阅读说明：本技术 一种转子泵轴密封装置 (Rotor pump shaft sealing device ) 是由 谭在良 于 2021-01-07 设计创作，主要内容包括：提供一种适用于输送易起皮结块物料或含有纤维物料的转子泵的轴密封装置,包括相互贴合的动环与静环,动环贴合面侧的环外周或/和环内圈开设有缺口(3),或静环贴合面侧的环外周或/和环内圈开设有缺口(3),或动环贴合面侧的环外周或/和环内圈与静环贴合面侧的环外周或/和环内圈分别开设有缺口(3)；使动环与静环之间相互形成剪切刀,可将皮结块或纤维切断切碎,可有效的避免皮结块或纤维进入相互贴合的动环与静环之间,而引发的动静环贴合面发热与物料泄漏现象,从而显著地提升了转子泵的轴密封性能与轴密封的使用寿命。(The shaft sealing device comprises a movable ring and a static ring which are mutually attached, wherein a gap (3) is formed in the periphery or/and the inner ring of the ring on the attaching surface side of the movable ring, or a gap (3) is formed in the periphery or/and the inner ring of the ring on the attaching surface side of the static ring, or gaps (3) are respectively formed in the periphery or/and the inner ring of the ring on the attaching surface side of the movable ring and the periphery or/and the inner ring of the ring on the attaching surface side of the static ring; make and form each other between rotating ring and the quiet ring and cut the sword, can cut off the skin caking or the fibre cuts up, can effectually avoid the skin caking or the fibre to get into between the rotating ring and the quiet ring of laminating each other, and the sound ring binding face that causes generates heat and the material leaks the phenomenon to the axle sealing performance of impeller pump and the sealed life of axle have been showing to be promoted.)

1. The utility model provides a shaft seal device of impeller pump, includes rotating ring (1) and quiet ring (2) of laminating each other, its characterized in that utilizes the laminating relation each other of rotating ring (1) and quiet ring (2) and the rotating relation of the relative quiet ring (2) of rotating ring (1) be provided with shearing mechanism between rotating ring (1) and quiet ring (2).

2. The shaft seal device of a rotary pump according to claim 1, wherein said shearing mechanism is arranged such that: the outer ring periphery or/and the inner ring of the attaching surface side of the movable ring (1) is/are provided with a notch (3), or the outer ring periphery or/and the inner ring of the attaching surface side of the static ring (2) is/are provided with a notch (3), or the outer ring periphery or/and the inner ring of the attaching surface side of the movable ring (1) and the outer ring periphery or/and the inner ring of the attaching surface side of the static ring (2) are/is provided with a notch (3).

3. The shaft seal of a rotary pump according to claim 2, characterized in that the gap (3) is a constant cross-section gap (3) provided laterally outside the abutment surface of the driven ring (1) or the stationary ring (2).

4. A shaft seal of a rotor pump according to claim 3, characterized in that the gap (3) is a groove gap (3) opening to a part of the wall thickness of the rotating ring (1) or the stationary ring (2).

5. A shaft seal of a rotor pump according to claim 3, characterized in that the gap (3) is a through-gap (3) extending through the wall thickness of the rotor ring (1) or the stator ring (2).

6. A shaft seal of a rotor pump according to claim 3, characterized in that the notch (3) is a circular arc-shaped notch (3) having a circular arc-shaped cross section.

7. A shaft seal of a rotor pump according to claim 3, characterized in that the notch (3) is a triangular notch (3) having a triangular cross section.

8. The shaft seal of a rotary pump according to claim 3, characterized in that the notch (3) is a quadrangular notch (3) having a quadrangular cross section.

9. A shaft sealing device of a rotor pump according to claim 3, characterized in that the notches (3) are arranged in 2 to 8 numbers evenly distributed along the ring periphery or/and the ring inner periphery of the moving ring (1) or the stationary ring (2).

10. The shaft seal of a rotor pump according to claim 9, characterized in that the notches (3) are distributed offset from each other around the outer circumference of the rotor ring (1) or the stator ring (2) and the inner circumference of the ring.

Technical Field

The invention relates to a rotor pump, in particular to a shaft sealing device thereof.

Background

The rotor pump is mainly used for conveying fluid liquid materials. The rotor pump is also called a colloid pump, an impeller pump, a universal delivery pump and the like, and the impeller of the rotor pump is shaped like a cam and is also called a cam pump, and the rotor pump belongs to a displacement pump; typically a double rotor. The rotor pump achieves the purpose of conveying fluid materials by means of periodic conversion of a plurality of fixed volume conveying units in a working cavity. Usually, a pair of synchronous gears are driven by a motor to drive a main shaft and an auxiliary shaft, and a double rotor synchronously rotates in the opposite direction under the driving of the main shaft and the auxiliary shaft respectively to change the volume of a pump, so that higher vacuum degree and discharge pressure are formed; the inlet is a low pressure region and the outlet is a high pressure region. Because the material needs to bear higher pressure at the output end of the rotor pump when the rotor pump works, the material is easy to leak from the rotating shaft. In order to avoid the leakage of fluid materials, the shaft seal of the rotor pump is very important, and along with the development of the technology of the rotor pump, the shaft seal of the rotor pump is always one of the key technologies. It is a long-sought goal of those skilled in the art to improve the shaft sealing performance of a rotary pump and the service life of the shaft seal.

The materials with high viscosity are easy to peel and agglomerate, and some materials can peel and agglomerate even if the viscosity is not high, so that the leather agglomerates are formed. Some materials contain fibers and some contain particulate impurities. The existing rotor pump can not leak when conveying common pure materials, but the inter-shaft leakage phenomenon can occur when conveying materials containing skin caking or fiber or particle impurities, the adhesion surfaces of the dynamic and static rings can also generate heat, and the dynamic and static rings are also easy to damage. Since the advent of the rotary pump, the rotary pumps manufactured in various countries have had such a drawback for a long time. Therefore, it can be said that this technical problem is always puzzled by those skilled in the art of various countries and has not been solved.

Earlier, due to the limited scale of related industries, the requirement of delivering materials containing skin lumps or fiber or particle impurities is met only occasionally, the social requirement on environmental protection is not high, and the technical problem is not very outstanding. In recent 10 years, with the continuous expansion of related industrial scale, the demand of conveying materials containing skin caking or fiber or particle impurities is greatly increased, the social requirement on environmental protection is continuously increased, and zero leakage is required for industrial pumps, so that the technical problem is more prominent and urgent to solve.

Disclosure of Invention

The inventor finds that the same rotor pump cannot leak when pure materials are conveyed, the inter-shaft leakage phenomenon can occur when materials containing leather caking or fiber or particle impurities are conveyed, the bonding surfaces of the moving ring and the static ring can generate heat, and the moving ring and the static ring are easy to damage. This phenomenon has attracted the attention of the present inventors, but it is not easy to find out the reason. After long-term field observation and later disassembly analysis research for more than 6 years, the inventor finally discovers that the leakage is generated between the driven ring and the static ring. Furthermore, the cause of the leakage is analyzed and studied, and the specific cause of the leakage is finally clarified. This is now explained as follows: as shown in fig. 1, in the sealing device for a rotor pump shaft, a moving ring and a stationary ring are attached to each other to form a friction pair. The movable ring and the static ring are mutually attached and passively formed under the action of the spring, and when the rotor pump runs, the spring is in continuous expansion and contraction along with the change of pressure in the mechanical seal cavity, so that the movable ring and the static ring are mutually attached and not always closely attached, but are in a continuous instant separation state, namely, a dynamic close-open-close-open state of a micro gap can be continuously formed instantly. The size and the physical property of the movable ring and the static ring are enough to form destructive leather lumps or length fibers, and the fibers can just fall into the instantaneously formed micro gaps, and in more cases, after part of the fibers occupies the instantaneously formed micro gaps, the running movable ring and the static ring friction pair also drive the other parts to be dragged until the whole part or the whole section of the fibers enters the space between the movable ring and the static ring, so that the movable ring and the static ring to be attached are continuously separated to form the gaps, and the materials can flow out from the gaps among shafts, thereby causing the leakage phenomenon of the materials. The present inventors have thus made the present invention.

The technical problem to be solved by the invention is to provide a scheme of a shaft sealing device of a rotor pump, which is suitable for conveying materials easy to peel and agglomerate or materials containing fiber or particle impurities, aiming at the technical current situation.

The technical scheme adopted by the shaft sealing device of the rotor pump is as follows:

the utility model provides a shaft seal device of impeller pump, is including the rotating ring and the quiet ring of laminating each other, its characterized in that utilizes the laminating relation each other of rotating ring and quiet ring and the rotating relation of the relative quiet ring of rotating ring be provided with shearing mechanism between rotating ring and the quiet ring.

The following is a further embodiment of the shaft seal of the rotor pump according to the invention:

the shearing mechanism is arranged as follows: the outer ring periphery or/and the inner ring of the movable ring attaching surface side is/are provided with a notch, or the outer ring periphery or/and the inner ring of the static ring attaching surface side is/are provided with a notch, or the outer ring periphery or/and the inner ring of the movable ring attaching surface side and the outer ring periphery or/and the inner ring of the static ring attaching surface side are/is provided with a notch respectively.

The notch is an equal-section notch formed in the outer side of the attaching surface of the driven ring or the static ring.

The notch is a groove notch which is arranged at the wall thickness of the movable ring or the static ring.

The notch is a through notch penetrating through the wall thickness of the movable ring or the static ring.

The notch is an arc-shaped notch with a circular arc-shaped section.

The notch is a triangular notch with a triangular section.

The notch is a quadrilateral notch with a quadrilateral cross section.

The breach sets up 3 to 6 that are evenly distributed along the ring periphery or/and the ring inner circle circumference of rotating ring or quiet ring.

The gaps are arranged to be 4 uniformly distributed along the periphery of the movable ring or the static ring or/and the periphery of the inner ring.

The notches are uniformly distributed on the periphery of the movable ring or the static ring and the periphery of the inner ring in a staggered manner.

The invention discloses a rotor pump shaft sealing device which comprises a movable ring and a stationary ring which are attached to each other, wherein the movable ring rotates relative to the stationary ring in an attaching mode, and a shearing mechanism is arranged between the movable ring and the stationary ring. The shearing mechanism can be realized by arranging a notch on the periphery of the ring or/and the inner ring of the ring on the joint surface side of the movable ring or the static ring, so that a shearing cutter is formed between the movable ring and the static ring, and leather lumps or fibers around the shearing cutter can be cut and chopped. The concrete situation is as follows: the entered or notched skin lumps or fibers are immediately cut off and chopped; or if leather lumps or fibers just enter the micro gaps formed instantly, the fibers are cut off immediately; and is thrown away to the periphery by the centrifugal force of the rotating ring. The notch also has the function of heat dissipation. Practical use proves that leather lumps or fibers with damage effects can be effectively prevented from entering between the movable ring and the static ring which are mutually attached, and the phenomena of heating and material leakage of the attaching surfaces of the movable ring and the static ring are caused, so that the shaft sealing performance of the rotor pump and the service life of shaft sealing are remarkably improved. The invention skillfully utilizes the joint and rotation relation of the movable ring relative to the static ring, and adopts a simple and feasible technical means of arranging the notch on the periphery of the ring or/and the inner ring of the movable ring or the joint surface side of the static ring, thereby not increasing any part and hardly increasing the manufacturing cost and effectively solving the technical problem which can not be solved for a long time in the industry.

The rotor pump shaft sealing device of the invention not only can not leak when conveying common pure materials, but also can not leak between shafts when conveying materials containing skin caking or fiber or particle impurities, and the bonding surfaces of the moving and static rings can not generate heat, and the moving and static rings are not easy to damage. The shaft sealing performance of the rotor pump and the service life of the shaft seal are greatly improved.

Drawings

Fig. 1 is a schematic view of a shaft seal of a rotary pump of this type.

Fig. 2 is a schematic view of a conventional rotating ring.

FIG. 3 is a schematic perspective view of a movable ring with a circular arc-shaped notch formed on the outer periphery thereof according to the present invention, showing the binding surface thereof.

FIG. 4 is a schematic perspective view of the rotating ring with a circular arc notch at the outer periphery of the ring according to the present invention showing the back side thereof.

FIG. 5 is a schematic view of a movable ring with an asymmetric triangular notch formed on the outer periphery of the movable ring, showing the binding surface of the movable ring.

Fig. 6 is a schematic perspective view of the movable ring with symmetrical triangular notches on the periphery of the ring, showing the binding surface of the movable ring.

Fig. 7 is a schematic perspective view of a movable ring with a quadrilateral notch formed on the outer periphery of the ring, showing the binding surface thereof.

Fig. 8 is a schematic perspective view of the rotating ring with a quadrilateral notch formed on the outer periphery of the ring, showing the back side of the rotating ring.

Fig. 9 is a schematic perspective view of the movable ring with an arc-shaped notch formed in the inner ring thereof, showing the binding surface thereof.

Fig. 10 is a schematic perspective view of the movable ring with circular arc-shaped notches formed in the outer periphery and the inner ring of the ring, showing the binding surface of the movable ring.

Fig. 11 is a schematic perspective view of a stationary ring with a circular arc-shaped notch formed in the outer periphery of the stationary ring, showing the attachment surface thereof.

Fig. 12 is a perspective view of a stationary ring with a circular arc-shaped notch formed on the outer circumference of the stationary ring, showing the back side of the stationary ring.

FIG. 13 is a schematic view showing the separation state of the movable ring and the stationary ring attached to each other according to the present invention.

Reference numbers in the figures: 1. a moving ring; 2. a stationary ring; 3. a notch; 4. a rotating shaft; 5. a movable ring seat; 6. a stationary ring seat; 7. a spring; 8. a machine seal seat; 9. recessing; 10. and (5) matching the notch.

Detailed Description

The following describes a specific embodiment of the present invention, as shown in fig. 1 to 10.

The present invention can be applied to any shaft seal device of a rotor pump including a rotating ring 1 and a stationary ring 2 attached to each other, for example, an inner mount type single end face shaft seal device shown in fig. 1. The following description will be made of an embodiment of the present invention, taking as an example the built-in single-end-face shaft seal device shown in fig. 1 to 10 and the rotating ring or the stationary ring shown in fig. 3 to 10.

As shown in fig. 1, a shaft sealing device with a single end face is provided, a rotating shaft 4 of a rotor pump is fixedly connected with an impeller as a rotor, the shaft sealing device comprises a movable ring seat 5, a movable ring 1, a stationary ring 2, a stationary ring seat 6, a spring 7 and a machine seal seat 8, which are all cylindrical and are sleeved outside the rotating shaft 4, the machine seal seat 8 is sleeved outside and is fixedly connected with a pump body, the outer side of the machine seal seat 8 is a closed end, the movable ring seat 5 is fixedly connected with the rotating shaft 4, the movable ring is driven by the movable ring seat 5, and the movable ring 1 and the stationary ring 2 are mutually attached to form a friction pair running at high speed.

In the sealing device for the pump shaft of the prior art, a moving ring 1 and a stationary ring 2 of the sealing device are shown in fig. 2, the moving ring 1 is provided with a connecting structure for being in transmission connection with a moving ring seat 5, and the connecting structure is arranged at a recess 9 at the periphery of the moving ring 1 as shown in fig. 2. The stationary ring 2 of the prior art rotor pump shaft sealing device is provided with a matching structure for connecting and matching with the stationary ring seat 6 or the mechanical seal seat 8, and as shown in fig. 2, the matching structure is arranged at a matching notch 10 of an inner ring of the stationary ring 2.

The shaft sealing device of the rotor pump comprises a movable ring 1 and a fixed ring 2 which are attached to each other, and a shearing mechanism is arranged between the movable ring 1 and the fixed ring 2 by utilizing the attachment relationship between the movable ring 1 and the fixed ring 2 and the rotation relationship between the movable ring 1 and the fixed ring 2 relative to the fixed ring 2.

The shearing mechanism is arranged as follows: the periphery or/and the inner ring of the movable ring 1 at the joint surface side is provided with a gap 3, or the periphery or/and the inner ring of the static ring 2 at the joint surface side is provided with a gap 3, or the periphery or/and the inner ring of the movable ring 1 at the joint surface side and the periphery or/and the inner ring of the static ring 2 at the joint surface side are respectively provided with a gap 3. That is, the notch 3 may be opened on the moving ring 1, as shown in fig. 3 to 10; or on the stationary ring 2, as shown in fig. 11 and 12; the movable ring 1 and the static ring 2 can also be respectively provided. The notch 3 may be opened on the ring outer periphery of the attaching surface side of the moving ring 1 or the stationary ring 2, as shown in fig. 3 to 8; may be provided on the inner ring of the movable ring 1 or the stationary ring 2 on the contact surface side, as shown in fig. 9; the outer circumference of the movable ring 1 or the stationary ring 2 on the contact surface side may be opened in the inner ring and the outer ring, respectively, as shown in fig. 10.

The notch 3 is a uniform cross-section notch 3 formed on the outer side of the attaching surface of the driven ring 1 or the stationary ring 2, so that the processing and forming are convenient. The gap 3 can be a groove gap 3 which is opened to the wall thickness of the part of the movable ring 1 or the static ring 2. The gap 3 may also be a through-gap 3 extending through the wall thickness of the moving ring 1 or the stationary ring 2. In addition, the outer circumference of the rotating ring 1 may still be provided with a recess 9 for driving connection with the rotating ring seat 5, as shown in fig. 3 to 10. The inner ring of the static ring 2 can still be provided with a matching notch 10, as shown in fig. 11 and 12.

The number and arrangement of the notches 3 are preferably 3 to 6, more preferably 4, evenly distributed along the ring periphery or/and the ring inner ring periphery of the moving ring 1 or the stationary ring 2.

The shape of the notch 3 can be specifically realized in the following ways:

as shown in fig. 3 and 4, the notch 3 is an arc-shaped notch 3 having a circular arc-shaped cross section.

As shown in fig. 5 and 6, the notch 3 is a triangular notch 3 having a triangular cross section. Fig. 5 shows an asymmetrical triangular notch 3, and fig. 6 shows a symmetrical triangular notch 3.

As shown in fig. 7 and 8, the notch 3 is a quadrangular notch 3 having a quadrangular cross section.

As shown in fig. 3 to 8, the notch 3 is provided on the ring outer periphery of the movable ring 1 or the stationary ring 2 on the contact surface side. As shown in fig. 9, the notch 3 may be provided in the inner ring on the contact surface side of the moving ring 1 or the stationary ring 2. When the outer circumference and the inner ring of the moving ring 1 or the stationary ring 2 are both provided with the notches 3, the notches 3 are suitably and uniformly distributed in the outer circumference and the inner ring circumference of the moving ring 1 or the stationary ring 2 in a staggered manner, as shown in fig. 10. The staggered and uniform distribution can ensure that the effect of blocking the skin or cutting the fiber is better.

The following explains the structure and operation of the shearing mechanism, taking as an example a case where the notch 3 is formed only in the outer circumference of the rotating ring 1 on the contact surface side: as shown in fig. 13, the outer circumference of the movable ring 1 on the attaching surface side is provided with 4 notches 3 uniformly distributed along the circumference. Because the rotating ring 1 and the static ring 2 are mutually attached, and the rotating ring 1 rotates relative to the static ring 2, the rotating ring 1 and the static ring 2 form a shearing cutter due to the existence of the 4 gaps 3 on the rotating ring 1, and the 4 gaps 3 form a feeding hole of the shearing cutter, so that the leather lumps or fibers around the shearing cutter can be cut. The concrete situation is as follows: the entered or notched skin lumps or fibers are immediately cut off and chopped; or if leather lumps or fibers just enter the micro gaps formed instantly, the fibers are cut off immediately; and is thrown away to the periphery by the centrifugal force of the rotating ring. The notch also has the function of heat dissipation. Practical use proves that leather lumps or fibers with damage effects can be effectively prevented from entering between the movable ring and the static ring which are mutually attached, and the phenomena of heating and material leakage of the attaching surfaces of the movable ring and the static ring are caused, so that the shaft sealing performance of the rotor pump and the service life of shaft sealing are remarkably improved. The invention skillfully utilizes the joint and rotation relation of the movable ring relative to the static ring, and adopts a simple and feasible technical means of arranging the notch on the periphery of the ring or/and the inner ring of the movable ring or the joint surface side of the static ring, thereby not increasing any part and hardly increasing the manufacturing cost and effectively solving the technical problem which can not be solved for a long time in the industry. Not only can the leakage be avoided when the common pure materials are conveyed, but also the inter-shaft leakage phenomenon can not occur when the materials containing skin caking or fiber or particle impurities are conveyed, the bonding surfaces of the dynamic and static rings can not generate heat, and the dynamic and static rings are not easy to damage any more.

All references to left, right, up, down, front, rear, etc. in this specification are to be understood as being relative to the drawings attached to this specification, for convenience of description, and not as limiting the invention.