Test control device and method for simultaneously stabilizing main oil path pressure and branch oil path flow

Abstract

The invention discloses a test control device and method for simultaneously stabilizing the pressure of a main oil way and the flow of a branch oil way. Comprising a main oil way (1), and the outlet end of the main oil way (1) is connected with a branch oil way (2) needing flow control and a branch oil way (3) not needing flow control in parallel; and a proportional flow valve A (4) and a proportional flow valve B (5) are respectively arranged on the branch oil path (2) needing flow control and the branch oil path (3) not needing flow control. The test efficiency is high, the control method is stable and reliable, and the control effect is good.

Description

Technical Field

[0001] The invention belongs to the technical field of aviation pump tests, and in particular relates to a test control device and method for simultaneously stabilizing the main oil circuit pressure and branch oil circuit flow. Background Art

[0002] During the test, the aviation fuel pump needs to control fluid parameters such as pressure and flow. When it is necessary to control the pressure of the main oil circuit and the flow of the branch oil circuit, it is necessary to control the actuators of the main / branch oil circuits at the same time and cooperate with adjustments to position them. Due to the correlation changes between the main oil circuit and the branch oil circuit, adjustments are repeated, the adjustment cycle is long, and even adjustments cannot be made.

[0003] According to the previous practice, the actuator of the main / branch oil circuit adopts the manual adjustment of the mechanical ball valve mechanism, which has the following disadvantages: first, the adjustment is frequent, the workload is amazing, and it does not meet the long-life test requirements; second, the adjustment depends on the feel, and the adjustment cycle is unstable. In order to overcome the above technical problems, an attempt was made to adopt an automatic adjustment solution of the electric adjustment ball valve mechanism, but there are still problems such as "first, the adjustment cycle is long, and even the position cannot be locked; second, the algorithm is complicated, which is not conducive to engineering application", and the existing technical problems have not been fundamentally solved. Summary of the invention

[0004] The purpose of the present invention is to provide a test control device and method for stabilizing the main oil circuit pressure and branch oil circuit flow simultaneously. The present invention has high test efficiency, stable and reliable control method and good control effect.

[0005] The technical solution of the present invention is: a test control device for simultaneously stabilizing the main oil circuit pressure and the branch oil circuit flow, comprising a main oil circuit, wherein the outlet end of the main oil circuit is connected in parallel with a branch oil circuit that needs to control the flow and a branch oil circuit that does not need to control the flow; the branch oil circuit that needs to control the flow and the branch oil circuit that does not need to control the flow are respectively provided with a proportional flow valve A and a proportional flow valve B.

[0006] In the aforementioned test control device for stabilizing the main oil circuit pressure and the branch oil circuit flow simultaneously, the working range of the proportional flow valve A needs to cover the working flow of the branch oil circuit to be controlled.

[0007] In the aforementioned test control device for stabilizing the main oil circuit pressure and the branch oil circuit flow simultaneously, the working range of the proportional flow valve B needs to cover the maximum flow of the main oil circuit.

[0008] In the aforementioned test control device for simultaneously stabilizing the main oil circuit pressure and the branch oil circuit flow, a pressure sensor is provided on the main oil circuit.

[0009] In the aforementioned test control device for simultaneously stabilizing the main oil circuit pressure and the branch oil circuit flow, a mass flow meter A is provided on the main oil circuit.

[0010] In the aforementioned test control device for simultaneously stabilizing the main oil circuit pressure and the branch oil circuit flow, a mass flow meter B is provided at the outlet end of the proportional flow valve A.

[0011] In the aforementioned test control device for simultaneously stabilizing the main oil circuit pressure and the branch oil circuit flow, an oil filter is provided at the inlet end of the proportional flow valve B.

[0012] The control method of the aforementioned test control device for simultaneously stabilizing the main oil circuit pressure and the branch oil circuit flow rate is to first adjust the proportional flow valve A on the branch oil circuit that needs to control the flow so that the branch oil circuit that needs to control the flow reaches the required working flow; then adjust the proportional flow valve B on the branch oil circuit that does not need to control the flow so that the main oil circuit reaches the required working pressure.

[0013] The advantages of the present invention are: the present invention uses a proportional flow valve to achieve dual closed-loop control of the main oil circuit pressure and the branch oil circuit flow. Based on the characteristics of the proportional flow valve (its characteristics refer to Figure 2 ,Depend on Figure 2 It can be seen that when the pressure in front of the proportional flow valve is greater than a certain value, the flow tends to be stable). The present invention isolates the correlation between flow and pressure, and then realizes step-by-step adjustment. Only one parameter needs to be adjusted in each step, and the parameters that are simultaneously regulated are changed from two: flow and pressure to one parameter per step: first adjust the clamped flow, and then adjust the pressure (the flow rate no longer changes when the pressure is adjusted), thereby reducing the control difficulty.

[0014] The present invention only uses a proportional flow valve structure in double branches, thereby ensuring sufficient flow of the two branches and having a simple structure.

[0015] The control accuracy of the test control device of the present invention is still relatively stable after continuous operation for 1800 hours, and there is no decrease. However, the control accuracy of the traditional test control device will be reduced after continuous operation for about 100 hours, so the present invention works stably and reliably.

[0016] In summary, the present invention not only has a simple hardware configuration and extremely simple software programming, but also improves the efficiency and accuracy of test parameter adjustment. More importantly, it meets the test requirements of dual closed-loop pumps that can simultaneously stabilize the main oil circuit pressure and branch oil circuit flow. The traditional method requires simultaneous adjustment of the ball valves on the two branches, which is difficult to adjust because the two parameters of flow and pressure need to be controlled at the same time. It generally takes 5 to 10 minutes to adjust, and requires a high level of operator proficiency. If the operator does not have enough adjustment experience, it is easy to fail to adjust. The present invention is a step-by-step adjustment of "first adjust the proportional flow valve on the branch oil circuit that needs to control the flow to clamp the flow, and then adjust the proportional flow valve on the branch oil circuit that does not need to control the flow to control the pressure". Only one parameter is adjusted in each step, and the adjustment is easy. Generally, it only takes less than 10 seconds to complete the adjustment, and there is no requirement for operator experience. In addition, the adjustment accuracy of the present invention is 1% to 5%, while the traditional one is more than 20%. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a principle diagram of a double closed-loop pump test control device of the present invention that can simultaneously stabilize the main oil circuit pressure and branch oil circuit flow;

[0018] Figure 2 This is the flow-pressure characteristic of a certain type of proportional flow valve. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0020] The features and illustrative embodiments of various aspects of the present invention will be described in detail below. In the detailed description below, many specific details are proposed to provide a comprehensive understanding of the present invention. However, it is obvious to those skilled in the art that the present invention can be implemented without the need for some of these specific details. The following description of the embodiments is only to provide a better understanding of the present invention by illustrating examples of the present invention. The present invention is by no means limited to any specific settings and methods proposed below, but covers any improvements, replacements and modifications of structures, methods, devices without departing from the spirit of the present invention. In the accompanying drawings and the following description, known structures and technologies are not shown to avoid unnecessary ambiguity in the present invention.

[0021] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other, and the embodiments can refer to and quote each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0022] Example 1. A test control device for stabilizing the main oil circuit pressure and branch oil circuit flow simultaneously, see Figure 1 , including a main oil circuit 1, the outlet end of the main oil circuit 1 is connected in parallel with a flow control branch oil circuit 2 and a flow control non-control branch oil circuit 3; the flow control branch oil circuit 2 and the flow control non-control branch oil circuit 3 are respectively provided with a proportional flow valve A4 and a proportional flow valve B5. The proportional flow valves are all electric proportional flow valves.

[0023] The working range of the aforementioned proportional flow valve A4 needs to cover the working flow of the flow-controlled branch oil circuit 2. This ensures that the flow of the branch circuit can be controlled.

[0024] The working range of the aforementioned proportional flow valve B5 needs to cover the maximum flow of the main oil circuit 1. This ensures that when the flow of the main oil circuit 1 is at its maximum, it can flow out from the branch oil circuit 3 that does not require flow control in a timely manner.

[0025] The aforementioned main oil circuit 1 is provided with a pressure sensor 6 .

[0026] The aforementioned main oil circuit 1 is provided with a mass flow meter A7.

[0027] A mass flow meter B8 is provided at the outlet of the aforementioned proportional flow valve A4.

[0028] An oil filter 9 is provided at the inlet end of the aforementioned proportional flow valve B5.

[0029] The control method of the aforementioned test control device for simultaneously stabilizing the main oil circuit pressure and the branch oil circuit flow rate is to first adjust the proportional flow valve A4 on the branch oil circuit 2 that needs to control the flow, so that the branch oil circuit 2 that needs to control the flow reaches the required working flow; and then adjust the proportional flow valve B5 on the branch oil circuit 3 that does not need to control the flow, so that the main oil circuit 1 reaches the required working pressure.

[0030] Example 2. The proportional flow valve with a suitable working range in the present invention is selected based on the flow range and working pressure of the main oil circuit and branch oil circuit, ensuring that the pressure value in the oil circuit is greater than the normal working pressure of the proportional flow valve and that the flow selection range covers the required control range. Only install the electric proportional flow valve on the double branch oil circuit, see Figure 1 , the main oil circuit is not controlled.

[0031] The present invention proposes a double-closed-loop pump test control device which can simultaneously stabilize the main oil circuit pressure and the branch oil circuit flow, and gives an overall summary description of the method of the present invention.

[0032] The control method of the device may include the following steps:

[0033] 1. The host computer first inputs a given flow value to the proportional flow valve A4 on the flow branch oil circuit 2 to be controlled, so that the flow branch oil circuit 2 to be controlled can reach the required working flow first;

[0034] 2. The upper computer then inputs a given pressure range into the main oil circuit, and compares the measured pressure value with it. When the measured pressure value is greater than the given pressure range, the upper computer adjusts the proportional flow valve B5 on the branch oil circuit 3 that does not require flow control, so that the flow value of the branch oil circuit 3 that does not require flow control becomes larger. When the measured pressure value is less than the given pressure range, the upper computer adjusts the proportional flow valve B5 on the branch oil circuit 3 that does not require flow control, so that the flow value of the branch oil circuit 3 that does not require flow control becomes smaller. When the measured pressure value is within the given pressure range, the upper computer no longer adjusts the proportional flow valve B5.

[0035] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the field can easily think of various equivalent modifications or substitutions within the technical scope disclosed by the present invention, and these modifications or substitutions should all be covered within the protection scope of the present invention.

Claims

1. A test control device for stabilizing the main oil circuit pressure and branch oil circuit flow simultaneously, characterized in that: The invention comprises a main oil circuit (1), wherein a flow control branch oil circuit (2) and a flow control non-control branch oil circuit (3) are connected in parallel at the outlet end of the main oil circuit (1); a proportional flow valve A (4) and a proportional flow valve B (5) are respectively arranged on the flow control branch oil circuit (2) and the flow control non-control branch oil circuit (3).

2. The test control device for stabilizing the main oil circuit pressure and branch oil circuit flow rate simultaneously according to claim 1, characterized in that: The working range of the proportional flow valve A (4) needs to cover the working flow of the flow branch oil circuit (2) to be controlled.

3. The test control device for stabilizing the main oil circuit pressure and branch oil circuit flow simultaneously according to claim 1, characterized in that: The working range of the proportional flow valve B (5) needs to cover the maximum flow of the main oil circuit (1).

4. The test control device for stabilizing the main oil circuit pressure and branch oil circuit flow simultaneously according to claim 1, characterized in that: The main oil circuit (1) is provided with a pressure sensor (6).

5. The test control device for stabilizing the main oil circuit pressure and branch oil circuit flow simultaneously according to claim 1, characterized in that: The main oil circuit (1) is provided with a mass flow meter A (7).

6. The test control device for stabilizing the main oil circuit pressure and branch oil circuit flow rate simultaneously according to claim 1, characterized in that: A mass flow meter B (8) is provided at the outlet of the proportional flow valve A (4).

7. The test control device for stabilizing the main oil circuit pressure and branch oil circuit flow rate simultaneously according to claim 1, characterized in that: An oil filter (9) is provided at the inlet end of the proportional flow valve B (5).

8. A control method for a test control device for stabilizing the main oil circuit pressure and branch oil circuit flow simultaneously as claimed in any one of claims 1 to 7, characterized in that: First, the proportional flow valve A (4) on the flow-controlled branch oil circuit (2) is adjusted to make the flow-controlled branch oil circuit (2) reach the required working flow; then, the proportional flow valve B (5) on the flow-uncontrolled branch oil circuit (3) is adjusted to make the main oil circuit (1) reach the required working pressure.

Images