Double-chip differential pressure core
A double-chip, pressure core technology, applied in the direction of measuring fluid pressure, pressure difference measurement between multiple valves, measuring devices, etc., can solve problems such as core body damage, improve accuracy, avoid damage, and avoid differential pressure The effect of core damage
Inactive Publication Date: 2019-06-11
NANJING WOTIAN TECH
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Problems solved by technology
[0003] Aiming at the above-mentioned shortcomings existing in the prior art, the present invention aims to propose a double-chip differential pressure core body, which only bears force on the front side during operation, effectively avoiding sudden changes in the pressure on the back side of the chip (even when only the back side is stressed). force), the chip is under too much pressure, causing damage to the core
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[0015] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention.
[0016] refer to figure 1 , a two-chip differential pressure core, including a chip (1), a sintered base (2), a pressure ring (3), a diaphragm (4), a ceramic pad (5), an O-ring (6), a glass insulator ( 7), the sintering base (2) is provided with an oil filling hole (8), the filling oil (9) can be poured into the cavity of the core body through the oil filling hole (8), and the oil filling hole (8) passes through The steel ball (11) is sealed, the chip (1) is bonded on the sintered base (2) by the chip glue (10), and the pressure ring (3) and the diaphragm (4) are connected on the sintered base (2) by argon arc welding. On the base (2), the chip (1), pressure ring (3)...
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The invention discloses a double-chip differential pressure core, and belongs to the technical field of sensitive components. The double-chip differential pressure core comprises two groups of chips,a sintered base, two groups of pressurerings, two groups of membranes, two groups of ceramic pads, two groups of O-shaped rings, and two groups of glass insulators, two groups of oil filling holes areformed in the sintered base, filling oil can be injected into a cavity of the core through the oil filling holes, the chips are fixed to the sintered base, the pressurerings and the membranes are connected to the sintered base in a welded mode, and the chips, the pressurerings, the membranes, the ceramic pads, the O-shaped rings, the glass insulators, and the oil filling holes are symmetrically distributed on the sintered base up and down. Compared with a single-chip differential pressure core, the double-chip differential pressure core solves the following technical problems that (1) the installation direction of the chips does not need to be fixed, a packaging process of the differential pressure core is simple, and the differential pressure core is prevented from being damaged due to installation errors; and (2) it is ensured that only the front faces of the chips stress during use of the chips in the range of the chips, the chips are prevented from being damaged due to the suddenchange of the pressure on the reverse faces of the chips, and the precision of the differential pressure core is improved.
Description
technical field [0001] The invention relates to the technical field of sensitive components, in particular to a double-chip differential pressure core. Background technique [0002] Differential Pressure Sensor DPS (Differential Pressure Sensor) is a core used to measure the difference between two pressures, usually used to measure the pressure difference between the front and back ends of a device or component. At present, the differential pressure core is mainly a single-chip differential pressure core. When the chip is working, both the front and the back are under pressure. When the pressure on the back of the chip changes suddenly (even when only the back is stressed), the pressure on the chip is too large. cause damage to the core. The present invention provides a two-chip differential pressure core body, which only bears force on the front side during work, effectively solves the above problems, and eliminates the influence of the chip itself when the force is on bot...
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IPC IPC(8): G01L13/02
Inventor 高峰熊峰
Owner NANJING WOTIAN TECH