CN210180651U - Variable pump dry test device - Google Patents
Variable pump dry test device Download PDFInfo
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- CN210180651U CN210180651U CN201921059976.0U CN201921059976U CN210180651U CN 210180651 U CN210180651 U CN 210180651U CN 201921059976 U CN201921059976 U CN 201921059976U CN 210180651 U CN210180651 U CN 210180651U
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- way electromagnetic
- electromagnetic valve
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Abstract
The utility model discloses a variable pump dry test device, include: the device comprises a gas source, a pressure regulating valve, a proportional pressure reducing valve, a supercharger, an exhaust two-way electromagnetic valve, a gas storage tank, a gas flowmeter, a pressure sensor, an inflation two-way electromagnetic valve, a displacement sensor bracket, a displacement sensor and an electric control device; the components are sequentially connected in series through a pipeline; in the initial state, the exhaust two-way electromagnetic valve and the inflation two-way electromagnetic valve are closed; when the test is started, the gas test medium inflates the adjusting ring control pipeline; when the air pressure acting on the adjusting ring is larger than the supporting force of the adjusting ring spring on the adjusting ring spring, the adjusting ring starts to rotate around the pin shaft until the adjusting ring rotates to the end point; then the proportional pressure reducing valve reduces the air pressure of the control pipeline, and the adjusting ring returns until the adjusting ring resets when the air pressure acting on the adjusting ring is smaller than the supporting force of the adjusting ring spring on the adjusting ring; in the process, the displacement sensor detects and collects the displacement data of the whole process from the starting point to the end point and back to the starting point; the advantages are that: the dry test is accurate and the repeatability is very high.
Description
Technical Field
The utility model belongs to the technical field of oil pump and metering detection, and relates to a dry test method and a dry test device for a variable pump; in particular to a dry test method and a dry test device for a variable pump regulated by an adjusting ring, which are particularly suitable for detecting the working state of the adjusting ring of various blade variable pumps.
Background
The working state of the adjusting ring of the traditional variable displacement pump is detected by using hydraulic oil as a test medium, and under the conditions of calibrating test oil temperature, viscosity and rotating speed, whether the adjusting ring works normally is judged through rotating speed and flow curves.
The traditional oil type test method has high test cost and slow beat, oil is drained from a product after the test, oil residue exists in the product after the oil is drained in the test, the product is polluted to a certain extent, the cleanliness index of the product is not easy to reach, and the inconvenience is brought to storage, transportation and user assembly and use.
Disclosure of Invention
The utility model discloses a variable pump dry test method and device to solve the oil medium test in the prior art, experimental cost is high, the beat is slow, experimental back oil remains the scheduling problem.
The utility model discloses a test object variable pump comprises a variable pump shell, an adjusting ring, a pin shaft and an adjusting ring spring; the variable pump shell is provided with an adjusting ring control pipeline.
The utility model relates to a variable pump adjusting ring detects dry-type test device, include: the device comprises a gas source, a pressure regulating valve, a proportional pressure reducing valve, a supercharger, an exhaust two-way electromagnetic valve, a gas storage tank, a gas flowmeter, a pressure sensor, an inflation two-way electromagnetic valve, a displacement sensor bracket, a displacement sensor and an electric control device; the gas source, the pressure regulating valve, the proportional pressure reducing valve, the supercharger, the exhaust two-way electromagnetic valve, the gas storage tank, the gas flowmeter, the pressure sensor and the inflation two-way electromagnetic valve are sequentially connected in series through pipelines; the air inflation two-way electromagnetic valve is connected with a control pipeline of a test object variable pump adjusting ring; the proportional pressure reducing valve controls the pressurizing speed to ensure the accuracy and repeatability of detection; the supercharger and the air storage tank ensure that enough increased air charging amount is provided instantly in the test; the exhaust two-way electromagnetic valve is connected to a pipeline between the air storage tank and the proportional pressure reducing valve; the displacement sensor body is fixed on the displacement sensor bracket, and a measuring head of the displacement sensor is tightly pressed on the side surface of the adjusting ring to detect the displacement data of the adjusting ring at any time; the electric control device is electrically connected with the gas flowmeter, the pressure sensor, the inflation two-way electromagnetic valve, the exhaust two-way electromagnetic valve and the displacement sensor.
In the initial state, the adjusting ring is at the starting position, and the exhaust two-way electromagnetic valve and the inflation two-way electromagnetic valve are closed; the proportional pressure reducing valve stably regulates the pressure of the gas test medium passing through the pressure regulating valve to an initial pressure value, and a stable gas source is ensured to be supplied;
when the test is started, the inflation two-way electromagnetic valve is opened, and the gas source continuously inflates and pumps the gas test medium into the adjusting ring control pipeline; the gas test medium passing through the pressure regulating valve is accurately regulated in pressure by a proportional pressure reducing valve according to a certain speed ratio; continuously pressurizing the gas test medium output by the proportional pressure reducing valve to the gas storage tank through the supercharger; the gas test medium is inflated to an adjusting ring control pipeline of the variable pump of the test object through the gas storage tank, the gas flowmeter, the pressure sensor and the inflation two-way electromagnetic valve;
when the air pressure acting on the adjusting ring is larger than the supporting force of the adjusting ring spring on the adjusting ring, the adjusting ring starts to rotate around the pin shaft in the positive direction until the adjusting ring stops rotating, and the adjusting ring is located at the end point position; then the proportional pressure reducing valve reduces the air pressure of the control pipeline, and the adjusting ring returns to reset reversely when the air pressure acting on the adjusting ring is smaller than the supporting force of the adjusting ring spring on the adjusting ring until the adjusting ring stops rotating and reaches a reset point; in the process, the displacement sensor which is in close contact with the adjusting ring detects and collects displacement data of the whole process of the forward rotation stroke and the reverse rotation stroke of the adjusting ring, if the forward rotation stroke of the adjusting ring is equal to a set standard value and the displacement difference value between the forward rotation stroke and the reverse rotation stroke is zero, the adjusting ring operates normally, otherwise, the adjusting ring does not operate normally.
In addition, whether the clamping stagnation phenomenon exists can be judged through the maximum value of the inflation pressure, and the pressure value of the gas test medium detected by the pressure sensor is within the set upper and lower limit ranges, which indicates that the adjusting ring works normally; otherwise, the adjusting ring works abnormally; when the pressure value of the test medium exceeds the upper limit range, the adjusting ring of the variable pump of the test object has clamping stagnation; when the pressure value of the test medium exceeds the lower limit range, the rigidity of the adjusting ring spring is incorrect or the adjusting ring spring is neglected to be installed;
the gas flowmeter detects that the flow of a gas test medium is within the set upper and lower limit ranges, so that the adjustment ring and each component of the variable pump shell are correctly installed, and the exceeding of the upper and lower limit ranges indicates that parts are absent or the overall dimensions of the parts are out of tolerance in the installation process, so that the mistake proofing on an assembly line is realized.
After the adjusting ring is reset, the inflation two-way electromagnetic valve is closed, the exhaust two-way electromagnetic valve is opened, and a gas test medium in the test device is exhausted through the exhaust two-way electromagnetic valve; when the pressure value of the gas test medium detected by the pressure sensor is lower than the initial pressure value, the exhaust two-way electromagnetic valve is closed; the proportional pressure reducing valve adjusts and restores the pressure of the gas test medium to an initial pressure value, and the test is finished for the next test; ensuring the repeatability precision of the test.
The utility model discloses displacement sensor is the contraction type, and its gauge head closely presses the adjusting ring side through the small spring in inside, detects adjusting ring displacement data at any time.
The utility model also comprises a silencer; the silencer is connected with the exhaust two-way electromagnetic valve through a pipeline, and exhaust noise is eliminated.
The utility model has the advantages of: the detection of the dry test by the variable pump adjusting ring is accurate and the repetition precision is very high; the clamping or jamming of the adjusting ring, whether the parts are wrongly installed or not and whether the parts are neglected to be installed are easy to detect; the test method is simple, the cost is extremely low, the test period is short, the cleanliness index of the product is not influenced, the operation environment is good, and the transportation is convenient.
Drawings
FIG. 1 is a schematic structural view of the present invention;
fig. 2 is a schematic diagram of the displacement sensor for detecting the positions of the starting point and the resetting point of the adjusting ring of the variable displacement pump according to the present invention;
FIG. 3 is a schematic view of the displacement sensor detecting the end point position of the adjusting ring of the variable displacement pump according to the present invention;
in the figure: the device comprises a gas source 1, a pressure regulating valve 2, a proportional pressure reducing valve 3, a supercharger 4, an exhaust two-way electromagnetic valve 5, a silencer 6, a gas storage tank 7, a gas flowmeter 8, a pressure sensor 9, an inflation two-way electromagnetic valve 10, an adjusting ring control pipeline 11, an adjusting ring spring 12, a displacement sensor bracket 13, a displacement sensor 14, an adjusting ring 15, a variable pump shell 16 and a pin shaft 17.
Detailed Description
An embodiment of the present invention is described in detail below with reference to the accompanying drawings.
The variable pump of the utility model is shown in figure 2 and comprises a variable pump shell 16, an adjusting ring 15, a pin shaft 17 and an adjusting ring spring 12; the variable displacement pump housing has a control loop circuit 11.
The utility model relates to a variable pump adjusting ring detects dry-type test device embodiment is shown in figure 1, figure 2, include: the device comprises a gas source 1, a pressure regulating valve 2, a proportional pressure reducing valve 3, a supercharger 4, an exhaust two-way electromagnetic valve 5, a silencer 6, a gas storage tank 7, a gas flowmeter 8, a pressure sensor 9, an inflation two-way electromagnetic valve 10, a displacement sensor bracket 13, a displacement sensor 14 and an electric control device; the air source 1, the pressure regulating valve 2, the proportional pressure reducing valve 3, the supercharger 4, the exhaust two-way electromagnetic valve 5, the air storage tank 7, the gas flowmeter 8, the pressure sensor 9 and the inflation two-way electromagnetic valve 10 are sequentially connected in series through pipelines; the air-charging two-way electromagnetic valve 10 is connected with a control pipeline 11 of a test object variable pump adjusting ring; the proportional pressure reducing valve 3 controls the pressurization speed to ensure the accuracy and repeatability of detection; the supercharger 4 and the air storage tank 7 ensure that enough increased air charging amount is provided instantly in the test; the exhaust two-way electromagnetic valve 5 is connected on a pipeline between the air storage tank 7 and the proportional pressure reducing valve 3; the body of the displacement sensor 14 is fixed on the displacement sensor bracket 13, the displacement sensor 14 is of a contraction type, a measuring head of the displacement sensor 14 is tightly pressed on the side surface of the adjusting ring 15 through an internal tiny spring, and the displacement data of the adjusting ring is detected at any time; the electric control device is electrically connected with the gas flowmeter 8, the pressure sensor 9, the inflation two-way electromagnetic valve 10, the exhaust two-way electromagnetic valve 5 and the displacement sensor 14. The muffler 6 is connected with the exhaust two-way electromagnetic valve 5 through a pipeline, and exhaust noise is eliminated.
As shown in fig. 2: in the initial state, the adjusting ring is at the starting position, the exhaust two-way electromagnetic valve 5 and the inflation two-way electromagnetic valve 10 are closed, and the proportional pressure reducing valve 3 stably adjusts the pressure of the gas test medium passing through the pressure adjusting valve 2 to the initial pressure value, so that a stable gas source is ensured to be supplied.
When the test is started, the inflation two-way electromagnetic valve 10 is opened, and the gas source 1 continuously pumps gas test medium into the adjusting ring control pipeline 11; the gas test medium passing through the pressure regulating valve 2 is accurately regulated in pressure by a proportional pressure reducing valve 3 according to a certain speed ratio; the gas test medium output by the proportional pressure reducing valve 3 is continuously pressurized to the gas storage tank 7 through the supercharger 4; the gas test medium is inflated to an adjusting ring control pipeline 11 of the variable pump of the test object through a gas storage tank 7, a gas flowmeter 8, a pressure sensor 9, an inflation two-way electromagnetic valve 10.
As shown in fig. 3: when the air pressure acting on the adjusting ring 15 is larger than the supporting force of the adjusting ring spring 12 on the adjusting ring, the adjusting ring starts to rotate around the pin shaft 17 in the positive direction until the adjusting ring is positioned at the end position and stops rotating; then the proportional pressure reducing valve 3 reduces the air pressure of the control pipeline, when the air pressure acting on the adjusting ring 15 is smaller than the supporting force of the adjusting ring spring 12 on the adjusting ring, the adjusting ring 15 returns reversely until the adjusting ring stops rotating and reaches a reset point; in the process, the displacement sensor 14 in close contact with the adjusting ring 15 simultaneously detects and collects displacement data of the whole process of the forward rotation stroke and the reverse rotation stroke of the adjusting ring, if the forward rotation stroke of the adjusting ring is equal to a set standard value and the displacement difference value with the reverse rotation stroke is zero, the adjusting ring 15 operates normally, otherwise, the adjusting ring is abnormal.
In addition, whether the clamping stagnation phenomenon exists can be judged through the maximum value of the inflation pressure, and the pressure value of the gas test medium detected by the pressure sensor 9 is within the set upper and lower limit ranges, which indicates that the adjusting ring 15 works normally; otherwise, the adjusting ring works abnormally; when the pressure value of the test medium exceeds the upper limit range, the variable pump adjusting ring 15 of the test object has clamping stagnation; when the pressure value of the test medium exceeds the lower limit range, the rigidity of the adjusting ring spring 12 is incorrect or the adjusting ring spring 12 is neglected to be installed.
The gas flowmeter detects that the flow of the gas test medium is within the set upper and lower limit ranges, which indicates that each component of the adjusting ring 15 and the variable pump shell 16 is correctly installed, and the exceeding of the set upper and lower limit ranges indicates that no part is available or the external dimension of the part is out of tolerance in the installation process, thereby realizing the mistake proofing on the assembly line.
After the adjusting ring 15 is reset, the inflation two-way electromagnetic valve 10 is closed, and the exhaust two-way electromagnetic valve 5 is opened; the gas test medium in the test device is exhausted through the exhaust two-way electromagnetic valve, when the pressure value of compressed air detected by the pressure sensor 9 is lower than the initial pressure value, the exhaust two-way electromagnetic valve 5 is closed, the proportional pressure reducing valve 3 adjusts and restores the pressure of the gas test medium to the initial pressure value, and the test is finished for the next test; ensuring the repeatability precision of the test.
Claims (1)
1. The utility model provides a variable pump dry test device which characterized in that: the device comprises a gas source, a pressure regulating valve, a proportional pressure reducing valve, a supercharger, an exhaust two-way electromagnetic valve, a gas storage tank, a gas flowmeter, a pressure sensor, an inflation two-way electromagnetic valve, a displacement sensor bracket, a displacement sensor and an electric control device; the gas source, the pressure regulating valve, the proportional pressure reducing valve, the supercharger, the exhaust two-way electromagnetic valve, the gas storage tank, the gas flowmeter, the pressure sensor and the inflation two-way electromagnetic valve are sequentially connected in series through pipelines; the air inflation two-way electromagnetic valve is connected with a control pipeline of a test object variable pump adjusting ring; the proportional pressure reducing valve controls the pressurizing speed to ensure the accuracy and repeatability of detection; the supercharger and the air storage tank ensure that enough increased air charging amount is provided instantly in the test; the exhaust two-way electromagnetic valve is connected to a pipeline between the air storage tank and the proportional pressure reducing valve; the displacement sensor body is fixed on the displacement sensor bracket, and a measuring head of the displacement sensor is tightly pressed on the side surface of the adjusting ring to detect the displacement data of the adjusting ring at any time; the electric control device is electrically connected with the gas flowmeter, the pressure sensor, the inflation two-way electromagnetic valve, the exhaust two-way electromagnetic valve and the displacement sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921059976.0U CN210180651U (en) | 2019-07-09 | 2019-07-09 | Variable pump dry test device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921059976.0U CN210180651U (en) | 2019-07-09 | 2019-07-09 | Variable pump dry test device |
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| CN210180651U true CN210180651U (en) | 2020-03-24 |
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| CN201921059976.0U Active CN210180651U (en) | 2019-07-09 | 2019-07-09 | Variable pump dry test device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112483882A (en) * | 2020-12-16 | 2021-03-12 | 福州大学 | Life buoy inflation detection device and method |
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2019
- 2019-07-09 CN CN201921059976.0U patent/CN210180651U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112483882A (en) * | 2020-12-16 | 2021-03-12 | 福州大学 | Life buoy inflation detection device and method |
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