Shaft pin sensor for lifting equipment anti - overload protection

Shaft pin sensor for lifting equipment anti - overload protection

Shaft pin sensor is widely used in our industry, at present, many enterprises are in the understanding of the application range of shaft pin sensor, nothing more than to think that enterprises have a good direction of housing exhibition, if your enterprise does not understand shaft pin sensor, small series will lead you to understand shaft pin sensor. Then, the introduction of shaft pin sensor and characteristics of what? Next, let's see how the sales engineer of Shenzhen Lizhu Sensor Technology Co., LTD. Introduces the shaft pin sensor.

Introduction to application: The shaft pin type sensor, due to its customizable dimensions, can replace the shaft pin that plays a connecting role in the lifting device, and simultaneously measure and monitor the weight of the heavy lifting device, thus playing the role of anti-overload protection and enhancing the safety of the work site.

Shaft pin sensor is actually a bear shear effect of circular hollow section axis, double shear resistance strain gauge paste in the position of center hole groove center, there are two groups of bridge measurement methods, namely the two grooves type double shear resistance strain gauge to form a wheatstone bridge, or forming an wheatstone bridge again parallel measurements.

The shaft pin sensor has the following characteristics:

1. The elastic element is a hollow circular axis with compact structure and simple geometric shape, which is easy to be processed with high size and shape and position accuracy;

2. The hollow section has strong resistance to torsion and bending, and the stress at the neutral shaft of the shaft pin is the largest;

3. When the hollow section shaft pin is subjected to vertical and horizontal bending, the section with zero bending moment is in the same section;

4. When designing the shaft pin sensor with a large capacity, the center hole is also large, and the double-shear electronegative strain gauge can be pasted into the hole, which is well protected and can implement the vacuum filled inert gas sealing process;

5. Easy to assemble and use with relevant load-bearing parts.

The disadvantage of shaft pin sensor is that the production process is difficult and more special tools and equipment are needed.

Force and theory

The shaft pin sensor can be simplified as a hollow section beam simply supported at both ends and acted on by a concentrated load of hormone P in the middle. Its mechanical model and hollow section are shown in Figure 2.

Shaft pin sensor output affected by many factors, mainly has the diameter of the shaft pin center hole d, grooves, the minimum diameter d, the space between the negative pin and support, support the hardness of the size of the type and double shear resistance strain gage, etc., should recognize each other when structure design and calculation, the relationship between one size selection optimization to ensure minimum shaft pin sensor performance fluctuations

The manufacturing technology, detection and application technology of shaft pin sensor

The manufacturing process of the shaft pin structure is exactly the same as that of other structure weight sensors, except that the double-shear resistance strain gauge is stuck in the deep hole, so special sandblasting treatment, marking and patch, pressure curing tools and equipment need to be purchased and designed.

Detection and application technology

Since the shaft pin sensor itself is an integral elastic element, that is, there is no protective shell and no loading head and bearing base, the same boundary support should be used in the test and calibration as in the actual installation and use, and the best is the same support.

In recent years, the shaft pin sensor is mainly used in the field of electronic crane scale, with U - shaped rings, assembled into a number or wireless transmission electronic crane scale is the most common. Because the shaft pin is directly assembled with the lifting ring and hook, not only the bearing shell with complex structure is eliminated, but also the assembly precision is improved, ensuring the weighing accuracy.

Warm tip: the above mainly introduced the shaft pin sensor related introduction and characteristics, if you have any questions about the shaft pin sensor, you can through our hotline or online consultation, we will contact you in the first time, thank you for your call.