Fluid loop pump health state data acquisition test device

Abstract

The invention discloses a fluid loop pump health state data acquisition test device. The device comprises a fluid loop pump test piece; the movable test platform is provided with a test loop and a data acquisition box, the test loop is communicated with the fluid loop pump test piece and connected with the data acquisition box, the test loop is used for controlling the temperature and the flow of a working medium, and the data acquisition box is used for acquiring a temperature signal, a pressure signal and a flow signal; and the vibration sensor is arranged on the fluid loop pump test piece, is connected with the data acquisition box, and is used for detecting a vibration signal of the fluid loop pump test piece and acquiring the vibration signal through the data acquisition box. The test device realizes the collection of vibration signals, temperature signals, pressure signals and flow signals in the health state of the loop pump test piece, collects various, high-frequency and multi-position health state parameters in the test, constructs a health state data set of the fluid loop pump, and is favorable for guiding the on-orbit health state management work of the fluid loop pump of a spacecraft.

Description

Technical Field

[0001] The invention relates to the technical field of fault injection simulation test for spacecraft electromechanical products, and in particular to a fluid circuit pump health status data acquisition test device. Background Art

[0002] The smooth implementation of the on-orbit health status management of spacecraft fluid circuit pumps currently relies on on-orbit health status data monitoring and health status parameter threshold warning. The principle is to judge the on-orbit health status of the pump body based on whether the health status parameters collected by the sensors on the spacecraft fluid circuit pump exceed the failure threshold set by expert experience. Due to the limitations of spacecraft payloads, circuit interfaces, mechanical interfaces and downlink data, the number and types of sensors monitoring health status data are small, the collection frequency is low, the collection time is short, and the installation location is limited, which leads to low quality of telemetry data and makes it difficult to accurately characterize the on-orbit health status of spacecraft fluid circuit pumps. Moreover, the setting of the failure threshold mainly relies on expert experience, which may deviate from the health status parameters of the fluid circuit pump under actual failure on-orbit, resulting in the inability to achieve effective warning, which is not conducive to guiding the on-orbit health status management of spacecraft fluid circuit pumps. Summary of the invention

[0003] In view of the deficiencies in the prior art, the present invention designs a fluid circuit pump health status data acquisition test device, comprising: a fluid circuit pump test piece; a movable test platform, on which a test circuit and a data acquisition box are arranged, the inlet end of the test circuit is connected to the outlet end of the fluid circuit pump test piece, the outlet end of the test circuit is connected to the inlet end of the fluid circuit pump test piece, and the test circuit is connected to the data acquisition box, the test circuit is used to control the temperature and flow of the working fluid, and the data acquisition box is used to collect temperature signals, pressure signals and flow signals; a vibration sensor, installed on the fluid circuit pump test piece and connected to the data acquisition box, used to detect the vibration signal of the fluid circuit pump test piece, and collect the vibration signal through the data acquisition box.

[0004] Preferably, the test circuit includes: a low-temperature constant temperature bath for controlling the temperature of the working fluid; an inner circuit connected to the inlet end of the low-temperature constant temperature bath, connected to the outlet end of the fluid circuit pump test piece, and connected to a data acquisition box; an outer circuit connected to the outlet end of the low-temperature constant temperature bath, connected to the inlet end of the fluid circuit pump test piece, and connected to the data acquisition box.

[0005] Preferably, the low-temperature constant temperature bath comprises: a bath body, the inlet end of which is connected to the inner loop and used to store the loop working fluid; a temperature controller, which is arranged in the bath body and used to control the temperature of the working fluid in the bath body; a booster pump, which is arranged in the bath body and at the outlet end of the bath body and connected to the outer loop and used to control the flow of the working fluid in the bath body into the test loop.

[0006] Preferably, the inner loop includes a hydraulic sensor, a flow meter and a ball valve connected in sequence, wherein the hydraulic sensor and the flow meter are both connected to a data acquisition box; the ball valve is connected to the inlet end of the low-temperature constant temperature bath, and the hydraulic sensor is connected to the outlet end of the fluid circuit pump test piece; the hydraulic sensor is used to detect the pressure of the working fluid at the outlet end of the fluid circuit pump test piece, and the flow meter is used to detect the flow rate of the working fluid in the test circuit.

[0007] Preferably, the external circuit includes a ball valve, an exhaust valve, a temperature sensor and a hydraulic sensor connected in sequence, wherein the temperature sensor and the hydraulic sensor are both connected to a data acquisition box; the ball valve is connected to the outlet end of the low-temperature constant temperature bath, and the hydraulic sensor is connected to the inlet end of the fluid circuit pump test piece; the hydraulic sensor is used to detect the pressure of the working fluid at the inlet end of the fluid circuit pump test piece, and the temperature sensor is used to detect the temperature of the working fluid in the test circuit.

[0008] Preferably, it also includes: a test tool for installing a fluid circuit pump test piece.

[0009] Preferably, defective parts are arranged in the fluid circuit pump test piece, and the defective parts are used to replace intact parts.

[0010] Preferably, a mobile power supply assembly is also provided on the movable test platform, and the fluid circuit pump test piece, the test circuit, the data acquisition box and the vibration sensor are all connected to the mobile power supply assembly.

[0011] Preferably, it further comprises: a hose, which is used to connect the inlet end of the test circuit with the outlet end of the fluid circuit pump test piece, and the outlet end of the test circuit with the inlet end of the fluid circuit pump test piece.

[0012] Compared with the closest prior art, the beneficial effects of the present invention are:

[0013] 1. The vibration sensor of the present invention is installed on a fluid circuit pump test piece to realize the collection of vibration signals in the health status of the fluid circuit pump test piece, and the temperature and flow rate of the working fluid are controlled through the test loop to simulate the on-orbit state of the fluid circuit pump, and the temperature signal, pressure signal and flow rate signal are collected through the data acquisition box. In the test, a variety of high-frequency and multi-position health status parameters are collected to construct a fluid circuit pump health status data set, which is conducive to guiding the on-orbit health status management of the spacecraft fluid circuit pump.

[0014] 2. During the test, the test bench of the present invention can inject defective parts with different faults into the fluid circuit pump test piece, such as worn inner ring bearings and outer ring bearings of the fluid circuit pump, to measure the health status parameters of the fluid circuit pump under different health conditions, build a health status parameter data set, and achieve accurate setting of the failure threshold of the health status parameters of the fluid circuit pump, which is beneficial to guiding the on-orbit health status management of the spacecraft fluid circuit pump.

[0015] 3. The temperature controller in the low-temperature constant temperature bath cooperates with the temperature sensor set on the external circuit to control the temperature of the working fluid in the circuit, simulate the working fluid temperature state when the fluid circuit pump is on track, and thus achieve the simulation of the fluid circuit pump test piece in line with the actual state. By directly simulating the actual on-track temperature state of the working fluid flowing through the fluid circuit pump test piece, the thermal design part in the traditional fluid circuit is reduced.

[0016] 4. Connect the fluid circuit pump test piece to the test circuit through a hose to isolate the vibration of the fluid circuit pump test piece and avoid the influence of the pump body vibration of the fluid circuit pump test piece on the stability of the hydraulic sensor and pipeline structure. At the same time, connecting the fluid circuit pump test piece to the test circuit through a hose can also avoid the fluid circuit pump test piece end being directly connected to the test circuit, making it easy to install, connect and replace fluid circuit pump test pieces with different interfaces, thereby improving the test efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the fluid circuit pump health status data acquisition test device of the present invention.

[0018] Figure 2 It is a connection diagram of the fluid circuit pump health status data acquisition test device of the present invention.

[0019] Reference numerals:

[0020] 1- low temperature constant temperature bath, 2- movable test platform, 3- ball valve, 4- data acquisition box, 5- first mobile power supply, 6- second mobile power supply, 7- exhaust valve, 8- flow meter, 9- temperature sensor, 10- hydraulic sensor, 11- hose, 12- vibration sensor, 13- fluid circuit pump test piece, 14- test fixture. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0022] like Figure 1-Figure 2As shown, the present invention provides a fluid circuit pump health status data acquisition test device, including: a fluid circuit pump test piece 13; a movable test platform 2, on which a test circuit and a data acquisition box 4 are arranged, the test circuit inlet end is connected to the fluid circuit pump test piece 13 outlet end, the test circuit outlet end is connected to the fluid circuit pump test piece 13 inlet end, and the test circuit is connected to the data acquisition box 4, the test circuit is used to control the temperature and flow of the working fluid, and the data acquisition box 4 is used to collect temperature signals, pressure signals and flow signals; a vibration sensor 12, installed on the fluid circuit pump test piece 13 and connected to the data acquisition box 4, used to detect the vibration signal of the fluid circuit pump test piece 13, and collect the vibration signal through the data acquisition box 4. The vibration sensor 12 is installed on the fluid circuit pump test piece 13 to realize the vibration signal collection of the fluid circuit pump test piece 13 in the health state, and the temperature and flow rate of the working fluid are controlled through the test loop to simulate the on-orbit state of the fluid circuit pump, and the temperature signal, pressure signal and flow signal are collected through the data acquisition box 4. In the test, a variety of high-frequency and multi-position health status parameters are collected to construct a fluid circuit pump health status data set, which is conducive to guiding the on-orbit health status management of the spacecraft fluid circuit pump.

[0023] Preferably, the test circuit includes: a low-temperature constant temperature bath 1, used to control the temperature of the working fluid; an inner circuit, connected to the inlet end of the low-temperature constant temperature bath 1, connected to the outlet end of the fluid circuit pump test piece 13, and connected to the data acquisition box 4; an outer circuit, connected to the outlet end of the low-temperature constant temperature bath 1, connected to the inlet end of the fluid circuit pump test piece 13, and connected to the data acquisition box 4.

[0024] Preferably, the cryogenic constant temperature bath 1 includes: a bath body, the inlet end of which is connected to the inner loop and used to store the loop working fluid; a temperature controller, which is arranged in the bath body and used to control the temperature of the working fluid in the bath body; a booster pump, which is arranged in the bath body and at the outlet end of the bath body and connected to the outer loop and used to control the flow of the working fluid in the bath body into the test loop. The temperature controller in the cryogenic constant temperature bath 1 cooperates with the temperature sensor 9 arranged on the outer loop to control the temperature of the working fluid in the loop and simulate the temperature state of the working fluid when the fluid loop pump is on track, thereby achieving a simulation of the fluid loop pump test piece that fits the actual state. By directly simulating the actual on-track temperature state of the working fluid flowing through the fluid loop pump test piece, the thermal design part in the traditional fluid loop is reduced.

[0025] Preferably, the inner loop includes a hydraulic sensor 10, a flow meter 8 and a ball valve 3 connected in sequence, wherein the hydraulic sensor 10 and the flow meter 8 are both connected to the data acquisition box 4; the ball valve 3 is connected to the inlet end of the low-temperature constant temperature bath 1, and the hydraulic sensor 10 is connected to the outlet end of the fluid circuit pump test piece 13; the hydraulic sensor 10 is used to detect the pressure of the working fluid at the outlet end of the fluid circuit pump test piece 13, and the flow meter 8 is used to detect the flow rate of the working fluid in the test circuit.

[0026] Preferably, the external circuit includes a ball valve 3, an exhaust valve 7, a temperature sensor 9 and a hydraulic sensor 10 which are connected in sequence, wherein the temperature sensor 9 and the hydraulic sensor 10 are both connected to the data acquisition box 4; the ball valve 3 is connected to the outlet end of the low-temperature constant temperature bath 1, and the hydraulic sensor 10 is connected to the inlet end of the fluid circuit pump test piece 13; the hydraulic sensor 10 is used to detect the pressure of the working fluid at the inlet end of the fluid circuit pump test piece 13, and the temperature sensor 9 is used to detect the temperature of the working fluid in the test circuit.

[0027] Preferably, it further comprises: a test fixture 14 for mounting the fluid circuit pump test piece 13. The test fixture 14 has a certain weight and is used to fix the fluid circuit pump test piece to avoid vibration signal errors caused by shaking of the test piece.

[0028] Preferably, defective parts are provided in the fluid circuit pump test piece 13, and the defective parts are used to replace intact parts. During the test, the test bench can inject defective parts with different faults into the fluid circuit pump test piece, such as the inner ring wear bearing and outer ring wear bearing of the fluid circuit pump, to measure the health state parameters of the fluid circuit pump under different health states, build a health state parameter data set, and realize the accurate setting of the failure threshold of the health state parameters of the fluid circuit pump, which is conducive to guiding the on-orbit health state management of the spacecraft fluid circuit pump.

[0029] Preferably, a mobile power supply assembly is also provided on the movable test platform 2, and the fluid circuit pump test piece 13, the test circuit, the data acquisition box 4 and the vibration sensor 12 are all connected to the mobile power supply assembly. The mobile power supply assembly includes a first mobile power supply 5 and a second mobile power supply 6, one of which is used to power the fluid circuit pump, and the other is used to power some sensors. At the same time, the working voltage of the two mobile power supplies is adjustable, which is suitable for fluid circuit pump test pieces and sensors with different working voltages.

[0030] Preferably, it also includes: a hose 11, which is used to connect the inlet end of the test circuit with the outlet end of the fluid circuit pump test piece 13, and the outlet end of the test circuit is connected to the inlet end of the fluid circuit pump test piece 13. The fluid circuit pump test piece is connected to the test circuit through the hose, so as to isolate the vibration of the fluid circuit pump test piece and avoid the influence of the pump body vibration of the fluid circuit pump test piece on the stability of the hydraulic sensor and the pipeline structure. At the same time, connecting the fluid circuit pump test piece to the test circuit through the hose can also avoid the end of the fluid circuit pump test piece being directly connected to the test circuit, making it easy to install, connect and replace fluid circuit pump test pieces with different interfaces, thereby improving the test efficiency.

[0031] Preferably, the movable test platform 2 has 3 layers in total, which separate the components in the test device to meet the installation requirements of each component and the functional requirements of the circuit. A low-temperature constant temperature bath is placed on the top layer to create a height difference with the test piece and provide a pressure difference for the circuit working fluid; the data acquisition box and mobile power supply components are placed in the middle layer and isolated from the circuit to reduce the risk of water contact with live instruments, while facilitating sensor signal output, power supply and test piece power supply; the main circuit is arranged on the bottom layer. In addition, the movable test platform 2 is equipped with rollers to facilitate the mobile test device to conduct health status data collection tests in different scenarios.

[0032] Preferably, the data acquisition box has a maximum of 16 acquisition channels with a maximum sampling rate of 156kHz, and the acquired data can be stored in continuous, timed, threshold-triggered, etc. At the same time, the data acquisition box is equipped with independently developed spacecraft fluid circuit pump fault diagnosis and degradation prediction software, which can realize the integrated centralized collection, display, storage, data feature extraction, noise reduction, fault diagnosis, degradation prediction and spectrum analysis functions of multiple types of health status data.

[0033] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0034] In addition, the terms "above" and "below" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "above" and "below" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0035] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0036] In the present application, the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0037] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent substitution, improvement, etc. made within the spirit and principle of the present invention are included in the scope of the claims of the present invention to be approved.

Claims

1. A fluid circuit pump health status data acquisition test device, characterized in that: include: Fluid circuit pump test piece (13); A movable test platform (2) is provided with a test loop and a data acquisition box (4), wherein the inlet end of the test loop is connected to the outlet end of the fluid loop pump test piece (13), the outlet end of the test loop is connected to the inlet end of the fluid loop pump test piece (13), and the test loop is connected to the data acquisition box (4), the test loop is used to control the temperature and flow of the working fluid, and the data acquisition box (4) is used to collect temperature signals, pressure signals and flow signals; A vibration sensor (12) is installed on the fluid circuit pump test piece (13) and connected to the data acquisition box (4), and is used to detect a vibration signal of the fluid circuit pump test piece (13), and collect the vibration signal through the data acquisition box (4).

2. The fluid circuit pump health status data acquisition test device according to claim 1, characterized in that: The test circuit comprises: A low temperature constant temperature bath (1), used to control the temperature of the working fluid; An inner loop connected to the inlet end of the low-temperature constant temperature bath (1), connected to the outlet end of the fluid loop pump test piece (13), and connected to the data acquisition box (4); The external circuit is connected to the outlet end of the low-temperature constant temperature bath (1), connected to the inlet end of the fluid circuit pump test piece (13), and connected to the data acquisition box (4).

3. The fluid circuit pump health status data acquisition test device according to claim 2, characterized in that: The low temperature constant temperature bath (1) comprises: A tank body, the inlet end of which is connected to the inner loop and is used to store the loop working fluid; A temperature controller is arranged in the tank body and is used to control the temperature of the working medium in the tank body; A booster pump is arranged in the tank body and at the outlet end of the tank body, connected to the external circuit, and is used to control the flow of the working medium in the tank body into the test circuit.

4. The fluid circuit pump health status data acquisition test device according to claim 2, characterized in that: The inner circuit comprises a hydraulic sensor (10), a flow meter (8) and a ball valve (3) which are connected in sequence, wherein the hydraulic sensor (10) and the flow meter (8) are both connected to the data acquisition box (4); The ball valve (3) is connected to the inlet end of the low-temperature constant temperature bath (1), and the hydraulic pressure sensor (10) is connected to the outlet end of the fluid circuit pump test piece (13); The hydraulic sensor (10) is used to detect the pressure of the working fluid at the outlet end of the fluid circuit pump test piece (13), and the flow meter (8) is used to detect the flow rate of the working fluid in the test circuit.

5. The fluid circuit pump health status data acquisition test device according to claim 2, characterized in that: The external circuit comprises a ball valve (3), an exhaust valve (7), a temperature sensor (9) and a hydraulic sensor (10) which are connected in sequence, wherein the temperature sensor (9) and the hydraulic sensor (10) are both connected to the data acquisition box (4); The hydraulic pressure sensor (10) is connected to the inlet end of the fluid circuit pump test piece (13); The ball valve (3) is used to control the flow rate of the working fluid at the outlet end of the low-temperature constant temperature bath (1), the hydraulic sensor (10) is used to detect the pressure of the working fluid at the inlet end of the fluid circuit pump test piece (13), and the temperature sensor (9) is used to detect the temperature of the working fluid in the test circuit.

6. The fluid circuit pump health status data acquisition test device according to claim 1, characterized in that: Also includes: A test fixture (14) is used to install the fluid circuit pump test piece (13).

7. The fluid circuit pump health status data acquisition test device according to claim 1, characterized in that: Defective parts are arranged in the fluid circuit pump test piece (13), and the defective parts are used to replace intact parts.

8. The fluid circuit pump health status data acquisition test device according to claim 1, characterized in that: The movable test platform (2) is also provided with a mobile power supply assembly, and the fluid circuit pump test piece (13), the test circuit, the data acquisition box (4) and the vibration sensor (12) are all connected to the mobile power supply assembly.

9. The fluid circuit pump health status data acquisition test device according to any one of claims 1 to 8, characterized in that: Also includes: A hose (11) is used to connect the inlet end of the test circuit with the outlet end of the fluid circuit pump test piece (13), and the outlet end of the test circuit is connected with the inlet end of the fluid circuit pump test piece (13).

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