CN205370659U - Hydraulic pressure governing system that steam turbine was used - Google Patents
Hydraulic pressure governing system that steam turbine was used Download PDFInfo
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- CN205370659U CN205370659U CN201620100420.1U CN201620100420U CN205370659U CN 205370659 U CN205370659 U CN 205370659U CN 201620100420 U CN201620100420 U CN 201620100420U CN 205370659 U CN205370659 U CN 205370659U
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- 230000001105 regulatory effect Effects 0.000 claims abstract description 18
- 239000003921 oil Substances 0.000 claims description 264
- 239000010720 hydraulic oil Substances 0.000 claims description 21
- 238000006073 displacement reaction Methods 0.000 claims description 15
- 238000012423 maintenance Methods 0.000 abstract description 5
- 230000033228 biological regulation Effects 0.000 abstract description 3
- 238000005265 energy consumption Methods 0.000 abstract description 3
- 239000010729 system oil Substances 0.000 description 13
- 230000000875 corresponding effect Effects 0.000 description 4
- 239000012535 impurity Substances 0.000 description 3
- 230000001276 controlling effect Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000000295 fuel oil Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
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- 229910001220 stainless steel Inorganic materials 0.000 description 1
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Abstract
本实用新型涉及汽轮机的调节系统，尤其涉及一种汽轮机对进行电液调节用的液压系统。为解决现有的汽轮机的液压调节系统能量消耗大、响应速度慢及工作效率低的问题，本实用新型提出一种汽轮机用的液压调节系统，包括油源系统和伺服油动机；油源系统包括蓄能器、回油管路和至少两条供油液压回路，供油液压回路与蓄能器连接，定量齿轮泵在伺服电机的驱动下向蓄能器充油；回油管路与蓄能器连接并设置有回油开关阀；伺服油动机包括由伺服阀、电磁阀、第一卸荷阀和第二卸荷阀组成的伺服机构及油缸；油缸上设置有检测油缸的活塞的位移量的位移传感器。本实用新型汽轮机用的液压调节系统响应迅速、能耗低、工作效率高，检修方便。
The utility model relates to a regulating system of a steam turbine, in particular to a hydraulic system for electro-hydraulic regulation of a pair of steam turbines. In order to solve the problems of large energy consumption, slow response speed and low work efficiency of the existing steam turbine hydraulic adjustment system, the utility model proposes a hydraulic adjustment system for steam turbines, including an oil source system and a servo oil motor; the oil source system includes An accumulator, an oil return pipeline and at least two oil supply hydraulic circuits, the oil supply hydraulic circuit is connected to the accumulator, and the quantitative gear pump is driven by the servo motor to charge the accumulator with oil; the oil return pipeline is connected to the accumulator It is also equipped with an oil return switch valve; the servo oil motor includes a servo mechanism and an oil cylinder composed of a servo valve, a solenoid valve, a first unloading valve and a second unloading valve; sensor. The utility model has the advantages of quick response, low energy consumption, high working efficiency and convenient maintenance of the hydraulic regulating system for the steam turbine.
Description
技术领域technical field
本实用新型涉及汽轮机的调节系统，尤其涉及一种对汽轮机进行电液调节用的液压系统。The utility model relates to a regulating system of a steam turbine, in particular to a hydraulic system for electro-hydraulic regulation of the steam turbine.
背景技术Background technique
目前，在现有的汽轮机的液压调节系统中，油源部分主要是采用普通的三相电机配合恒压变量泵输出压力对汽轮机进行调节。这种液压调节系统在进行工作时，消耗的能源有大约30-40％是因转换成热量而被浪费的，比如一台300MW的汽轮机组常规配套的抗燃油液压调节系统的油源部分一般采用两台普通的30千瓦(KW)的三相异步电动机，每一台三相异步电动机驱动一台排量约80毫升/转的恒压变量泵所消耗的电能为30千瓦时(KWH)，能量消耗大，且三相异步电动机在断电后还会因自身的惯性而继续转动一段时间后才能停下，进而导致液压调节系统的响应速度慢，工作效率低。此外，该种液压调节系统所采用的恒压变量泵的采购成本较高，且系统检修维护较为麻烦。At present, in the existing steam turbine hydraulic regulation system, the oil source part mainly uses a common three-phase motor and a constant pressure variable pump output pressure to regulate the steam turbine. When this hydraulic regulating system is working, about 30-40% of the energy consumed is wasted due to conversion into heat. Two ordinary 30 kilowatt (KW) three-phase asynchronous motors, each three-phase asynchronous motor drives a constant pressure variable pump with a displacement of about 80 ml/rev consumes 30 kilowatt-hours (KWH), energy The consumption is large, and the three-phase asynchronous motor will continue to rotate for a period of time due to its own inertia after power failure, which leads to slow response speed and low work efficiency of the hydraulic adjustment system. In addition, the purchase cost of the constant pressure variable pump used in this hydraulic adjustment system is relatively high, and the maintenance of the system is troublesome.
实用新型内容Utility model content
为解决现有的汽轮机的液压调节系统能量消耗大、响应速度慢及工作效率低的问题，本实用新型提出一种汽轮机用的液压调节系统，该液压调节系统包括油源系统和伺服油动机；所述油源系统包括蓄能器、回油管路和至少两条供油液压回路，所述供油液压回路与所述蓄能器连接，所述供油液压回路中定量齿轮泵在伺服电机的驱动下从油箱中吸入液压油并充入到所述蓄能器中，且在所述定量齿轮泵与所述蓄能器之间设置有供油开关阀；所述回油管路与所述蓄能器连接，且该回油管路上设置有回油开关阀；In order to solve the problems of large energy consumption, slow response speed and low work efficiency of the existing steam turbine hydraulic control system, the utility model proposes a hydraulic control system for steam turbines, the hydraulic control system includes an oil source system and a servo oil motor; The oil source system includes an accumulator, an oil return pipeline and at least two oil supply hydraulic circuits, the oil supply hydraulic circuit is connected to the accumulator, and the quantitative gear pump in the oil supply hydraulic circuit Driven to suck hydraulic oil from the oil tank and charge it into the accumulator, and an oil supply switch valve is arranged between the quantitative gear pump and the accumulator; the oil return line and the accumulator The energy device is connected, and the oil return switch valve is set on the oil return line;
所述伺服油动机包括伺服机构和油缸，且所述伺服机构包括伺服阀、电磁阀、第一卸荷阀和第二卸荷阀；所述伺服阀的进油口与所述供油液压回路连接，所述伺服阀的出油口与所述回油管路连接，且所述伺服阀的第一控制油口与所述油缸的上腔口连接，所述伺服阀的第二控制油口与所述油缸的下腔口连接；所述电磁阀的进油口与所述供油液压回路连接，所述电磁阀的出油口与所述回油管路连接，且所述电磁阀的控制油口通过所述第一卸荷阀与所述油缸的上腔口连接，所述电磁阀的控制油口通过所述第二卸荷阀与所述油缸的下腔口连接；所述油缸上设置有检测油缸活塞的位移量的位移传感器。The servo oil motor includes a servo mechanism and an oil cylinder, and the servo mechanism includes a servo valve, a solenoid valve, a first unloading valve and a second unloading valve; the oil inlet of the servo valve is connected to the oil supply hydraulic circuit connected, the oil outlet of the servo valve is connected with the oil return line, and the first control oil port of the servo valve is connected with the upper cavity port of the oil cylinder, and the second control oil port of the servo valve is connected with the The lower cavity port of the oil cylinder is connected; the oil inlet of the solenoid valve is connected with the oil supply hydraulic circuit, the oil outlet of the solenoid valve is connected with the oil return pipeline, and the control oil of the solenoid valve The port is connected with the upper chamber port of the oil cylinder through the first unloading valve, and the control oil port of the solenoid valve is connected with the lower chamber port of the oil cylinder through the second unloading valve; There is a displacement sensor that detects the displacement of the cylinder piston.
汽轮机用的液压调节系统中的油源系统采用伺服电机和定量齿轮泵配合，系统响应时间只有30毫秒左右，响应迅速，工作效率高；伺服油动机采用伺服阀和与卸荷阀配合的电磁阀对油缸进行控制，可使油缸活塞快速下行或快速上行，从而在汽轮机或汽轮机组出现故障时，使汽轮机或汽轮机组能够快速关闭。另外，油源系统中设置有至少两条供油液压回路，形成供油液压回路的冗余设置，当工作组的供油液压回路出现故障或进行检修时，可开启备用组的供油液压回路为液压调节系统供油，既方便维修人员对工作组供油液压回路进行维修或检修，又不影响液压调节系统的使用，为液压调节系统的运行提供了可靠的保障。The oil source system in the hydraulic regulating system for steam turbines uses a servo motor and a quantitative gear pump. The system response time is only about 30 milliseconds, and the response is fast and the work efficiency is high. The servo oil motor uses a servo valve and a solenoid valve that cooperates with the unloading valve. Controlling the oil cylinder can make the piston of the oil cylinder go down or up quickly, so that when the steam turbine or the steam turbine unit fails, the steam turbine or the steam turbine unit can be shut down quickly. In addition, at least two oil supply hydraulic circuits are set in the oil source system to form a redundant setting of the oil supply hydraulic circuit. When the oil supply hydraulic circuit of the working group fails or is overhauled, the oil supply hydraulic circuit of the standby group can be opened Supplying oil to the hydraulic adjustment system is convenient for maintenance personnel to repair or overhaul the oil supply hydraulic circuit of the working group without affecting the use of the hydraulic adjustment system, providing a reliable guarantee for the operation of the hydraulic adjustment system.
优选地，所述油源系统与所述伺服油动机相互独立设置，方便安装，且当油源系统或伺服油动机出现故障时，方便检修或更换相应部件。Preferably, the oil source system and the servo oil motor are set independently of each other, which is convenient for installation, and when the oil source system or the servo oil motor fails, it is convenient for maintenance or replacement of corresponding components.
优选地，所述定量齿轮泵的出油口处依次设置有单路保护单向阀和高压滤油器。其中，单路保护单向阀用于避免供油液压回路中的液压油在供油开关阀关闭后回流到定量齿轮泵中；高压滤油器用于对定量齿轮泵输出的液压油作进一步的过滤，从而为液压调节系统提供清洁的液压油。Preferably, a one-way protection check valve and a high-pressure oil filter are sequentially arranged at the oil outlet of the quantitative gear pump. Among them, the one-way protection check valve is used to prevent the hydraulic oil in the oil supply hydraulic circuit from flowing back into the quantitative gear pump after the oil supply switch valve is closed; the high pressure oil filter is used to further filter the hydraulic oil output by the quantitative gear pump , so as to provide clean hydraulic oil for the hydraulic adjustment system.
优选地，所述供油液压回路与回油管路之间设置有溢流阀，且该溢流阀与所述供油液压回路之间的连接点位于所述单路保护单向阀和所述供油开关之间，并在系统油压高于油压设定值时工作溢油，对液压调节系统进行过压保护。Preferably, a relief valve is provided between the oil supply hydraulic circuit and the oil return line, and the connection point between the relief valve and the oil supply hydraulic circuit is located between the one-way protection check valve and the Between the oil supply switches, and when the system oil pressure is higher than the set value of the oil pressure, the work overflows to protect the hydraulic adjustment system from overpressure.
优选地，所述供油液压回路上设置有压力传感器，该压力传感器位于所述单路保护单向阀和所述蓄能器之间的管路上，且该压力传感器将检测到的所述定量齿轮泵输出的高压油的压力反馈到所述伺服电机的伺服驱动器中，形成闭环控制，使伺服电机根据反馈信号调节转速，进而调节定量齿轮泵输出的高压油的压力，使液压调节系统内的系统油压保持稳定。Preferably, the oil supply hydraulic circuit is provided with a pressure sensor, the pressure sensor is located on the pipeline between the one-way protection check valve and the accumulator, and the pressure sensor detects the quantitative The pressure of the high-pressure oil output by the gear pump is fed back to the servo driver of the servo motor to form a closed-loop control, so that the servo motor adjusts the speed according to the feedback signal, and then adjusts the pressure of the high-pressure oil output by the quantitative gear pump, so that the hydraulic adjustment system System oil pressure remains stable.
优选地，所述定量齿轮泵的进油口处设置有吸油滤油器，以对定量齿轮泵从油箱中吸入的液压油进行过滤，防止有大颗粒杂质被吸入到定量齿轮泵中，对定量齿轮泵造成损伤。Preferably, the oil inlet of the quantitative gear pump is provided with an oil suction filter to filter the hydraulic oil sucked by the quantitative gear pump from the oil tank to prevent large particles of impurities from being sucked into the quantitative gear pump. Damage to the gear pump.
优选地，所述回油管路上设置有回油滤油器，以对经回油管路回流到油箱中的液压油进行过滤，进而避免回流的液压油中的杂质进入到油箱中。Preferably, an oil return filter is provided on the oil return line to filter the hydraulic oil flowing back into the oil tank through the oil return line, thereby preventing impurities in the returned hydraulic oil from entering the oil tank.
优选地，所述供油液压回路上设置有供油保护单向阀，且该供油保护单向阀位于所述单路保护单向阀和所述供油开关阀之间，以避免液压油回流。Preferably, the oil supply hydraulic circuit is provided with an oil supply protection one-way valve, and the oil supply protection one-way valve is located between the one-way protection one-way valve and the oil supply switching valve to avoid hydraulic oil reflow.
优选地，选用插装阀作为第一卸荷阀和第二卸荷阀。Preferably, cartridge valves are selected as the first unloading valve and the second unloading valve.
本实用新型汽轮机用的液压调节系统采用伺服电机和定量齿轮泵配合的油源系统，系统响应时间只有30毫秒左右，响应迅速；采用由伺服阀和与卸荷阀配合的电磁阀组合形成的伺服油动机对油缸进行控制，可使油缸活塞快速下行或快速上行，从而在汽轮机或汽轮机组出现故障时，使汽轮机或汽轮机组快速关闭。油源系统中设置有至少两条供油液压回路，形成供油液压回路的冗余设置，当工作组的供油液压回路出现故障或进行检修时，可开启备用组的供油液压回路为液压调节系统供油，既方便维修人员对工作组供油液压回路进行维修或检修，又不影响液压调节系统的使用，为液压调节系统的运行提供了可靠的保障。油源系统采用溢流阀进行过压保护，节能且不发热，解决了液压调节系统的发热问题，可去除冷油器配置，降低液压调节系统的配置成本；利用压力传感器将定量齿轮泵的出油口处的高压油的压力反馈到伺服电机的伺服驱动器中，形成闭环控制，使伺服电机根据反馈信号调节转速，进而调节定量齿轮泵输出的高压油的压力，使液压调节系统内的系统油压保持稳定。The hydraulic regulating system for the steam turbine of the utility model adopts the oil source system matched with the servo motor and the quantitative gear pump, and the response time of the system is only about 30 milliseconds, and the response is fast; The oil motor controls the oil cylinder, which can make the piston of the oil cylinder go down or up quickly, so that when the steam turbine or the steam turbine unit fails, the steam turbine or the steam turbine unit can be shut down quickly. There are at least two oil supply hydraulic circuits in the oil source system to form a redundant setting of the oil supply hydraulic circuit. When the oil supply hydraulic circuit of the working group fails or is overhauled, the oil supply hydraulic circuit of the standby group can be turned on. Adjusting the oil supply of the system not only facilitates maintenance personnel to repair or overhaul the oil supply hydraulic circuit of the working group, but also does not affect the use of the hydraulic adjustment system, providing a reliable guarantee for the operation of the hydraulic adjustment system. The oil source system uses an overflow valve for overpressure protection, which saves energy and does not generate heat. It solves the heating problem of the hydraulic adjustment system, can remove the configuration of the oil cooler, and reduces the configuration cost of the hydraulic adjustment system; The pressure of the high-pressure oil at the oil port is fed back to the servo driver of the servo motor to form a closed-loop control, so that the servo motor adjusts the speed according to the feedback signal, and then adjusts the pressure of the high-pressure oil output by the quantitative gear pump, so that the system oil in the hydraulic adjustment system pressure remains stable.
附图说明Description of drawings
图1为本实用新型汽轮机用的液压调节系统的液压原理图。Fig. 1 is the hydraulic principle diagram of the hydraulic regulating system used by the steam turbine of the present invention.
具体实施方式detailed description
如图1所示，本实用新型汽轮机用的液压调节系统包括油源系统和伺服油动机。优选地，油源系统独立设置在油源油路块上，伺服油动机独立设置在油动机油路块上，使油源系统和伺服油动机相互独立，形成分体设置，便于安装。伺服油动机的数量可根据需要配置，比如，纯凝机组配置1个伺服油动机，单抽机组配置2个伺服油动机，双抽机组配置3个伺服油动机。As shown in Fig. 1, the hydraulic regulating system for the steam turbine of the present invention includes an oil source system and a servo oil motor. Preferably, the oil source system is independently arranged on the oil source block, and the servo oil motor is independently arranged on the oil block of the oil motor, so that the oil source system and the servo oil motor are independent of each other, forming a separate arrangement for easy installation. The number of servo oil motors can be configured according to needs, for example, a pure condensing unit is equipped with 1 servo oil motor, a single pumping unit is equipped with 2 servo oil motors, and a double pumping unit is equipped with 3 servo oil motors.
油源系统包括蓄能器9、回油管路和至少两条供油液压回路，其中，蓄能器9为伺服油动机的主要动力源。蓄能器9可根据需要选用，比如选用存储容积为25升、存储压力为8MPa的蓄能器。回油管路用以连接蓄能器9和油箱，并在回油管路上设置有回油开关阀，且该回油开关阀安装在蓄能器9旁边用以控制蓄能器9与油箱之间的回油管路的通、断。优选地，在回油管路上设置有回油滤油器10，且该回油滤油器10安装在油箱旁边，用以对经回油管路回流到油箱中的液压油进行过滤。优选地，回油滤油器10的内置滤芯的过滤精度为10微米。供油液压回路与蓄能器9连接，供油液压回路中的定量齿轮泵3在伺服电机2的驱动下从油箱中吸入液压油并将吸入的液压油输出充入到蓄能器9中，且在定量齿轮泵3与蓄能器9之间设置有供油开关阀，用于控制蓄能器9与定量齿轮泵3之间的供油管路的通、断。优选地，伺服电机2可选用输出功率为3KW的伺服电机。优选地，在定量齿轮泵3的进油口处设置有吸油滤油器1，用于对定量齿轮泵3从油箱中吸入的液压油进行过滤，以防止有大颗粒杂质被吸入到定量齿轮泵3中，对定量齿轮泵3造成损伤。优选地，吸油滤油器1可选用精度为100目的不锈钢滤芯。优选地，定量齿轮泵3的出油口处依次设置有单路保护单向阀4和高压滤油器5，其中，单路保护单向阀4用以防止供油液压回路中的液压油在供油开关阀关闭后回流到定量齿轮泵3中；高压滤油器5对定量齿轮泵3输出的液压油作进一步的过滤，以为液压调节系统提供清洁的液压油。优选地，高压滤油器5可选用过滤精度为5微米的滤芯。优选地，供油液压回路与回油管路之间设置有溢流阀6，且该溢流阀6与供油液压回路之间的连接点位于单路保护单向阀4和供油开关阀之间，即溢流阀6安装在单路保护单向阀4之后的高压油路中，以在系统油压高于油压设定值比如18MPa时工作溢油，降低液压调节系统中的系统油压，对液压调节系统进行过压保护。优选地，在供油液压回路上设置有压力传感器P，该压力传感器P位于单路保护单向阀4和蓄能器9之间的管路上，并将检测到的定量齿轮泵3出油口的油压反馈到伺服电机2的伺服驱动器中，形成闭环控制，使伺服电机2根据反馈信号调节转速，进而调节定量齿轮泵3输出的高压油的压力，使液压调节系统内的系统油压保持稳定。优选地，供油液压回路上设置有供油保护单向阀8，且该供油保护单向阀8位于单路保护单向阀4和供油开关阀之间以避免液压油回流，且供油保护单向阀8可设置在两条或者多条供油液压回路的汇集管路上，从而减少供油保护单向阀8的使用量，降低成本。优选地，供油保护单向阀8可选用板式单向阀。The oil source system includes an accumulator 9, an oil return pipeline and at least two oil supply hydraulic circuits, wherein the accumulator 9 is the main power source of the servo oil motor. The accumulator 9 can be selected as required, such as selecting an accumulator with a storage volume of 25 liters and a storage pressure of 8 MPa. The oil return line is used to connect the accumulator 9 and the oil tank, and an oil return switch valve is arranged on the oil return line, and the oil return switch valve is installed next to the accumulator 9 to control the flow between the accumulator 9 and the oil tank. The connection and disconnection of the oil return pipeline. Preferably, an oil return filter 10 is arranged on the oil return line, and the oil return filter 10 is installed next to the oil tank to filter the hydraulic oil flowing back into the oil tank through the oil return line. Preferably, the filter precision of the built-in filter element of the oil return filter 10 is 10 microns. The oil supply hydraulic circuit is connected with the accumulator 9, and the quantitative gear pump 3 in the oil supply hydraulic circuit sucks hydraulic oil from the oil tank under the drive of the servo motor 2 and outputs the sucked hydraulic oil into the accumulator 9, Moreover, an oil supply switch valve is arranged between the fixed-quantity gear pump 3 and the accumulator 9 for controlling the on-off of the oil-supply pipeline between the accumulator 9 and the fixed-quantity gear pump 3 . Preferably, the servo motor 2 may be a servo motor with an output power of 3KW. Preferably, an oil suction filter 1 is provided at the oil inlet of the quantitative gear pump 3 to filter the hydraulic oil sucked by the quantitative gear pump 3 from the oil tank to prevent large particles of impurities from being sucked into the quantitative gear pump 3, causing damage to the quantitative gear pump 3. Preferably, the oil suction filter 1 can use a stainless steel filter element with a precision of 100 mesh. Preferably, the oil outlet of the quantitative gear pump 3 is provided with a one-way protection check valve 4 and a high-pressure oil filter 5 in sequence, wherein the one-way protection check valve 4 is used to prevent the hydraulic oil in the oil supply hydraulic circuit from After the oil supply switch valve is closed, it flows back into the quantitative gear pump 3; the high-pressure oil filter 5 further filters the hydraulic oil output by the quantitative gear pump 3 to provide clean hydraulic oil for the hydraulic adjustment system. Preferably, the high-pressure oil filter 5 can use a filter element with a filtration precision of 5 microns. Preferably, a relief valve 6 is provided between the oil supply hydraulic circuit and the oil return line, and the connection point between the relief valve 6 and the oil supply hydraulic circuit is located between the one-way protection check valve 4 and the oil supply switch valve. In other words, the overflow valve 6 is installed in the high-pressure oil circuit after the one-way protection check valve 4, so that when the system oil pressure is higher than the oil pressure setting value, such as 18MPa, it will work to overflow the oil and reduce the system oil in the hydraulic adjustment system. Overpressure protection for the hydraulic adjustment system. Preferably, a pressure sensor P is provided on the oil supply hydraulic circuit, the pressure sensor P is located on the pipeline between the one-way protection check valve 4 and the accumulator 9, and the detected quantitative gear pump 3 oil outlet The oil pressure of the servo motor 2 is fed back to the servo driver of the servo motor 2 to form a closed-loop control, so that the servo motor 2 can adjust the speed according to the feedback signal, and then adjust the pressure of the high-pressure oil output by the quantitative gear pump 3, so that the system oil pressure in the hydraulic adjustment system can be maintained. Stablize. Preferably, the oil supply hydraulic circuit is provided with an oil supply protection check valve 8, and the oil supply protection check valve 8 is located between the one-way protection check valve 4 and the oil supply switch valve to avoid hydraulic oil backflow, and the supply The oil protection check valve 8 can be arranged on the converging pipelines of two or more oil supply hydraulic circuits, thereby reducing the usage of the oil supply protection check valve 8 and lowering the cost. Preferably, the oil supply protection check valve 8 can be a plate check valve.
油源系统的工作原理如下：The working principle of the oil source system is as follows:
定量齿轮泵3在伺服电机2的驱动下启动，经吸油滤油器1从油箱中吸入液压油(抗燃油或者抗磨油)，并将吸入的液压油转换成高压油输出，且从定量齿轮泵3输出的高压油经单路保护单向阀4、高压滤油器5充入到蓄能器9中，即向蓄能器9充油；定量齿轮泵3的出油口的压力经压力传感器P反馈到伺服电机的伺服驱动器中后，伺服驱动器根据反馈信号调节伺服电机2的转速，进而调节定量齿轮泵3输出的高压油的油压，从而使液压调节系统内的系统油压保持稳定。比如，蓄能器9处于充油状态时，当液压系统内的系统油压的设定值为12MPa时，在系统油压达到12MPa后，伺服电机将不再转动以保持系统油压稳定；蓄能器9处于供油工作状态时，蓄能器9中的油压逐渐消化降低，当蓄能器9中的油压降低到系统油压的设定值12MPa后，伺服电机2立即提速驱动定量齿轮泵3工作对蓄能器9中补充液压油。液压调节系统进行工作时的系统油压可依据实际阀门的提升力进行调整。The quantitative gear pump 3 starts under the drive of the servo motor 2, sucks in hydraulic oil (anti-fuel oil or anti-wear oil) from the oil tank through the oil suction filter 1, and converts the sucked hydraulic oil into high-pressure oil for output. The high-pressure oil output by the pump 3 is charged into the accumulator 9 through the one-way protection check valve 4 and the high-pressure oil filter 5, that is, oil is filled into the accumulator 9; After the sensor P feeds back to the servo driver of the servo motor, the servo driver adjusts the speed of the servo motor 2 according to the feedback signal, and then adjusts the oil pressure of the high-pressure oil output by the quantitative gear pump 3, so that the system oil pressure in the hydraulic adjustment system remains stable. . For example, when the accumulator 9 is in the oil-filled state, when the set value of the system oil pressure in the hydraulic system is 12MPa, after the system oil pressure reaches 12MPa, the servo motor will no longer rotate to keep the system oil pressure stable; When the accumulator 9 is in the oil supply working state, the oil pressure in the accumulator 9 gradually decreases, and when the oil pressure in the accumulator 9 drops to the set value of 12MPa for the system oil pressure, the servo motor 2 immediately speeds up and drives the quantitative The gear pump 3 works to replenish hydraulic oil in the accumulator 9 . When the hydraulic adjustment system is working, the system oil pressure can be adjusted according to the lifting force of the actual valve.
油源系统采用伺服电机和定量齿轮泵配合时，系统响应时间只有30毫秒左右，相较于响应时间为100毫秒的变量泵系统或者响应时间为150毫秒的定量泵系统，响应速度大幅度提升。另外，该油源系统利用压力传感器将定量齿轮泵的出油口的压力反馈到伺服驱动器中，形成闭环控制，使伺服电机的转速根据反馈信号进行调节，进而使液压调节系统中的系统油压保持稳定。When the oil source system uses a servo motor and a fixed-quantity gear pump, the system response time is only about 30 milliseconds. Compared with the variable pump system with a response time of 100 milliseconds or the fixed-quantity pump system with a response time of 150 milliseconds, the response speed is greatly improved. In addition, the oil source system uses a pressure sensor to feed back the pressure of the oil outlet of the quantitative gear pump to the servo drive to form a closed-loop control, so that the speed of the servo motor is adjusted according to the feedback signal, and then the system oil pressure in the hydraulic adjustment system keep it steady.
伺服油动机包括伺服机构和油缸15，且伺服机构包括伺服阀11、电磁阀12、第一卸荷阀13.1和第二卸荷阀13.2。其中，伺服阀11的进油口与供油液压回路连接，伺服阀11的出油口与回油管路连接，且伺服阀11的第一控制油口与油缸15的上腔口连接，伺服阀11的第二控制油口与油缸15的下腔口连接。优选地，在油缸15的上腔口和下腔口均设置有测压点，以对油缸15的上腔内的油压和下腔内的油压进行测量。优选地，伺服阀11可选用电液伺服阀或比例阀。电磁阀12的进油口与供油液压回路连接，电磁阀12的出油口与回油管路连接，且电磁阀12的控制油口通过第一卸荷阀13.1与油缸15的上腔口连接，电磁阀12的控制油口通过第二卸荷阀13.2与油缸15的下腔口连接，从而实现汽轮机或汽轮机组的快关操作。优选地，可选用OPC电磁阀作为电磁阀12，可选用插装阀作为第一卸荷阀13.1和第二卸荷阀13.2。油缸15上设置有检测油缸活塞的位移量用的位移传感器14，且该位移传感器14将检测到的油缸活塞的位移量反馈到汽轮机数字电液控制系统(DigitalElectricHydraulicControlSystem，简称DEH)中，从而带动调节汽轮机的相应动作。优选地，位移传感器14为成组配置，以保持将油缸活塞的位移量反馈到DEH中。The servo oil motor includes a servo mechanism and an oil cylinder 15, and the servo mechanism includes a servo valve 11, a solenoid valve 12, a first unloading valve 13.1 and a second unloading valve 13.2. Wherein, the oil inlet of the servo valve 11 is connected with the oil supply hydraulic circuit, the oil outlet of the servo valve 11 is connected with the oil return pipeline, and the first control oil port of the servo valve 11 is connected with the upper cavity port of the oil cylinder 15, the servo valve The second control oil port of 11 is connected with the lower chamber port of oil cylinder 15. Preferably, pressure measuring points are provided at both the upper cavity and the lower cavity of the oil cylinder 15 to measure the oil pressure in the upper cavity and the lower cavity of the oil cylinder 15 . Preferably, the servo valve 11 may be an electro-hydraulic servo valve or a proportional valve. The oil inlet of the solenoid valve 12 is connected to the oil supply hydraulic circuit, the oil outlet of the solenoid valve 12 is connected to the oil return pipeline, and the control oil port of the solenoid valve 12 is connected to the upper cavity of the oil cylinder 15 through the first unloading valve 13.1 , the control oil port of the solenoid valve 12 is connected with the lower chamber port of the oil cylinder 15 through the second unloading valve 13.2, so as to realize the fast closing operation of the steam turbine or steam turbine unit. Preferably, an OPC solenoid valve can be selected as the solenoid valve 12, and a cartridge valve can be selected as the first unloading valve 13.1 and the second unloading valve 13.2. The oil cylinder 15 is provided with a displacement sensor 14 for detecting the displacement of the oil cylinder piston, and the displacement sensor 14 feeds back the detected displacement of the oil cylinder piston to the steam turbine digital electro-hydraulic control system (Digital Electric Hydraulic Control System, referred to as DEH), thereby driving the adjustment The corresponding action of the steam turbine. Preferably, the displacement sensors 14 are configured in groups to keep feeding back the displacement of the cylinder piston to the DEH.
伺服油动机的工作原理如下：The working principle of the servo oil motor is as follows:
在DEH给定汽轮机或汽轮机组开大或者开小得到控制指令后，该控制指令作用在伺服机构中的伺服阀11上使其动作，使油源系统中的高压油进入到油缸15的下腔内，进而通过油缸15上腔内和下腔内的油压压差推动油缸活塞上行，即向上移动，并由位移传感器14将油缸活塞上行的位移量反馈到DEH中，从而带动汽轮机或汽轮机组执行响应的控制指令；或者使油源系统中的高压油进入到油缸15的上腔内，进而通过油缸15上腔内和下腔内的油压压差推动油缸活塞下行，即向下移动，并由位移传感器14将油缸活塞下行的位移量反馈到DEH中，从而带动汽轮机或汽轮机组执行相应的控制指令。After the DEH gives the steam turbine or the steam turbine unit to open up or down to get the control command, the control command acts on the servo valve 11 in the servo mechanism to make it act, so that the high-pressure oil in the oil source system enters the lower chamber of the oil cylinder 15 Then, through the oil pressure difference between the upper cavity and the lower cavity of the oil cylinder 15, the oil cylinder piston is pushed upward, that is, it moves upward, and the displacement sensor 14 feeds back the upward displacement of the oil cylinder piston to the DEH, thereby driving the steam turbine or steam turbine unit Execute the corresponding control command; or make the high-pressure oil in the oil source system enter the upper chamber of the oil cylinder 15, and then push the oil cylinder piston down through the oil pressure difference between the upper chamber and the lower chamber of the oil cylinder 15, that is, move downward, And the displacement sensor 14 feeds back the downward displacement of the oil cylinder piston to the DEH, thereby driving the steam turbine or the steam turbine unit to execute corresponding control commands.
当汽轮机或汽轮机组出现故障需要停机或快速关闭时，电磁阀12动作使第一卸荷阀13.1和第二卸荷阀13.2打开，高压油快速充入到油缸15的上腔内，并快速卸去油缸15下腔内的液压油，使油缸活塞快速下行关闭汽轮机或汽轮机组。当然，也可以通过油缸活塞快速上行关闭汽轮机或汽轮机组，此时，电磁阀12通过第一卸荷阀13.1与油缸15的下腔口连接，电磁阀12通过第二卸荷阀13.2与油缸15的上腔口连接。在使用OPC电磁阀配合插装阀实现汽轮机或汽轮机组的快关操作时，关闭时间常数小于0.5秒，响应迅速。When the steam turbine or steam turbine unit breaks down and needs to be shut down or quickly closed, the solenoid valve 12 acts to open the first unloading valve 13.1 and the second unloading valve 13.2, and the high-pressure oil is quickly charged into the upper chamber of the oil cylinder 15 and quickly unloaded. Remove the hydraulic oil in the lower chamber of the oil cylinder 15, so that the oil cylinder piston descends quickly and closes the steam turbine or steam turbine unit. Of course, the steam turbine or steam turbine unit can also be closed quickly through the oil cylinder piston. At this time, the solenoid valve 12 is connected to the lower cavity of the oil cylinder 15 through the first unloading valve 13.1, and the solenoid valve 12 is connected to the oil cylinder 15 through the second unloading valve 13.2. The upper cavity connection. When the OPC solenoid valve is used in conjunction with the cartridge valve to realize the fast closing operation of the steam turbine or steam turbine unit, the closing time constant is less than 0.5 seconds, and the response is quick.
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| CN113503275B (en) * | 2021-05-12 | 2025-08-15 | 江苏省交通工程集团有限公司 | Intelligent servo hoist system for ship lock |
| CN114109939A (en) * | 2021-11-10 | 2022-03-01 | 凤凰汇通(杭州)科技有限公司 | An energy-saving hydraulic system for high-speed motion servo control of oil cylinder |
| CN114183578A (en) * | 2021-12-29 | 2022-03-15 | 华能重庆两江燃机发电有限责任公司 | Electromagnetic valve, control system and control method for inhibiting abnormal operation of turbine overspeed system |
| CN114658701A (en) * | 2022-03-28 | 2022-06-24 | 上海电气集团股份有限公司 | Electro-hydraulic actuator and control method and control device thereof |
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