Structure for improving start-up of reciprocating piston compressor

Abstract

The utility model discloses an improve and start structure of reciprocating piston compressor, relate to compressor starting technical field, including compressor main part, the high pressure cavity structure and cylinder cover structure of compressor main part's upper installation are provided with through -hole between high pressure cavity structure and cylinder cover structure, and through -hole and high pressure cavity structure and cylinder cover structure intercommunication setting, the inside of high pressure cavity structure is provided with connecting seat, and connecting seat and high pressure cavity structure fixed connection, the inside of high pressure cavity structure is provided with valve piece, be provided with connecting shaft between both sides of connecting seat of valve piece upper end, connecting shaft and connecting seat rotatory connection, this compressor increases valve piece structure through in cylinder seat high pressure cavity side, separates cylinder cover and high pressure cavity, forms two separate areas, and when high pressure cavity side exhaust pressure is little, valve piece is in the open and close state, until high pressure cavity side and cylinder cover side pressure, will not exist cylinder cover side pressure increase, influences the condition of starting.

Description

Technical Field

[0001] This utility model relates to the field of compressor starting technology, specifically to a structure for improving the starting of a reciprocating piston compressor. Background Technology

[0002] A reciprocating piston compressor is a positive displacement compressor that uses the reciprocating motion of a piston in a cylinder to compress gas. After the electric motor starts, it drives the crankshaft to rotate, which, through the connecting rod, causes the piston to reciprocate within the cylinder. When the piston begins to move from the cylinder head, the working volume inside the cylinder gradually increases, and the pressure decreases. When the pressure drops slightly below the gas pressure in the intake pipe, the gas pushes open the intake valve along the intake pipe and enters the cylinder until the working volume reaches its maximum, at which point the intake valve closes. When the piston moves in the opposite direction, the working volume inside the cylinder decreases, and the gas pressure increases. When the pressure inside the cylinder reaches and slightly exceeds the exhaust pressure, the exhaust valve opens, and the gas is discharged from the cylinder until the piston reaches its limit position, at which point the exhaust valve closes.

[0003] Fixed-frequency compressors commonly experience compressor stalling due to factors such as excessive exhaust pressure. To prevent this, we typically improve the compressor's structure or adjust the motor parameters. Common solutions include: increasing motor parameters and torque; reducing cylinder bore diameter to decrease the reverse force of exhaust pressure on the cylinder bore; increasing the connecting rod center distance to increase the axial force component of the cylinder bore; reducing exhaust end throttling to decrease exhaust pressure; and improving the housing refrigeration system and reducing refrigerant charge.

[0004] The existing compressor startup method improves the startup performance by improving motor parameters, but this increases costs. Due to the limitations of the compressor structure, reducing the cylinder bore diameter and increasing the connecting rod center distance are not feasible. Reducing the discharge end throttling will also affect the noise of the housing. Improving the housing and reducing the refrigerant charge will affect the cooling effect and reduce the startup performance of the reciprocating piston compressor, which cannot meet the usage requirements. Utility Model Content

[0005] The purpose of this utility model is to provide an improved structure for starting a reciprocating piston compressor, in order to solve the problems mentioned in the background art. The existing compressor starting methods improve the starting performance, but increasing the motor parameters increases costs. Due to the limitations of the compressor structure, reducing the cylinder bore diameter and increasing the connecting rod center distance cannot be achieved. Reducing the discharge end throttling will also affect the noise of the housing. Improving the housing and reducing the refrigerant charge will affect the cooling effect, thus reducing the starting performance of the reciprocating piston compressor and failing to meet the usage requirements.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a structure for improving the starting of a reciprocating piston compressor, comprising a compressor body, a high-pressure chamber structure and a cylinder head structure mounted on the compressor body, the high-pressure chamber structure and the cylinder head structure being integrally formed with the compressor body, a through hole being provided between the high-pressure chamber structure and the cylinder head structure, the through hole communicating with the high-pressure chamber structure and the cylinder head structure, a connecting seat being provided inside the high-pressure chamber structure, the connecting seat being fixedly connected to the high-pressure chamber structure, a valve plate being provided inside the high-pressure chamber structure, the valve plate being located on one side of the through hole, a connecting shaft being provided between the two sides of the upper end of the valve plate and the connecting seat, one end of the connecting shaft being fixedly connected to the valve plate, and the connecting shaft being rotatably connected to the connecting seat.

[0007] Preferably, a protruding seat is provided on the inner side of the valve plate, and the protruding seat is fixedly connected to the valve plate. The protruding seat is provided corresponding to the through hole, and the protruding seat is shaped like a frustum.

[0008] Preferably, a sealing ring is provided on the outside of the protrusion seat, and the sealing ring is integrated with the protrusion seat.

[0009] Preferably, a first pressure sensor is provided inside the cylinder head structure, and the first pressure sensor is connected to the cylinder head structure by screws.

[0010] Preferably, a second pressure sensor is provided inside the high-pressure chamber structure, and the second pressure sensor is connected to the high-pressure chamber structure by screws.

[0011] Preferably, the lower end of the compressor body is provided with an arc-shaped reinforcing rib, and the arc-shaped reinforcing rib is integral with the compressor body.

[0012] Preferably, the compressor body is provided with annular reinforcing ribs on its exterior, and the annular reinforcing ribs are integrally formed with the compressor body.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] 1. This utility model device, through the setting of a valve plate structure, isolates the cylinder head and the high-pressure chamber on the high-pressure side of the cylinder seat, forming two separate areas. When the exhaust pressure on the high-pressure chamber side is low, the valve plate is in the open / closed state, and high-pressure gas flows from the cylinder head side into the high-pressure chamber side. When the pressure on the high-pressure chamber side is greater than the pressure on the cylinder head side, a thrust is applied to the valve plate, and the valve plate is pressed tightly against the high-pressure chamber to play a sealing role. The high-pressure gas on the high-pressure chamber side cannot flow into the cylinder head side, reducing the pressure on the cylinder head side, so as to ensure that the exhaust pressure on the piston side is not higher than the pressure on the exhaust pipe side. The exhaust pressure on the cylinder head side is reduced, and the stall torque required for compressor startup is reduced, which can improve the start-up stall and improve the compressor startup. This structure can not only improve the start-up stall situation, but also has little impact on compressor noise, exhaust pressure, cooling capacity, etc.

[0015] 2. The utility model device uses a first pressure sensor and a second pressure sensor. The first pressure sensor measures the cylinder head side pressure, and the second pressure sensor measures the high pressure chamber side pressure, which facilitates real-time monitoring of the cylinder head side pressure and the high pressure chamber side pressure. Attached Figure Description

[0016] Figure 1 This is the front view of the present invention;

[0017] Figure 2 This is a cross-sectional view of section AA of the present invention;

[0018] Figure 3 This is a cross-sectional view of the present invention;

[0019] Figure 4 This is a perspective view of the valve plate of this utility model.

[0020] In the diagram: 1. Compressor body; 2. High-pressure chamber structure; 3. Cylinder head structure; 4. Valve plate; 5. First pressure sensor; 6. Second pressure sensor; 7. Arc-shaped reinforcing rib; 8. Annular reinforcing rib; 9. Through hole; 10. Protruding seat; 11. Sealing ring; 12. Connecting seat; 13. Connecting shaft. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0022] Please see Figure 1-4 This utility model provides an embodiment of an improved starting structure for a reciprocating piston compressor, comprising a compressor body 1, a high-pressure chamber structure 2 and a cylinder head structure 3 mounted on the compressor body 1, the high-pressure chamber structure 2 and the cylinder head structure 3 being integrally formed with the compressor body 1, a through hole 9 being provided between the high-pressure chamber structure 2 and the cylinder head structure 3, the through hole 9 being connected to the high-pressure chamber structure 2 and the cylinder head structure 3, a connecting seat 12 being provided inside the high-pressure chamber structure 2, the connecting seat 12 being fixedly connected to the high-pressure chamber structure 2, a valve plate 4 being provided inside the high-pressure chamber structure 2, the valve plate 4 being provided on one side of the through hole 9, a connecting shaft 13 being provided between the two sides of the upper end of the valve plate 4 and the connecting seat 12, one end of the connecting shaft 13 being fixedly connected to the valve plate 4, and the connecting shaft 13 being rotatably connected to the connecting seat 12.

[0023] In use: When the compressor is working normally, the compressed high-pressure gas flows into the cylinder head structure 3. At this time, the cylinder head side pressure is higher than the high-pressure chamber side pressure. The high-pressure gas exerts a thrust on the valve plate 4, and the valve plate 4 is in the open / closed state. The high-pressure gas flows from the cylinder head structure 3 into the high-pressure chamber structure 2 through the through hole 9, without affecting normal operation. When the high-pressure chamber side pressure is higher than the cylinder head side pressure, the valve plate 4 exerts a thrust, and the valve plate 4 blocks the through hole 9. The high-pressure gas in the high-pressure chamber structure 2 cannot flow into the cylinder head structure 3, reducing the cylinder head side pressure and improving compressor start-up.

[0024] Please see Figure 4 A protruding seat 10 is provided on the inner side of the valve plate 4, and the protruding seat 10 is fixedly connected to the valve plate 4. The protruding seat 10 is correspondingly provided with the through hole 9, and the protruding seat 10 is shaped like a frustum. A sealing ring 11 is provided on the outside of the protruding seat 10, and the sealing ring 11 is connected to the protruding seat 10 as a whole. The protruding seat 10 is inserted into the through hole 9, and the sealing ring 11 fills the gap between the protruding seat 10 and the through hole 9, thereby improving the sealing performance of the connection between the protruding seat 10 and the through hole 9.

[0025] Please see Figure 2 The cylinder head structure 3 is equipped with a first pressure sensor 5, which is connected to the cylinder head structure 3 by screws. The high pressure chamber structure 2 is equipped with a second pressure sensor 6, which is connected to the high pressure chamber structure 2 by screws. The first pressure sensor 5 measures the cylinder head side pressure, and the second pressure sensor 6 measures the high pressure chamber side pressure, which facilitates real-time monitoring of the cylinder head side pressure and the high pressure chamber side pressure.

[0026] Please see Figure 3 The lower end of the compressor body 1 is provided with an arc-shaped reinforcing rib 7, and the arc-shaped reinforcing rib 7 is integrated with the compressor body 1. The outside of the compressor body 1 is provided with an annular reinforcing rib 8, and the annular reinforcing rib 8 is integrated with the compressor body 1. The arc-shaped reinforcing rib 7 increases the structural strength of the bottom of the compressor, and the annular reinforcing rib 8 increases the structural strength of the outer layer of the compressor, which can withstand greater loads and improve the service life of the compressor.

[0027] Working principle: When the compressor is working normally, the compressed high-pressure gas flows into the cylinder head structure 3. At this time, the cylinder head side pressure is higher than the high-pressure chamber side pressure. The high-pressure gas exerts a thrust on the valve plate 4, and the valve plate 4 is in the open / closed state. The high-pressure gas flows from the cylinder head structure 3 into the high-pressure chamber structure 2 through the through hole 9 without affecting normal operation. When the high-pressure chamber side pressure is higher than the cylinder head side pressure, it exerts a thrust on the valve plate 4. The protrusion 10 is aligned with the through hole 9 and inserted. The valve plate 4 blocks the through hole 9, and the high-pressure gas in the high-pressure chamber structure 2 cannot flow into the cylinder head structure 3, reducing the cylinder head side pressure and improving compressor start-up. The first pressure sensor 5 measures the cylinder head side pressure, and the second pressure sensor 6 measures the high-pressure chamber side pressure, which facilitates real-time monitoring of the cylinder head side pressure and the high-pressure chamber side pressure.

[0028] The contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0029] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A structure for improving the starting of a reciprocating piston compressor, comprising a compressor body (1), characterized in that: The compressor body (1) is equipped with a high-pressure chamber structure (2) and a cylinder head structure (3), and the high-pressure chamber structure (2) and the cylinder head structure (3) are integrated with the compressor body (1). A through hole (9) is provided between the high-pressure chamber structure (2) and the cylinder head structure (3), and the through hole (9) is connected to the high-pressure chamber structure (2) and the cylinder head structure (3). A connecting seat (12) is provided inside the high-pressure chamber structure (2), and the connecting seat (12) is fixedly connected to the high-pressure chamber structure (2). A valve plate (4) is provided inside the high-pressure chamber structure (2), and the valve plate (4) is provided on one side of the through hole (9). A connecting shaft (13) is provided between the two sides of the upper end of the valve plate (4) and the connecting seat (12), and one end of the connecting shaft (13) is fixedly connected to the valve plate (4). The connecting shaft (13) is rotatably connected to the connecting seat (12).

2. The structure for improving the starting of a reciprocating piston compressor according to claim 1, characterized in that: The valve plate (4) is provided with a protrusion seat (10) on its inner side, and the protrusion seat (10) is fixedly connected to the valve plate (4). The protrusion seat (10) is provided in correspondence with the through hole (9), and the protrusion seat (10) is provided in the shape of a frustum.

3. The structure for improving the starting of a reciprocating piston compressor according to claim 1, characterized in that: A sealing ring (11) is provided on the outside of the protrusion seat (10), and the sealing ring (11) is connected to the protrusion seat (10) as a whole.

4. The structure for improving the starting of a reciprocating piston compressor according to claim 1, characterized in that: The cylinder head structure (3) is equipped with a first pressure sensor (5), and the first pressure sensor (5) is connected to the cylinder head structure (3) by screws.

5. The structure for improving the starting of a reciprocating piston compressor according to claim 1, characterized in that: The high-pressure chamber structure (2) is equipped with a second pressure sensor (6), and the second pressure sensor (6) is connected to the high-pressure chamber structure (2) by screws.

6. The structure for improving the starting of a reciprocating piston compressor according to claim 1, characterized in that: The lower end of the compressor body (1) is provided with an arc-shaped reinforcing rib (7), and the arc-shaped reinforcing rib (7) is integrated with the compressor body (1).

7. The structure for improving the starting of a reciprocating piston compressor according to claim 1, characterized in that: The compressor body (1) is provided with an annular reinforcing rib (8) on its exterior, and the annular reinforcing rib (8) is integrated with the compressor body (1).

Images