Small light-weight temperature-sensing and pressure-sensing valve

Abstract

The utility model belongs to the technical field of aviation aircraft lubricating oil system heat exchange, and discloses a small-sized light-weight temperature and pressure sensing valve which comprises a valve seat, a pressure sensing spring, a lining, a split washer, a reset spring and a temperature sensing element. Both the valve seat and the bushing are interfaces with holes at single ends, and the bushing is arranged in the holes of the valve seat; a convex edge is arranged at the hole opening end of the lining, the pressure sensing spring is compressed between the hole bottom of the valve seat and the convex edge of the lining, and a limiting structure matched with the convex edge of the lining is arranged at a hole opening of the valve seat, so that the lining cannot move out of the valve seat. One end of the temperature sensing element is inserted into a hole of the bushing and is connected with a split washer, and a compressed reset spring is arranged between the split washer and the limiting structure; the other end of the temperature sensing element is connected with the valve. The length of the valve rod is shortened, the size of the overall structure is reduced, the overall weight is reduced, and the reliability of the high-temperature-sensing and pressure-sensing valve is improved.

Description

Technical Field

[0001] This utility model belongs to the field of heat exchange technology for aircraft lubricating oil systems, and relates to a temperature and pressure valve, particularly a small and lightweight temperature and pressure sensing valve structure. Background Technology

[0002] Temperature and pressure sensing valves are an important accessory in lubricating oil systems of aircraft and other aircraft. They are usually integrated on the end caps of heat exchangers. They mainly control whether lubricating oil flows into the heat exchange core for heat exchange under specified temperature and pressure conditions by sensing the temperature of the lubricating oil inlet or outlet and the pressure difference between the inlet and outlet.

[0003] Given the urgent need for lightweight and efficient heat exchanger technology, customers are placing increasingly stringent requirements on the weight, size, heat exchange performance, and reliability of heat exchangers. Consequently, higher demands are being placed on temperature and pressure sensing valves. The size, weight, and reliability of traditional temperature and pressure sensing valves can no longer meet the needs of market development. Especially when there is no room for weight reduction in the heat exchange core, reducing the size and weight of temperature and pressure sensing valves and improving their reliability has become even more urgent. Utility Model Content

[0004] To address the aforementioned problems, this utility model provides a small, lightweight temperature and pressure sensing valve. This valve controls the heat exchange process by sensing the temperature and pressure difference of the working medium, while also possessing advantages such as small size, light weight, and high reliability.

[0005] The technical solution of this utility model is as follows:

[0006] A small, lightweight temperature and pressure sensing valve includes a valve seat, a pressure sensing spring, a bushing, an opening retaining ring, a return spring, and a temperature sensing element. Both the valve seat and the bushing are single-ended openings, with the bushing positioned within the opening of the valve seat. One end of the bushing opening has a protruding edge, and the pressure sensing spring is compressed between the bottom of the valve seat opening and the protruding edge of the bushing. The valve seat opening has a limiting structure that matches the protruding edge of the bushing, preventing the bushing from moving outside the valve seat. One end of the temperature sensing element is inserted into the bushing opening and connected to the opening retaining ring. A compressed return spring is positioned between the opening retaining ring and the limiting structure. The other end of the temperature sensing element is connected to the valve.

[0007] Furthermore, the valve has a tapered circular surface on the side opposite to the valve seat, and the tapered circular surface of the valve mates with the sealing oil surface.

[0008] Furthermore, the temperature sensing element includes a push rod, a temperature sensing bulb, and a valve rod. The bushing has a groove in the center of the hole bottom. The push rod is positioned in the groove of the bushing and is limited. The valve rod is connected to the valve. The temperature sensing bulb is located between the push rod and the valve rod. The temperature sensing bulb is a structure that expands back after being heated.

[0009] Furthermore, the temperature-sensing bag consists of temperature-sensing particles wrapped in an elastic material.

[0010] Furthermore, the temperature-sensing bulb is made of elastic, heat-resistant rubber wrapped around paraffin.

[0011] Furthermore, the limiting structure includes an elastic retaining ring, and an annular groove is provided on the inner side wall of the valve seat opening, with the elastic retaining ring disposed in the annular groove.

[0012] Furthermore, an adjusting shim is provided between the bottom of the valve seat hole and the pressure-sensing spring.

[0013] The beneficial effects of this utility model are as follows:

[0014] This utility model's temperature and pressure sensing valve, through its structural design, encloses the pressure regulating spring, return spring, and bushing inside the valve seat housing, shortening the valve rod length and reducing the overall structural size. The bushing features end flanges and bottom grooves, which simultaneously limit the movement of the pressure sensing spring and temperature sensing element. This reduces the design of spring seat parts and increases the radial limit of the temperature sensing element, thereby reducing the overall weight and improving the reliability of the temperature and pressure sensing valve. Attached Figure Description

[0015] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the small, lightweight temperature and pressure sensing valve of this utility model;

[0017] Figure 2 This is a schematic diagram of the bushing of this utility model;

[0018] Among them, 1—gate seat, 2—adjusting shim, 3—pressure sensing spring, 4—bulb, 5—opening retaining ring, 6—reset spring, 7—temperature sensing element, 8—shim, 9—elastic retaining ring, 10—gate, 11—cotter pin; 41—groove, 42—body, 43—protruding edge. Detailed Implementation

[0019] This section describes embodiments of the present invention, used to explain and illustrate the technical solutions of the present invention. Unless otherwise specified, the embodiments and features described herein can be combined with each other.

[0020] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating directions or positional relationships, are based on the orientation or positional relationships in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description. They do not indicate or imply that the device or device referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as limiting this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include more than one of those features. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0021] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integrated connection; they can refer to a mechanical connection or a point connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0022] Example 1:

[0023] A small, lightweight temperature and pressure sensing valve includes a valve seat 1, a pressure-sensing spring 3, a bushing 4, an opening retaining ring 5, a return spring 6, and a temperature sensing element 7. Both the valve seat 1 and the bushing 4 are single-ended openings, with the bushing 4 positioned inside the opening of the valve seat 1. One end of the opening of the bushing 4 has a protruding edge, and the pressure-sensing spring 3 is compressed between the bottom of the opening in the valve seat 1 and the protruding edge of the bushing 4. The opening of the valve seat 1 has a limiting structure that matches the protruding edge of the bushing 4, preventing the bushing 4 from moving outside the valve seat 1. One end of the temperature sensing element 7 is inserted into the opening of the bushing 4 and connected to the opening retaining ring 5. A compressed return spring 6 is positioned between the opening retaining ring 5 and the limiting structure. The other end of the temperature sensing element 7 is connected to the valve 10.

[0024] The valve 10 has a tapered circular surface on the side facing the valve seat 1 in the opposite direction, and the tapered circular surface of the valve 10 is in contact with the oil sealing surface.

[0025] The temperature sensing element 7 includes a push rod, a temperature sensing bulb, and a valve rod. The bushing 4 has a groove in the middle of the hole bottom. The push rod is positioned in the groove of the bushing 4 and is limited. The valve rod is connected to the valve 10. The temperature sensing bulb is located between the push rod and the valve rod. The temperature sensing bulb is a structure that expands back after being heated.

[0026] A temperature-sensing bag is made of elastic material that encapsulates temperature-sensing particles.

[0027] The temperature-sensing bulb is made of elastic, heat-resistant rubber wrapped around paraffin.

[0028] The limiting structure includes an elastic retaining ring 9. An annular groove is provided on the inner side wall of the valve seat 1 orifice, and the elastic retaining ring 9 is disposed in the annular groove.

[0029] An adjusting shim 2 is also provided between the bottom of the hole in the valve seat 1 and the pressure-sensing spring 3.

[0030] Example 2:

[0031] The utility model features of this utility model are:

[0032] This utility model provides a small and lightweight temperature and pressure sensing valve device. Through structural design, the pressure regulating spring, return spring, and bushing are enclosed inside the valve seat housing, shortening the valve rod length and reducing the overall structural size. The bushing has end flanges and bottom grooves, which limit the pressure spring and temperature sensing element, reducing the design of spring seat parts and increasing the radial limit of the temperature sensing element, thus reducing the overall weight and improving the reliability of the temperature and pressure sensing valve.

[0033] The valve seat 1 is an integral machined structure with an internal groove. An elastic retaining ring 9 is installed in the groove, which encloses the pressure-sensing spring 3, the return spring 6, and the bushing 4 within the valve seat 1 housing.

[0034] The pressure-sensing spring 3 bears the pressure difference of the valve 10, realizing the opening or closing function of the temperature and pressure sensing valve. The opening pressure difference is adjusted by adding an adjustment shim 2 at the bottom of the valve seat 1 to ensure that the valve operates within the specified pressure difference range.

[0035] The circular body of the bushing 4 is embedded in the inner ring of the pressure-sensing spring 3, and a flange is provided at the end to limit the pressure-sensing spring 3. The pressure difference received by the valve 10 is finally transmitted to the pressure-sensing spring 3 through the flange of the bushing 4 to realize the pressure-sensing function.

[0036] The bushing 4 has a groove at the bottom, and the top rod of the temperature sensing element 7 is inserted into the groove to radially limit the temperature sensing element 7.

[0037] The temperature sensing element 7 has a groove, which, when connected to the open retaining ring 5, serves to limit the position of the reset spring 6.

[0038] The gasket 8 and the elastic retaining ring 9 mainly limit the return spring 6 and prevent the temperature sensing element 7 from extending indefinitely, thus protecting the temperature sensing element 7.

[0039] The return spring 6 is sleeved on the temperature sensing element 7. When the lubricating oil temperature rises to a certain value, the bottom rod of the temperature sensing element 7 extends, pushing the valve 10 to close the bypass channel. At the same time, the return spring 6 is compressed and acts as a buffer. When the lubricating oil temperature drops, the paraffin inside the temperature sensing element 7 contracts, the return spring 6 releases its preload, and pushes the temperature sensing element 7 to reset through the open retaining ring 5, thereby opening the bypass.

[0040] The valve 10 is threaded onto the temperature sensing element and fixed by a cotter pin 11, used to open or close the lubricating oil bypass passage.

[0041] Example 3:

[0042] Figure 1 This is a schematic diagram of a small, lightweight temperature and pressure sensing valve according to an embodiment of the present invention.

[0043] A small, lightweight temperature and pressure sensing valve with an integral structure as follows Figure 1 As shown, a small, lightweight temperature and pressure sensing valve includes: valve seat 1, adjusting shim 2, pressure sensing spring 3, bushing 4, opening retaining ring 5, return spring 6, temperature sensing element 7, shim 8, elastic retaining ring 9, valve 10, and cotter pin 11.

[0044] The valve seat 1 is a machined integral structure. The adjusting shim 2 is placed at the bottom of the valve seat housing. One end of the pressure-sensing spring 3 contacts the adjusting shim 2, and the other end contacts the bushing 4.

[0045] The bushing 4 body is placed in the inner ring of the pressure-sensing spring 3; one end of the temperature-sensing element 7 passes through the return spring 6 and the washer 8, and an open retaining ring 5 is installed on the groove of the outer shell of the temperature-sensing element 7, and then it is inserted into the bottom groove of the bushing 4; the elastic retaining ring 9 passes through the outer shell of the temperature-sensing element 7 and is installed on the groove of the valve seat 1, fixing the pressure-sensing spring 3, the return spring 6, and the temperature-sensing element 7 inside the valve seat 1; the other end of the temperature-sensing element 7 is connected to the valve 10 by a thread and is fixed by a cotter pin 11.

[0046] After the temperature and pressure sensing valve device is installed in the product, when the lubricating oil outlet temperature is low, the end face of valve 10 is not in contact with the valve channel on the heat exchanger end cover, and the bypass flow channels of the lubricating oil inlet and outlet are open. The lubricating oil directly enters the outlet flow channel through the radiator lubricating oil chamber inlet flow channel and flows out from the lubricating oil outlet into the engine. When the lubricating oil outlet temperature reaches the operating temperature of the temperature sensing element 7, the push rod of the temperature sensing element 7 begins to extend, driving valve 10 to move to the right. The opening retaining ring 5 begins to apply a force to the right to the return spring 6. When the return spring 6 is compressed, the bypass flow channel between the oil inlet and outlet begins to close. As the oil outlet temperature continues to rise, the push rod of the temperature sensing element 7 continues to extend, the return spring 6 continues to be compressed, and the valve 10 continues to move to the right until the bypass flow channel between the oil inlet and outlet is completely closed, and the oil flows through the heat exchanger for heat exchange. When the pressure difference between the oil inlet and outlet reaches the specified value, the pressure sensing spring 3 is compressed, the valve 10 moves to the left, and the bypass flow channel between the oil inlet and outlet opens.

[0047] The temperature sensing element 7 specifically comprises a push rod, a temperature sensing bulb, and a valve rod. The push rod is positioned within the groove of the bushing 4. A temperature sensing bulb is positioned axially between the push rod and the valve rod. The temperature sensing bulb is a structure that expands when heated. Specifically, the temperature sensing bulb can be made of an elastic material that encapsulates temperature-sensing particles, such as a rubber sleeve encapsulating paraffin wax.

[0048] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of this utility model, but the protection scope of this utility model is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this utility model, and these modifications or substitutions should be covered within the protection scope of this utility model.

Claims

1. A small, lightweight temperature and pressure-sensitive valve, characterized in that, It includes a valve seat (1), a pressure-sensing spring (3), a bushing (4), an opening retaining ring (5), a return spring (6), and a temperature-sensing element (7); both the valve seat (1) and the bushing (4) are single-ended opening interfaces, and the bushing (4) is located inside the opening of the valve seat (1); one end of the opening of the bushing (4) is provided with a protruding edge, and the pressure-sensing spring (3) is compressed between the bottom of the hole of the valve seat (1) and the protruding edge of the bushing (4). The opening of the valve seat (1) is provided with a limiting structure that matches the protruding edge of the bushing (4), so that the bushing (4) cannot move outside the valve seat (1); one end of the temperature-sensing element (7) is inserted into the hole of the bushing (4) and is connected to the opening retaining ring (5). A compressed return spring (6) is provided between the opening retaining ring (5) and the limiting structure; the other end of the temperature-sensing element (7) is connected to the valve (10).

2. The small, lightweight temperature and pressure sensing valve according to claim 1, characterized in that, The valve (10) has a tapered circular surface on the side opposite to the valve seat (1), and the tapered circular surface of the valve (10) is in contact with the oil sealing surface.

3. The small, lightweight temperature and pressure sensing valve according to claim 1, characterized in that, The temperature sensing element (7) includes a push rod, a temperature sensing bulb and a valve rod. The bushing (4) has a groove in the middle of the hole bottom. The push rod is positioned in the groove of the bushing (4) and is limited. The valve rod is connected to the valve (10). The temperature sensing bulb is located between the push rod and the valve rod. The temperature sensing bulb is a structure that expands back after being heated.

4. A small, lightweight temperature and pressure sensing valve according to claim 3, characterized in that, A temperature-sensing bag is made of elastic material that encapsulates temperature-sensing particles.

5. A small, lightweight temperature and pressure sensing valve according to claim 4, characterized in that, The temperature-sensing bulb is made of elastic, heat-resistant rubber wrapped around paraffin.

6. A small, lightweight temperature and pressure sensing valve according to claim 1, characterized in that, The limiting structure includes an elastic retaining ring (9), and an annular groove is provided on the inner side wall of the valve seat (1) orifice, with the elastic retaining ring (9) located in the annular groove.

7. A small, lightweight temperature and pressure sensing valve according to claim 1, characterized in that, An adjusting shim (2) is also provided between the bottom of the hole of the valve seat (1) and the pressure-sensing spring (3).

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