Exhaust valve plate channel structure

Abstract

The utility model discloses an exhaust valve plate channel structure, which relates to the technical field of compressors and comprises a cylinder cover, an exhaust space is arranged in the cylinder cover, a valve plate is arranged at the bottom of the cylinder cover, a plurality of exhaust valve holes are arranged on the valve plate, and an exhaust limit seat corresponding to the exhaust valve holes is arranged in the exhaust space of the cylinder cover. An exhaust limiting seat is arranged on the exhaust valve plate, an exhaust limiting seat compression spring is arranged between the exhaust limiting seat and the cylinder cover, a plurality of external expansion blocks are arranged on the exhaust limiting seat in an external expansion mode, the external expansion blocks protrude out of the exhaust limiting seat, and the external expansion blocks abut against the valve plate. The lift of the exhaust valve plate is increased, exhaust channels are increased, exhaust resistance is reduced, exhaust speed is increased, impact of liquid impact on the exhaust valve plate is reduced, and therefore the liquid impact resistance of the exhaust valve plate of the refrigeration compressor is greatly improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a compressor technical field, concretely relates to an exhaust valve piece channel structure. BACKGROUND

[0002] With the continuous improvement of people's living standards, the demand for refrigeration and freezing fresh food is increasing, and refrigeration compressor, as the core component of compression refrigeration mode, is widely used. In the range of 5-40 horsepower refrigeration compressor, semi-enclosed piston type refrigeration compressor is mainly used, and the current semi-enclosed piston type refrigeration compressor valve structure is basically spring tongue type valve structure,

[0003] The main disadvantage of spring tongue type valve structure is that due to the limitation of piston refrigeration compressor cylinder surface design and cylinder diameter, the suction and exhaust channel cross-sectional area of spring tongue type valve structure is small, which causes the anti-liquid knock capacity of compressor valve structure to be weak. In use, the compressor valve piece is often broken, the compressor fails to work, and the refrigeration system cannot work normally. Therefore, the timeliness of compressor maintenance is brought certain pressure. SUMMARY

[0004] The utility model aims at solving the technical problem of providing an exhaust valve piece channel structure to solve the problem of liquid knock of compressor piston.

[0005] TECHNICAL SOLUTION

[0006] To solve the above problems, the technical scheme provided by the utility model is:

[0007] An exhaust valve piece channel structure, comprising a cylinder cover, an exhaust space is arranged in the cylinder cover, a valve plate is arranged at the bottom of the cylinder cover, a plurality of exhaust valve holes are arranged on the valve plate, an exhaust limiting seat corresponding to the exhaust valve hole is arranged in the exhaust space of the cylinder cover, an exhaust limiting seat compression spring is arranged between the exhaust limiting seat and the cylinder cover, a plurality of expansion blocks are arranged outside the exhaust limiting seat, the expansion blocks protrude from the exhaust limiting seat, and the expansion blocks abut against the valve plate.

[0008] Further, an exhaust limiting seat guide cylindrical pin is fixedly arranged around the exhaust valve hole, a through hole is arranged in the expansion block, and the exhaust limiting seat guide cylindrical pin is inserted into the through hole of the expansion block.

[0009] Further, a gap is arranged between the exhaust limiting seat and the valve plate, and an exhaust valve piece and an exhaust spring piece are arranged in the gap between the exhaust limiting seat and the valve plate.

[0010] Further, a through hole is arranged at the center position of the exhaust limiting seat, an exhaust screw is arranged in the through hole, and the exhaust valve seat is arranged outside the one end of the exhaust screw in the exhaust valve hole.

[0011] Furthermore, the exhaust valve plate covers the exhaust valve orifice.

[0012] Furthermore, the exhaust spring is an annular elastic element.

[0013] Furthermore, the elastic force of the exhaust spring is less than the elastic force of the exhaust limit seat compression spring.

[0014] Furthermore, the outer expansion blocks are evenly arranged around the exhaust limiting seat.

[0015] Furthermore, a plurality of exhaust holes are arranged around the exhaust limiting seat.

[0016] Furthermore, a valve cover sealing gasket is provided between the cylinder head and the valve plate, and a valve plate sealing gasket is provided at the bottom of the valve plate.

[0017] Beneficial effects

[0018] Compared with the prior art, the technical solution provided by this utility model has the following advantages:

[0019] 1. By designing an anti-liquid slugging spring, when the exhaust valve plate and valve seat are subjected to liquid slugging impact, the spring is compressed by the impact to increase the exhaust valve plate lift, increase the exhaust passage, reduce exhaust resistance, accelerate the exhaust speed, and reduce the impact of liquid slugging on the exhaust valve plate, thereby greatly improving the anti-liquid slugging capability of the refrigeration compressor's exhaust valve plate.

[0020] 2. In this design, a valve plate is arranged on the cylinder surface of the compressor. On each valve plate group, depending on the number of cylinders, one or more of the above-mentioned intake and exhaust valve plate channel structures can be designed and installed.

[0021] 3. The suction and discharge channels of the refrigeration compressor in this design are arranged in a ring on the valve plate of the compressor cylinder. The cross-sectional area of ​​the suction and discharge channels can be increased to the maximum extent according to the cylinder diameter. The cross-sectional area of ​​the newly designed suction and discharge channels can reach 1.3 to 2.0 times that of the original design, which greatly reduces the suction and discharge resistance and improves the anti-liquid slugging ability of the valve structure.

[0022] 4. Each cylinder consists of an annular intake valve and an annular exhaust valve, with the exhaust valve pressed against the valve plate by several exhaust springs.

[0023] 5. While ensuring the strength of the valve plate, the cylinder clearance caused by the valve plate exhaust channel is eliminated, and the cylinder clearance at the top of the piston is reduced to the maximum extent, thereby improving the low-temperature efficiency of the refrigeration compressor and increasing its COP value.

[0024] 6. When the exhaust valve plate and valve seat are subjected to liquid impact and move up and down, three guide cylindrical pins are used for positioning to reduce the friction of movement and ensure the timely opening and timely reset reliability of the exhaust valve plate and valve seat. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of Embodiment 1 of the present utility model;

[0026] Figure 2 This is a bottom view of Embodiment 1 of the present utility model;

[0027] Figure 3 for Figure 2 Cross-sectional view of AA in the middle;

[0028] Figure 4 This is a schematic diagram of the exhaust limiting seat structure of Embodiment 1 of this utility model;

[0029] Figure 5 This is a schematic diagram of the exhaust spring in Embodiment 1 of this utility model. Detailed Implementation

[0030] To make the technical solution of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0031] Example 1

[0032] Combined with appendix Figures 1-5 An exhaust valve plate channel structure is used on a reciprocating refrigeration compressor and is installed on the compressor cover. It includes a cylinder head 12, an exhaust space 121 is provided inside the cylinder head 12, a valve plate 1 is provided on the bottom plane of the cylinder head 12, the exhaust space 121 extends to the bottom plane of the cylinder head 12, a valve cover sealing gasket 13 is provided between the cylinder head 12 and the valve plate 1, and a valve plate sealing gasket 9 is provided at the bottom of the valve plate 1.

[0033] The valve plate 1 is provided with a number of exhaust valve holes 20. The number and position of the exhaust valve holes 20 correspond to the cylinder port of the piston refrigeration compressor. The exhaust space 121 in the cylinder head 12 is provided with an exhaust limiting seat 2 at the position corresponding to the exhaust valve holes 20. A number of outward expansion blocks 21 are fixedly arranged around the exhaust limiting seat 2. The outward expansion blocks 21 are evenly distributed around the exhaust limiting seat 2 and protrude from the exhaust limiting seat 2. The outward expansion blocks 21 are provided with through holes. The exhaust valve holes 20 on the valve plate 1 are fixedly arranged around the outer periphery of the side facing the exhaust space 121 with exhaust limiting seat guide cylindrical pins 8. The exhaust limiting seat guide cylindrical pins 8 pass through the through holes of the outward expansion blocks 21 of the exhaust limiting seat 2.

[0034] There is a gap between the exhaust limiting seat 2 and the valve plate 1. The outward expansion block 21 abuts against the valve plate 1. Several exhaust holes 22 are arranged around the exhaust limiting seat 2. An exhaust limiting seat compression spring 6 is provided between the exhaust limiting seat 2 and the cylinder head 12 located around the exhaust holes 22. The exhaust limiting seat compression spring 6 interacts with the cylinder head 12 of the exhaust space 121, thereby continuously pushing the exhaust limiting seat 2, so that the outward expansion block 21 around the exhaust limiting seat 2 keeps abutting against the valve plate 1. The exhaust limiting seat compression spring 6 is preferably a spring.

[0035] The exhaust limit seat 2 has a through hole at its center, and an exhaust screw 7 is provided in the through hole at the center of the exhaust limit seat 2. An exhaust valve seat 5 is fixedly provided at one end of the exhaust screw 7 located in the exhaust valve hole 20. The exhaust valve seat 5 is extended outward at one end of the exhaust screw 7 located in the exhaust valve hole 20.

[0036] The gap between the exhaust limit seat 2 and the valve plate 1 is provided with an exhaust valve plate 3 and an exhaust spring plate 4. The exhaust valve plate 3 is located on one side of the valve plate 1, and the exhaust spring plate 4 is located on one side of the cylinder head 12.

[0037] The exhaust valve plate 3 is located between the exhaust limit seat 2 and the exhaust valve hole 20. The exhaust valve plate 3 completely covers the exhaust valve hole 20 on the side of the cylinder head 12. At the same time, the exhaust valve plate 3 is located within the exhaust limit seat 2 and the outer expansion block 21. The exhaust valve plate 3 is a flat valve plate.

[0038] The exhaust spring 4 is an annular elastic element. The exhaust spring 4 itself has elastic force. The elastic force of the exhaust spring 4 pushes the exhaust valve plate 3 to abut against the side of the cylinder head 12 of the exhaust valve seat 5. The elastic force of the exhaust spring 4 is less than the elastic force of the exhaust limit seat compression spring 6. The exhaust spring 4 is preferably an annular wave spring. In other embodiments, the exhaust spring can be replaced with other elastic elements that do not obstruct the passage of gas, such as a spring.

[0039] The exhaust screw 7 is provided with an exhaust locking nut 11 at the end on one side of the cylinder head 12. The exhaust locking nut 11 fixes the exhaust screw 7 to the exhaust limit seat 2. In other embodiments, the through hole is provided with threads, so that the exhaust screw 7 is directly fixed by threaded engagement with the threaded through hole of the exhaust limit seat 2.

[0040] An intake valve plate 10 is provided around the exhaust valve hole 20. A transition intake channel corresponding to the intake valve plate 1 is provided in the valve plate 1. Similarly, an intake channel corresponding to the transition intake channel is provided in the cylinder head 1. The size of the intake valve plate 10 is larger than the opening of the transition intake channel, so that when the compressor is discharging, the exhaust pressure will cause the intake valve plate 10 to cover the transition intake channel, preventing the gas to be discharged from entering the transition intake channel.

[0041] The cylinder head 12 is provided with multiple cylinder head bolts 14, which pass through the valve plate 1, thereby fixing the cylinder head 12 and the valve plate 1 to the compressor.

[0042] When the reciprocating refrigeration compressor starts, as the piston moves, when exhaust is required, the gas is compressed by the piston and the pressure on the exhaust valve plate 3 gradually increases, thereby causing the exhaust valve plate 3 to counteract the elastic force of the exhaust spring plate 4, causing the exhaust spring plate 4 to deform. At this time, the exhaust valve plate 3 no longer covers and blocks the exhaust valve hole 20, and a gap appears between the exhaust valve plate 3 and the valve plate 1. The exhaust gas passes through the gap between the exhaust valve plate 3 and the valve plate 1 and passes through the exhaust hole 22, thereby being discharged.

[0043] During normal operation of the piston, the pressure of the compressed gas is less than the elastic force of the exhaust limit seat spring 6. Therefore, during normal operation, the exhaust will only push the exhaust valve plate 3 to move, while the exhaust limit seat 2 itself will not move.

[0044] When liquid appears inside the piston, due to the limited compressibility of the liquid, when the piston moves to or near the limit position, the pressure becomes too high. At this time, the pressure is greater than the elastic force of the exhaust limit seat compression spring 6, and the exhaust limit seat 2 moves, directly expelling the liquid mixed in inside the piston, thereby preventing liquid hammer.

[0045] The valve cover gasket 13 and the valve plate gasket 9 are conventionally configured, so they are omitted in the structural description of this embodiment.

[0046] Furthermore, the top clearance of the compressor piston can be made as small as possible, thereby reducing the clearance volume of the compressor's exhaust passage. This plays a decisive role in improving the low-temperature operating efficiency of the refrigeration compressor and increasing the COP value (the COP value of a compressor refers to the ratio of the compressor's cooling capacity to its input power (the electrical power consumed in W)).

[0047] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. An exhaust valve segment passage structure characterized by comprising: The cylinder head is provided with an exhaust space, the bottom of the cylinder head is provided with a valve plate, the valve plate is provided with a plurality of exhaust valve holes, the exhaust space of the cylinder head is provided with an exhaust limiting seat corresponding to the exhaust valve hole, the exhaust limiting seat is provided with an exhaust limiting seat compression spring between the exhaust limiting seat and the cylinder head, the exhaust limiting seat is provided with a plurality of expansion blocks, the expansion blocks protrude from the exhaust limiting seat, and the expansion blocks abut against the valve plate.

2. The exhaust valve segment passage structure according to claim 1, characterized by The exhaust limiting seat is provided with an exhaust limiting seat guide cylindrical pin outside the exhaust valve hole, the expansion block is provided with a through hole, and the exhaust limiting seat guide cylindrical pin is inserted into the through hole of the expansion block.

3. The exhaust valve segment passage structure according to claim 2, characterized by The exhaust limiting seat and the valve plate are provided with a gap, and the gap between the exhaust limiting seat and the valve plate is provided with an exhaust valve piece and an exhaust spring piece.

4. The exhaust valve segment passage structure according to claim 3, characterized by The exhaust limiting seat is provided with a through hole at the center position, the through hole is provided with an exhaust screw, and the exhaust screw is provided with an exhaust valve seat outside the one end in the exhaust valve hole.

5. The exhaust valve segment passage structure according to claim 4, characterized by The exhaust valve piece covers the exhaust valve hole.

6. The exhaust valve segment passage structure according to claim 4, characterized by The exhaust spring piece is an annular elastic piece.

7. The exhaust valve segment passage structure according to claim 3, characterized by The elastic force of the exhaust spring piece is smaller than the elastic force of the exhaust limiting seat compression spring.

8. The exhaust valve segment passage structure according to claim 1, characterized by The expansion blocks are uniformly arranged around the exhaust limiting seat.

9. The exhaust valve segment passage structure according to claim 1, characterized by The exhaust limiting seat is provided with a plurality of exhaust holes.

10. The exhaust valve segment passage structure according to claim 1, characterized by The cylinder head and the valve plate are provided with a valve cover sealing gasket, and the bottom of the valve plate is provided with a valve plate sealing gasket.

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