CN213929452U

CN213929452U - Liquid-blocking ring composite sealing structure for claw pump

Info

Publication number: CN213929452U
Application number: CN202022942266.1U
Authority: CN
Inventors: 侯宁; 王刚; 谢新平
Original assignee: Shandong Yining Environmental Protection Technology Co ltd
Current assignee: Shandong Yining Environmental Protection Technology Co ltd
Priority date: 2020-12-07
Filing date: 2020-12-07
Publication date: 2021-08-10
Anticipated expiration: 2030-12-07

Abstract

The utility model relates to a hinder liquid ring composite seal structure for claw pump, including the driving shaft, driven shaft and bearing plate, the below of bearing plate is equipped with the oil tank, driving shaft and driven shaft pass through the bearing and rotate and install on the bearing plate, the top of bearing plate is equipped with sealing base, the sealing base top is equipped with the pump chamber, the driving shaft of bearing top, all be equipped with the skeleton oil blanket between driven shaft and the bearing plate, the skeleton oil blanket top is pushed down through sealing base, be equipped with the mounting groove on the sealing base in the driving shaft and the driven shaft outside, interference fit installs in the mounting groove and hinders the liquid ring, the top that hinders the liquid ring is in the top at sealing base top, equal interference fit cover has the sealing ring on driving shaft and the driven shaft. The utility model discloses thereby prevent pump intracavity liquid to get into the oil tank through transmission shaft and seal base's clearance because of hindering liquid ring height seal base, utilize multiple sealed key elements such as difference in height clearance, because of it belongs to non-contact sealed, have excellent in use effect, longe-lived, advantages such as non-maintaining.

Description

Liquid-blocking ring composite sealing structure for claw pump

Technical Field

The utility model belongs to the technical field of claw pump is sealed, concretely relates to hinder liquid ring composite seal structure for claw pump.

Background

Along with the large amount of applications of claw pump in chemical production, the seal structure of claw pump also receives huge challenge, for the liquid in the discharge pump of more smooth, the claw pump adopts vertical structure basically, adopt skeleton oil blanket or mechanical seal to seal between the work pump chamber of claw pump and the oil tank basically, the sealed effect of skeleton oil blanket is not good, mechanical seal uses very easily to damage and change just need tear the pump open under this kind of complicated operating mode environment, because of the oil tank is in the lower part of working chamber, sealed damage back, pump intracavity and medium and liquid get into the oil tank, lead to bearing gear etc. to damage.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a hinder liquid ring composite seal structure for claw pump solves and adopts skeleton oil blanket or mechanical seal to seal basically between work pump chamber and the oil tank of present claw pump, and the sealed not good problem of effect of skeleton oil blanket.

The utility model relates to a liquid blocking ring composite sealing structure for a claw pump, which comprises a driving shaft, a driven shaft and a bearing plate, wherein an oil tank is arranged below the bearing plate, the driving shaft and the driven shaft are rotatably arranged on the bearing plate through a bearing, a sealing base is arranged above the bearing plate, a pump cavity is arranged above the sealing base, framework oil seals are respectively arranged between the driving shaft and the driven shaft above the bearing and the bearing plate, the top of the framework oil seal is pressed through the sealing base, the upper ends of the driving shaft and the driven shaft both pass through the sealing base and extend into the pump cavity, a mounting groove is arranged on the sealing base outside the driving shaft and the driven shaft, a liquid blocking ring is arranged in the mounting groove in an interference fit manner, the top of the liquid blocking ring is arranged above the top of the sealing base, sealing rings are respectively sleeved on the driving shaft and the driven shaft in an interference fit manner, the bottom of the sealing rings is supported through shaft shoulders, and a gap exists between the sealing rings and the liquid blocking ring, the bottom of the sealing ring is positioned above the bottom of the liquid-blocking ring. The top of the liquid blocking ring is higher than that of the sealing base, and the plane of the top of the sealing base is not less than 5 mm.

The top of the liquid resistance ring is provided with a circular flanging which turns outwards, a gap is reserved between the bottom of the circular flanging and the top of the liquid resistance ring, the outer side edge of the circular flanging is provided with a downward turning edge, and a gap is reserved between the inner side wall of the turning edge and the outer side wall of the top of the liquid resistance ring. The labyrinth seal is formed, so that liquid on the transmission shaft can be prevented from sliding into the sealing ring from the upper part, and the liquid is further prevented from entering the oil tank.

And the driving shaft and the driven shaft at the top of the circular flanging are both provided with annular clamping grooves, and limiting clamping rings are arranged in the annular clamping grooves. The sealing sleeve is prevented from slipping.

The limiting snap ring is C-shaped and convenient to detach, and a plurality of sealing rings are arranged between the outer wall of the sealing ring and the inner wall of the liquid blocking ring along the vertical direction.

Compared with the prior art, the utility model has the advantages of:

because the liquid blocking ring is higher than the sealing base, the liquid in the pump cavity is prevented from entering the oil tank through the gap between the transmission shaft and the sealing base, the structure ingeniously utilizes various sealing elements such as a height difference gap and the like, and the structure belongs to non-contact sealing, so that the oil tank has the advantages of good use effect, long service life, no maintenance and the like.

Drawings

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

fig. 2 is a schematic structural diagram of embodiment 2 of the present invention;

FIG. 3 is an enlarged schematic view of the structure at A in FIG. 2;

in the figure: 1. a pump chamber; 2, driving a shaft; 3. a seal ring; 4. a liquid blocking ring; 5. framework oil seal; 6. a driven shaft; 7. a bearing; 8. a bearing plate; 9. sealing the base; 10. a seal ring; 11. a limit snap ring; 12. circular flanging; 13. and (5) turning over the edges.

Detailed Description

The following describes the embodiments of the present invention in further detail with reference to the accompanying drawings.

Embodiment 1, as shown in fig. 1, the utility model relates to a liquid-blocking ring composite sealing structure for a claw pump, which comprises a driving shaft 2, a driven shaft 6 and a bearing plate 8, an oil tank is arranged below the bearing plate 8, the driving shaft 2 and the driven shaft 6 are rotatably arranged on the bearing plate 8 through a bearing 7, a sealing base 9 is arranged above the bearing plate 8, a pump cavity 1 is arranged above the sealing base 9, a framework oil seal 5 is arranged between the driving shaft 2 and the driven shaft 6 above the bearing 7 and the bearing plate 8, the top of the framework oil seal 5 is pressed through the sealing base 9, the upper ends of the driving shaft 2 and the driven shaft 6 both penetrate through the sealing base 9 and extend into the pump cavity 1, mounting grooves are arranged on the sealing base 9 outside the driving shaft 2 and the driven shaft 6, a liquid-blocking ring 4 is arranged in an interference fit manner in the mounting grooves, the top of the liquid-blocking ring 4 is arranged above the top of the sealing base 9, a sealing ring 3 is sleeved on the driving shaft 2 and the driven shaft 6 in an interference fit manner, the bottom of the sealing ring 3 is supported by a shaft shoulder, and the bottom of the sealing ring 3 is positioned above the bottom of the liquid blocking ring 4.

The working principle is as follows: when the transmission shaft works, the liquid blocking ring 4 is higher than the sealing base 9, so that liquid in the pump cavity 1 is prevented from entering the oil tank through a gap between the transmission shaft and the sealing base 9.

Embodiment 2, as shown in fig. 2 and 3, on the basis of embodiment 1, the top of the liquid-blocking ring 4 is provided with a circular flange 12 which turns outwards, a gap is left between the bottom of the circular flange 12 and the top of the liquid-blocking ring 4, the outer side edge of the circular flange 12 is provided with a downward turned edge 13, and a gap is left between the inner side wall of the turned edge 13 and the outer side wall of the top of the liquid-blocking ring 4.

And the driving shaft 2 and the driven shaft 6 at the top of the circular flanging 12 are both provided with annular clamping grooves, and limiting clamping rings 11 are arranged in the annular clamping grooves.

The limiting snap ring 11 is of a C shape, and a plurality of sealing rings 10 are arranged between the outer wall of the sealing ring 3 and the inner wall of the liquid blocking ring 4 along the vertical direction.

When the transmission shaft works, the tops of the sealing ring 3 and the liquid blocking ring 4 can form labyrinth seal, so that liquid on the transmission shaft can be prevented from sliding off from the upper part and entering the sealing ring, and further prevented from entering an oil tank.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

In the description of the present invention, the terms "inside", "outside", "longitudinal", "lateral", "up", "down", "top", "bottom", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description of the present invention rather than requiring the present invention to be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention.

Claims

1. The utility model provides a hinder liquid ring composite seal structure for claw pump, includes driving shaft (2), driven shaft (6) and bearing plate (8), and the below of bearing plate (8) is equipped with the oil tank, and driving shaft (2) and driven shaft (6) are installed on bearing plate (8) through bearing (7) rotation, and the top of bearing plate (8) is equipped with seal base (9), and seal base (9) top is equipped with pump chamber (1), its characterized in that: driving shaft (2) of bearing (7) top, all be equipped with skeleton oil blanket (5) between driven shaft (6) and bearing plate (8), skeleton oil blanket (5) top is pushed down through sealing base (9), driving shaft (2) and driven shaft (6) upper end all pass sealing base (9) and stretch into in pump chamber (1), be equipped with the mounting groove on sealing base (9) in driving shaft (2) and driven shaft (6) outside, interference fit installs in the mounting groove and hinders liquid ring (4), the top that hinders liquid ring (4) is in the top at sealing base (9) top, equal interference fit cover has sealing ring (3) on driving shaft (2) and driven shaft (6), the bottom of sealing ring (3) is passed through the shaft shoulder and is supported, the bottom of sealing ring (3) is in the top that hinders liquid ring (4) bottom.

2. The composite sealing structure of the liquid blocking ring for the claw pump according to claim 1, characterized in that: the top of the liquid blocking ring (4) is provided with a circular flanging (12) which turns outwards, a gap is reserved between the bottom of the circular flanging (12) and the top of the liquid blocking ring (4), the outer side edge of the circular flanging (12) is provided with a downward turning edge (13), and a gap is reserved between the inner side wall of the turning edge (13) and the outer side wall of the top of the liquid blocking ring (4).

3. The composite sealing structure of the liquid blocking ring for the claw pump according to claim 2, characterized in that: and the driving shaft (2) and the driven shaft (6) at the top of the circular flanging (12) are both provided with annular clamping grooves, and limiting clamping rings (11) are arranged in the annular clamping grooves.

4. The composite sealing structure of the liquid blocking ring for the claw pump according to claim 3, wherein: the limiting snap ring (11) is C-shaped, and a plurality of sealing rings (10) are arranged between the outer wall of the sealing ring (3) and the inner wall of the liquid blocking ring (4) along the vertical direction.