CN219549189U - Floating sealing ring structure of split double suction pump - Google Patents

Abstract

The utility model discloses a floating sealing ring structure of a split double-suction pump, which belongs to the field of sealing structures and comprises two floating sealing rings and double-suction impellers, wherein the two floating sealing rings are respectively in clearance fit with the double-suction impellers on two sides, a sealing ring gland is tightly pressed on one side of the floating sealing ring, which is close to a water inlet chamber, and the floating sealing ring, the sealing ring gland and a sealing fixing ring can play a good sealing role on the double-suction impellers, and in the subsequent maintenance, only the floating sealing rings are replaced. This scheme can improve water pump efficiency can also reduce the noise of double suction pump simultaneously, simple structure, cost are lower, and it is convenient to maintain.

Description

Floating sealing ring structure of split double suction pump

Technical Field

The utility model relates to a sealing structure, in particular to a floating sealing ring structure of a split double suction pump.

Background

In the prior art, the sealing performance of the medium-open double-suction water pump has an important influence on the efficiency of the water pump, and the sealing effect of the water pump is poor, so that the leakage amount of the water pump can be increased, the efficiency of the pump is reduced, and the energy consumption is increased. The common split double-suction pump is usually sealed by matching the sealing ring with the impeller water inlet, but the sealing performance is not good, and larger noise is easy to generate between the sealing ring and the rotating shaft.

For example: chinese patent publication No. CN 205639052U, publication date 2016, 10 and 12, entitled single-stage double-suction split pump for preventing seal ring from falling off. The scheme discloses a double-suction split pump, is equipped with sealing component between the pump body and the impeller, and the pump cover department of both sides is equipped with packing sealing device and mechanical seal device respectively, and packing sealing device and mechanical seal device pass through sealing rib plate and pump cover and impeller cooperation, and it can solve the sealing ring effectively and drop the problem, but its leakproofness is nevertheless not good, and the sealing clearance is 1.5-3mm, and sealing accuracy is not enough, produces great noise moreover easily.

Disclosure of Invention

The utility model solves the problem of poor sealing performance at the impeller of the pump in the prior art, and provides the floating sealing ring structure of the double-suction pump with the scheme, which can well solve the problem of poor sealing at the impeller through the floating sealing ring and the sealing ring gland.

In order to solve the technical problems, the utility model adopts the following scheme: the floating sealing ring structure of the split double-suction pump comprises two floating sealing rings and double-suction impellers, wherein the two floating sealing rings are respectively in clearance fit with the double-suction impeller port rings on two sides, and a sealing ring gland is tightly pressed on one side, close to a water inlet chamber, of the floating sealing rings. The floating sealing ring is PPS plastic material, with the mouth ring surface clearance fit of double suction impeller, unilateral clearance design is 0.05mm to floating sealing ring is close to intake chamber one side and is compressed tightly by the sealing ring gland and block, and sealing ring gland inner circle aperture is also the same with pivot and floating sealing ring internal diameter, not only can play further effect of promoting to sealed effect, can also prevent simultaneously that the floating sealing ring from moving towards intake chamber one side. By the scheme, the problem of poor sealing at the double-suction impeller ring can be effectively solved.

Preferably, the seal ring gland is stepped and comprises a first annular pressure surface and a second annular pressure surface, the floating seal ring is attached to the first annular pressure surface, and the radial length of the first annular pressure surface is greater than that of the floating seal ring. The first ring surface of the sealing ring gland is attached to one side of the floating sealing ring, the floating sealing ring is provided with a certain axial limiting function, the radial length of the first ring pressing surface is required to be larger than that of the floating sealing ring, a certain space is reserved for the floating sealing ring to move up and down in the radial direction of the rotating shaft, and the problems of double suction impeller eccentricity and the like caused by manufacturing deviation can be effectively eliminated.

Preferably, the sealing device further comprises two concave sealing fixing rings, wherein the annular surface of the notch of each sealing fixing ring is attached to one side, far away from the water inlet chamber, of each floating sealing ring, and the convex surface of the edge of each sealing fixing ring is attached to the second ring pressing surface of each sealing ring pressing cover. The notch ring surface of the sealing fixed ring is embedded with the floating sealing ring, and the first ring pressing surface and the second ring pressing surface of the sealing ring pressing cover are respectively attached to the edge convex surfaces of the floating sealing ring and the sealing fixed ring, so that the floating sealing ring can be fixed between the sealing ring pressing cover and the sealing fixed ring, the floating sealing ring can be effectively prevented from moving left and right, and a better effect is achieved on sealing of the double-suction impeller ring.

Preferably, the outer ring edge of the sealing fixing ring is provided with fixing holes and fixedly connected with the pump body through a plurality of fixing pieces, the outer edge of the sealing fixing ring is further provided with annular grooves on two sides of the fixing pieces, and O-shaped rings are arranged in the annular grooves. The sealing fixed ring outer ring edge has the fixed orifices, and the pump body corresponds the position and also is equipped with the fixed orifices, can adopt the round pin axle with sealing fixed ring and pump body fixed connection, prevent that the pump from rotating when rotating for sealing fixed ring rotates together, and on sealing fixed ring outer ring, the ring channel of installation O shape circle is in addition on the round pin axle both sides, and O shape circle can seal between the pump body and the sealing fixed ring, and this is static seal, therefore sealed effect is better.

Preferably, the edge convex surface of the sealing fixing ring and the second ring pressing surface of the sealing ring pressing cover are annularly and uniformly provided with a plurality of connecting holes which are matched with each other and are connected through screws. The connecting holes on the sealing fixed ring and the sealing ring gland are connected through screws, so that the sealing fixed ring, the floating sealing ring and the sealing ring gland can be fixed together.

Preferably, a plurality of grooves are annularly and uniformly distributed at the joint of the floating sealing ring and the sealing ring gland, and the corresponding position of the sealing ring gland is provided with a lug matched with the groove. The groove can be arranged on any one structure of the floating sealing ring and the sealing ring gland, the convex blocks are arranged on the other structure, and the floating sealing ring and the sealing ring gland can be relatively fixed, so that the floating sealing ring and the sealing ring gland can be effectively prevented from rotating, and poor sealing is prevented.

Preferably, the water inlet caliber of the double-suction impeller is larger than the water outlet caliber, the water inlet chamber is communicated with the inner cavity of the pump body through the double-suction impeller, and the inner cavity of the pump body is communicated with the outside through the water outlet of the pump body. The water inlet of the double-suction impeller is larger than the water outlet, so that the water pressure is increased at the water outlet, the pump body is better discharged, and the efficiency of the double-suction pump is improved.

Compared with the prior art, the utility model has the following effects: (1) The sealing performance at the water inlet of the double suction impeller is better, and the efficiency of the water pump can be improved; (2) The floating sealing ring structure is adopted, so that noise can be effectively reduced; and (3) the structure is simple, the cost is lower, and the maintenance is more convenient.

Drawings

Fig. 1 is a schematic structural view of the present utility model.

Fig. 2 is an enlarged view of a in fig. 1.

Fig. 3 is an exploded view of the seal structure of the present utility model.

Fig. 4 is an exploded view of another view angle seal structure of the present utility model.

In the figure: 1. the sealing ring comprises a floating sealing ring, a double-suction impeller ring, a water inlet chamber, a sealing ring gland, a first annular pressing surface, a second annular pressing surface, a sealing fixing ring, a notch annular surface, a rim convex surface, a fixing piece, a pump body, a fixing hole, a circular groove, an O-shaped ring, a connecting hole, a screw, a groove, a lug, a water inlet, a water outlet, a pump body inner cavity and a pump body water outlet.

Detailed Description

The technical scheme of the utility model is further specifically described below through specific embodiments and with reference to the accompanying drawings.

Examples: the floating seal ring structure of the split double suction pump as shown in fig. 1 to 4 has the same structure on both sides of the double suction pump and is described with only one side. The double-suction impeller comprises a floating sealing ring 1 and a double-suction impeller 2, wherein the floating sealing ring 1 is in clearance fit with a double-suction impeller ring 3, the sealing clearance can reach 0.05mm precision, the sealing performance of the floating sealing ring 1 on the double-suction impeller ring 3 is good, the leakage quantity of the double-suction pump can be effectively reduced, the volumetric efficiency of the pump is greatly improved, and the energy consumption is reduced.

The first annular pressure surface 6 of the sealing ring gland 5 is attached to one side of the floating sealing ring 1, which is close to the intake chamber 4, the notch annular surface 9 of the sealing fixed ring 8 is attached to one side of the floating sealing ring 4, which is far away from the intake chamber 4, and the edge convex surface 10 of the sealing fixed ring 8 is attached to the second annular pressure surface 7 of the sealing ring gland 5, so that the floating sealing ring 1 is internally arranged between the sealing fixed ring 8 and the sealing ring gland 5, and the axial movement of the floating sealing ring 1 can be effectively prevented, and the sealing performance is improved. Wherein the radial length of the first ring pressing surface 6 of the sealing ring pressing cover 5 is larger than the radial length of the floating sealing ring 1; a certain gap is reserved between the floating sealing ring 1 and the sealing fixed ring 8 in the radial direction for the floating sealing ring 1 to move in the radial direction, so that the problems of eccentricity and the like of the double suction impeller 2 caused by manufacturing deviation are effectively solved; meanwhile, the radial length of the first ring pressing surface 6 is larger than or equal to the radial length of the notch ring surface 9 of the sealing and fixing ring 8, separation or virtual contact between the sealing and fixing ring 8 and the double-suction impeller opening 3 ring can be ensured, and the friction force between the whole sealing structure and the double-suction impeller opening ring 3 is reduced, so that the noise reduction effect can be realized, and as only the floating sealing ring 1 is in contact with the double-suction impeller opening ring 3, the floating sealing ring 1 is made of PPS plastic, the double-suction impeller 2 is made of stainless steel, abrasion only occurs on the floating sealing ring 1, and after long-time work, the structure of the floating sealing ring 1 can be replaced to continue work, thereby facilitating subsequent maintenance; if the radial length of the annular surface 9 of the notch of the sealing and fixing ring 8 is larger than that of the first ring pressing surface 6, the sealing and fixing ring 8 is contacted with the double-suction impeller ring 3, noise is generated by friction force is increased, meanwhile, the double-suction impeller 2 is worn, and the service life of equipment is greatly reduced.

A plurality of fixing holes 13 are annularly and uniformly distributed on the outer edge of the sealing fixing ring 8, and corresponding positions of the pump body 12 contacted with the fixing holes are also provided with matched fixing holes, and the fixing holes 13 of the sealing fixing ring and the pump body are connected through fixing pieces 11 such as pin shafts; the sealing fixing ring 8 and the pump body 12 can be fixedly connected through the pin shaft, the sealing fixing ring 8 and the pump body 12 are prevented from rotating mutually, and meanwhile, a plurality of matched connecting holes 16 are uniformly distributed on the edge convex surface 10 of the sealing fixing ring 8 and the second ring pressing surface 7 of the sealing ring pressing cover 5 in an annular mode and are connected through screws 17. The screw 17 is connected with the sealing ring gland 5 and the sealing fixing ring 8 to fix the sealing ring gland 5 and the sealing fixing ring 8 in the circumferential direction, and the sealing ring gland 5 and the sealing fixing ring 8 can be prevented from rotating in the circumferential direction; an anti-rotation structure is also arranged between the floating seal ring 1 and the seal ring gland 5, a groove 18 is arranged on the floating seal ring 1, a corresponding bump 19 is arranged on the first annular pressure surface 6 of the seal ring gland 5, or a corresponding groove 18 is arranged on the first annular pressure surface 6 of the seal ring gland 5 when the bump 19 is arranged on the floating seal ring 1, and the bump 19 and the groove 18 can effectively prevent the floating seal ring 1 and the seal ring gland 5 from rotating; therefore, the floating sealing ring 1, the sealing ring gland 5 and the sealing fixing ring 8 are completely fixed, and the floating sealing ring, the sealing gland 5 and the sealing fixing ring play a sealing role together at the double suction impeller ring 3 when the double suction pump works. The outer edge of the sealing fixing ring 8 is respectively provided with annular grooves 14 at two sides of the pin shaft, the annular grooves 14 are used for installing O-shaped rings 15, and the O-shaped rings 15 are used for sealing between the pump body 12 and the sealing fixing ring 8.

The caliber of the water inlet 20 of the double-suction impeller 2 is larger than that of the water outlet 21, the water inlet 20 is communicated with the water inlet chamber 4, the water outlet 21 is communicated with the inner cavity 22 of the pump body, and the inner cavity 22 of the pump body is communicated with the outside through the water outlet 23 of the pump body. When the double suction pump starts to work, water in the water inlet chamber 4 enters the pump body cavity 22 under the action of the double suction impeller 2, the caliber of the water inlet 20 is larger than that of the water outlet 21, the water is favorable for forming larger pressure at the water outlet 21, the flow rate of the water is increased, the water is favorable for being output to the outside from the pump body cavity 22 through the water outlet 23 of the pump body, and the output efficiency of the pump is increased.

Claims (7)

1. The floating sealing ring structure of the split double-suction pump is characterized by comprising two floating sealing rings and double-suction impellers, wherein the two floating sealing rings are respectively in clearance fit with double-suction impeller port rings on two sides, and a sealing ring gland is tightly pressed on one side of the floating sealing ring, which is close to a water inlet chamber.

2. The floating seal ring structure of a split double suction pump of claim 1, wherein the seal ring gland is stepped and comprises a first annular pressure surface and a second annular pressure surface, the floating seal ring is in contact with the first annular pressure surface and the radial length of the first annular pressure surface is greater than the radial length of the floating seal ring.

3. The floating seal ring structure of a split double suction pump according to claim 1, further comprising two concave seal fixing rings, wherein the notch ring surface of each seal fixing ring is attached to one side of the floating seal ring away from the intake chamber, and the edge convex surface of each seal fixing ring is attached to the second ring pressing surface of the seal ring pressing cover.

4. The floating seal ring structure of the split double suction pump according to claim 3, wherein the outer ring edge of the seal fixing ring is provided with a fixing hole and fixedly connected with the pump body through a plurality of fixing pieces, annular grooves are further arranged on two sides of the fixing pieces at the outer edge of the seal fixing ring, and O-shaped rings are arranged in the annular grooves.

5. The floating seal ring structure of the split double suction pump according to claim 3 or 4, wherein the edge convex surface of the seal fixing ring and the second ring pressing surface of the seal ring pressing cover are annularly and uniformly provided with a plurality of matched connecting holes and are connected through screws.

6. A floating seal ring structure of a split double suction pump according to any one of claims 1 to 3, wherein a plurality of grooves are uniformly distributed on the joint of the floating seal ring and the seal ring gland in an annular manner, and the corresponding position of the seal ring gland is provided with a convex block matched with the groove.

7. The floating seal ring structure of the split double suction pump according to claim 1, wherein the water inlet caliber of the double suction impeller is larger than the water outlet caliber, the water inlet chamber is communicated with the inner cavity of the pump body through the double suction impeller, and the inner cavity of the pump body is communicated with the outside through the water outlet of the pump body.