Flat disk Rotary Damper mainly used for large diameter, small height space. Disk dampers provide energy absorption and rotational deceleration. We offer many different models from mild to extreme. Our disk dampers are the perfect solution for a wide range of applications, from scanner, and glove boxes to auditorium seating to. Disk dampers are designed to control and smooth out the opening and closing of lids, and doors.
Our damper is
conducive to performing structural movement in soft, silent and safe
environment, mitigating impact load, avoiding strike damage, prolonging
mechanical life, reducing noise disturbance, improving product quality and
improve customer satisfaction.
NOTE:
Applied torque:(T)
The damper square hole coordinateswith the rotation axis dimension tolerance.
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A portable soil moisture meter was used to measure the soil moisture in the experimental area. It was found that the average withered humidity of 0-200 cm in the test area was 70.4 g/kg, and the average water holding capacity in the field was 152.5 g/kg, which was equivalent to that in 200 cm soil layer. The maximum effective water storage is 404.9mm. The average infiltration rate in the first 1 min measured in the field using a permeation canister method can reach 12 mm/min, and after 24 min, the infiltration can be basically achieved. The infiltration rate is 1.2 mm/min. This result is close to the soil infiltration rate measured in the Loess Plateau and belongs to a better type of permeability. This is closely related to the higher content of water-stable aggregates in 0-20 cm and 20-35 cm soil layers. The soil moisture content was measured with a portable soil moisture meter. The depth was 200 cm per 10 cm layer. The moisture data of 10 positioning observation points were analyzed and analyzed, and the variation law of soil moisture in the test area was obtained.
The change of surface soil moisture content was the largest, reflecting that precipitation and evapotranspiration had a greater impact on the surface soil moisture content, and less impact on the underlying soil moisture content change. It shows that precipitation and evapotranspiration have little effect on the soil moisture in the lower layer. Changes in soil moisture in different soil layers can be described by the coefficient of variation CV. We make a regression analysis of the average value of the coefficient of variation of the soil moisture content at different observation points with the depth of the soil profile, and conclude that the coefficient of variation CV decreases with the depth as a function of power.
The portable soil moisture measuring instrument also found that fertilization has a certain influence on the change of soil moisture. The soil moisture content of phosphate fertilizer treatment is lower than that of nitrogen fertilizer, indicating that the phosphate fertilizer promotes root development and enhances the absorption of soil moisture. Use has a special role. The soil water content after fertilization was significantly lower than that of the unfertilized soil. The soil moisture content of phosphate fertilizer treatment was significantly lower than that of nitrogen fertilizer soil. After fertilization, the degree of soil water use by plants increased.
1. Please contact the corresponding product engineer for specific torque products.
2. Max. rotation speed: 50r/min
3. Max. circle rate: 6 cycle/min ( Clockwise360 °, 360 ° anti-clockwise for 1 cycle)
4. Operating temperature: -10~50℃
5. Storage temperature:-30~80℃
NO.
Description
Material
1
Shell
SPFC
2
Cover
SPFC
3
Shaft
PA/POM
Test Temperature: 23+/-5℃
Rotating speed: 20r/min
Durability test Metho: Clockwise 360 °, 360 °anti-clockwise
Rotating speed: 20r/min
Test Frequency: (1cycle/min)
Test Temperature: 23±5℃
Durability test cycle: 50000 cycle
Test result criteria: Store in the room temperature for 24 hours or more after the test, recording to the torque T=T±30%T.
Study on Variation of Soil Moisture in Wheat Field with Portable Soil Moisture Analyzer
The combination of atmospheric precipitation, crop evapotranspiration, and soil water movement creates a dynamic variation in soil moisture. It is necessary to describe the relationship between crop water yield and fertility and moisture. For this reason, it is very necessary and very meaningful to use the portable soil moisture measuring instrument to measure soil moisture.