Gyroscope air shielding cover capable of reducing external disturbance torque

Abstract

The invention belongs to the technical field of inertia, and particularly relates to a gyroscope air shielding cover capable of reducing external disturbance torque. The gas shielding cover of the gyroscope comprises a protective cylinder (3-1), a first fixing screw (3-2), a rubber anti-vibration pad (3-3), a mounting seat (3-4) and a second fixing screw (3-5), the rubber anti-vibration pad (3-3) is mounted between the gyroscope and the mounting seat (3-4) and is connected with the gyroscope and the mounting seat (3-4) through a second fixing screw (3-5), the mounting seat (3-4) is sleeved with the protection cylinder (3-1), and the protection cylinder (3-1) and the mounting seat (3-4) are fixed through a first fixing screw (3-2). After the gas shielding cover is installed, shielding protection of engine jet in the working environment of the gyroscope is realized, and the disturbance torque to the universal bracket of the gyroscope is reduced; the gas shielding cover can be used for mounting the universal bracket of the gyroscope on the centroid, the center and the rotation center of the gyroscope while realizing vibration reduction and buffering protection, so that the effect of integrating three centers into one is achieved, the working performance of the gyroscope can be better exerted, and the aim of accurately measuring the posture of a projectile body is fulfilled.

Description

Technical Field

[0001] The invention belongs to the field of inertial technology, and specifically relates to a gyroscope air shield capable of reducing external interference torque. The air shield can also reduce the external interference torque of the gyroscope and improve the vibration and impact resistance of the gyroscope in the Y-axis and Z-axis directions. Background Art

[0002] Gyroscope is a device that uses the principle of high-speed rotating body fixed axis, and the sensitive shell relative to the inertial space to detect the angular motion around one or two axes orthogonal to the rotation axis. Angular motion detection devices made by other principles and having the same function are also called gyroscopes.

[0003] The function of the pneumatic gyroscope is to make the inner and outer frames in the universal bracket relatively still in the inertial space based on the spatial axis fixation of the high-speed rotor, and use the angle sensor to output the mechanical angle change of the shell relative to the inner and outer frames as an electrical signal, so as to measure the attitude angle change of the missile body relative to the inertial space. For tactical tilt-stabilized missiles, the pneumatic gyroscope is the core sensor for accurately measuring its tilt, yaw, and pitch angles.

[0004] The working principle of the pneumatic gyroscope is that before the missile is launched, the gyroscope's electric ignition device is ignited, the propellant is ignited to generate combustion gas, which is ejected through the nozzle at high speed, blowing the crescent-shaped rotor to rotate at high speed. When the rotor speed reaches the required working speed, the gas in the generator is exhausted, and the nozzle withdraws from the inner and outer frames under the action of the spring, and the gyroscope is unlocked and is in working condition.

[0005] Pneumatic gyroscopes are Figure 1 The shell 1-1, universal bracket 1-2, sensor 1-3 and gas generator 1-4 are composed. The shell 1-1 plays a supporting role and can be installed on the projectile; the universal bracket 1-2 uses the fixed axis of the high-speed rotor to keep the inner and outer frames relatively still in the inertial space to produce a gyro effect; the sensor 1-3 is fixedly connected to the outer frame to convert the mechanical angle of the gyroscope into an electrical signal output; the gas generator 1-4 produces high-temperature and high-pressure gas, which is the power part that drives the rotor to rotate at high speed.

[0006] In order to make the gyroscope adapt to the missile launch and working environment and work properly, the gyroscope needs to be installed on the missile body through a shock absorber. The shock absorber is used to reduce the vibration and impact force transmitted to the gyroscope from the external environment, so that the working performance of the gyroscope is not affected by the external environment. It is a key component to ensure the normal operation of the gyroscope.

[0007] The structure of pneumatic gyro shock absorber is as follows: Figure 2As shown. The shock absorber consists of three parts: a rubber shock absorber pad 2-1, a mounting seat 2-2 and a fixing screw 2-3. The rubber shock absorber pad 2-1 is installed at the bottom of the gyro gas generator 1-4 and matches the shape of the bottom of the generator; one end of the mounting seat 2-2 is connected to the missile compartment, and the other end is connected to the gyro and the rubber shock absorber pad 2-1 through two fixing screws 2-3.

[0008] In the use environment of a certain type of missile, the gyroscope is installed at the rear of the flight engine, resulting in poor performance of the gyroscope and large measurement errors. After analysis, the main reasons for this consequence are: first, the engine airflow continuously acts on the gyroscope, causing a large interference torque on the gyroscope, causing the gyroscope to precess and a large measurement error; second, the damper is installed at the bottom of the gyroscope, forming a cantilever beam structure, causing the gyroscope's center of mass to be disturbed too much, affecting the measurement accuracy.

[0009] Axis stability is the basis for the operation of a gyroscope. A high-speed rotating rotor has axis stability, which can keep its inner and outer frames stationary in the inertial space. The angle change of the shell relative to the inner and outer frames is the attitude angle of the missile. When an external torque acts on the inner and outer frames, the gyroscope will precess, causing the inner and outer frames to move, resulting in increased measurement errors. Since the gyroscope is exposed at the rear of the engine, the airflow of the engine continuously acts on the inner and outer frames of the gyroscope, which will produce a continuous interference torque on the inner and outer frames, causing the gyroscope to continue to precess, resulting in large measurement errors.

[0010] Universal bracket 1-2 is the core component of the pneumatic mechanical gyroscope, which is used to generate the deflection angle of the missile body relative to the inertial space. The center of universal bracket 1-2 is located at the centroid, center of gravity and center of rotation of the gyroscope, which is a design point to ensure the normal operation of the gyroscope. The traditional shock absorber is installed at the bottom of the gyroscope. When the gyroscope is working, it is equivalent to the universal bracket 1-2 being in a cantilever beam state. It cannot ensure that the center of universal bracket 1-2 is in the three-center-in-one position of the gyroscope, resulting in excessive swing amplitude of universal bracket 1-2 when the gyroscope is subjected to strong impact, resulting in excessive zero position instantaneous drift.

[0011] Therefore, designing a gyroscope air shield that can not only have the function of installing the gyroscope in the middle, but also shield the influence of the engine jet airflow can solve the problem that the gyroscope is greatly affected by the external environment from the root of the design, and fundamentally improve the environmental adaptability and working reliability of the gyroscope. Summary of the invention

[0012] 1. Technical issues to be resolved

[0013] The technical problems to be solved by the present invention are: how to physically shield the disturbance torque effect of the engine jet gas on the gyroscope universal bracket, reduce the precession torque of the universal bracket, and ensure measurement accuracy; how to ensure that the gyroscope universal bracket is at the three-center-in-one position of the gyroscope's centroid, center of gravity and center of rotation.

[0014] (II) Technical solution

[0015] In order to solve the above technical problems, the present invention provides a gyroscope air shield capable of reducing external interference torque, the gyroscope air shield comprising: a protective tube (3-1), a first fixing screw (3-2), a rubber vibration damping pad (3-3), a mounting seat (3-4) and a second fixing screw (3-5);

[0016] The rubber vibration-damping pad (3-3) is installed between the gyroscope and the mounting seat (3-4), and is connected via a second fixing screw (3-5); the protective tube (3-1) is sleeved on the mounting seat (3-4), and the two are fixed via a first fixing screw (3-2).

[0017] The protective tube (3-1) is a square hollow structure and is used to be non-contactly sleeved on the periphery of the gyroscope; the opening of the protective tube (3-1) and the mounting seat (3-4) are connected via a first fixing screw (3-2), and the protective tube (3-1) and the gyroscope are non-contact.

[0018] A long strip-shaped fine-tuning groove is provided on the side surface of the protective tube (3-1), so as to facilitate the adjustment of the relative position between the protective tube (3-1) and the mounting seat (3-4).

[0019] The rubber vibration damping pad (3-3) is provided with an inner hole in the middle for being sleeved on the gyro gas generator; the rubber vibration damping pad (3-3) is also provided with two through holes for facilitating the installation of the second fixing screw (3-5); the rubber width at the edge of the rubber vibration damping pad (3-3) is not less than 1.5 mm to ensure a certain structural strength.

[0020] The mounting seat (3-4) is provided with a through hole for fixing the gyro gas generator; the mounting seat (3-4) is also provided with a threaded hole for fixing the protective tube (3-1); the mounting seat (3-4) is provided with a shallow groove having the same shape as the rubber vibration damping pad (3-3), the depth of which is 2 / 3 of the thickness of the rubber vibration damping pad (3-3), thereby ensuring that the compression amount of the rubber during assembly is 1 / 3.

[0021] The rubber vibration damping pad (3-3) is placed between the mounting seat (3-4) and the boss in the middle of the gyroscope housing, and is concentric with the boss.

[0022] The mounting seat (3-4) is connected to the rubber vibration-damping pad (3-3) and the central boss of the gyroscope housing via two second fixing screws (3-5); after installation, the design can ensure that the compression amount of the rubber vibration-damping pad (3-3) 2 is 1 / 3, ensuring that the rubber material is in a good working condition.

[0023] The protective tube (3-1) is inserted from the upper part of the gyroscope, and attention is paid to the direction of the coordinate system on the protective tube; the fixing of the protective tube (3-1) and the mounting seat (3-4) is completed by two first fixing screws (3-2).

[0024] The mutual position fine-tuning of the protective tube (3-1) and the mounting seat (3-4) can be achieved through the fine-tuning groove on the protective tube.

[0025] When the air shield is installed, it achieves shielding protection against the engine jet in the gyroscope's working environment and reduces the disturbance torque on the gyroscope's gimbal bracket. While achieving vibration reduction and buffering protection, the air shield can also install the gyroscope's gimbal bracket at the gyroscope's centroid, center and rotation center, achieving the effect of "three centers in one", which can better exert the gyroscope's working performance and achieve the purpose of accurately measuring the projectile's attitude.

[0026] (III) Beneficial effects

[0027] Compared with the prior art, the present invention proposes a gyroscope air shield that has both external airflow shielding and shock absorption and buffering functions. The air shield can physically shield the disturbing torque of the engine jet gas on the gyroscope universal bracket, reduce the precession torque of the universal bracket, and ensure measurement accuracy; the air shield can also realize the middle installation of the gyroscope, ensuring that the gyroscope universal bracket is at the position where the gyroscope's centroid, center of gravity, and center of rotation are combined.

[0028] The gyroscope air shield can improve the environmental adaptability and reliability of the gyroscope and ensure its normal operation in a certain type of missile. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 Schematic diagram of the structure of a pneumatic gyroscope.

[0030] Figure 2 This is a schematic diagram of the installation of a pneumatic gyroscope.

[0031] Figure 3 Schematic diagram of the gas hood structure.

[0032] In the figure, 1-1: housing; 1-2: universal bracket; 1-3: sensor; 1-4: gas generator; 2-1: rubber vibration damping pad; 2-2: mounting seat; 2-3: fixing screw; 3-1: protective tube; 3-2: first fixing screw; 3-3: rubber vibration damping pad; 3-4: mounting seat; 3-5: second fixing screw. DETAILED DESCRIPTION

[0033] In order to make the purpose, content, and advantages of the present invention more clear, the specific implementation methods of the present invention are further described in detail below in conjunction with the accompanying drawings and examples.

[0034] In order to solve the above technical problems, the present invention provides a gyroscope air shield capable of reducing external interference torque, the gyroscope air shield comprising: a protective tube (3-1), a first fixing screw (3-2), a rubber vibration damping pad (3-3), a mounting seat (3-4) and a second fixing screw (3-5);

[0035] The rubber vibration-damping pad (3-3) is installed between the gyroscope and the mounting seat (3-4), and is connected via a second fixing screw (3-5); the protective tube (3-1) is sleeved on the mounting seat (3-4), and the two are fixed via a first fixing screw (3-2).

[0036] The protective tube (3-1) is a square hollow structure and is used to be non-contactly sleeved on the periphery of the gyroscope; the opening of the protective tube (3-1) and the mounting seat (3-4) are connected via a first fixing screw (3-2), and the protective tube (3-1) and the gyroscope are non-contact.

[0037] A long strip-shaped fine-tuning groove is provided on the side surface of the protective tube (3-1), so as to facilitate the adjustment of the relative position between the protective tube (3-1) and the mounting seat (3-4).

[0038] The rubber vibration damping pad (3-3) is provided with an inner hole in the middle for being sleeved on the gyro gas generator; the rubber vibration damping pad (3-3) is also provided with two through holes for facilitating the installation of the second fixing screw (3-5); the rubber width at the edge of the rubber vibration damping pad (3-3) is not less than 1.5 mm to ensure a certain structural strength.

[0039] The mounting seat (3-4) is provided with a through hole for fixing the gyro gas generator; the mounting seat (3-4) is also provided with a threaded hole for fixing the protective tube (3-1); the mounting seat (3-4) is provided with a shallow groove having the same shape as the rubber vibration damping pad (3-3), the depth of which is 2 / 3 of the thickness of the rubber vibration damping pad (3-3), thereby ensuring that the compression amount of the rubber during assembly is 1 / 3.

[0040] The rubber vibration damping pad (3-3) is placed between the mounting seat (3-4) and the boss in the middle of the gyroscope housing, and is concentric with the boss.

[0041] The mounting seat (3-4) is connected to the rubber vibration-damping pad (3-3) and the central boss of the gyroscope housing via two second fixing screws (3-5); after installation, the design can ensure that the compression amount of the rubber vibration-damping pad (3-3) 2 is 1 / 3, ensuring that the rubber material is in a good working condition.

[0042] The protective tube (3-1) is inserted from the upper part of the gyroscope, and attention is paid to the direction of the coordinate system on the protective tube; the fixing of the protective tube (3-1) and the mounting seat (3-4) is completed by two first fixing screws (3-2).

[0043] The mutual position fine-tuning of the protective tube (3-1) and the mounting seat (3-4) can be achieved through the fine-tuning groove on the protective tube.

[0044] When the air shield is installed, it achieves shielding protection against the engine jet in the gyroscope's working environment and reduces the disturbance torque on the gyroscope's gimbal bracket. While achieving vibration reduction and buffering protection, the air shield can also install the gyroscope's gimbal bracket at the gyroscope's centroid, center and rotation center, achieving the effect of "three centers in one", which can better exert the gyroscope's working performance and achieve the purpose of accurately measuring the projectile's attitude.

[0045] Example 1

[0046] This embodiment: Figure 3 As shown, the air shielding cover is composed of a protective tube (3-1), a first fixing screw (3-2), a rubber vibration-damping pad (3-3), a mounting seat (3-4) and a second fixing screw (3-5).

[0047] The rubber vibration damping pad (3-3) is placed between the mounting seat (3-4) and the middle boss of the gyroscope housing, and is concentric with the boss; the mounting seat (3-4) is connected to the boss of the gyroscope housing through two 3-5 mounting screws. After installation, the design can ensure that the compression amount of the rubber vibration damping pad (3-3) 2 is 1 / 3, ensuring that the rubber material is in a good working state; the protective tube (3-1) is inserted from the upper part of the gyroscope, and pay attention to the direction of the coordinate system on the protective tube; the fixing of the protective tube (3-1) and the mounting seat (3-4) is completed by two first fixing screws (3-2). The mutual position fine-tuning of the protective tube (3-1) and the mounting seat (3-4) can be completed through the fine-tuning groove on the protective tube.

[0048] When the air shield is installed, it achieves shielding protection against the engine jet in the gyroscope's working environment and reduces the disturbance torque on the gyroscope's gimbal bracket. While achieving vibration reduction and buffering protection, the air shield can also install the gyroscope's gimbal bracket at the gyroscope's centroid, center and rotation center, achieving the effect of "three centers in one", which can better exert the gyroscope's working performance and achieve the purpose of accurately measuring the projectile's attitude.

[0049] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A gyroscope air shield capable of reducing external disturbance torque, characterized in that: The gyroscope air shield comprises: a protective tube (3-1), a first fixing screw (3-2), a rubber vibration-damping pad (3-3), a mounting seat (3-4) and a second fixing screw (3-5); The rubber vibration-damping pad (3-3) is installed between the gyroscope and the mounting seat (3-4), and is connected via a second fixing screw (3-5); the protective tube (3-1) is sleeved on the mounting seat (3-4), and the two are fixed via a first fixing screw (3-2).

2. The gyroscope gas shield capable of reducing external disturbance torque as claimed in claim 1, characterized in that: The protective tube (3-1) is a square hollow structure and is used to be non-contactly sleeved on the periphery of the gyroscope; the opening of the protective tube (3-1) and the mounting seat (3-4) are connected via a first fixing screw (3-2), and the protective tube (3-1) and the gyroscope are non-contact.

3. The gyroscope gas shield capable of reducing external disturbance torque as claimed in claim 1, characterized in that: A long strip-shaped fine-tuning groove is provided on the side surface of the protective tube (3-1), so as to facilitate the adjustment of the relative position between the protective tube (3-1) and the mounting seat (3-4).

4. The gyroscope gas shield capable of reducing external interference torque as claimed in claim 3, characterized in that: The rubber vibration damping pad (3-3) is provided with an inner hole in the middle for being sleeved on the gyro gas generator; the rubber vibration damping pad (3-3) is also provided with two through holes for facilitating the installation of the second fixing screw (3-5); the rubber width at the edge of the rubber vibration damping pad (3-3) is not less than 1.5 mm to ensure a certain structural strength.

5. The gyroscope gas shield capable of reducing external disturbance torque as claimed in claim 4, characterized in that: The mounting seat (3-4) is provided with a through hole for fixing the gyro gas generator; the mounting seat (3-4) is also provided with a threaded hole for fixing the protective tube (3-1); the mounting seat (3-4) is provided with a shallow groove having the same shape as the rubber vibration damping pad (3-3), the depth of which is 2 / 3 of the thickness of the rubber vibration damping pad (3-3), thereby ensuring that the compression amount of the rubber during assembly is 1 / 3.

6. The gyroscope gas shield capable of reducing external disturbance torque as claimed in claim 5, characterized in that: The rubber vibration-damping pad (3-3) is placed between the mounting seat (3-4) and the boss in the middle of the gyroscope housing, and is concentric with the boss.

7. The gyroscope gas shield capable of reducing external disturbance torque as claimed in claim 6, characterized in that: The mounting seat (3-4) is connected to the rubber vibration-damping pad (3-3) and the central boss of the gyroscope housing via two second fixing screws (3-5); after installation, the design can ensure that the compression amount of the rubber vibration-damping pad (3-3) 2 is 1 / 3, ensuring that the rubber material is in a good working condition.

8. The gyroscope gas shield capable of reducing external disturbance torque as claimed in claim 7, characterized in that: The protective tube (3-1) is inserted from the upper part of the gyroscope, and attention is paid to the direction of the coordinate system on the protective tube; the fixing of the protective tube (3-1) and the mounting seat (3-4) is completed by two first fixing screws (3-2).

9. The gyroscope gas shield capable of reducing external disturbance torque as claimed in claim 8, characterized in that: The mutual position fine-tuning of the protective tube (3-1) and the mounting seat (3-4) can be achieved through the fine-tuning groove on the protective tube.

10. The gyroscope gas shield capable of reducing external disturbance torque as claimed in claim 9, characterized in that: When the air shield is installed, it can shield the engine jet in the gyroscope's working environment and reduce the disturbance torque on the gyroscope's gimbal. While achieving vibration reduction and buffering protection, the air shield can also install the gyroscope's gimbal at the gyroscope's centroid, center and rotation center, achieving the effect of "three centers in one", which can better exert the gyroscope's working performance and achieve the purpose of accurately measuring the projectile's attitude.

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