Apparatus and system for diagnosing fluid machinery performance
Apparatus and system for diagnosing fluid machinery performance
 CN 101,438,060 A
 Filed: 04/18/2006
 Published: 05/20/2009
 Est. Priority Date: 04/18/2006
 Status: Active Application
First Claim
1. , a kind of performance diagnogtics device of fluid machinery is characterized in that,Have anticipation performance curve arithmetic mean unit and performance diagnogtics arithmetic mean unit, wherein, abovementioned anticipation performance curve arithmetic mean unit according to the compression ratio of fluid machinery or pressure difference and inlet flow rate to each of a plurality of fluid controlled quentity controlled variables with the characteristic nondimensionalization, obtain the curve of the relation between expression pressure coefficient and the flow coefficient;
 Fluid controlled quentity controlled variable, suction pressure, head pressure, inlet temperature, compressibility coefficient, gas mean molecule quantity, heat capacity ratio when abovementioned performance diagnogtics arithmetic mean unit moves according to abovementioned fluid machinery, obtain measured performance pressure reduction, and according to anticipation performance curve, fluid controlled quentity controlled variable and inlet flow rate, obtain anticipation performance pressure reduction, according to the ratio of anticipation performance pressure reduction and measured performance pressure reduction, operational performance impairment grade.
Chinese PRB Reexamination
Abstract
Provided is a performance diagnosing apparatus for a fluid machine, which is characterized by comprising a predicted performance curve computer for making the characteristics dimensionless for each of a plurality of fluid control quantities from a compression ratio or a pressure difference and an input flow rate of the fluid machine, thereby to determine a curve indicating the relation between the pressure coefficient and the flow rate coefficient, and a performance diagnosing computer for determining an actually measured performance head from a fluid control quantity, an intake pressure, a discharge pressure, an intake temperature, a compression coefficient, a gas average molecular weight and a specific heat ratio at the running time of the fluid machine, and for determining a predicted performance head from the predicted performance curve, the fluid control quantity and the input flow rate, thereby to compute the degree of performance deterioration from the ratio between the predicted performance head and the actually measured performance head.

1 Citation
Integrated fullautomatic test system for fan and water pump  
Patent #
CN 104,088,783 A
Filed 06/17/2014

Current Assignee

No References
4 Claims

1. , a kind of performance diagnogtics device of fluid machinery is characterized in that,
Have anticipation performance curve arithmetic mean unit and performance diagnogtics arithmetic mean unit, wherein, abovementioned anticipation performance curve arithmetic mean unit according to the compression ratio of fluid machinery or pressure difference and inlet flow rate to each of a plurality of fluid controlled quentity controlled variables with the characteristic nondimensionalization, obtain the curve of the relation between expression pressure coefficient and the flow coefficient;  Fluid controlled quentity controlled variable, suction pressure, head pressure, inlet temperature, compressibility coefficient, gas mean molecule quantity, heat capacity ratio when abovementioned performance diagnogtics arithmetic mean unit moves according to abovementioned fluid machinery, obtain measured performance pressure reduction, and according to anticipation performance curve, fluid controlled quentity controlled variable and inlet flow rate, obtain anticipation performance pressure reduction, according to the ratio of anticipation performance pressure reduction and measured performance pressure reduction, operational performance impairment grade.

2. according to the performance diagnogtics device of the described fluid machinery of claim 1, it is characterized in that,
Measured performance pressure reduction is obtained by following formula, is P in suction pressure promptly _{s}, head pressure is P _{d}, inlet temperature is T _{s}, compressibility coefficient is that Z, gas mean molecule quantity are M _{w}, when heat capacity ratio is k, β  =(k1)/k, calculate measured performance pressure reduction H with following formula _{Real},
H _{real}＝
Z·
1/β
·
T _{s}/M _{w}·
{(P _{d}/P _{s})β
1}
 =(k1)/k, calculate measured performance pressure reduction H with following formula _{Real},

3. according to the performance diagnogtics device of claim 1 or 2 described fluid machineries, it is characterized in that,
Have abovementioned performance degradation degree is carried out differential to calculate the performance variation rate arithmetic mean unit of performance degradation degree variance ratio.

4. , a kind of performance diagnostic system of fluid machinery is characterized in that,
Have:  surveillance device, suction pressure, head pressure, inlet temperature, compressibility coefficient, gas mean molecule quantity, heat capacity ratio when the abovementioned fluid machinery of its measurement exclusive disjunction moves, and store this data;
WithThe central monitoring computer, it receives the abovementioned data that are stored in this surveillance device by network, Abovementioned central monitoring computer has the performance diagnogtics device of each described fluid machinery in the aforesaid right requirement 1～
3.
 surveillance device, suction pressure, head pressure, inlet temperature, compressibility coefficient, gas mean molecule quantity, heat capacity ratio when the abovementioned fluid machinery of its measurement exclusive disjunction moves, and store this data;
Specification(s)