A diaphragm assembly and sensor

Abstract

This invention discloses a diaphragm assembly and sensor, including an annular diaphragm, an annular plate, a diaphragm assembly, and an actuating component. The annular plate is connected to the radially inner annular region of the annular diaphragm. The diaphragm assembly includes a substrate and a diaphragm stacked and connected as a single unit. The diaphragm assembly is connected to the annular plate and covers the hollow region in the center of the annular plate. A perforation is formed on the substrate to expose the diaphragm, and the actuating component is disposed at the perforation. The actuating component includes lever portions respectively disposed on both sides of the diaphragm. One end of the lever portion is connected to the diaphragm, and the other end of the lever portion is cantilevered relative to the diaphragm. The diaphragm assembly of this invention can perform different actions, including displacement transmission and torque transmission, and can simultaneously monitor pressure and differential pressure. It has high integration, small footprint, and light weight, meeting the needs of miniaturization development.

Description

Technical Field

[0001] This invention relates to the field of sensor assembly technology, and more particularly to a diaphragm assembly and sensor. Background Technology

[0002] The engine lubrication system provides lubricating oil to various friction surfaces inside the engine, such as gearboxes and bearings, to reduce friction and lubricate and cool the components. It also provides the necessary working fluid for feathering the propeller. The proper functioning of the lubrication system is crucial for ensuring safe engine operation and is a vital system affecting flight safety. Pressure sensors and differential pressure sensors are important components of the lubrication system. These sensors convert lubrication pressure signals into switching electrical signals, promptly detecting pressure fluctuations in the engine oil system, lubrication leaks, and engine wear. They then issue alarm signals to alert the pilot that the engine has malfunctioned or has potential for malfunction, requiring immediate return to the airfield for inspection or engine shutdown to prevent further damage.

[0003] Commonly used pressure sensors and differential pressure sensors adopt diaphragm structures. However, traditional diaphragm structures can only perform a single action, that is, they can only indicate one monitoring state. If it is necessary to monitor the oil pressure and the pressure difference between the high and low pressure chambers at the same time, pressure sensors and differential pressure sensors need to be set separately, which increases the number of accessories in the lubricating oil system, increases the size and weight of the lubricating oil system, and makes it difficult to meet the needs of miniaturization. Summary of the Invention

[0004] The technical problem to be solved and the technical task proposed by the present invention is to improve the existing technology and provide a diaphragm assembly to solve the problem that the diaphragm structure of the current sensor can only act on one monitoring state, and multiple corresponding sensors are required when multiple monitoring is needed, which occupies a large volume and weight.

[0005] To solve the above technical problems, the technical solution of the present invention is as follows:

[0006] A diaphragm assembly includes an annular membrane, an annular plate, a diaphragm assembly, and an actuating member. The annular membrane has an annular region on its radially inner side connected to the annular plate. The diaphragm assembly includes a substrate and a diaphragm stacked and connected as a single unit. The diaphragm assembly is connected to the annular plate and covers the hollow region in the middle of the annular plate. The substrate has a perforated hole exposing the diaphragm. The actuating member is disposed at the perforated hole. The actuating member includes lever portions disposed on both sides of the diaphragm. One end of the lever portion is connected to the diaphragm, and the other end of the lever portion is cantilevered relative to the diaphragm.

[0007] Furthermore, the diaphragm is held and connected in the middle by two substrates, and the substrates on both sides of the diaphragm have hollow holes that expose the diaphragm.

[0008] Furthermore, the diaphragm is connected to the substrate via an annular weld.

[0009] Furthermore, the annular membrane is held and connected in the middle by two annular plates.

[0010] Furthermore, the diaphragm has rod-shaped protrusions along its surface at the perforated holes, and the lever portion of the actuating component is welded to the rod-shaped protrusions.

[0011] Furthermore, the lever portion of the actuating component is Z-shaped to form a cantilever.

[0012] Furthermore, the annular plate moves with the elastic deformation of the annular membrane to transmit displacement, and when one side of the lever portion of the actuating member is twisted, it drives the other side of the lever portion to twist to transmit torque.

[0013] A sensor comprising the diaphragm assembly described above.

[0014] Furthermore, including a main cavity, the radially peripheral region of the annular membrane of the diaphragm assembly is connected to the wall of the main cavity to divide the main cavity into an electrical structure chamber and a hydraulic chamber. The main cavity is also provided with a diaphragm member to divide the hydraulic chamber into a low-pressure chamber near the diaphragm assembly and a high-pressure chamber away from the diaphragm assembly. The high-pressure chamber is provided with a high-pressure oil port, the low-pressure chamber is provided with a low-pressure oil port, and a transmission member is provided in the low-pressure chamber.

[0015] When the pressure difference between the high-pressure chamber and the low-pressure chamber exceeds the pressure difference threshold, the diaphragm component 1 deforms and displaces towards the low-pressure chamber due to the pressure difference, and is then transmitted to the electrical structure cavity in sequence through the transmission component 1 and the actuating component to indicate the status.

[0016] When the pressure in the low-pressure chamber exceeds the low-pressure threshold, the annular membrane of the diaphragm assembly deforms to drive the annular plate to move towards the electrical structure cavity side for status indication.

[0017] Furthermore, the electrical structure chamber is provided with a mechanical alarm structure or a switch for giving an alarm electrical signal. The mechanical alarm structure or switch is driven by an actuating component or an annular plate to indicate the status.

[0018] Compared with the prior art, the advantages of this invention are:

[0019] The diaphragm assembly described in this invention can perform different actions, including displacement transmission and torque transmission, and can simultaneously monitor different states for indication. It can simultaneously monitor pressure and differential pressure, has high integration, small size, and light weight, and can reduce the number of accessories in the fuel lubricating oil system, meeting the needs of miniaturization development. Attached Figure Description

[0020] Figure 1 This is a cross-sectional schematic diagram of the diaphragm assembly of the present invention;

[0021] Figure 2 This is a top view of the diaphragm assembly of the present invention;

[0022] Figure 3 This is a schematic diagram of the diaphragm assembly of the present invention assembled on a sensor.

[0023] In the picture:

[0024] 21. Annular membrane, 22. Annular plate, 23. Actuating component, 24. Substrate, 25. Diaphragm, 26. Rod-shaped protrusion, 1. Main cavity, 2. Diaphragm assembly, 3. Diaphragm component 1, 11. High pressure chamber, 12. Low pressure chamber, 13. Electrical structure chamber, 14. High pressure oil port, 15. Low pressure oil port, 16. Transmission component 1. Detailed Implementation

[0025] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0026] The diaphragm assembly and sensor disclosed in this invention are capable of performing different actions, thereby enabling simultaneous monitoring of different states for indication. Specifically, they include simultaneous monitoring of oil pressure and the pressure difference between high and low pressure chambers. They are highly integrated, occupy a small volume, and are lightweight, which can reduce the number of accessories in the fuel lubricating oil system and meet the needs of miniaturization.

[0027] Example 1

[0028] like Figure 1 and Figure 2As shown, a diaphragm assembly mainly includes an annular membrane 21, an annular plate 22, a diaphragm assembly, and an actuating member 23. The annular region of the annular membrane 21 on the radially inner side is connected to the annular plate 22. The diaphragm assembly includes a substrate 24 and a diaphragm 25 that are stacked and connected as a single unit. The diaphragm assembly is connected to the annular plate 22 and covers the hollow region in the middle of the annular plate 22. The substrate 24 has a perforated hole exposing the diaphragm 25. The actuating member 23 is disposed at the perforated hole. The actuating member 23 includes lever portions disposed on both sides of the diaphragm 25. One end of the lever portion is connected to the diaphragm 25, and the other end of the lever portion is cantilevered relative to the diaphragm 25.

[0029] The annular membrane 21 and the annular plate 22 are combined to form an elastic body structure. The annular plate 22 moves with the elastic deformation of the annular membrane 21 to transmit displacement. The diaphragm assembly, which is formed by connecting the substrate 24 and the diaphragm 25, constitutes a rigid body structure. The actuating member 23 connected to the diaphragm assembly can be twisted relative to the diaphragm assembly. Specifically, when one side of the lever part of the actuating member 23 is twisted, it drives the other side of the lever part to twist to transmit torque.

[0030] In the installed state, the diaphragm assembly forms an isolation layer separating the two chambers. The radially peripheral region of the annular membrane 21 of the diaphragm assembly is connected to the wall of the chamber to separate the chambers. When the pressure in one chamber of the diaphragm assembly increases, the entire diaphragm assembly is subjected to pressure. When the pressure exceeds a threshold, the annular membrane 21 deforms due to the pressure, causing the annular plate 22 to move. In other words, the annular plate 22 moves under pressure, thus enabling status indication. At this time, the actuating member 23 will not twist due to the increased pressure in one chamber of the diaphragm assembly. In other words, the actuating member 23 will not perform status indication action due to the increased pressure in one chamber of the diaphragm assembly. When other transmission mechanisms directly touch the actuating member 23, that is, when other transmission mechanisms directly touch the lever portion on one side of the actuating member 23, the lever portion will be driven to twist relative to the diaphragm assembly. This causes the lever portion on the other side of the actuating member 23 to twist accordingly, thus transmitting displacement from one side of the diaphragm assembly to the other side. At this time, only the actuating member 23 undergoes a torsional transmission action, and the actuating member 23 does not drive the diaphragm assembly to move, that is, it does not drive the annular plate 22 to move. Therefore, when the actuating member 23 performs the status indication action, the annular plate 22 will not move to indicate the status. In other words, the status indication action of the actuating member 23 and the status indication action of the annular plate 22 are independent of each other and do not interfere with each other. Thus, the diaphragm assembly can transmit two signals simultaneously and can monitor two states simultaneously. When applied to a fuel lubricating oil system, it can simultaneously monitor the oil pressure and the pressure difference between the high and low pressure chambers, achieving functional integration. It has a high degree of integration, small size, and light weight, which is beneficial to reducing the number of accessories in the fuel lubricating oil system and meeting the needs of miniaturization.

[0031] In this embodiment, the diaphragm 25 is sandwiched between two substrates 24, that is, the substrates 24, the diaphragm 25 and the substrates 24 are stacked together in sequence. The substrates 24 on both sides of the diaphragm 25 have hollow holes that expose the diaphragm 25. The lever part of the actuating member 23 is connected to both sides of the diaphragm 25 at the hollow part to transmit torque. The substrates 24, the diaphragm 25 and the substrates 24 are connected into a diaphragm assembly by an annular welding part to form a rigid body structure, which not only ensures that the diaphragm 25 is effectively clamped and fixed, but also allows the diaphragm 25 to undergo elastic deformation. When the lever part on one side is touched at the hollow part, it drives the diaphragm 25 to deform, so that the lever part is twisted relative to the diaphragm assembly as a whole. The lever part on the other side will also be twisted accordingly due to the deformation of the diaphragm 25, thereby realizing the transmission of torque from one side of the diaphragm assembly to the other side. The annular plate 22 is also provided on both sides of the annular membrane 21, so that the annular membrane 21 is sandwiched and connected in the middle by the two annular plates 22. The annular membrane 21 and the annular plate 22 are welded together to ensure connection stability and sealing. When the annular membrane 21 deforms due to pressure, it can reliably drive the annular plate 22 to move to realize status indication.

[0032] Furthermore, the diaphragm 25 has rod-shaped protrusions 26 along its surface at the perforated holes. The lever portion of the actuating member 23 is welded to the rod-shaped protrusions 26. When the lever portion of the actuating member 23 is activated, the lever portion twists around the rod-shaped protrusions 26 to transmit torque, ensuring stable and reliable transmission. In this embodiment, the lever portion of the actuating member 23 is Z-shaped, so that when one end of the lever portion is connected to the diaphragm 25, it can reliably form a cantilever state. When the cantilever end of the lever portion is activated, it can effectively twist to transmit torque, thereby reliably achieving status indication.

[0033] like Figure 3As shown, a sensor includes the aforementioned diaphragm assembly, specifically, a main cavity 1. The radially peripheral region of the annular diaphragm 21 of the diaphragm assembly 2 is connected to the wall of the main cavity 1 to divide the main cavity 1 into an electrical structure chamber 13 and a hydraulic chamber. The main cavity 1 also contains a diaphragm component 3 to divide the hydraulic chamber into a low-pressure chamber 12 and a high-pressure chamber 11. The side closer to the diaphragm assembly 2 is the low-pressure chamber 12, and the side farther from the diaphragm assembly 2 is the high-pressure chamber 11. The high-pressure chamber 11 is provided with a high-pressure oil port 14 and is filled with high-pressure oil. The low-pressure chamber 12 is provided with a low-pressure oil port 15 and is filled with low-pressure oil. The main cavity 12 is provided with a transmission component 16. Specifically, the transmission component 16 includes a pusher and a disc spring. The pusher is slidably disposed in the through hole of the partition in the low-pressure chamber 12 of the main cavity 1. A disc spring for resetting is provided between the pusher and the partition. The structure is simple, easy to implement, and has good transmission reliability. In this embodiment, the main cavity 1 is composed of three separate parts: a left section, a middle section, and a right section. The annular region of the annular membrane 21 on the radially outer side is clamped between the left section and the middle section and welded and fixed. The circumferential outer edge region of the diaphragm component 3 is clamped between the middle section and the right section and welded and fixed. The structure is simple, easy to assemble, has good connection stability, and good sealing performance.

[0034] When the pressure difference between the high-pressure chamber 11 and the low-pressure chamber 12 exceeds the pressure difference threshold, the diaphragm component 3 deforms and shifts towards the low-pressure chamber 12 due to the pressure difference. This deformation is then transmitted sequentially to the electrical structure chamber 13 via the transmission component 16 and the actuating component 23 for status indication. Specifically, the diaphragm component 3 deforms towards the low-pressure chamber 12 due to the increased pressure difference between the high-pressure chamber 11 and the low-pressure chamber 12. The diaphragm component 3 pushes the transmission component 16 to move towards the side where the diaphragm assembly 2 is located. This causes the transmission component 16 to push the actuating component 23 on the diaphragm assembly 2 to actuate. The actuating component 23 is then transmitted to the electrical structure chamber 13 to touch the indicating component (not specifically shown in the figure) in the electrical structure chamber 13 for status indication and alarm. This process achieves pressure difference alarm, that is, monitoring the pressure difference between the high-pressure chamber 11 and the low-pressure chamber 12 and triggering an alarm when the pressure difference threshold is exceeded.

[0035] When the pressure in the low-pressure chamber 12 exceeds the low-pressure threshold, the annular membrane 21 of the diaphragm assembly 2 deforms to drive the annular plate 22 to move towards the electrical structure chamber 13 for status indication. Specifically, the annular membrane 21 of the diaphragm assembly 2 is pushed and deformed towards the electrical structure chamber 13 due to the increase in the low-pressure hydraulic pressure in the low-pressure chamber 12, thereby causing the annular plate 22 to move in the electrical structure chamber 13. This allows the indicator component in the electrical structure chamber 13 to be touched for status indication and alarm. This process achieves pressure alarm, that is, monitoring the pressure in the low-pressure chamber 12 and triggering an alarm when it exceeds the low-pressure threshold.

[0036] When the oil pressure in the low-pressure chamber 12 increases, the annular plate 22 will shift towards the electrical structure chamber 13 due to the deformation of the annular diaphragm 21. The diaphragm assembly, composed of the substrate 24 and the diaphragm 25, is connected to the annular plate 22, and thus moves with the annular plate 22. However, the deformation of the annular diaphragm 21 is relatively small, resulting in a small displacement of the annular plate 22. In other words, the displacement of the diaphragm assembly, composed of the substrate 24 and the diaphragm 25, is small, thus affecting the movement of the actuating member 23 connected to the diaphragm assembly. The displacement is small and will not cause the indicator to activate to issue an alarm. However, when the pressure difference between the high-pressure chamber 11 and the low-pressure chamber 12 exceeds the pressure difference threshold, the actuating component 23 is driven by the transmission component 16 to activate. The transmission process of the actuating component 23 is a torsional rotation, so the amount of movement transmitted by the actuating component 23 is large enough to cause the indicator to activate to issue an alarm. Therefore, the diaphragm assembly described in this embodiment reliably realizes two transmission functions, so that the transmission process of the pressure difference alarm and the transmission of the pressure alarm are independent of each other and do not affect each other.

[0037] The indicating component in the electrical structure chamber 13 can be a mechanical alarm structure, which can be a signal cap structure. The signal cap structure includes a signal cap and a holding mechanism. The holding mechanism can be an elastic mechanism or a magnetic mechanism, etc. The signal cap is held in the initial state by the holding mechanism. When the diaphragm assembly moves, the signal cap is pushed out to provide a mechanical alarm, which has a good alarm effect and good stability. The indicating component in the electrical structure chamber 13 can also be a switch for giving an alarm electrical signal. The switch can be a micro switch. When the diaphragm assembly moves, the touch state of the micro switch is changed so that the switch emits a signal different from the normal state to provide an alarm.

[0038] The above are merely preferred embodiments of the present invention. It should be noted that the above preferred embodiments should not be considered as limitations on the present invention, and the scope of protection of the present invention should be determined by the scope defined in the claims. For those skilled in the art, several improvements and modifications can be made without departing from the spirit and scope of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A diaphragm assembly, characterized in that, The device includes an annular membrane (21), an annular plate (22), a diaphragm assembly, and an actuating member (23). The annular region of the annular membrane (21) on the radially inner side is connected to the annular plate (22). The diaphragm assembly includes a substrate (24) and a diaphragm (25) that are stacked and connected as a single unit. The diaphragm assembly is connected to the annular plate (22) and covers the hollow region in the middle of the annular plate (22). The substrate (24) has a perforated hole that exposes the diaphragm (25). The actuating member (23) is provided at the perforated hole. The actuating member (23) includes levers provided on both sides of the diaphragm (25). One end of the lever is connected to the diaphragm (25), and the other end of the lever is cantilevered relative to the diaphragm (25).

2. The diaphragm assembly according to claim 1, characterized in that, The diaphragm (25) is sandwiched between two substrates (24) and has hollow holes on the substrates (24) on both sides of the diaphragm (25) that expose the diaphragm (25).

3. The diaphragm assembly according to claim 1, characterized in that, The diaphragm (25) is connected to the substrate (24) via an annular weld.

4. The diaphragm assembly according to claim 1, characterized in that, The annular membrane (21) is held in the middle by two annular plates (22).

5. The diaphragm assembly according to claim 1, characterized in that, The diaphragm (25) has a rod-shaped protrusion (26) along the surface of the diaphragm (25) at the hollow hole, and the lever part of the actuating member (23) is welded to the rod-shaped protrusion (26).

6. The diaphragm assembly according to claim 5, characterized in that, The lever portion of the actuating component (23) is bent in a Z-shape to form a cantilever.

7. The diaphragm assembly according to claim 1, characterized in that, The annular plate (22) moves with the elastic deformation of the annular membrane (21) to transmit displacement, and when the lever part on one side of the actuating member (23) is twisted, it drives the lever part on the other side to twist to transmit torque.

8. A sensor, characterized in that, Includes the membrane assembly as described in any one of claims 1 to 7.

9. The sensor according to claim 8, characterized in that, The main cavity (1) includes a diaphragm assembly (2) whose annular membrane (21) is connected to the wall of the main cavity (1) to divide the main cavity (1) into an electrical structure chamber (13) and a hydraulic chamber. The main cavity (1) is also provided with a diaphragm component (3) to divide the hydraulic chamber into a low-pressure chamber (12) near the diaphragm assembly (2) and a high-pressure chamber (11) away from the diaphragm assembly (2). The high-pressure chamber (11) is provided with a high-pressure oil port (14), the low-pressure chamber (12) is provided with a low-pressure oil port (15), and a transmission component (16) is provided in the low-pressure chamber (12). When the pressure difference between the high-pressure chamber (11) and the low-pressure chamber (12) exceeds the pressure difference threshold, the diaphragm component (3) deforms and shifts towards the low-pressure chamber (12) due to the pressure difference, and is transmitted to the electrical structure chamber (13) in sequence through the transmission component (16) and the actuating component (23) for status indication. When the pressure in the low-pressure chamber (12) exceeds the low-pressure threshold, the annular membrane (21) of the diaphragm assembly (2) deforms to drive the annular plate (22) to move toward the electrical structure chamber (13) to indicate the status.

10. The sensor according to claim 9, characterized in that, The electrical structure chamber (13) is provided with a mechanical warning structure or a switch for giving a warning electrical signal. The mechanical warning structure or switch is driven by an actuating component (23) or an annular plate (22) to indicate the status.

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