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Load increasing and reducing device of air compressor

A technology of air compressors and load devices, which is applied in the direction of mechanical equipment, machines/engines, liquid variable capacity machines, etc. It can solve problems such as inflexibility, inability to obtain airtightness, and inability to know the performance of components, so as to improve the rationality Effect

Active Publication Date: 2011-03-09
WEICHAI POWER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] It can be seen from the above description of the prior art that in the prior art, the test system connected once can only test the air compressor at the calibration pressure, so the executable test pressure is fixed and cannot be adjusted, which is very inflexible. not widely adaptable
In particular, for an air compressor without an unloading valve, in order to test the performance of the air compressor at different pressures, it is necessary to replace the unloading valve 4 with a different calibration pressure, which is inconvenient and due to frequent Parts need to be replaced and good airtightness cannot be obtained, which affects the accuracy of air compressor performance testing
Correspondingly, for an air compressor with an unloading valve itself, since the calibrated pressure threshold of the unloading valve is already fixed when it is produced, the load can only be added or subtracted at this fixed pressure, and it cannot be realized in the air compressor. Addition and subtraction load experiments at other pressures
In addition, using the above method in the prior art, the test personnel will not be able to know whether the performance of each component is normal, such as the working status of each valve, whether it is aging and malfunctioning, etc. These reasons will also cause inaccurate test results and even bring serious safety hazards. Hidden danger

Method used

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  • Load increasing and reducing device of air compressor
  • Load increasing and reducing device of air compressor
  • Load increasing and reducing device of air compressor

Examples

Experimental program
Comparison scheme
Effect test

no. 1 example

[0047] image 3 It is a structural schematic diagram illustrating a device for automatically adding or subtracting loads to an air compressor without an unloading valve according to an embodiment of the present invention. First, the gas compressed by the air compressor 1 without unloading valve is dried by the dryer 2 to effectively prevent water and oil from entering the pipeline and reduce problems such as pipeline blockage, and the dryer also has a pressure adjustment function to Keep the passing gas at a stable pressure; then the pressure sensor 10 and temperature sensor 11 respectively collect the pressure and temperature measurements of the gas in the pipeline; then, the pipeline is divided into three links, where the gas medium is divided into two paths , all the way to one end of the solenoid valve 3, the other end of the solenoid valve 3 is open to the atmosphere, and the control end of the solenoid valve 3 is connected to the control unit 14 to set the pressure thres...

no. 2 example

[0050] Figure 4 It is a structural schematic diagram illustrating a device for automatically loading and unloading an air compressor with an unloading valve according to an embodiment of the present invention. and image 3 In contrast, the same or similar components are denoted by the same reference numerals and their corresponding repeated descriptions are omitted. The second embodiment differs from the first embodiment in the following points:

[0051] one, Figure 4 The air compressor 1 in the device is an air compressor with an unloading valve, when the unloading valve is at a pressure below the calibrated pressure threshold, the unloading valve is closed, and the air compressor works with load; and when the unloading valve When the valve is at or above the calibrated pressure threshold, the unloading valve opens and the air compressor works without load.

[0052] two, Figure 4 The device does not have a solenoid valve 3 so that the air compressor is not automatical...

no. 3 example

[0056] Figure 5 It shows the air compressor loading and unloading device according to the third embodiment of the present invention, which can be used for both the air compressor without unloading valve and the air compressor with unloading valve. Please note that in conjunction with the above image 3 and Figure 4 The illustrated first embodiment corresponds to the second embodiment, the same or corresponding technical features are denoted by the same reference numerals, and their repeated descriptions are omitted. From this it can be seen that Figure 5 The shown air compressor loading and unloading device includes both the solenoid valve 3 and the solenoid valve 7, so the automatic and flexible loading and unloading can be realized for both the air compressor without an unloading valve and the air compressor with an unloading valve.

[0057] During the normal test process, when the air compressor is working with load, the solenoid valve 3 is closed, the pressure of the...

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PUM

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Abstract

The invention provides a load increasing and reducing device of an air compressor, which comprises a connector, an air storage tank, a first solenoid valve, a second solenoid valve and a control unit, wherein the connector is used for connecting an outlet of the air compressor; the air storage tank is connected with the connector by a pipe; one end of the first solenoid valve is connected with the pipe, and the other end of the first solenoid valve is connected to the air outside; one end of the second solenoid valve is connected to the air storage tank; and the control unit is connected with a control end of the first solenoid valve and a control end of the second solenoid valve, and used for controlling the pressure thresholds of the first solenoid valve and the second solenoid valve. The device can carry out load increasing and reducing on the air compressor automatically, flexibly and precisely in an endurance test.

Description

technical field [0001] The present invention relates to the field of performance testing for air compressors and in particular, but not limited to, an apparatus for use in air compressor duty cycle testing. Background technique [0002] The air compressor is the main body of the air source device. It is a device that converts the mechanical energy of the prime mover (usually a motor) into gas pressure energy, and is a pressure generating device for compressing air. Air compressors can be divided into positive displacement compressors, reciprocating compressors, and centrifugal compressors according to their working principles. The working principle of the positive displacement compressor is to compress the volume of the gas, so that the density of the gas molecules in the unit volume is increased to increase the pressure of the compressed air; the working principle of the centrifugal compressor is to increase the movement speed of the gas molecules, so that the kinetic energ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04B51/00
Inventor 谭旭光孙少军李亚东衣波龙赵凯华
Owner WEICHAI POWER CO LTD