CN201225264Y - Clearance stepless adjusting device of piston reciprocating compressor - Google Patents

Abstract

The utility model relates to a stepless adjustment device for the clearance of a piston reciprocating compressor, which comprises a clearance volume cylinder (3), a clearance volume cylinder piston (301) arranged in the clearance volume cylinder (3), and a The power system of the clearance volume cylinder piston (301) and its control system; one end of the clearance volume cylinder (3) communicates with the outside cylinder (101) of the compressor cylinder (1) cylinder head. Advantages of the utility model device: the compressor can adjust the position of the clearance volume cylinder piston in the clearance volume cylinder through the power system and its control system according to the needs, thereby adjusting the clearance volume of the compressor cylinder, so that the output air volume of the compressor can be Stepless adjustment in a large range, good energy saving effect, simple operation, can continuously and automatically adjust the size of the clearance volume of the compressor, and keep the pressure of the output gas volume stable.

Description

Stepless clearance adjustment device for piston reciprocating compressor

technical field

The utility model relates to an air compressor, in particular to a piston reciprocating compressor, in particular to a clearance adjusting device used on the piston reciprocating compressor.

Background technique

As a process compressor, piston reciprocating compressors are widely used in the pillar industries of the national economy, such as petroleum and chemical industries. The rated displacement of the compressor is determined by the design, but in the process of chemical industry and oil refining, the displacement of the piston reciprocating compressor is required to be larger due to the change of the process flow, the change of the raw material type and the change of market demand. Stepless adjustment within the range.

At present, piston reciprocating air compressors generally adopt a bypass throttling adjustment method. Although this adjustment method is simple and reliable, the compressor is always working at full load, so the energy consumption is huge. In addition, this adjustment method is graded adjustment, the inter-stage pressure is difficult to control, and the gas pressure fluctuation range of the inlet pipe network is very large.

In order to overcome the above-mentioned defects, CN101029636A discloses a "reciprocating compressor clearance adjustment method", which uses the principle of partial stroke top opening intake valve adjustment (the intake valve is pushed back for a period of time after sucking the intake air to reach the specified It is an adjustment mechanism designed (using a hydraulic distributor to realize the control of opening the intake valve). This adjustment method has a good energy-saving effect and can realize stepless adjustment. However, due to the need to accurately calculate the time to open the intake valve, fast and high-frequency switching of actuator power, and fast response of actuators (milliseconds), so High demands are placed on both the controller and the solenoid valve.

Contents of the invention

The technical problem to be solved by the utility model is to provide a stepless adjustment device for the clearance of a piston reciprocating compressor. Simple.

The technical solution adopted by the utility model to solve the problems of the technologies described above is:

A stepless adjustment device for clearance of a piston reciprocating compressor, which includes a clearance volume cylinder, a clearance volume cylinder piston arranged in the clearance volume cylinder, a power system and a control system for driving the clearance volume cylinder piston;

One end of the clearance volume cylinder communicates with the cylinder outside the cylinder head of the compressor.

In the above scheme, the power system includes a hydraulic servo cylinder, a hydraulic servo cylinder piston arranged in the hydraulic servo cylinder, two hydraulic pipelines, a pump, and a connecting rod;

The two hydraulic pipelines communicate with the hydraulic servo cylinders on both sides of the piston of the hydraulic servo cylinder respectively, and the pump drives the piston of the hydraulic servo cylinder through the hydraulic pipelines;

One end of the hydraulic servo cylinder is connected to the other end of the clearance volume cylinder, and the piston of the hydraulic servo cylinder is connected to the piston of the clearance volume cylinder through a connecting rod.

In the above solution, the control system includes a servo reversing valve and its control mechanism for controlling the hydraulic direction in the hydraulic pipeline.

In the above scheme, the servo reversing valve is a mechanical servo reversing valve, and its control mechanism includes a servo cylinder, a servo cylinder piston arranged in the servo cylinder, an output air pressure pipeline, a set air pressure pipeline, and a connecting rod of the servo reversing valve; The servo cylinder drives the mechanical servo reversing valve through the connecting rod of the servo reversing valve;

The two air pressure pipelines communicate with the servo cylinders on both sides of the servo cylinder piston respectively; the other end of the output air pressure pipeline communicates with the output pipeline of the compressor.

In the above scheme, the servo reversing valve is an electromagnetic servo reversing valve, and its control mechanism includes a controller and a pressure sensor;

The pressure sensor is set in the output pipeline of the compressor, and its output end is connected with the controller;

The electromagnetic servo reversing valve is controlled by the controller.

In the above scheme, a valve is arranged on the hydraulic pipeline.

Compared with the prior art, the utility model device has the following advantages:

1. The clearance stepless adjustment device includes a clearance volume cylinder, a clearance volume cylinder piston set in the clearance volume cylinder, a power system and its control system for driving the clearance volume cylinder piston; one end of the clearance volume cylinder It communicates with the cylinder outside the cylinder head. The compressor can adjust the position of the clearance volume cylinder piston in the clearance volume cylinder through the power system and its control system according to the needs, so as to adjust the clearance volume of the compressor cylinder, so that the output air volume of the compressor can be within a large range With stepless adjustment, the energy-saving effect is good, the operation is simple, and the size of the clearance volume of the compressor can be continuously and automatically adjusted to keep the pressure of the output gas stable.

2. The power system includes a hydraulic servo cylinder. The piston of the clearance volume cylinder is driven by the hydraulic servo cylinder. The hydraulic servo cylinder responds quickly and has a simple structure. adjust.

3. The hydraulic servo cylinder can be controlled by the servo reversing valve, which is easy to control and operate.

4. The servo reversing valve is a mechanical servo reversing valve, and the mechanical servo reversing valve can be controlled by a servo cylinder, which is easy to control and operate, and has a simple structure.

5. The servo reversing valve is an electromagnetic servo reversing valve, and the electromagnetic servo reversing valve is controlled by the controller, which can also overcome the problems of untimely feedback and serious lag in adjustment in the past.

6. There is a valve on the hydraulic pipeline, which can be closed when there is no need to adjust the displacement of the compressor. When the reciprocating compressor is in the compression stroke, the hydraulic servo cylinder can withstand a large back pressure.

The structure of the stepless adjustment device for clearance of the utility model is simple, there is no need to redesign the existing piston reciprocating compressor, and the transformation is also very convenient. The device can be installed on the outer cylinder head of the compressor.

Description of drawings

Fig. 1 is a structural schematic diagram of a piston reciprocating compressor with a stepless adjustment device for clearance of the present invention

Fig. 2 is the working principle diagram of embodiment 1 of the utility model stepless adjustment device for clearance

Fig. 3 is the working principle diagram of embodiment 2 of the utility model stepless adjustment device for clearance

In the figure: 1—cylinder, 101—cylinder outside cylinder head, 102—cylinder inside cylinder head, 103—cylinder piston, 2—hydraulic lock valve, 3—clearance volume cylinder, 301—clearance volume cylinder piston, 4—hydraulic pressure Servo cylinder, 401—hydraulic servo cylinder piston, 402—hydraulic pipeline, 5—connecting rod, 6—electromagnetic servo reversing valve, 7—compressor output pipeline, 8—pump, 9—servo cylinder, 901—servo cylinder Piston, 902—output air pressure pipeline, 903—setting air pressure pipeline, 10—mechanical servo reversing valve, 11—servo reversing valve connecting rod, 12—controller, 13—pressure sensor.

Detailed ways

As shown in Figure 1, the piston reciprocating compressor with the utility model stepless adjustment device for clearance, the compressor includes a compressor output pipeline, four cylinders 1, and a cylinder piston 103 is arranged in the cylinder 1, and the cylinder piston 103 will The cylinder 1 is divided into a cylinder 101 outside the cylinder head and a cylinder 102 inside the cylinder head.

Embodiment 1 of the utility model stepless adjustment device for clearance as shown in Figures 1 and 2, it includes a clearance volume cylinder 3, a clearance volume cylinder piston 301 arranged in the clearance volume cylinder 3, and a clearance volume cylinder piston 301 for driving the clearance volume The power system of the displacement cylinder piston 301 and its control system.

The power system includes a hydraulic servo cylinder 4 , a hydraulic servo cylinder piston 401 arranged in the hydraulic servo cylinder 4 , two hydraulic pipelines 402 , a pump 8 , and a connecting rod 5 . The two hydraulic pipelines 402 communicate with the hydraulic servo cylinder 4 on both sides of the hydraulic servo cylinder piston 401 respectively, and the pump 8 drives the hydraulic servo cylinder piston 401 through the hydraulic pipeline 402 . One end of the clearance volume cylinder 3 communicates with the outer cylinder 101 of the cylinder head, one end of the hydraulic servo cylinder 4 is connected with the other end of the clearance volume cylinder 3 , and the hydraulic servo cylinder piston 401 is connected with the clearance volume cylinder piston 301 through the connecting rod 5 .

The control system includes a servo reversing valve and its control mechanism for controlling the hydraulic direction in the hydraulic pipeline 402 . The servo reversing valve is a mechanical servo reversing valve 10, and its control mechanism includes a servo cylinder 9, a servo cylinder piston 901 arranged in the servo cylinder 9, an output air pressure pipeline 902, a set air pressure pipeline 903, a servo reversing valve connection pole 11. The servo cylinder 9 drives the mechanical servo reversing valve 10 through the servo reversing valve connecting rod 11 . The two air pressure pipelines 902 communicate with the servo cylinders 9 on both sides of the servo cylinder piston 901 respectively; the other end of the output air pressure pipeline 902 communicates with the output pipeline 7 of the compressor.

The hydraulic pipeline 402 is provided with a valve, and the valve is a hydraulic lock valve 2 .

The working principle of Embodiment 1 of the utility model is as follows: both sides of the servo cylinder 9 are respectively connected with the compressor output pipeline 7 and the set air pressure pipeline 903 . When the actual pressure output by the compressor output pipeline 7 is lower than the set operating pressure, the servo cylinder 9 controls the mechanical servo reversing valve 10 to move to the left through the servo reversing valve connecting rod 11, and the pump 8 moves to the right of the hydraulic servo cylinder 4 The oil chamber is supplied with pressure oil, so that the piston 401 of the hydraulic servo cylinder moves to the corresponding left direction, and drives the piston of the clearance volume cylinder 3 to move to the left, reducing the clearance volume and increasing the output of the compressor. Similarly, when the actual pressure output by the compressor output line 7 is greater than the set operating pressure, the piston of the clearance volume cylinder 3 of the device moves to the right to increase the clearance volume and reduce the output of the compressor. The clearance stepless adjusting device of the utility model can continuously and automatically adjust the size of the clearance volume, thereby continuously and automatically adjusting the output volume of the compressor steplessly.

As shown in Figure 3, Embodiment 2 of the utility model stepless adjustment device for clearance is different from Embodiment 1 in that its servo reversing valve is an electromagnetic servo reversing valve 6, and its control mechanism includes a controller 12, The pressure sensor 13; the controller 12 is an industrial controller. The pressure sensor 13 is arranged in the output pipeline 7 of the compressor, and the pressure sensor 13 is arranged in the output pipeline 7 of the compressor, and its output end is connected with the controller 12 . The electromagnetic servo reversing valve 6 is controlled by a controller 12 .

Embodiment 2 of the utility model, the pressure sensor 13, the electromagnetic servo reversing valve 6, and the controller 12 form a fully automatic clearance automatic adjustment system. All control and adjustment are completed by the controller 12, the adjustment flexibility and precision are relatively high, and at the same time, the automatic monitoring of the operating room can be realized.

A displacement sensor for detecting the actual displacement of the hydraulic servo cylinder piston 401 can also be added to Embodiment 2 of the stepless adjustment device of the utility model, and the output end of the displacement sensor is connected with the controller 12 to reflect the stepless clearance of the utility model. The actual adjustment amount of the adjustment device.

Claims (6)

1, piston reciprocating compressor clearance stepless regulator is characterized in that: it comprises clearance volume cylinder (3), be arranged on clearance volume cylinder piston (301) in the clearance volume cylinder (3), be used to drive the power system and the control system thereof of clearance volume cylinder piston (301);

One end of clearance volume cylinder (3) and compresser cylinder (1) cylinder head outside cylinder (101) UNICOM.

2, clearance stepless regulator as claimed in claim 1 is characterized in that: power system comprises hydraulic servo cylinder (4), is arranged on hydraulic servo cylinder piston (401), two hydraulic pipe lines (402), pump (8), connecting rod (5) in the hydraulic servo cylinder (4);

Article two, hydraulic pipe line (402) respectively with hydraulic servo cylinder (4) UNICOM of hydraulic servo cylinder piston (401) both sides, pump (8) drives hydraulic servo cylinder piston (401) by hydraulic pipe line (402);

One end of hydraulic servo cylinder (4) is connected with the other end of clearance volume cylinder (3), and hydraulic servo cylinder piston (401) is connected with clearance volume cylinder piston (301) by connecting rod (5).

3, clearance stepless regulator as claimed in claim 2 is characterized in that: control system comprises servo selector valve and the control mechanism thereof that is used to control the interior hydraulic directio of hydraulic pipe line (402).

4, clearance stepless regulator as claimed in claim 3, it is characterized in that: servo selector valve is mechnical servo selector valve (10), and its control mechanism comprises servo cylinder (9), is arranged on servo cylinder piston (901), output pressure pipeline (902), setting pneumatic circuit (903), servo selector valve connecting rod (11) in the servo cylinder (9); Servo cylinder (9) is by the servo selector valve of servo selector valve connecting rod (11) driving device (10);

Article two, pneumatic circuit (902) respectively with servo cylinder (9) UNICOM of servo cylinder piston (901) both sides; The other end of output pressure pipeline (902) and compressor output pipe (7) UNICOM.

5, clearance stepless regulator as claimed in claim 3 is characterized in that: servo selector valve is electromagnetic servo selector valve (6), and its control mechanism comprises controller (12), pressure transducer (13);

Pressure transducer (13) is arranged in the compressor output pipe (7), and its output terminal is connected with controller (12);

Electromagnetic servo selector valve (6) is controlled by controller (12).

6, clearance stepless regulator as claimed in claim 2 is characterized in that: hydraulic pipe line (402) is provided with valve.

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