of the casing. (8) is a valve member for opening and closing the supply adjusting hole (5 '). One end of the valve member is attached to the wall surface of the partition plate (5) on the oil sump chamber (6) side, and the other end is connected to the supply adjusting hole. And a temperature-sensing body (10) composed of a plate-like bimetal whose both ends are supported by a support bracket (11) fixed to the front surface of the cover (3). It is provided inside via a connecting rod (9) so as to be linked to deformation due to changes in the surrounding temperature. Reference numeral (12) denotes a dam, which is provided on a part of the inner peripheral surface of the sealer box facing the outer peripheral surface of the drive disk (7) for collecting oil during rotation operation. The oil reservoir is provided so as to be opposed to the entire surface of the peripheral side having a thick width, and is provided near the torque transmission chamber (4) provided in front of the dam in the rotation direction. (6) A pumping function is provided by the discharge flow passage (U) to the side.

(14 ') is a drive disk (7) facing the oil sump chamber (6). ) At the front, rear, or center near the base of the radial wall (15), which is defined in the direction of rotation on the rear wall, and located slightly inward from the peripheral side surface. A small-diameter hole penetrated in (4).

Next, the operation of the fan coupling device of the present invention will be described.

First, when the engine is stopped with the torque transmission chamber (4) lying down or a large amount of oil in the torque transmission chamber (4) or with the supply adjustment hole (5 ') open, the oil in the torque transmission chamber (4) is stopped. Flows through the through hole (14 ') into only the lower one of the storage chambers (14) defined by the radiating walls (15) (the lower two in FIGS. 2 and 3). Flows into only one of the two storage chambers (14), (14) and does not flow into the horizontal and upper storage chambers), resulting in a reduction in oil remaining in the torque transmission chamber U).

When the engine is started in this prone state, as shown in Figs. 4 and 5, oil is present only in the storage chambers (14) and (14) located below when the engine is stopped, and the other storage chambers (14 ), ... rotate in the empty state without oil. On the other hand, the oil flows out of the small-diameter holes (U ') and (14') into the torque transmission chamber (4) due to the centrifugal force generated by the rotation of the drive disk (7). At this time, the oil flows to the torque transmission chamber (4). The spill of oil from the two storage chambers (1 4) into which the oil has flowed, and only from the two small holes (14 ') and (14') in (14)-from the other storage chambers (1, ...) O o

The oil pressurized by the dam (12) flows to the discharge passage (U). Many storage rooms that are pumped but partially free of oil

(14), ... flows through the small-diameter holes (1 4 '), ... to further reduce the oil in the Toruda transmission chamber (4).

In other words, in the case of a single hollow storage room that is not partitioned by the radial wall (15), the oil in the storage room is entirely inside the storage room due to the centrifugal force acting on the drive disk (7) when the engine is started. Since it is pressed so as to stick to the peripheral surface, it flows out into all the small diameter holes in the torque transmission chamber, but in the present invention, it flows out through a limited number of small diameter holes, and part of it flows back into the storage chamber. This means that the amount of oil flowing into the torque transmission chamber is extremely small.

Therefore, the phenomenon of "rounding" immediately after the engine is started is controlled in a very short time because oil in the torque transmission chamber (4) is bombed by the dam (12).

Next, the operation at a constant rotation when the supply adjusting hole (5 ') is opened is as shown in Figs. 6 to 8, and the oil accumulated in the storage chamber (14) is removed from the drive disk (7). The centrifugal force causes the oil to flow out of the small-diameter hole (1 4 ') to the torque transmission chamber (4), and the oil in the oil sump chamber (6) to flow through the supply adjustment hole (5'). The rotational torque of the drive disk (7) supplied to (4) is transmitted to the sealed casing on the driven side via oil. On the other hand, the oil in the torque transmission chamber (4) is pumped by the dam (12) and discharged to the oil sump (6) through the discharge flow passage (13).

In addition, during rapid acceleration during normal driving, the drive disk (7) rotates rapidly at high speed and oil in the torque transmission chamber (4) is drained. Some are added by the dam (12) and partly discharged to the oil sump (6) through the discharge flow passage (13) by pumping of the dam (12). Some are shown in Figs. 9 to 11 The oil in the torque transmission chamber (4) is reduced as a result of temporary inflow into the storage chamber (14) from the small-diameter hole (14 ') at the same time, preventing the "rounding" phenomenon during rapid acceleration. Wear. Fig. 13 shows the noise curve when this was suddenly accelerated from 100 rpm to 500 rpm in an atmosphere of 80 ° C in 10 seconds, as shown in Fig. 13. In the present invention, (mouth) represents the prior art.

The drive disk (7) preferably has a width of at least 10 OmZm. If the width is less than 10 mZm, a general-purpose fan-coupling device operates in the low-rotation state. Cannot be effectively prevented during the rapid transition from high speed to high speed. Further, the present invention is not limited to the embodiment in which one through hole (14 mm is provided in the center of the front wall portion), and a plurality of through holes are concentrically arranged as shown in FIGS. Even if the radial wall (15) is formed to have a relatively short width as shown in FIG. 12, the performance of preventing the "turning around" phenomenon of starting is slightly inferior to that of the above-described embodiment. In the case of sudden acceleration during normal driving,

The "rounding" phenomenon can be prevented in almost the same way.

Industrial applicability

As described above, the temperature-sensitive fluid-type fan coupling device according to the present invention is particularly suitable for the drive disk (width of the drive disk). A dam (12) structure with a thicker wall facing the entire surface on the periphery, a through hole (1) provided near the center of the front side wall of the drive disk (7), and a radial wall Storage room with (15) (1

4) (preferably a radial wall (1

The small-diameter hole (14 ') structure, which is located at the outer part of each of the plurality of storage chambers (14)) defined in 5), allows the engine to be stopped in a high-temperature operation state. During this stop, the oil from the torque transmission chamber (4) flows into the interior of the storage chamber (14) through the through hole (14 ').

By reducing the "circle around" in a short period of time, abnormal fan noise can be reduced and warm-up operation in cold weather can be further promoted. In addition, small holes (14 ')), A part of the oil pressurized by the dam (12) flows into the storage chamber (14) via the), and the operation state can be maintained with the minimum oil amount, and therefore, the rotation speed is low. In the event of a sudden transition from the operating state to a high speed, the phenomenon of "fan rolling" of the fan can be suppressed very effectively, and the heat transfer effect on the radial wall (15) allows the oil temperature to be reduced. This is a very useful temperature-sensitive fluid-type fan-cooling device that transfers heat from the front of the drive disk due to the rise of the pressure to the rotating shaft (υ) through the radiating wall (15) to promote the heat dissipation effect. It is a spring device.

Claims

The scope of the claims

1. A sealer box consisting of a case and a cover that is supported via a bearing on a rotating shaft body with a drive disk fixed to the tip and that has a cooling fan attached to the outer periphery. A partition plate that partitions the interior into an oil sump chamber and a torque transmission chamber that houses the drive disk and has an oil supply adjustment hole, and faces an outer peripheral wall surface of the drive disk where oil is collected during rotation. A dam provided on a part of the inner peripheral wall surface on the casing side, and a discharge flow passage connected to the dam from the torque transmission chamber to the oil sump chamber; one end of which is fixed to the oil sump chamber side; When the temperature around the outside exceeds the set value at the other end in conjunction with the deformation caused by the temperature change of the temperature sensing element installed on the front of the cover, the supply adjustment hole of the partition plate is opened and closed when the temperature is below the set value. And a valve member that operates as follows. By increasing or decreasing the effective oil contact area in the torque transmission gap provided on the opposing wall near the side, the transmission of rotational torque from the drive-side rotating shaft side to the driven-side seal box side is controlled. In the fan coupling device according to the present invention, the thickness of the drive disk is set to be opposite to the dam over the entire surface on the peripheral side thereof, and the inside of the drive disk is formed in the same manner. The storage chamber structure has a radial wall protruding radially from the inner peripheral surface, and is located slightly inward from the peripheral side surface of the drive disk rear wall portion facing the oil reservoir chamber. A small diameter hole and a through hole near the center of the front side wall of the drive disk. Sensitive fluid fan cutting device.

2. There are no multiple storage chamber structures that define the inside of the drive disk by extending the radial wall in the radial direction near the perimeter of the through hole provided near the center of the front side wall. 2. The temperature-responsive fluid-type fan coupling device according to claim 1, wherein the fan coupling device is configured as follows.

3. The temperature-responsive fluid-type fan / coupling device according to claim 1, wherein the small-diameter hole extends through a portion near a root of the radial wall in a rotation direction.

4. The temperature-sensitive hydraulic fan according to claim 1, wherein the drive disk has a width of at least 10 OmZm or more. Force-swiping device.