Integrated mechanical seal pump

Abstract

The utility model discloses an integrated mechanical seal pump which comprises a pump shell, a spacer sleeve, a bearing gland, a connecting bearing and an integrated mechanical seal shell. The connecting bearing is longitudinally inserted in the pump shell, and the connecting bearing is located in the pump shell and sleeved with the bearing gland. The spacer sleeve is sleeved with a bearing gland, the spacer sleeve is attached to the peripheral side of the connecting bearing in a sealed mode, the spacer sleeve is connected with the bearing gland in a sealed mode, and an integrated mechanical sealing shell is integrally formed on the surface of the connecting bearing on one side of the spacer sleeve. Wool sticky sealing and water retaining ring water retaining are changed into the retaining sleeve and the integrated mechanical seal, so that the requirement for axial adjustment of the assembly position is not high, meanwhile, the assembly difficulty is simplified, the assembly cost is reduced, the assembly efficiency is improved, and the pump maintenance frequency is reduced.

Description

Technical Field

[0001] This utility model relates to the field of dual-suction pump technology, specifically an integrated mechanical seal pump. Background Technology

[0002] Modern dual-suction pumps of this type feature symmetrical suction inlets on both sides of the impeller, allowing liquid to enter simultaneously from both sides. The symmetrical impeller shape and identical flow channels on both sides ensure balanced flow. The high-speed rotating impeller performs work on the liquid, and centrifugal force propels the liquid from the center to the outer edge, increasing kinetic and pressure energy. The volute casing uses a volute design to collect the liquid ejected by the impeller. Liquid ejected from both sides of the impeller converges within the casing, is decelerated and pressurized in the diffuser section, and then discharged from a single outlet. Finally, axial balance through the connecting bearing ensures symmetrical pressure distribution on both sides of the bearing, counteracting axial thrust and reducing the load on the connecting bearing.

[0003] Dual-suction pumps are now quite common; please refer to [link / reference needed]. Figure 1 ,like Figure 1 As shown, the bearing cap inner hole uses wool adhesive seal and water-blocking ring to block water. This structure makes the wool adhesive seal easy to fall off and the water-blocking ring easy for water to enter the bearing. In addition, the mechanical seal is a simple old-fashioned ZU mechanical seal with a high requirement for left and right alignment of the impeller. If it is not installed properly, the mechanical seal is prone to leakage. Utility Model Content

[0004] The purpose of this utility model is to provide an integrated mechanical seal pump to solve the problems mentioned in the background art, which use wool adhesive seal and water-blocking ring to block water in the inner hole of the bearing cover of the double suction pump. The wool adhesive seal is easy to fall off and the water-blocking ring makes the bearing easy to get water in. In addition, the mechanical seal is a simple old-fashioned ZU mechanical seal with high requirements for the left and right alignment of the impeller. If it is not installed properly, the mechanical seal is prone to leakage.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an integrated mechanical seal pump, comprising a pump housing, a retaining sleeve, a bearing cover, a connecting bearing, and an integrated mechanical seal housing; a connecting bearing is longitudinally inserted into the pump housing, and a bearing cover is sleeved on the connecting bearing within the pump housing; the retaining sleeve is sleeved within the bearing cover, and the retaining sleeve and the connecting bearing are sealed together on their periphery, and the retaining sleeve and the bearing cover are sealed together; an integrated mechanical seal housing is integrally formed on the surface of the connecting bearing on one side of the retaining sleeve.

[0006] Preferably, the pump housing includes two inner supports sleeved on the outside of the connecting bearing, and the inner supports are mirror-shaped inside the pump housing.

[0007] Preferably, each of the inner supports has a bearing cap inner hole, and the bearing cap inner hole is sleeved with the bearing cap and the integrated machine seal shell.

[0008] Preferably, the pump housing includes a volute that is fitted onto the outside of the inner support. The volute has a snail-shaped design and is fitted onto the outside of the inner support. The volute and the inner support are detachably connected.

[0009] Preferably, an impeller is provided inside the volute, the impeller is symmetrically distributed along the connecting bearing, and the impeller and the connecting bearing are detachably connected.

[0010] Preferably, the bottom of the inner support is detachably connected to a support base for supporting the inner support and the volute, the support base having a passage chamber for fluid passage.

[0011] Preferably, one end of the connecting bearing extends outside the pump housing, and an inner shaft is connected to the end of the connecting bearing away from the pump housing. A power source is provided at the end of the inner shaft away from the connecting bearing.

[0012] Preferably, the bottom of the support base is connected to a fixed base, and the fixed base has a locking thread groove.

[0013] Compared with the prior art, the beneficial effects of this utility model are: by replacing the wool adhesive seal and water-blocking ring with a baffle and an integrated mechanical seal, this type of integrated mechanical seal pump simplifies the assembly process, reduces assembly difficulty, lowers assembly costs, improves assembly efficiency, and reduces pump maintenance frequency, while also reducing the axial adjustment requirements at the assembly position. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the main structure of this utility model;

[0015] Figure 2 This is a cross-sectional structural diagram of the present invention;

[0016] Figure 3 This is a top view of the structure of this utility model;

[0017] In the picture:

[0018] 1. Pump casing; 11. Support base; 12. Impeller; 13. Volute; 14. Inner bracket; 2. Fixed base; 21. Locking thread groove; 3. Integrated mechanical seal; 4. Sleeve; 5. Bearing cover; 6. Inner hole of bearing cover; 7. Connecting bearing; 8. Inner shaft. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] Example 1

[0021] like Figures 1-3 As shown, an integrated mechanical seal pump includes a pump housing 1, a retaining sleeve 4, a bearing cap 55, a connecting bearing 7, and an integrated mechanical seal housing 3. The connecting bearing 7 is longitudinally inserted into the pump housing 1, and the bearing cap 55 is fitted inside the pump housing 1 to seal the connection between the connecting bearing 7 and the pump housing 1, reducing the probability of fluid from the pump housing 1 entering the connecting bearing 7 and being contaminated by the lubricating oil on the surface of the connecting bearing 7. The retaining sleeve 4 is fitted inside the bearing cap 5, and the retaining sleeve 4 and the connecting bearing 7 are sealed together. The retaining sleeve 4 and the bearing cap 55 are sealed together. An integrated mechanical seal housing 3 is integrally formed on the surface of the connecting bearing 7 on one side of the retaining sleeve 4. The integrally formed integrated mechanical seal housing 3 simplifies assembly and reduces assembly costs.

[0022] The effect achieved by the entire first embodiment is that it will Figure 1 The bearing cap inner hole 6 uses wool adhesive sealing and water-blocking ring to block water, and the design of connecting bearing 7 and integrated machine seal 3 is changed to a one-piece molding design. The axial adjustment requirements of the assembly position are not high, which simplifies the assembly difficulty, reduces the assembly cost, improves the assembly efficiency, and reduces the pump maintenance frequency.

[0023] Example 2

[0024] like Figures 2-3 As shown, an integrated mechanical seal pump includes a retaining sleeve 4, an integrated mechanical seal housing 3, a bearing cover inner hole 6, a bearing cover 55, a volute 13, an impeller 12, and an inner support 14. The pump housing 1 includes two inner supports 14 sleeved on the outside of the connecting bearing 7. The inner supports 14 are designed in a mirror image inside the pump housing 1. The inner supports 14 are used to limit the position of the connecting bearing 7 inside the pump housing 1, provide rotation space and support force for the connecting bearing 7, and facilitate the connecting bearing 7 to drive the impeller 12 to rotate.

[0025] The inner support 14 is provided with a bearing cover inner hole 6. The bearing cover inner hole 6, the bearing cover 55, and the integrated machine seal 3 are fitted together. When in use, the bearing cover inner hole 6 is used to place the retaining sleeve 4 and the integrated machine seal 3. At the same time, the inner support 14 and the bearing cover inner hole 6 cover the connecting part on the connecting bearing 7, reducing the probability of fluid contact between the connecting bearing 7 and the impeller 12.

[0026] Pump housing 1 includes a volute 13 that is fitted onto the outside of the inner support 14. The volute 13 has a volute-shaped design and is fitted onto the outside of the inner support 14. The volute 13 and the inner support 14 are detachably connected. The volute 13 adopts a volute-shaped design and is used to collect the liquid thrown out by the impeller 12 during use.

[0027] An impeller 12 is provided inside the volute 13. The impeller 12 is symmetrically distributed along the connecting bearing 7. The impeller 12 and the connecting bearing 7 are detachably connected. The shape of the impeller 12 is symmetrical, and the flow channels on both sides are designed in the same way to ensure balanced flow. The high-speed rotating impeller 12 does work on the liquid. The centrifugal force throws the liquid from the center of the impeller 12 to the outer edge, increasing the kinetic energy and pressure energy.

[0028] The bottom of the inner support 14 is detachably connected to a support base 11 for supporting the inner support 14 and the volute 13. The support base 11 has a passage chamber for fluid to pass through, which is the double suction port of the double suction pump.

[0029] One end of the connecting bearing 7 extends to the outside of the pump housing 1. The end of the connecting bearing 7 away from the pump housing 1 is connected to an inner shaft 8. The end of the inner shaft 8 away from the connecting bearing 7 is provided with a power source. The power source can be a three-phase asynchronous motor, a diesel engine, a steam turbine, etc. The specific choice depends on the application scenario, energy supply, environmental conditions, and other factors when the equipment is used.

[0030] The bottom of the support base 11 is connected to a fixed base 2, which has a locking thread groove 21. The fixed base 2 is connected to the object to be connected through the locking thread groove 21.

[0031] The overall effect of Embodiment 2 is as follows: Symmetrical suction inlets are provided on both sides of the passage chamber, allowing liquid to enter simultaneously from both sides. Symmetrical impellers 12 are designed with identical shapes and flow channels on both sides to ensure balanced flow. The high-speed rotating impellers 12 perform work on the liquid, and centrifugal force throws the liquid from the center of the impeller 12 to the outer edge, increasing kinetic and pressure energy. The volute 13 adopts a volute design and is used to collect the liquid thrown out by the impellers 12. The liquid thrown out from both sides of the impeller 12 converges in the volute 13, and after deceleration and pressurization in the diffuser section, it is discharged from a single outlet. Finally, the axial balance of the connecting bearing 7 ensures symmetrical pressure distribution on both sides of the connecting bearing 7, offsetting the axial thrust and reducing the load on the connecting bearing 7.

[0032] Working Principle: When using this integrated mechanical seal pump, check that all components are in good working order and connect the power supply. Firstly, symmetrical suction inlets are located on both sides of the flow chamber, allowing liquid to enter simultaneously from both sides. Symmetrical impellers 12 are also designed, with symmetrical shapes and identical flow channels on both sides to ensure balanced flow. The high-speed rotating impellers 12 perform work on the liquid, and centrifugal force throws the liquid from the center of the impeller 12 to the outer edge, increasing kinetic and pressure energy. The volute 13 adopts a volute design. During operation, the volute 13 collects the liquid thrown out by the impellers 12. The liquid thrown out from both sides of the impeller 12 converges within the volute 13, and after deceleration and pressurization in the diffuser section, it is discharged from a single outlet. Finally, axial balance through the connecting bearing 7 ensures symmetrical pressure distribution on both sides of the connecting bearing 7, offsetting axial thrust and reducing the load on the connecting bearing 7.

[0033] Secondly, when using it, Figure 1 The bearing cap inner hole 6 in the middle adopts wool adhesive sealing and water blocking ring to block water, and is changed to a retaining sleeve 4. The design of connecting bearing 7 and integrated mechanical seal shell 3 is changed to one-piece molding. The axial adjustment requirements of the assembly position are not high, which simplifies the assembly difficulty, reduces the assembly cost, improves the assembly efficiency and reduces the pump maintenance frequency, and finally completes the work of the integrated mechanical seal pump.

[0034] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0035] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. An integrated mechanical seal pump, characterized in that, include: A pump housing, in which a connecting bearing is longitudinally inserted, and a bearing cap is fitted inside the pump housing; A retaining sleeve is fitted inside the bearing cover. The retaining sleeve and the peripheral side of the connecting bearing are sealed and fitted together. The retaining sleeve and the bearing cover are sealed and connected. An integral machine seal is integrally formed on the surface of the connecting bearing on one side of the retaining sleeve.

2. The integrated mechanical seal pump according to claim 1, characterized in that: The pump housing includes two inner supports sleeved on the outside of the connecting bearing, and the inner supports are designed in a mirror shape inside the pump housing.

3. The integrated mechanical seal pump according to claim 2, characterized in that: Each of the inner supports has a bearing cover inner hole, and the bearing cover inner hole is connected to the bearing cover and the integrated machine seal shell.

4. The integrated mechanical seal pump according to claim 3, characterized in that: The pump housing includes a volute that is fitted onto the outside of the inner support. The volute has a snail-shaped design and is fitted onto the outside of the inner support. The volute and the inner support are detachably connected.

5. The integrated mechanical seal pump according to claim 4, characterized in that: An impeller is provided inside the volute, and the impeller is symmetrically distributed along the connecting bearing. The impeller and the connecting bearing are detachably connected.

6. The integrated mechanical seal pump according to claim 5, characterized in that: The bottom of the inner support is detachably connected to a support base for supporting the inner support and the volute, the support base having a passage chamber for fluid passage.

7. The integrated mechanical seal pump according to claim 6, characterized in that: One end of the connecting bearing extends outside the pump housing, and an inner shaft is connected to the end of the connecting bearing away from the pump housing. A power source is provided at the end of the inner shaft away from the connecting bearing.

8. The integrated mechanical seal pump according to claim 7, characterized in that: The bottom of the support is connected to a fixed base, which has a locking thread groove.

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