Loading device and connecting device for preventing current interference

Abstract

The invention relates to the technical field of aircraft structure tests, in particular to a current interference prevention loading connecting device which comprises a flange plate loading connector, a first insulating spacer and a fixing part. The flange plate loading connector is provided with a connecting shaft and a flat-head cap located at one end of the connecting shaft. The flat-head cap is provided with a plurality of penetrating holes distributed in the circumferential direction. The flat head caps of the two flange plate loading connectors are in butt joint and are separated by a first insulation spacer, the first insulation spacer is provided with through holes corresponding to the penetrating holes of the flange plate loading connectors, and a plurality of fixing pieces are inserted into the penetrating holes of the two flange plate loading connectors and the through holes to connect the two flange plate loading connectors and the first insulation spacer together. The problem of accurately applying the force load by the electric cylinder is solved, the current interference of the motor of the electric cylinder on the high-sensitivity force sensor is avoided, the caused loading fluctuation is avoided, and the accurate loading is ensured.

Description

Technical Field

[0001] The invention relates to the technical field of aircraft structure testing, and in particular to a loading connection device capable of preventing current interference. Background Art

[0002] Aircraft structural static / fatigue testing is one of the most important components in assessing the structural integrity of an aircraft. Servo hydraulic actuators, as loading actuators, play an important role in the test.

[0003] With the energy conservation and environmental protection, the concept of green aviation is becoming more and more popular. Servo loading control systems based on electric cylinders have emerged. Compared with traditional servo hydraulic cylinders, electric cylinders have obvious advantages in performance, efficiency, environmental protection, etc., and have been widely used in many fields of the aviation industry.

[0004] However, electric cylinders are not used as force loading actuators in aircraft structural static / fatigue tests. The main reason is that the force loading sensor is a high-sensitivity millivolt sensor, which is easily disturbed by the electric cylinder motor current, causing the loading load to fluctuate and cannot be applied accurately. How to ensure that the force sensor installed on the electric cylinder is not affected by the motor current interference is a technical difficulty and problem that needs to be solved in whether the electric cylinder can be promoted and applied in aircraft strength tests. Summary of the invention

[0005] In order to solve the above problems, the present application provides a current interference-proof loading connection device, comprising:

[0006] A flange loading joint, a first insulating gasket and a fixing member;

[0007] The flange loading joint has a connecting shaft and a flat cap at one end of the connecting shaft, the flat cap has a plurality of circumferentially distributed through holes; the flat caps of the two flange loading joints are butt-jointed together and separated by a first insulating gasket, the first insulating gasket has through holes corresponding to the through holes of the flange loading joint, and a plurality of fixing parts are respectively inserted into the through holes of the two flange loading joints and the through holes to connect the two flange loading joints with the first insulating gasket.

[0008] Preferably, the fixing member comprises a metal bolt, an insulating sleeve is sleeved on the outer side of the metal bolt, and second insulating gaskets are respectively arranged at both ends of the metal bolt.

[0009] Preferably, the second insulating gasket comprises a circular ring with a central circular hole, on which are distributed through holes corresponding to the through holes of the flange loading joint, and two second insulating gaskets are respectively sleeved on the connecting shafts of the two flange loading joints to isolate the fixing member from the flange loading joint.

[0010] Preferably, the insulating sleeve is made of polyurethane.

[0011] Preferably, the first insulating spacer is made of polyurethane.

[0012] Preferably, the second insulating spacer is made of polyurethane.

[0013] Preferably, the fixing member is made of insulating material.

[0014] A loading device for preventing current interference, comprising:

[0015] An electric cylinder, a force sensor and the loading connection device for preventing current interference;

[0016] The connecting shaft of one flange loading joint of the loading connection device is connected to the actuating end of the electric cylinder, and the connecting shaft of the other flange loading joint is connected to the force sensor. The force sensor connects the electric cylinder to the force sensor through a threaded structure.

[0017] Advantages of this application include:

[0018] 1) Solve the problem of accurate force load application of electric cylinders, avoid the current interference of electric cylinder motors on high-sensitivity force sensors, eliminate the loading fluctuations caused by this, and ensure accurate loading;

[0019] 2) Use insulating gaskets to connect the two flange loading joints in a cross-combination connection. At the same time, design an insulating sleeve to wrap the connecting bolts to prevent the side wall from contacting the flange joint, and use polyurethane, an insulating material, to block the current conduction between the two loading joints. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of a current interference-proof loading connection device according to a preferred embodiment of the present application.

[0021] Figure 2 It is an exploded view of a current interference prevention loading device according to a preferred embodiment of the present application. DETAILED DESCRIPTION

[0022] In order to make the technical solution and advantages of the present application clearer, the technical solution of the present application will be further described in detail in detail and in detail in conjunction with the accompanying drawings. It can be understood that the specific embodiments described here are only partial embodiments of the present application, which are only used to explain the present application, not to limit the present application. It should be noted that, for the convenience of description, only the parts related to the present application are shown in the accompanying drawings, and other related parts can refer to the general design. In the absence of conflict, the embodiments in the present application and the technical features in the embodiments can be combined with each other to obtain new embodiments.

[0023] In order to solve the above problems, the present application provides a current interference-proof loading connection device, including: Figure 1 As shown:

[0024] Flange loading joint 2, first insulating gasket 4 and fixing member 5;

[0025] The flange loading joint 2 has a connecting shaft and a flat cap at one end of the connecting shaft, the flat cap has multiple circumferentially distributed through holes; the flat caps of the two flange loading joints 2 are butt-jointed together and separated by a first insulating gasket 4, the first insulating gasket 4 has through holes corresponding to the through holes of the flange loading joint 2, and multiple fixings 5 ​​are respectively inserted into the through holes of the two flange loading joints 2 and the through holes to connect the two flange loading joints 2 with the first insulating gasket 4.

[0026] Preferably, the fixing member 5 comprises a metal bolt, an insulating sleeve 3 is sleeved on the outside of the metal bolt, and second insulating gaskets 1 are respectively arranged at both ends of the metal bolt.

[0027] Preferably, the second insulating gasket 1 comprises a ring with a central circular hole, and through holes corresponding to the perforations of the flange loading joint 2 are distributed on the ring, and two second insulating gaskets 1 are respectively sleeved on the connecting shafts of the two flange loading joints 2 to isolate the fixing member 5 from the flange loading joint 2. Among them, the materials of the first insulating gasket 4, the insulating sleeve 3, and the second insulating gasket 1 are all made of polyurethane. The insulating sleeve 3 is designed to wrap the fixing member 5 to prevent the side wall from contacting the flange joint for current conduction.

[0028] The first insulating gasket 4 is designed to be cross-connected in the form of a flange to physically isolate the two flange loading joints 2 to prevent the electric cylinder motor from interfering with the current of the force sensor.

[0029] In one embodiment, not shown in the figure, a stainless steel gasket is used between the fixing member 5 and the second insulating gasket 1. The stainless steel gasket is a circular ring with a center hole. The circular ring has a circumferential through hole, and the diameter of the center hole is larger than the diameter of the connecting shaft of the flange loading joint 2 to avoid the stainless steel gasket and the flange loading joint 2 from contacting and conducting electricity. The stainless steel gasket is used to disperse the concentrated pressure of the fixing member 5 to avoid squeezing and damaging the first insulating gasket 4, which would cause hidden dangers in current conduction.

[0030] In another embodiment, the fixing member 5 is made of insulating material.

[0031] A loading device for preventing current interference, such as Figure 2 As shown, including,

[0032] The electric cylinder 01, the force sensor 03 and the loading connection device for preventing current interference;

[0033] The connecting shaft of one flange loading joint 2 of the loading connection device is connected to the actuating end of the electric cylinder 01, and the connecting shaft of the other flange loading joint 2 is connected to the force sensor 03. The force sensor 03 connects the electric cylinder 01 to the force sensor 03 through a threaded structure.

[0034] Advantages of this application include:

[0035] 1) Solve the problem of accurate force load application of electric cylinders, avoid the current interference of electric cylinder motors on high-sensitivity force sensors, eliminate the loading fluctuations caused by this, and ensure accurate loading;

[0036] 2) Use insulating gaskets to connect the two flange loading joints in a cross-combination connection. At the same time, design an insulating sleeve to wrap the connecting bolts to prevent the side wall from contacting the flange joint, and use polyurethane, an insulating material, to block the current conduction between the two loading joints.

[0037] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be based on the protection scope of the claims.

Claims

1. A loading connection device for preventing current interference, characterized in that: include: A flange loading joint (2), a first insulating gasket (4) and a fixing member (5); The flange loading joint (2) comprises a connecting shaft and a flat cap located at one end of the connecting shaft, the flat cap having a plurality of circumferentially distributed through holes; the flat caps of the two flange loading joints (2) are butted together and separated by a first insulating gasket (4), the first insulating gasket (4) having through holes corresponding to the through holes of the flange loading joint (2), and a plurality of fixing members (5) are respectively inserted into the through holes of the two flange loading joints (2) and the through holes to connect the two flange loading joints (2) and the first insulating gasket (4) together.

2. The current interference-proof loading connection device according to claim 1, characterized in that: The fixing member (5) comprises a metal bolt, an insulating sleeve (3) is sleeved on the outside of the metal bolt, and second insulating gaskets (1) are respectively arranged at both ends of the metal bolt.

3. The current interference-proof loading connection device according to claim 2, characterized in that: The second insulating gasket (1) comprises a circular ring with a central circular hole, and through holes corresponding to the through holes of the flange loading joint (2) are distributed on the circular ring. The two second insulating gaskets (1) are respectively sleeved on the connecting shafts of the two flange loading joints (2) to isolate the fixing member (5) from the flange loading joint (2).

4. The current interference-proof loading connection device according to claim 2, characterized in that: The material of the insulating sleeve (3) is polyurethane.

5. The current interference-proof loading connection device according to claim 2, characterized in that: The material of the first insulating gasket (4) is polyurethane.

6. The current interference-proof loading connection device according to claim 2, characterized in that: The material of the second insulating gasket (1) is polyurethane.

7. The current interference-proof loading connection device according to claim 2, characterized in that: The fixing member (5) is made of insulating material.

8. A loading device for preventing current interference, characterized in that: include: An electric cylinder (01), a force sensor (03), and a current interference-proof loading connection device (02) as claimed in any one of claims 1 to 7; The connecting shaft of one flange loading joint (2) of the loading connection device (02) is connected to the actuating end of the electric cylinder (01), and the connecting shaft of the other flange loading joint (2) is connected to the force sensor (03).

9. The current interference prevention loading device according to claim 8, characterized in that: include: The force sensor (03) connects the electric cylinder (01) and the force sensor (03) via a threaded structure.

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