CN216554570U

CN216554570U - Bag-type core cladding structure of condensate pump

Info

Publication number: CN216554570U
Application number: CN202123097061.9U
Authority: CN
Inventors: 赵志雄; 宋锡梁; 王玉霞
Original assignee: Shenyang Qiyuan Industrial Pump Manufacturing Co ltd
Current assignee: Shenyang Qiyuan Industrial Pump Manufacturing Co ltd
Priority date: 2021-12-10
Filing date: 2021-12-10
Publication date: 2022-05-17
Anticipated expiration: 2031-12-10

Abstract

The utility model provides a bag type condensate pump core cladding structure, belonging to the technical field of condensate pumps, and the bag type condensate pump core cladding structure comprises: the device comprises a positioning shaft sleeve, a bearing, a guide shell, a bearing gland, a first fixing groove, a thrust ring and an impeller; the installation mode of new construction is simple, realizes easily, and a mature assembly workman can light completion. The matching between the positioning shaft sleeve and the thrust ring and between the positioning shaft sleeve and the impeller is clearance positioning matching, and the positioning groove is processed according to a drawing when the shaft is processed, so that the shaft is easy to install. The novel structure unifies the shaft diameter, a first fixing groove is formed in the pump shaft in a turning mode, the thrust ring is embedded into the first fixing groove, the impeller and the positioning shaft sleeve are fixed together through the thrust ring through screws, and then the impeller can be fixed. In addition, when the pump is started or in the running process, the problems of vibration and the like of the pump caused by loosening of the impeller due to the unbalance of the axial force of the impeller cannot occur.

Description

Bag-type core cladding structure of condensate pump

Technical Field

The utility model belongs to the technical field of condensate pumps, and particularly relates to a core cladding structure of a condensate pump.

Background

The condensate pump is suitable for power plants and is generally used for pumping condensate in a condenser and pumping condensate or other liquid with physical and chemical properties similar to water by a steam turbine generator unit. The condensate pump mainly comprises a suction bell mouth, an impeller, a pump shaft, a guide shell, a cylinder body, a pump seat, a supporting pipe, a drainage elbow, a mechanical seal, a bearing, a motor and the like. The impeller of each stage of the condensate pump and other corresponding parts are fixed on the pump shaft together to form a set of rotor part, the rotor part, a guide shell and the like are fixed with the cylinder body through the pump seat and are vertically suspended in the caisson below the ground elevation, condensate enters the first-stage impeller of the pump through the suction bell mouth, enters the second stage through the first stage, and the condensed water is discharged through the discharge port of the pump by analogy in sequence. The suction bell mouth and the guide shell are integrated, and each pump can continuously run according to the characteristic curve of the system.

According to the existing condensate pump structure, an impeller and a pump shaft are fixedly pressed through a conical sleeve, the installation of the impeller requires technical workers to have a particularly good technical level, and the installation can be realized only by the cooperation of a plurality of people, so that the difficulty is high, and time and labor are wasted. Moreover, even though the technical workers have high level, the precision of the impeller and the firm degree of the installed impeller cannot be guaranteed, and the impeller is easy to fall off in use, so that equipment failure is caused, and the maintenance is inconvenient.

SUMMERY OF THE UTILITY MODEL

In order to solve the problems that the prior art is difficult, can be realized only by the cooperation of a plurality of people, and is time-consuming and labor-consuming; the utility model provides a barrel bag type condensate pump core package structure, wherein a first fixing groove is formed in a pump shaft in a lathing mode, a thrust ring is embedded into the first fixing groove, and the impeller and a positioning shaft sleeve are fixed together through the thrust ring by screws, so that the technical effect of fixing the impeller can be realized, and the mounting efficiency and the water pump precision are obviously improved. The specific technical scheme is as follows:

a cartridge-style condensate pump core package structure comprising a pump shaft, the cartridge-style condensate pump core package structure comprising: the device comprises a positioning shaft sleeve, a bearing, a guide shell, a bearing gland, a first fixing groove, a thrust ring and an impeller; the positioning shaft sleeve is arranged on the outer side of the pump shaft; the bearing is arranged on the outer side of the positioning shaft sleeve; the guide shell is arranged on the outer side of the bearing; the bearing gland is arranged on the outer side of the pump shaft, connected with the bearing and connected with the guide shell; the first fixing groove is arranged on the outer wall of the pump shaft along the circumferential direction of the pump shaft; the thrust ring is embedded into the first fixing groove, the inner wall of the thrust ring is attached to the pump shaft, and the outer wall of the thrust ring is attached to the positioning shaft sleeve; the impeller is installed on the outer side of the pump shaft, the impeller is connected with the positioning shaft sleeve, and the impeller is attached to the thrust ring.

In addition, the bag-type condensate pump core package structure in the above technical solution provided by the present invention may further have the following additional technical features:

in the above technical solution, preferably, the bag-type condensate pump core package structure further includes: a second fixing groove; the second fixing groove is formed in the inner wall of the positioning shaft sleeve; wherein the thrust ring is simultaneously inserted into the first fixing groove and the second fixing groove.

In the above technical solution, preferably, a cross-sectional diameter of the thrust collar is 0.04 to 0.08 times a diameter of the pump shaft.

In the above technical solution, preferably, the thrust ring is a 65Mn alloy body.

In the above technical solution, preferably, the bag-type condensate pump core package structure further includes: a first screw; and after the first screw penetrates through the bearing gland, the first screw is connected with the guide shell.

In the above technical solution, preferably, the bag-type condensate pump core package structure further includes: positioning pins; and two ends of the positioning pin are embedded into the bearing and the bearing gland simultaneously.

In the above technical solution, preferably, the bag-type condensate pump core package structure further includes: a second screw; and after the second screw penetrates through the positioning shaft sleeve, the second screw is embedded into the impeller.

In the above technical solution, preferably, the bag-type condensate pump core package structure further includes: a gasket; the gasket is installed in the outside of second screw, just the gasket simultaneously with the second screw with the location axle sleeve is laminated mutually.

In the above technical solution, preferably, the impeller is connected with the pump shaft by a key.

Compared with the prior art, the bag core cladding structure of the barrel-bag type condensate pump has the beneficial effects that: the conical sleeve used in the old structure is in interference fit with the impeller and the pump shaft, and has no definite positioning size; when the impeller is installed, axial displacement needs to be measured every time one impeller is installed, time is delayed, and installation efficiency is low. And the matching surface of the impeller taper hole and the taper of the matched shaft sleeve has certain difficulty in processing, the processing of each part in the water pump is difficult, and the production cost is higher. The mounting mode of the new structure is simple and easy to realize, and a mature assembly worker can easily complete the installation. The matching between the positioning shaft sleeve and the thrust ring and between the positioning shaft sleeve and the impeller is clearance positioning matching, and the positioning groove is processed according to a drawing when the shaft is processed, so that the shaft is easy to install. The novel structure unifies the shaft diameter, a first fixing groove is formed in the pump shaft in a turning mode, the thrust ring is embedded into the first fixing groove, the impeller and the positioning shaft sleeve are fixed together through the thrust ring through screws, and then the impeller can be fixed. In addition, when the pump is started or in the running process, the problems of vibration and the like of the pump caused by loosening of the impeller due to the unbalance of the axial force of the impeller cannot occur.

The pump shaft can be protected by using the positioning shaft sleeve, the abrasion of the pump shaft is reduced, the service life of the pump shaft is prolonged, and the purposes of reducing maintenance times and reducing use cost can be achieved.

And the thrust ring is an unsealed circular ring with a circular section, mainly plays a role in fixing, and has higher centering degree in fixing the circular thrust ring. The section of the thrust ring is circular, so that the thrust ring is easy to process, uniform in stress, good in elasticity, and easy to install by using special calipers.

And thirdly, matching the inner diameter of the thrust ring with the bottom diameter of the first fixing groove on the pump shaft. During installation, the thrust ring needs special calipers to be opened under the action of external force, the thrust ring returns to the original state after the calipers are loosened, and the thrust ring can be fixed in the first fixing groove on the pump shaft without changing the size of the thrust ring. The section of the thrust ring is circular, so that ring shear stress and torsion external force during use can be reduced, and the service life is prolonged.

Drawings

Fig. 1 is a schematic structural diagram of a bag-type condensate pump core package structure according to an embodiment of the present invention;

FIG. 2 is an enlarged view of FIG. 1 at A;

FIG. 3 is an enlarged view of FIG. 1 at B;

FIG. 4 is a schematic structural view of a conventional condensate pump;

FIG. 5 is an enlarged view at C of FIG. 4;

wherein, the correspondence between the reference numbers and the part names in fig. 1 to 5 is:

8. a conical sleeve; 9. a pump shaft; 10. positioning the shaft sleeve; 12. a bearing; 14. a guide shell; 16. a bearing gland; 18. a first fixing groove; 20. a thrust ring; 22. an impeller; 24. a second fixing groove; 26. a first screw; 28. positioning pins; 30. a second screw; 32. and (7) a gasket.

Detailed Description

The utility model will be further described with reference to the following examples and figures 1-5, but the utility model is not limited to these examples.

Example 1

A bag-in-bag condensate pump core package structure, the bag-in-bag condensate pump core package structure comprising a pump shaft 9, as shown in fig. 1-5, the bag-in-bag condensate pump core package structure comprising: the positioning shaft sleeve 10, the bearing 12, the guide shell 14, the bearing gland 16, the first fixing groove 18, the thrust ring 20 and the impeller 22; the positioning shaft sleeve 10 is arranged on the outer side of the pump shaft 9; the bearing 12 is arranged on the outer side of the positioning shaft sleeve 10; the guide shell 14 is arranged on the outer side of the bearing 12; the bearing gland 16 is arranged on the outer side of the pump shaft 9, the bearing gland 16 is connected with the bearing 12, and the bearing gland 16 is connected with the guide shell 14; the first fixing groove 18 is arranged on the outer wall of the pump shaft 9 along the circumferential direction of the pump shaft 9; the thrust ring 20 is embedded in the first fixing groove 18, the inner wall of the thrust ring 20 is attached to the pump shaft 9, and the outer wall of the thrust ring 20 is attached to the positioning shaft sleeve 10; the impeller 22 is installed on the outer side of the pump shaft 9, the impeller 22 is connected with the positioning shaft sleeve 10, and the impeller 22 is attached to the thrust ring 20.

The bag-type condensate pump core package structure of this embodiment further includes: a second holding groove 24; through setting up second fixed slot 24 on the inner wall of location axle sleeve 10, and thrust collar 20 imbeds simultaneously in first fixed slot 18 and the second fixed slot 24, realize the effect that holds thrust collar 20, thrust collar 20 both sides all fluting, and it is better to thrust collar 20's location effect, guarantees that impeller 22 mounted position is accurate, guarantees product quality.

In the embodiment, the diameter of the cross section of the thrust collar 20 is 0.04 times of the diameter of the pump shaft 9, so that the thrust collar 20 has certain strength and rigidity, and meanwhile, the notch of the pump shaft 9 is ensured to have enough strength, thereby avoiding the damage of the pump shaft 9 due to stress concentration and prolonging the service life of the pump shaft 9.

In the embodiment, the thrust ring 20 is made of 65Mn alloy, so that the alloy has high strength and certain flexibility and plasticity after heat treatment and cold-drawing hardening; under the condition of the same surface state and complete quenching, the fatigue limit is equivalent to that of a multicoloured alloy spring, the positioning effect of the thrust ring 20 on the impeller 22 is ensured, the installation difficulty is reduced, and the installation is more accurate.

The bag-type condensate pump core package structure of this embodiment further includes: a first screw 26; after passing through bearing gland 16 through making first screw 26, first screw 26 is connected with blower housing 14, is connected bearing gland 16 and blower housing 14, and the screw auto-lock prevents not hard up, can guarantee that the water pump is long-term use after, bearing gland 16 still not hard up to prevent that bearing 12 and location axle sleeve 10 are not hard up, prevent the wearing and tearing of pump shaft 9, improve the life of pump shaft 9, reduce use cost.

The bag-type condensate pump core package structure of this embodiment further includes: positioning pins 28; by embedding the two ends of the positioning pin 28 into the bearing 12 and the bearing gland 16 at the same time, the bearing gland 16 is fixed before the shaft is connected with the bearing gland 16, so that the installation difficulty of the bearing gland 16 is reduced, and the installation efficiency is improved.

The bag-type condensate pump core package structure of this embodiment further includes: a second screw 30; after the second screw 30 penetrates through the positioning shaft sleeve 10, the second screw 30 is embedded into the impeller 22, the impeller 22 and the positioning shaft sleeve 10 are connected together through the screws, the threads are self-locked to prevent loosening, the impeller 22 is prevented from rotating relative to the pump shaft 9, the impeller 22 can still rotate synchronously with the pump shaft 9 after the water pump is used for a long time, and the accuracy of the flow of discharged fluid is guaranteed.

The bag-type condensate pump core package structure of this embodiment further includes: a spacer 32; through installing gasket 32 in the outside of second screw 30, and gasket 32 laminates mutually with second screw 30 and location axle sleeve 10 simultaneously, prevents that second screw 30 is not hard up, guarantees the second stability of deciding to guarantee that impeller 22 is not hard up, guarantee the precision of water pump.

This embodiment is through making impeller 22 and pump shaft 9 pass through the key-type connection, further prevents that impeller 22 and pump shaft 9 from producing relative rotation, fixes a position impeller 22 before impeller 22 installs, and is more stable when impeller 22 installs, improves the installation effectiveness.

The device of the embodiment is applied to a certain condensate pump in an attempt, a first fixing groove 18 is firstly turned on a pump shaft 9, a positioning shaft sleeve 10 is firstly installed on the pump shaft 9 during installation, a certain distance is reserved from the first fixing groove 18 on the pump shaft 9 so as to facilitate installation of a thrust ring 20, a thrust ring 20 is installed in the first fixing groove 18 by special calipers, an impeller 22 is installed again, the positioning shaft sleeve 10 and the impeller 22 are fixed together through the thrust ring 20 by a second screw 30, fixation of the impeller 22 can be achieved, and no installation dead angle exists.

After the new structure is used, the time for installing each group of impellers 22 and the guide shell 14 is about 2 minutes; the time for installing each group of impellers 22 and guide shell 14 in the original structure is about 10-15 minutes, and the efficiency is improved by 80-87%. The whole water pump with the new structure needs 4 hours for installation; the installation of the whole water pump of original structure needs 6 ~ 8 hours, and efficiency improves 33 ~ 50%, and the installation is simple and convenient, labour saving and time saving, alone can independently accomplish.

Example 2

A bag-in-bag condensate pump core package structure, the bag-in-bag condensate pump core package structure comprising a pump shaft 9, as shown in fig. 1-5, the bag-in-bag condensate pump core package structure comprising: the positioning shaft sleeve 10, the bearing 12, the guide shell 14, the bearing gland 16, the first fixing groove 18, the thrust ring 20 and the impeller 22; the positioning shaft sleeve 10 is arranged on the outer side of the pump shaft 9; the bearing 12 is arranged on the outer side of the positioning shaft sleeve 10; the guide shell 14 is arranged on the outer side of the bearing 12; the bearing gland 16 is arranged on the outer side of the pump shaft 9, the bearing gland 16 is connected with the bearing 12, and the bearing gland 16 is connected with the guide shell 14; the first fixing groove 18 is arranged on the outer wall of the pump shaft 9 along the circumferential direction of the pump shaft 9; the thrust ring 20 is embedded in the first fixing groove 18, the inner wall of the thrust ring 20 is attached to the pump shaft 9, and the outer wall of the thrust ring 20 is attached to the positioning shaft sleeve 10; the impeller 22 is arranged on the outer side of the pump shaft 9, the impeller 22 is connected with the positioning shaft sleeve 10, and the impeller 22 is attached to the thrust ring 20.

In the embodiment, the diameter of the cross section of the thrust collar 20 is 0.08 times of the diameter of the pump shaft 9, so that the thrust collar 20 has certain strength and rigidity, and meanwhile, the notch of the pump shaft 9 is ensured to have enough strength, thereby avoiding the damage of the pump shaft 9 due to stress concentration and prolonging the service life of the pump shaft 9.

The device of the embodiment is applied to a certain condensate pump in a trial mode, and the axial precision of a new structure is obviously improved compared with that of an old structure. The old structure uses a conical sleeve, the whole shaft is smooth, no positioning line exists, and the installation methods and the measured sizes of different workers have large deviation. The total error caused by the measuring method and the technical level of workers can reach about 1mm, the difference of 1mm is huge, and the quality of the pump body is difficult to ensure. The positioning of the new structure is that the positioning is carried out in the processing process of the shaft according to the requirements of a drawing, so that the axial precision is improved; and the parts are prepared for use after being inspected for qualification after being processed, so that the quality of the pump body is ensured.

Claims

1. A cartridge pocket condensate pump core package structure comprising a pump shaft (9), characterized in that it comprises:

the positioning shaft sleeve (10), the positioning shaft sleeve (10) is arranged on the outer side of the pump shaft (9);

a bearing (12), wherein the bearing (12) is installed on the outer side of the positioning shaft sleeve (10);

a guide shell (14), wherein the guide shell (14) is installed on the outer side of the bearing (12);

the bearing gland (16) is installed on the outer side of the pump shaft (9), the bearing gland (16) is connected with the bearing (12), and the bearing gland (16) is connected with the guide shell (14);

a first fixing groove (18), wherein the first fixing groove (18) is arranged on the outer wall of the pump shaft (9) along the circumferential direction of the pump shaft (9);

the thrust ring (20) is embedded into the first fixing groove (18), the inner wall of the thrust ring (20) is attached to the pump shaft (9), and the outer wall of the thrust ring (20) is attached to the positioning shaft sleeve (10);

the impeller (22) is installed on the outer side of the pump shaft (9), the impeller (22) is connected with the positioning shaft sleeve (10), and the impeller (22) is attached to the thrust ring (20).

2. The cartridge-bag-type condensate pump cartridge according to claim 1, further comprising:

a second fixing groove (24), wherein the second fixing groove (24) is arranged on the inner wall of the positioning shaft sleeve (10);

wherein the thrust ring (20) is simultaneously inserted into the first fixing groove (18) and the second fixing groove (24).

3. The cartridge-type condensate pump cartridge as claimed in claim 1, wherein:

the diameter of the section of the thrust ring (20) is 0.04-0.08 times of the diameter of the pump shaft (9).

4. The cartridge-type condensate pump cartridge as claimed in claim 1, wherein:

the thrust ring (20) is a 65Mn alloy body.

5. The cartridge-bag condensate pump cartridge of claim 2, further comprising:

a first screw (26), wherein after the first screw (26) passes through the bearing gland (16), the first screw (26) is connected with the guide shell (14).

6. The cartridge-bag condensate pump cartridge of claim 5, further comprising:

and the two ends of the positioning pin (28) are embedded into the bearing (12) and the bearing gland (16) at the same time.

7. The cartridge-bag condensate pump cartridge of claim 1, further comprising:

and a second screw (30), wherein after the second screw (30) passes through the positioning shaft sleeve (10), the second screw (30) is embedded into the impeller (22).

8. The cartridge-bag condensate pump cartridge of claim 7, further comprising:

a gasket (32), wherein the gasket (32) is arranged on the outer side of the second screw (30), and the gasket (32) is simultaneously attached to the second screw (30) and the positioning shaft sleeve (10).

9. The cartridge bag-type condensate pump cartridge structure according to any one of claims 1 to 8, wherein:

the impeller (22) is connected with the pump shaft (9) through a key.