Canned pump shaft internal circulation type circulation quantity testing device
By designing a test device including base, pump body, bracket, rear bearing chamber test tooling, throttle hole, test pipeline and turbine flowmeter, the problem of difficult to measure the circulating fluid flow in the shielded pump shaft is solved, and accurate Circulating fluid flow measurement reduces the risk of pump damage.
Patent Information
- Application Number
- CN202420553281.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-21
- Publication Date
- 2024-12-17
- Estimated Expiration
- 2034-03-21
AI Technical Summary
The prior art is difficult to accurately measure the circulating fluid flow in the shielded pump shaft, resulting in an increased risk of pump damage.
Design a test device including a base, pump body, bracket, rear bearing chamber test tooling, throttle hole, test pipeline and turbine flowmeter. By replacing the rear axle head bolt and rear bearing chamber, a circulation loop is formed and an impeller is used to generate Centrifugal force realizes circulating flow of the medium and measures the circulating fluid flow through a turbine flowmeter.
The accurate measurement of the flow of circulating fluid in the shielded pump shaft is achieved, and the risk of pump damage caused by insufficient circulating fluid is solved. The structure is simple and only the rear axle head bolt and rear bearing chamber need to be replaced.
Smart Images
Figure CN222185131U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of canned pump circulation quantity measurement, in particular to a canned pump shaft inner circulation type circulation quantity testing device. Background Art
[0002] As a centrifugal pump used to transport flammable, explosive, volatile, corrosive and highly toxic liquids, the canned motor pump is widely used in important fields such as petrochemical industry, aerospace, national defense industry and environmental protection.
[0003] The canned motor pump needs to use its own conveying medium to lubricate the bearings and cool the motor. If the circulating fluid is insufficient, it may cause damage to the pump. Therefore, it is very important to ensure the flow of circulating fluid for the normal operation of the pump. Figure 2 When the canned pump is working, the circulating fluid flows back to the impeller inlet through the central hole of the shaft, so the circulating fluid flow cannot be measured by conventional means. Therefore, a canned pump shaft internal circulation type circulation volume test device is proposed. Utility Model Content
[0004] The utility model aims to provide a canned pump shaft internal circulation type circulation quantity testing device to solve the problems raised in the above background technology.
[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a shielded pump shaft internal circulation type circulation volume testing device, comprising a base and a pump body, the surface of the base is fixedly connected to a bracket, the top of the bracket is fixedly connected to the pump body, the rear bearing chamber of the pump body is replaced by a rear bearing chamber test tooling, a throttling hole is opened on the surface of the rear bearing chamber test tooling, and a test pipeline is fixedly connected between the throttling hole and the output end of the pump body, specifically, the test pipeline is led from the rear bearing chamber test tooling to the pump body inlet flange, and a turbine flowmeter is fixedly connected to the surface of the test pipeline.
[0006] As a preferred solution, the front bearing chamber and the rear bearing chamber in the pump body are both provided with shaft sleeves, and rotating bearings are installed on the surface of the shaft sleeves. The pump body, the rear bearing chamber and the stator assembly are fixedly connected by connecting bolts to form a sealed whole.
[0007] As a preferred solution, the pump body is provided with a stator assembly and a rotor assembly in sequence from the outside to the inside.
[0008] As a preferred solution, the inner side wall of the stator assembly is fixedly connected to a rotating shaft via a shaft head bolt, and both ends of the rotating shaft are overfitted with the rotating bearings in the front bearing chamber and the rear bearing chamber respectively.
[0009] As a preferred solution, a shaft center hole is provided inside the rotating shaft, and the shaft center hole is the same size as the throttling hole.
[0010] As a preferred solution, one end of the rotating shaft is fixedly connected to an impeller, and a thrust plate is key-connected inside the rotor assembly.
[0011] Technical effects and advantages of the utility model:
[0012] When conducting a circulation volume test experiment, replace the rear shaft head bolt, cancel the center hole of the rear shaft head bolt, replace the rear bearing chamber with a rear bearing chamber test fixture, and lead the test pipeline from the rear bearing chamber test fixture to the pump body inlet flange to form a circulation loop. Start the pump and the impeller rotates through the support of the rotating bearing and the rotating shaft. The impeller generates centrifugal force through rotation, so that the medium is sucked into the pump body. Under the action of centrifugal force, the medium is forced to move toward the pump body outlet, thereby generating liquid flow and realizing medium circulation flow. After stabilization, collect relevant test data, record the turbine flowmeter data, and complete the circulation volume test experiment. The overall structure is simple. Only the rear shaft head bolt and the rear bearing chamber on the shielded pump are replaced. By simulating the flow of circulating fluid in the shaft, the circulating fluid flow rate is measured very accurately, solving the problem that the circulating fluid flow rate in the shaft cannot be measured. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] Figure 1 It is a schematic diagram of the overall structure of the utility model.
[0014] Figure 2 This is a schematic diagram of the planar structure of the in-shaft circulating shielded pump.
[0015] In the figure: 1. test pipeline; 2. turbine flowmeter; 3. rear bearing chamber test fixture; 4. throttle hole; 5. rear shaft head bolt; 6. shaft center hole; 7. pump body; 8. base; 9. bracket; 10. rotor assembly; 11. stator assembly; 12. impeller; 13. bushing; 14. thrust plate; 15. rotating bearing; 16. rotating shaft. DETAILED DESCRIPTION
[0016] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only 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.
[0017] The utility model provides Figure 1-2The shielded pump shaft internal circulation type circulation volume test device shown in the figure comprises a base 8 and a pump body 7. The surface of the base 8 is fixedly connected with a bracket 9. The top of the bracket 9 is fixedly connected with the pump body 7. The rear bearing chamber of the pump body 7 is replaced with a rear bearing chamber test fixture 3. A throttle hole 4 is opened on the surface of the rear bearing chamber test fixture 3. A test pipeline 1 is fixedly connected between the throttle hole 4 and the output end of the pump body 7. Specifically, the test pipeline 1 is led from the rear bearing chamber test fixture 3 to the inlet flange of the pump body 7. A turbine flowmeter 2 is fixedly connected to the surface of the test pipeline 1. When conducting a circulation volume test experiment, the rear bearing chamber test fixture 3 is replaced with a throttle hole 4. The test pipeline 1 is connected to the inlet flange of the pump body 7. When conducting a circulation volume test experiment, the ... The shaft head bolt 5, the center hole of the rear shaft head bolt 5 is cancelled, the rear bearing chamber is replaced by the rear bearing chamber test fixture 3, the test pipeline 1 is led from the rear bearing chamber test fixture 3 to the inlet flange of the pump body 7 to form a circulation loop, the pump is started to run, and the relevant test data is collected after it stabilizes, and the data of the turbine flowmeter 2 is recorded to complete the circulation volume test experiment. The overall structure is simple, only the rear shaft head bolt 5 and the rear bearing chamber on the shielded pump are replaced, and the circulating fluid flow is measured very accurately by simulating the flow of the circulating fluid in the shaft, which solves the problem that the circulating fluid flow in the shaft cannot be measured.
[0018] In this embodiment, the front bearing chamber and the rear bearing chamber in the pump body 7 are both provided with a sleeve 13, and a rotating bearing 15 is installed on the surface of the sleeve 13. The pump body 7, the rear bearing chamber and the stator assembly 11 are fixedly connected by connecting bolts to form a sealed whole. The stator assembly 11 and the rotor assembly 10 are sequentially arranged on the pump body 7 from the outside to the inside. The inner wall of the stator assembly 11 is fixedly connected with a rotating shaft 16 by a shaft head bolt 5, and the two ends of the rotating shaft 16 are respectively over-matched with the rotating bearing 15 in the front bearing chamber and the rear bearing chamber. A shaft center hole 6 is arranged inside the rotating shaft 16, and the shaft center hole 6 has the same size as the throttle hole 4. One end of the rotating shaft 16 is fixed. An impeller 12 is connected, and a thrust plate 14 is keyed inside the rotor assembly 10; a thrust plate 14 is installed in the center of the rotor assembly 10 to support the radial and axial loads of the impeller 12. The thrust plate 14 supports and balances the impeller 12, thereby reducing the load on the bearing. The coordinated operating parts jointly realize the normal operation of the shielded pump. The impeller 12 rotates through the support of the rotating bearing 15 and the rotating shaft 16. The impeller 12 generates centrifugal force through rotation, so that the medium is sucked into the pump body 7. Under the action of centrifugal force, the medium is forced to move toward the outlet direction of the pump body 7, thereby generating liquid flow and realizing medium circulation.
[0019] Working principle of the utility model: the utility model is a shielded pump shaft internal circulation type circulation volume test device. When conducting a circulation volume test experiment, the rear shaft head bolt 5 is replaced, the center hole of the rear shaft head bolt 5 is cancelled, the rear bearing chamber is replaced with a rear bearing chamber test fixture 3, and the test pipeline 1 is led from the rear bearing chamber test fixture 3 to the inlet flange of the pump body 7 to form a circulation loop. The pump is started and the impeller 12 rotates through the support of the rotating bearing 15 and the rotating shaft 16. The impeller 12 generates centrifugal force through rotation, so that the medium is sucked into the pump body 7. Under the action of centrifugal force, the medium is forced to move toward the outlet direction of the pump body 7, thereby generating liquid flow and realizing medium circulation flow. After stabilization, relevant test data are collected and the data of the turbine flowmeter 2 is recorded to complete the circulation volume test experiment.
[0020] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.
Claims
1. A canned pump shaft internal circulation type circulation volume test device, characterized in that: The pump comprises a base (8) and a pump body (7), wherein a bracket (9) is fixedly connected to the surface of the base (8), the top of the bracket (9) is fixedly connected to the pump body (7), the rear bearing chamber of the pump body (7) is replaced by a rear bearing chamber test fixture (3), a throttle hole (4) is opened on the surface of the rear bearing chamber test fixture (3), a test pipeline (1) is fixedly connected between the throttle hole (4) and the output end of the pump body (7), specifically, the test pipeline (1) is led from the rear bearing chamber test fixture (3) to the inlet flange of the pump body (7), and a turbine flowmeter (2) is fixedly connected to the surface of the test pipeline (1).
2. A canned motor pump shaft internal circulation type circulation volume testing device according to claim 1, characterized in that: The front bearing chamber and the rear bearing chamber in the pump body (7) are both provided with shaft sleeves (13), and a rotating bearing (15) is mounted on the surface of the shaft sleeves (13). The pump body (7), the rear bearing chamber and the stator assembly (11) are fixedly connected by connecting bolts to form a sealed whole.
3. A canned motor pump shaft internal circulation type circulation volume testing device according to claim 1, characterized in that: The pump body (7) is provided with a stator assembly (11) and a rotor assembly (10) in sequence from the outside to the inside.
4. A canned motor pump shaft internal circulation type circulation volume testing device according to claim 3, characterized in that: The inner side wall of the stator assembly (11) is fixedly connected to a rotating shaft (16) via a shaft head bolt (5), and both ends of the rotating shaft (16) are overfitted with the rotating bearings (15) in the front bearing chamber and the rear bearing chamber, respectively.
5. A canned motor pump shaft internal circulation type circulation volume testing device according to claim 4, characterized in that: The rotating shaft (16) is provided with a shaft center hole (6) inside, and the shaft center hole (6) has the same size as the throttle hole (4).
6. A canned motor pump shaft internal circulation type circulation volume testing device according to claim 4, characterized in that: One end of the rotating shaft (16) is fixedly connected to an impeller (12), and a thrust plate (14) is key-connected inside the rotor assembly (10).