Azimuth shaft system for photoelectric rotary table

Abstract

The invention belongs to the technical field of photoelectric monitoring, and particularly relates to an azimuth shaft system for a photoelectric rotary table, which comprises an azimuth seat body provided with an azimuth motor shaft, the azimuth motor shaft is provided with a first angular contact bearing, and the first angular contact bearing is matched with an azimuth bearing seat; a motor rotor arranged in the motor stator is fixedly mounted on the azimuth motor shaft above the first angular contact bearing; an azimuth spindle is fixedly mounted above the motor rotor, a second angular contact bearing is mounted on the azimuth spindle, and the second angular contact bearing is matched with the anti-overturning bearing seat; an oil seal arranged in an oil seal seat is mounted on the position main shaft above the second angular contact bearing; a labyrinth ring is mounted on the radial outer side of the oil seal seat; an orientation flange plate is installed above the oil seal seat and the labyrinth ring, and the position, close to the labyrinth ring, of the orientation flange plate is provided with a step structure. According to the azimuth shaft system, the stability and the severe environment resistance of the photoelectric azimuth shaft system are improved by optimizing a supporting mode and a sealing waterproof mode.

Description

Technical Field

[0001] The invention belongs to the technical field of photoelectric monitoring, and in particular relates to an azimuth axis system for a photoelectric turntable. Background Art

[0002] With the advancement and development of optoelectronic detection technology and equipment, optoelectronic turntables are playing an increasingly important role in national defense and civilian fields and are being used more and more widely.

[0003] The optoelectronic turntable includes a photoelectric sensor assembly, a pitch axis assembly and an azimuth axis assembly. Since the photoelectric sensor assembly and the pitch axis assembly have heavy loads and high centers of gravity, improper lifting during transportation or installation can easily cause damage to the bearings of the azimuth axis system and failure of the coordination between the motor stator and rotor, leading to equipment failure. At the same time, in order to prevent water when used in coastal or marine areas, the azimuth axis system often adopts a labyrinth seal, and the labyrinth groove thereof is prone to breed salt stains, which can cause the salt to stick to the labyrinth groove, causing the azimuth axis rotation to get stuck or fail. Summary of the invention

[0004] In order to improve the stability and harsh environment resistance of the azimuth axis system of the optoelectronic turntable, the present invention provides an azimuth axis system for the optoelectronic turntable. Through innovative design and rational use of structural forms, material properties and other technologies, the azimuth axis system support method is optimized and the sealing and waterproof form is optimized, thereby improving the stability and harsh environment resistance of the optoelectronic azimuth axis system, achieving stable rotation of the azimuth axis system of the optoelectronic turntable, and maximally improving the bearing support capacity within a limited height space. It has broad application prospects in the field of optoelectronic monitoring.

[0005] Specifically, the present invention provides the following technical solutions:

[0006] An azimuth axis system for an optoelectronic turntable comprises a hollow azimuth seat body, a vertical azimuth motor shaft is installed in the azimuth seat body, a first angular contact bearing is installed on the azimuth motor shaft, and the first angular contact bearing is matched with the azimuth bearing seat;

[0007] A motor rotor is fixedly mounted on the motor shaft above the first angular contact bearing, and the motor rotor is placed in the motor stator;

[0008] An azimuth main shaft is fixedly installed above the motor rotor, and the azimuth main shaft is coaxially arranged with the azimuth motor shaft; a second angular contact bearing is installed on the azimuth main shaft, and the second angular contact bearing is matched with an anti-overturning bearing seat;

[0009] An oil seal is installed on the azimuth main shaft above the second angular contact bearing, the oil seal is placed in an oil seal seat, a labyrinth ring is installed on the radial outer side of the oil seal seat, the circumference of the labyrinth ring has a stepped boss in the radial direction, and the raised height of the stepped boss gradually decreases from bottom to top in the axial direction;

[0010] An azimuth flange is installed above the oil seal seat and the labyrinth ring. The azimuth flange has a step structure adjacent to the labyrinth ring. The step structure and the step-shaped boss of the labyrinth ring form a step labyrinth.

[0011] Preferably, a slip ring shaft is fixedly installed in the azimuth motor shaft, and a slip ring is fixedly installed on the slip ring shaft;

[0012] An encoder shaft is fixedly mounted on the bottom end of the azimuth motor shaft, an absolute encoder rotor is fixedly mounted on the encoder shaft, the absolute encoder rotor is embedded in the absolute encoder stator, the absolute encoder stator is fixedly mounted on an encoder mounting seat, and the encoder mounting seat is fixedly mounted on the bottom end of the azimuth bearing seat.

[0013] Preferably, the motor stator is fixedly mounted on a motor seat, and the motor seat is fixedly mounted on the azimuth bearing seat.

[0014] Further preferably, there are two first angular contact bearings, an upper bearing outer ring of the first angular contact bearing is fixed by a motor seat, and a lower bearing inner ring is fixed by a pressure ring.

[0015] Preferably, the motor stator is a brushless torque motor stator; and the motor rotor is a brushless torque motor rotor.

[0016] Preferably, it also includes an azimuth bearing seat bottom plate, which is installed below the azimuth bearing seat, the azimuth bearing seat and the azimuth bearing seat bottom plate have a clearance fit, and the azimuth bearing seat bottom plate and the azimuth seat body have a clearance fit and are fixed by screws.

[0017] Preferably, the oil seal seat and the labyrinth ring are both fixedly mounted on the upper surface of the azimuth seat body.

[0018] Beneficial effects achieved by the present invention:

[0019] (1) The azimuth axis system for the optoelectronic turntable provided by the present invention proposes a new high-stability axis system support method, which adopts a first angular contact bearing and a second angular contact bearing in combination, and the brushless torque motor drive is located between the two bearings, which increases the bearing span while shortening the height. The first angular contact bearing can withstand axial force and radial force, and the second angular contact bearing improves its anti-overturning ability;

[0020] (2) The azimuth axis system for the optoelectronic turntable provided by the present invention proposes a new environmentally resistant rotating axis sealing method. The labyrinth ring uses a combined sealing form: an axial labyrinth, a radial labyrinth, and a contact seal are combined in a three-layer sealing form. The axial and radial labyrinths mainly prevent water such as waves and rainstorms from entering the azimuth seat. The contact seal is the last seal, which not only prevents wind and sand, but also prevents leaking rainwater.

[0021] (3) The azimuth axis system for the optoelectronic turntable provided by the present invention improves the stability and resistance to harsh environments of the optoelectronic turntable azimuth axis system, realizes the rotational stability of the optoelectronic turntable azimuth axis system, and improves the bearing support capacity to the greatest extent within a limited height space, and has broad application prospects in the field of optoelectronic monitoring. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the structure of the optoelectronic turntable; wherein, the optoelectronic sensor assembly 01, the pitch axis system 02, and the azimuth axis system 03.

[0023] Figure 2 It is a cross-sectional view of the azimuth axis system; among them, the azimuth seat body 1, the azimuth bearing seat bottom plate 2, the slip ring 3, the absolute encoder 4, the encoder mounting seat 5, the azimuth bearing seat 6, the angular contact bearing lower pressure ring 7, the encoder shaft 8, the azimuth motor shaft 9, the first angular contact bearing 10, the brushless torque motor seat 11, the brushless torque motor stator 12, the brushless torque motor rotor 13, the azimuth main shaft 14, the second angular contact bearing 15, the oil seal 16, the azimuth flange 17, the slip ring shaft 18, the angular contact bearing upper pressure ring 19, the anti-overturning bearing seat 20, the oil seal seat 21, and the labyrinth ring 22.

[0024] Figure 3 for Figure 2 A partial enlarged view of view A in the middle.

[0025] Figure 4 It is a schematic diagram of the structure of the azimuth seat in the azimuth axis system.

[0026] Figure 5 It is a schematic diagram of the structure of the azimuth bearing seat in the azimuth shaft system.

[0027] Figure 6 It is a schematic diagram of the structure of the maze circle in the azimuth axis system.

[0028] Figure 7 It is a cross-sectional view of the maze circle in the azimuth axis system. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. The following embodiments are used to illustrate the present invention but are not used to limit the scope of the present invention.

[0030] like Figure 1 As shown, the optoelectronic turntable provided in an embodiment of the present invention includes a photoelectric sensor assembly 01, a pitch axis system 02 and an azimuth axis system 03; the photoelectric sensor assembly 01 is installed on the pitch axis of the pitch axis system 02 and fixed by a flange, and the pitch axis system 02 is installed on the azimuth axis of the azimuth axis system 03 and fixed by a flange.

[0031] like Figure 2-Figure 7 As shown, the azimuth shaft system includes a hollow azimuth seat body 1, in which a vertical azimuth motor shaft 9 is installed, and the azimuth motor shaft 9 passes through a first angular contact bearing 10, and the shaft shoulder realizes axial positioning; the first angular contact bearing 10 cooperates with the azimuth bearing seat 6 and is installed in the bearing hole of the azimuth bearing seat 6;

[0032] A brushless torque motor rotor 13 is fixedly mounted on the surface of the azimuth motor shaft 9 above the first angular contact bearing 10 by screws, with coaxial clearance fit; the brushless torque motor rotor 13 is placed in the brushless torque motor stator 12;

[0033] An azimuth main shaft 14 is fixedly installed above the brushless torque motor rotor 13, with coaxial clearance fit; the azimuth main shaft 14 is coaxially arranged with the azimuth motor shaft 9; the second angular contact bearing 15 is installed in the anti-overturning bearing seat 20, with the outer ring fixed and the azimuth main shaft 14 installed on the inner ring, with coaxial floating installation;

[0034] An oil seal 16 is installed on the azimuth main shaft 14 above the second angular contact bearing 15, and the oil seal 16 is fixed on the oil seal seat 21, and is coaxially installed with interference fit; the oil seal seat 21 is fixed on the azimuth seat body 1, and is coaxially installed with clearance fit; a labyrinth ring 22 is installed on the radial outer side of the oil seal seat 21; the labyrinth ring 22 is fixed on the upper surface of the azimuth seat body 1, and is coaxially installed; the circumference of the labyrinth ring 22 has a stepped boss in the radial direction, and the raised height of the stepped boss gradually decreases from bottom to top in the axial direction;

[0035] An azimuth flange 17 is installed above the oil seal seat 21 and the labyrinth ring 22, and the azimuth flange 17 is coaxially fixed with the azimuth main shaft 14 with clearance fit; the azimuth flange 17 has a stepped structure adjacent to the labyrinth ring 22, and the stepped structure and the stepped boss of the labyrinth ring 22 form a stepped labyrinth.

[0036] A slip ring shaft 18 is fixedly installed inside the azimuth motor shaft 9, and the slip ring 3 is installed on the slip ring shaft 18 and fixed by screws.

[0037] The absolute encoder 4 includes an absolute encoder stator and an absolute encoder rotor embedded in the absolute encoder stator. The absolute encoder stator is coaxially mounted with the encoder mounting seat 5 and fixed by a flange. The encoder mounting seat 5 is fixedly mounted on the bottom end of the azimuth bearing seat 6; the absolute encoder rotor is coaxially mounted with the encoder shaft 8 and fixedly connected to the bottom end face of the encoder shaft 8. The encoder shaft 8 is fixedly mounted on the bottom end of the azimuth motor shaft 9.

[0038] The brushless torque motor stator 12 is fixedly mounted on the brushless torque motor seat 11 by screws, and the brushless torque motor seat 11 is fixedly mounted above the azimuth bearing seat 6 .

[0039] There are two first angular contact bearings 10 , wherein the upper surface of the outer ring of the upper bearing is fixed by a brushless torque motor seat 11 , and the lower surface of the inner ring of the lower bearing is fixed by an angular contact bearing lower pressing ring 7 .

[0040] The second angular contact bearing 15 is pressed by the angular contact bearing upper pressing ring 19, which is made of stainless steel and has a thickness of about 6 to 8 mm. The azimuth bearing seat bottom plate 2 is installed below the azimuth bearing seat 6, and the azimuth bearing seat 6 and the azimuth bearing seat bottom plate 2 are clearance-matched, and the azimuth bearing seat bottom plate 2 and the azimuth seat body 1 are clearance-matched and fixed by screws.

[0041] Although the present invention has been described in detail above by general description, specific implementation methods and experiments, it is obvious to those skilled in the art that some modifications or improvements can be made to the present invention. Therefore, these modifications or improvements made without departing from the spirit of the present invention all belong to the scope of protection claimed by the present invention.

Claims

1. An azimuth axis system for an optoelectronic turntable, characterized in that: It comprises a hollow azimuth seat body, a vertical azimuth motor shaft is installed in the azimuth seat body, a first angular contact bearing is installed on the azimuth motor shaft, and the first angular contact bearing matches with the azimuth bearing seat; a motor rotor is fixedly installed on the azimuth motor shaft above the first angular contact bearing, and the motor rotor is placed in the motor stator; an azimuth main shaft is fixedly installed above the motor rotor, and the azimuth main shaft is coaxially arranged with the azimuth motor shaft; a second angular contact bearing is installed on the azimuth main shaft, and the second angular contact bearing matches with the anti-overturning bearing seat; An oil seal is installed on the azimuth main shaft above the second angular contact bearing, the oil seal is placed in an oil seal seat, a labyrinth ring is installed on the radial outer side of the oil seal seat, the circumference of the labyrinth ring has a stepped boss in the radial direction, and the raised height of the stepped boss gradually decreases from bottom to top in the axial direction; An azimuth flange is installed above the oil seal seat and the labyrinth ring. The azimuth flange has a step structure adjacent to the labyrinth ring. The step structure and the step-shaped boss of the labyrinth ring form a step labyrinth.

2. The azimuth axis system for the optoelectronic turntable according to claim 1, characterized in that: A slip ring shaft is fixedly installed in the azimuth motor shaft, and a slip ring is fixedly installed on the slip ring shaft; An encoder shaft is fixedly mounted on the bottom end of the azimuth motor shaft, an absolute encoder rotor is fixedly mounted on the encoder shaft, the absolute encoder rotor is embedded in the absolute encoder stator, the absolute encoder stator is fixedly mounted on an encoder mounting seat, and the encoder mounting seat is fixedly mounted on the bottom end of the azimuth bearing seat.

3. The azimuth axis system for the optoelectronic turntable according to claim 1, characterized in that: The motor stator is fixedly mounted on the motor seat, and the motor seat is fixedly mounted on the azimuth bearing seat.

4. The azimuth axis system for the optoelectronic turntable according to claim 3, characterized in that: There are two first angular contact bearings, the upper bearing outer ring of the first angular contact bearing is fixed by a motor seat, and the lower bearing inner ring is fixed by a pressure ring.

5. The azimuth axis system for an optoelectronic turntable according to any one of claims 1 to 4, characterized in that: The motor stator is a brushless torque motor stator; the motor rotor is a brushless torque motor rotor.

6. The azimuth axis system for an optoelectronic turntable according to any one of claims 1 to 4, characterized in that: It also includes an azimuth bearing seat bottom plate, which is installed below the azimuth bearing seat. The azimuth bearing seat and the azimuth bearing seat bottom plate are clearance matched, and the azimuth bearing seat bottom plate and the azimuth seat body are clearance matched and fixed by screws.

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