Anti-surge device of centrifugal compressor

Abstract

According to the anti-surge device of the centrifugal compressor, a compensation pipe is fixedly connected to an exhaust pipe of the compressor, a connecting pipe is arranged between the compensation pipe and an air inlet pipe of the compressor, a sleeve is arranged in the compensation pipe in a penetrating mode, and a spring is compressed between the sleeve and the end of the compensation pipe; a clamping block clamped with a sliding groove formed in the inner wall of the compensation pipe is fixedly connected to the outer wall of the sleeve, an obliquely-arranged sealing ring is fixedly connected to the outer wall of the sleeve, and an air outlet hole is formed in the outer wall of the sleeve. The sleeve is pushed by gas in the exhaust pipe to be screwed towards the end of the compensation pipe, so that the gas outlet hole and the connecting pipe which are formed in the two sides of the sealing ring in the initial state can be located on the same side of the sealing ring, communication of the exhaust pipe and the gas inlet pipe is achieved, and balance of the pressure of the exhaust pipe and the pressure of the gas inlet pipe is kept.

Description

Technical Field

[0001] The present application relates to the technical field of compressors, and in particular to an anti-surge device for a centrifugal compressor. Background Art

[0002] Surge is a significant threat to centrifugal compressors. Existing centrifugal compressors typically use a pressure sensor to detect deviations in outlet and inlet pressures, then use a controller to activate a pressure relief solenoid valve to release pressure and maintain balance. Under normal circumstances, compressors experience significant vibration, which can lead to failures in the sensor and pressure relief solenoid valve, preventing pressure relief. This lack of a backup pressure relief mechanism can lead to surge. Therefore, the inventors have proposed an anti-surge device for centrifugal compressors. Utility Model Content

[0003] The purpose of this application is to provide a centrifugal compressor anti-surge device, which can automatically relieve pressure to the inlet when the outlet pressure is high, thereby maintaining the balance of inlet and outlet pressures.

[0004] The embodiment of the present application is implemented as follows:

[0005] The present application provides an anti-surge device for a centrifugal compressor, which is fixedly connected to a compensating pipe on the exhaust pipe of the compressor, a connecting pipe is provided between the compensating pipe and the intake pipe of the compressor, a sleeve is passed through the interior of the compensating pipe, a spring is compressed between the sleeve and the end of the compensating pipe, a block is fixedly connected to the outer wall of the sleeve and is engaged with a slide groove formed on the inner wall of the compensating pipe, an obliquely arranged sealing ring is fixedly connected to the outer wall of the sleeve, and an air outlet is opened on the outer wall of the sleeve.

[0006] In this application, the gas in the exhaust pipe pushes the sleeve to rotate toward the end of the compensation pipe, so that the air outlet and the connecting pipe located on both sides of the sealing ring in the initial state can be located on the same side of the sealing ring, thereby realizing the conduction between the exhaust pipe and the intake pipe, thereby maintaining the pressure balance between the exhaust pipe and the intake pipe.

[0007] In an optional embodiment, the compensation pipe is arranged in parallel with the exhaust pipe.

[0008] In an optional embodiment, the compensation pipe is arranged vertically to the exhaust port of the exhaust pipe.

[0009] In an optional embodiment, a retaining ring is fixed inside the compensation tube.

[0010] In an optional embodiment, the retaining ring and the compensation tube are coaxially arranged.

[0011] In an optional embodiment, the slide groove extends helically along the axial direction of the compensation tube.

[0012] In an optional embodiment, a baffle is fixed inside the sleeve.

[0013] In an optional embodiment, the baffle is arranged perpendicular to the axis of the sleeve.

[0014] In an optional embodiment, the blocking block and the baffle are arranged on the same plane.

[0015] In an optional embodiment, the sealing ring and the air outlet are arranged between the baffle and the baffle ring. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The exemplary embodiments of the present application will be described in detail below with reference to the accompanying drawings. It should be understood that the embodiments described below are only used to explain the present application, rather than to limit the scope of the present application. In the accompanying drawings:

[0017] Figure 1 is a schematic diagram of a centrifugal compressor anti-surge device according to an embodiment of the present application;

[0018] Reference numerals:

[0019] 10. Compressor;

[0020] 20. Intake pipe;

[0021] 30. Exhaust pipe;

[0022] 40. Make up pipe;

[0023] 50. Connecting pipe;

[0024] 31. Exhaust port;

[0025] 41. Spring;

[0026] 42. Sleeve;

[0027] 43. retaining ring;

[0028] 44. Chute;

[0029] 45. Card block;

[0030] 46. ​​Sealing ring;

[0031] 47. Vent;

[0032] 48. Baffle. DETAILED DESCRIPTION

[0033] Example 1

[0034] See also Figure 1In this embodiment, the anti-surge device of the centrifugal compressor includes a compensation pipe 40 fixedly connected to the exhaust pipe 30 of the compressor 10, a connecting pipe 50 is provided between the compensation pipe 40 and the intake pipe 20 of the compressor 10, a sleeve 42 is passed through the interior of the compensation pipe 40, a spring 41 is compressed between the sleeve 42 and the end of the compensation pipe 40, a block 45 is fixedly connected to the outer wall of the sleeve 42 and engaged with the slide groove 44 formed on the inner wall of the compensation pipe 40, a sealing ring 46 is fixedly arranged at an angle on the outer wall of the sleeve 42, and an air outlet hole 47 is opened on the outer wall of the sleeve 42.

[0035] In this embodiment, the gas in the exhaust pipe 30 pushes the sleeve 42 to rotate toward the end of the compensation pipe 40, so that the air outlet 47 and the connecting pipe 50 located on both sides of the sealing ring 46 in the initial state can be located on the same side of the sealing ring 46, thereby realizing the conduction between the exhaust pipe 30 and the intake pipe 20, thereby maintaining the pressure balance between the exhaust pipe 30 and the intake pipe 20.

[0036] It should be noted that the compensating pipe 40 is coaxially arranged with the exhaust pipe 30, and the compensating pipe 40 is vertically arranged with the exhaust port 31 of the exhaust pipe 30. The compensating pipe 40 is arranged as a whole on the outside of the exhaust port 31. The left end of the compensating pipe 40 is closed, and an annular retaining ring 43 is fixed to the right end of the compensating pipe 40. The retaining ring 43 is coaxially arranged with the compensating pipe 40, and the retaining ring 43 is fixed as a whole to the inside of the compensating pipe 40.

[0037] In addition, the sleeve 42 as a whole is coaxially arranged with the compensation tube 40, and a disc-shaped baffle 48 is fixed inside the sleeve 42. The baffle 48 is arranged perpendicular to the axis of the sleeve 42. The baffle 48 divides the inner cavity of the sleeve 42 into two independent parts. The sleeve 42 is entirely passed through the interior of the compensation tube 40, and the sleeve 42 is restricted between the baffle ring 43 and the left end face of the compensation tube 40. A spring 41 is compressed between the left end face of the compensation tube 40 and the baffle 48. Under the push of the spring 41, the right end face of the sleeve 42 abuts against the baffle ring 43. This state is the initial state.

[0038] In addition, the slide groove 44 is formed on the inner wall of the compensation tube 40, and the slide groove 44 extends spirally along the axial direction of the compensation tube 40, and the block 45 is fixed to the outer wall of the sleeve 42. As an example, the block 42 and the baffle 48 are arranged on the same plane, and the block 42 can be slidably engaged with the inside of the slide groove 44. By utilizing the sliding engagement between the block 42 and the slide groove 44, the sleeve 42 as a whole can be rotated along the axial direction of the compensation tube 40. In the initial state, the slide groove 44 as a whole is arranged on the left side of the baffle 48.

[0039] The sealing ring 46 is fixedly connected to the outer wall of the sleeve 42 at an angle as a whole, that is, the axis of the sealing ring 46 and the axis of the sleeve 42 are kept at an angle, and the sealing ring 46 is clamped between the inner wall of the compensation tube 40 and the outer wall of the sleeve 42 to play a sealing role; the air outlet 47 is a through hole formed on the side wall of the sleeve 42, and the sealing ring 46 and the air outlet 47 are both arranged on the right side of the baffle 48, and the sealing ring 46 and the air outlet 47 are arranged between the baffle 48 and the retaining ring 43. In the initial state, the air outlet 47 is located on the right side of the inclined surface where the sealing ring 46 is located, and the connecting pipe 50 is located on the left side of the inclined surface where the sealing ring 46 is located.

[0040] When the pressure in the exhaust pipe 30 is greater than the pressure in the intake pipe 20, the gas in the exhaust pipe 30 pushes the sleeve 42 to rotate leftward inside the compensation pipe 40, so that the spring 41 is further compressed. When the sleeve 42 rotates leftward, it will drive the sealing ring 46 and the air outlet 46 to rotate synchronously, so that the air outlet 46 and the connecting pipe 50 are located on the same side of the sealing ring 46, so that the exhaust pipe 30 and the intake pipe 20 are connected. At this time, the gas inside the exhaust pipe 30 flows into the intake pipe 20 through the air outlet 46 and the connecting pipe 50 in turn, thereby achieving the purpose of automatic pressure relief.

[0041] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A centrifugal compressor anti-surge device, characterized in that: A compensating pipe is fixedly connected to the exhaust pipe of the compressor, a connecting pipe is provided between the compensating pipe and the intake pipe of the compressor, a sleeve is passed through the inside of the compensating pipe, a spring is compressed between the sleeve and the end of the compensating pipe, a block is fixedly connected to the outer wall of the sleeve and is engaged with a slide groove formed on the inner wall of the compensating pipe, an inclined sealing ring is fixedly connected to the outer wall of the sleeve, and an air outlet is opened on the outer wall of the sleeve.

2. The centrifugal compressor anti-surge device according to claim 1, characterized in that: The compensation pipe is arranged in parallel with the exhaust pipe.

3. The centrifugal compressor anti-surge device according to claim 2, characterized in that: The compensation pipe is arranged vertically to the exhaust port of the exhaust pipe.

4. The centrifugal compressor anti-surge device according to claim 3, characterized in that: A retaining ring is fixedly connected inside the compensation pipe.

5. The centrifugal compressor anti-surge device according to claim 4, characterized in that: The retaining ring and the compensating tube are arranged coaxially.

6. The centrifugal compressor anti-surge device according to claim 5, characterized in that: The slide groove extends in a spiral shape along the axial direction of the compensation pipe.

7. The centrifugal compressor anti-surge device according to claim 6, characterized in that: A baffle is fixedly connected inside the sleeve.

8. The centrifugal compressor anti-surge device according to claim 7, characterized in that: The baffle is arranged perpendicularly to the axis of the sleeve.

9. The centrifugal compressor anti-surge device according to claim 8, characterized in that: The clamping block and the baffle are arranged on the same plane.

10. The centrifugal compressor anti-surge device according to claim 9, characterized in that: The sealing ring and the air outlet are arranged between the baffle plate and the baffle ring.

Images