Vertical double-suction double-turbine-shell self-sucking pump

Abstract

The utility model relates to the technical field of self-priming pumps, in particular to a vertical double-suction double-turbine-shell self-priming pump. The utility model discloses a vertical double-suction double-turbine-shell self-sucking pump which comprises a motor, a pump body and an inducer. A motor shaft of the motor is connected with a pump shaft of the pump body through a bearing; the pump shaft is sleeved with a double-suction impeller; and the inducer is arranged on the pump shaft in a sleeving manner and is positioned below the double-suction impeller. According to the vertical double-suction double-turbine-shell self-suction pump, the double-suction impeller in the pump body is driven to rotate through the arranged motor, so that water entering from the water inlet is continuously discharged from the water outlet, self-suction is achieved, the cavitation performance of the pump body during working is improved through the inducer arranged below the double-suction impeller, and the water suction capacity of the pump body is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of self-priming pumps, in particular to a vertical double-suction double-turbine shell self-priming pump. Background Art

[0002] There are many types of vertical self-priming pumps. There are strong self-priming pumps with diaphragm plunger pumps. The diaphragm pump is used to suck out the gas in the self-priming pump cavity before self-priming, and the structure is complicated. There are fully welded WFB type sealless self-priming pumps with auxiliary impellers. Although the structure is simple, the efficiency is very low. There are also vertical self-priming pumps with other structures, but the cavitation performance of the pump body is insufficient.

[0003] Therefore, how to improve the cavitation performance of the double-suction double-turbine shell self-priming pump is an urgent problem to be solved. Utility Model Content

[0004] In order to solve the technical problems mentioned in the background technology, the utility model provides a:

[0005] In a first aspect, the utility model provides a vertical double-suction double-turbine shell self-priming pump, comprising:

[0006] Motor, pump body and inducer;

[0007] The motor shaft of the motor is connected to the pump shaft of the pump body through a bearing;

[0008] A double-suction impeller is sleeved on the pump shaft; and

[0009] The inducer is sleeved on the pump shaft and is located below the double-suction impeller.

[0010] Furthermore, the pump body comprises a pump casing and a water inlet and a water outlet respectively arranged on both sides of the pump casing;

[0011] The interior of the pump housing is hollow to form a pump cavity;

[0012] An impeller cover plate is arranged in the pump chamber; wherein

[0013] The lower part of the impeller cover plate is the upper pump chamber, and the upper part of the impeller cover plate is the lower pump chamber.

[0014] Further, the upper pump chamber is connected to the water inlet, and the lower pump chamber is connected to the water outlet; and

[0015] The inducer is located in the upper pump cavity.

[0016] Furthermore, a one-way opening flap door is provided at the water inlet.

[0017] Furthermore, a double volute water pressure chamber is also provided in the lower pump chamber;

[0018] The double-suction impeller is arranged in the double-volute water pressure chamber.

[0019] Furthermore, a gap is left between the double-suction impeller and the inner wall of the double-volute water pressure chamber for water flow to pass through.

[0020] Furthermore, a bearing chamber for accommodating a bearing is also provided in the lower pump cavity.

[0021] Furthermore, the motor is located above the pump body and is connected to the pump body via a motor bracket.

[0022] The beneficial effect of the utility model is that the vertical double-suction double-turbine shell self-priming pump of the utility model drives the double-suction impeller in the pump body to rotate through the arranged motor, so that the water entering the water inlet is continuously discharged from the water outlet to realize self-priming, and the cavitation performance of the pump body during operation is improved by the inducer arranged under the double-suction impeller, thereby improving the water absorption capacity of the pump body.

[0023] Other features and advantages of the utility model will be described in the following description, and partly become apparent from the description, or understood by practicing the utility model. The purpose and other advantages of the utility model are realized and obtained by the structures particularly pointed out in the description and the drawings.

[0024] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0026] Figure 1 A schematic cross-sectional structure diagram of a vertical double-suction double-turbine shell self-priming pump according to some embodiments is shown.

[0027] In the figure:

[0028] Motor 1, motor shaft 11, pump body 2, impeller cover plate 20, upper pump chamber 21, lower pump chamber 22, pump shaft 23, inducer 3, water inlet 4, flap door 41, water outlet 5, double-suction impeller 6, double-volute water pressure chamber 7, motor bracket 8. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solution and advantages of the embodiments of the utility model clearer, the technical solution of the utility model will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0030] like Figure 1 As shown, at least one embodiment provides a vertical double-suction double-turbine shell self-priming pump, including: a motor 1, a pump body 2 and an inducer 3; the motor shaft 11 of the motor 1 is connected to the pump shaft 23 of the pump body 2 through a bearing; a double-suction impeller 6 is sleeved on the pump shaft 23; and the inducer 3 is sleeved on the pump shaft 23 and is located below the double-suction impeller 6.

[0031] In some embodiments, the double-suction impeller 6 in the pump body 2 is driven to rotate by the motor 1, so that the water entering the water inlet 4 is continuously discharged from the water outlet 5 to achieve self-priming, and the cavitation performance of the pump body 2 during operation is improved by the inducer 3 arranged below the double-suction impeller 6, thereby improving the water absorption capacity of the pump body 2.

[0032] In some embodiments, the pump body 2 includes a pump casing and a water inlet 4 and a water outlet 5 respectively arranged on both sides of the pump casing; the interior of the pump casing is hollow to form a pump cavity; an impeller cover plate 20 is arranged in the pump cavity; the lower part of the impeller cover plate 20 is an upper pump cavity 21, and the upper part of the impeller cover plate 20 is a lower pump cavity 22. A gap is left between the impeller cover plate 20 and the double-suction impeller 6, so that the gas-liquid mixture in the pump body 2 can flow back through the gap.

[0033] In some embodiments, the upper pump chamber 21 is connected to the water inlet 4, and the lower pump chamber 22 is connected to the water outlet 5; and the inducer 3 is located in the upper pump chamber 21 and at the inlet of the double-suction impeller 6, so that the cavitation performance of the pump body 2 is enhanced by inducing the rotation of the inducer 3.

[0034] In some embodiments, a one-way opening flap gate 41 is provided at the water inlet 4. When the pump is started, the gas in the suction pipeline enters the pump cavity through the water inlet 4 to push open the flap gate 41, and the gas and water in the pump body 2 are mixed. When the pump is stopped, the instantaneous reflux pressure causes the flap gate 41 to close, so that the water is stored in the pump body 2, and there is no need to fill water when starting next time.

[0035] In some embodiments, a double volute water pressure chamber 7 is further provided in the lower pump chamber 22; the double suction impeller 6 is provided in the double volute water pressure chamber 7. A gap for water flow is left between the double suction impeller 6 and the inner wall of the double volute water pressure chamber 7. Thus, water passing through the double suction impeller 6 and the double volute water pressure chamber 7 is continuously discharged from the inlet to the outlet.

[0036] In some embodiments, a bearing chamber for accommodating bearings is also provided in the lower pump chamber 22. Considering the long cantilever of the impeller, a bearing structure is added to make the operation more reliable. Oil is injected into the sealing chamber to cool and lubricate the seal, and no additional cooling and lubrication water source is required on site.

[0037] In some embodiments, the motor 1 is located above the pump body 2 and is connected to the pump body 2 via a motor bracket 11 .

[0038] In summary, the vertical double-suction double-turbine shell self-priming pump of the utility model drives the double-suction impeller 6 in the pump body 2 to rotate through the motor 1, so that the water entering the water inlet 4 is continuously discharged from the water outlet 5 to achieve self-priming, and the cavitation performance of the pump body 2 during operation is improved by the inducer 3 arranged below the double-suction impeller 6, thereby improving the water absorption capacity of the pump body 2.

[0039] In the description of the embodiments of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it 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 it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0040] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0041] Based on the above ideal embodiments of the utility model, the relevant staff can make various changes and modifications without deviating from the technical concept of the utility model through the above description. The technical scope of the utility model is not limited to the content of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A vertical double-suction double-turbine shell self-priming pump, characterized in that: include: Motor, pump body and inducer; The motor shaft of the motor is connected to the pump shaft of the pump body through a bearing; A double-suction impeller is sleeved on the pump shaft; and The inducer is sleeved on the pump shaft and is located below the double-suction impeller; The pump body comprises a pump casing and a water inlet and a water outlet respectively arranged on both sides of the pump casing; The interior of the pump housing is hollow to form a pump cavity; An impeller cover plate is arranged in the pump chamber; The lower part of the impeller cover plate is the upper pump chamber, and the upper part of the impeller cover plate is the lower pump chamber.

2. The vertical double-suction double-turbine shell self-priming pump according to claim 1, characterized in that: The upper pump chamber is connected to the water inlet, and the lower pump chamber is connected to the water outlet; and The inducer is located in the upper pump cavity.

3. The vertical double-suction double-turbine shell self-priming pump according to claim 2, characterized in that: A one-way opening flap door is arranged at the water inlet.

4. The vertical double-suction double-turbine shell self-priming pump according to claim 3, characterized in that: A double volute water pressure chamber is also provided in the lower pump chamber; The double-suction impeller is arranged in the double-volute water pressure chamber.

5. The vertical double-suction double-turbine shell self-priming pump according to claim 4, characterized in that: A gap is left between the double-suction impeller and the inner wall of the double-volute water pressure chamber for water flow to pass through.

6. The vertical double-suction double-turbine shell self-priming pump according to claim 5, characterized in that: A bearing chamber for accommodating a bearing is also provided in the lower pump cavity.

7. The vertical double-suction double-turbine shell self-priming pump according to claim 6, characterized in that: The motor is located above the pump body and is connected to the pump body via a motor bracket.

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