Pump device with replaceable inlet runner component

Abstract

The utility model discloses a pump device with a replaceable inlet flow channel part. The pump device comprises a shell assembly, a hydraulic assembly, a bearing assembly and a power assembly, wherein the hydraulic assembly, the bearing assembly and the power assembly are arranged on the shell assembly and connected in sequence. The hydraulic assembly, the bearing assembly and the power assembly are coaxially connected; the shell assembly comprises a pump shell, a cavity is formed in the pump shell, a fluid inlet is formed in one end of the pump shell, and a second boss coaxial with the fluid inlet is arranged on the inner wall, at the fluid inlet, of the pump shell; the hydraulic assembly is arranged in a cavity of the pump shell and comprises a flow channel component, the flow channel component is of a hollow cylindrical structure, and a first boss is arranged on the outer wall of the flow channel component; the flow channel component can sequentially penetrate through the fluid inlet and the second boss to be inserted into the cavity in the pump shell till the first boss makes contact with the second boss and is fixedly connected with the second boss. According to the pump device, the cost and the test time of a model pump test are saved, and the development efficiency of a reactor coolant pump is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of water pumps, in particular to a pump device with a replaceable inlet flow channel component. Background Art

[0002] The hydraulic performance of reactor coolant pump units is usually obtained through scaled-down model pump tests. During the development of reactor coolant pump units, customers have increasingly placed additional requirements on the structure and dimensions of the pump casing. For example, the inlet flow channel structure and dimensions of the pump casing specified by the customer in the CAP1000 Bailong reactor coolant pump project are significantly different from KSB's original design. In the existing model pump hydraulic performance test process, it is usually necessary to manufacture multiple sets of pump casings with different flow channel structures based on the original pump casing. By replacing the pump casings with different flow channel structures, the hydraulic performance of the corresponding pump unit can be tested. Since the existing hydraulic performance test process requires the manufacture of different pump casings according to project needs, the pump unit is not economical and convenient. A pump unit is needed that can arbitrarily change the internal flow channel structure of the pump casing. Utility Model Content

[0003] The purpose of the utility model is to provide a pump device with a replaceable inlet flow channel component, which avoids changing the hydraulic performance of the pump device by replacing different pump casings, saves experimental costs and experimental time, and improves the efficiency of reactor coolant pump development.

[0004] In order to achieve the above-mentioned object, the utility model provides a pump device with a replaceable inlet flow channel component, comprising: a housing assembly, and a hydraulic assembly, a bearing assembly, and a power assembly arranged on the housing assembly; one end of the bearing assembly is connected to the hydraulic assembly, and the other end is connected to the power assembly; the hydraulic assembly, the bearing assembly, and the power assembly are coaxially connected;

[0005] The housing assembly comprises: a pump housing, wherein a cavity is provided inside the pump housing and a fluid inlet is provided at one end thereof, and a second boss coaxial with the fluid inlet is provided on the inner wall of the pump housing at the fluid inlet;

[0006] The hydraulic component is arranged in the cavity inside the pump casing, and includes: a flow channel component, which is a hollow cylindrical structure and a first boss is provided on its outer wall; the flow channel component can be inserted into the cavity in the pump casing through the fluid inlet and the second boss in sequence until the first boss contacts and is connected and fixed with the second boss.

[0007] Optionally, the inner diameter of the second boss is larger than the outer diameter of the flow channel component and smaller than the outer diameter of the first boss.

[0008] Optionally, a plurality of evenly distributed first fixing holes are provided on the surface of the first boss of the flow channel component, and a plurality of evenly distributed second fixing holes are provided on the second boss of the pump housing, and the number of the first fixing holes is the same as the number of the second fixing holes. The flow channel component and the pump housing can be connected together by passing a fixing member through the first fixing hole and the second fixing hole, so that the flow channel component is fixed on the axis of the fluid inlet.

[0009] Optionally, the hydraulic component further includes:

[0010] an impeller disposed in the cavity of the pump casing and coaxially positioned with the fluid inlet;

[0011] The guide vane is arranged in the cavity of the pump casing, located between the impeller and the inner wall of the pump casing, and is coaxially placed with the impeller.

[0012] Optionally, the length of the flow channel component matches the distance between the fluid inlet of the pump housing and a side of the impeller close to the fluid inlet.

[0013] Optionally, the bearing assembly comprises:

[0014] a bearing body, which is coaxially arranged with the impeller and the guide vane, and one end of which is connected to the impeller;

[0015] The torque meter is fixed to the housing assembly and is placed coaxially with the impeller;

[0016] A first coupling and a second coupling, wherein one end of the first coupling is coaxially connected to one end of the torque meter and the other end is coaxially connected to the bearing body; one end of the second coupling is coaxially connected to the other end of the torque meter.

[0017] Optionally, the power assembly includes a motor, which is fixed to the housing assembly and has an output end coaxially connected to the second coupling.

[0018] Optionally, the housing assembly further includes a base, and the pump housing, torque meter, and motor are coaxially fixed on the base.

[0019] Compared with the prior art, the technical solution of the present utility model has at least the following beneficial effects:

[0020] The pump casing and flow channel components in the pump device of the present invention are detachable and can be designed in accordance with the requirements of the hydraulic performance test of the model pump. By combining different flow channel components and pump casings, the hydraulic performance parameters of the pump device can be changed to complete the hydraulic performance test of the pump, thereby effectively avoiding repeated processing and manufacturing of the complete pump casing (i.e., the integrated structure of the pump casing and the flow channel components), saving experimental costs and time, and improving the efficiency of reactor coolant pump development. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1This is a schematic diagram of a pump device with a replaceable inlet flow channel component according to the present invention.

[0022] Figure 2 This is a schematic diagram of the housing assembly of the pump device with a replaceable inlet flow channel component of the present invention.

[0023] Figure 3 This is a schematic diagram of the flow channel component of the pump device with a replaceable inlet flow channel component of the present invention.

[0024] In the figure, 1-pump casing, 11-second boss, 12-fluid inlet, 13-fluid outlet, 21-impeller, 22-flow channel component, 23-first boss, 3-bearing body, 41-first coupling, 42-second coupling, 5-torque meter, 6-motor, 7-base. DETAILED DESCRIPTION

[0025] The following is a clear and complete description of the technical solution of the present invention in conjunction with the accompanying drawings. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0026] In the description of this utility model, it should be noted that the terms "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0027] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to mechanical connections; they may refer to direct connections, indirect connections through an intermediate medium, or internal communication between two components. Those skilled in the art will understand the specific meanings of these terms in this utility model based on the specific circumstances.

[0028] like Figure 1As shown, the utility model provides a pump device with a replaceable inlet flow channel component, a shell assembly, a hydraulic assembly, a bearing assembly, and a power assembly. The shell assembly is used to change the hydraulic performance of the pump device, and is provided with a bearing assembly and a power assembly; the hydraulic assembly is arranged inside the shell assembly; one end of the bearing assembly is connected to the hydraulic assembly, and the other end is connected to the power assembly; the hydraulic assembly, bearing assembly, and power assembly are coaxially connected.

[0029] The housing assembly includes: a base 7 and a pump housing 1. The base 7 is placed on the experimental platform, and the pump housing 1, the bearing assembly, and the power assembly are fixed on the surface axis in sequence to ensure that the pump housing 1, the bearing assembly, and the power assembly are on the same axis. Figure 2 As shown, the interior of the pump casing 1 is provided with a cavity for installing a hydraulic component, thereby protecting the hydraulic component; a bearing assembly is provided on one side of the pump casing 1, and a fluid inlet 12 is provided on the surface of the other side thereof, allowing the fluid to flow into the cavity of the pump casing 1; a fluid outlet 13 is provided on the shell surface of the pump casing 1, allowing the fluid entering the cavity of the pump casing 1 to flow out.

[0030] The hydraulic assembly includes a flow channel component 22, an impeller 21, and guide vanes. The impeller 21 is disposed within the cavity of the pump casing 1 and coaxially with the fluid inlet 12, providing kinetic energy to the fluid within the cavity of the pump casing 1. The guide vanes are disposed within the cavity of the pump casing 1, located between the impeller 21 and the inner wall of the pump casing 1 and coaxially with the impeller 21. They reduce the flow velocity of the fluid after passing through the impeller 21, converting the fluid's kinetic energy into pressure energy. The flow channel component 22 is a hollow cylindrical structure. The inner wall shape of the flow channel component 22 can be designed according to project requirements, thereby changing the hydraulic performance parameters of the pump device (including: head, efficiency); the outer diameter of the flow channel component 22 is smaller than the inner diameter of the fluid inlet 12, and can be inserted into the internal cavity of the pump casing 1 through the fluid inlet 12; the length of the flow channel component 22 matches the distance between the fluid inlet 12 of the pump casing 1 and the side of the impeller 21 close to the fluid inlet 12, so that the fluid enters the flow channel component 22 through the fluid inlet 12 and directly reaches the impeller 21, thereby guiding the fluid.

[0031] Specifically, such as Figure 3 As shown, a first boss 23 is provided on the outer wall of the flow channel component 22. The first boss 23 is annular and its inner diameter matches the outer diameter of the flow channel component 22. A plurality of first fixing holes are evenly distributed on the surface of the first boss 23. Figure 1As shown, the inner wall of the fluid inlet 12 of the pump housing 1 is provided with a second boss 11 coaxial with the fluid inlet 12. The second boss 11 is annular, and the inner diameter of the second boss 11 is larger than the outer diameter of the flow channel component 22 and smaller than the outer diameter of the first boss 23. The surface of the second boss 11 is provided with a number of evenly distributed second fixing holes, and the number of the second fixing holes is the same as the number of the first fixing holes. One end of the flow channel component 22 is inserted into the cavity of the pump housing 1 through the fluid inlet 12 and the second boss 11 in sequence until the first boss 23 of the flow channel component 22 contacts the second boss 11 on the inner wall of the pump housing 1. At the same time, the first fixing hole is aligned with the second fixing hole, and the flow channel component 22 and the pump housing 1 are connected together by fixings to ensure that the flow channel component 22 is fixed on the axis of the fluid inlet 12.

[0032] Specifically, the fluid enters the flow channel component 22 through the fluid inlet 12 and flows into the impeller 21 along the inner wall of the flow channel component 22; the impeller 21 provides kinetic energy to the fluid through the circumferential rotation, and the fluid that obtains kinetic energy passes through the guide vanes, converting the kinetic energy of the fluid into pressure energy and flowing out through the fluid outlet 13.

[0033] The bearing assembly includes a bearing body 3, two couplings, and a torque meter 5. The bearing body 3 is coaxially positioned with the impeller 21 and guide vanes, with one end connected to the impeller 21, capable of transmitting torque to the impeller 21 and causing it to rotate. The torque meter 5 is fixed to the base 7 and coaxially positioned with the impeller 21, capable of measuring torque. The two couplings are a first coupling 41 and a second coupling 42. One end of the first coupling 41 is coaxially connected to one end of the torque meter 5, and the other end is coaxially connected to the bearing body 3. One end of the second coupling 42 is coaxially connected to the other end of the torque meter 5.

[0034] The power assembly includes a motor 6, which is fixed to a base 7 and has its output end coaxially connected to a second coupling 42. Thus, the motor 6 is coaxially positioned with the impeller 21, the bearing body 3, the two couplings, and the torque meter 5, providing torque to the impeller 21. During operation, the motor 6 sequentially transmits torque through the second coupling 42, the torque meter 5, the first coupling 41, and the bearing body 3, driving the impeller 21 in circumferential rotation and performing work on the fluid passing through the impeller 21, providing power to the fluid.

[0035] During the pumping capacity test of the pump device, the pump housing 1, torque meter 5, and motor 6 are coaxially fixed to the base 7. The pump housing 1's fluid inlet 12, impeller 21, guide vanes, bearing body 3, two couplings, torque meter 5, and motor 6 are coaxially connected. Simultaneously, multiple sets of flow channel components 22 with varying inner wall shapes are prepared and numbered according to test requirements.

[0036] According to the number of the flow channel component 22, the flow channel component 22 is inserted into the cavity of the pump housing 1 through the fluid inlet 12 and the second boss 11 in sequence, until the first boss 23 on the outer wall of the flow channel component 22 contacts the second boss 11 on the inner wall of the pump housing 1, and the first fixing hole of the first boss 23 is aligned with the second fixing hole on the second boss 11. The flow channel component 22 and the pump housing 1 are fixed together by passing the fixing piece through the first fixing hole and the second fixing hole in sequence. The installed pump device is connected in series to an experimental circuit including a pressure meter, a flow meter, and a regulating valve, so that the inlet pipe of the experimental circuit is connected to the flow inlet of the pump housing 1, and the outlet pipe of the experimental circuit is connected to the flow outlet of the pump housing 1. The pressure value, flow value, and torque of the motor 6 in the experimental circuit are collected through the pressure meter, flow meter, and torque meter 5, and the hydraulic performance of the pump device under the action of the flow channel component 22 is evaluated.

[0037] After completing the test of the flow channel component 22, the inlet pipe and the outlet pipe of the experimental circuit are removed from the fluid inlet 12 and the fluid outlet 13 of the pump housing 1 respectively; at the same time, the fixing parts are removed to separate the flow channel component 22 from the pump housing 1. According to the numbering of the multiple groups of flow channel components 22, the next group of flow channel components 22 is installed at the fluid inlet 12 of the pump housing 1, and the hydraulic performance of the pump device is tested. In the process of changing the flow channel component 22 of the pump device to test the hydraulic performance of the pump device, the flow channel in the internal cavity of the pump housing 1 is changed by replacing the flow channel component 22 fixed on the pump housing 1, without having to replace the entire pump housing due to the change of the flow channel structure in the pump housing, making the hydraulic performance test of the pump device more economical and convenient.

[0038] To sum up, the pump casing and flow channel components in the pump device of the present invention are detachably installed. By combining different flow channel components and pump casings, the hydraulic performance parameters of the pump device can be changed, and the hydraulic performance experiment of the pump can be completed. This avoids changing the hydraulic performance of the pump device by replacing different pump casings, saves experimental costs and time, and improves the efficiency of reactor coolant pump development.

[0039] Although the present invention has been described in detail through the above preferred embodiments, it should be understood that the above description should not be considered as limiting the present invention. After reading the above description, various modifications and alternatives to the present invention will be readily apparent to those skilled in the art. Therefore, the scope of protection of the present invention shall be defined by the appended claims.

Claims

1. A pump device with a replaceable inlet flow channel component, characterized in that: It includes: a shell assembly, and a hydraulic assembly, a bearing assembly, and a power assembly arranged on the shell assembly; One end of the bearing assembly is connected to the hydraulic assembly, and the other end is connected to the power assembly; the hydraulic assembly, the bearing assembly, and the power assembly are coaxially connected; The housing assembly comprises: a pump housing, wherein a cavity is provided inside the pump housing and a fluid inlet is provided at one end thereof, and a second boss coaxial with the fluid inlet is provided on the inner wall of the pump housing at the fluid inlet; The hydraulic component is arranged in the cavity inside the pump casing, and includes: a flow channel component, which is a hollow cylindrical structure and a first boss is provided on its outer wall; the flow channel component can be inserted into the cavity in the pump casing through the fluid inlet and the second boss in sequence until the first boss contacts and is connected and fixed with the second boss.

2. The pump device with a replaceable inlet flow channel component according to claim 1, characterized in that: The inner diameter of the second boss is larger than the outer diameter of the flow channel component and smaller than the outer diameter of the first boss.

3. The pump device with a replaceable inlet flow channel component according to claim 1, characterized in that: The first boss surface of the flow channel component is provided with a plurality of evenly distributed first fixing holes, and the second boss of the pump housing is provided with a plurality of evenly distributed second fixing holes, and the number of the first fixing holes is the same as the number of the second fixing holes. The flow channel component and the pump housing can be connected together by passing the fixing parts through the first fixing holes and the second fixing holes, so that the flow channel component is fixed on the axis of the fluid inlet.

4. The pump device with a replaceable inlet flow channel component according to claim 1, characterized in that: The hydraulic assembly further comprises: an impeller disposed in the cavity of the pump casing and coaxially positioned with the fluid inlet; The guide vane is arranged in the cavity of the pump casing, located between the impeller and the inner wall of the pump casing, and is coaxially placed with the impeller.

5. The pump device with a replaceable inlet flow channel component according to claim 4, characterized in that: The length of the flow channel component matches the distance between the fluid inlet of the pump housing and the side of the impeller close to the fluid inlet.

6. The pump device with a replaceable inlet flow channel component according to claim 4, characterized in that: The bearing assembly comprises: a bearing body, which is coaxially arranged with the impeller and the guide vane, and one end of which is connected to the impeller; The torque meter is fixed to the housing assembly and is placed coaxially with the impeller; A first coupling and a second coupling, wherein one end of the first coupling is coaxially connected to one end of the torque meter and the other end is coaxially connected to the bearing body; one end of the second coupling is coaxially connected to the other end of the torque meter.

7. The pump device with a replaceable inlet flow channel component according to claim 6, characterized in that: The power assembly includes a motor, which is fixed on the housing assembly and has an output end coaxially connected to the second coupling.

8. The pump device with a replaceable inlet flow channel component according to claim 7, characterized in that: The housing assembly further comprises a base, on which the pump housing, torque meter and motor are coaxially fixed.

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