Installation-adjustable mechanical sealing device

Abstract

The invention discloses an installation-adjustable mechanical sealing device which comprises a supporting ring body, an inner side sealing sleeve, an outer side sealing sleeve, an upper annular gland, a lower annular gland and an installation-adjustable assembly. The central screw rod can be driven to rotate through the driving column, so that the upper floating sleeve and the lower floating sleeve move up and down relatively, the upper annular gland and the lower annular gland are driven to move relatively through transmission of the upper guide rod and the lower guide rod, and tightening or expanding of the upper annular gland and the lower annular gland is achieved; the whole structure can conveniently move in the gap between the piston telescopic shaft and the cylinder body, meanwhile, stable sealing performance can be achieved, and use is convenient and flexible.

Description

Technical Field

[0001] The present invention belongs to the technical field of sealing devices, and particularly relates to an adjustable mechanical sealing device for installation. Background Art

[0002] The hydraulic cylinder is an important power transmission component in the hydraulic transmission system. The sealing performance directly affects the working performance, efficiency and service life of the hydraulic cylinder, and even the normal operation of the whole machine. Among them, the seal between the piston of the hydraulic cylinder and the inner wall of the cylinder barrel is the key seal in the hydraulic cylinder, which directly determines whether the typical fault of internal leakage in the hydraulic cylinder will occur; a high-performance mechanical sealing device is generally the key sealing part between the piston telescopic shaft and the cylinder block. However, it is inconvenient to disassemble and install. The outer periphery of the sealing device needs to be in close contact with the inner periphery of the hydraulic cylinder body, and the inner periphery of the sealing device needs to be in sealing contact with the piston telescopic shaft. Therefore, it is inconvenient to insert the sealing device between the hydraulic cylinder body and the piston telescopic shaft. If it is loose, the sealing performance will be poor; if it is too tight, it is difficult to push the sealing device in. Therefore, it is necessary to upgrade the structure of the existing sealing device to improve the efficiency and convenience of disassembly and installation. Summary of the Invention

[0003] Aiming at the deficiencies of the above-mentioned prior art, the problem solved by the present invention is to provide an adjustable mechanical sealing device for installation that is efficient and convenient for disassembly and installation.

[0004] To solve the above problems, the technical solutions adopted by the present invention are as follows: An adjustable mechanical seal device for installation, comprising a support ring body, an inner seal sleeve, an outer seal sleeve, an upper annular gland, a lower annular gland, and an installation adjustable assembly; an inner cavity of the support ring body; the inner seal sleeve is installed on the inner side of the periphery of the support ring body; the outer seal sleeve is installed on the outer side of the periphery of the support ring body; the upper and lower ends of the inner seal sleeve and the outer seal sleeve respectively extend to the outside of the support ring body; the upper annular gland is installed around the upper end of the support ring body; the lower annular gland is installed around the lower end of the support ring body; the lower side of the upper annular gland abuts against the upper ends of the inner seal sleeve and the outer seal sleeve; the upper side of the lower annular gland abuts against the lower ends of the inner seal sleeve and the outer seal sleeve; the installation adjustable assembly is installed on the support ring body; the installation adjustable assembly includes an upper guide rod, a lower guide rod, an upper floating sleeve, a lower floating sleeve, a central screw rod, and a driving column; two upper guide rods are respectively arranged below both sides of the upper annular gland, the inner ends of the upper guide rods are all slidably installed on the cavity of the support ring body, and an upper floating sleeve is installed between the inner ends of the two upper guide rods on the same side; two lower guide rods are respectively arranged above both sides of the lower annular gland, the inner ends of the lower guide rods are all slidably installed on the cavity of the support ring body, and a lower floating sleeve is installed between the inner ends of the two lower guide rods on the same side; the upper floating sleeve and the lower floating sleeve are threadedly connected through the central screw rod, the upper end of the central screw rod is connected to the driving column, the upper end of the driving column extends to the outside of the upper end of the upper annular gland, the driving column drives the central screw rod to rotate, and enables the upper floating sleeve and the lower floating sleeve to move relatively up and down, and enables the upper annular gland and the lower annular gland to move relatively.

[0005] Further, an upper guide groove is provided on the inner side wall of the upper end of the support ring body; the inner end of the upper guide rod is slidably clamped on the upper guide groove; further, a lower guide groove is provided on the inner side wall of the lower end of the support ring body; the inner end of the lower guide rod is slidably clamped on the lower guide groove.

[0006] Further, a pressing spring is sleeved on the central screw rod, and the upper and lower ends of the pressing spring are respectively elastically pressed between the upper floating sleeve and the lower floating sleeve.

[0007] Further, a sealing ring is provided on the upper annular gland; the driving column passes through the upper annular gland and is sealingly connected to the sealing ring.

[0008] Further, a lower adjustment gap is provided between the upper side of the lower annular gland and the lower end of the support ring body.

[0009] Further, an upper adjustment gap is provided between the lower side of the upper annular gland and the upper end of the support ring body.

[0010] Further, annular cavities are respectively opened on the inner peripheries of the inner seal sleeve and the outer seal sleeve.

[0011] Further, a locking screw sleeve is threadedly connected to the upper part of the driving column; the locking screw sleeve rotates and presses against the upper end face of the upper annular gland.

[0012] Furthermore, the inner sealing sleeve and the outer sealing sleeve are made of elastic rubber material.

[0013] Furthermore, the support ring body is made of high-strength alloy material.

[0014] The beneficial effects of the present invention are as follows: The present invention can drive the central screw to rotate through the driving column, so that the upper floating sleeve and the lower floating sleeve move relatively up and down. Thus, through the transmission of the upper guide rod and the lower guide rod, the upper annular pressing cover and the lower annular pressing cover are driven to perform relative movement. When the upper annular pressing cover and the lower annular pressing cover move relatively closer, the upper annular pressing cover and the lower annular pressing cover will synchronously press the upper and lower ends of the inner sealing sleeve and the outer sealing sleeve, so that the inner sealing sleeve is tightened inwardly around and pressed against the piston telescopic shaft, and the outer sealing sleeve is expanded outwardly around and pressed against the inner side of the cylinder barrel, thus realizing stable sealed installation; when the upper annular pressing cover and the lower annular pressing cover move relatively farther away, the upper annular pressing cover and the lower annular pressing cover will release the pressure on the upper and lower ends of the inner sealing sleeve and the outer sealing sleeve, so that the inner sealing sleeve loses the squeezing force to tighten inwardly around, and at the same time the outer sealing sleeve loses the squeezing force to expand outwardly around. In this way, the whole device can be conveniently inserted into or removed from the gap between the piston telescopic shaft and the cylinder block, and the use is convenient and flexible. Description of the Drawings

[0015] Figure 1 is a schematic structural diagram of the present invention.

[0016] Figure 2 is a schematic structural diagram of one side of the present invention.

[0017] Figure 3 For the present invention Figure 2 is an enlarged schematic structural diagram of the upper side.

[0018] Figure 4 For the present invention Figure 2 is an enlarged schematic structural diagram of the lower side. Detailed Description of the Invention

[0019] The following further describes the content of the present invention in detail with reference to the drawings.

[0020] Such as Figures 1 to 4As shown in the figure, an adjustable mechanical seal device includes a support ring body 1, an inner seal sleeve 2, an outer seal sleeve 3, an upper annular gland 4, a lower annular gland 5, and an installation and adjustment component 6. The inner cavity of the support ring body 1; the inner seal sleeve 2 is installed on the inner side of the periphery of the support ring body 1; the outer seal sleeve 3 is installed on the outer side of the periphery of the support ring body 1; the upper and lower ends of the inner seal sleeve 2 and the outer seal sleeve 3 respectively extend to the outside of the support ring body 1; the upper annular gland 4 is installed around the upper end of the support ring body 1; the lower annular gland 5 is installed around the lower end of the support ring body 1; the lower side of the upper annular gland 4 abuts against the upper ends of the inner seal sleeve 2 and the outer seal sleeve 3; the upper side of the lower annular gland 5 abuts against the lower ends of the inner seal sleeve 2 and the outer seal sleeve 3; the installation and adjustment component 6 is installed on the support ring body 1; the installation and adjustment component 6 includes an upper guide rod 61, a lower guide rod 62, an upper floating sleeve 63, a lower floating sleeve 64, a central screw rod 65, and a driving column 66. Two upper guide rods 61 are respectively arranged below the two sides of the upper annular gland 4, and the inner ends of the upper guide rods 61 are all slidably installed on the cavity of the support ring body, and an upper floating sleeve 63 is installed between the inner ends of the two upper guide rods 61 on the same side; two lower guide rods 62 are respectively arranged above the two sides of the lower annular gland 5, and the inner ends of the lower guide rods 62 are all slidably installed on the cavity of the support ring body, and a lower floating sleeve 64 is installed between the inner ends of the two lower guide rods 62 on the same side; the upper floating sleeve 63 and the lower floating sleeve 64 are threadedly connected through the central screw rod 65, the upper end of the central screw rod 65 is connected to the driving column 66, the upper end of the driving column 66 extends to the outside of the upper end of the upper annular gland 4, the driving column 66 drives the central screw rod 65 to rotate, and makes the upper floating sleeve 63 and the lower floating sleeve 64 move relatively up and down, and makes the upper annular gland 4 and the lower annular gland 5 move relatively.

[0021] As Figures 1 to 4 shown, in order to facilitate the stable up and down movement of the upper annular gland 4 and the upper guide rod 61, further, an upper guide groove 11 is provided on the inner upper side wall of the support ring body 1; the inner end of the upper guide rod 61 is slidably clamped on the upper guide groove 11. In order to facilitate the stable up and down movement of the lower annular gland 5 and the lower guide rod 62, further, a lower guide groove 12 is provided on the inner lower side wall of the support ring body 1; the inner end of the lower guide rod 62 is slidably clamped on the lower guide groove 12.

[0022] As Figures 1 to 4 shown, in order to make the upper floating sleeve 63 and the lower floating sleeve 64 move relatively stably, further, a pressing spring 651 is sleeved on the central screw rod 65, and the upper and lower ends of the pressing spring 651 are respectively elastically pressed between the upper floating sleeve 63 and the lower floating sleeve 64.

[0023] As Figures 1 to 4As shown, in order to seal-connect the driving column 66 and the upper annular gland 4, further, a sealing ring 42 is provided on the upper annular gland 4; the driving column 66 passes through the upper annular gland 4 and is seal-connected with the sealing ring 42.

[0024] As Figures 1 to 4 shown, in order to provide space for the lower annular gland 5 to move up and down, further, a lower adjustment gap 51 is provided between the upper side of the lower annular gland 5 and the lower end of the support ring body 1.

[0025] As Figures 1 to 4 shown, in order to provide space for the upper annular gland 4 to move up and down, further, an upper adjustment gap 41 is provided between the lower side of the upper annular gland 4 and the upper end of the support ring body 1.

[0026] As Figures 1 to 4 shown, in order to improve the elastic telescopic property of the inner sealing sleeve 2 and the outer sealing sleeve 3, further, annular cavities 7 are provided around the inner circumference of the inner sealing sleeve 2 and the outer sealing sleeve 3. In order to strengthen the positioning of the driving column 66 and improve the structural stability, further, a locking screw sleeve 661 is threadedly connected to the upper part of the driving column 66; the locking screw sleeve 661 rotates and presses against the upper end face of the upper annular gland 4. Further, the inner sealing sleeve 2 and the outer sealing sleeve 3 are made of elastic rubber material. Further, the support ring body 1 is made of high-strength alloy material.

[0027] The present invention can drive the central screw 65 to rotate through the driving column 66, so that the upper floating sleeve 63 and the lower floating sleeve 64 move relatively up and down. Thus, through the transmission of the upper guide rod 61 and the lower guide rod 62, the upper annular gland 4 and the lower annular gland 5 are driven to move relatively. When the upper annular gland 4 and the lower annular gland 5 move relatively closer, the upper annular gland 4 and the lower annular gland 5 will synchronously press the upper and lower ends of the inner sealing sleeve 2 and the outer sealing sleeve 3, so that the inner sealing sleeve 2 is tightened inward around the piston telescopic shaft, and the outer sealing sleeve 3 is expanded outward around the inner circumference of the cylinder barrel, thus realizing stable sealed installation; when the upper annular gland 4 and the lower annular gland 5 move relatively away, the upper annular gland 4 and the lower annular gland 5 will release the pressure on the upper and lower ends of the inner sealing sleeve 2 and the outer sealing sleeve 3, so that the inner sealing sleeve 2 loses the squeezing force to tighten inward around, and at the same time the outer sealing sleeve 3 loses the squeezing force to expand outward around, so that the whole device can be conveniently inserted into or removed from the gap between the piston telescopic shaft and the cylinder block, and the use is convenient and flexible.

[0028] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An adjustable mechanical seal device for installation, characterized in that, It includes a support ring body, an inner seal sleeve, an outer seal sleeve, an upper annular gland, a lower annular gland, and an installation and adjustment component; the inner cavity of the support ring body; the inner seal sleeve is installed on the inner side of the periphery of the support ring body; the outer seal sleeve is installed on the outer side of the periphery of the support ring body; the upper and lower ends of the inner seal sleeve and the outer seal sleeve respectively extend to the outside of the support ring body; the upper annular gland is installed around the upper end of the support ring body; the lower annular gland is installed around the lower end of the support ring body; the lower side of the upper annular gland abuts against the upper ends of the inner seal sleeve and the outer seal sleeve; the upper side of the lower annular gland abuts against the lower ends of the inner seal sleeve and the outer seal sleeve; the installation and adjustment component is installed on the support ring body; the installation and adjustment component includes an upper guide rod, a lower guide rod, an upper floating sleeve, a lower floating sleeve, a central screw rod, and a driving column; two upper guide rods are respectively arranged below both sides of the upper annular gland, the inner ends of the upper guide rods are all slidably installed on the cavity of the support ring body, and an upper floating sleeve is installed between the inner ends of the two upper guide rods on the same side; two lower guide rods are respectively arranged above both sides of the lower annular gland, the inner ends of the lower guide rods are all slidably installed on the cavity of the support ring body, and a lower floating sleeve is installed between the inner ends of the two lower guide rods on the same side; the upper floating sleeve and the lower floating sleeve are threadedly connected through the central screw rod, the upper end of the central screw rod is connected to the driving column, the upper end of the driving column extends to the outside of the upper end of the upper annular gland, the driving column drives the central screw rod to rotate, and makes the upper floating sleeve and the lower floating sleeve move relatively up and down, and makes the upper annular gland and the lower annular gland move relatively.

2. The adjustable mechanical seal device according to claim 1, wherein The upper inner side wall of the inner cavity of the support ring body is provided with an upper guide groove; the inner end of the upper guide rod is slidably clamped on the upper guide groove; the lower inner side wall of the inner cavity of the support ring body is provided with a lower guide groove; the inner end of the lower guide rod is slidably clamped on the lower guide groove.

3. The installation-adjustable mechanical seal device according to claim 1, characterized in that, A pressing spring is sleeved on the central screw rod, and the upper and lower ends of the pressing spring are respectively elastically pressed between the upper floating sleeve and the lower floating sleeve.

4. The adjustable mechanical seal device according to claim 1, characterized in that, A sealing ring is provided on the upper annular gland; the driving column passes through the upper annular gland and is hermetically connected to the sealing ring.

5. The installation adjustable mechanical seal device according to claim 1, wherein, There is a lower adjustment gap between the upper side of the lower annular gland and the lower end of the support ring body.

6. The installation-adjustable mechanical seal device according to claim 1, characterized in that, There is an upper adjustment gap between the lower side of the upper annular gland and the upper end of the support ring body.

7. The adjustable mechanical seal device according to claim 1, characterized in that, Annular cavities are opened around the inner circumference of the inner seal sleeve and the outer seal sleeve.

8. The installation-adjustable mechanical seal device according to claim 1, characterized in that, A locking screw sleeve is screwed on the upper part of the driving column; the locking screw sleeve rotates and presses against the upper end face of the upper annular gland.

9. The adjustable mechanical seal device according to claim 1, characterized in that, The inner seal sleeve and the outer seal sleeve are made of elastic rubber material.

10. The adjustable mechanical seal device according to claim 1, characterized in that, The support ring body is made of high-strength alloy material.

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