Cylinder sleeve for piston compressor and piston compressor

Abstract

The cylinder sleeve for the piston compressor is characterized in that the cylinder sleeve for the piston compressor comprises a cylinder sleeve body installed on a compressor body, the center of the cylinder sleeve body is provided with a cylindrical piston cavity used for guiding lifting of a piston, and the port of the cylinder sleeve body is provided with a buffering cavity extending outwards. The cylinder sleeve for the piston compressor and the piston compressor are beneficial to stabilizing temperature and pressure states of gas in the cylinder, so that a compressor gas valve and a piston ring are prevented from being damaged, and economic loss is reduced.

Description

TECHNICAL FIELD

[0001] The utility model belongs to piston compressor field, especially involve a kind of cylinder sleeve structure and use the piston compressor of this kind of cylinder sleeve for piston compressor. BACKGROUND

[0002] At present, for piston compressor, when piston reciprocates in cylinder sleeve, temperature and pressure in cylinder sleeve will produce violent alternate change, and sharply changing temperature and pressure are easy to cause the fracture of gas valve (exhaust valve or suction valve) in cylinder sleeve, and cause piston ring to be stuck;Therefore, stabilizing temperature and pressure in cylinder is an important prerequisite to ensure the stable operation of compressor.

[0003] At present, search Chinese patent "compressor same stage cylinder temperature difference control device" announcement number CN202431493U, the device is provided with one temperature transmitter TT at each cylinder exhaust port of compressor same stage, each temperature transmitter TT is correspondingly connected with AI module of programmable controller, the patent installs temperature transmitter at each cylinder exhaust port of same stage, carries out temperature detection, and the problem cylinder is detected in time by processing in PLC program, early warning or shutdown, applicable to the control design of reciprocating piston compressor with same stage cylinder, improves equipment operation reliability and other advantages;But the patent completely relies on electronic component detection and control compressor operation stability, not only high manufacturing cost, but also poor service life and stability.

[0004] In addition, search Chinese patent "a compressor control method, device, system and storage medium", publication number CN112460771A, when compressor stops, the compressor control method adjusts the high and low pressure of the entire temperature control system to balance the high and low pressure of the temperature control system, and after the high and low pressure is balanced, the power that rotates the compressor rotor to the preset position is applied to the compressor rotor, and when the relative deviation of the position of the compressor rotor under the action of the power is less than the preset deviation value, the position information of the compressor rotor is recorded, so that when the temperature control system is started again, the position information of the stored compressor rotor is directly obtained to start the compressor, reduce the difficulty of starting the compressor, and realize the rapid opening of the temperature control system;The patent is also completely dependent on electronic component detection and control compressor operation stability, not only high manufacturing cost, but also poor service life and stability. SUMMARY

[0005] In view of the deficiencies of the prior art, the utility model aims at providing a piston compressor cylinder sleeve and piston compressor, which is beneficial to stabilize the temperature and pressure state of gas in the cylinder, thereby preventing the damage of compressor valve and piston ring and reducing economic loss.

[0006] The utility model discloses a technical scheme that solves the above technical problems is:

[0007] The utility model discloses a piston compressor cylinder liner, its characterized in that: including installing on the cylinder liner body of compressor body, the centre of cylinder liner body has the piston cavity of the cylindrical for the piston lift direction, the port of cylinder liner body is equipped with the buffer cavity of outward expansion.

[0008] Preferably, the buffer cavity is arranged along the entire circumferential direction of the cylinder liner body to facilitate gas diffusion.

[0009] Preferably, one wall surface of the buffer cavity is a horn-shaped conical surface located at the port of the cylinder liner body and connected with the wall surface of the piston cavity.

[0010] Preferably, the horn-shaped conical surface forms an angle of 50-65 degrees with the axial line of the piston cavity.

[0011] Preferably, the outer peripheral wall of the cylinder liner body is in a stepped shape.

[0012] The utility model discloses a piston compressor, including compressor body and being located in the cylinder liner body of compressor body, the cylinder liner body has the piston cavity for the piston lift activity of direction, the valve plate of having exhaust valve and suction valve is equipped on the compressor body, and the lower surface of valve plate is in contact with the piston cavity, and its characterized in that: the inner wall surface of cylinder liner body port, the outer wall surface of piston and the end surface of valve plate form the buffer cavity when the piston in the cylinder liner body moves to the top dead center position.

[0013] Preferably, the buffer cavity is arranged along the entire circumferential direction of the cylinder liner body to facilitate gas diffusion.

[0014] Preferably, one wall surface of the buffer cavity is a horn-shaped conical surface located at the port of the cylinder liner body and connected with the wall surface of the piston cavity.

[0015] Preferably, the horn-shaped conical surface forms an angle of 50-65 degrees with the axial line of the piston cavity.

[0016] Preferably, the outer peripheral wall of the cylinder liner body is in a stepped shape and is assembled with the compressor body to form an integral whole.

[0017] The piston compressor cylinder liner is provided with a buffer cavity 8 on the port of the cylinder liner body 4, and the buffer cavity 8 is formed by the material removal part of the cylinder liner port (or the top of the cylinder liner) and the valve plate after the cylinder liner and the valve plate of the piston compressor are assembled, and the buffer cavity 8 is formed on the top of the cylinder liner body 4 and extends to the whole circumference of the cylinder liner body, so that the diffusion of the gas is facilitated. BRIEF DESCRIPTION OF DRAWINGS

[0018] The utility model is further explained below in combination with the drawings and examples.

[0019] Figure 1 It is the three-dimensional structure schematic diagram of cylinder liner;

[0020] Figure 2 It is the section structure schematic diagram of cylinder liner;

[0021] Figure 3 、 4 It is the partial structure schematic diagram of another embodiment of cylinder liner;

[0022] Figure 5 It is the section structure schematic diagram of piston movement to lower end point in compressor body;

[0023] Figure 6 It is the section structure schematic diagram of piston movement to upper end point in compressor body;

[0024] In the drawing: 1. exhaust valve, 2. suction valve, 3. valve plate, 4. cylinder liner, 5. compressor body, 6. piston, 7. piston cavity, 8. buffer cavity, 9. horn-shaped conical surface. DETAILED DESCRIPTION

[0025] The piston compressor cylinder liner of the utility model includes cylinder liner body 4 installed on compressor body 1, the center of the cylinder liner body has piston cavity 7 for piston lifting direction, the port of cylinder liner body 4 is equipped with the buffer cavity 8 that extends outward, namely the top of cylinder liner body 4 is equipped with the buffer cavity 8 that extends outward, the buffer cavity 8 is set in the whole circumference direction or the circumference partial of cylinder liner body, namely the buffer cavity 8 extends to the whole circumference or partial of cylinder liner body, wherein the buffer cavity 8 extends to the whole circumference of cylinder liner body preferably, so that the diffusion of the gas is facilitated.

[0026] One wall of the buffer cavity is a horn-shaped conical surface 9 located at the port of the cylinder sleeve body and connected with the wall of the piston cavity, the horn-shaped conical surface 9 forms an angle of 50-65 degrees with the axis of the piston cavity, of course, the wall of the buffer cavity can also be an arc surface, a spherical surface or a stepped surface (such as Figures 3-4 ), etc.

[0027] The outer circumferential wall of the cylinder sleeve body is stepped, and the cylinder sleeve body and the compressor body 1 can be fixed by interference fit.

[0028] The piston compressor of the utility model, including compressor body 1 and cylinder sleeve body 4 arranged in the compressor body, the cylinder sleeve body has piston cavity 7 for guiding the lifting movement of the piston, the compressor body is provided with valve plate 3 with exhaust valve 1 and suction valve 2, the lower surface of valve plate 3 is in abutment with piston cavity 7, the inner wall surface (i.e. horn-shaped conical surface 9) of the port of the cylinder sleeve body, the outer wall surface of the piston and the end surface of the valve plate form buffer cavity 8 when the piston in the cylinder sleeve body moves to the top dead center position.

[0029] The buffer cavity 8 is arranged in the whole circumferential direction or the local circumferential direction of the cylinder sleeve body, that is, the buffer cavity 8 extends to the whole circumference or the local circumference of the cylinder sleeve body, and preferably, the buffer cavity 8 extends to the whole circumference of the cylinder sleeve body, so that the diffusion of gas is facilitated.

[0030] One wall of the buffer cavity is a horn-shaped conical surface 9 located at the port of the cylinder sleeve body and connected with the wall of the piston cavity, the horn-shaped conical surface 9 forms an angle of 50-65 degrees with the axis of the piston cavity, of course, the wall of the buffer cavity can also be an arc surface or a spherical surface, etc.

[0031] The utility model discloses a piston compressor cylinder sleeve, which is pre-removed of material along the edge of the piston cavity at the port, and an annular cavity, i.e. a buffer cavity, is formed between the removal part of the cylinder sleeve port (or the top of the cylinder sleeve) and the valve plate after the cylinder sleeve is assembled with the valve plate of the piston compressor. When the piston compressor is running, the piston reciprocatingly moves up and down in the cylinder sleeve. When the piston moves to the top dead center, the gas is compressed in the piston cavity to form high-temperature and high-pressure gas. The high-temperature and high-pressure of the compressor is discharged from the exhaust valve. Due to the existence of the buffer cavity of the cylinder sleeve port, part of the high-temperature and high-pressure gas is not completely discharged and is stored in the buffer cavity of the cylinder sleeve port. When the piston moves to the bottom dead center, low-temperature and low-pressure gas enters the inside of the cylinder sleeve (i.e. the piston cavity) from the suction valve. At this time, the high-temperature and high-pressure gas stored in the buffer cavity is mixed with the newly entered low-temperature and low-pressure gas, so as to compensate the pressure and temperature of the newly entered gas, thereby achieving the purpose of stabilizing the temperature and pressure in the cylinder, preventing the damage of the compressor valve and the piston ring, and reducing the economic loss.

[0032] The above merely describes preferred embodiments of the present application and is not intended to limit the present application. Those skilled in the art can make various modifications and changes to the present application.

Claims

1. A cylinder liner for a piston compressor, characterized by: The application relates to a cylinder sleeve body mounted on a compressor body, wherein the center of the cylinder sleeve body is provided with a piston cavity in a cylindrical shape for guiding the lifting of a piston, and a buffer cavity is arranged on the port of the cylinder sleeve body.

2. The cylinder liner for a piston compressor according to claim 1, characterized by: The buffer cavity is arranged along the whole circumferential direction of the cylinder sleeve body, so as to facilitate gas diffusion.

3. The cylinder liner for a piston compressor according to claim 1, characterized by: One wall surface of the buffer cavity is a horn-shaped conical surface located at the port of the cylinder sleeve body and connected with the wall surface of the piston cavity.

4. The cylinder liner for a piston compressor according to claim 3, characterized by: The horn-shaped conical surface forms an angle of 50-65 degrees with the axial line of the piston cavity.

5. The cylinder liner for a piston compressor according to claim 1, characterized by: The outer circumferential wall of the cylinder sleeve body is in a stepped shape.

6. A piston compressor comprising a compressor body and a cylinder liner body provided in the compressor body, the cylinder liner body having a piston cavity for guiding a piston lifting movement, the compressor body being provided with a valve plate having an exhaust valve and a suction valve, the lower surface of the valve plate abutting the piston cavity, characterized in that: When the piston in the cylinder sleeve body moves to the top dead center position, the inner wall surface of the port of the cylinder sleeve body, the outer wall surface of the piston and the end surface of a valve plate form a buffer cavity.

7. The piston compressor of claim 6, characterized in that: The buffer cavity is arranged along the whole circumferential direction of the cylinder sleeve body, so as to facilitate gas diffusion.

8. The piston compressor of claim 6, characterized in that: One wall surface of the buffer cavity is a horn-shaped conical surface located at the port of the cylinder sleeve body and connected with the wall surface of the piston cavity.

9. The piston compressor of claim 8, characterized in that: The horn-shaped conical surface forms an angle of 50-65 degrees with the axial line of the piston cavity.

10. The piston compressor of claim 6, characterized in that: The outer circumferential wall of the cylinder sleeve body is in a stepped shape and is integrated with the compressor body.

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