JB/T 3565-1992 Efficiency of long-axis centrifugal deep well pumps

This standard specifies the efficiency index of the working part of the long-axis centrifugal deep-well pump. This standard is applicable to pumps with flow rate Q=5~1500m3/h, specific speed ns=110~300 (or type number K=0.569~1.55). JB/T 3565-1992 Long-axis centrifugal deep-well pump efficiency JB/T3565-1992 Standard download decompression password: www.bzxz.net

Mechanical Industry Standard of the People's Republic of China
JB/T3565-92
Long-axis centrifugal deep-well pump
Issued on December 25, 1992
Implemented on July 1, 1993
Issued by the Ministry of Machinery and Electronics Industry of the People's Republic of China
Mechanical Industry Standard of the People's Republic of China
Efficiency of long-axis centrifugal deep-well pump
Subject content and scope of application
This standard specifies the efficiency indicators of the working part of the long-axis centrifugal deep-well pump (hereinafter referred to as the "pump"). JB/T3565-92
Replaces JB3565-84
This standard applies to pumps with flow rate Q=5～1500m/h, specific speed n=110～300 (or type number K0.569~1.55). 2 Efficiency
2.1 The efficiency of the working part of the pump refers to the ratio of the output power of the working part of the pump to the input power (excluding the loss of the transmission shaft and the water pipe). It is a value based on clean water at normal temperature (0～40℃) as the medium. 2.2 The highest (or specified point) efficiency of the pump should not be lower than the curve A of Figure 1 or the provisions of column A in the following table. 2.3 Within the allowable working range of the pump, the efficiency of other points shall not be lower than the curve B of Figure 1 or the provisions of column B in the following table. 7%
Flow Q
405060
80100150200
Figure 1 Pump efficiency with n=110～210
30040050060080010001500
2.4 For the specific speed n, the pump efficiency in the range of 210～300 should be corrected according to the curve in Figure 2. Approved by the Ministry of Machinery and Electronics Industry on December 25, 1992, 900
Implemented on July 1, 1993
3 Application method
JB/T3565-92
Figure 2>210~300 pump efficiency correction value
Example 1: The flow rate Q=50m/h and the specific speed n=250 of the highest efficiency point (or specified point) of a long-axis centrifugal pump are Q=50m/h and n=250, and its efficiency value ni is calculated.
From the A column of the table or the A curve in Figure 1, the efficiency n=71.5% of Q50m/h is obtained, and the efficiency correction value An=1% of n=250 is obtained from Figure 2. bzxz.net
So: m=n-△n=71.5%-1%=70.5%. Example 2: The flow rate of a long-axis centrifugal pump at the highest efficiency point (or specified point) is the same as Example 1. Find the efficiency value 7z of the pump within the working range of Q=30m/h and n=230.
From the B column of the table or the B curve in Figure 1, the efficiency 7=63.5% for Q=30m/h is obtained, and the efficiency correction value n=0.5% for n=230 is obtained from Figure 2.
So: n=-A=63.5%-0.5%=63%.
Additional remarks:
This standard is proposed and managed by Shenyang Pump Research Institute. This standard is drafted by Shenyang Pump Research Institute. The main drafter of this standard is Zhang Lifu.
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