CN210397225U

CN210397225U - Hydraulic shaft seal part

Info

Publication number: CN210397225U
Application number: CN201921369690.2U
Authority: CN
Inventors: 苏立锋
Original assignee: Wuxi Gaozhuo Fluid Equipment Co ltd
Current assignee: Wuxi Gaozhuo Fluid Equipment Co ltd
Priority date: 2019-08-22
Filing date: 2019-08-22
Publication date: 2020-04-24
Anticipated expiration: 2029-08-22

Abstract

The utility model belongs to the technical field of hydraulic shaft seal, especially, be a hydraulic shaft seal, include the pump body and connect the pump shaft in the pump body, the link that corresponds the pump shaft on the pump body is equipped with the gland, the gland passes through the bolt-up on the pump body, the inside of the pump body corresponds the epaxial bearing that is equipped with of pump, the epaxial one side that corresponds the bearing and is close to the gland of pump is equipped with mechanical seal, the epaxial one side that corresponds mechanical seal of pump is equipped with the packing ring, be connected through assisting the casting die between gland and the pump body, gland and mechanical seal and the pump body and bearing. The utility model discloses can make the bearing seal structure more compact, make the packing force of gland more even simultaneously, greatly improve the compactness of shaft seal spare to make the liquid seal effect obtain improving, improved the leakproofness of the pump body, can prevent effectively that high-pressure liquid from leaking from the pump, and prevent that air and dust impurity from getting into in the pump body, guaranteed the steady operation of hydraulic pump.

Description

Hydraulic shaft seal part

Technical Field

The utility model relates to a hydraulic pressure bearing seal technical field specifically is a hydraulic pressure bearing seal spare.

Background

The shaft seal is a friction seal or stuffing box used for preventing liquid leakage between a shaft and a bearing of a compressor or other fluid conveying equipment and is a sealing device arranged for preventing leakage between a pump shaft and a shell. Common types of shaft seals are packing seals, mechanical seals and dynamic seals.

However, in the prior art, the hydraulic shaft seal structure is unreasonable in design, poor in tightness of the structure, poor in liquid seal effect and insufficient in sealing performance.

SUMMERY OF THE UTILITY MODEL

Technical problem to be solved

The not enough to prior art, the utility model provides a hydraulic pressure shaft seal has solved prior art, and hydraulic pressure shaft seal structural design is unreasonable, and the compactness of structure is relatively poor, and the liquid seal effect is not good, has the problem of the not enough defect of leakproofness.

(II) technical scheme

In order to achieve the above object, the utility model provides a following technical scheme: a hydraulic shaft seal comprises a pump body and a pump shaft connected in the pump body, wherein a gland is arranged at the connecting end of the pump body corresponding to the pump shaft, the gland is fastened on the pump body through bolts, a bearing is arranged in the pump body corresponding to the pump shaft, a mechanical seal is arranged at one side of the pump shaft corresponding to the bearing close to the gland, a gasket is arranged at one side of the pump shaft corresponding to the mechanical seal, the gland and the pump body, the gland and the mechanical seal as well as the pump body and the bearing are connected through an auxiliary pressing piece, the auxiliary pressing piece is formed by integrally casting a middle sleeve, a front shaft tube, an extension plate and a rear limiting tube, the front shaft tube, the middle sleeve, the extension plate and the rear limiting tube are sequentially connected from left to right, a mechanical seal cavity for embedding the mechanical seal is arranged in the middle sleeve, a shaft passage matched with the pump shaft is arranged in the front shaft tube, a limiting passage matched with the bearing is arranged in the rear, be equipped with first sealing washer between the terminal surface of being connected of gland and preceding central siphon, be equipped with the second sealing washer between the terminal surface of being connected of the spacing pipe of back and the pump body, be equipped with the third sealing washer between the terminal surface of being connected of the pump body and gland.

As a preferred technical scheme of the utility model, be equipped with protruding circle on the terminal surface of being connected of the gland and the pump body, be equipped with on the terminal surface of being connected of the pump body and gland with the circle groove of protruding circle looks adaptation, the bottom and the extension board of protruding circle are kept away from well sheathed tube terminal surface butt.

As an optimal technical scheme of the utility model, the diameter of crossing the axle passageway is greater than the diameter in machine seal chamber, the diameter in machine seal chamber is greater than the diameter of spacing passageway.

As an optimized technical scheme of the utility model, first sealing washer, second sealing washer and third sealing washer all adopt polytetrafluoroethylene O type sealing washer.

(III) advantageous effects

Compared with the prior art, the utility model provides a hydraulic shaft seal possesses following beneficial effect:

this hydraulic shaft seal spare, through at gland and the pump body, gland and mechanical seal and the pump body are connected through assisting the casting die between the bearing, the use of cooperation packing ring, make the bearing seal structure more compact, make the packing force of gland more even simultaneously, the compactness of shaft seal spare has greatly been improved, thereby make the liquid seal effect obtain improving, through first sealing washer, the setting of second sealing washer and third sealing washer, the leakproofness of the pump body has greatly been improved, can effectively prevent high-pressure liquid from leaking from the pump, and prevent that air and dust impurity from getting into in the pump body, the steady operation of hydraulic pump has been guaranteed.

Drawings

Fig. 1 is a schematic structural view of the present invention;

fig. 2 is a schematic structural view of the middle auxiliary pressing member of the present invention.

In the figure: 1. a pump body; 2. a pump shaft; 3. a gland; 4. a bolt; 5. a bearing; 6. mechanical sealing; 7. a gasket; 8. auxiliary pressing parts; 801. a middle sleeve; 802. a front axle tube; 803. a stretching plate; 804. a rear limit pipe; 9. a mechanical seal cavity; 10. a through-shaft passage; 11. a limiting channel; 12. a first seal ring; 13. a second seal ring; 14. and a third sealing ring.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Examples

Referring to fig. 1-2, the present invention provides the following technical solutions: a hydraulic shaft seal comprises a pump body 1 and a pump shaft 2 connected in the pump body 1, wherein a gland 3 is arranged at the connecting end of the pump body 1 corresponding to the pump shaft 2, the gland 3 is fastened on the pump body 1 through bolts 4, a bearing 5 is arranged in the pump body 1 corresponding to the pump shaft 2, a mechanical seal 6 is arranged on one side of the pump shaft 2 corresponding to the bearing 5 and close to the gland 3, a gasket 7 is arranged on one side of the pump shaft 2 corresponding to the mechanical seal 6, the gland 3 is connected with the pump body 1, the gland 3, the mechanical seal 6 and the pump body 1 and the bearing 5 through an auxiliary pressing part 8, the auxiliary pressing part 8 is formed by integrally casting a middle sleeve pipe 801, a front shaft pipe 802, an extension plate 803 and a rear limiting pipe 804, the front shaft pipe 802, the middle sleeve pipe 801, the extension plate 803 and the rear limiting pipe 804 are sequentially connected from left to right, a mechanical seal cavity 9 for embedding the mechanical seal 6 is arranged in the middle sleeve pipe 801, a shaft, the inside of the back spacing pipe 804 is equipped with the spacing passageway 11 with bearing 5 looks adaptation, is equipped with first sealing washer 12 between the terminal surface of connecting of gland 3 and preceding central siphon 802, is equipped with second sealing washer 13 between the terminal surface of connecting of the spacing pipe 804 of back and the pump body 1, is equipped with third sealing washer 14 between the terminal surface of connecting of the pump body 1 and gland 3.

In this embodiment, the mechanical seal 6 can be replaced by a packing seal structure, the packing seal structure is composed of a support ring and a packing seal, the support ring is arranged on the pump shaft 2 corresponding to one side of the packing seal away from the gasket 7, the support ring is arranged to limit and seal the packing seal, and the packing seal structure can also play a good liquid seal role.

Specifically, a convex ring is arranged on the connecting end face of the gland 3 and the pump body 1, a ring groove matched with the convex ring is arranged on the connecting end face of the pump body 1 and the gland 3, and the bottom of the convex ring is abutted to the end face of the extension plate 803 far away from the middle sleeve 801.

In this embodiment, through the joint cooperation of protruding circle with the circle groove, make the gland 3 inseparabler with the link of the pump body 1, the fastening effect of cooperation bolt 4 makes connection structure more stable.

Specifically, the diameter of the shaft passing channel 10 is larger than that of the mechanical seal cavity 9, and the diameter of the mechanical seal cavity 9 is larger than that of the limiting channel 11.

In this embodiment, above-mentioned structural design is more reasonable, the installation and the change of mechanical seal 6 of being convenient for.

Specifically, the first seal ring 12, the second seal ring 13 and the third seal ring 14 are all made of teflon O-shaped seal rings.

In the embodiment, the polytetrafluoroethylene O-shaped sealing ring has good chemical resistance, keeps the original flexibility and elasticity of the rubber sealing ring, can easily work on static sealing and dynamic sealing, increases the contact area and reduces the possibility of failure due to compression deformation.

The utility model discloses a theory of operation and use flow: when the auxiliary pressing piece 8 penetrates through the pump shaft 2 and is pressed on the gasket 7, the mechanical seal 6 and between the pump body 1 and the bearing 5, the gland 3 is pressed tightly and is fastened on the pump body 1 through the bolt 4, so that the connection structure between the pump body 1, the gland 3 and the shaft seal piece consisting of the mechanical seal 6, the gasket 7 and the auxiliary pressing piece 8 is tighter, the pressing force of the gland 3 is more uniform, the liquid sealing effect is improved, the arrangement of the first sealing ring 12, the second sealing ring 13 and the third sealing ring 14 improves the sealing performance between the gland 3 and the front shaft tube 802, between the rear limiting tube 804 and the pump body 1 and between the connection end faces of the pump body 1 and the gland 3, the leakage of high-pressure liquid in the hydraulic pump from the pump is effectively prevented, external air is effectively prevented, air and dust impurities are prevented from entering the pump, and the stable operation of the hydraulic pump is ensured.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing embodiments, or equivalents may be substituted for elements thereof. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a hydraulic pressure shaft seal spare, includes pump body (1) and connects pump shaft (2) in the pump body (1), its characterized in that: the pump is characterized in that a gland (3) is arranged at the connecting end of the pump body (1) corresponding to the pump shaft (2), the gland (3) is fastened on the pump body (1) through bolts (4), a bearing (5) is arranged in the pump body (1) corresponding to the pump shaft (2), a mechanical seal (6) is arranged on one side of the pump shaft (2) corresponding to the bearing (5) and close to the gland (3), a gasket (7) is arranged on one side of the pump shaft (2) corresponding to the mechanical seal (6), the gland (3), the pump body (1), the gland (3), the mechanical seal (6) and the pump body (1) are connected with the bearing (5) through an auxiliary pressing piece (8), the auxiliary pressing piece (8) is formed by integrally a middle shaft tube (801), a front shaft tube (802), an extension plate (803) and a rear limiting tube (804), the front shaft tube (802), the middle shaft tube (801), the extension plate (803) and the rear limiting tube (804) are connected in sequence from left, the inside of well sleeve pipe (801) is equipped with and is used for inlaying machine seal chamber (9) of establishing mechanical seal (6), the inside of preceding central siphon (802) is equipped with crosses axle channel (10) with pump shaft (2) looks adaptation, the inside of back spacing pipe (804) is equipped with spacing passageway (11) with bearing (5) looks adaptation, be equipped with first sealing washer (12) between the connection terminal surface of gland (3) and preceding central siphon (802), be equipped with second sealing washer (13) between the connection terminal surface of back spacing pipe (804) and the pump body (1), be equipped with third sealing washer (14) between the connection terminal surface of the pump body (1) and gland (3).

2. A hydraulic shaft seal according to claim 1 wherein: the pump is characterized in that a convex ring is arranged on the connecting end face of the gland (3) and the pump body (1), a ring groove matched with the convex ring is arranged on the connecting end face of the pump body (1) and the gland (3), and the bottom of the convex ring is abutted to the end face of the extension plate (803) far away from the middle sleeve (801).

3. A hydraulic shaft seal according to claim 1 wherein: the diameter of the shaft passing channel (10) is larger than that of the mechanical seal cavity (9), and the diameter of the mechanical seal cavity (9) is larger than that of the limiting channel (11).

4. A hydraulic shaft seal according to claim 1 wherein: and the first sealing ring (12), the second sealing ring (13) and the third sealing ring (14) are all polytetrafluoroethylene O-shaped sealing rings.