CN214533685U - Double-suction split pump sealing ring mounting structure - Google Patents

Abstract

A sealing ring mounting structure of a double-suction split pump comprises a pump body, a pump cover, a sealing ring, an impeller, a pressing plate and a positioning pin; be equipped with first semicircle hole in the pump body, be equipped with semicircular recess in the pump cover, the clamp plate is the semiannular and sets up in the recess of pump cover, be equipped with first pinhole on the clamp plate, screw and pump body fixed connection are passed through at the both ends of clamp plate, the sealing ring cover is on the choma of impeller, the medial surface of sealing ring and the choma clearance fit of impeller, the lateral surface of sealing ring and the pore wall of first semicircle hole, the medial surface contact of clamp plate, be equipped with the second pinhole on the lateral surface of sealing ring, the sealing ring passes through the locating pin and is connected with the clamp plate. The utility model discloses a clamp plate and locating pin are fixed and are fixed a position the sealing ring, and sealing ring processing is simple, and clearance measurable quantity and adjustment between sealing ring and the impeller are maintained portably.

Description

Double-suction split pump sealing ring mounting structure

Technical Field

The utility model belongs to the technical field of the double entry pump, concretely relates to open pump sealing ring mounting structure in double entry.

Background

Referring to fig. 1 and 2, in the existing double-suction axially split pump, a first semicircular hole 101 and a semicircular groove 102 located on the hole wall of the first semicircular hole 101 are processed at a sealing ring installation position in a pump body 1, a second semicircular hole 201 is processed at a sealing ring installation position in a pump cover 2, a sealing ring 3 is sleeved on an opening ring 401 of an impeller 4, a semicircular convex rib 301 corresponding to the groove 102 is arranged on the outer side surface of the sealing ring 3, the inner side surface of the sealing ring 3 is in clearance fit with the opening ring 401 of the impeller 4, and a clearance is marked as a clearance a.

During assembly, the impeller 4 is arranged on the shaft 5 to form a rotor component, the sealing ring 3 is sleeved on the opening ring 401 of the impeller 4, the impeller 4 and the sealing ring 3 are suspended above the pump body 1, the whole rotor component falls down after the position is adjusted, the convex rib 301 of the sealing ring 3 is placed in the groove 102, and finally the pump cover 2 is arranged on the pump body 1 to complete assembly. The groove 102 of the pump body 1 is matched with the convex rib 301 of the sealing ring 3 to realize the axial positioning of the sealing ring 3; the inner hole of the pump cover 2 is matched with the convex rib 301 of the sealing ring 3, so that the sealing ring 3 cannot rotate in the circumferential direction.

The prior structure has the following defects:

(1) the gap a during installation cannot be measured and adjusted: before the pump cover 2 is not installed, the sealing ring 3 is not completely positioned, the upper half part of the sealing ring 3 is not matched with the pump cover 2 and is not stressed, so that a gap a is not formed, and measurement cannot be carried out. And after the pump cover 2 and the pump body 1 are assembled, the sealing ring 3 is sealed in the pump body 1 and the pump cover 2, so that measurement cannot be performed, and the theoretical gap a can only be obtained by machining the sizes of parts before assembly. In fact, during the assembly process, the sealing ring 3 is deformed after the assembly constraints, which may cause a deviation between the clearance a and the theoretical value, which may affect the performance of the water pump. The performance of the water pump is reduced due to the overlarge gap, and the sealing ring 3 can be eccentric, so that a part of the sealing ring 3 is in direct contact with the impeller 4, friction is generated during operation, and the electric energy loss is increased. If the gap adjustment in the later period can not be carried out, the qualification rate of the product is reduced.

(2) The overhaul is inconvenient: after the water pump is used, a regular maintenance work is needed, the gap of the sealing ring 3 needs to be checked, after the water pump is used for a long time, the sealing ring 3 has certain loss, the gap needs to be guaranteed to be in a qualified size range, and the efficient operation of the water pump can be guaranteed. After the pump is dismantled to current structure, the first half of sealing ring 3 loses the atress, and unable accurate detection clearance influences the maintenance result.

(3) The sealing ring 3 is inconvenient to process: only the lower half part of the outer side surface of the sealing ring 3 is provided with a semi-annular convex rib 301, and the sealing ring is not a symmetrical circular ring part, so that the processing is inconvenient; both ends and the excircle of the convex rib 301 have precision and tolerance requirements, and due to structural reasons, the convex rib cannot be machined at one time, and can only be machined by adopting secondary clamping, so that the dimensional precision is influenced.

SUMMERY OF THE UTILITY MODEL

The utility model discloses to the not enough of above-mentioned prior art, provide a double suction well pump sealing ring mounting structure that opens.

The purpose of the utility model can be realized by the following technical scheme: a sealing ring mounting structure of a double-suction split pump comprises a pump body, a pump cover, a sealing ring, an impeller, a pressing plate and a positioning pin; the sealing ring installation department in the pump body is equipped with first semicircle hole, clamp plate installation department in the pump cover is equipped with the recess of semiannulus, the clamp plate is the semiannulus and sets up in the recess of pump cover, is equipped with first pinhole on the clamp plate, and screw and pump body fixed connection are passed through at the both ends of clamp plate, sealing ring cover is on the choma of impeller, and the medial surface of sealing ring and the choma clearance fit of impeller, the lateral surface of sealing ring and the pore wall of first semicircle hole, the medial surface contact of clamp plate, be equipped with the second pinhole corresponding with the first pinhole of clamp plate on the lateral surface of sealing ring, the sealing ring passes through the locating pin and is connected with the clamp plate.

Furthermore, both ends of the pressure plate and the pump body are correspondingly provided with through holes and threaded holes matched with the screws.

Further, the first pin hole of the pressure plate is vertically formed in the middle of the pressure plate.

Compared with the prior art, the beneficial effects of the utility model are that:

(1) the sealing ring is fixed and positioned by the pressing plate and the positioning pin, the original convex rib structure on the sealing ring is eliminated, and the sealing ring is a simple annular part and is easy to process;

(2) the clearance between the seal ring and the impeller can be measured and adjusted: after the pressing plate is fixed, the gap can be directly detected and adjusted until the gap meets the design requirement, and then the pump cover is installed, so that the use stability and the qualification rate of the water pump are improved;

(3) the maintenance is simple and convenient: during maintenance, the gap loss can be directly detected only by detaching the pump cover, and the method is very convenient.

Drawings

FIG. 1 is a schematic diagram of a prior art structure;

FIG. 2 is a schematic exploded sectional view of A '-A' of FIG. 1;

FIG. 3 is a schematic structural view of the present invention;

fig. 4 is a schematic cross-sectional view taken along line a-a in fig. 3.

The reference numbers are as follows:

1 Pump body

101 first semicircle orifice

102 trench

2 Pump cover

201 second semicircular hole

202 groove

3 sealing ring

301 convex rib

4 impeller

401 mouth ring

5 shaft

6 pressing plate

7 positioning pin

a gap.

Detailed Description

The following detailed description of the embodiments of the present invention will be given with reference to the accompanying drawings to make it clear to those skilled in the art how to practice the invention. While the invention has been described in connection with its preferred embodiments, these embodiments are intended to be illustrative, and not to limit the scope of the invention.

Referring to fig. 3 and 4, the sealing ring mounting structure of the double-suction axially split pump comprises a pump body 1, a pump cover 2, a sealing ring 3, an impeller 4, a pressure plate 6 and a positioning pin 7.

The pump body 1 and the pump cover 2 are connected through bolts and nuts, a first semicircular hole 101 is formed in the installation position of the sealing ring in the pump body 1, and a semicircular groove 202 is formed in the installation position of the pressing plate in the pump cover 2.

The pressing plate 6 is semi-annular and is arranged in the groove 202 of the pump cover 2, a first pin hole is arranged on the pressing plate 6 in the middle, two ends of the pressing plate 6 are fixedly connected with the pump body 1 through screws, and through holes and threaded holes matched with the screws are correspondingly formed in two ends of the pressing plate 6 and the pump body 1.

The sealing ring 3 is sleeved on the mouth ring of the impeller 4, the inner side surface of the sealing ring 3 is in clearance fit with the mouth ring of the impeller 4, and the clearance is marked as clearance a. The outer side surface of the sealing ring 3 is in contact with the hole wall of the first semicircular hole 101 and the inner side surface of the pressing plate 6, a second pin hole corresponding to the first pin hole of the pressing plate 6 is formed in the outer side surface of the sealing ring 3, the sealing ring 3 is connected with the pressing plate 6 through a positioning pin 7, and the positioning pin 7 is used for axially positioning and circumferentially positioning the sealing ring 3.

During assembly, the impeller 4 is arranged on the shaft 5 to form a rotor part, and the shaft 5 is supported by bearings at two ends. The sealing ring 3 is sleeved on a mouth ring of the impeller 4, the impeller 4 and the sealing ring 3 are suspended above the pump body 1, the whole rotor component falls down after the position is adjusted, and a second pin hole of the sealing ring 3 is vertically arranged upwards. Then, the pressure plate 6 is mounted on the pump body 1, the circumferential position of the sealing ring 3 is adjusted to align the second pin hole of the sealing ring 3 with the first pin hole of the pressure plate 6, the positioning pin 7 is mounted in the first pin hole and the second pin hole, and the pressure plate 6 is fixed on the pump body 1 by screws. And detecting a gap a between the sealing ring 3 and the impeller 4, and if the gap a is not qualified, loosening the pressure plate 6, and adjusting and modifying the sealing ring 3 until the design requirement is met. Finally, the pump cover 2 and the pump body 1 are assembled by bolts and nuts to complete the assembly.

It should be noted that many variations and modifications of the embodiments of the present invention are possible, which are fully described, and are not limited to the specific examples of the above embodiments. The above embodiments are merely illustrative of the present invention and are not intended to limit the present invention. In conclusion, the scope of the present invention should include those changes or substitutions and modifications which are obvious to those of ordinary skill in the art.

Claims (3)

1. A sealing ring mounting structure of a double-suction split pump is characterized by comprising a pump body, a pump cover, a sealing ring, an impeller, a pressure plate and a positioning pin; the sealing ring installation department in the pump body is equipped with first semicircle hole, clamp plate installation department in the pump cover is equipped with the recess of semiannulus, the clamp plate is the semiannulus and sets up in the recess of pump cover, is equipped with first pinhole on the clamp plate, and screw and pump body fixed connection are passed through at the both ends of clamp plate, sealing ring cover is on the choma of impeller, and the medial surface of sealing ring and the choma clearance fit of impeller, the lateral surface of sealing ring and the pore wall of first semicircle hole, the medial surface contact of clamp plate, be equipped with the second pinhole corresponding with the first pinhole of clamp plate on the lateral surface of sealing ring, the sealing ring passes through the locating pin and is connected with the clamp plate.

2. The seal ring mounting structure of a double suction split pump according to claim 1, wherein both ends of the pressure plate and the pump body are correspondingly provided with through holes and threaded holes for fitting with screws.

3. The seal ring mounting structure for a double suction split pump according to claim 1, wherein the first pin hole of the pressure plate is vertically opened at a center of the pressure plate.

Images