Sewage pump for oil-cooled lifter

Abstract

The utility model relates to the technical field of sewage treatment, and discloses a sewage pump for an oil-cooled lifter. The sewage pump for the oil cooling type lifter comprises a pump body, a motor, a motor shell and an outer shell, the motor shell is arranged on the pump body, the motor is arranged in the motor shell, an output shaft of the motor extends into a pump cavity of the pump body and is connected with an impeller of the pump body, the outer shell is arranged on the outer side of the motor shell in a sleeved mode and is connected with the pump body in a sealed mode, and an interlayer is arranged between the outer shell and the motor shell. And cooling engine oil is filled in the interlayer. According to the sewage pump for the oil-cooled lifter, the motor is arranged in the motor shell, the outer shell is arranged on the outer side of the motor shell in a sleeved mode, the interlayer between the outer shell and the motor shell is filled with the cooling machine oil, when the motor works, the motor shell is cooled through the oil-cooled interlayer, heat is finally taken away through liquid in the pump body, the motor is cooled, and the service life of the motor is prolonged. The heat dissipation effect of the motor is improved, high efficiency and reliability of the dry type motor are considered, and the service life of the motor and the sewage pump is prolonged.

Description

Technical Field

[0001] The embodiment of the utility model relates to the technical field of sewage treatment, and in particular to a sewage pump for an oil-cooled lifter. Background Art

[0002] Domestic sewage in many places flows into underground collecting tanks through drainage pipes. Sewage lifting devices (lifters) such as sewage pumps, connecting pipes and control mechanisms are installed in the collecting tanks. The sewage in the collecting tanks is lifted and pumped out by the sewage pumps, so that the sewage is incorporated into the urban sewage network and then transported to the sewage treatment center for centralized treatment.

[0003] The sewage pump is integrated with a motor, which drives the impeller of the sewage pump to rotate, thereby discharging the sewage.

[0004] The inventors of the present application have discovered that the motor on the current sewage pump is generally cooled by air cooling, which has a poor heat dissipation effect and affects the service life of the motor and the sewage pump. Utility Model Content

[0005] The purpose of the utility model is to provide an oil-cooled sewage pump for a lifter to solve the problems in the above-mentioned background technology.

[0006] The embodiment of the utility model provides an oil-cooled lifter sewage pump, comprising: a pump body, a motor, a motor housing and an outer shell;

[0007] The motor housing is arranged on the pump body;

[0008] The motor is arranged in the motor housing, and the output shaft of the motor extends out of the motor housing and extends into the pump cavity of the pump body, and is connected to the impeller of the pump body to drive the impeller to rotate. The output shaft is sealed with the motor housing and the pump body;

[0009] The outer shell is sleeved on the outside of the motor shell and is sealed with the pump body;

[0010] An interlayer is provided between the outer shell and the motor shell, and the interlayer is filled with cooling oil for cooling the motor.

[0011] Based on the above scheme, it can be known that the oil-cooled sewage pump for the lifter of the present invention is provided with a pump body, a motor, a motor housing and an outer shell. The motor housing is provided on the pump body, the motor is provided in the motor housing, the output shaft of the motor extends into the pump cavity of the pump body and is connected to the impeller of the pump body. The outer shell is sleeved on the outside of the motor housing and is sealed with the pump body. An interlayer is provided between the outer shell and the motor housing, and the interlayer is filled with cooling oil. The oil-cooled sewage pump for the lifter of the present invention has a motor provided in the motor housing, and the interlayer between the outer shell and the motor housing is filled with cooling oil. When the motor is working, the motor housing is cooled by the oil-cooling interlayer, and the heat is finally taken away by the liquid in the pump body to cool the motor, thereby improving the heat dissipation effect of the motor, and taking into account the high efficiency and reliability of the dry motor, thereby extending the service life of the motor and the sewage pump.

[0012] In a feasible solution, the pump body is provided with a sealing cover;

[0013] The output shaft is arranged on the sealing cover;

[0014] The motor housing is provided with a protruding ring, and the protruding ring is provided with a plurality of arc-shaped notches;

[0015] The protruding ring is supported on the pump body, a sealing oil cavity is formed between the sealing cover and the end surface of the motor housing, and the arc-shaped notch is used to connect the interlayer with the sealing oil cavity.

[0016] In a feasible solution, the sealing cover is provided with a fixed retaining ring;

[0017] The fixed retaining ring is arranged on the pump body through a fixing bolt, and a first O-type sealing ring is arranged between the fixed retaining ring and the pump body.

[0018] In a feasible solution, the motor housing is provided with a plurality of mounting posts on the inner side of the protruding ring, and the mounting posts are provided with threaded holes, so that the motor housing is set on the pump body through fixing bolts.

[0019] In a feasible solution, a plurality of heat dissipation ribs are evenly distributed on the circumferential side wall of the motor housing.

[0020] In a feasible solution, the motor housing and the outer shell are both conical;

[0021] The tapered large end of the housing is connected to the pump body;

[0022] The conical small end of the motor housing is connected to the pump body, and the conical large end of the motor housing is provided with a mounting groove, in which a second O-type sealing ring is provided, and the second O-type sealing ring is abutted against the outer shell.

[0023] In a feasible solution, the conical large end of the housing is provided with a flange portion;

[0024] The pump body is provided with a fixing boss, and the flange portion is fixed on the fixing boss by fixing bolts.

[0025] In a feasible solution, a third O-ring is provided between the flange portion and the fixing boss.

[0026] In a feasible solution, the motor housing is made of aluminum alloy and is formed by die-casting. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following is a brief introduction to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0028] Figure 1 Schematic cross-sectional view of an oil-cooled lifter sewage pump in an embodiment of the present utility model;

[0029] Figure 2 In the embodiment of the present utility model Figure 1 A partial enlarged view of the

[0030] Figure 3 Schematic diagram of a sewage pump for an oil-cooled lifter in an embodiment of the present utility model;

[0031] Figure 4 Schematic diagram of the motor housing in an embodiment of the present invention.

[0032] Numbers in the figure:

[0033] 1. Pump body; 11. Impeller; 12. Sealing cover; 13. Fixed boss; 121. Fixed retaining ring; 2. Motor; 21. Output shaft; 3. Motor housing; 31. Projecting ring; 32. Arc-shaped notch; 33. Mounting column; 34. Heat dissipation rib; 35. Mounting groove; 4. Housing; 41. Flange; 5. Interlayer; 61. First O-ring; 62. Second O-ring; 63. Third O-ring. DETAILED DESCRIPTION

[0034] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0035] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0036] In this utility model, unless otherwise specified or limited, the terms "installed," "connected," "connected," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection, or communication connection; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. For those skilled in the art, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0037] The following specific embodiments are used to describe the technical solution of the present invention in detail. The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described in detail in some embodiments.

[0038] As described in the background technology of this application, domestic sewage in many places flows into a water collecting tank buried underground through drainage pipes. A lift is provided on the water collecting tank, and a motor is integrated on the sewage pump of the lift. The motor drives the impeller of the sewage pump to rotate, thereby discharging the sewage.

[0039] The inventors of the present application have discovered that the motor on the current sewage pump is generally cooled by air cooling, which has a poor heat dissipation effect and affects the service life of the motor and the sewage pump.

[0040] In order to solve the above problems, the inventors of this application have proposed the technical solution of this application, and the specific embodiments are as follows:

[0041] Figure 1 This is a cross-sectional schematic diagram of an oil-cooled lifter sewage pump in an embodiment of the present utility model. Figure 2 In the embodiment of the present utility model Figure 1 A partial enlarged view of Figure 3 This is a schematic diagram of an oil-cooled lifter sewage pump in an embodiment of the present utility model. Figure 4 Schematic diagram of the motor housing in an embodiment of the present invention.

[0042] like Figures 1 to 4 As shown, the oil-cooled lifter sewage pump of this embodiment includes: a pump body 1, a motor 2, a motor housing 3 and an outer housing 4.

[0043] The motor housing 3 is arranged on the pump body 1 .

[0044] The motor 2 is sleeved within the motor housing 3. The output shaft 21 of the motor 2 extends out of the lower end surface of the motor housing 3 and into the pump chamber of the pump body 1. It is fixedly connected to the impeller 11 of the pump body 1. When the motor 2 is in operation, the output shaft 21 drives the impeller 11 of the pump body 1 to rotate. The output shaft 21 of the motor 2 and the motor housing 3, as well as the output shaft 21 of the motor 2 and the pump body 1, are both sealed by mechanical seals.

[0045] The outer shell 4 is sleeved on the outer circumference of the motor shell 3 , and the bottom end of the outer shell 4 is fixedly connected to the pump body 1 .

[0046] An interlayer 5 is provided between the inner circumferential wall of the housing 4 and the outer circumferential wall of the motor housing 3. Cooling oil is filled in the interlayer 5. When the motor 2 is operating, the cooling oil in the interlayer 5 cools the motor housing 3, removing heat from the motor 2 and cooling the motor 2.

[0047] From the above, it is not difficult to find that the oil-cooled lifter sewage pump of this embodiment is provided with a pump body, a motor, a motor housing and an outer shell. The motor housing is provided on the pump body, the motor is provided in the motor housing, the output shaft of the motor extends into the pump cavity of the pump body and is connected to the impeller of the pump body. The outer shell is sleeved on the outside of the motor housing and is sealed with the pump body. An interlayer is provided between the outer shell and the motor housing, and the interlayer is filled with cooling oil. In the oil-cooled lifter sewage pump of this embodiment, the motor is provided in the motor housing, and the interlayer between the outer shell and the motor housing is filled with cooling oil. When the motor is working, the motor housing is cooled by the oil-cooling interlayer, and the heat is eventually carried away by the liquid in the pump body, cooling the motor, improving the heat dissipation effect of the motor, and taking into account the high efficiency and reliability of the dry motor, thereby extending the service life of the motor and the sewage pump.

[0048] Optional, such as Figure 2 、 Figure 4 As shown, in the oil-cooled lifter sewage pump in this embodiment, the pump body 1 is provided with a sealing cover 12 at the top end of the pump chamber.

[0049] The output shaft 21 of the motor 2 is passed through the sealing cover 12 of the pump body 1 , extends into the pump cavity of the pump body 1 , and is fixedly connected to the impeller 11 in the pump cavity.

[0050] A protruding ring 31 is provided on the bottom end surface of the motor housing 3 , and a plurality of arc-shaped notches 32 are evenly distributed along the circumferential direction on the protruding ring 31 of the motor housing 3 .

[0051] The protruding ring 31 of the motor housing 3 abuts against the pump body 1 , and a sealing oil chamber is formed between the end surface of the motor housing 3 and the sealing cover 12 of the pump body 1 , and the sealing oil chamber is filled with sealing oil (cooling oil).

[0052] Interlayer 5 between outer shell 4 and motor housing 3 communicates with the seal oil chamber via an arc-shaped notch 32 in motor housing 3, increasing the amount of cooling oil. Rotation of output shaft 21 of motor 2 drives the cooling oil in interlayer 5 and the seal oil chamber to circulate, ultimately removing heat through the liquid in the pump chamber, cooling the cooling oil. This significantly improves the cooling efficiency of the motor and extends the service life of both the motor and the sewage pump.

[0053] Furthermore, in the oil-cooled lifter sewage pump in this embodiment, a fixed retaining ring 121 is provided on the circumferential outer wall of the sealing cover 12, and the fixed retaining ring 121 is provided with a plurality of fixing holes.

[0054] The pump body 1 is provided with a plurality of threaded holes. The fixed retaining ring 121 of the sealing cover 12 is fixed to the pump body 1 by fixing bolts. A first O-ring 61 is provided between the fixed retaining ring 121 and the pump body 1 to ensure the sealing of the machine seal oil chamber.

[0055] Furthermore, in the oil-cooled lifter sewage pump in this embodiment, the motor housing 3 is provided with a plurality of mounting posts 33 on the inner side of the protruding ring 31 , and the mounting posts 33 are provided with threaded holes.

[0056] The pump body 1 is provided with a plurality of connection holes, so that the motor housing 3 is fixed to the pump body 1 by fixing bolts.

[0057] Optionally, in the oil-cooled lifter sewage pump in this embodiment, a plurality of heat dissipation ribs 34 are evenly distributed on the circumferential side wall of the motor housing 3 .

[0058] The heat dissipation ribs 34 extend along the axial direction of the motor housing 3 . The heat dissipation ribs 34 increase the contact area between the motor housing 3 and the cooling oil, thereby accelerating the heat dissipation of the motor 2 .

[0059] Optionally, in the oil-cooled lifter sewage pump in this embodiment, the motor housing 3 and the outer housing 4 are both conical.

[0060] The conical large end of the housing 4 is arranged downward and is fixedly connected to the pump body 1 .

[0061] The motor housing 3 is provided with a mounting groove 35 on the circumferential outer wall of the tapered large end. A second O-ring 62 is embedded in the mounting groove 35 of the motor housing 3 .

[0062] The conical small end of the motor housing 3 is set downward and is fixedly connected to the pump body 1. The conical large end of the motor housing 3 is set upward, and the second O-ring 62 abuts against the circumferential inner wall of the outer shell 4, so that the top end of the motor housing 3 and the outer shell 4 are sealed, thereby forming an interlayer 5 between the motor housing 3 and the outer shell 4.

[0063] Furthermore, in the oil-cooled lifter sewage pump of this embodiment, the housing 4 is provided with a flange portion 41 at the conical large end at the bottom, and the housing 4 is provided with a plurality of mounting through holes in the flange portion 41 .

[0064] A fixing boss 13 is provided on the top of the pump body 1 . The pump body 1 is provided with a plurality of threaded holes on the fixing boss 13 . The flange portion 41 of the housing 4 is fixed to the threaded holes of the fixing boss 13 of the pump body 1 by fixing bolts.

[0065] Furthermore, in the oil-cooled lifter sewage pump of this embodiment, a third O-ring 63 is provided between the flange portion 41 of the housing 4 and the fixed boss 13 of the pump body 1 to ensure the sealing of the interlayer 5 .

[0066] Furthermore, in the oil-cooled lifter sewage pump in this embodiment, the motor housing 3 is made of aluminum alloy and is integrally formed by die-casting.

[0067] In the present invention, unless otherwise clearly specified and limited, a first feature being "on" or "under" a second feature may mean that the first feature and the second feature are in direct contact, or the first feature and the second feature are in indirect contact through an intermediate medium.

[0068] Furthermore, when a first feature is “above,” “above,” or “above” a second feature, it may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. When a first feature is “below,” “below,” or “below” a second feature, it may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0069] In the description of this specification, reference to the terms "one embodiment", "some embodiments", "example", "specific example" or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and the features of different embodiments or examples without contradiction.

[0070] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. An oil-cooled sewage pump for a lift, characterized in that: include: Pump body, motor, motor housing and casing; The motor housing is arranged on the pump body; The motor is arranged in the motor housing, and the output shaft of the motor extends out of the motor housing and extends into the pump cavity of the pump body, and is connected to the impeller of the pump body to drive the impeller to rotate. The output shaft is sealed with the motor housing and the pump body; The outer shell is sleeved on the outside of the motor shell and is sealed with the pump body; An interlayer is provided between the outer shell and the motor shell, and the interlayer is filled with cooling oil for cooling the motor.

2. The oil-cooled lifter sewage pump according to claim 1, characterized in that: The pump body is provided with a sealing cover; The output shaft is arranged on the sealing cover; The motor housing is provided with a protruding ring, and the protruding ring is provided with a plurality of arc-shaped notches; The protruding ring is supported on the pump body, a sealing oil cavity is formed between the sealing cover and the end surface of the motor housing, and the arc-shaped notch is used to connect the interlayer with the sealing oil cavity.

3. The oil-cooled lifter sewage pump according to claim 2, characterized in that: The sealing cover is provided with a fixed retaining ring; The fixed retaining ring is arranged on the pump body through a fixing bolt, and a first O-type sealing ring is arranged between the fixed retaining ring and the pump body.

4. The oil-cooled lifter sewage pump according to claim 2, characterized in that: The motor housing is provided with a plurality of mounting posts on the inner side of the protruding ring. The mounting posts are provided with threaded holes so that the motor housing can be arranged on the pump body through fixing bolts.

5. The oil-cooled lifter sewage pump according to claim 1, characterized in that: The circumferential side wall of the motor housing is evenly distributed with a plurality of heat dissipation ribs.

6. The oil-cooled lifter sewage pump according to claim 1, characterized in that: The motor housing and the outer shell are both conical; The tapered large end of the housing is connected to the pump body; The conical small end of the motor housing is connected to the pump body, and the conical large end of the motor housing is provided with a mounting groove, in which a second O-type sealing ring is provided, and the second O-type sealing ring is abutted against the outer shell.

7. The oil-cooled lifter sewage pump according to claim 1, characterized in that: The conical large end of the housing is provided with a flange portion; The pump body is provided with a fixing boss, and the flange portion is fixed on the fixing boss by fixing bolts.

8. The oil-cooled lifter sewage pump according to claim 7, characterized in that: A third O-ring is provided between the flange portion and the fixing boss.

9. The oil-cooled lifter sewage pump according to any one of claims 1 to 8, characterized in that: The motor housing is made of aluminum alloy and is formed by die-casting.

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