JPS62194038A - Temperature sensing, fluid type fan coupling device - Google Patents

Abstract

PURPOSE:To permit fan noise and abrupt variation in a load on a fan driven system to be reduced as well as to prevent fuel consumption and horse power to be wasted, by the fan drive property due to the action of an operating valve to be actuated by centrifugal force. CONSTITUTION:An operating valve member 16 is provided in addition to an associating valve member 8 operable by sensed temperature, the operating valve member 16 adjusting the opening of a flowing-out amount regulating hole 5' in accordance with the rotational speed of a driven side, then the amount of oil supplied to a torque transmitting chamber 4 exceeds the amount of oil recovered into an oil sump 6 in the outside temperature increasing process by opening the flowing-out regulating hole 5' with a result that the operating valve member 16 is actuated by centrifugal force to reduce the opening of the flowing-out amount regulating hole 5' for controlling an abrupt increase in a fan rotation. Further, when the temperature is higher than the aforementioned temperature, the amount of oil supplied is less than the amount of oil recovered to reduce the rotation of the fan and when the fan is going to reduce its rotation, the amount recovered is less than the amount supplied to increase the rotation of the fan.

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention generally controls the rotation of an engine cooling fan in an automatic AAA to continuously supply the engine with a cooling air flow rate according to the running condition of the vehicle width. This relates to the revision of a temperature-sensitive fluid type fan coupling device. [Prior art] Conventionally, this type of fluid type fan coupling device has a A circle S of four sealed boxes as a driven side consisting of a cover (23) to which a cooling fan member is attached and a case (22)) Oil leakage) L1
The opening plate (25) having four orifice holes (25') is divided into an oil reservoir chamber (26) and a torque transmission chamber (24), and furthermore, on the torque transmission chamber (24) side, the sealing plate (25) is provided with the sealing plate (25). Bearing the box (B'
) is installed inside the drive disk (27) provided at the tip of the rotating shaft body (21) that supports the valve, and also has a seal that intersects with the outer peripheral side wall of the drive disk (27) where oil collects during rotation. A dam (32) is formed on a part of the inner peripheral wall surface on the container side, and a oil reservoir chamber (26) is provided near the dam on the torque transmission chamber (24) side.
) side, and furthermore, on the oil sump chamber (26) side, when the external ambient temperature exceeds the set 1 ton, the outflow adjustment hole (25') of the dividing plate (25) is formed. )'& Temperature-sensing interlocking valve member that opens and closes below the set value (
28) is a temperature sensing element (
30), which is linked to the strain deformation caused by temperature changes.
the drive disk (27);
The effective contact area for the amount of oil in the torque transmission gap between the opposing surfaces of the four sealed boxes is increased by 7JR, and
) was configured to control the torque transmission to the driven side sealed four box.

[Problem that the invention seeks to solve]

However, these traditional hydraulic fan couplings? In case of i m, the temperature of the air around the outside after passing through the ratcheter is a constant temperature (varies depending on the car model, but about 5
When the temperature reaches 0°C to 80°C, the bimetal serving as the temperature sensor (30) undergoes radial strain deformation, and at the same time the oil reservoir chamber (
26) The interlocking valve member (28) provided in the inner part is integrally interlocked with the rotation of the interlocking rod (29), and the outflow adjustment hole (25') of the dividing plate (25) is opened to adjust the oil amount torque. Transmission room (24)
It leaks to the side and increases the rotation of the fan.
In other words, since the opening degrees of the outflow adjustment holes (25) are controlled only by the displacement due to strain deformation of the temperature sensing element (30), the characteristics of the external ambient temperature and the valve opening degree are as shown in Fig. 4, regardless of the rotation of the fan. As shown in the 01 curve, it changes approximately linearly.

The fan drive characteristics at that time are as shown in the 92 curve in Figure 5, a section in which the fan rotation increases as the temperature rises (-b), and a section in which the fan rotation increases without temperature change (b-d). .

A section where the fan does not turn off even if the temperature drops (d-f\ A section where the fan rotation decreases even if there is no temperature change (f-h),
The section where the fan rotation decreases as the temperature decreases (h-a
) exists as -f:1. The reason for this will be explained with reference to FIG. Figure 6 explains the temperature-sensitive operation of the fan coupling device, which shows the relationship between the fan rotation speed and the amount of oil spilled and recovered.
These are the conventional oil outflow capacity curves for each constant temperature (constant opening), and the XY straight line is the oil recovery! It is a characteristic curve showing k. Therefore, when the rotation and temperature at the valley point on the section a%b in FIG. 5 are plotted on FIG. 6, a curve AB is obtained. In the characteristic diagram, (a) Point A (or point 6) is in the off-rotation state with the motion valve member (2) fully closed, and the pressure of the centrifugal force applied to the oil existing in the oil sump chamber (26y) and the dam (32 ) The pressure generated by the shearing force applied to the oil in the vicinity of
4) There is no flow in any direction.

(b) Between AB (the father is section a-b) is a section where the rotation increases as the temperature rises, and the amount of outflow from the outflow adjustment hole (25') and the amount recovered from the circulation flow path (33) are equal. It is an area. The rotation during this period causes torque transmission while the oil moves from the outflow adjustment hole (25") to the circulation flow path (33). This is a phenomenon in which the torque changes as the effective contact area between the disk (27) and the oil changes.Experimentally, the fan rotation per flow rate is given by the curve ABg', and therefore, a certain flow curve! (dotted line) and curve A
If an intersection point with B exists, for example, a 0 point, a 0 point in FIG. 5 occurs on the fan drive characteristic. A series of such points is the breath-c-b curve on the fan drive characteristics.

Next, the b-d section is a section where the rotation increases even if the temperature does not change. A rotation of jL becomes an E' rotation. In this region, that is, on the E1 side of
4) Accumulated in f', the rotation increases over time regardless of the temperature, and the rotation increases at Y rotation 1 when the total transmission torque of the fan clutch is reduced.

Although point E was separated from point B for the sake of explanation, if point B intersects slightly on the X side, the outflow curve will intersect with curve BE' on the E' side of the straight line, and the same It shows a temporal change, and is the point d on the fan drive characteristics in FIG. When the maximum rotation is reached, the amount recovered is the amount shown at point Y, and therefore the flow rate of oil in the fan drive is determined by the amount shown at point Y, and almost all of the oil is present in the torque transmission chamber (24), and the dam The oil returned to the oil sump chamber (26) by (32) is also
flows into the torque transmission chamber. Therefore, only the flow rate shown at point Y passes through the oil sump chamber (26) at each time, and this phenomenon remains the same even if the temperature rises.

) Next, the Il-f section is a section where the switch does not turn off even if the temperature drops. In other words, as the temperature decreases, the outflow capacity decreases, but the outflow capacity curve is
If there is an intersection on the side, the outflow capacity exceeds the recovery amount and it remains on. This state continues until the outflow capacity curve reaches a temperature that passes through point Y, which is between d and f on the fan drive characteristics.

(υ Next, the f-h section is a section where the rotation decreases even if there is no temperature change. This means that when the outflow capacity curve has an intersection point F on the opposite side of 2 to the straight line yz and Y point, the outflow amount increases. It becomes less than the recovery amount, and changes to the intersection point H between the outflow capacity curve and the curve λB as time passes.In other words, as in the temperature raising process, if the intersection point is even slightly on the opposite side of point 2 from point Y, such a phenomenon will occur.
At this time, the intersection point F of the straight line YZ with the extension line is point f on the fan drive characteristics in FIG. The point that overlaps with point H in FIG. 6 is point h in FIG.

(F) Furthermore, the h - a section is the section where the rotation decreases as the temperature decreases, and the following is the outflow capacity curve and the curve AB and the point of intersection. . As explained above, due to the characteristics of conventional devices, the rotation of the fan suddenly increases or decreases even when there is no temperature change, which causes fan noise due to discontinuous changes during use. Further, there are problems in that discontinuous changes in fan horsepower consumption cause sudden changes in load on the fan drive system, and at the same time, excessive cooling air volume is generated, resulting in waste of fuel and horsepower.

In order to extremely effectively solve the above-mentioned conventional problems, the present invention provides a centrifugal force-operated valve member that is separate from the temperature-sensitive interlocking valve member in a fluid type near-coupling device. By installing the fan on the starting plate and configuring the opening of the outflow adjustment hole to decrease as the rotational speed of the driven side increases, the rotation of the fan increases or decreases without the conventional temperature change. It is an object of the present invention to propose a fluid-type fan coupling device that can obtain fan rotation that continuously corresponds to the external ambient temperature without causing any noise.

[Means to solve the problem]

The present invention provides an oil reservoir chamber and a torque transmission chamber in the ffl sealing box masked part as a driven side, which is composed of a cover and a case on which a cooling fan member is attached on the outer circumferential side, by a partition plate having an oil outflow adjustment hole. Further, on the torque transmission chamber side, a driving disk provided at the tip of a rotating shaft body that supports the sealing box through a bearing is installed, and a driving disk that collects oil during rotation is installed inside. A dam is formed on a part of the inner circumferential side of the sealing box side facing the outer circumferential side wall, and a circulation flow passage is formed near the dam that leads from the torque transmission chamber to the oil sump chamber side, and further on the oil sump chamber side. In addition, a temperature-sensitive interlocking valve member is provided on the front surface of the cover, which opens the outflow adjustment hole of the dividing plate when the external ambient temperature exceeds a set value, and closes it when the temperature falls below the set value. A connecting rod is provided internally so as to move in response to strain deformation due to temperature change, and the effective contact area of the oil amount in the torque transmission gap between the opposing surfaces of the driving disk and the sealing case is increased or decreased. In a fluid-type fan coupling device that completely controls the transmission of torque from the body force of the rotating shaft on the side to the sealing box on the driven side, a valve member separate from the temperature-sensitive interlocking valve member is installed on the back side of the dividing plate. A temperature-sensitive fluid type fan coupling device comprising an actuating valve member that is operated by the centrifugal force V'c↓ of the body and is arranged in such a way that the opening degree of the outflow adjustment hole decreases as the rotational speed of the driven side increases. t as the gist, and furthermore, the far IL? A force-operated valve member is constructed by attaching a weight to the free end of the valve member or by tensioning a spring.

〔Example〕

One embodiment of the present invention will be explained based on the drawings. Fig. 1 is a longitudinal cross-sectional view of a temperature-sensitive fluid type fan coupling device of the present invention, and Fig. 2 is a centrifugal force operated valve according to the invention. It is a partially cutaway rear view showing another embodiment of the member, in which (1) is a rotary shaft body with a drive disk (7) fixed to the tip, and a cover (3) and a case (3) are mounted on the shaft body. 2) The sealing case includes a bearing (supported through the shaft) as the driven side to which the cooling fan member is attached on the outer circumferential side consisting of the sealing case (5). (7) is divided into an interior torque transmission chamber (4), and the division plate is provided with an outflow adjustment hole (51) from the oil reservoir chamber (6) to the torque transmission chamber (4). (8th hole is the outflow adjustment hole (5'
) is an interlocking valve member that opens and closes the cover (
3) Temperature sensing element (1o) made of bimetal provided in front of
When the external ambient temperature exceeds a set value in conjunction with the strain deformation caused by the temperature change, the outflow adjustment hole (5゛) is opened;
It operates to close below the set value. Then, the effective contact area for the amount of oil in the torque transmission gap between the facing surfaces of the driving disk (7) and the sealing case is increased or decreased, and the sealing area is changed from the rotating shaft body (1) on the driving side to the sealing case on the driven side.・＼
It controls the torque transmission. (13) is formed near the dam (12) which has a pumping function in front of the rotational direction and is provided on a part of the inner circumference side wall surface on the side of the inner sealing box opposite to the outer circumference side wall portion of the drive disk (7). This is a circulation passageway that leads from the torque transmission chamber (4) side to the oil reservoir chamber (6) side. (16) is a centrifugally actuated valve member made of a flexible plate or the like that is separate from the temperature-sensitive interlocking valve member (8) installed on the back side of the dividing plate (5), The base end portion is riveted to the dividing plate, and the opening degree of the outflow adjustment hole (5') is decreased as the rotational speed of the driven side increases. Depending on the design, (17) may be a spindle attached to the free end side of the operating valve member (16), and (18) may be a conical member attached to the free end side of the operating valve member (16) as shown in FIG. It is a spring that is stretched on the free end side of the. (
11) is a hanging support at one end of the temperature sensing element (10);
) is a boss hole for mounting a fan member, and (15) is a cooling fan provided radially outside the cover (3).

In addition, (pt) in FIG. 4 shows the characteristic curve of temperature and valve opening in the present invention, and (P2) in FIG. 5 shows the Noah/drive characteristic curve in that case. It is.

[For production]

The present invention thus provides a temperature-sensitive compliance-Jf member (8).
A valve member (1) operated by centrifugal force that controls the opening degree of the outflow adjustment hole (5") in accordance with the rotational speed of the bankrupt wJ side, which is separate from the
6), in the process of temperature rise in the external surroundings, the outflow adjustment hole (5') of the slow valve member (8) is opened and the torque transmission chamber is (4)
The amount of oil leaked to the Gakgon flow path (13 Chiwe et al.'s oil reservoir
6) When the rotation of the fan is about to rapidly increase beyond the amount recovered, the valve member (16) operated by the centrifugal force causes an outflow of 14 m! The opening at the hole (5°) [t] is displaced in the decreasing direction to suppress the amount of oil flowing toward the torque transmission chamber (4) side and prevent a sudden increase in fan rotation. , if the fan rotation attempts to increase due to a temperature change in a higher temperature state, the amount of oil spilled will be recovered: fl
If the amount falls below t, the fan rotation will decrease, and if the fan rotation is about to decrease, the collected amount will fall below the outflow amount and the fan rotation will increase, as shown in Figure 4. The fan drive characteristic shown in (P2) of FIG. 5 is exhibited in synchronization with the characteristic of (Pl).

The reason for this will be explained with reference to FIG. That is, the curve shown by the one-dot chain line in FIG. 6 is the oil outflow capacity curve according to the present invention at each constant temperature, and the outflow capacity curve does not have an intersection with the XY curve but has an intersection with the curve AB. In this case, the mechanism is similar to the conventional type, and the rotation corresponds to each temperature. This section is the fifth
If the outflow capacity curve intersects the recovery capacity curve XY and the point B slightly on the X side of the curve a-b' in the figure, then the outflow capacity curve and ABE'
The rotation is indicated by the intersection point M with the curve, and the outflow amount exceeds the recovery amount, and the (outflow amount - recovery amount) at each time is accumulated in the torque transmission chamber (4).
At the two intersection points Blt, the rotation increases at an accelerated rate even if there is no change in temperature. In FIG. 6, there are outflow capacity curves that touch at point B, so there is no discontinuity in FIG.

As the temperature further increases, the respective outflow capacity curves and BY
Due to the rotation of the intersection of the line segments, this section is the curve b1 in Figure 5.
~e I'm here. In this state, if the fan rotation tries to increase, the amount of oil spilled becomes less than the amount recovered, and the fan rotation decreases, and if the fan rotation tries to decrease, the amount recovered becomes less than the amount spilled, the rotation increases, and the intersection maintains rotation and stability.

Next, when the temperature exceeds the point where the intersection point is at point Y, the full torque of the fan drive is transmitted and the rotation becomes constant.
This section is directly 01-rl in FIG.

As stated above, the present invention eliminates discontinuous changes;
Therefore, due to the cooperative function of the temperature-sensing interlocking valve member (8) and the centrifugal force-operating valve member (16), the rotation of the nine fans can be maintained in response to the external ambient temperature at all times.

In addition, the temperature sensing element (10) that interlocks the interlocking valve member (8)
) changes to a bimetallic shape consisting of a spiral shape,
The gist of the present invention can be applied even if the piston keyaki is suppressed and moved to open and close the outflow adjustment hole (51) by bending deformation in the front-rear direction due to the shape of a rectangular plate-like bimetal. Of course, there is no difference between the two.

〔Effect of the invention〕

As explained above, the temperature-sensitive sealed fluid type fan coupling device according to the present invention has a fan shown in (P2) due to the characteristics of the front gd (pl) exerted by the centrifugal force actuated valve member (16) provided therein.・Due to the drive characteristics, it is possible to reduce fan noise due to unfortunate changes during use and sudden load fluctuations in the fan drive system due to discontinuous changes in horsepower consumption, and at the same time eliminate the generation of excessive cooling air volume. The waste of fuel consumption and horsepower can be reduced, and the structure of the operating valve member (1G) provided separately from the interlocking valve member (8) facilitates its design and manufacture. This is an extremely useful temperature-sensitive fluid type fan coupling device that can reliably perform temperature functions over a long period of time.

[Brief explanation of drawings]

FIG. 1 is a vertical cross-sectional view of an i-degree sensitive type fluid type fan coupling device showing one embodiment of the present invention, and FIG. 3 is a partially cutaway rear view of a temperature-sensitive fluid type fan coupling device showing a conventional embodiment, and FIG. 4 is a temperature diagram of the present invention and a conventional type. FIG. 5 is a characteristic curve diagram showing the relationship between valve opening and closing, FIG. 5 is a characteristic curve diagram of the fan drive at that time, and FIG. 6 is a diagram explaining the temperature sensing operation. (5)...Split plate, (5')...Outflow adjustment hole, (8
)... Interlocking valve member, (16)... Operating valve member, (1
7)... Mu cone, (18)... spring. Special #! F Applicant: Usui International Rogyo Co., Ltd. Figure 1
Figure 3 Figure 2

Claims (3)

[Claims] (1) The inside of the sealed box, which serves as the driven side and consists of a cover and a case on which the cooling fan member is attached on the outer circumferential side, is divided into an oil reservoir chamber and a torque transmission chamber by a partition plate having oil outflow adjustment holes. Further, on the torque transmission chamber side, a driving disk provided at the tip of a rotating shaft supporting the sealing case via a bearing is installed, and an outer peripheral side wall of the driving disk where oil collects during rotation. A dam is formed on a part of the inner circumferential wall surface of the sealing case side facing the part, and a circulation flow passage is formed near the dam and leads from the torque transmission chamber to the oil sump chamber side, and further, on the oil sump chamber side, A temperature-sensitive interlocking valve member that opens the outflow adjustment hole of the dividing plate when the external ambient temperature exceeds a set value and closes when the temperature falls below the set value is adapted to changes in temperature of a temperature sensing element provided on the front surface of the cover. It is provided internally via a connecting rod so as to respond to the accompanying strain deformation, and increases or decreases the effective contact area of the oil amount in the torque transmission gap between the opposing surfaces of the drive disk and the sealing case, thereby controlling the rotation of the drive side. In a fluid type fan coupling device that controls torque transmission from a shaft body to a driven-side sealing case, a centrifugal force separate from the temperature-sensitive interlocking valve member is applied to the back side of the dividing plate. 1. A temperature-sensitive fluid type fan coupling device, characterized in that an actuating valve member according to the invention is arranged in such a manner that the opening degree of the outflow adjustment hole decreases as the rotational speed of the driven side increases. (2) The temperature-sensitive fluid type fan according to claim 1, wherein the valve member operated by centrifugal force is constructed by attaching a weight body to the free end side of the valve member.・Coupling device. (3) The temperature-sensitive fluid type fan according to claim 1, characterized in that the centrifugal force operated valve member is constructed by tensioning a spring on the free end side of the operating valve member. coupling device.