Device for reducing pressure fluctuation of screw lubricating oil pump
By designing a device including a lubricating oil tank, oil pump and pipeline, the switching process of the oil pump is controlled, which alleviates the pressure fluctuations during the screw pump when starting, and improves the service life of the compressor.
Patent Information
- Application Number
- CN202310786482.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2023-06-29
- Publication Date
- 2024-12-31
AI Technical Summary
The pressure fluctuations generated by the screw pump during startup have an impact on the service life of the compressor, and the prior art is difficult to effectively alleviate.
A device including lubricating oil tank, oil pump 1 and oil pump 2, oil extraction pipe, oil transfer pipe and return pipe is designed. By controlling the outlet valve and return valve, the oil pump is slowly switched to stabilize the oil pressure, thereby reducing the pressure fluctuation during the start-up moment.
It effectively alleviates the pressure fluctuation during the start of the screw pump, improves the service life of the compressor, and has great application value.
Smart Images
Figure CN119222158A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the field of electric power technology, and in particular to a device for reducing pressure fluctuation of a screw lubricating oil pump. Background Art
[0002] The screw pump is composed of two screws rotating left and right that mesh with each other in the pump housing, so that the medium is sucked in from the inlet side, and the fluid is transported through various effects such as pressure and suction in the sealed working chamber. Due to the pressure change of the liquid in the pump chamber, an inertial force from low to high is generated. When the liquid passes through the sealed cavity, a large amount of inertial flow, pressure pulsation and vibration will occur. However, the meshing gap of the screw pump is relatively small, and the number of blades is relatively small, which makes it easy to fluctuate. When the screw pump is working, the inhaled liquid will enter the sealed space surrounded by the thread and the pump housing. When the screw rotates, the sealed volume of the screw pump will be squeezed by the thread, thereby increasing the pressure of the screw pump and moving along the axial direction. The screw rotates at a constant speed, so the liquid also flows out evenly. Therefore, when the screw pump is started at the power frequency, the pressure after the pump will instantly reach the rated value. Therefore, the pressure fluctuation generated by the screw pump at the moment of starting affects the compressor, resulting in a reduction in service life. Summary of the invention
[0003] The purpose of the present invention is to reduce the pressure fluctuations generated when the screw pump is switched. A device for reducing the pressure fluctuations of the screw lubricating oil pump is proposed, which can effectively alleviate the impact of the pressure fluctuations generated at the moment of starting the screw pump on the compressor, thereby increasing the service life of the compressor.
[0004] The technical solution adopted by the present invention is: a device for reducing the pressure fluctuation of a screw lubricating oil pump, comprising a lubricating oil tank, an oil pump 1 and an oil pump 2 are arranged above the lubricating oil tank, the suction ends of the oil pump 1 and the oil pump 2 are respectively provided with an oil extraction pipe 1 and an oil extraction pipe 2 connected to the lubricating oil tank, the discharge ends of the oil pump 1 and the oil pump 2 are respectively provided with an oil delivery pipe 1 and an oil delivery pipe 2, the oil delivery pipe 1 and the oil delivery pipe 2 are connected to an output main pipe, and the oil delivery pipe 1 and the oil delivery pipe 2 are respectively connected to the lubricating oil tank through a return pipe 1 and a return pipe 2.
[0005] As a further improvement of the present invention, the oil extraction pipe 1 and the oil extraction pipe 2 are respectively provided with an outlet valve 1 and an outlet valve 2, which are control valves of the oil extraction pipe 1 and the oil extraction pipe 2 respectively.
[0006] As a further improvement of the present invention, a reflux valve 1 and a reflux valve 2 are respectively provided on the reflux pipe 1 and the reflux pipe 2, which are control valves of the reflux pipe 1 and the reflux pipe 2 respectively.
[0007] The beneficial effects of the present invention are as follows: when two screw pumps are switched, due to the characteristics of the screw pumps, the pressure will rise rapidly when the two screw pumps are connected in parallel, and the pneumatic pressure regulating valve will not respond in time, resulting in pressure fluctuations. The present invention can effectively alleviate the influence of the pressure fluctuations generated at the moment of starting the screw pump on the compressor, thereby increasing the service life of the compressor, and has great application value and promotion value. BRIEF DESCRIPTION OF THE DRAWINGS
[0008] Figure 1 It is a structural schematic diagram of a device for reducing pressure fluctuation of a screw lubricating oil pump according to the present invention;
[0009] Figure 2 The present invention is a schematic flow diagram of a device for reducing pressure fluctuations in a screw lubricating oil pump.
[0010] As shown in the figure: 1. Lubricating oil tank; 2. Oil pump one; 3. Oil pump two; 4. Oil intake pipe one; 5. Oil intake pipe two; 6. Oil delivery pipe one; 7. Oil delivery pipe two; 8. Output main pipe; 9. Return pipe one; 10. Return pipe two; 11. Outlet valve one; 12. Outlet valve two; 13. Return valve one; 14. Return valve two. DETAILED DESCRIPTION
[0011] In order to make the technical problems, technical solutions and beneficial effects to be solved by this application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and implementation methods. It should be understood that the implementation methods described herein are only used to explain this application and are not used to limit this application.
[0012] Embodiment 1:
[0013] The present invention provides Figure 1 , Figure 2 The device for reducing the pressure fluctuation of the screw lubricating oil pump shown in the figure comprises a lubricating oil tank 1, characterized in that: an oil pump 1 2 and an oil pump 2 3 are arranged above the lubricating oil tank 1, the suction ends of the oil pump 1 2 and the oil pump 2 3 are respectively provided with an oil extraction pipe 1 4 and an oil extraction pipe 2 5 connected to the lubricating oil tank 1, the discharge ends of the oil pump 1 2 and the oil pump 2 3 are respectively provided with an oil delivery pipe 1 6 and an oil delivery pipe 2 7, the oil delivery pipe 1 6 and the oil delivery pipe 2 7 are connected with an output main pipe 8, and the oil delivery pipe 1 6 and the oil delivery pipe 2 7 are respectively connected to the lubricating oil tank 1 through a return pipe 1 9 and a return pipe 2 10. The oil extraction pipe 1 4 and the oil extraction pipe 2 5 are respectively provided with an outlet valve 1 11 and an outlet valve 2 12, which are used to control the circulation and closing of the oil extraction pipe 1 4 and the oil extraction pipe 2 5 respectively. The reflux pipe 1 9 and the reflux pipe 2 10 are respectively provided with a reflux valve 13 and a reflux valve 2 14 for controlling the flow and closing of the reflux pipe 1 9 and the reflux pipe 2 10 respectively.
[0014] Embodiment 2:
[0015] In summary, if Figure 1 and Figure 2 As shown, during use, when it is necessary to switch oil pump 12 to oil pump 23, oil pump 12 keeps outlet valve 11 closed, and controls outlet valve 212 to open before oil pump 23 starts. During switching, oil pump 12 and oil pump 23 operate in parallel, and return valve 214 behind oil pump 23 is slowly fully closed, while return valve 13 behind oil pump 12 is slowly fully opened. When the oil pressure is stable, oil pump 12 is stopped and oil pump 23 starts working, i.e., the switching is completed, which can effectively alleviate the influence of pressure fluctuation generated at the moment of starting the screw pump on the compressor and increase the service life of the compressor.
[0016] Embodiment three:
[0017] In summary, if Figure 1 and Figure 2 As shown, during use, when it is necessary to switch oil pump 23 to oil pump 12, oil pump 23 keeps outlet valve 212 closed, and controls outlet valve 11 to be opened before oil pump 22 is started. During switching, oil pump 23 and oil pump 12 are operated in parallel, and the return valve 13 behind oil pump 12 is slowly fully closed, and the return valve 214 behind oil pump 23 is slowly fully opened. When the oil pressure is stable, oil pump 23 is stopped and oil pump 12 is started, that is, the switching is completed, which can effectively alleviate the influence of the pressure fluctuation generated at the moment of starting the screw pump on the compressor and improve the service life of the compressor.
[0018] The above implementation modes are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned implementation modes, a person skilled in the art should understand that the technical solutions described in the aforementioned implementation modes can still be modified, or some of the technical features can be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the implementation modes of the present invention.
Claims
1. A device for reducing pressure fluctuations of a screw lubricating oil pump, comprising a lubricating oil tank (1), characterized in that: An oil pump 1 (2) and an oil pump 2 (3) are arranged above the lubricating oil tank (1); the suction ends of the oil pump 1 (2) and the oil pump 2 (3) are respectively provided with an oil extraction pipe 1 (4) and an oil extraction pipe 2 (5) which are connected to the lubricating oil tank (1); the discharge ends of the oil pump 1 (2) and the oil pump 2 (3) are respectively provided with an oil delivery pipe 1 (6) and an oil delivery pipe 2 (7); the oil delivery pipe 1 (6) and the oil delivery pipe 2 (7) are connected to an output main pipe (8); the oil delivery pipe 1 (6) and the oil delivery pipe 2 (7) are respectively connected to the lubricating oil tank (1) through a return pipe 1 (9) and a return pipe 2 (10).
2. The device for reducing pressure fluctuation of a screw lubricating oil pump according to claim 1, characterized in that: The oil extraction pipe 1 (4) and the oil extraction pipe 2 (5) are respectively provided with an outlet valve 1 (11) and an outlet valve 2 (12).
3. The device for reducing pressure fluctuation of a screw lubricating oil pump according to claim 1, characterized in that: The reflux pipe 1 (9) and the reflux pipe 2 (10) are respectively provided with a reflux valve 1 (13) and a reflux valve 2 (14).