A dynamic coil structure with a temperature measuring device

Abstract

The present invention discloses a dynamic coil structure with a temperature measuring device, the dynamic coil structure includes a dynamic coil frame and a dynamic coil winding, and also includes a temperature measuring device, the temperature measuring device includes a platinum resistor and two leads, the platinum resistor is bonded to the surface of the dynamic coil winding, and a receiving groove for receiving the leads is provided from bottom to top on the outer wall of the dynamic coil frame, one end of the lead is connected to the platinum resistor, and the other end passes through the receiving groove from bottom to top and then leads out from the top of the receiving groove. The temperature measuring device of the present invention is connected to the dynamic coil frame through the temperature measuring device, which is not only more reliable and will not fall off due to the reciprocating motion of the dynamic coil, but also, because the platinum resistor is in direct contact with the dynamic coil winding, the temperature measured by it can more accurately reflect the temperature of the dynamic coil winding itself, reducing the potential safety hazard caused by the excessively high coil temperature, and further increasing the safety and reliability of the equipment operation.

Description

Technical Field

[0001] The invention relates to the technical field of electric vibration tables, and in particular to a moving coil structure with a temperature measuring device. Background Art

[0002] As a mechanical environment testing equipment, electric vibration table has been widely used in aviation, aerospace, electrical and electronics, weapons, rail transportation and other fields because of its wide frequency range, small waveform distortion, easy automatic control and other advantages.

[0003] The electric vibration table is generally composed of a table body, a magnetic cylinder, an excitation coil winding, a moving coil, an elastic support device and a guide mechanism. As one of the important components of the electric vibration table, the working safety and reliability of the moving coil is particularly important. The moving coil is usually composed of a moving coil frame and a moving coil winding. The moving coil winding is usually wound on the lower part of the moving coil frame and solidified with the moving coil frame through high-temperature epoxy glue. When the electric vibration table is working, the moving coil winding is passed through an alternating current and reciprocates in the annular DC magnetic field air gap. For the electric vibration table, the moving coil winding, because the current value passed through it is usually relatively large, up to several thousand amperes, the heat generated by the coil itself is often very high, and the temperature of the coil will gradually increase. For the electric vibration table, the coil is usually cooled, but if the cooling air volume is not enough, the temperature after cooling may not meet the design requirements. In this way, not only will the increased resistance value of the coil winding have a significant adverse effect on the peak thrust generated by the driving coil, but also, as the temperature is locally too high, the high-temperature curing glue may soften and cause the coil winding to fall off, seriously affecting the safety and reliability of the platform operation.

[0004] In order to solve the above problems, patent 200720148555.6 (non-contact temperature measuring device for driving coil) discloses a non-contact temperature measuring device, which measures the temperature of the surface of the driving coil, and the error between this device and the actual temperature value of the coil is relatively large. Sometimes, although the value displayed by the temperature measuring device is less than the set value, the moving coil has been burned out due to overheating. Summary of the invention

[0005] In view of the shortcomings of the prior art, the present invention aims to provide a contact-type moving coil structure that can directly measure the temperature of the moving coil winding. The following technical solutions are adopted:

[0006] A dynamic coil structure with a temperature measuring device comprises a dynamic coil frame and a dynamic coil winding, and also comprises a temperature measuring device, wherein the temperature measuring device comprises a platinum resistor and two lead wires, wherein the platinum resistor is bonded to the surface of the dynamic coil winding, and an accommodating groove for accommodating the lead wires is provided from bottom to top on the outer wall of the dynamic coil frame, wherein one end of the lead wire is connected to the platinum resistor, and the other end of the lead wire passes through the accommodating groove from bottom to top and is led out from above the accommodating groove.

[0007] As a further improvement of the present invention, the lead wire is led out from above the accommodating groove and then fixed on a support of the platform.

[0008] As a further improvement of the present invention, a silicone tube is sleeved on the lead wire led out from the top of the accommodating groove to the support on the platform body, one end of the silicone tube is connected to the dynamic coil frame through a pressing plate, and the other end is connected to the support through a pressing plate.

[0009] As a further improvement of the present invention, the platinum resistor and the moving coil winding are connected by high temperature curing.

[0010] As a further improvement of the present invention, the surface of the lead wire in the receiving groove is coated with adhesive, and the lead wire in the receiving groove is connected to the dynamic coil frame through the adhesive.

[0011] As a further improvement of the present invention, the adhesive is room temperature epoxy adhesive.

[0012] As a further improvement of the present invention, the platinum resistor is Pt100.

[0013] As a further improvement of the present invention, the lead wire is fixed on the platinum resistor by welding.

[0014] Beneficial effects of the present invention:

[0015] The temperature measuring device of the present invention is connected to the dynamic coil frame through the temperature measuring device, which is not only relatively reliable and will not fall off due to the reciprocating motion of the dynamic coil, but also, because the platinum resistor is in direct contact with the dynamic coil winding, the measured temperature can more accurately reflect the temperature of the dynamic coil winding itself, reducing the safety hazard caused by the excessively high coil temperature and further increasing the safety and reliability of the equipment operation.

[0016] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present invention more obvious and easy to understand, the following specifically cites a preferred embodiment and describes it in detail with the accompanying drawings as follows. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic structural diagram of a moving coil structure with a temperature measuring device in an embodiment of the present invention;

[0018] Figure 2 It is a partial structural schematic diagram of a moving coil structure with a temperature measuring device in an embodiment of the present invention;

[0019] Figure 3 It is a schematic structural diagram of a moving coil winding and a temperature measuring device in an embodiment of the present invention.

[0020] Marking instructions: 100, platform; 110, support; 10, dynamic coil frame; 11, receiving groove; 20, dynamic coil winding; 30, lead wire; 40, platinum resistor; 50, pressure plate; 60, silicone tube. DETAILED DESCRIPTION

[0021] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments so that those skilled in the art can better understand the present invention and implement it, but the embodiments are not intended to limit the present invention.

[0022] like Figure 1-3 As shown in FIG. 1 , a dynamic coil structure with a temperature measuring device in an embodiment of the present invention is shown. The dynamic coil structure includes a dynamic coil frame 10 and a dynamic coil winding 20 .

[0023] In this embodiment, the dynamic coil structure further includes a temperature measuring device, which includes a platinum resistor 40 and two lead wires 30. The platinum resistor 40 is bonded to the surface of the dynamic coil winding 20. Preferably, the platinum resistor 40 and the dynamic coil winding 20 are connected by high temperature curing. In this embodiment, the platinum resistor is Pt100.

[0024] The outer wall of the dynamic coil frame 10 is provided with a receiving groove 11 for receiving the lead wire 30 from bottom to top. One end of the lead wire 30 is connected to the platinum resistor 40, and the other end passes through the receiving groove 11 from bottom to top and is led out from the top of the receiving groove 11. The resistance value of the platinum resistor 40 can be measured through the lead wire 30, and the surface temperature of the dynamic coil winding 20 can be obtained.

[0025] In this embodiment, the lead wire 30 is fixed to the platinum resistor 40 by welding. Preferably, the welding is performed by soldering.

[0026] Preferably, the surface of the lead wire 30 in the receiving groove 11 is coated with adhesive, and the lead wire 30 in the receiving groove is connected to the dynamic coil frame 10 through the adhesive. More preferably, the adhesive is room temperature epoxy adhesive.

[0027] Preferably, the lead wire 30 is led out from the upper side of the receiving groove 11 and then fixed on the support 110 of the platform 100. The lead wire 30 on the support 110 is connected to the connection terminal on the platform 100.

[0028] Preferably, a silicone tube 60 is sleeved on the lead 30 led from the top of the accommodating groove 11 to the support 110 of the platform 100, one end of the silicone tube 60 is connected to the dynamic coil frame 10 through the pressing plate 50, and the other end is connected to the support 110 through the pressing plate 50. More preferably, the silicone tube 60 is arc-shaped, and its curvature meets the vibration displacement amplitude of the moving parts of the vibration platform.

[0029] Preferably, the number of temperature measuring devices in each temperature measuring device is two, one of which is a spare. When one is damaged, the other is activated to further increase safety and reliability.

[0030] The temperature measuring device of the present invention is connected to the dynamic coil frame through the temperature measuring device, which is not only relatively reliable and will not fall off due to the reciprocating motion of the dynamic coil, but also, because the platinum resistor is in direct contact with the dynamic coil winding, the measured temperature can more accurately reflect the temperature of the dynamic coil winding itself, reducing the safety hazard caused by the excessively high coil temperature and further increasing the safety and reliability of the equipment operation.

[0031] The above embodiments are only preferred embodiments for fully illustrating the present invention, and the protection scope of the present invention is not limited thereto. Equivalent substitutions or changes made by those skilled in the art based on the present invention are within the protection scope of the present invention. The protection scope of the present invention shall be subject to the claims.

Claims

1. A dynamic coil structure with a temperature measuring device, comprising a dynamic coil frame and a dynamic coil winding, characterized in that: It also includes a temperature measuring device, which includes a platinum resistor and two lead wires. The platinum resistor is bonded to the surface of the dynamic coil winding. A receiving groove for receiving the lead wire is provided from bottom to top on the outer wall of the dynamic coil frame. One end of the lead wire is connected to the platinum resistor, and the other end passes through the receiving groove from bottom to top and is led out from above the receiving groove; the lead wire is fixed on the support of the table body after being led out from above the receiving groove, and a silicone tube is sleeved on the lead wire led from above the receiving groove to the support of the table body, one end of the silicone tube is connected to the dynamic coil frame through a pressing plate, and the other end is connected to the support through a pressing plate; there are two temperature measuring devices, one of which is a spare, and when one is damaged, the other is activated.

2. The moving coil structure with a temperature measuring device according to claim 1, characterized in that: The platinum resistor and the moving coil winding are connected by high temperature curing.

3. The moving coil structure with a temperature measuring device according to claim 1, characterized in that: The surface of the lead wire in the receiving groove is coated with adhesive, and the lead wire in the receiving groove is connected to the dynamic coil frame through the adhesive.

4. The moving coil structure with a temperature measuring device according to claim 3, characterized in that: The adhesive is room temperature epoxy adhesive.

5. The moving coil structure with a temperature measuring device according to claim 1, characterized in that: The platinum resistor is Pt100.

6. The moving coil structure with a temperature measuring device according to claim 1, characterized in that: The lead wire is welded and fixed on the platinum resistor.

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