A silicon carbide mechanical sealing device for radar hinge

Abstract

The invention discloses a silicon carbide mechanical sealing device for a radar hinge, comprising a moving ring (2), a moving ring seat (3), a spring seat (4), a plurality of springs (5), etc., which are sleeved on a rotating shell (1); a first circumferential limiting structure is provided on one end of the moving ring seat (3) and a step surface of the spring seat (4); a second circumferential limiting structure is provided on the step inner wall of the moving ring seat (3); a third circumferential limiting structure is provided on one end of a stationary ring (8) and the step inner wall of the stationary ring seat (7); the sealing device is convenient for installation, has an axial pre-compression anti-dropping structure for the moving ring seat; a dynamic and static ring double-channel sealing ring reinforced seal; the anti-seismic buffering performance of the dynamic and static rings is increased, and the sealing leakage problem caused by the breakage of the dynamic and static rings due to radar vibration, especially the large-amplitude vibration of armored vehicle radar caused by complex ground, is eliminated, and the sealing device can be guaranteed to have a high-performance and long-life sealing effect.

Description

Technical field:

[0001] The invention relates to the technical field of mechanical seals, and in particular to a silicon carbide mechanical seal device for a radar hinge. Background technology:

[0002] At present, there is a silicon carbide mechanical seal device, which includes a spring seat sleeved on the shaft, a dynamic ring seat linked with the spring seat, a sealing static ring, a sealing dynamic ring, a spring and a gasket. The sealing dynamic ring is tightly sealed with the dynamic ring seat, and the sealing dynamic ring is tightly attached to the sealing static ring. The spring seat rotates synchronously with the shaft, and a fork device for driving the dynamic ring seat is provided between the spring seat and the dynamic ring seat. The synchronous rotation of the spring seat and the shaft means that the spring seat and the shaft are sealed by a set screw. The fork device means that a fork is provided on the spring seat, and a groove for the fork to be embedded is provided on the dynamic ring seat. The silicon carbide mechanical seal device of the above structure has the following disadvantages: 1. The dynamic ring and the dynamic ring seat are sealed by interference fit, lacking an effective sealing structure, resulting in poor sealing effect; 2. The end face of the dynamic ring is in hard contact with the step end face of the dynamic ring seat, and the anti-seismic performance is weak, which can easily cause the dynamic ring to break and cause sealing leakage; 3. There is no axial limit device between the dynamic ring seat and the spring seat. The dynamic ring seat is easy to fall off during installation, especially vertical installation, which is inconvenient to install. Summary of the invention:

[0003] The technical problem to be solved by the present invention is to provide an axial pre-stressed anti-drop structure of a dynamic ring seat that is easy to install; a dynamic and static ring double-channel sealing ring reinforced seal; increase the anti-seismic buffering performance of the dynamic and static rings, eliminate the sealing leakage problem caused by the breakage of the dynamic and static rings due to radar vibration, especially the large-scale vibration caused by complex ground of the radar used in armored vehicles, and ensure that the sealing device has a high-performance and long-life sealing effect of the silicon carbide mechanical sealing device for radar hinges

[0004] In order to solve the above technical problems, the present invention adopts a silicon carbide mechanical sealing device for radar hinges using the following technical solutions, including a dynamic ring, a dynamic ring seat, a spring seat, a plurality of springs, which are sleeved on a rotating shell, and a static ring seat and a static ring which are connected to a stationary shell and sleeved outside the rotating shell; the dynamic ring is tightly attached to the static ring under the action of the spring to form a sealing surface; the outer wall of the static ring seat is sealed with the stationary shell, the inner wall of the spring seat is sealed with the outer wall of the rotating shell, and the outer wall of the spring seat located inside the dynamic ring seat is sealed with the inner wall of the dynamic ring seat; one end of the dynamic ring seat is movably embedded in the stepped outer wall of the spring seat, and a step is provided on the step surface between one end of the dynamic ring seat and the spring seat A first circumferential limiting structure; one end of the dynamic ring is movably embedded in the stepped inner wall of the dynamic ring seat, and one end of the dynamic ring and the stepped inner wall of the dynamic ring seat are provided with a second circumferential limiting structure; one end of the static ring is movably embedded in the stepped inner wall of the static ring seat, and one end of the static ring and the stepped inner wall of the static ring seat are provided with a third circumferential limiting structure; the first circumferential limiting structure, the second circumferential limiting structure and the third circumferential limiting structure all adopt the same limiting structure, which is provided on two adjacent parts, and an axial sliding gap is provided between the dynamic ring seat and the spring seat; one end of the spring is embedded in the first mounting hole on the stepped surface of the spring seat, and the other end is against an end surface of one end of the dynamic ring seat;

[0005] The first circumferential limiting structure includes a plurality of axial pull screws evenly distributed along the circumference, one end of the axial pull screw is movably embedded in the second mounting hole on the step surface of the spring seat, and the other end is embedded in the third mounting hole on one end surface of the dynamic ring seat.

[0006] The springs and the shaft pulling screws are evenly spaced and distributed along the circumference.

[0007] The second circumferential limiting structure includes a plurality of first platforms evenly distributed along the circumference of the outer wall of one end of the moving ring and a second platform evenly distributed along the inner wall of the step of the moving ring seat.

[0008] The third circumferential limiting structure includes a plurality of third platforms evenly distributed along the circumference of the outer wall of one end of the stationary ring and a fourth platform evenly distributed along the inner wall of the step of the stationary ring seat.

[0009] The axial sliding gap between the moving ring seat and the spring seat means that a distance is provided between the step of the axial pull screw and the inner bottom surface of the second mounting hole of the spring seat.

[0010] The second mounting hole of the spring seat is a countersunk hole, and the step of the axial pull screw is axially limited with the second mounting hole of the spring seat.

[0011] The inner wall of the inner end of the dynamic ring seat is provided with a first annular groove, and the end surface of the inner end is provided with a second annular groove, a second sealing ring is provided in the first annular groove, and a third sealing ring is provided in the second annular groove; a gap is provided between the outer wall of the dynamic ring and the inner wall of the dynamic ring seat, and the second sealing ring and the third sealing ring are tightly sealed with the dynamic ring and the dynamic ring seat.

[0012] The inner wall of the inner end of the stationary ring seat is provided with a third annular groove, the end surface of the inner end is provided with a fourth annular groove, a fourth sealing ring is provided in the third annular groove, and a fifth sealing ring is provided in the fourth annular groove; a gap is provided between the outer wall of the stationary ring and the inner wall of the stationary ring seat, and the fourth sealing ring and the fifth sealing ring are tightly sealed with the stationary ring and the stationary ring seat.

[0013] After adopting the above structure, the present invention has the following advantages and beneficial effects compared with the prior art:

[0014] 1. The second mounting hole of the spring seat is a countersunk hole, and the step of the axial pull screw and the second mounting hole of the spring seat are axially limited to ensure that the ring seat of the mechanical seal device will not fall off during installation, which is convenient for installation.

[0015] 2. The second sealing ring, the third sealing ring, the fourth sealing ring and the fifth sealing ring respectively arranged on the dynamic and static rings can respectively play the role of double-channel sealing ring reinforced sealing effect.

[0016] 3. The third sealing ring and the fifth sealing ring respectively set on the dynamic and static rings can respectively play an anti-vibration buffer effect, eliminating the sealing leakage problem caused by the breakage of the dynamic and static rings due to radar vibration, especially the large-scale vibration caused by complex ground for armored vehicle radar, thereby ensuring that the sealing device has high performance and long-life sealing effect.

[0017] 4. The first circumferential limit, the second circumferential limit and the third circumferential limit have a simple structure, are easy to process, have good reliability, and can provide a strong limiting force. Description of the drawings:

[0018] Figure 1 The figure is a schematic cross-sectional structure diagram of a silicon carbide mechanical sealing device for a radar hinge according to the present invention.

[0019] Figure 2 It is a structural schematic diagram of the dynamic ring of the present invention.

[0020] Figure 3 It is a schematic diagram of the cross-sectional structure of the dynamic ring of the present invention.

[0021] Figure 4 It is a structural schematic diagram of the dynamic ring seat of the present invention.

[0022] Figure 5 It is a schematic diagram of the cross-sectional structure of the dynamic ring seat of the present invention.

[0023] Figure 6 It is a structural schematic diagram of the stationary ring of the present invention.

[0024] Figure 7 It is a schematic diagram of the cross-sectional structure of the stationary ring of the present invention.

[0025] Figure 8 It is a structural schematic diagram of the stationary ring seat of the present invention.

[0026] Fig. 9 It is a schematic diagram of the cross-sectional structure of the stationary ring seat of the present invention.

[0027] As shown in the figure:

[0028] 1. Rotating housing; 2. Moving ring; 2.1. First platform; 3. Moving ring seat; 3.1. First annular groove; 3.2. Second annular groove; 3.3. Second platform; 4. Spring seat; 5. Spring; 6. Stationary housing; 7. Stationary ring seat; 7.1. Third annular groove; 7.2 Fourth annular groove; 7.3 Fourth platform; 8. Stationary ring; 8.1. Third platform; 9. Shaft pull screw; 10. First sealing ring; 11. Second sealing ring; 12. Third sealing ring; 13. Fourth sealing ring; 14. Fifth sealing ring Specific implementation method:

[0029] The present invention is further described in detail below through specific examples, but the present invention is not limited to the following examples.

[0030] like Figure 1-9 As shown, a silicon carbide mechanical sealing device for a radar hinge of the present invention comprises a dynamic ring 2, a dynamic ring seat 3, a spring seat 4, a plurality of springs 5, which are sleeved on a rotating shell 1, and a static ring seat 7 and a static ring 8 which are connected to a static shell 6 and sleeved outside the rotating shell 1; the dynamic ring 2 is tightly attached to the static ring 8 by the action of the spring 5 to form a sealing surface; when working, the dynamic ring 2, the spring seat 4 and the rotating shell 1 rotate synchronously, while the static ring 8 does not rotate circumferentially, and the end face of the rotating dynamic ring 2 abuts against the end face of the static static ring 8 to form a seal.

[0031] The outer wall of the stationary ring seat 7 is sealed with the stationary housing 6 , the inner wall of the spring seat 4 is sealed with the outer wall of the rotating housing 1 , and the outer wall of the spring seat 4 located inside the dynamic ring seat 3 is sealed with the inner wall of the dynamic ring seat 3 .

[0032] The first circumferential limiting structure, the second circumferential limiting structure and the third circumferential limiting structure all adopt the same limiting structure, which is arranged on two adjacent parts.

[0033] like Figure 1As shown, one end of the moving ring seat 3 is movably embedded in the stepped outer wall of the spring seat 4, and a first circumferential limiting structure is provided on one end of the moving ring seat 3 and the stepped surface of the spring seat 4. The first circumferential limiting structure includes a plurality of axial pull screws 9 evenly distributed along the circumference, one end of the axial pull screw 9 is movably embedded in the second mounting hole on the stepped surface of the spring seat 4, and the other end is screwed and embedded in the third mounting hole on the end surface of one end of the moving ring seat 3, and the third mounting hole is a threaded hole and is threadedly connected with the screw of the axial pull screw 9. The outer diameter of the front end screw of the axial pull screw 9 is smaller than the outer diameter of the middle polished rod, so that the step of the polished rod end of the axial pull screw 9 abuts against the end surface of the moving ring seat 3.

[0034] The springs 5 ​​and the axis pulling screws 9 are evenly spaced and distributed along the circumference.

[0035] like Figure 2-5 As shown, one end of the moving ring 2 is movably embedded in the inner wall of the step of the moving ring seat 3, and a second circumferential limiting structure is provided between the one end of the moving ring 2 and the inner wall of the step of the moving ring seat 3. The second circumferential limiting structure includes a plurality of first platforms 2.1 evenly distributed along the circumference of the outer wall of one end of the moving ring 2 and a plurality of second platforms 3.3 evenly distributed along the inner wall of the step of the moving ring seat 3.

[0036] like Figure 6-9 As shown, one end of the stationary ring 8 is movably embedded in the stepped inner wall of the stationary ring seat 7, and a third circumferential limiting structure is provided between one end of the stationary ring 8 and the stepped inner wall of the stationary ring seat 7. The third circumferential limiting structure includes a plurality of third platforms 8.1 evenly distributed along the circumference of the outer wall of one end of the stationary ring 8 and a fourth platform 7.3 evenly distributed along the stepped inner wall of the stationary ring seat 7.

[0037] The movable ring seat 3 and the spring seat 4 are provided with an axial sliding gap; one end of the spring 5 is embedded in the first mounting hole on the step surface of the spring seat 4, and the other end is against the end surface of one end of the movable ring seat 3; the movable ring seat 3 and the spring seat 4 are provided with an axial sliding gap, which means that there is a distance between the step of the axial pulling screw 9 and the inner bottom surface of the second mounting hole of the spring seat 4.

[0038] The second mounting hole of the spring seat 4 is a countersunk hole, and the step of the axial pull screw 9 is axially limited with the second mounting hole of the spring seat 4.

[0039] like Figure 1 As shown, the inner wall of the inner end of the dynamic ring seat 3 is provided with a first annular groove 3.1, and the end surface of the inner end is provided with a second annular groove 3.2, a second sealing ring 11 is provided in the first annular groove 3.1, and a third sealing ring 12 is provided in the second annular groove 3.2; a gap is provided between the outer wall of the dynamic ring 2 and the inner wall of the dynamic ring seat 3, and the second sealing ring 11 and the third sealing ring 12 are tightly sealed with the dynamic ring 2 and the dynamic ring seat 3.

[0040] like Figure 1 As shown, the inner wall of the inner end of the stationary ring seat 7 is provided with a third annular groove 7.1, and the end face of the inner end is provided with a fourth annular groove 7.2. A fourth sealing ring 13 is provided in the third annular groove 7.1, and a fifth sealing ring 14 is provided in the fourth annular groove 7.2. A gap is provided between the outer wall of the stationary ring 8 and the inner wall of the stationary ring seat 7, and the fourth sealing ring 13 and the fifth sealing ring 14 are tightly sealed with the stationary ring 8 and the stationary ring seat 7.

Claims

1. A silicon carbide mechanical sealing device for a radar hinge, comprising a moving ring (2) sleeved on a rotating shell (1), a moving ring seat (3), a spring seat (4), a plurality of springs (5), and a stationary ring seat (7) and a stationary ring (8) connected to a stationary shell (6) and sleeved outside the rotating shell (1); the moving ring (2) is tightly attached to the stationary ring (8) by the action of the spring (5) to form a sealing surface; the outer wall of the stationary ring seat (7) is sealed with the stationary shell (6), the inner wall of the spring seat (4) is sealed with the outer wall of the rotating shell (1), and the outer wall of the spring seat (4) located inside the moving ring seat (3) is sealed with the inner wall of the moving ring seat (3); Features: One end of the moving ring seat (3) is movably embedded in the stepped outer wall of the spring seat (4), and one end of the moving ring seat (3) and the stepped surface of the spring seat (4) are provided with a first circumferential limiting structure; one end of the moving ring (2) is movably embedded in the stepped inner wall of the moving ring seat (3), and one end of the moving ring (2) and the stepped inner wall of the moving ring seat (3) are provided with a second circumferential limiting structure; one end of the stationary ring (8) is movably embedded in the stepped inner wall of the stationary ring seat (7), and one end of the stationary ring (8) and the stepped inner wall of the stationary ring seat (7) are provided with a third circumferential limiting structure; the first circumferential limiting structure, the second circumferential limiting structure and the third circumferential limiting structure all adopt the same limiting structure, which is arranged on two adjacent parts, and the moving ring seat (3) and the spring seat (4) are provided with an axial sliding gap; one end of the spring (5) is embedded in the first mounting hole on the stepped surface of the spring seat (4), and the other end is against the end surface of one end of the moving ring seat (3).

2. The silicon carbide mechanical sealing device for radar hinge according to claim 1, characterized in that: The first circumferential limiting structure comprises a plurality of axial pull screws (9) evenly distributed along the circumference, wherein the middle bare rod of the axial pull screw (9) is axially movable and embedded in the second mounting hole of the step surface of the spring seat (4), and the other end is screwed into the third mounting hole of one end surface of the dynamic ring seat (3) through a thread.

3. The silicon carbide mechanical sealing device for radar hinge according to claim 2, characterized in that: The springs (5) and the shaft pulling screws (9) are evenly spaced and distributed along the circumference of the spring seat (4).

4. A silicon carbide mechanical sealing device for radar hinge according to claim 1 or 2, characterized in that: The second circumferential limiting structure comprises a plurality of first platforms (2.1) uniformly distributed along the circumference of the outer wall of one end of the moving ring (2), and second platforms (3.3) uniformly distributed along the inner wall of the step of the moving ring seat (3), and each first platform (2.1) abuts against a corresponding second platform (3.3) when one end of the moving ring (2) is embedded in the inner wall of the step of the moving ring seat (3).

5. A silicon carbide mechanical sealing device for radar hinge according to claim 1 or 2, characterized in that: The third circumferential limiting structure comprises a plurality of third platforms (8.1) evenly distributed along the circumference of the outer wall of one end of the stationary ring (8) and a fourth platform (7.3) evenly distributed along the stepped inner wall of the stationary ring seat (7), and each third platform (8.1) abuts against a corresponding fourth platform (7.3) when one end of the stationary ring (8) is embedded in the stepped inner wall of the stationary ring seat (7).

6. A silicon carbide mechanical sealing device for radar hinge according to claim 2 or 3, characterized in that: The axial sliding gap between the dynamic ring seat (3) and the spring seat (4) means that a distance is provided between the step of the axial pull screw (9) and the inner bottom surface of the second mounting hole of the spring seat (4).

7. The silicon carbide mechanical sealing device for radar hinge according to claim 6, characterized in that: The second mounting hole of the spring seat (4) is a countersunk hole, and the step of the axial pull screw (9) and the second mounting hole of the spring seat (4) are axially limited.

8. The silicon carbide mechanical sealing device for radar hinge according to claim 1, characterized in that: The inner wall of the inner end of the moving ring seat (3) is provided with a first annular groove (3.1), and the end surface of the inner end is provided with a second annular groove (3.2); a second sealing ring (11) is provided in the first annular groove (3.1), and a third sealing ring (12) is provided in the second annular groove (3.2); a gap is provided between the outer wall of the moving ring (2) and the inner wall of the moving ring seat (3), and the second sealing ring (11) and the third sealing ring (12) are tightly sealed with the moving ring (2) and the moving ring seat (3).

9. The silicon carbide mechanical sealing device for radar hinge according to claim 1, characterized in that: The inner wall of the inner end of the stationary ring seat (7) is provided with a third annular groove (7.1), and the end surface of the inner end is provided with a fourth annular groove (7.2); a fourth sealing ring (13) is provided in the third annular groove (7.1), and a fifth sealing ring (14) is provided in the fourth annular groove (7.2); a gap is provided between the outer wall of the stationary ring (8) and the inner wall of the stationary ring seat (7); the fourth sealing ring (13) and the fifth sealing ring (14) are tightly sealed with the stationary ring (8) and the stationary ring seat (7).

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