Device for accurately controlling vibration of rotary hydraulic unit

Abstract

The utility model discloses a device and a method for accurately controlling the oscillation of a rotary hydraulic unit, which relate to the technical field of hydraulic equipment, and comprise a counterweight water tank, a water replenishing tank, a water collecting tank, a phase discrimination sensor and a vibration sensor, the water replenishing tank and the water collecting tank are arranged on the outer side of a main shaft of the hydraulic unit, and are respectively fixed on the upper end face and the lower end face of a rotor; the counterweight water tank is fixed to the periphery of the rotor, the water supplementing tank and the counterweight water tank are connected through a water supplementing pipe, the counterweight water tank and the water collecting tank are connected through a water releasing pipe, the water supplementing pipe is provided with two electromagnetic valves, the space between the electromagnetic valves forms an accurate liquid supplementing cavity, and the water releasing pipe is also provided with an electromagnetic valve. The phase discrimination sensor is installed on a main shaft of the hydraulic unit, and the vibration sensor is installed on a guide bearing of the hydraulic unit. The vibration balance device can be applied to an existing unit, is simple in structure and small in occupied space, guarantees the vibration balance efficiency, and also guarantees the balance accuracy and safety and the stability of the whole device.

Description

Technical Field

[0001] The utility model relates to the technical field of hydraulic equipment, in particular to a device for accurately controlling the oscillation of a rotary hydraulic unit. Background Art

[0002] The vibration and stability of hydraulic units have always been the key to affecting operational safety and unit life. Many power stations have experienced vibrations of varying degrees. In recent years, with the commissioning of high-head and large-capacity units, the units have become larger in size and lower in relative rigidity, and the vibration problem has become more prominent. Predicting and reducing the vibration problem of units is an important issue in the development of modern large-scale hydraulic units.

[0003] Vibration is an inevitable problem in the operation of large hydraulic machinery. The rotating parts of hydraulic machinery are unbalanced due to processing techniques such as cutting and welding. When the generator is installed, the geometric center is generally used for positioning. There is a deviation between the actual geometric center and the magnetic center. The rotor rotation center does not coincide with the axis. Under the action of alternating magnetic pull and centripetal inertia force generated by unbalanced mass, unbalanced axial and radial vibrations, the shaft will spin in a bow shape.

[0004] The existing method of reducing the vibration of hydraulic units generally controls vibration through prediction and optimization design, which can only reduce the vibration under one or several operating conditions, but cannot reduce the vibration in the full range of operating conditions of the actual operation of the unit.

[0005] The Chinese patent document with publication number CN102768101A and publication date November 7, 2012 discloses a vibration test device for a hydraulic unit of a hydropower station and a vibration reduction implementation method thereof, comprising a horizontal vibration sensor, a magnetic proximity switch, a magnetic sheet type fixed reference point and a signal acquisition instrument, wherein four horizontal vibration sensors are respectively fixed on two legs of an upper frame and a lower frame, the magnetic proximity switch is fixed on the upper frame, the magnetic sheet type fixed reference point is fixed on the rotating shaft, and the horizontal vibration sensor and the magnetic proximity switch are respectively connected to the signal acquisition instrument; the vibration reduction implementation method thereof is: starting the hydraulic unit to test the sensor signal of the hydraulic unit under different loads, determining the position of the unbalanced mass according to the test curve, performing equal mass counterweighting on the upper and lower end faces of the unit rotor, and changing the counterweight mass test in equal proportion, and determining the counterweight of the upper and lower end faces of the hydraulic unit rotor according to the vibration test amplitude of the two counterweightings. The advantages of the invention are: the test device has a simple structure, the vibration reduction method thereof is easy to implement, and the vibration of the hydraulic unit caused by mechanical, water flow and electromagnetic unbalanced forces can be simultaneously reduced, and the service life can be extended.

[0006] However, the technical solution with the publication number CN102768101A, on the one hand, requires repeated welding, installation or removal of the counterweight block when performing the counterweight, which brings a lot of insecurity to the workers during the operation process. On the other hand, this technical solution requires the unit to be shut down for each balancing, which greatly reduces the working efficiency of the hydraulic unit.

[0007] A Chinese patent document with publication number CN117268631A and publication date December 22, 2023 discloses a liquid-type rotor online dynamic balancing device and dynamic balancing method, the device comprising a central liquid storage chamber, a balancing liquid storage chamber, a fluid switch, a pipeline and a wireless sensor, the central liquid storage chamber is fixed on the rotor and pre-stored with liquid; the balancing liquid storage chamber is evenly distributed along the circumference of the rotor end face and fixed on the rotor end face. When the invention is working, the centrifugal force generated by the rotation of the rotor transfers the liquid from the central liquid storage chamber to the balancing liquid storage chamber, and no additional equipment such as an injection pump is required to achieve injection. During installation and maintenance, there is no need to consider additional liquid systems, which reduces the corresponding costs. The wireless sensor fixed on the rotor of the invention rotates synchronously with the rotor, collects the vibration signal of the rotor in real time, and avoids the problem that the vibration of the bearing seat and the vibration of the rotor are not synchronized, resulting in the inability to reflect the actual balance of the rotor. The invention can be used for the balancing transformation of rotor systems without online balancing devices.

[0008] However, the technical solution of the above publication number CN117268631A has the following disadvantages:

[0009] 1. This technical solution cannot accurately control the mass of liquid required for balance. Instead, it slowly finds the unbalanced position through trial and error and then gradually increases the final balanced vibration of the liquid. This takes too long and the balancing efficiency is too low.

[0010] 2. In this technical solution, the liquid cannot flow out of the balancing liquid storage chamber after reaching it. When the balancing liquid storage chamber is full or the counterweight is misplaced, the machine needs to be shut down before the liquid can flow back to the water tank at the center by gravity. The balancing efficiency is low and the efficiency of the hydraulic unit is reduced. Frequent start-up and shutdown of the unit also reduces the service life of the unit. Utility Model Content

[0011] In order to solve the above technical problems, the utility model proposes a device and method for accurately controlling the oscillation of a rotary hydraulic unit, which can be applied to existing units, has a simple and compact structure, occupies very little space, and can monitor the oscillation frequency of the unit in real time, accurately control the flow direction and amount of the counterweight liquid, thereby changing the mass of the unbalanced body, changing the eccentric position of the rotor, and offsetting the lateral vibration response of the shaft caused by rotor mass imbalance, electromagnetic force imbalance, hydraulic imbalance, etc., so as to completely eliminate the hydraulic mechanical rotation frequency vibration during the operation of the unit.

[0012] The utility model is realized by adopting the following technical solutions:

[0013] A device for accurately controlling the oscillation of a rotary hydraulic unit, comprising a counterweight water tank, a water supply tank, a water collection tank, a phase sensor, and a vibration sensor. The counterweight water tanks are four and are evenly distributed around the rotor. The water supply tank and the water collection tank are arranged outside the main shaft of the hydraulic unit and are symmetrical with the main shaft as the center. The water supply tank is fixed to the upper end face of the rotor, and the water collection tank is fixed to the lower end face of the rotor. The water supply tank and the water collection tank are connected by a circulation pipe. The counterweight water tanks are evenly distributed and fixed around the rotor. The water supply tank and the counterweight water tank are connected by a supply pipe. The counterweight water tank and the water collecting tank are connected by a water release pipe, a remote control solenoid valve 1 is arranged at one end of the water supply pipe near the water supply tank, a remote control solenoid valve 2 is arranged between the remote control solenoid valve 1 and the counterweight water tank, the water supply pipe area intercepted by the remote control solenoid valve 1 and the remote control solenoid valve 2 is a precise liquid supply chamber, a remote control solenoid valve 3 is arranged on the water release pipe, a circulating water pump is arranged in the circulating pipe, the phase detection sensor is installed on the main shaft for real-time monitoring of the phase of the rotational frequency vibration signal, and the vibration sensor is installed on the guide bearing for real-time monitoring of the radial vibration displacement of the rotor.

[0014] The water supply tank and the water collecting tank are both provided with a first wave suppression plate, and the counterweight water tank is provided with a second wave suppression plate.

[0015] The first wave suppression plates are evenly distributed around the rotor, and the second wave suppression plates are arranged at intervals in the counterweight water tank.

[0016] The counterweight water tank is provided with a closable exhaust hole which can be connected to an exhaust pipe.

[0017] A one-way ventilation device is arranged on the water supply pipe wall between the remote control solenoid valve 1 and the remote control solenoid valve 2.

[0018] The outer walls of the water supply tank and the water collecting tank are provided with a heat insulation layer to reduce the influence of the ambient temperature on the liquid in the tank and ensure the stability of the viscosity and fluidity of the liquid.

[0019] The surfaces of the wave suppression plate 1 and the wave suppression plate 2 are wavy.

[0020] The surfaces of the first wave suppression plate and the second wave suppression plate are also coated with a layer of anti-corrosion paint.

[0021] The circulation pipe is also provided with a detachable filter.

[0022] The water supply tank, water collecting tank and counterweight water tank are all made of corrosion-resistant materials.

[0023] Compared with the prior art, the advantages of the utility model are:

[0024] 1. The utility model provides an automatic swing adjustment device for a hydraulic unit, which replaces the complicated test weight installation welding and removal process in the previous dynamic balance test of the hydraulic unit. By adopting hydraulic counterweight, the insecurity caused by welding the test weight is avoided. At the same time, by setting the remote control solenoid valve 1 and the remote control solenoid valve 2 on the water supply pipe, a precise liquid supply chamber is formed between them, which ensures the precise regulation of the counterweight liquid. The valve opening and closing is controlled by remote control. Combined with the centrifugal force caused by the rotation of the rotor and the gravity of the liquid, the counterweight liquid flows from the water supply tank to the counterweight water tank by itself after being adjusted by the valve, and the unit does not need The oscillation can be balanced and adjusted when the unit is shut down, which reduces the unit's downtime and improves work efficiency. At the same time, the water supply tank and the water collecting tank of the utility model are specifically fixed on the upper and lower end surfaces of the rotor respectively, and are connected by a circulation pipe, which ensures the circulation of the entire hydraulic balancing process, so that the balancing liquid can be recycled and the balancing work can be completed uninterruptedly. At the same time, the water supply tank and the water collecting tank are symmetrical with the main axis as the center, and the number of remote control solenoid valves in the four directions of the water supply pipe, the water release pipe, and the balancing water tank are exactly the same, so that when the device is applied to the rotor, the imbalance caused by the device can be minimized.

[0025] 2. The utility model can completely eliminate the rotational frequency vibration by dynamically adjusting the orientation of the unbalanced mass of the rotor and utilizing the vibration caused by the unbalanced mass to reversely offset the rotational frequency vibration caused by hydraulic force, electromagnetic force and unbalanced mass during the actual operation of the unit.

[0026] 3. In the utility model, wave suppression plates are arranged in the water supply tank, water collecting tank and counterweight water tank, which decompose the impact force of the liquid sloshing in the tank into multiple smaller impact forces, slow down the wave effect in the tank and improve the stability of the overall device; and the surface is wavy, which can increase the surface area and improve the contact between the liquid and the wave suppression plate, thereby more effectively reducing the liquid sloshing; the surface of the wave suppression plate is also coated with a layer of anti-corrosion paint, which can enhance its corrosion resistance, anti-pollution and other properties and increase its service life.

[0027] 4. The utility model is provided with a closable exhaust hole that can be connected to the exhaust pipe on the counterweight water tank, and a one-way ventilation device is provided on the water supply pipe wall between the remote control solenoid valve 1 and the remote control solenoid valve 2, so as to ensure the stability of the internal air pressure and prevent the counterweight liquid from being unable to flow out normally due to the generation of negative pressure in the internal space.

[0028] 5. In the utility model, the outer walls of the water supply tank and the water collecting tank are provided with a heat insulating layer, which can reduce the influence of the ambient temperature on the liquid in the tank and ensure the stability of the viscosity and fluidity of the liquid.

[0029] 6. In the utility model, a detachable filter is also provided on the circulation pipe, which can prevent impurities, particles or sediments in the circulation pipe from entering the circulation water pump or other key components, thereby extending their service life and reducing maintenance requirements.

[0030] 7. The utility model does not require any preconditions and can dynamically iterate and reduce the vibration of the unit according to the vibration state of the real-time operating conditions, thereby eliminating the rotational frequency vibration under any operating conditions.

[0031] 8. The utility model can identify the balancing water tank that needs to be supplemented with balancing liquid by analyzing the vibration signal, and can accurately control the balancing liquid through the precise liquid replenishing chamber by applying hydraulic balancing weight in the opposite direction of the unbalanced mass, and perform precise adjustment. In addition, droop control is added during the water tank weight adjustment process, and dynamic adjustment is performed according to the real-time change amount and change rate of the vibration amplitude, so that the water balancing weight is more in line with the actual operating conditions and the control delay effect is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific implementations, wherein:

[0033] Figure 1 It is a cross-sectional view of the device of the utility model after installation;

[0034] Figure 2 It is a schematic diagram of the device of the utility model;

[0035] Figure 3 This is a schematic diagram of the counterweight water tank of the utility model;

[0036] Figure 4 This is a schematic diagram of the interior of the water supply tank and water collection tank of the utility model;

[0037] Figure 5 , Figure 6 It is a schematic diagram of the principle of the present invention.

[0038] Markings in the figure:

[0039] 1. Water supply tank, 2. Counterweight water tank, 3. Rotor, 4. Main shaft, 5. Water supply pipe, 6. Water release pipe, 7. Water collecting tank, 8. Remote control solenoid valve 1, 9. Remote control solenoid valve 2, 10. Suppression plate 1, 11. Suppression plate 2, 12. Remote control solenoid valve 3, 13. Circulation pipe. DETAILED DESCRIPTION

[0040] Example 1

[0041] This embodiment is the most basic implementation method, a device for accurately controlling the oscillation of a rotary hydraulic unit, including a counterweight water tank 2, a water supply tank 1, a water collecting tank 7, a phase sensor, and a vibration sensor. The counterweight water tank 2 is four and evenly distributed around the rotor 3. The water supply tank 1 and the water collecting tank 7 are arranged outside the main shaft 4 of the hydraulic unit and the water supply tank 1 and the water collecting tank 7 are symmetrical with the main shaft 4 as the center. The water supply tank 1 is fixed to the upper end surface of the rotor 3, and the water collecting tank 7 is fixed to the lower end surface of the rotor 3. The water supply tank 1 and the water collecting tank 7 are connected by a circulation pipe 13. The counterweight water tank 2 is evenly distributed and fixed around the rotor 3. The water supply tank 1 and the counterweight water tank 2 are connected by a circulation pipe 13. The counterweight water tank 2 and the water collecting tank 7 are connected through a water release pipe 6. The water supply pipe 5 is provided with a remote control solenoid valve 1 8 at one end near the water supply tank 1, and a remote control solenoid valve 2 9 is provided between the remote control solenoid valve 1 8 and the counterweight water tank 2. The water supply pipe area cut by the remote control solenoid valve 1 8 and the remote control solenoid valve 2 9 is a precise liquid replenishment chamber, and the volume of the precise liquid replenishment chamber is set according to the counterweight accuracy requirement. The water release pipe 6 is provided with a remote control solenoid valve 3 12, and a circulating water pump is provided in the circulating pipe 13. The phase detection sensor is installed on the main shaft 4 to monitor the phase of the rotational frequency vibration signal in real time. The vibration sensor is installed on the guide bearing to monitor the radial vibration displacement of the rotor 3 in real time.

[0042] The utility model provides a device for accurately controlling the oscillation of a rotary hydraulic unit, and provides a device for automatically adjusting the oscillation of a hydraulic unit, which replaces the complicated test weight installation welding and removal process in the previous dynamic balance test of the hydraulic unit, and avoids the insecurity caused by the welding test weight by adopting hydraulic counterweight. At the same time, by setting the remote control solenoid valve 1 and the remote control solenoid valve 2 on the water supply pipe, a precise liquid supply chamber is formed therebetween, and the precise regulation of the counterweight liquid is ensured. The valve opening and closing is controlled by remote control. Combined with the centrifugal force caused by the rotation of the rotor and the gravity of the liquid, the counterweight liquid flows from the water supply tank to the counterweight after being adjusted by the valve. Water tank, the unit does not need to stop to balance the vibration, which reduces the unit downtime and improves work efficiency; at the same time, the water supply tank and the water collecting tank of the utility model are specifically fixed on the upper and lower end surfaces of the rotor respectively, and are connected by a circulation pipe, which ensures the circulation of the entire hydraulic balancing process, so that the balancing liquid can be recycled and the balancing work can be completed uninterruptedly; at the same time, the water supply tank 1 and the water collecting tank 7 are symmetrical with the main axis as the center, and the number of remote control solenoid valves in the four directions of the water supply pipe 5, the water release pipe 6, and the balancing water tank 2 are exactly the same, so that when the device is applied to the rotor, the imbalance caused by the device can be minimized.

[0043] Example 2

[0044] The present embodiment is a preferred implementation method, a device for accurately controlling the oscillation of a rotary hydraulic unit, comprising a counterweight water tank 2, a water supply tank 1, a water collecting tank 7, a phase sensor, and a vibration sensor. The counterweight water tank 2 is four and evenly distributed around the rotor 3. The water supply tank 1 and the water collecting tank 7 are arranged outside the main shaft 4 of the hydraulic unit and the water supply tank 1 and the water collecting tank 7 are symmetrical with the main shaft 4 as the center. The water supply tank 1 is fixed to the upper end surface of the rotor 3, and the water collecting tank 7 is fixed to the lower end surface of the rotor 3. The water supply tank 1 and the water collecting tank 7 are connected by a circulation pipe 13. The counterweight water tank 2 is evenly distributed and fixed around the rotor 3. The water supply tank 1 and the counterweight water tank 2 are connected by a water supply pipe 5. The counterweight water tank 2 and the water collecting tank 7 are connected by a water release pipe 6. The water supply pipe 5 is near the supply pipe 13. A remote control solenoid valve 1 8 is provided at one end of the water tank 1, and a remote control solenoid valve 2 9 is provided between the remote control solenoid valve 1 8 and the counterweight water tank 2. The water supply pipe area intercepted by the remote control solenoid valve 1 8 and the remote control solenoid valve 2 9 is a precise liquid supply chamber, and the volume of the precise liquid supply chamber is set according to the counterweight accuracy requirement. A remote control solenoid valve 3 12 is provided on the water release pipe 6, and a circulating water pump is provided in the circulation pipe 13. The phase detection sensor is installed on the main shaft 4 to monitor the phase of the rotation frequency vibration signal in real time. The vibration sensor is installed on the guide bearing to monitor the radial vibration displacement of the rotor 3 in real time. The counterweight water tank 2, water supply pipe 5, water release pipe 6 and remote control solenoid valve in each direction are completely consistent. The water supply pipe 5, water release pipe 6 and circulation pipe 13 are flexible hoses or steel pipes. Flexible pipes are preferably used when the internal space of the rotor 3 is complex and narrow.

[0045] Furthermore, the water supply tank 1 and the water collection tank 7 are both provided with a wave suppression plate 10, the counterweight water tank 2 is provided with a wave suppression plate 2 11, the wave suppression plates 10 are evenly distributed around the rotor 3, and the wave suppression plates 2 11 are arranged at intervals in the counterweight water tank 2. By providing the wave suppression plates, the impact force of the sloshing of the liquid in the tank is decomposed into multiple smaller impact forces, which reduces the wave effect in the tank and improves the stability of the overall device.

[0046] Furthermore, the counterweight water tank 2 is provided with a closable exhaust hole that can be connected to an exhaust pipe; further, the wall of the water supply pipe 5 between the remote control solenoid valve 1 8 and the remote control solenoid valve 2 9 is provided with a one-way ventilation device to ensure the stability of the internal air pressure and prevent the internal space from generating negative pressure so that the counterweight liquid cannot flow out normally.

[0047] Example 3

[0048] The present embodiment is the best implementation mode, which is a device for accurately controlling the oscillation of a rotary hydraulic unit, including a counterweight water tank 2, a water supply tank 1, a water collecting tank 7, a phase sensor, and a vibration sensor. The counterweight water tank 2 is four and evenly distributed around the rotor 3. The water supply tank 1 and the water collecting tank 7 are arranged outside the main shaft 4 of the hydraulic unit and the water supply tank 1 and the water collecting tank 7 are symmetrical with the main shaft 4 as the center. The water supply tank 1 is fixed to the upper end surface of the rotor 3, and the water collecting tank 7 is fixed to the lower end surface of the rotor 3. The water supply tank 1 and the water collecting tank 7 are connected by a circulation pipe 13. The counterweight water tank 2 is evenly distributed and fixed around the rotor 3. The water supply tank 1 and the counterweight water tank 2 are connected by a water supply pipe 5. The counterweight water tank 2 and the water collecting tank 7 are connected by a water release pipe 6. The water supply pipe 5 is near the supply pipe 13. A remote control solenoid valve 1 8 is provided at one end of the water tank 1, and a remote control solenoid valve 2 9 is provided between the remote control solenoid valve 1 8 and the counterweight water tank 2. The water supply pipe area intercepted by the remote control solenoid valve 1 8 and the remote control solenoid valve 2 9 is a precise liquid supply chamber, and the volume of the precise liquid supply chamber is set according to the counterweight accuracy requirement. A remote control solenoid valve 3 12 is provided on the water release pipe 6, and a circulating water pump is provided in the circulation pipe 13. The phase detection sensor is installed on the main shaft 4 to monitor the phase of the rotation frequency vibration signal in real time. The vibration sensor is installed on the guide bearing to monitor the radial vibration displacement of the rotor 3 in real time. The counterweight water tank 2, water supply pipe 5, water release pipe 6 and remote control solenoid valve in each direction are completely consistent. The water supply pipe 5, water release pipe 6 and circulation pipe 13 are flexible hoses or steel pipes. Flexible pipes are preferably used when the internal space of the rotor 3 is complex and narrow.

[0049] Furthermore, the water supply tank 1 and the water collection tank 7 are both provided with a wave suppression plate 10, the counterweight water tank 2 is provided with a wave suppression plate 2 11, the wave suppression plates 10 are evenly distributed around the rotor 3, and the wave suppression plates 2 11 are arranged at intervals in the counterweight water tank 2. By providing the wave suppression plates, the impact force of the sloshing of the liquid in the tank is decomposed into multiple smaller impact forces, which reduces the wave effect in the tank and improves the stability of the overall device.

[0050] Furthermore, the counterweight water tank 2 is provided with a closable exhaust hole that can be connected to an exhaust pipe; further, the wall of the water supply pipe 5 between the remote control solenoid valve 1 8 and the remote control solenoid valve 2 9 is provided with a one-way ventilation device to ensure the stability of the internal air pressure and prevent the internal space from generating negative pressure so that the counterweight liquid cannot flow out normally.

[0051] Furthermore, the outer walls of the water replenishment tank 1 and the water collecting tank 7 are provided with a heat insulation layer to reduce the influence of the ambient temperature on the liquid in the tank and ensure the stability of the viscosity and fluidity of the liquid.

[0052] Furthermore, the surfaces of the wave suppression plate 10 and the wave suppression plate 2 11 are wavy, which can increase the surface area and improve the contact between the liquid and the wave suppression plates, thereby more effectively reducing the shaking of the liquid.

[0053] Furthermore, the surfaces of the wave suppression plate 1 10 and the wave suppression plate 2 11 are also coated with a layer of anti-corrosion coating, which can enhance their corrosion resistance, anti-pollution and other properties, and improve their service life and effect.

[0054] Furthermore, a detachable filter is provided on the circulation pipe 13 to prevent impurities, particles or sediments in the circulation pipe 13 from entering the circulation water pump or other key components, thereby extending their service life and reducing maintenance requirements.

[0055] The working principle of the utility model is as follows:

[0056] The vibration state is obtained in real time through the phase-comparison sensor set on the main shaft and the radial vibration set on the guide bearing bracket, and the vibration signal is fed back to the monitoring terminal. The monitoring terminal adjusts the remote control solenoid valve according to the real-time monitored vibration state, controls the amount of water supplied from the water supply tank to the counterweight water tank, and flows from the water supply tank to the counterweight water tank after adjustment by the remote control solenoid valve 1 and the remote control solenoid valve 2 according to the required amount of counterweight liquid obtained by analysis. The water volume in the counterweight water tank is regulated by the remote control solenoid valve, which changes the unbalanced mass orientation of the rotor, and offsets the rotor rotation frequency vibration with the unbalanced mass vibration. During the counterweight period, the counterweight liquid can flow to the water collection tank through the remote control solenoid valve 3, and then return to the water supply tank through the circulation pipe to complete the cycle. By continuously and dynamically adjusting the mass of the counterweight water tank, the purpose of completely reducing the rotor rotation frequency vibration is achieved.

[0057] The utility model provides a device and method for accurately controlling the oscillation of a rotary hydraulic unit, which can be applied to existing units, has a simple and compact structure, occupies very little space, ensures balancing efficiency, and also ensures balancing accuracy, safety and stability of the overall device.

Claims

1. A device for accurately controlling the oscillation of a rotary hydraulic unit, comprising a counterweight water tank (2), a water supply tank (1), a water collecting tank (7), a phase detector sensor, and a vibration sensor, wherein the counterweight water tank (2) is four, and the device is characterized in that: The water supply tank (1) and the water collecting tank (7) are arranged outside the main shaft (4) of the hydraulic unit and are centrally symmetrical with the main shaft (4) as the center. The water supply tank (1) is fixed to the upper end surface of the rotor (3), and the water collecting tank (7) is fixed to the lower end surface of the rotor (3). The water supply tank (1) and the water collecting tank (7) are connected via a circulation pipe (13). The counterweight water tank (2) is evenly distributed and fixed around the rotor (3). The water supply tank (1) and the counterweight water tank (2) are connected via a water supply pipe (5). The counterweight water tank (2) and the water collecting tank (7) are connected via a water release pipe (6). The water supply pipe (5) is provided with a remote control solenoid valve 1 (8) at one end close to the water supply tank (1), and a remote control solenoid valve 2 (9) is provided between the remote control solenoid valve 1 (8) and the counterweight water tank (2). The area of ​​the water supply pipe (5) cut by the remote control solenoid valve 1 (8) and the remote control solenoid valve 2 (9) is a precise liquid supply cavity. The water release pipe (6) is provided with a remote control solenoid valve 3 (12). A circulating water pump is provided in the circulating pipe (13). The phase detector sensor is installed on the main shaft (4) for real-time monitoring of the phase of the rotation frequency vibration signal. The vibration sensor is installed on the guide bearing for real-time monitoring of the radial vibration displacement of the rotor (3).

2. The device for accurately controlling the oscillation of a rotary hydraulic unit according to claim 1, characterized in that: The water supply tank (1) and the water collection tank (7) are both provided with a plurality of wave suppression plates (10), and the counterweight water tank (2) is provided with a plurality of wave suppression plates (11). The wave suppression plates (10) and (11) decompose the impact force of the sloshing of the liquid in the tank into a plurality of smaller impact forces, thereby alleviating the wave effect in the tank and improving the stability of the overall device.

3. The device for accurately controlling the oscillation of a rotary hydraulic unit according to claim 2, characterized in that: The first wave suppression plate (10) is evenly distributed around the rotor (3), and the second wave suppression plate (11) is arranged at intervals in the counterweight water tank (2).

4. The device for accurately controlling the oscillation of a rotary hydraulic unit according to claim 3, characterized in that: The counterweight water tank (2) is provided with a closable exhaust hole.

5. The device for accurately controlling the oscillation of a rotary hydraulic unit according to claim 1, characterized in that: A one-way ventilation device is provided on the wall of the water supply pipe (5) between the remote control solenoid valve 1 (8) and the remote control solenoid valve 2 (9).

6. The device for accurately controlling the oscillation of a rotary hydraulic unit according to claim 1, characterized in that: The outer walls of the water replenishment tank (1) and the water collection tank (7) are provided with a heat insulation layer, which is used to reduce the influence of the ambient temperature on the liquid in the tank and ensure the stability of the viscosity and fluidity of the liquid.

7. The device for accurately controlling the oscillation of a rotary hydraulic unit according to claim 3, characterized in that: The surfaces of the wave suppression plate 1 (10) and the wave suppression plate 2 (11) are wavy.

8. The device for accurately controlling the oscillation of a rotary hydraulic unit according to claim 7, characterized in that: The surfaces of the first wave suppression plate (10) and the second wave suppression plate (11) are also coated with a layer of anti-corrosion coating.

9. The device for accurately controlling the oscillation of a rotary hydraulic unit according to claim 1, characterized in that: The circulation pipe (13) is also provided with a detachable filter.

10. The device for accurately controlling the oscillation of a rotary hydraulic unit according to claim 1, characterized in that: The water supply tank (1), the water collecting tank (7) and the counterweight water tank (2) are all made of corrosion-resistant materials.

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