Pump device with replaceable inlet runner component and using method thereof

Abstract

The invention discloses a pump device with a replaceable inlet runner component and a using method of the pump device. 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 are sequentially connected; 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 test cost and test time of the model pump are saved, and the development efficiency of the reactor coolant pump is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of water pumps, and in particular to a pump device with a replaceable inlet flow channel component and a use method thereof. Background Art

[0002] The hydraulic performance of a reactor coolant pump unit is usually obtained through a scaled-down model pump test. During the development of the reactor coolant pump unit, customers have put forward more and more additional requirements for the structure and size of the pump casing. For example, the inlet flow channel structure and size of the pump casing specified by the customer in the CAP1000 Bailong reactor coolant pump project are significantly different from the original design of KSB. In the existing model pump hydraulic performance test process, it is usually necessary to manufacture multiple groups of pump casings with different flow channel structures on the basis of the original pump casing, and then test the hydraulic performance of the corresponding pump unit by replacing the pump casings with different flow channel structures. Since different pump casings need to be manufactured according to project needs in the existing hydraulic performance test process, the pump device is not economical and convenient, and a pump device that can arbitrarily change the internal flow channel structure of the pump casing is needed. Summary of the invention

[0003] The purpose of the present invention is to provide a pump device with a replaceable inlet flow channel component and a method of using the same, so as to avoid changing the hydraulic performance of the pump device by replacing different pump casings, save experimental costs and experimental time, and improve the efficiency of reactor coolant pump development.

[0004] In order to achieve the above-mentioned object, the present invention 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 fixings 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.

[0009] Optionally, the hydraulic component further comprises:

[0010] An impeller is disposed in the cavity of the pump housing and is coaxially placed 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 placed with the impeller and the guide vane, and one end of which is connected to the impeller;

[0015] The torque meter is fixed on the housing assembly and is coaxially placed 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] In addition, the present invention also provides a method for using a pump device with a replaceable inlet flow channel component, specifically comprising: coaxially fixing a pump housing, a torque meter, and a motor on a base, and coaxially connecting a fluid inlet of the pump housing, an impeller, a guide vane, a bearing body, a first coupling, a second coupling, a torque meter, and a motor;

[0020] Prepare multiple groups of flow channel components with different inner wall shapes according to the test requirements and label them; insert the flow channel components into the cavity of the pump housing through the fluid inlet and the second boss in sequence according to the flow channel component numbers, until the first boss on the outer wall of the flow channel component contacts the second boss on the inner wall of the pump housing, and align the first fixing hole of the first boss with the second fixing hole on the second boss, and pass the fixing piece through the first fixing hole and the second fixing hole in sequence to fix the flow channel component and the pump housing together;

[0021] The installed pump device is connected in series in an experimental loop including a pressure meter, a flow meter, and a regulating valve, so that the inlet pipe of the experimental loop is connected to the flow inlet of the pump housing, and the outlet pipe of the experimental loop is connected to the flow outlet of the pump housing.

[0022] Optionally, after completing the test of a group of flow path components, the inlet pipe and the outlet pipe of the experimental loop are respectively removed from the fluid inlet and the fluid outlet of the pump casing; the fixings are removed to separate the flow path components from the pump casing; according to the numbering of the multiple groups of flow path components, the next group of flow path components is installed at the fluid inlet of the pump casing, and the hydraulic performance of the pump device is tested.

[0023] Compared with the prior art, the technical solution of the present invention has at least the following beneficial effects:

[0024] The pump casing and flow channel components in the pump device described in the present invention are detachably installed, and different flow channel components can be designed according to 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, 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

[0025] Figure 1 It is a schematic diagram of a pump device with a replaceable inlet flow channel component of the present invention.

[0026] Figure 2 It is a schematic diagram of the housing assembly of the pump device with the replaceable inlet flow channel component of the present invention.

[0027] Figure 3 It is a schematic diagram of the flow channel component of the pump device with a replaceable inlet flow channel component of the present invention.

[0028] 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

[0029] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. 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.

[0030] In the description of the present invention, it should be noted that the terms "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.

[0031] In the description of the present invention, it should be noted that, 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; 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.

[0032] like Figure 1 As shown, the present invention 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, the bearing assembly, and the power assembly are coaxially connected.

[0033] 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 pump casing 1 is provided with a cavity inside for installing a hydraulic component, so as to protect 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, so that the fluid can flow into the cavity of the pump casing 1; a fluid outlet 13 is provided on the shell surface of the pump casing 1, so that the fluid entering the cavity of the pump casing 1 can flow out.

[0034] The hydraulic assembly includes: a flow channel component 22, an impeller 21, and a guide vane. The impeller 21 is arranged in the cavity of the pump housing 1 and is coaxially placed with the fluid inlet 12, and can provide kinetic energy to the fluid in the cavity of the pump housing 1. The guide vane is arranged in the cavity of the pump housing 1 and is located between the impeller 21 and the inner wall of the pump housing 1, and is coaxially placed with the impeller 21, and can reduce the flow rate of the fluid after passing through the impeller 21, and convert the kinetic energy of the fluid into pressure energy. The flow channel component 22 is a hollow cylindrical structure, and 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.

[0035] Specifically, 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 evenly distributed first fixing holes are provided on the surface of the first boss 23. Figure 1 As 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, and 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 a fixing member to ensure that the flow channel component 22 is fixed on the axis of the fluid inlet 12.

[0036] 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 rotates circumferentially to provide kinetic energy to the fluid, and the fluid that obtains the kinetic energy passes through the guide vanes, converting the kinetic energy of the fluid into pressure energy and flows out through the fluid outlet 13.

[0037] The bearing assembly includes: a bearing body 3, two couplings, and a torque meter 5. The bearing body 3 is coaxially placed with the impeller 21 and the guide vane, and one end of the bearing body 3 is connected to the impeller 21, and can transmit torque to the impeller 21 to rotate the impeller 21. The torque meter 5 is fixed on the base 7 and coaxially placed with the impeller 21, and can measure torque. The two couplings are respectively a first coupling 41 and a second coupling 42, wherein 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.

[0038] The power assembly includes a motor 6, which is fixed on a base 7, and its output end is coaxially connected to a second coupling 42; therefore, the motor 6 is coaxially placed with the impeller 21, the bearing body 3, two couplings, and the torque meter 5 to provide torque for the impeller 21. When the motor 6 is working, the second coupling 42, the torque meter 5, the first coupling 41, and the bearing body 3 sequentially transmit torque, and drive the impeller 21 to rotate circumferentially, and at the same time, work is performed on the fluid passing through the impeller 21 to provide power for the fluid.

[0039] During the water pumping capacity test of the pump device, the pump housing 1, the torque meter 5, and the motor 6 are coaxially fixed on the base 7, and the fluid inlet 12 of the pump housing 1, the impeller 21, the guide vane, the bearing body 3, the two couplings, the torque meter 5, and the motor 6 are coaxially connected. At the same time, multiple groups of flow channel components 22 with different inner wall shapes are prepared according to the test requirements and numbered.

[0040] 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, and 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 pump device that has been installed is connected in series in 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, the flow meter, and the torque meter 5, and then the hydraulic performance of the pump device under the action of the flow channel component 22 is evaluated.

[0041] After completing the test of the flow channel component 22, the inlet pipe and the outlet pipe of the experimental loop 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.

[0042] To sum up, the pump casing and flow channel components in the pump device described in 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, saving experimental costs and experimental time, and improving the efficiency of reactor coolant pump development.

[0043] Although the content of the present invention has been described in detail through the above preferred embodiments, it should be appreciated that the above description should not be considered as a limitation of the present invention. After reading the above content, it will be apparent to those skilled in the art that various modifications and substitutions of the present invention will occur. Therefore, the protection scope of the present invention should be limited 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 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 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 first fixing holes and the second fixing holes through the fixing parts, so that the flow channel component is fixed on the axis of the fluid inlet.

4. The pump device with replaceable inlet flow channel component according to claim 1, characterized in that: The hydraulic assembly also includes: An impeller is disposed in the cavity of the pump housing and is coaxially placed 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 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 replaceable inlet flow channel component according to claim 4, characterized in that: The bearing assembly comprises: A bearing body, which is coaxially placed with the impeller and the guide vane, and one end of which is connected to the impeller; The torque meter is fixed on the housing assembly and is coaxially placed 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 replaceable inlet flow channel component according to claim 6, characterized in that: The power assembly comprises 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 replaceable inlet flow channel component according to claim 7, characterized in that: The housing assembly further comprises a base, on which the pump housing, the torque meter and the motor are coaxially fixed.

9. A method for using a pump device having a replaceable inlet flow channel component according to any one of claims 1 to 8, characterized in that: Fix the pump housing, torque meter and motor coaxially on the base, and connect the fluid inlet of the pump housing, impeller, guide vane, bearing body, first coupling, second coupling, torque meter and motor coaxially; Prepare multiple groups of flow channel components with different inner wall shapes according to the test requirements and label them; insert the flow channel components into the cavity of the pump housing through the fluid inlet and the second boss in sequence according to the flow channel component numbers, until the first boss on the outer wall of the flow channel component contacts the second boss on the inner wall of the pump housing, and align the first fixing hole of the first boss with the second fixing hole on the second boss, and pass the fixing piece through the first fixing hole and the second fixing hole in sequence to fix the flow channel component and the pump housing together; The installed pump device is connected in series in an experimental loop including a pressure meter, a flow meter, and a regulating valve, so that the inlet pipe of the experimental loop is connected to the flow inlet of the pump housing, and the outlet pipe of the experimental loop is connected to the flow outlet of the pump housing.

10. The method for using the pump device with replaceable inlet flow channel component according to claim 9, characterized in that: After completing the test of a group of flow path components, the inlet pipe and the outlet pipe of the experimental loop are removed from the fluid inlet and the fluid outlet of the pump housing respectively; the fixing parts are removed to separate the flow path components from the pump housing; according to the numbering of the multiple groups of flow path components, the next group of flow path components is installed at the fluid inlet of the pump housing, and the hydraulic performance of the pump device is tested.

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