Suppression device for structural resonance of vertical condensate pump
By incorporating a suppression device consisting of mass, stiffness, and damping modules into the condensate pump structure, the high cost and low efficiency of condensate pump resonance problems have been solved, achieving rapid and effective resonance suppression and improving operational safety and flexibility.
Patent Information
- Application Number
- CN202520049921.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-09
- Publication Date
- 2026-01-30
- Estimated Expiration
- 2035-01-09
AI Technical Summary
Existing technologies are costly and inefficient in addressing condensate pump resonance issues, and dynamic balancing tests and structural reinforcement methods require multiple attempts, resulting in a long treatment cycle.
Design a suppression device including a base, a mass module, a stiffness module, and a damping module. By setting the mass module and stiffness module on the top of the motor end of a vertical condensate pump structure, and working with the damping module to consume resonance energy, resonance is suppressed.
It can quickly and efficiently suppress condensate pump resonance, reduce motor vibration by 40-50%, improve operational flexibility, reduce plant power consumption, and promote the economical and safe operation of thermal power units.
Smart Images
Figure CN223854524U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to the technical field of power generation, specifically is a kind of for vertical condensate pump structure resonance's inhibiting device. BACKGROUND
[0002] In order to promote the consumption of new energy power, the traditional thermal power generating unit generally enters long-period deep peaking condition, and the adaptability of main auxiliary machine performance of thermal power generation system to deep peaking condition gradually attracts attention. Condensate pump is an important auxiliary machine of thermal power generation, and is generally arranged in vertical structure. Its function is to transport condensate from condensate tank to deaerator. In the process of deep peaking of unit, in order to save plant power rate, condensate pump generally runs with reduced frequency along with load reduction of unit, and in this process, condensate pump motor vibration often exceeds standard, which seriously threatens equipment operation safety. Research shows that the cause of the problem is that condensate pump runs to the inherent frequency interval of system, thereby generating structural resonance.
[0003] At present, the method for treating condensate pump resonance problem generally includes dynamic balance test, enhancing structural strength, changing condensate pump impeller design or pipeline arrangement form, etc. Since the investment of changing condensate pump impeller design or pipeline arrangement form is large, enterprises generally do not adopt it. Dynamic balance test sometimes cannot completely solve condensate pump resonance problem, and often needs to be combined with the way of increasing structural stiffness to jointly treat the problem, and the treatment cycle is relatively long, and often needs to be tried several times to solve it.
[0004] In view of the problem, it is necessary to design and develop a kind of vertical condensate pump structure resonance's inhibiting device, which can quickly and efficiently treat the problem, effectively improve the safety and flexibility of condensate pump in low-frequency operation process, and reduce plant power rate. SUMMARY
[0005] The utility model aims at providing a kind of vertical condensate pump structure resonance's inhibiting device, solve the defect of high cost and low efficiency existing in the treatment of condensate pump resonance problem at present.
[0006] In order to achieve the above purpose, the utility model adopts the technical scheme that:
[0007] The utility model provides a kind of vertical condensate pump structure resonance's inhibiting device, including inhibiting device body, the inhibiting device body includes base, mass module, stiffness module and damping module, wherein:
[0008] The lower surface of the base is fixedly installed at the top of the motor end of the vertical condensate pump structure, the upper surface of the base is fixedly installed with stiffness module, and the free end of the stiffness module is fixedly connected with mass module;
[0009] The damping module is arranged between the base and the mass module.
[0010] Preferably, the upper surface of the base is fixedly provided with a first damping connector, the free end of the first damping connector is fixed to the lower surface of the damping module, the upper surface of the damping module is fixedly connected with a second damping connector, and the free end of the second damping connector is fixedly connected to the mass module.
[0011] Preferably, the mass ratio of the mass module to the vertical condensate pump structure is in the range of 0.005 to 0.03.
[0012] Preferably, the damping device body further comprises a packaging module, one end of the packaging module is fixedly provided on the base, and the other end of the packaging module is fixedly provided with the mass module; the stiffness module and the damping module are both packaged in the packaging module.
[0013] Preferably, the stiffness module is a spring body.
[0014] Preferably, the base and the top of the motor end of the vertical condensate pump structure are connected by bolts.
[0015] Preferably, a plurality of damping device bodies are provided, and the plurality of damping device bodies are uniformly distributed along the circumference of the top of the motor end of the vertical condensate pump structure.
[0016] Preferably, the upper surface of the base is fixedly provided with a first damping connector, the free end of the first damping connector is fixed to the lower surface of the damping module, the upper surface of the damping module is fixedly connected with a second damping connector, and the free end of the second damping connector is fixedly connected to the mass module; the base and the top of the motor end of the vertical condensate pump structure are connected by bolts.
[0017] Preferably, the upper surface of the base is fixedly provided with a first damping connector, the free end of the first damping connector is fixed to the lower surface of the damping module, the upper surface of the damping module is fixedly connected with a second damping connector, and the free end of the second damping connector is fixedly connected to the mass module; the mass ratio of the mass module to the vertical condensate pump structure is in the range of 0.005 to 0.03.
[0018] Preferably, the upper surface of the base is fixedly provided with a first damping connector, the free end of the first damping connector is fixed to the lower surface of the damping module, the upper surface of the damping module is fixedly connected with a second damping connector, and the free end of the second damping connector is fixedly connected to the mass module; the damping device body further comprises a packaging module, one end of the packaging module is fixedly provided on the base, and the other end of the packaging module is fixedly provided with the mass module; the stiffness module and the damping module are both packaged in the packaging module.
[0019] Compared with the prior art, the utility model has the advantages of
[0020] The utility model provides a kind of for vertical condensate pump structure resonance's inhibiting device, by setting quality module and rigidity module in the motor end top of vertical condensate pump structure, to cooperate to offset the structure resonance generated by original condensate pump system, by setting damping module in the motor end top of vertical condensate pump structure can consume the energy generated by structure resonance, the utility model improves the operation flexibility of vertical condensate pump, reduces plant power rate, promotes the economic, safe operation of thermal power generating unit.
[0021] Further, the purpose of arranging multiple inhibiting device bodies in the circumferential direction is to reduce the overall vibration of the condensate pump motor, and the design parameters of the multiple inhibiting device bodies are consistent, which facilitates balancing the vibration of the entire system, while enabling the volume of the entire inhibiting device body to be smaller and the vibration suppression effect to be better.
[0022] Further, the mass ratio of the quality module to the vertical condensate pump structure is set to 0.005-0.03, which has good inhibiting effect on the condensate pump structure resonance phenomenon. BRIEF DESCRIPTION OF DRAWINGS
[0023] Figure 1 It is a top view installation schematic diagram of a kind of for vertical condensate pump structure resonance's inhibiting device;
[0024] Figure 2 It is the structure principle schematic diagram of vertical condensate pump structure resonance's inhibiting device;
[0025] Figure 3 It is the installation front view of vertical condensate pump structure resonance's inhibiting device;
[0026] Wherein, 1, base;2, quality module;3, rigidity module;4, damping module;5, first damping connecting piece;6, second damping connecting piece;7, encapsulation module;8, vertical condensate pump structure main system structure equipment body;9, first vertical condensate pump structure main system rigidity;10, second vertical condensate pump structure main system rigidity;11, vertical condensate pump structure installation foundation;12, the motor end of vertical condensate pump structure. DETAILED DESCRIPTION
[0027] In the following description, specific details are set forth such as specific system structures, techniques, etc., in order to provide a thorough understanding of the embodiments of the present application. However, it should be apparent to those skilled in the art that the present application can be practiced in other embodiments that depart from these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present application with unnecessary detail.
[0028] Embodiment 1
[0029] The embodiment provides a structure resonance suppression device for a vertical condensate pump, and mainly aims at excessive vibration displacement.
[0030] The structure resonance suppression device comprises a base 1, a mass module 2, a stiffness module 3 and a damping module 4, wherein:
[0031] The lower surface of the base 1 is fixedly installed at the top of the motor end of the vertical condensate pump structure, the upper surface of the base 1 is fixedly installed with the stiffness module 3, and the free end of the stiffness module 3 is fixedly connected with the mass module 2.
[0032] The upper surface of the base 1 is fixedly installed with a first damping connecting piece 5, the free end of the first damping connecting piece 5 is fixed at the lower surface of the damping module 4, the upper surface of the damping module 4 is fixedly connected with a second damping connecting piece 6, and the free end of the second damping connecting piece 6 is fixedly connected on the mass module 2.
[0033] In the embodiment, the structure resonance generated by the original condensate pump system is offset by the cooperation of the mass module 2 and the stiffness module 3, and the damping module 4 can consume the energy generated by the structure resonance.
[0034] The working principle of the embodiment is as follows:
[0035] Figure 2 In the embodiment, the structure resonance suppression device mainly aims at excessive vibration displacement of the vertical condensate pump structure main system structure equipment body 8 after being subjected to external force. According to Figure 2 The vibration differential equation can be established, and the optimal stiffness value and the optimal damping value of the stiffness module and the damping module of the vibration suppression device of the vertical condensate pump structure resonance can be obtained by solving the equation. Details are as follows:
[0036] According to the principle diagram of the vibration suppression device shown in the drawings, Figure 2 The vibration differential equation of the vibration suppression device can be listed as follows:
[0037]
[0038] The exciting force of the main system is defined as P(t), the main system structure equipment body is m1, the vibration suppression device is m2, the structure stiffness of the main system is k1, the structure stiffness of the vibration suppression device is k2, the original system vibration displacement The main system vibration frequency The vibration frequency of the vibration suppression device The mass ratio of the vibration suppression device to the main system The vibration frequency ratio of the vibration suppression device to the main system , the ratio of the frequency of the exciting force to the vibration frequency of the main system (natural frequency ratio) , the damping ratio of the damping device , the amplitude of the main system after the damping device is added to the system is , then , , , , , Substitute the vibration differential equation to solve, the ratio of the displacement vibration response of the main system after the damping device is added to the main system without the damping device is is , , , and other parameters.
[0039] Analysis shows that the greater the mass of the damping device, the wider the damping frequency band, and the better the damping effect, but in actual engineering applications, it is desirable to have the smallest additional mass to the original system, so the mass of the damping device should be selected according to the actual engineering situation. In the calculation process, the mass ratio and the natural frequency ratio are kept constant, and the value of the damping ratio is changed, so that the optimal frequency ratio and the optimal damping ratio can be obtained.
[0040] Example 2
[0041] On the basis of example 1, the damping device for suppressing the resonance of the vertical condensate pump structure provided in this embodiment is connected by bolts between the base 1 and the top of the motor end of the vertical condensate pump structure.
[0042] Example 3
[0043] On the basis of example 1, the damping device for suppressing the resonance of the vertical condensate pump structure provided in this embodiment has a mass module 2, and the mass ratio of the mass module 2 to the vertical condensate pump structure is in the range of 0.005 to 0.03.
[0044] In this embodiment, the mass ratio between the mass module and the vertical condensate pump structure has good inhibitory effect on the resonance phenomenon of the condensate pump structure.
[0045] Example 4
[0046] On the basis of example 1, the damping device for suppressing the resonance of the vertical condensate pump structure provided in this embodiment further comprises a packaging module 7, and the stiffness module 3 and the damping module 4 are packaged in the packaging module 7.
[0047] One end of the packaging module 7 is fixed on the base 1, and the mass module 2 is arranged at the other end of the packaging module 7.
[0048] Embodiment 5
[0049] On the basis of embodiment 1, the mass module is a mass block, and the stiffness module is a spring body.
[0050] Embodiment 6
[0051] The suppression device for the structural resonance of the vertical condensate pump structure comprises a plurality of suppression device bodies, and the plurality of suppression device bodies are uniformly distributed along the circumferential direction of the top of the motor end of the vertical condensate pump structure.
[0052] Each suppression device body comprises a base 1, a mass module 2, a stiffness module 3, and a damping module 4, wherein:
[0053] The lower surface of the base 1 is fixedly installed on the top of the motor end of the vertical condensate pump structure, the upper surface of the base 1 is fixedly installed with the stiffness module 3, and the free end of the stiffness module 3 is fixedly connected with the mass module 2.
[0054] The upper surface of the base 1 is fixedly installed with the first damping connecting piece 5, the free end of the first damping connecting piece 5 is fixed on the lower surface of the damping module 4, the upper surface of the damping module 4 is fixedly connected with the second damping connecting piece 6, and the free end of the second damping connecting piece 6 is fixedly connected on the mass module 2.
[0055] In this embodiment, the mass module 2 and the stiffness module 3 cooperate to offset the structural resonance generated by the original condensate pump system, and the damping module 4 can consume the energy generated by the structural resonance.
[0056] The suppression device is applied to the structural resonance problem generated in the low-frequency operation process of the condensate pump under the deep regulation working condition of the thermal power unit, can reduce the vibration value of the non-driving end of the motor by about 40-50%, the vibration value is obviously reduced, the operation flexibility is improved, the auxiliary power consumption rate is reduced, and the economic and safe operation of the thermal power unit is promoted.
[0057] Meanwhile, the purpose of arranging a plurality of suppression device bodies in the circumferential direction is to reduce the overall vibration of the condensate pump motor, and the design parameters of the plurality of suppression device bodies are consistent, so as to balance the vibration of the whole system, and at the same time, the volume of the whole suppression device body can be reduced, and the vibration suppression effect is better.
[0058] The above-described embodiments are only used to illustrate the technical solutions of the present application, but not limit them; although the present application is described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement to part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application, and should be included in the protection scope of the present application.
Claims
1. A device for damping the structural resonance of a vertical condensate pump, characterized in that The suppression device body comprises a base, a mass module, a rigidity module and a damping module, wherein: The lower surface of the base is fixedly installed on the top of the motor end of the vertical condensate pump structure, the upper surface of the base is fixedly installed with the rigidity module, and the free end of the rigidity module is fixedly connected with the mass module. The damping module is arranged between the base and the mass module.
2. A device for suppressing the structural resonance of a vertical condensate pump according to claim 1, characterized in that The upper surface of the base is fixedly installed with a first damping connecting piece, the free end of the first damping connecting piece is fixed on the lower surface of the damping module, the upper surface of the damping module is fixedly connected with a second damping connecting piece, and the free end of the second damping connecting piece is fixedly connected on the mass module.
3. A device for suppressing the structural resonance of a vertical condensate pump according to claim 1, characterized in that The mass ratio of the mass module to the vertical condensate pump structure ranges from 0.005 to 0.
03.
4. A device for suppressing the structural resonance of a vertical condensate pump according to claim 1, characterized in that The suppression device body further comprises a packaging module, one end of the packaging module is fixedly installed on the base, and the other end of the packaging module is fixedly installed with the mass module; the rigidity module and the damping module are both packaged in the packaging module.
5. A device for suppressing the structural resonance of a vertical condensate pump according to claim 1, characterized in that The rigidity module is a spring body.
6. A device for suppressing the structural resonance of a vertical condensate pump according to claim 1, characterized in that The base and the top of the motor end of the vertical condensate pump structure are connected through bolts.
7. A device for suppressing the structural resonance of a vertical condensate pump according to claim 1, characterized in that A plurality of suppression device bodies are provided, and the plurality of suppression device bodies are uniformly distributed along the circumference of the top of the motor end of the vertical condensate pump structure.
8. A device for suppressing the structural resonance of a vertical condensate pump according to claim 1, characterized in that The upper surface of the base is fixedly installed with a first damping connecting piece, the free end of the first damping connecting piece is fixed on the lower surface of the damping module, the upper surface of the damping module is fixedly connected with a second damping connecting piece, and the free end of the second damping connecting piece is fixedly connected on the mass module; the base and the top of the motor end of the vertical condensate pump structure are connected through bolts.
9. A device for suppressing the structural resonance of a vertical condensate pump according to claim 1, characterized in that The upper surface of the base is fixedly installed with a first damping connecting piece, the free end of the first damping connecting piece is fixed on the lower surface of the damping module, the upper surface of the damping module is fixedly connected with a second damping connecting piece, and the free end of the second damping connecting piece is fixedly connected on the mass module; the mass ratio of the mass module to the vertical condensate pump structure ranges from 0.005 to 0.
03.
10. A device for suppressing the structural resonance of a vertical condensate pump according to claim 1, characterized in that The upper surface of the base is fixedly installed with a first damping connecting piece, the free end of the first damping connecting piece is fixed on the lower surface of the damping module, the upper surface of the damping module is fixedly connected with a second damping connecting piece, and the free end of the second damping connecting piece is fixedly connected on the mass module; the suppression device body further comprises a packaging module, one end of the packaging module is fixedly installed on the base, and the other end of the packaging module is fixedly installed with the mass module; the rigidity module and the damping module are both packaged in the packaging module.