CN106768091B - A water flow and temperature measurement device for generating unit efficiency testing - Google Patents
A water flow and temperature measurement device for generating unit efficiency testing Download PDFInfo
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- CN106768091B CN106768091B CN201710165589.4A CN201710165589A CN106768091B CN 106768091 B CN106768091 B CN 106768091B CN 201710165589 A CN201710165589 A CN 201710165589A CN 106768091 B CN106768091 B CN 106768091B
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 50
- 238000012360 testing method Methods 0.000 title claims abstract description 48
- 238000009529 body temperature measurement Methods 0.000 title claims abstract description 13
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 claims abstract description 18
- 229910052697 platinum Inorganic materials 0.000 claims abstract description 9
- 230000007704 transition Effects 0.000 claims description 7
- 238000005259 measurement Methods 0.000 abstract description 6
- 239000002826 coolant Substances 0.000 description 8
- 239000000498 cooling water Substances 0.000 description 6
- 238000009434 installation Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F15/00—Details of, or accessories for, apparatus of groups G01F1/00 - G01F13/00 insofar as such details or appliances are not adapted to particular types of such apparatus
- G01F15/18—Supports or connecting means for meters
- G01F15/185—Connecting means, e.g. bypass conduits
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K1/00—Details of thermometers not specially adapted for particular types of thermometer
- G01K1/14—Supports; Fastening devices; Arrangements for mounting thermometers in particular locations
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K7/00—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements
- G01K7/16—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using resistive elements
- G01K7/18—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using resistive elements the element being a linear resistance, e.g. platinum resistance thermometer
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Monitoring And Testing Of Nuclear Reactors (AREA)
Abstract
本发明公开了一种用于发电机效率试验水流量和温度测量装置，包括连接发电机进水管和发电机出水管的管道；管道包括与发电机进水管连接的第一连接部、与第一连接部连接的仪表试验段和与发电机出水管连接的第二连接部；第一连接部和仪表试验段之间设置有测温铂电阻；仪表试验段依次包括前端直管段、流量计、后端直管段、节流阀和排水孔；本发明能适应不同水流量系统测试，流速均匀、温度稳定、测试准确，并且温差可调范围大，测量误差小；可适用于汽轮发电机、核能发电机及水轮发电机的效率试验，具有良好的推广及应用价值。
The invention discloses a water flow and temperature measurement device for generator efficiency testing, which includes a pipeline connecting a generator water inlet pipe and a generator water outlet pipe; the pipeline includes a first connection part connected to the generator water inlet pipe, and a first connecting part connected to the generator water inlet pipe. The instrument test section is connected to the connecting part and the second connection part is connected to the generator outlet pipe; a temperature-measuring platinum resistance is provided between the first connection part and the instrument test section; the instrument test section includes a front straight pipe section, a flow meter, and a rear section in sequence. End-straight pipe section, throttle valve and drainage hole; the invention can adapt to different water flow system tests, with uniform flow rate, stable temperature, accurate test, large adjustable range of temperature difference and small measurement error; it can be applied to turbine generators, nuclear energy The efficiency test of generators and hydrogenerators has good promotion and application value.
Description
技术领域Technical field
本发明涉及发电机效率试验测量装置，具体涉及一种用于发电机组效率试验水流量和温度测量装置。The invention relates to a generator efficiency test and measurement device, and in particular to a water flow and temperature measurement device used in a generator set efficiency test.
背景技术Background technique
在现场发电机效率试验中，需要检验发电机在发电过程中能量转换的情况；效率影响发电机耗能的多少，在电机带载时，电机的所有损耗最终都变成热，而这些热传给冷却介质；因此只要测得冷却介质的温升和流量，即可求得电机的各项损耗，从而得到电机的效率；此时就需要相应的试验装置来测量冷却介质的流量和温升；目前还没有针对此项试验的相应测量装置。In the on-site generator efficiency test, it is necessary to examine the energy conversion of the generator during the power generation process; efficiency affects the amount of energy consumed by the generator. When the motor is loaded, all losses of the motor eventually turn into heat, and these heat transfer The cooling medium is supplied; therefore, as long as the temperature rise and flow rate of the cooling medium are measured, the various losses of the motor can be obtained, thereby obtaining the efficiency of the motor; at this time, corresponding test devices are needed to measure the flow rate and temperature rise of the cooling medium; There is currently no corresponding measuring device for this test.
发明内容Contents of the invention
本发明提供一种用于发电机效率试验时冷却介质流量和温度测量装置。The invention provides a cooling medium flow and temperature measurement device used in generator efficiency testing.
本发明采用的技术方案是：一种用于发电机效率试验水流量和温度测量装置，包括连接发电机进水管和发电机出水管的管道；管道包括与发电机进水管连接的第一连接部、与第一连接部连接的仪表试验段和与发电机出水管连接的第二连接部；第一连接部和仪表试验段之间设置有测温铂电阻；仪表试验段依次包括前端直管段、流量计、后端直管段、节流阀和排气孔。The technical solution adopted by the present invention is: a water flow and temperature measurement device for generator efficiency testing, including a pipe connecting the generator water inlet pipe and the generator water outlet pipe; the pipe includes a first connection part connected to the generator water inlet pipe. , the instrument test section connected to the first connection part and the second connection part connected to the generator outlet pipe; a temperature measuring platinum resistor is set between the first connection part and the instrument test section; the instrument test section includes the front straight pipe section, Flowmeter, back-end straight pipe section, throttle valve and vent.
进一步的，所述管道为U型或Ω型。Further, the pipeline is U-shaped or Ω-shaped.
进一步的，所述第一连接部还设置有过渡软管。Furthermore, the first connection part is also provided with a transition hose.
进一步的，所述第一连接部和仪表试验段之间通过第一节流锥形管连接，仪表试验段和第二连接部之间通过第二节流锥形管连接。Further, the first connecting part and the instrument test section are connected through a first throttling tapered tube, and the instrument testing section and the second connecting part are connected through a second throttling tapered tube.
进一步的，还设置有至少一个高度可调的管道安装支架用于支撑管道。Further, at least one height-adjustable pipe installation bracket is provided for supporting the pipe.
进一步的，所述过渡软管与仪表试验段之间还设置有延长管。Furthermore, an extension pipe is provided between the transition hose and the instrument test section.
进一步的，所述第一连接部通过第一法兰弯管连接发电机进水管，其中弯管两端的法兰尺寸不同。Further, the first connection part is connected to the generator water inlet pipe through a first flange elbow, wherein the flange sizes at both ends of the elbow are different.
进一步的，所述第二连接部通过第二法兰弯管连接发电机出水管，其中弯管两端的法兰尺寸不同。Further, the second connection part is connected to the generator water outlet pipe through a second flange elbow, wherein the flange sizes at both ends of the elbow are different.
进一步的，所述测温铂电阻、流量计和节流阀均通过带法兰的弯管设置在管道上。Further, the platinum temperature measuring resistor, flow meter and throttle valve are all installed on the pipeline through an elbow with a flange.
本发明的有益效果是：The beneficial effects of the present invention are:
(1)本发明中冷却水通过法兰弯管变换，再经过节流锥形管、节流阀的作用使其流速均匀，充满测量管道；通过递减节流后使其流速提高，提高流量的测量精度；(1) In the present invention, the cooling water is transformed through the flange elbow, and then passes through the throttling tapered pipe and the throttling valve to make the flow rate uniform and fill the measuring pipe; by decreasing the throttling, the flow rate is increased, and the flow rate is increased. measurement accuracy;
(2)本发明可通过节流阀和节流锥形管调节水流量的大小，经仪表测量端的管径递次缩小后，雷诺数在一定范围内，水流均匀且保持在层流状态，当调节节流阀使水流量变小，其出水温度变大，提高温差的测量精度；(2) The present invention can adjust the water flow through the throttle valve and the throttle tapered pipe. After the pipe diameter at the measuring end of the instrument is successively reduced, the Reynolds number is within a certain range, and the water flow is uniform and maintained in a laminar flow state. Adjust the throttle valve to make the water flow smaller, its outlet water temperature larger, and improve the temperature difference measurement accuracy;
(3)本发明可用于汽轮发电机、核能发电机及水轮发电机等以水作为二次冷却介质的电机效率试验，具有很好的推广及应用价值。(3) The present invention can be used for motor efficiency tests using water as a secondary cooling medium such as steam turbine generators, nuclear power generators and hydraulic generators, and has good promotion and application value.
附图说明Description of the drawings
图1为本发明主视图。Figure 1 is a front view of the present invention.
图2为本发明立式安装示意图。Figure 2 is a schematic diagram of the vertical installation of the present invention.
图3为卧式安装示意图。Figure 3 is a schematic diagram of horizontal installation.
图4为本发明中管道安装支架结构示意图。Figure 4 is a schematic structural diagram of the pipeline installation bracket in the present invention.
图中：1-发电机进水管，2-第一法兰弯管，3-过渡软管，4-延长管，5-测温铂电阻，6-前端直管段，7-流量计，8-后端直管段，9-节流阀，10-管道安装支架，11-排气孔，12-第二法兰弯管，13-发电机出水管。In the picture: 1-Generator water inlet pipe, 2-First flange elbow, 3-Transition hose, 4-Extension pipe, 5-Temperature measuring platinum resistance, 6-Front end straight pipe section, 7-Flow meter, 8- Rear end straight pipe section, 9-throttle valve, 10-pipe mounting bracket, 11-exhaust hole, 12-second flange elbow, 13-generator outlet pipe.
具体实施方式Detailed ways
下面结合附图和具体实施例对本发明做进一步说明。The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.
如图1-3所示，一种用于发电机组效率试验水流量和温度测量装置，包括连接发电机进水管1和发电机出水管13的管道；管道包括与发电机进水管1连接的第一连接部、与第一连接部连接的仪表试验段和与发电机出水管13连接的第二连接部；第一连接部和仪表试验段之间设有测温铂电阻5；仪表试验段依次包括前端直管段6、流量计7、后端直管段8、节流阀9和排气孔11。As shown in Figure 1-3, a water flow and temperature measurement device for a generator set efficiency test includes a pipe connecting the generator water inlet pipe 1 and the generator water outlet pipe 13; the pipe includes a third pipe connected to the generator water inlet pipe 1. A connection part, an instrument test section connected to the first connection part and a second connection part connected to the generator water outlet pipe 13; a temperature measuring platinum resistor 5 is provided between the first connection part and the instrument test section; the instrument test section is in sequence It includes a front straight pipe section 6, a flow meter 7, a rear straight pipe section 8, a throttle valve 9 and an exhaust hole 11.
使用时，冷却水由发电机进水管1经第一连接部、测温铂电阻5、仪表试验段和第二连接部进入发电机出水管13，并先通过排气孔11排出管道中多余的空气；仪表试验段管道内的水经转换流经前端直管段6变换，再经由节流阀9作用后，其流速均匀，平行于轴线流动的流线；测量冷却水的出水温度T1，冷却水进入发电机之前的温度为T0，其温差为T1-T0。When in use, the cooling water enters the generator outlet pipe 13 from the generator water inlet pipe 1 through the first connection part, the temperature measuring platinum resistor 5, the instrument test section and the second connection part, and is first discharged through the exhaust hole 11. Air; the water in the pipe of the instrument test section flows through the straight pipe section 6 at the front end through conversion, and then passes through the throttle valve 9, and its flow rate is uniform and parallel to the axis of the streamline; measure the outlet temperature T 1 of the cooling water, cooling The temperature of water before entering the generator is T 0 , and its temperature difference is T 1 -T 0 .
在进行发电机效率试验时，电机产生的损耗通过冷却水带走，根据国标GB/T5321-2005，损耗P可按如下公式计算：During the generator efficiency test, the loss generated by the motor is taken away by the cooling water. According to the national standard GB/T5321-2005, the loss P can be calculated according to the following formula:
P＝Cp·ρ·Q·(T1-T0)P＝C p ·ρ·Q·(T 1 -T 0 )
公式中，Cp为水的比热，kJ/kg/K；In the formula, C p is the specific heat of water, kJ/kg/K;
ρ为水的密度，kg/m3；ρ is the density of water, kg/m 3 ;
Q为水流量，m3/h；Q is water flow rate, m 3 /h;
T1为出水温度，℃；T 1 is the outlet water temperature, ℃;
T0为进水温度，℃。T 0 is the inlet water temperature, ℃.
进一步的，所述管道为U型或Ω型；管道也可以为适应具体情况的其他形状，管道尺寸和型号不尽相同，经过弯管法兰和仪表测量端后管径会相应缩小。Furthermore, the pipeline is U-shaped or Ω-shaped; the pipeline can also be in other shapes adapted to specific conditions, with different pipeline sizes and models. The pipe diameter will be reduced accordingly after passing through the elbow flange and the instrument measuring end.
进一步的，所述第一连接部还设置有过渡软管3；设置过渡软管3可适应不同连接距离和高度。Furthermore, the first connection part is also provided with a transition hose 3; the transition hose 3 can be adapted to different connection distances and heights.
进一步的，所述第一连接部和仪表试验段之间通过第一节流锥形管连接，仪表试验段和第二连接部之间通过第二节流锥形管连接；冷却水经由第一节流锥形管的作用后至仪表试验段，然后经第二节流锥形管放大后经第二连接部进入发电机出水管13；可以使得其流速更加均匀，减小测量误差。Further, the first connecting part and the instrument test section are connected through a first throttling tapered pipe, and the instrument testing section and the second connecting part are connected through a second throttling tapered pipe; the cooling water passes through the first After the throttling tapered tube acts, it reaches the instrument test section, and then is amplified by the second throttling tapered tube and then enters the generator outlet pipe 13 through the second connection part; this can make its flow rate more uniform and reduce measurement errors.
进一步的，还设置有至少一个高度可调的管道安装支架10用于支撑管道；通过设置管道安装支架10可以更加方便的调节试验管道的放置高度，适应不同的管道。Furthermore, at least one height-adjustable pipe installation bracket 10 is provided for supporting the pipe; by providing the pipe installation bracket 10, the placement height of the test pipe can be more conveniently adjusted to adapt to different pipes.
进一步的，所述过渡软管3与仪表试验段之间还设置有延长管4。Furthermore, an extension pipe 4 is provided between the transition hose 3 and the instrument test section.
进一步的，所述第一连接部通过第一法兰弯管2连接发电机进水管1。Furthermore, the first connection part is connected to the generator water inlet pipe 1 through the first flange elbow 2 .
进一步的，所述第二连接部通过第二法兰弯管12连接发电机出水管13。Furthermore, the second connection part is connected to the generator water outlet pipe 13 through the second flange elbow 12 .
进一步的，所述测温铂电阻5、流量计7和节流阀9均通过带法兰的弯管设置在管道上。Further, the platinum temperature measuring resistor 5, the flow meter 7 and the throttle valve 9 are all arranged on the pipeline through a flanged elbow.
水经由法兰弯管、节流锥形管、节流阀9的作用后，其流速均匀，平行于轴线流动的流线；本发明能有效调节冷却水流量，提升水流速度仍满足雷诺数限值，达到满管且处于层流状态；并且通过两次递减节流，流量减小，增大冷却进出水间的温差，减小测量误差，提高流量和温度测量精度，从而提升效率的测试精度；本发明用于发电机效率试验的冷却介质参数测量的装置，该装置一端为90°法兰，另一端为带软管的法兰，可适应不同连接距离及角度；能精确的测量冷却介质的流量和温度，精确计算电机的损耗，可用于测量空气、推力轴承、导轴承等冷却器带走的损耗，还可以用于汽轮发电机、核能发电机及水轮发电机等以水作为二次冷却介质的电机效率试验，具有良好的推广及应用价值。After the water passes through the flange elbow, the throttle tapered pipe, and the throttle valve 9, its flow rate is uniform and parallel to the streamline flowing along the axis; the present invention can effectively adjust the cooling water flow and increase the water flow speed while still meeting the Reynolds number limit. value, reaches the full pipe and is in a laminar flow state; and through two decreasing throttling, the flow rate is reduced, increasing the temperature difference between the cooling inlet and outlet water, reducing the measurement error, improving the flow and temperature measurement accuracy, thereby improving the efficiency test accuracy ; The present invention is a device for measuring cooling medium parameters for generator efficiency testing. One end of the device is a 90° flange and the other end is a flange with a hose. It can adapt to different connection distances and angles; it can accurately measure the cooling medium. The flow rate and temperature can accurately calculate the loss of the motor. It can be used to measure the loss taken away by coolers such as air, thrust bearings, guide bearings, etc. It can also be used for steam turbine generators, nuclear energy generators, hydroelectric generators, etc. that use water as the The motor efficiency test of secondary cooling medium has good promotion and application value.
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