Mechanical seal for online grinding machine

Abstract

The utility model discloses a mechanical seal for an on-line grinding machine. The mechanical seal comprises a shaft sleeve, a medium end moving ring, a medium end static ring, an atmosphere end moving ring and an atmosphere end static ring, wherein the medium end moving ring, the medium end static ring, the atmosphere end moving ring and the atmosphere end static ring are arranged on the shaft sleeve. A spindle penetrates through the shaft sleeve, one end, close to the atmosphere side, of the shaft sleeve is attached to the spindle, a driving ring is further mounted on the shaft sleeve, one end, close to the atmosphere side, of the driving ring abuts against the shaft sleeve, and a set screw connected with the spindle is arranged on the driving ring. An adjusting gap exists between the end, close to the medium side, of the shaft sleeve and the rotor, and a front end shaft sleeve is arranged in a gap between the end, close to the medium side, of the shaft sleeve and the main shaft so that the axial positioning size of the mechanical seal can be adjusted along the adjusting gap. The precision requirement of the mechanical seal on the axial positioning size of equipment can be greatly reduced, so that the use effect of the mechanical seal is effectively ensured, and the service life of the mechanical seal is prolonged.

Description

Technical Field

[0001] The utility model belongs to the technical field of mechanical seals, in particular to a mechanical seal for an online grinder. Background Art

[0002] At present, most of the mechanical seals used in online grinders in the new energy industry are conventional pump mechanical seals, which are not highly matched with the performance and working conditions of the equipment. Their use effect is general, not stable enough, and their life cycle is short. With the continuous development of the new energy industry, there is a demand for stable operation of the equipment and a longer replacement cycle for the equipment's wearing parts. At present, for the mechanical seal structure used in most online grinders, the shaft sleeve is often installed in a way that the rotor and the frame are clamped and fixed to achieve transmission operation. The error in the axial positioning size of the equipment determines the spring working height error of the mechanical seal, that is, the equipment accuracy has a greater impact on the use of the mechanical seal. Utility Model Content

[0003] The purpose of the utility model is to overcome the defects of the prior art and provide a mechanical seal for an online grinding machine. The front sleeve is arranged to cooperate with the sleeve so that the axial positioning size of the mechanical seal can be adjusted within a small range. After the mechanical seal is installed, its axial positioning can automatically match the equipment and can ensure the normal transmission effect, which greatly reduces the accuracy requirements of the mechanical seal on the axial positioning size of the equipment, and fully ensures that the spring working height of the mechanical seal remains unchanged after installation, which is consistent with the design requirements, thereby effectively ensuring the use effect of the mechanical seal and extending the service life of the mechanical seal.

[0004] The purpose of the utility model is achieved through the following technical solutions:

[0005] A mechanical seal for an online grinding machine comprises a shaft sleeve and a medium end moving ring, a medium end static ring, an atmosphere end moving ring and an atmosphere end static ring arranged on the shaft sleeve;

[0006] Among them, the medium-end dynamic ring and the medium-end static ring are arranged on the medium side and contact each other, the atmospheric-end dynamic ring and the atmospheric-end static ring are arranged on the atmospheric side and contact each other, a main shaft passes through the sleeve, one end of the sleeve close to the atmospheric side is in contact with the main shaft, a driving ring is also installed thereon, one end of the driving ring close to the atmospheric side is in contact with the sleeve, a set screw connected to the main shaft is arranged on the driving ring; an adjustment gap exists between one end of the sleeve close to the medium side and the rotor, a front end sleeve is arranged in the gap between one end of the sleeve close to the medium side and the main shaft, one end of the front end sleeve is in contact with the rotor, an O-ring in contact with the rotor is embedded in the front end sleeve, so that the axial positioning size of the mechanical seal can be adjusted along the adjustment gap.

[0007] In one embodiment, an O-ring is provided at the outer circle of the static ring at the medium end close to the atmosphere side. Through this embodiment, material blockage in this part is effectively prevented, ensuring that the static ring at the medium end has good floating properties, thereby ensuring good fit between the static ring sealing end face and the dynamic ring sealing end face, ensuring that the operation of the mechanical seal is more stable.

[0008] In one embodiment, one end of the medium-end moving ring is connected to an elastic member, and a star-shaped sealing ring is also provided on the outer circle of the medium-end moving ring. Through this embodiment, a star-shaped sealing ring is used instead of a conventional O-ring, and its contact area is smaller and the sliding friction resistance is relatively low, which fully ensures that the medium-end moving ring has excellent compensation under the action of the spring force, thereby ensuring the reliability of the mechanical seal operation.

[0009] In one embodiment, it also includes a first pressure cover, which is arranged on the outer ring of the medium end static ring. The medium end static ring is connected to the first pressure cover through a fixing pin, and an O-ring is arranged between the first pressure cover and the medium end static ring.

[0010] In one embodiment, it also includes a second pressure cover, which is arranged on the outer ring of the atmospheric end static ring. The atmospheric end static ring is connected to the second pressure cover through a fixing pin, and an O-ring is arranged between the second pressure cover and the atmospheric end static ring.

[0011] In one embodiment, it further includes a spring seat arranged on the shaft sleeve, on which a spring abutting against a push ring is arranged, and the push ring contacts the end of the atmospheric end dynamic ring.

[0012] In one embodiment, a hanging ring is provided on the second gland.

[0013] In one embodiment, the first gland further includes a fixing portion extending in a direction away from the main shaft, and the fixing portion is provided with a cylindrical head screw for connecting with the frame.

[0014] The beneficial effects of the utility model are:

[0015] (1) The front end sleeve is matched with the sleeve to form an adjustment gap between the sleeve and the rotor. The drive ring and the set screw at the other end of the sleeve are used to make the axial positioning size of the mechanical seal automatically match the equipment after installation, thereby ensuring the normal transmission effect, reducing the accuracy requirements of the mechanical seal on the axial positioning size of the equipment, and fully ensuring that the spring working height of the mechanical seal remains unchanged after installation, which is consistent with the design requirements, thereby effectively ensuring the use effect of the mechanical seal and extending the service life of the mechanical seal.

[0016] (2) An O-ring is used on the outer circle of the static ring at the medium end to effectively prevent material blockage at this point and ensure that the static ring at the medium end has good floating properties, thereby ensuring good fit between the static ring sealing end face and the dynamic ring sealing end face, ensuring more stable operation of the mechanical seal.

[0017] (3) A star-shaped sealing ring with smaller sliding friction resistance is used at the sliding position of the moving ring at the medium end to replace the conventional O-ring, which fully ensures that the moving ring at the medium end has excellent compensation under the action of the spring force, thereby ensuring the reliability of the mechanical seal operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention will be described in more detail below based on embodiments and with reference to the accompanying drawings.

[0019] in:

[0020] Figure 1 A schematic structural diagram of an embodiment of the utility model is shown;

[0021] In the drawings, like reference numerals are used for like parts. The drawings are not necessarily to scale.

[0022] Reference numerals:

[0023] 1-sleeve, 2-dynamic ring at medium end, 3-static ring at medium end, 4-dynamic ring at atmosphere end, 5-static ring at atmosphere end, 6-spindle, 7-rotor, 8-O-ring, 9-star-shaped ring, 10-first gland, 11-second gland, 12-fixing pin, 13-spring seat, 14-spring, 15-push ring, 16-lifting ring, 17-fixing part, 18-cylinder head screw, 19-set screw, 20-front end sleeve, 21-drive ring, 22-frame. DETAILED DESCRIPTION

[0024] The utility model will be further described below in conjunction with the accompanying drawings.

[0025] The utility model provides a mechanical seal for an online grinding machine, such as Figure 1 As shown, it includes a shaft sleeve 1 and a medium end moving ring 2, a medium end static ring 3, an atmosphere end moving ring 4 and an atmosphere end static ring 5 arranged on the shaft sleeve 1;

[0026] Among them, the medium-end dynamic ring 2 and the medium-end static ring 3 are arranged on the medium side and contact each other, the atmosphere-end dynamic ring 4 and the atmosphere-end static ring 5 are arranged on the atmosphere side and contact each other, a main shaft 6 is passed through the sleeve 1, and one end of the sleeve 1 close to the atmosphere side is in contact with the main shaft 6, and a driving ring 21 is also installed thereon, and one end of the driving ring 21 close to the atmosphere side is in contact with the sleeve 1, and a set screw 19 connected to the main shaft 6 is arranged on the driving ring 21; there is an adjustment gap between one end of the sleeve 1 close to the medium side and the rotor 7, and a front end sleeve 20 is arranged in the gap between one end of the sleeve 1 close to the medium side and the main shaft 6, and one end of the front end sleeve 20 is in contact with the rotor 7, and an O-ring 8 in contact with the rotor 7 is embedded in the front end sleeve 20, so that the axial positioning size of the mechanical seal can be adjusted along the adjustment gap;

[0027] It should be noted that, by cooperating with the sleeve 1 through the provision of the front end sleeve 20, an adjustment gap is formed between the sleeve 1 and the rotor 7, and by utilizing the drive ring 21 at the other end of the sleeve 1 and the set screw 19, the axial positioning dimension of the mechanical seal can be automatically matched with the equipment after installation, thereby ensuring the normal transmission effect, reducing the accuracy requirements of the mechanical seal on the axial positioning dimension of the equipment, and fully ensuring that the working height of the spring 14 of the mechanical seal remains unchanged after installation, which is consistent with the design requirements, thereby effectively ensuring the use effect of the mechanical seal and extending the service life of the mechanical seal.

[0028] Furthermore, if Figure 1 As shown, an O-ring 8 is provided at the outer circumference of the static ring 3 at the medium end close to the atmosphere side, which effectively prevents the material from clogging this part and ensures that the static ring 3 at the medium end has good floating performance, thereby ensuring good fit between the static ring sealing end face and the dynamic ring sealing end face, and ensuring more stable operation of the mechanical seal;

[0029] In one embodiment, one end of the medium end moving ring 2 is connected to an elastic member, and a star-shaped sealing ring 9 is also provided at the outer circumference of the medium end moving ring 2, that is, the star-shaped sealing ring 9 is used to replace the conventional O-ring, and its contact area is smaller and the sliding friction resistance is relatively low, which fully ensures that the medium end moving ring 2 has excellent compensation under the action of the spring 14, thereby ensuring the reliability of the mechanical seal operation;

[0030] In one embodiment, a balanced mechanical seal structure is used on the atmosphere side, which has sufficient cooling effect and improved pressure bearing capacity, greatly improving the use effect of the mechanical seal and extending the service life of the mechanical seal;

[0031] In one embodiment, Figure 1As shown, it also includes a first gland 10 and a second gland 11. The first gland 10 is arranged on the outer ring of the medium end static ring 3, and the medium end static ring 3 is connected to the first gland 10 through a fixing pin 12. An O-ring 8 is arranged between the first gland 10 and the medium end static ring 3. The second gland 11 is arranged on the outer ring of the atmospheric end static ring 5, and the atmospheric end static ring 5 is connected to the second gland 11 through a fixing pin 12. An O-ring 8 is arranged between the second gland 11 and the atmospheric end static ring 5. A lifting ring 16 is arranged on the second gland 11 for easy lifting. The first gland 10 also extends a fixing portion 17 in a direction away from the main shaft 6, and a cylindrical head screw 18 for connecting with the frame 22 is penetrated on the fixing portion 17, that is, the first gland 10 is used to connect the machine seal with the frame 22;

[0032] In the description of the present invention, it should be understood that the terms "upper", "lower", "bottom", "top", "front", "back", "inside", "outside", "left", "right", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0033] Although the present invention is described herein with reference to specific embodiments, it should be understood that these embodiments are merely examples of the principles and applications of the present invention. It should therefore be understood that many modifications may be made to the exemplary embodiments, and other arrangements may be designed without departing from the spirit and scope of the present invention as defined by the appended claims. It should be understood that the features described in the various dependent claims and herein may be combined in a manner different from that described in the original claims. It may also be understood that the features described in conjunction with the individual embodiments may be used in other described embodiments.

Claims

1. A mechanical seal for an online grinding machine, characterized in that: It includes a shaft sleeve and a medium end moving ring, a medium end static ring, an atmosphere end moving ring and an atmosphere end static ring arranged on the shaft sleeve; Among them, the medium-end dynamic ring and the medium-end static ring are arranged on the medium side and contact each other, the atmospheric-end dynamic ring and the atmospheric-end static ring are arranged on the atmospheric side and contact each other, a main shaft passes through the sleeve, one end of the sleeve close to the atmospheric side is in contact with the main shaft, a driving ring is also installed thereon, one end of the driving ring close to the atmospheric side is in contact with the sleeve, a set screw connected to the main shaft is arranged on the driving ring; an adjustment gap exists between one end of the sleeve close to the medium side and the rotor, a front end sleeve is arranged in the gap between one end of the sleeve close to the medium side and the main shaft, one end of the front end sleeve is in contact with the rotor, an O-ring in contact with the rotor is embedded in the front end sleeve, so that the axial positioning size of the mechanical seal can be adjusted along the adjustment gap.

2. A mechanical seal for an online grinding machine according to claim 1, characterized in that: An O-type sealing ring is arranged at the outer circle of one end of the medium end static ring close to the atmosphere side.

3. The mechanical seal for an online grinding machine according to claim 1, characterized in that: One end of the medium end moving ring is connected with an elastic member, and a star-shaped sealing ring is also arranged on the outer circle of the medium end moving ring.

4. The mechanical seal for an online grinding machine according to claim 1, characterized in that: It also includes a first gland, which is arranged on the outer ring of the medium end static ring. The medium end static ring is connected to the first gland through a fixing pin, and an O-ring is arranged between the first gland and the medium end static ring.

5. A mechanical seal for an online grinding machine according to claim 4, characterized in that: It also includes a second gland, which is arranged on the outer ring of the atmospheric end static ring. The atmospheric end static ring is connected to the second gland via a fixing pin, and an O-ring is arranged between the second gland and the atmospheric end static ring.

6. The mechanical seal for an online grinding machine according to claim 1, characterized in that: It also includes a spring seat arranged on the shaft sleeve, on which a spring abutting against a push ring is arranged, and the push ring contacts the end of the atmospheric end dynamic ring.

7. The mechanical seal for an online grinding machine according to claim 5, characterized in that: The second gland is provided with a lifting ring.

8. The mechanical seal for an online grinding machine according to claim 4, characterized in that: The first gland is also provided with a fixing portion extending in a direction away from the main shaft, and the fixing portion is provided with a cylindrical head screw for connecting with the frame.

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