Pin transmission type mechanical sealing element

Abstract

The utility model discloses a pin transmission type mechanical sealing element, which relates to the technical field of mechanical sealing elements, and comprises a rotating shaft, the outer wall of the rotating shaft is movably connected with a shaft sleeve, the outer wall of the shaft sleeve is movably connected with a sealing gland, and a static ring and a rotating ring are arranged between the shaft sleeve and the sealing gland. The static ring is located on the outer surface of one side of the rotating ring, the outer wall of the other side of the static ring is sleeved with a sealing ring, the outer wall of the rotating shaft is detachably connected with a locking clamping ring, and the locking clamping ring is located on the outer surface of one side of the sealing gland. According to the utility model, through the arrangement of the limiting clamping ring and the arc-shaped clamping block, the fixing bolt can be quickly and stably fixed on the locking clamping ring, so that the problems that a gap is generated between the sealing gland and the shaft sleeve, the abrasion between the shaft sleeve and the sealing gland is accelerated and the like due to the looseness of the fixing bolt when the rotating shaft rotates are solved; and the service life and the sealing performance of the whole mechanical sealing element are reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of mechanical seals, and particularly relates to a pin-driven mechanical seal. Background Technique

[0002] A mechanical seal is a shaft seal device that relies on a pair or several pairs of end faces that slide relative to the axis perpendicularly. Under the action of fluid pressure and the elastic force (or magnetic force) of the compensation mechanism, they are kept in contact and equipped with auxiliary seals to achieve leakage prevention. This sealing method is commonly used in rotary fluid machinery such as pumps, compressors, and reactors, as well as in occasions that require sealing such as gearboxes and ship stern shafts. The basic components of a mechanical seal include a stationary ring (static ring), a rotating ring (dynamic ring), an elastic element spring seat, a set screw, a rotating ring auxiliary seal ring, and a stationary ring auxiliary seal ring, etc. The anti-rotation pin is fixed on the gland to prevent the stationary ring from rotating. This structure of the mechanical seal makes it a general shaft seal device, having the advantages of less leakage and long life, so it is widely used in various rotary fluid machinery.

[0003] However, it still has some disadvantages. For example, in the existing mechanical seals, when fixedly connecting the rotating shaft and the locking collar and fixing the gland on the shaft, most of them use bolts for fixed connection. Under the rotation of the rotating shaft, vibrations will occur, causing the bolts threaded on the locking collar to become loose, and a gap will be generated between the gland and the shaft sleeve, accelerating the wear between the shaft sleeve and the gland, reducing the service life and sealing performance of the entire mechanical seal. Moreover, after the bolts are disassembled and assembled multiple times, there will be more or less a certain amount of wear, and when tightening the bolts, excessive force will also cause wear of the bolts, affecting the fixation of the bolts to the locking collar. Content of the Utility Model

[0004] The purpose of the utility model is to provide a pin-driven mechanical seal to solve the problems raised in the above background technique.

[0005] To solve the above technical problems, a pin-driven mechanical seal includes a rotating shaft. An outer wall of the rotating shaft is movably connected with a shaft sleeve. An outer wall of the shaft sleeve is movably connected with a gland. A stationary ring and a rotating ring are arranged between the shaft sleeve and the gland, and the stationary ring is located on an outer surface of one side of the rotating ring. A sealing ring is sleeved on an outer wall of the other side of the stationary ring. An outer wall of the rotating shaft is detachably connected with a locking collar, and the locking collar is located on an outer surface of one side of the gland.

[0006] Further, an outer wall of the locking collar is threadedly connected with a fixing bolt. An upper outer wall of the fixing bolt is fixedly connected with an arc-shaped clamping block. An upper outer surface of the fixing bolt is detachably connected with a limiting collar, and the limiting collar is located on an upper outer wall of the locking collar.

[0007] Furthermore, an arc-shaped block groove is formed on the inner wall of the limit snap ring, and the arc-shaped block groove is adaptively connected to the arc-shaped block.

[0008] Furthermore, connecting rods are fixedly connected to the outer surfaces of the left and right sides of the lower end of the limit snap ring, and a trapezoidal block is movably connected to the outer surface of one side of the connecting rod.

[0009] Furthermore, a first connecting block is fixedly connected to the inner surface of the trapezoidal block, and a telescopic rod is fixedly connected to the outer surface of one side of the first connecting block.

[0010] Furthermore, one end of the telescopic rod is movably connected to a sleeve, and a spring is sleeved on the outer walls of the telescopic rod and the sleeve.

[0011] Furthermore, a second connecting block is fixedly connected to the outer surface of one end of the sleeve, a fixing groove is formed on the outer surface of one side of the connecting rod, and the sleeve and the second connecting block are both located in the inner cavity of the fixing groove.

[0012] Furthermore, a positioning groove is formed on the outer wall of the locking snap ring, a clamping groove is formed on the inner surface of the positioning groove, and the clamping groove is clamped and connected to the trapezoidal block.

[0013] Compared with the prior art, the beneficial effects of the present utility model are as follows: By providing the limit snap ring and the arc-shaped block, when the end faces of the rotating ring and the static ring are mutually attached and move relatively, first fix the fixing bolt in the locking snap ring, then sleeved the limit block on the outer wall of the fixing bolt, and insert the connecting rod fixedly connected to the lower end of the limit block and the trapezoidal block into the positioning groove. In addition, the provided telescopic rod and the sleeve can make the trapezoidal block more stable when it expands and contracts back and forth. When the trapezoidal block is clamped in the clamping groove, the fixing bolt can be quickly fixed on the locking snap ring, preventing the problem that when the rotating shaft rotates, the fixing bolt loosens, resulting in a gap between the sealing gland and the shaft sleeve, accelerating the wear between the shaft sleeve and the sealing gland, reducing the service life and sealing performance of the entire mechanical seal. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is a schematic structural diagram of a pin drive type mechanical seal;

[0015] Figure 2 is a schematic structural diagram of a bolt and a limit snap ring in a pin drive type mechanical seal;

[0016] Figure 3 is a side view of a bolt and a limit snap ring in a pin drive type mechanical seal;

[0017] Figure 4 is a partial enlarged view of A in a pin drive type mechanical seal;

[0018] Figure 5 It is a partial enlarged view of B in a pin drive type mechanical seal.

[0019] In the figure: 1, rotating shaft; 2, shaft sleeve; 3, sealing gland; 4, stationary ring; 5, rotating ring; 6, sealing ring; 7, locking snap ring; 8, fixing bolt; 9, arc-shaped block; 10, limit snap ring; 11, arc-shaped block groove; 12, connecting rod; 13, trapezoidal block; 14, connecting block 1; 15, telescopic rod; 16, sleeve; 17, spring; 18, connecting block 2; 19, fixing groove; 20, positioning groove; 21, clamping groove. Specific implementation mode

[0020] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0021] Please refer to Figures 1-5 , the present invention provides a technical solution:

[0022] Refer to Figure 1 As shown in the figure, a pin drive type mechanical seal includes a rotating shaft 1. The outer wall of the rotating shaft 1 is movably connected with a shaft sleeve 2. The outer wall of the shaft sleeve 2 is movably connected with a sealing gland 3. A stationary ring 4 and a rotating ring 5 are arranged between the shaft sleeve 2 and the sealing gland 3, and the stationary ring 4 is located on the outer surface of one side of the rotating ring 5. The outer wall of the other side of the stationary ring 4 is sleeved with a sealing ring 6. The outer wall of the rotating shaft 1 is detachably connected with a locking snap ring 7, and the locking snap ring 7 is located on the outer surface of one side of the sealing gland 3. Its overall structure is simple and convenient for installation and operation.

[0023] Refer to Figures 2-3 As shown in the figure, the outer wall of the locking snap ring 7 is threadedly connected with a fixing bolt 8. The upper outer wall of the fixing bolt 8 is fixedly connected with an arc-shaped block 9. The upper outer surface of the fixing bolt 8 is detachably connected with a limit snap ring 10, and the limit snap ring 10 is located on the upper outer wall of the locking snap ring 7. The inner wall of the limit snap ring 10 is provided with an arc-shaped block groove 11, and the arc-shaped block groove 11 and the arc-shaped block 9 are adaptively connected. By setting the arc-shaped block 9, it can be clamped and connected with the arc-shaped block groove 11 to prevent the fixing bolt 8 from loosening.

[0024] Refer to Figures 3-5As shown in the figure, on the outer surfaces of the left and right sides at the lower end of the limit snap ring 10, there are connecting rods 12 fixedly connected. On the outer surface of one side of the connecting rod 12, there is a trapezoidal clamping block 13 movably connected. By setting the trapezoidal clamping block 13, it is convenient for us to clamp the connecting rod 12 and the limit snap ring 10 on the locking snap ring 7 or disassemble them from the locking snap ring 7. On the inner surface of the trapezoidal clamping block 13, there is a connecting block one 14 fixedly connected. On the outer surface of one side of the connecting block one 14, there is a telescopic rod 15 fixedly connected. At one end of the telescopic rod 15, there is a sleeve 16 movably connected, and a spring 17 is sleeved on the outer walls of the telescopic rod 15 and the sleeve 16. At one end of the sleeve 16, there is a connecting block two 18 fixedly connected. By setting the telescopic rod 15 and the sleeve 16, when the trapezoidal clamping block 13 makes a back-and-forth telescopic movement, it will be more stable. On the outer surface of one side of the connecting rod 12, there is a fixing groove 19, and both the sleeve 16 and the connecting block two 18 are located in the inner cavity of the fixing groove 19. On the outer wall of the locking snap ring 7, there is a positioning groove 20. On the inner surface of the positioning groove 20, there is a clamping groove 21, and the clamping groove 21 and the trapezoidal clamping block 13 are in a clamping connection. By setting the positioning groove 20, it is convenient for us to quickly position the fixing bolt 8.

[0025] Working principle:

[0026] For a pin drive type mechanical seal, when in use, first, when the two end faces of the rotating ring 5 and the stationary ring 4 are in mutual contact and move relatively, by setting the limit snap ring 10 and the arc-shaped clamping block 9, when the fixing bolt 8 is first fixed in the locking snap ring 7, the limit snap ring 10 is sleeved on the outer wall of the fixing bolt 8. The connecting rod 12 fixedly connected to the lower end of the limit snap ring 10 and the trapezoidal clamping block 13 are inserted into the positioning groove 20. And by setting the telescopic rod 15 and the sleeve 16, when the trapezoidal clamping block 13 makes a back-and-forth telescopic movement, it will be more stable. Then, when the trapezoidal clamping block 13 is clamped in the clamping groove 21, the fixing bolt 8 can be quickly fixed on the locking snap ring 7, preventing problems such as the fixing bolt 8 loosening when the rotating shaft 1 rotates, resulting in a gap between the sealing gland 3 and the shaft sleeve 2, accelerating the wear between the shaft sleeve 2 and the sealing gland 3, and reducing the service life and sealing performance of the entire mechanical seal.

[0027] Based on the embodiments in the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

Claims

1. A pin-driven mechanical seal, comprising a rotating shaft (1), characterized in that: The outer wall of the rotating shaft (1) is movably connected to a shaft sleeve (2), and the outer wall of the shaft sleeve (2) is movably connected to a sealing cover (3). A stationary ring (4) and a rotating ring (5) are arranged between the shaft sleeve (2) and the sealing cover (3), and the stationary ring (4) is located on one side of the outer surface of the rotating ring (5). The other side of the outer wall of the stationary ring (4) is sleeved with a sealing ring (6). The outer wall of the rotating shaft (1) is detachably connected to a locking snap ring (7), and the locking snap ring (7) is located on one side of the outer surface of the sealing cover (3).

2. A pin-driven mechanical seal according to claim 1, characterized in that: The outer wall of the locking clamp (7) is threadedly connected to a fixing bolt (8), the upper outer wall of the fixing bolt (8) is fixedly connected to an arc-shaped clamping block (9), the upper outer surface of the fixing bolt (8) is detachably connected to a limiting clamp (10), and the limiting clamp (10) is located on the upper outer wall of the locking clamp (7).

3. A pin-driven mechanical seal according to claim 2, characterized in that: An arc-shaped clamping block groove (11) is provided on the inner wall of the limiting clamping ring (10), and the arc-shaped clamping block groove (11) and the arc-shaped clamping block (9) are adaptively connected.

4. A pin-driven mechanical seal according to claim 2, characterized in that: The left and right outer surfaces of the lower end of the limiting clamp ring (10) are fixedly connected to a connecting rod (12), and the outer surface of one side of the connecting rod (12) is movably connected to a trapezoidal clamping block (13).

5. A pin-driven mechanical seal according to claim 4, characterized in that: The inner surface of the trapezoidal clamping block (13) is fixedly connected to a connecting block 1 (14), and the outer surface of one side of the connecting block 1 (14) is fixedly connected to a telescopic rod (15).

6. A pin-driven mechanical seal according to claim 5, characterized in that: The outer surface of one end of the telescopic rod (15) is movably connected with a sleeve (16), and the outer walls of the telescopic rod (15) and the sleeve (16) are sleeved with a spring (17).

7. A pin-driven mechanical seal according to claim 6, characterized in that: A second connecting block (18) is fixedly connected to the outer surface of one end of the sleeve (16), a fixing groove (19) is provided on the outer surface of one side of the connecting rod (12), and the sleeve (16) and the second connecting block (18) are both located in the inner cavity of the fixing groove (19).

8. A pin-driven mechanical seal according to claim 1, characterized in that: The outer wall of the locking clamp ring (7) is provided with a positioning groove (20), the inner surface of the positioning groove (20) is provided with a clamping groove (21), and the clamping groove (21) is clamped to the trapezoidal clamping block (13).

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