JB/T 7072-1993 Series of hydraulic turbine speed governors and hydraulic devices JB/T7072-1993 Standard download decompression password: www.bzxz.net

Mechanical Industry Standard of the People's Republic of China
Subject content and scope of application of series spectrum of turbine speed governors and hydraulic devices
This standard specifies the product classification and series spectrum compilation principles of turbine speed governors and hydraulic devices. JB/T7072
Replaces JB/Z148-79
This standard applies to mixed flow, axial flow, impulse turbine governors (including operators, electronic load regulators, etc. and matching hydraulic devices.
2 Product classification
2.1 Governor:
Governor with pressure tank and relay;
Governor without pressure tank and relay; through-flow governor.
2.2 Operator:
Hydraulic operator;
Electric operator.
2.3 Electronic load regulator.
3 Principles for the compilation of governor model spectrum
Divided into large, medium, small and special according to capacity. There are four basic series of small-sized ones (see Table 1). 3.2 The rated oil pressure levels of the speed governor and hydraulic operator are 2.5MPa; 4.0MPa; 6.3MPa. Within the capacity range of each series, they are basically connected to each other, and there should be no large blank areas. The speed governor without a relay is characterized by the main 3.3
pressure regulating valve diameter and the allowable oil flow rate (see Table 2); the speed governor with a relay is characterized by the relay capacity (see Table 3). 3.42
The capacity range of the speed governor without a relay should be determined according to the following principles. a.
The design flow rate of the external pipeline matched with the speed governor generally does not exceed 5m/s: the oil pressure for calculating the speed governor capacity should be considered according to the lower limit of the normal working oil pressure; through the main distribution The maximum pressure drop of the pressure valve and the connecting pipe shall not exceed 20% to 30% of the rated oil pressure; the shortest closing time of the relay shall meet the requirements of the unit. 3.5 The capacity of the hydraulic operator is characterized by the relay capacity, which is the same as the speed governor with a relay. The relay capacity can be referred to Table 3. The electric operator is characterized by the product of the output shaft torque and the rotation angle M·O, and its capacity level is included in the speed governor series range. 3.6 The capacity of the electronic load regulator is characterized by the maximum output of the unit it is equipped with. The unit is kilowatt (kW), and the capacity level is consistent with the generator capacity level.
4 Hydraulic device series spectrum
This spectrum is applicable to separate and combined hydraulic devices. 4.1 Principles for determining the capacity level of hydraulic devices. 4.1.1 In Under the premise of meeting the use requirements, the varieties and specifications should be reduced as much as possible. Approved by the Ministry of Machinery Industry on October 8, 1993
Implementation on January 1, 1994
JB/T7072
4.1.2 For ease of manufacturing, the pressure tank head should adopt the standard head size. 93
4.1.3 The classification of capacity grades should be based on the current production varieties and the stability and appearance of the device. The recommended ratio of the height to the diameter of the oil tank is 2 to 3.5. The capacity is small and is characterized by the volume of the pressure tank in cubic meters. 4.2
The series of oil pressure devices are shown in Table 4.
Extra small
Speed ​​regulator without pressure tank and relay\
>30 000
>10000~300002)
>3 000-~ 10 0002)
1703 00021
Speed ​​governor with pressure tank and servo
Speed ​​governor capacity classification series
Through-flow type speed governor
Pressurized operator
Servomotor capacity range, N·m
>10 000~30 000
>1500~10 000
17015002
Note: 1) Refers to the servomotor capacity that the speed governor can be equipped with; 2) Refers to the single-nozzle impulse turbine speed governor; 3) It is not recommended to use electric regulator for small-sized speed governors.
Table 2 Governor without servomotor
Main pressure regulating valve diameter
Note: 1) The first-stage amplification system is indicated by the pilot valve diameter. Table 3
Regulator with servomotor and relay
Constant pressure servomotor
Differential pressure servomotor
170~3000
Electric operator
Electronic load regulator
Power of matching unit, kw
>10000~30000>10000~30000
>3000~10 000
170~3000
>3 000~10 000
Diameter of main pressure regulating valve, allowable oil flow and rated oil pressure parameter table Allowable oil flow range
50~100
100~150
Rated oil pressure
2.5,4.0www.bzxz.net
2.5,4.0
40,75.100
2.5,4.0,6.3
2.5,4.0,6.3
2.5,4.0,6.3
2.5,4.0,6.3
Speed ​​regulator with pressure tank and servomotor Servomotor capacity and related parameter table Servomotor capacity
30 000
10 000
Minimum closing time of relay
Rated sleeve pressure
Through-flow network speed device
Type of hydraulic device
Hydraulic device series
Additional instructions:
JB/T7072—93
Continued Table 3
Servomotor capacity
Minimum closing time of relay
Hydraulic device series table
YZ-16/2 (or YZ-16)
YZ-20/2 (or YZ-20)
YZ-25/2 (or YZ-25)
YZ-32/2
YZ-40/2
This standard is proposed by the Control Equipment Sub-Technical Committee of the National Technical Committee for Standardization of Hydraulic Turbines. This standard is under the jurisdiction of Harbin Large Electric Motor Research Institute and Tianjin Electric Drive Design Institute of the Ministry of Machinery Industry. Harbin Large Electric Motor Research Institute and Tianjin Electric Drive Design Institute are responsible for drafting this standard. The main drafters of this standard are Wang Tingbao and Li Huang. From the date of implementation of this standard, JB/Z148--79 "Series of Types of Turbine Speed ​​Governors and Hydraulic Devices" will be invalidated, and the rated oil pressure
Tip: This standard content only shows part of the intercepted content of the complete standard. If you need the complete standard, please go to the top to download the complete standard document for free.