一种陀螺仪气压稳压机构

Abstract

本实用新型公开了陀螺仪领域的一种陀螺仪气压稳压机构，包括陀螺仪芯片、外壳以及稳压组件，芯片固定于外壳内的密闭空间，外壳上设有注气口和泄压口；稳压组件包括设置于注气口内的第一单向通气件、设置于泄压口内的第二单向通气件以及设于泄压口外侧用于调节第二单向通气件开度并可密封该口的节流装置；注气口、密闭空间与泄压口连通形成惰性气体流通路径，且第二单向通气件的额定流量小于第一单向通气件的额定流量。本实用新型通过在充入干燥惰性气体时，密闭空间内能形成并维持微正压，有效置换并隔离湿空气，从根本上防止内部结露，同时实现了充气过程与装配工艺的解耦，简化了操作。

Claims

1. A gyrobaric pressure regulating mechanism, characterized by comprising: include: Gyroscope chip; The outer casing (1) has the gyroscope chip fixed in a sealed space (1e) inside the outer casing (1). The outer casing (1) is provided with an air injection port (1b21) and a pressure relief port (1b14). The pressure stabilizing component includes a first one-way vent (2), a second one-way vent (3), and a throttling device for adjusting the opening of the second one-way vent (3). The first one-way vent (2) is disposed in the air injection port (1b21), the second one-way vent (3) is disposed in the pressure relief port (1b14), and the throttling device is disposed outside the pressure relief port (1b14) and is capable of sealing the pressure relief port (1b14). The gas injection port (1b21), the sealed space (1e), and the pressure relief port (1b14) are connected to form an inert gas flow path; The rated flow rate of the second one-way vent (3) is less than the rated flow rate of the first one-way vent (2) so as to maintain a slightly positive pressure environment in the sealed space (1e).

2. The gyrobaric pressure regulating mechanism according to claim 1, wherein The first one-way ventilation component (2) and the second one-way ventilation component (3) have the same structure and are both made of silicone. They both include an annular support part (2a) and a tapered tube (2b) connected thereto. One end of the tapered tube (2b) is a large-diameter end connected to the annular support (2a), and the other end is a small-diameter end of a flat exhaust slit (2b1). The tapered tube (2b) of the first one-way vent (2) faces the inside of the outer shell (1), and the tapered tube (2b) of the second one-way vent (3) faces the outside of the outer shell (1).

3. The gyrobaric pressure regulating mechanism according to claim 2, wherein The outer shell (1) is provided with a first hollow cylindrical part (1b1) that extends outward and is coaxial with the pressure relief port (1b14), and the outer periphery of the first hollow cylindrical part (1b1) is provided with a first external thread (1b15). The throttling device includes a first cap (4) that is screwed onto the first external thread (1b15), and the inner top surface of the first cap (4) is provided with a first sealing ring (4a) for abutting against the end face of the first hollow cylindrical part (1b1). The first rotating cap (4) has several vent holes (4b) circumferentially arranged on the side wall, and the vent holes (4b) are offset from the first sealing ring (4a) in the axial direction.

4. The gyrobaric pressure regulating mechanism according to claim 3, wherein The inner side of the outer port of the first hollow cylindrical part (1b1) is provided with a radially inward protruding support part (1b11) for supporting the tapered tube (2b) of the second one-way ventilation part (3); In the projection of the outer end face of the first hollow cylindrical part (1b1), the inner edge of the backing part (1b11) is a chord line (1b13) that avoids the center of the circle. The backing part (1b11) has a clamping plane (1b12) facing the axial direction, which is perpendicular to the plane where the chord line (1b13) is located. The first rotating cap (4) is provided with a circular base plate (5) that can be rotated independently. The circular base plate (5) has a wedge block (5a) protruding on the side facing the first hollow cylindrical part (1b1). The wedge portion (5a) has an inclined pressing surface (5b) near the axis, the inclined pressing surface (5b) forms a preset angle with the axis of the first hollow cylindrical portion (1b1), and the outer periphery of the wedge portion (5a) is a cylindrical surface (5c) that slides with the inner wall of the first hollow cylindrical portion (1b1). When the first screw cap (4) is tightened, the circular base plate (5) drives the wedge block (5a) to extend inward into the first hollow cylindrical part (1b1) under axial thrust. The radial distance between the inclined pressing surface (5b) and the clamping plane (1b12) is reduced, thereby squeezing and adjusting the opening of the flat exhaust slit (2b1) of the second one-way ventilation part (3).

5. The gyrobaric pressure regulating mechanism according to claim 1, wherein The outer shell (1) is provided with a second hollow cylindrical part (1b2) extending outward from the air inlet (1b21). The outer wall of the second hollow cylindrical part (1b2) is provided with a second external thread (1b22), and its end is screwed with a second cap (6) with a second sealing ring (6a).

6. The gyrobaric pressure regulating mechanism according to claim 5, wherein The inner top surface of the second cap (6) is provided with a second sealing ring (6a) for abutting against the end face of the second hollow cylindrical part (1b2).

7. The gyrobaric pressure regulating mechanism according to claim 2, wherein The inner walls of the air injection port (1b21) and the pressure relief port (1b14) are provided with two axially spaced annular flanges (1c), and the annular support (2a) is embedded between the two annular flanges (1c).

8. The gyrobaric pressure regulating mechanism according to claim 1, wherein The outer shell (1) is composed of a shell (1a) and a side cover (1b), and the inner wall of the open end of the shell (1a) is provided with a third sealing ring (1d). The inner edge of the third sealing ring (1d) extends to form an outwardly inclined flexible lip (1d1), which is configured to adhere to the inner wall of the side cover (1b) under the micro-positive pressure environment.

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