CN215292994U

CN215292994U - Spiral packing seal structure

Info

Publication number: CN215292994U
Application number: CN202120877216.1U
Authority: CN
Inventors: 李成; 何敏; 王磊; 尹博浩
Original assignee: Shanghai Kaiquan Pump Group Co Ltd
Current assignee: Shanghai Kaiquan Pump Group Co Ltd
Priority date: 2021-04-26
Filing date: 2021-04-26
Publication date: 2021-12-24
Anticipated expiration: 2031-04-26

Abstract

The utility model relates to a spiral packing sealing structure, which is arranged at the sealing position between a pump shaft and a pump cover and comprises an end ring, a first packing, a packing ring, a second packing and a packing gland; one side of the end ring, which is far away from the first filler, is of a plane structure, and the other side of the end ring, which is close to the first filler, is of a semi-spiral structure; both sides of the packing ring are of spiral structures; one side of the packing gland close to the second packing is of a semi-spiral structure, and the other side of the packing gland is of a plane structure; the first packing is positioned between the end ring and the packing ring; the second packing is located between the packing ring and the packing gland. The utility model discloses changing the structure of original packing segmentation installation into whole root packing, effectively avoiding the injection that segmentation filler overlap joint caused to reveal, and the automatic compensation of filler wearing and tearing to reduce the sealed leakage quantity that lets out of packing, prolong filler life, simultaneously can be more convenient load and change the filler.

Description

Spiral packing seal structure

Technical Field

The utility model relates to a seal structure, concretely relates to reduce the sealed leakage quantity that lets out of packing, extension filler life, simultaneously can be more convenient fill and change the spiral packing seal structure of packing.

Background

In the field of fluid mechanics, the sealing system is an inescapable structure, and through countless ancestor's efforts, the sealing structures used at present mainly have mechanical seals, packing seals, dynamic seals, floating seals, and the like.

At present, mechanical seals are most commonly applied to commercial clean water pumps, the sealing effect is the best, but the structure is complex, the medium needs clean water or similar clean water occasions, the service life is generally 1-2 years, the cost is high, a bearing needs to be disassembled during replacement, the general bearing is in interference fit or transition fit, the service life of the bearing is reduced after repeated disassembly and assembly, and whether the assembly and disassembly can meet the original assembly requirements or not is not considered.

Although the power seal can be suitable for various working conditions, the power seal can only play a role in sealing by supplying power to the prime motor, and cannot play a role in sealing after stopping (or stopping the prime motor), so that a large amount of energy is mainly consumed.

The floating seal is a clearance seal, which does not consume much energy as compared to a dynamic seal, and which, like a dynamic seal, does not provide a sealing effect after shutdown (or after the prime mover is stopped).

The packing sealing is to seal a medium by generating a water film between the packing and the shaft, the sealing principle of the packing sealing is consistent with that of mechanical sealing, and the difference is that the packing sealing is made of materials which are generally lower than that of the mechanical sealing and mainly comprise ramie, rubber asbestos, oil-immersed asbestos, tetrafluoro and the like. The replacement of the packing seal does not require the disassembly of the bearing. The traditional filler sealing is generally 4-5, each ring is an independent coiled ring, the end of the traditional filler sealing needs to be lapped, the lapping condition is good or bad according to the shape of the end, if the lapping is not good, the jet leakage can occur, if the lapping position of every two adjacent filler joints needs to be staggered, the jet leakage can not be avoided, and meanwhile, the sealing performance is also reduced even if the lapping is good. In addition, after the filler is abraded, the better sealing performance can be achieved only by screwing down the gland bolt, and the automatic compensation sealing function is not achieved. Compared with the packing sealing structure, the packing sealing structure is mainly simple in structure and easy to process.

SUMMERY OF THE UTILITY MODEL

In view of the above, an object of the present invention is to provide a spiral packing structure that reduces the leakage amount of packing seal, prolongs the service life of packing, and can more conveniently load and replace the packing at the same time.

The utility model discloses a solve above-mentioned technical problem through following technical scheme: a spiral packing seal structure installed at a seal between a pump shaft and a pump cover, the spiral packing seal structure comprising: the end ring, first filler, filler ring, second filler, packing gland.

One side of the end ring, which is far away from the first filler, is of a plane structure, and the other side of the end ring, which is close to the first filler, is of a semi-spiral structure; both sides of the packing ring are of spiral structures; one side of the packing gland close to the second packing is of a semi-spiral structure, and the other side of the packing gland is of a plane structure.

The first packing is positioned between the end ring and the packing ring; the second packing is located between the packing ring and the packing gland.

In a specific embodiment of the present invention, one side of the planar structure of the end ring is fixed to the pump cover; one side of the planar structure of the packing gland is fixed on the pump cover.

In the embodiment of the present invention, one side of the planar structure of the end ring is fixed on the pump cover through a cylindrical pin; one side of the plane structure of the packing gland is fixed on the pump cover by adopting a gland nut.

In the specific embodiment of the present invention, the first filler is two full circles of the whole disc, the second filler is three full circles of the whole disc, and the two fillers are all of the whole structure and are arranged spirally.

In the specific embodiment of the utility model, the gland is the casting HT250 structure, and inboard and filler cooperation position adopt helical structure, have screw thread ending boss, and the outside is planar structure.

The utility model discloses an among the concrete implementation example, the drilled packing ring adopts helical structure, and the spiral direction is unanimous with the drilled packing end links, and both ends all have the halfpace face, and the terminal surface is followed with interior bevel connection design, and inner circle and outer lane all design have a water groove to through punching with inside and outside water groove intercommunication that crosses.

In the embodiment of the present invention, the packing gland is fixedly mounted on the pump cover through the gland nut.

The utility model discloses an actively advance the effect and lie in: the utility model provides a spiral packing structure has following advantage: the utility model discloses changing the structure of original packing segmentation installation into whole root packing, effectively avoiding the injection that segmentation filler overlap joint caused to reveal, and the automatic compensation of filler wearing and tearing to reduce the sealed leakage quantity that lets out of packing, prolong filler life, simultaneously can be more convenient load and change the filler.

The utility model discloses the structure to pump cover processing, gland, drilled packing ring has improved, and the outward appearance does not receive any influence. And meanwhile, a filler end ring is added, a pin hole is added on the pump body, and the filler end ring is fixed with the pump cover through a cylindrical pin. The packing end ring, the packing ring and the packing gland have directionality (related to the rotation direction of the shaft), and can be installed and used in a specified direction to exert more ideal effects.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention.

Fig. 2-1 is a front view of a structural schematic of an end ring of the present invention.

Fig. 2-2 are partial cross-sectional views of end rings of the present invention.

Fig. 3-1 is a front view of the packing ring of the present invention.

Fig. 3-2 is a left side view of the schematic structural diagram of the packing ring of the present invention.

Fig. 3-3 are partial cross-sectional views of the packing ring of the present invention.

Fig. 4-1 is a front view of the packing gland of the present invention.

Figure 4-2 is a partial cross-sectional view of the packing gland of the present invention.

The utility model discloses the name that well reference numeral corresponds:

the pump cover comprises a pump cover 1, a cylindrical pin 2, an end ring 3, a first packing 4, a packing ring 5, a second packing 6, a packing gland 7, a gland nut 8 and a nut hole 9; an aperture 501; a thread ending boss 701 and a planar structure 702.

Detailed Description

The following provides a preferred embodiment of the present invention with reference to the accompanying drawings to explain the technical solutions of the present invention in detail.

Fig. 1 is a schematic view of the overall structure of the present invention, as shown in fig. 1: the utility model provides a pair of spiral packing structure, this spiral packing structure install the sealed department between pump shaft and pump cover, and this spiral packing structure includes: the end ring 3, the first packing 4, the packing ring 5, the second packing 6 and the packing gland 7.

Fig. 2-1 is a front view of a schematic structural view of an end ring of the present invention, and fig. 2-2 is a partial sectional view of the end ring of the present invention, as shown in the above-mentioned figures: the side of the end ring 3 far away from the first filler 4 is a plane structure, and the other side is close to the first filler 4 and is a semi-spiral structure.

Fig. 3-1 is a front view of the structural schematic diagram of the packing ring of the present invention, fig. 3-2 is a left side view of the structural schematic diagram of the packing ring of the present invention, fig. 3-3 is a partial cross-sectional view of the packing ring of the present invention, as shown in the above-mentioned figures: both sides of the packing ring 5 are of spiral structures; one side of the packing gland 7 close to the second packing 6 is of a semi-spiral structure, and the other side of the packing gland is of a plane structure; the first packing 4 is located between the end ring 3 and the packing ring 5; a second packing 6 is located between the packing ring 5 and the packing gland 7.

Fig. 4-1 is a front view of the structural schematic diagram of the packing gland of the present invention, and fig. 4-2 is a partial cross-sectional view of the packing gland of the present invention, as shown in the above-mentioned figure: in a specific implementation process, one side of the planar structure of the end ring 3 is fixed on the pump cover 1; one side of the planar structure of the packing gland 7 is fixed on the pump cover 1. In the illustration of fig. 1 given in the present invention, one side of the planar structure of the end ring 3 is fixed on the pump cover 1 through the cylindrical pin 2; one side of the planar structure of the packing gland 7 is fixed on the pump cover 1 by a gland nut 8, and referring to fig. 4-1, the packing gland 7 is provided with a nut hole 9 through which the gland nut 8 passes.

The utility model discloses an in the manufacturing process, for judging whether correct in end links, drilled packing ring, gland's structure, can fold end links, drilled packing ring, gland together, can mesh into the cylinder shape.

When the screwing direction is changed, the spiral directions of the end ring, the packing ring and the packing gland are opposite.

The specification number will vary with the shaft diameter, and the relevant size proportion will also vary with the proportion.

The utility model discloses an in the concrete manufacture, this spiral packing seal end ring structure, available steel sheet preparation also can adopt the foundry goods, and one end is the plane, and makes two pinholes on the plane, utilizes the round pin to be connected end links and pump cover and prevents that the end links from rotating, and the other side of end links adopts the half-spiral shape, and in-band inclination compact structure, can prevent effectively that the packing from rotating along with week, and can play the effect to packing self-tightening.

The utility model provides a packing ring structure adopts foundry goods HT250, adopts helical structure, and the screw direction is unanimous with the end links that pack, and both ends all have the step face, and the terminal surface is along with interior bevel connection design, and inner circle and outer lane all design have water slot to through punching (aperture 501 in figures 3-2 and 3-3) with inside and outside slot intercommunication, thereby effectively guarantee the lubrication of packing.

The utility model discloses well gland 7 adopts foundry goods HT250, and inboard and filler cooperation position adopt helical structure, have screw thread ending boss 701, outside planar structure 702, and is as good as with traditional gland.

The utility model provides a pack and adopt two sections packings, the drilled packing ring is close to and overflows liquid one side (inboard) and adopts two whole circles of packings of whole root dish, and the drilled packing ring outside adopts three whole circles of packings of whole root dish, and the packing is whole root structure, is the spiral and arranges, according to the soon of design, cooperation gland, drilled packing ring prevent to pack report the axle and skid along with the whole rotatory phenomenon of axle with the outer wall of packing.

The utility model discloses the sealed principle utilizes the spring forward rotation to tighten up, and the reversal rotation expands the principle, and its packing is equivalent to a spring in the structure, and all limits the motion at its outer lane and inner circle, only allows it to axial motion to play the automatic compensation effect.

In order to solve the problem of traditional packing, the utility model discloses the structure to pump cover processing, gland, drilled packing ring has improved, and the outward appearance does not receive any influence. And meanwhile, a filler end ring is added, a pin hole is added on the pump body, and the filler end ring is fixed with the pump cover through a cylindrical pin. The packing end ring, the packing ring and the packing gland have directionality (related to the rotation direction of the shaft), and can be installed and used in a specified direction to exert more ideal effects.

When the water pump is running, when the water pump shaft rotates, the filler is driven to rotate, the end face of the filler is positioned with the filler gland, the filler ring and the end ring and cannot rotate, and the filler is of a spiral structure, so that the filler generates a screwing and compressing force, and leakage is blocked. When the operation in-process, after the filler wearing and tearing, because of there being the existence of this power, the filler automatic compensation compresses, can lead to even one side to appear the space when wearing and tearing are serious, nevertheless because the filler automatic compensation, consequently can not produce big leakage quantity yet, even if part with require to revolve to inconsistent also can have certain compensation to leak the effect, whole all can be better than traditional structure.

In the specific implementation process, when filling and replacing the filler, the filler can be directly pressed in, and then the filler ring and the filler gland are rotated, so that the filler can be quickly and accurately filled in place without considering whether the interface position is aligned and attached.

When the rotation direction of the water pump is changed, the end ring, the packing ring and the packing gland are required to adopt different rotation directions, the options of a series of products are generally fixed, and the double-suction pump can adopt the mode that left and right side sealing assemblies are exchanged.

The basic principles and the main features of the invention and the advantages of the invention have been shown and described above. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are intended to illustrate the principles of the invention, and that various changes and modifications may be made without departing from the spirit and scope of the invention, which is defined by the appended claims and their equivalents.

Claims

1. A spiral packing seal structure characterized in that: this spiral packing seal structure installs the sealed department between pump shaft and pump cover, spiral packing seal structure includes: the end ring, the first packing, the packing ring, the second packing and the packing gland are arranged;

one side of the end ring, which is far away from the first filler, is of a plane structure, and the other side of the end ring, which is close to the first filler, is of a semi-spiral structure; both sides of the packing ring are of spiral structures; one side of the packing gland close to the second packing is of a semi-spiral structure, and the other side of the packing gland is of a plane structure;

2. The spiral packing seal configuration of claim 1, wherein: one side of the planar structure of the end ring is fixed on the pump cover; one side of the planar structure of the packing gland is fixed on the pump cover.

3. The spiral packing seal configuration of claim 2, wherein: one side of the planar structure of the end ring is fixed on the pump cover through a cylindrical pin; one side of the plane structure of the packing gland is fixed on the pump cover by adopting a gland nut.

4. The spiral packing seal configuration of claim 1, wherein: the first filler is a whole disc of two whole circles of fillers, the second filler is a whole disc of three whole circles of fillers, and the fillers at two ends are of a whole structure and are spirally arranged.

5. The spiral packing seal configuration of claim 1, wherein: the packing gland is of a casting HT250 structure, the part of the inner side matched with the packing adopts a spiral structure, a boss with a thread ending is arranged, and the outer side is of a plane structure.

6. The spiral packing seal configuration of claim 1, wherein: the packing ring adopts a spiral structure, the spiral direction is consistent with that of the packing end ring, the two ends of the packing ring are provided with step surfaces, the end surfaces are designed with inner oblique ports, the inner ring and the outer ring are provided with water passing grooves, and the inner water passing groove and the outer water passing groove are communicated through punching.

7. The spiral packing seal configuration of claim 1, wherein: the packing gland is fixedly arranged on the pump cover through a gland nut.