Conditions for starting electric pump unit

1987 ◽  
Vol 23 (12) ◽  
pp. 602-602
Author(s):  
B. F. Fedorov ◽  
N. A. Timakova ◽  
V. T. Kolesnikova
Keyword(s):  
Electric Pump ◽  
Pump Unit

scholarly journals Performance study of electric pump unit bearings of spacecraft thermal control systems

2020 ◽  
Vol 747 ◽  
pp. 012043
Author(s):  
N I Smirnov ◽  
N N Smirnov ◽  
M V Prozhega ◽  
S A Matveev ◽  
O V Shirobokov ◽  
...  
Keyword(s):  
Control Systems ◽  
Thermal Control ◽  
Electric Pump ◽  
Performance Study ◽  
Pump Unit ◽  
Spacecraft Thermal Control

scholarly journals Overview of electric pump units for spacecraft thermal control systems

2021 ◽  
Vol 5 (4) ◽  
pp. 198-207
Author(s):  
E. B. Korotkov ◽  
O. V. Shirobokov ◽  
S. A. Matveev ◽  
Z. A. Yudina
Keyword(s):  
Control Systems ◽  
Operating Experience ◽  
Thermal Control ◽  
Technical Condition ◽  
Operating Conditions ◽  
Electric Pump ◽  
Pump Unit ◽  
Brushless Dc ◽  
Long Lifetime ◽  
Pumping Units

The paper reports a brief description of spacecraft operating conditions, the main reasons of heating and thermal gradient appearance and need to reassign the thermal energy. Active thermal control systems and their advantages are considered, spacecraft for which the use of this type of thermal control systems is a priority. The electric pumping unit is pointed as a key unit of active thermal control systems. The electric pump unit is considered from the as the electromechanical system, its key elements are pointed. A description of the preferred pump types is reported and the types of active thermal control systems are briefly discussed. The foreign and domestic operating experience of spacecraft electric pumping units, the features of their designs are considered, the most common types of key elements are determined. Based on the results of the review, it is concluded that the most relevant layout of the electric pump unit is a centrifugal electrical pump with a brushless DC motor and hydrodynamic bearings. It is also indicated that the electric pump unit is a product with a long lifetime, which complicates the task of monitoring the technical condition in order to prevent failure.

Fail-Safe Control System for an Electric Pump Unit of Space Application

2021 ◽  
Vol 64 (2) ◽  
pp. 210-218
Author(s):  
S. A. Matveev ◽  
N. A. Testoedov ◽  
N. S. Slobodzyan ◽  
V. O. Goncharov ◽  
A. A. Kiselev ◽  
...  
Keyword(s):  
Control System ◽  
Electric Pump ◽  
Space Application ◽  
Pump Unit ◽  
Safe Control ◽  
Fail Safe

STATUS SYSTEM CLASSIFICATION OF ELECTRIC PUMP UNIT BASED ON THE DISCRIMINANT ANALYSIS

2017 ◽  
Vol 0 (33) ◽  
pp. 36-47
Author(s):  
Viktor Petrovych Rozen ◽  
Ivan Sharyi ◽  
Iryna Yakovchuk ◽  
Taras Yuriiovych Oboronov
Keyword(s):  
Discriminant Analysis ◽  
Electric Pump ◽  
Pump Unit

Submersible electric pump unit for lifting seawater

1976 ◽  
Vol 12 (9) ◽  
pp. 761-764
Author(s):  
B. V. Khimach
Keyword(s):  
Electric Pump ◽  
Pump Unit ◽  
Submersible Electric Pump

scholarly journals Protection of precision spacecraft equipment from internal sources of vibration

2021 ◽  
Vol 5 (4) ◽  
pp. 217-226
Author(s):  
Yu. A. Zhukov ◽  
E. B. Korotkov ◽  
S. A. Matveev ◽  
N. S. Slobodzyan ◽  
O. V. Shirobokov
Keyword(s):  
Vibration Isolation ◽  
Vibration Suppression ◽  
Thermal Control ◽  
Vibration Source ◽  
Electric Pump ◽  
Pump Unit ◽  
Isolation System ◽  
Vibration Isolators ◽  
Vibration Protection ◽  
Vibration Dampers

The work is devoted to the protection of a spacecraft from the influence of unacceptable internal vibration sources. The urgency of reducing the vibration activity on board the spacecraft to improve the accuracy of the target equipment is indicated. A particular problem of vibration protection of the spacecraft platform from a vibration source – an electric pump unit of a liquid thermal control system – is being solved. The basic requirements for electric pump unit vibration protection have been determined. Possible ways to reduce the level of vibration excited by the electric pump unit on the surface of the spacecraft fixation are considered. Particular attention is paid to such vibration protection methods as damping and vibration isolation, implemented by installing special vibration protection devices between the source (electric pump unit) and the object (spacecraft) – vibration isolators and vibration dampers. The principles of operation of vibration dampers and vibration isolators, the most common materials for vibration dampers are described. Examples of constructive solutions for linear single-axial vibration isolators are considered, recommendations for the use of promising products are developed. Particularemphasis is placed on the use of metal rubber as a material for vibration isolators. With regard to a specific design of electric pump unit, a diagram of the spatial structure of vibration isolation is proposed. Formulas for calculation are given in detail, a mathematical model of the vibration isolation system is developed. The procedure for calculating the parameters of the system has been formed. Based on the model, the maximum possible level of vibration suppression in the mid-frequency region was determined. Minimum required number of operable pixels was identified for monitoring the water surface with sufficient accuracy and reliability.

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