Multifunctional centrifugal pump structure

Abstract

The invention discloses a multifunctional centrifugal pump structure, and relates to the technical field of centrifugal pumps, the multifunctional centrifugal pump structure comprises a pump body, an impeller and a worm cavity are arranged in the pump body, a stepless pressure regulating assembly used for regulating the relative position of the impeller and the worm cavity is arranged in the pump body, a wheel shaft capable of being assembled with the stepless pressure regulating assembly is rotatably connected in the pump body, and the wheel shaft is connected with the impeller. According to the centrifugal pump, the stepless pressure regulating assembly is additionally arranged, the wheel shaft on which the stepless pressure regulating assembly can be assembled is used, that is, the length of the wheel shaft is increased, and the relative position relation between the impeller and the outlet is adjusted by increasing the length of the wheel shaft and using the stepless pressure regulating assembly, so that the centrifugal pump capable of meeting various hydraulic performance requirements is generated; the problems that according to a traditional centrifugal pump structure, a wheel shaft is short in length, the wheel shaft is completely fixed after being assembled with the impeller and a gland nut, and the position of the impeller and the pressure cannot be adjusted are solved under the condition that various specific different impeller, pump body and motor assembling combinations or various types of centrifugal pumps are needed.

Description

Technical Field

[0001] The invention relates to the technical field of centrifugal pumps, in particular to a multifunctional centrifugal pump structure. Background Art

[0002] A pump is a machine that transports fluids or pressurizes fluids. It transfers the mechanical energy of the prime mover or other external energy to the liquid to increase the energy of the liquid. The pump is mainly used to transport liquids. A centrifugal pump is a typical new type of pump, mainly used for aviation fuel filling, with high flow rate, pressure and speed. Since the aircraft fuel tank is relatively large and located relatively high, a large flow rate and high pressure pump is required to fill the fuel in a short time.

[0003] The schematic diagram of the traditional centrifugal pump structure is as follows Figure 1 As shown, the wheel shaft, impeller and clamping nut are assembled and fixed on the pump body in sequence, but the wheel shaft length of this traditional centrifugal pump structure is short, and the wheel shaft, impeller and clamping nut are completely fixed after assembly, and the impeller position cannot be adjusted, and the pressure cannot be adjusted. When this traditional centrifugal pump structure is used in situations with variable requirements for hydraulic performance, a variety of specific impellers, pump bodies, motor assembly combinations or multiple models of centrifugal pumps are required to meet different hydraulic performance requirements. One model of traditional centrifugal pump cannot be used in situations with variable requirements for hydraulic performance. Summary of the invention

[0004] In view of the deficiencies in the above-mentioned background technology, the present invention proposes a multifunctional centrifugal pump structure, which solves the technical problems that the wheel axle length of the traditional centrifugal pump structure is short, the wheel axle is completely fixed with the impeller and the locking nut after assembly, the impeller position cannot be adjusted, and the pressure cannot be adjusted.

[0005] The technical solution of the present invention is implemented as follows: a multifunctional centrifugal pump structure includes a pump body, an impeller and a volute are arranged in the pump body, a stepless pressure regulating assembly for adjusting the relative position of the impeller and the volute is arranged in the pump body, a wheel axle on which the stepless pressure regulating assembly can be assembled is rotatably connected to the pump body, and the wheel axle is connected to the impeller.

[0006] Preferably, the adjustable numerical range of the relative position of the impeller and the volute cavity is 0.1 to 15 times the impeller outlet width.

[0007] Preferably, the length of the wheel shaft is more than 15 times the width of the impeller outlet.

[0008] Preferably, the stepless voltage regulating assembly comprises a first gasket group and a second gasket group, wherein the first gasket group is located at the head end of the impeller and is detachably connected to the wheel shaft, and the second gasket group is located between the tail end of the impeller and the pump body.

[0009] Preferably, a clamping component for detachably connecting the first gasket set to the wheel axle is provided at the head end of the wheel axle.

[0010] Preferably, the head end of the wheel axle is threadedly connected to the clamping component.

[0011] Preferably, the head end of the wheel shaft is provided with an internal thread hole, the clamping component is provided with an external thread, and the internal thread hole is adapted to the external thread of the clamping component.

[0012] Preferably, the first gasket group and the second gasket group have the same structure and both include at least one pressure-regulating gasket.

[0013] Preferably, the pressure regulating gasket is provided with a through hole, at least one pressure regulating gasket is coaxially arranged, and the through hole is clearance-matched with the outer diameter of the wheel axle.

[0014] Preferably, the pressure regulating gasket is provided with a slot hole, and the slot hole is connected to the through hole.

[0015] The multifunctional centrifugal pump structure designed in the present invention is based on the traditional centrifugal pump structure, adds a stepless pressure regulating component and uses an axle that can be equipped with the stepless pressure regulating component, that is, increases the length of the axle. By increasing the length of the axle, the stepless pressure regulating component is used to adjust the relative position relationship between the impeller and the outlet, thereby producing a centrifugal pump that can meet various hydraulic performance requirements. The multifunctional centrifugal pump structure of the present application avoids the situation where different hydraulic performance requirements require multiple specific impellers, pump bodies, motor assembly combinations or multiple models of centrifugal pumps; the multifunctional centrifugal pump structure of the present application is easy to operate, flexible in pressure regulation, and has a wide output pressure range, and can be used in situations where the hydraulic performance requirements vary. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying any creative work.

[0017] Figure 1 Schematic diagram of the traditional centrifugal pump structure.

[0018] Figure 2 It is a schematic diagram of the centrifugal pump structure of the present invention.

[0019] Figure 3 It is a schematic diagram of the pressure regulating gasket of the present invention.

[0020] Figure 4 It is a schematic diagram of the pressing component of the present invention.

[0021] In the figure: 1 pump body, 2 volute, 3 impeller, 4 wheel shaft, 5 clamping component, 6 internal threaded hole, 7 first gasket group, 8 second gasket group, 9 pressure regulating gasket, 10 through hole, 11 slotted hole, 12 flat key. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments 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 creative work are within the scope of protection of the present invention.

[0023] Embodiment 1, a multifunctional centrifugal pump structure, such as Figure 2 As shown, it includes a pump body 1, in which an impeller 3 and a volute 2 are arranged, and a stepless pressure regulating component for adjusting the relative position of the impeller 3 and the volute 2 is arranged in the pump body 1, and a wheel shaft 4 on which the stepless pressure regulating component can be assembled is rotatably connected in the pump body 1, and the wheel shaft 4 is connected to the impeller 3. The multifunctional centrifugal pump structure designed in the present invention is based on the traditional centrifugal pump structure, adds a stepless pressure regulating component and uses an axle 4 that can be equipped with the stepless pressure regulating component, that is, increases the length of the axle 4. By increasing the length of the axle 4, the stepless pressure regulating component is used to adjust the relative position relationship between the impeller 3 and the outlet of the impeller 3, thereby producing a centrifugal pump that can meet various hydraulic performance requirements. The multifunctional centrifugal pump structure of the present application avoids the situation where a variety of specific impellers 3, pump bodies 1, motor assembly combinations or multiple models of centrifugal pumps are required when different hydraulic performance requirements are met; the multifunctional centrifugal pump structure of the present application is easy to operate, flexible in pressure regulation, and has a wide pressure output range. It can be used in situations where the hydraulic performance requirements vary, and solves the technical problems of the traditional centrifugal pump structure with a short axle length, the axle and the impeller and the clamping nut being completely fixed after assembly, and the impeller position and the pressure cannot be adjusted.

[0024] Embodiment 2, based on embodiment 1, a multifunctional centrifugal pump structure, such as Figure 2 As shown, the adjustable numerical range of the relative position of the impeller 3 and the volute 2 is 0.1 to 15 times the outlet width of the impeller 3. The influence of the adjustable numerical range of the relative position of the impeller 3 and the volute 2 on the flow rate of the centrifugal pump was tested, and the experiments were conducted at 0.2 times, 1 times, 2 times, 3 times and 5 times the outlet width of the impeller 3. The specific experimental data are shown in the following table:

[0025]

[0026] In the traditional centrifugal pump structure, the adjustable numerical range of the relative position of the impeller 3 and the volute 2 is generally about 1 / 10 of the outlet width of the impeller 3, that is, 0.1 times the outlet width of the impeller 3, and the performance impact range is approximately within 3%. However, in the centrifugal pump structure of the present application, the adjustable numerical range of the relative position of the impeller 3 and the volute 2 is generally 0.1 to 15 times the outlet width of the impeller 3, and the performance impact range is basically 0 to 100%. When the adjustable numerical range of the relative position of the impeller 3 and the volute 2 is 2 times the outlet width of the impeller 3, the boosting performance of the centrifugal pump structure is most affected.

[0027] Embodiment 3, based on embodiment 2, a multifunctional centrifugal pump structure, such as Figure 2 As shown, the length of the axle 4 is more than 15 times the outlet width of the impeller 3. The length of the axle 4 is more than 15 times the outlet width of the impeller 3, so that the length of the axle 4 can be fully installed on the stepless pressure regulating assembly, avoiding the situation that the length of the axle 4 is not long enough to fully meet the position adjustment of the impeller and the pressure cannot be properly adjusted as needed. The axle 4 that is more than 15 times provides structural adjustment space for the stepless pressure regulating structure. The specific length of the axle 4 can be selected according to actual needs.

[0028] Embodiment 4, based on embodiment 3, a multifunctional centrifugal pump structure, such as Figure 2 As shown, the stepless pressure regulating assembly includes a first gasket group 7 and a second gasket group 8, wherein the first gasket group 7 is located at the head end of the impeller 3 and is detachably connected to the wheel shaft 4, and the second gasket group 8 is located between the tail end of the impeller 3 and the pump body 1. According to the pressure regulating requirements, the inlet diameter of the impeller 3, and the relationship between the assembly length of the impeller 3 and the wheel shaft 4, the first gasket group 7 and the second gasket group 8 and the size are set, and according to the outlet pressure requirements of the impeller 3, the first gasket group 7 and the second gasket group 8 of the impeller 3 and the volute 2 are increased or decreased, thereby adjusting the axial distance between the impeller 3 and the volute 2, and stepless pressure regulation can be achieved by adjusting the axial distance.

[0029] Embodiment 5, based on embodiment 4, a multifunctional centrifugal pump structure, such as Figure 2 As shown, the head end of the axle 4 is provided with a clamping component 5 for detachably connecting the first shim set 7 to the axle 4. The clamping component 5 is provided to achieve detachable connection between the first shim set 7 and the axle 4, thereby facilitating the size adjustment of the first shim set 7 on the axle 4.

[0030] Embodiment 6, based on embodiment 5, a multifunctional centrifugal pump structure, such as Figure 2 and Figure 4 As shown, the head end of the axle 4 is threadedly connected to the clamping member 5. The clamping member 5 is connected to the head end of the axle 4 by threading, which can be disassembled on the one hand and can firmly connect the first gasket set 7 to the axle 4 on the other hand.

[0031] Embodiment 7, based on embodiment 6, a multifunctional centrifugal pump structure, such as Figure 1 , Figure 2 and Figure 4 As shown, the head end of the wheel shaft 4 is provided with an internal thread hole 6, and the pressing component 5 is provided with an external thread, and the internal thread hole 6 is adapted to the external thread of the pressing component 5. The pressing component 5 is provided with an external thread, and the first gasket set 7 is connected to the wheel shaft 4 by threading the internal thread hole 6 with the external thread of the pressing component 5. The head end of the wheel shaft 4 is changed from the traditional external thread to the internal thread hole 6, so that the matching pressing component 5 becomes an external thread, which reduces the interception effect of the axial flow of the medium, which is beneficial to the centrifugal pump to transport liquid.

[0032] Embodiment 8, based on any one of Embodiments 4 to 7, a multifunctional centrifugal pump structure, such as Figure 2 and Figure 3 As shown, the first gasket group 7 and the second gasket group 8 have the same structure and both include at least one pressure-regulating gasket 9. The same structure of the first gasket group 7 and the second gasket group 8 is conducive to simplifying the components of the multifunctional centrifugal pump structure of the present application. The first gasket group 7 and the second gasket group 8 both include at least one pressure-regulating gasket 9, that is, the first gasket group 7 and the second gasket group 8 are both formed by a combination of a plurality of pressure-regulating gaskets 9, and the size of the first gasket group 7 and the second gasket group 8 can be adjusted by increasing or decreasing the number of pressure-regulating gaskets 9, thereby adjusting the axial distance between the impeller 3 and the volute 2, and stepless pressure regulation can be achieved by adjusting the axial distance.

[0033] Embodiment 9, based on embodiment 8, a multifunctional centrifugal pump structure, such as Figure 3 As shown, the pressure regulating gasket 9 is provided with a through hole 10, at least one pressure regulating gasket 9 is coaxially arranged, and the through hole 10 is clearance-matched with the outer diameter of the axle 4. The through hole 10 is provided on the one hand to sleeve the pressure regulating gasket 9 on the axle 4, and on the other hand to facilitate forming a plurality of pressure regulating gaskets 9 into a first gasket group 7 or a second gasket group 8.

[0034] Embodiment 10, based on embodiment 9, a multifunctional centrifugal pump structure, such as Figure 3 As shown, the pressure regulating gasket 9 is provided with a slotted hole 11, which is connected to the through hole 10. The slotted hole 11 is provided to facilitate passing the pressure regulating gasket 9 through the axle 4 installed with the flat key 12, wherein the flat key 12 is provided on the axle 4 to complete the synchronous rotation connection between the axle 4 and the impeller 3. Preferably, two slotted holes 11 are provided on the pressure regulating gasket 9, and the two slotted holes 11 are symmetrically arranged on the pressure regulating gasket 9, and the two symmetrically arranged slotted holes 11 are more conducive to passing the pressure regulating gasket 9 through the axle 4 installed with the flat key 12.

[0035] When implementing Example 10, the impeller 3 is connected to the wheel shaft 4 through the flat key 12, and then the sizes of the first gasket group 7 and the second gasket group 8 of the impeller 3 and the volute 2 are determined according to the outlet pressure requirement of the impeller 3, that is, it is determined that the first gasket group 7 and the second gasket group 8 are respectively composed of several pressure-regulating gaskets 9, and then the first gasket group 7 with a determined size is fixed on the wheel shaft 4 through the clamping component 5 and is located at the head end of the impeller 3, and the second gasket group 8 is sleeved on the wheel shaft 4 and is located at the tail end of the impeller 3, and the second gasket group 8 is abutted between the tail end of the impeller 3 and the pump body 1, and the assembly of the multifunctional centrifugal pump structure of the present application can be completed.

[0036] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A multifunctional centrifugal pump structure, comprising a pump body (1), wherein an impeller (3) and a volute (2) are arranged in the pump body (1), characterized in that: The pump body (1) is provided with a stepless pressure regulating assembly for adjusting the relative position of the impeller (3) and the volute (2); a wheel shaft (4) on which the stepless pressure regulating assembly can be mounted is rotatably connected to the pump body (1); the wheel shaft (4) is connected to the impeller (3).

2. The multifunctional centrifugal pump structure according to claim 1, characterized in that: The relative position of the impeller (3) and the volute (2) can be adjusted within a numerical range of 0.1 to 15 times the outlet width of the impeller (3).

3. The multifunctional centrifugal pump structure according to claim 2 is characterized in that: The length of the wheel shaft (4) is more than 15 times the width of the outlet of the impeller (3).

4. The multifunctional centrifugal pump structure according to claim 3 is characterized in that: The stepless voltage regulating assembly comprises a first gasket group (7) and a second gasket group (8), wherein the first gasket group (7) is located at the head end of the impeller (3) and is detachably connected to the wheel shaft (4), and the second gasket group (8) is located between the tail end of the impeller (3) and the pump body (1).

5. The multifunctional centrifugal pump structure according to claim 4, characterized in that: The front end of the wheel axle (4) is provided with a clamping component (5) for detachably connecting the first gasket set (7) to the wheel axle (4).

6. The multifunctional centrifugal pump structure according to claim 5, characterized in that: The head end of the wheel shaft (4) is threadedly connected to the pressing component (5).

7. The multifunctional centrifugal pump structure according to claim 6, characterized in that: The head end of the wheel shaft (4) is provided with an internal thread hole (6), the pressing component (5) is provided with an external thread, and the internal thread hole (6) is adapted to the external thread of the pressing component (5).

8. The multifunctional centrifugal pump structure according to any one of claims 4 to 7, characterized in that: The first gasket group (7) and the second gasket group (8) have the same structure and both comprise at least one pressure regulating gasket (9).

9. The multifunctional centrifugal pump structure according to claim 8, characterized in that: The pressure regulating gasket (9) is provided with a through hole (10), at least one pressure regulating gasket (9) is coaxially arranged, and the through hole (10) is clearance-matched with the outer diameter of the wheel axle (4).

10. The multifunctional centrifugal pump structure according to claim 9, characterized in that: The pressure regulating gasket (9) is provided with a slot hole (11), and the slot hole (11) is connected to the through hole (10).

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