Vibration monitoring system for pumped storage unit

Abstract

The utility model discloses a pumped storage unit vibration monitoring system, which relates to the technical field of motor unit monitoring and comprises a mounting assembly for placing a unit to be monitored, a sensing assembly fixedly arranged on the mounting assembly, a vibration sensor arranged on the sensing assembly and a damping base connected to the mounting assembly. A double-layer damping structure is sequentially connected in the damping base from top to bottom; by arranging the mounting assembly, a mounting position is provided for the to-be-detected unit, so that the to-be-detected unit is in a stable mounting environment, and monitoring is facilitated; through the arrangement of the vibration reduction base, vibration generated when the unit operates can be transmitted to the ground or the wall surface after being subjected to vibration reduction and filtration through the vibration reduction base, so that the vibration transmitted to the ground or the wall surface is greatly reduced, the influence on the surrounding environment is avoided, and the installation stability of the unit is improved; by arranging the vibration sensor and the alarm, vibration signals of the unit can be collected conveniently, early warning is conducted, and vibration monitoring of the pumped storage unit is achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to motor unit monitoring technical field, concretely relates to a pumped storage unit vibration monitoring system. BACKGROUND

[0002] With the rapid development of pumped storage power station engineering construction, the energy storage unit is more and more developed to high water head, high speed, high efficiency and large capacity, which will inevitably bring more operation stability problems. Large pumped storage units are continuously put into operation, and timely discovery, rapid diagnosis and elimination of early fault hidden danger of pumped storage units are important guarantees for safe and reliable operation of power generation equipment. The safe and reliable operation of the unit depends largely on its vibration. If the key mechanical components of the unit continue to run after damage or abnormality occurs during actual operation, it will induce abnormal vibration changes of the motor. For the unit that has been in abnormal vibration operation for a long time, its mechanical and electrical performance will be greatly reduced. If not timely maintenance, it will often lead to irreversible damage to the key components of the unit, reduce the service life of the unit and destroy the system operation stability, so it is necessary to monitor and early warn the vibration state of the unit.

[0003] The existing monitoring equipment, such as a motor vibration monitoring system disclosed in publication No. CN102889969A, the sensor of the system is installed on the bottom plate and located at the corresponding position of the two ends of the motor. The sensor is connected with the signal receiving module through the signal line plug. The signal processing device is connected with the signal receiving module, the signal processing device, the power supply and the display device. The signal receiving module, the signal processing device, the power supply and the display device are commonly installed in the portable box. However, since the vibration amplitude or frequency of the unit is easy to cause the influence on the installation environment when the unit vibrates, thereby affecting the installation stability of the unit, the above monitoring system can only monitor when working and does not have the auxiliary damping function, which leads to the failure to meet the use requirement. UTILITY MODEL CONTENTS

[0004] The utility model aims at the deficiency existing in the above-mentioned technology, and provides a pumped storage unit vibration monitoring system, which aims at solving the problem that the traditional monitoring system does not have the auxiliary damping function.

[0005] The utility model provides a pumped storage unit vibration monitoring system, which comprises:

[0006] The installation assembly is used for placing the unit to be measured.

[0007] The induction assembly is fixedly arranged on the installation assembly, and the vibration sensor is arranged on the induction assembly.

[0008] The damping base is connected to the installation assembly, and the double-layer damping structure is sequentially connected in the damping base from top to bottom.

[0009] An alarm is arranged on the damping base, and the alarm is electrically connected with the vibration sensor.

[0010] Preferably, the mounting assembly comprises a mounting plate and a placing table, the placing table is detachably fixed on the top of the mounting plate, supports are arranged on both sides of the placing table, notches are arranged on the top of the supports, and the two notches cooperatively form an installation space for mounting and placing the machine group to be measured.

[0011] The damping base comprises a limiting pad and a shell, a positioning cylinder is arranged on the upper surface of the limiting pad, one end of the shell is inserted into the positioning cylinder, the other end of the shell is threadedly connected with the locking hole, and the damping structure is arranged in the shell.

[0012] Preferably, the two damping structures are connected through an inner screw rod, the top of the inner screw rod penetrates through the shell and is threadedly connected with the bolt. The damping structure comprises a spring and a damping pad connected below the spring, the spring on the upper damping structure abuts against the inner wall on the top of the shell, and the springs on the lower damping structures respectively abut between the two damping pads.

[0013] Preferably, the sensing assembly comprises a dustproof cover, a magnet, a magnetic strip and a mounting shell detachably fixed on the mounting plate, the magnetic strip is arranged around the opening edge of the lower part of the dustproof cover, the magnetic strip and the magnet are fixed on the mounting shell, the magnet is arranged in the dustproof cover, and the vibration sensor is fixedly arranged on the top of the magnet. The vibration sensor is a magneto-integrated vibration transmitter. The dustproof cover is a hemispherical mesh cover shell.

[0014] The alarm comprises a buzzer alarm and a wireless communicator, and the wireless communicator is used for sending a warning signal to an external terminal device.

[0015] Compared with the prior art, the present application has the following beneficial effects:

[0016] By arranging the mounting assembly, an installation position is provided for the machine group to be measured, so that the machine group is in a stable installation environment, which is conducive to the monitoring. By arranging the damping base, when the machine group operates, the vibration generated by the machine group is first filtered by the damping base before being transmitted to the ground or the wall surface, so that the vibration transmitted to the ground or the wall surface is greatly reduced, thereby avoiding the influence on the surrounding environment and improving the stability of the machine group installation. By arranging the vibration sensor and the alarm, the vibration signal of the machine group can be collected and a warning can be given, so as to realize the vibration monitoring of the pumped storage power generating unit. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical scheme in the embodiments of the present application, the drawings needed to be used in the following embodiment description will be briefly introduced, and obviously, the drawings in the following description are only preferred embodiments of the present application, and other drawings can also be obtained according to these drawings without creative labor for those skilled in the art.

[0018] Figure 1 It is a part structure schematic view of the pumped storage unit vibration monitoring system of the present application.

[0019] Figure 2 It is a part structure schematic view of the pumped storage unit vibration monitoring system of the present application.

[0020] Figure 3 It is a part sectional structure schematic view of the induction assembly of the present application.

[0021] Figure 4 It is a part structure schematic view of the damping base of the present application.

[0022] In the figure, 1 is a mounting assembly; 11 is a mounting plate; 111 is a protruding part; 12 is a placing table; 13 is a support; 2 is an induction assembly; 21 is a vibration sensor; 22 is a dust cover; 23 is a magnet; 24 is a magnetic strip; 25 is a mounting shell; 3 is a damping base; 31 is a limiting pad; 32 is a shell; 33 is a positioning cylinder; 34 is an inner screw rod; 35 is a spring; 36 is a damping pad. DETAILED DESCRIPTION

[0023] In order to more easily understand the structure of the present application and the function characteristics and advantages that can be achieved, the preferred embodiments of the present application will be described in detail below, and the drawings will be described as follows:

[0024] Embodiment:

[0025] As shown in the drawings, the present application provides a pumped storage unit vibration monitoring system, specifically comprising: Figures 1 to 4

[0026] The mounting assembly 1 is used for placing the measured unit;

[0027] The induction assembly 2 is fixedly arranged on the mounting assembly 1, and a vibration sensor 21 is arranged thereon;

[0028] The damping base 3 is connected to the mounting assembly 1, and a double-layer damping structure is sequentially connected in the damping base 3 from top to bottom;

[0029] The alarm is arranged on the damping base 3 or an external device, and the alarm is electrically connected with the vibration sensor 21.

[0030] Referring to Figure 2 ​The mounting assembly 1 of the present application comprises a mounting plate 11 and a placing table 12 which is detachably fixed on the top of the mounting plate 11; the placing table 12 is provided with a support 13 on each side, and the top of the support 13 is provided with a notch, and the two notches cooperatively form an installation space for mounting and placing the machine group to be measured.

[0031] Referring to Figure 2 The mounting plate 11 of the present application is provided with a plurality of protruding portions 111 equidistantly along the peripheral direction, and the protruding portions 111 are each provided with a locking hole, and the damping base 3 is threadedly fixed to the bottom of the protruding portion 111 through the locking hole. Specifically, the protruding portions 111 are three, and the number of the damping bases 3 is also three and corresponds to the protruding portions 111 one by one, so as to increase the number of the damping bases 3 and improve the damping effect.

[0032] As another embodiment of the present application, as shown in Figure 4 The damping base 3 of the present application comprises a limiting pad 31 and a shell 32, the upper surface of the limiting pad 31 is provided with a positioning cylinder 33, one end of the shell 32 is inserted into the positioning cylinder 33, the other end of the shell 32 is threadedly connected with the locking hole, and the damping structure is arranged in the shell 32.

[0033] Referring to Figure 4 The two damping structures of the present application are connected through an inner screw rod 34, the top of the inner screw rod 34 penetrates through the shell 32 and is threadedly connected with the bolt. The damping structure comprises a spring 35 and a damping pad 36 connected below the spring 35, the spring 35 on the upper damping structure abuts against the inner wall on the top of the shell 32, and the spring 35 on the lower damping structure abuts against between the two damping pads 36.

[0034] Specifically, the outer surface of the damping pad 36 is coated with a waterproof and anticorrosive material, so that the damping pad 36 can be applied in harsh environments.

[0035] Specifically, the spring 35 is subjected to ED electroforming treatment and baking finish treatment, which improves the rustproof ability of the spring 35, and further, the spring 35 is subjected to heat treatment and stress relief treatment, which improves the fatigue resistance of the spring 35.

[0036] As another embodiment of the present application, the present application further comprises a control module, the control module comprises a signal receiver and a signal processing device, the signal receiver is used for receiving the signal of the vibration sensor 21 and transmitting the signal to the signal processing device, and the signal processing device is in communication connection with the alarm. By providing the control module, the control module receives the vibration signal and analyzes and processes the vibration signal, so as to determine whether to control the alarm to send an alarm signal.

[0037] Specifically, the alarm of the present application comprises a buzzer alarm and a wireless communicator, and the wireless communicator is used for sending a pre-warning signal to an external terminal device.

[0038] Further, the control module and the alarm are both prior art, which will not be described in detail.

[0039] As another embodiment of the present application, as shown in the figure, the induction assembly 2 of the present application comprises a dust cover 22, a magnet 23, a magnetic strip 24 and a mounting shell 25 which is detachably fixed on the mounting plate 11, the magnetic strip 24 is circumferentially arranged on the lower opening edge of the dust cover 22, the magnetic strip 24 and the magnet 23 are both fixed on the mounting shell 25, the magnet 23 is arranged in the dust cover 22, and the vibration sensor 21 is fixed on the top of the magnet 23. Figure 3

[0040] By arranging the dust cover 22, the monitoring interference of the dust on the vibration sensor 21 is effectively avoided, and the efficient and accurate use of the vibration sensor 21 is ensured; by arranging the magnet 23 and the magnetic strip 24, the installation stability of the dust cover 22 and the vibration sensor 21 is ensured, and the magnet 23 forms a firm connection between the vibration sensor 21 and the mounting shell 25, which is conducive to the accurate monitoring of the vibration of the mounting shell 25 by the vibration sensor 21, so as to monitor the vibration on the mounting plate 11, and further realize the vibration monitoring of the measured unit.

[0041] Specifically, the dust cover 22 is a hemispherical mesh cover shell. During the working process of the vibration sensor 21, the heat generated by the vibration sensor 21 can be dissipated in time through the dust cover 22, so as to maintain the excellent working environment of the vibration sensor 21 and improve the accuracy and service life.

[0042] Specifically, the magnet 23 is a neodymium-iron-boron strong magnet 23, and the magnetic strip 24 is a rubber soft magnetic strip.

[0043] Specifically, the vibration sensor 21 is preferably a magneto-integrated vibration transmitter, which is internally provided with a magneto vibration speed sensor, and converts the speed effective value or the integrated displacement peak-to-peak value into two-wire 4-20mA current output of the corresponding range through a high-precision transmission circuit, so as to facilitate remote display and control; and is very suitable for being connected to DCS, PLC and data acquisition system for long-term online vibration monitoring.

[0044] The above is only a preferred embodiment of the present application, and does not limit the present application in any form. Any person skilled in the art can make many possible changes and modifications to the technical solution of the present application without departing from the scope of the technical solution of the present application, or modify it into equivalent embodiments with equivalent changes. Therefore, any modification, equivalent change and modification made to the above embodiments according to the technical solution of the present application, which does not depart from the content of the technical solution of the present application, all belong to the protection scope of the technical solution.​

Claims

1. A pumped storage unit vibration monitoring system, characterized by, The utility model relates to a kind of machine group vibration testing device, including: Mounting assembly (1) for placing machine group to be tested; Induction assembly (2) is fixed on the mounting assembly (1), and vibration sensor (21) is arranged on it; Vibration damping base (3) is connected to the mounting assembly (1), and double-layer vibration damping structure is sequentially connected in it from top to bottom; Alarm, electrically connected with the vibration sensor (21).

2. The pumped storage unit vibration monitoring system of claim 1, wherein, The mounting assembly (1) includes mounting plate (11) and placing table (12), and the placing table (12) is detachably fixed on the top of the mounting plate (11). The placing table (12) is erected with a support (13) on both sides, and the top of the support (13) is provided with a notch. Two notches are matched to form an installation space for mounting and placing the machine group to be tested.

3. The pumped storage unit vibration monitoring system of claim 2, wherein, The mounting plate (11) is provided with a plurality of protrusions (111) at equal intervals along the peripheral direction, and a locking hole is formed in each of the protrusions (111). The vibration damping base (3) is screwed to the bottom of the protrusion (111) through the locking hole.

4. The pumped storage unit vibration monitoring system of claim 3, wherein, The vibration damping base (3) includes a limiting pad (31) and a shell (32). The upper surface of the limiting pad (31) is provided with a positioning cylinder (33), one end of the shell (32) is inserted into the positioning cylinder (33), and the other end of the shell (32) is connected with the locking hole through a bolt. The vibration damping structure is arranged in the shell (32).

5. The pumped storage unit vibration monitoring system of claim 4, wherein, Two vibration damping structures are connected by an inner screw (34). The top of the inner screw (34) penetrates the shell (32) and is connected with the bolt through a thread.

6. The pumped storage generating unit vibration monitoring system according to claim 5, characterized by, The vibration damping structure includes a spring (35) and a damping pad (36) connected below the spring (35). The spring (35) on the upper vibration damping structure abuts against the inner wall at the top of the shell (32), and the spring (35) on the lower vibration damping structure abuts against between two damping pads (36) respectively.

7. The pumped storage generating unit vibration monitoring system according to claim 2, characterized by, The induction assembly (2) includes a dust cover (22), a magnet (23), a magnetic strip (24), and a mounting shell (25) detachably fixed on the mounting plate (11). The magnetic strip (24) is arranged around the opening edge of the lower part of the dust cover (22). The magnetic strip (24) and the magnet (23) are fixed on the mounting shell (25). The magnet (23) is arranged in the dust cover (22), and the vibration sensor (21) is fixed on the top of the magnet (23).

8. The pumped storage generating unit vibration monitoring system according to claim 7, characterized by, The vibration sensor (21) is a magnetoelectric integrated vibration transmitter.

9. The pumped storage generating unit vibration monitoring system according to claim 8, characterized by, The alarm includes a buzzer alarm and a wireless communicator, and the wireless communicator is used to send a warning signal to an external terminal device.

10. The pumped storage generating unit vibration monitoring system of claim 8, wherein, The dust cover (22) is a hemispherical mesh cover shell.

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