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Sealing device of underwater test force measuring balance and use method of sealing device

A technology for sealing devices and force-measuring balances, which is applied to measuring devices, measuring fluid pressure, and measuring the rate of increase and deceleration of fluids. Waterlogging, water seepage and other problems, achieve the effect of low cost of watertight structure, good watertight effect, and ensure the effect of measurement accuracy

Pending Publication Date: 2022-07-08
CHINA SHIP SCIENTIFIC RESEARCH CENTER (THE 702 INSTITUTE OF CHINA SHIPBUILDING INDUSTRY CORPORATION)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the prior art, the watertight method of the force-strain balance in the underwater test model is mainly to directly pour sealant on the strain balance measurement unit, so that the pasted strain gauges are fully isolated from the external medium to achieve watertightness; the advantage is that the cost Low, easy to operate, the balance body can be directly in contact with water; however, because the sealant is prone to water accumulation and water seepage due to peeling and aging, the resistance insulation value of the strain gauge will drop or even be damaged by short circuit; on the other hand, the sealant Finally, there will be shrinkage stress, which will also cause micro-strain to the strain balance unit, thereby reducing the measurement accuracy and service life of the strain balance

Method used

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  • Sealing device of underwater test force measuring balance and use method of sealing device
  • Sealing device of underwater test force measuring balance and use method of sealing device
  • Sealing device of underwater test force measuring balance and use method of sealing device

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Embodiment Construction

[0043] The specific embodiments of the present invention will be described below with reference to the accompanying drawings.

[0044] like figure 1 , figure 2 , image 3 and Figure 5 As shown, a sealing device for an underwater test force-measuring balance in this embodiment includes a watertight box 1 with an upper opening, and the open end of the watertight box 1 is sealed and equipped with a cover plate 2 to form an inflatable cavity, which penetrates the cover plate 2 up and down. A balance support rod 7 is installed, the bottom end of the balance support rod 7 extends into the watertight box 1, and a force measuring balance 3 is installed between the bottom of the balance support rod 7 and the inner wall surface of the watertight box 1; the outer wall surface of the balance support rod 7 and the cover plate There is a distance between 2 and the outer wall surface of the balance support rod 7 is fitted with a flexible sealing sleeve 6, the bottom edge of the flexible...

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PUM

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Abstract

The sealing device comprises a watertight box with an opening in the upper portion, a cover plate is assembled at the opening end of the watertight box in a sealed mode to form an inflatable cavity, a balance supporting rod vertically penetrates through the cover plate to be installed, and the bottom end of the balance supporting rod extends into the watertight box. A force measuring balance is installed between the bottom of the balance supporting rod and the inner wall face of the watertight box. A distance exists between the outer wall surface of the balance support rod and the cover plate, the outer wall surface of the balance support rod is sleeved with a flexible sealing sleeve in an interference manner, the bottom edge of the flexible sealing sleeve laterally extends along the circumferential direction to form a horizontal part, and the horizontal part is attached and fixed to the top surface of the cover plate, so that the sealing installation of the force measuring balance in the watertight box is realized; and the balance supporting rod connected with the force measuring balance is flexibly sealed and installed through the flexible sealing sleeve, so that the stability and the reliability of the testing precision of the force measuring balance are greatly ensured while the sealing performance is ensured.

Description

technical field [0001] The invention relates to the technical field of underwater test measurement equipment, in particular to a sealing device for an underwater test force measuring balance and a method for using the same. Background technique [0002] The underwater test model is usually pulled by a trailer equipped with a pool to complete different attitude and motion tests. During the test, the hydrodynamic parameters of the model are measured by a force-measuring strain balance fixed to the model. [0003] In the prior art, the watertight method of the force measuring strain balance in the underwater test model is mainly to directly pour sealant on the strain balance measurement unit, so that the pasted strain gauge is fully isolated from the external medium to achieve watertightness; the advantage is the cost. Low, easy to operate, the balance body can be in direct contact with water; however, because the sealant is prone to water accumulation and water seepage due to ...

Claims

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Application Information

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IPC IPC(8): G01L19/06G01L19/14G01M3/26
CPCG01L19/0672G01L19/147G01M3/26
Inventor 李明政刘俊亮司朝善
Owner CHINA SHIP SCIENTIFIC RESEARCH CENTER (THE 702 INSTITUTE OF CHINA SHIPBUILDING INDUSTRY CORPORATION)
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