CN213743905U - Polyether-ether-ketone exhaust limiting plate - Google Patents

Abstract

The utility model discloses a polyetheretherketone exhaust limiting plate, which comprises a limiting base plate, wherein the limiting base plate is made of polyetheretherketone material; and the bottom surface of the limiting base plate is provided with an exhaust valve plate, and the exhaust valve plate shields the exhaust hole of the valve plate. In the utility model, the polyetheretherketone material has the characteristics of high temperature resistance, high pressure resistance, oil resistance, refrigerant resistance and the like, and the limiting substrate is integrally formed by adopting an injection molding process; the limiting base plate made of the polyether-ether-ketone material is low in rigidity, has good impact resistance and sound absorption effect, enables the slapping between the exhaust valve plate and the exhaust limiting plate to be non-metal contact, and can obviously improve the surface stress and slapping noise of the exhaust valve plate, so that the service life of the exhaust valve plate under severe working conditions is prolonged.

Description

Polyether-ether-ketone exhaust limiting plate

Technical Field

The utility model belongs to the technical field of compressor spare part, specifically a polyether ether ketone exhaust limiting plate.

Background

The compressor of the refrigerator works on the principle that the supply of the refrigerant to the refrigerating system is periodically and alternately realized through the air suction and exhaust processes. The air suction and exhaust processes are the processes of refrigerant one-way flow, when the piston moves to the bottom dead center, the volume of the cylinder is increased, the gas expands, the air pressure is reduced, when the pressure is reduced to be lower than the air suction pressure, the air suction valve plate is opened, and the refrigerant on the low-pressure side enters the cylinder; when the piston moves to the top dead center, the volume of the cylinder is reduced, the gas is compressed, the gas pressure is increased, and when the pressure is increased to be higher than the exhaust pressure, the exhaust valve plate is opened, and the refrigerant in the cylinder is discharged. Therefore, the performance of the suction and discharge valve plate plays a very critical role in the suction and discharge characteristics of the refrigerant. However, the exhaust valve plate is opened and closed for a long time, bears periodic impact load and bending load, is easy to generate impact fatigue and bending fatigue damage, and causes the compressor to be ventilated and not to refrigerate, even to be blocked, so the fatigue problem of the exhaust valve plate directly influences the service life of the compressor, the failure of the exhaust valve plate becomes one of the most important factors influencing the service life of the refrigerator compressor, and the problem is generally faced by the refrigerator compressor and even the refrigeration industry. In addition, due to the limiting effect of the exhaust limiting plate, the exhaust valve plate can flap on the exhaust limiting plate when opened, the existing exhaust limiting plate is made of metal materials such as steel, the exhaust valve plate is made of carbon steel or martensitic stainless steel, sharp noise is generated when two metal materials with high rigidity flap, and people are sensitive to the noise and become a main noise source of the compressor.

At present, in order to reduce the exhaust noise of the compressor, the refrigeration compressor industry generally adopts a silencing chamber structure or an exhaust silencer, and passive silencing is performed by means of changing the expansion ratio of fluid and the like. However, the use of a sound-deadening chamber or a sound-deadening device can only be used for a certain narrow frequency band, and cannot start with the transmission of noise sources and vibrations. In addition, impact force is reduced by adjusting the lift of the exhaust limiting plate, but the lift of the exhaust limiting plate is related to the exhaust speed of the refrigeration steam of the compressor, so that the performance of the compressor is greatly influenced. In addition, the exhaust limiting plate and the exhaust valve plate are made of steel materials, and impact is rigid impact, so that fatigue fracture of the exhaust valve plate is easily caused, exhaust leakage is caused, and the overall performance of the compressor is influenced.

Disclosure of Invention

The utility model aims at providing a polyether ether ketone exhaust limiting plate solves the noise problem and the tired broken scheduling problem of discharge valve piece among the current compressor exhaust system.

In order to achieve the above object, the utility model adopts the following technical scheme:

the polyether-ether-ketone exhaust limiting plate comprises a limiting base plate, wherein the limiting base plate is made of a polyether-ether-ketone material; and the bottom surface of the limiting base plate is provided with an exhaust valve plate, and the exhaust valve plate shields the exhaust hole of the valve plate. In the utility model, the polyetheretherketone material has the characteristics of high temperature resistance, high pressure resistance, oil resistance, refrigerant resistance and the like, and the limiting substrate is integrally formed by adopting an injection molding process; the limiting base plate made of the polyether-ether-ketone material is low in rigidity, has good impact resistance and sound absorption effect, enables the slapping between the exhaust valve plate and the exhaust limiting plate to be non-metal contact, and can obviously improve the surface stress and slapping noise of the exhaust valve plate, so that the service life of the exhaust valve plate under severe working conditions is prolonged.

Specifically, the exhaust valve plate comprises a fixed end and a free end, and the fixed end is fixedly arranged at the bottom of one end of the limiting base plate; the free end is located below the middle section of the limiting base plate and moves between the limiting base plate and the valve plate.

Optionally, the fixed end and the free end are detachably connected through a first pin shaft, the opening/closing of the exhaust valve plate is realized through the rotation of the free end around the first pin shaft, the problem that the exhaust valve plate bears periodic bending load, so that the exhaust valve plate is subjected to bending fatigue is solved, and the service life of the exhaust valve plate under severe working conditions is prolonged.

Specifically, a spring buffer sheet is arranged between the top surface of the free end and the bottom surface of the middle section of the limiting base plate, and the rattling noise between the exhaust valve plate and the exhaust limiting plate can be further reduced by arranging the spring buffer sheet; meanwhile, the impact force of the exhaust valve plate when the exhaust valve plate is opened is reduced, and the service life of the exhaust valve plate is prolonged; in the process of closing the exhaust valve plate, the compressed spring buffer plate can also provide certain thrust, so that the closing efficiency of the exhaust valve plate is improved.

Optionally, the fixed end and the free end are detachably connected through a second pin shaft, and a torsion spring is sleeved outside the second pin shaft.

Specifically, the torsion spring includes coil portion and 2 extensions that are located coil portion both ends, 2 the extension joint is in between the top surface of free end and the bottom surface of spacing base plate middle section. The torsional spring is sleeved outside the second pin shaft, and the impact force generated when the exhaust valve plate is opened can be buffered by utilizing the compression force storage performance of the torsional spring, so that the service life of the exhaust valve plate is prolonged, and meanwhile, the slapping noise between the exhaust valve plate and the exhaust limiting plate is reduced; in the closing process of the exhaust valve plate, the compressed torsion spring can also provide certain thrust, so that the closing efficiency of the exhaust valve plate is improved.

Optionally, the exhaust valve plate is an integrally formed metal elastic sheet. The integrally formed metal elastic sheet is used as the exhaust valve sheet, so that the structure is simpler, and the cost can be saved.

Specifically, the fixed end of the metal elastic sheet is installed at the bottom of one end of the limiting base plate, and a spring buffer sheet is arranged between the top surface of the free end of the metal elastic sheet and the bottom surface of the middle section of the limiting base plate. The spring buffer sheet is arranged between the metal elastic sheet and the limiting base plate, so that the slapping noise between the exhaust valve sheet and the exhaust limiting plate can be further reduced; meanwhile, the impact force of the exhaust valve plate when the exhaust valve plate is opened is reduced, and the service life of the exhaust valve plate is prolonged; in the process of closing the exhaust valve plate, the compressed spring buffer plate can also provide certain thrust, so that the closing efficiency of the exhaust valve plate is improved.

Specifically, the fixed end is riveted with one end of the limiting substrate through rivet fixing or fastened through a screw connector.

Compared with the prior art, the beneficial effects of the utility model are that: (1) the limiting base plate made of the polyether-ether-ketone material has lower rigidity and good shock resistance and sound absorption effect, so that the slapping between the exhaust valve block and the exhaust limiting plate becomes non-metal contact, the surface stress and slapping noise of the exhaust valve block can be obviously improved, and the service life of the exhaust valve block under severe working conditions is prolonged; (2) the utility model arranges the first pin shaft at the connecting position of the fixed end and the free end of the exhaust valve block, and arranges the spring buffer sheet between the exhaust valve block and the limit base plate, or directly arranges the torsional spring at the connecting position of the fixed end and the free end of the exhaust valve block; on one hand, the problem that the exhaust valve plate is subjected to bending fatigue due to the fact that the exhaust valve plate bears periodic bending load is avoided, and the service life of the exhaust valve plate under severe working conditions is prolonged; on the other hand, the spring buffer sheet is arranged, so that the slapping noise between the exhaust valve sheet and the exhaust limiting plate can be further reduced; meanwhile, the impact force of the exhaust valve plate when the exhaust valve plate is opened is reduced, and the service life of the exhaust valve plate is prolonged; in the process of closing the exhaust valve plate, the compressed spring buffer plate can also provide certain thrust, so that the closing efficiency of the exhaust valve plate is improved.

Drawings

Fig. 1 is a schematic top view of a peek exhaust limiting plate according to embodiment 1 of the present invention;

fig. 2 is a schematic side view of the exhaust limiting plate when the exhaust valve plate is closed according to embodiment 1 of the present invention;

fig. 3 is a schematic side view of the exhaust limiting plate when the exhaust valve plate is opened according to embodiment 1 of the present invention;

fig. 4 is a schematic top view of a peek exhaust limiting plate according to embodiment 2 of the present invention;

fig. 5 is a schematic view of an installation structure of a torsion spring and a second pin shaft in embodiment 2 of the present invention;

fig. 6 is a schematic top view of a peek exhaust limiting plate according to embodiment 3 of the present invention;

fig. 7 is a schematic side view of the exhaust limiting plate according to embodiment 3 of the present invention when the exhaust valve plate is closed;

fig. 8 is a schematic side view of the exhaust limiting plate according to embodiment 3 of the present invention when the exhaust valve plate is opened;

in the figure: 1. a limiting substrate; 2. an exhaust valve plate; 2-1, fixed end; 2-2, free end; 3. a first pin shaft; 4. a spring buffer sheet; 5. a second pin shaft; 6. a torsion spring; 6-1, a coil part; 6-2, an extension; 7. and (4) riveting.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are only some embodiments, not all embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

Example 1

As shown in fig. 1 to 3, the embodiment provides a peek exhaust limiting plate, including a limiting substrate 1, where the limiting substrate 1 is made of peek material; the exhaust valve block 2 is installed to the bottom surface of spacing base plate 1, the exhaust hole of valve plate is sheltered from to exhaust valve block 2. In the utility model, the polyetheretherketone material has the characteristics of high temperature resistance, high pressure resistance, oil resistance, refrigerant resistance and the like, and the limiting substrate 1 is integrally formed by adopting an injection molding process; the limiting base plate 1 made of the polyether-ether-ketone material is low in rigidity and has good impact resistance and sound absorption effect, the exhaust valve plate 2 and the exhaust limiting plate are in non-metal contact in a slapping mode, the surface stress and slapping noise of the exhaust valve plate 2 can be obviously improved, and therefore the service life of the exhaust valve plate 2 under severe working conditions is prolonged.

Specifically, the exhaust valve plate 2 comprises a fixed end 2-1 and a free end 2-2, and the fixed end 2-1 is fixedly riveted with one end of the limiting base plate 1 through a rivet 7 or fastened through a screw connector; the free end 2-2 is located below the middle section of the limiting base plate 1, and the free end 2-2 moves between the limiting base plate 1 and the valve plate.

Preferably, the fixed end 2-1 and the free end 2-2 are detachably connected through a first pin shaft 3, and the opening/closing of the exhaust valve plate 2 is realized through the rotation of the free end 2-2 around the first pin shaft 3, so that the problem that the exhaust valve plate 2 is subjected to bending fatigue due to the fact that the exhaust valve plate 2 bears periodic bending load is avoided, and the service life of the exhaust valve plate 2 under severe working conditions is prolonged.

Specifically, a spring buffer sheet 4 is arranged between the top surface of the free end 2-2 and the bottom surface of the middle section of the limiting base plate 1, and the rattling noise between the exhaust valve sheet 2 and the exhaust limiting plate can be further reduced by arranging the spring buffer sheet 4; meanwhile, the impact force of the exhaust valve plate 2 when the exhaust valve plate is opened is reduced, and the service life of the exhaust valve plate 2 is prolonged; in the process that the exhaust valve plate 2 is closed, the compressed spring buffer sheet 4 can also provide certain thrust, so that the closing efficiency of the exhaust valve plate 2 is improved.

In this embodiment, the radius of the top surface of the spring buffer sheet 4 is consistent with the radius of the bottom surface, the radius of the spring buffer sheet 4 gradually increases from the middle point to the two ends along the radial direction, when the spring buffer sheet 4 is compressed, the thickness of the spring buffer sheet 4 is only the stacking thickness of two rings of spring rings, the occupied space is small, meanwhile, the contact area of the two ends of the spring buffer sheet 4 is large, and the spring buffer sheet 4 is not prone to skew during compression. During installation, the top end of the spring buffer sheet 4 is fixedly connected with the bottom surface of the limiting base plate 1, when the exhaust valve plate 2 is closed, the spring buffer sheet 4 is just in a free state, and the bottom surface of the spring buffer sheet 4 is in contact with the top surface of the exhaust valve plate 2. When the compressor exhausts, the exhaust valve plate 2 is pushed open, the spring buffer plate 4 is compressed to store energy, impact force generated when the exhaust valve plate 2 is opened is buffered, the slapping force between the exhaust valve plate 2 and the limiting base plate 1 is reduced, the service lives of the exhaust valve plate 2 and the limiting base plate 1 are prolonged, and noise generated by slapping is reduced.

Example 2

As shown in fig. 4 and 5, the present embodiment provides a peek exhaust limiting plate, which is different from embodiment 1 in that the fixed end 2-1 and the free end 2-2 are detachably connected by a second pin 5, and a torsion spring 6 is sleeved outside the second pin 5.

Specifically, the torsion spring 6 includes a coil portion 6-1 and 2 extending portions 6-2 located at two ends of the coil portion 6-1, and the 2 extending portions 6-2 are clamped between the top surface of the free end 2-2 and the bottom surface of the middle section of the limiting substrate 1. The torsional spring 6 is sleeved outside the second pin shaft 5, and the impact force generated when the exhaust valve plate 2 is opened can be buffered by utilizing the compression force storage performance of the torsional spring 6, so that the service life of the exhaust valve plate 2 is prolonged, and meanwhile, the slapping noise between the exhaust valve plate 2 and the exhaust limiting plate is reduced; in the closing process of the exhaust valve plate 2, the compressed torsion spring 6 can also provide certain thrust, so that the closing efficiency of the exhaust valve plate 2 is improved.

In this embodiment, the torsion spring 6 is sleeved outside the second pin shaft 5, when the exhaust valve plate 2 is opened, the free end 2-2 of the exhaust valve plate 2 rotates around the second pin shaft 5, meanwhile, the exhaust valve plate 2 compresses the torsion spring 6, the torsion spring 6 is compressed to continuously store energy, the impact force generated when the exhaust valve plate 2 is opened is buffered, the slapping force between the exhaust valve plate 2 and the limiting base plate 1 is reduced, the service lives of the exhaust valve plate 2 and the limiting base plate 1 are prolonged, and the noise generated by slapping is reduced.

In this embodiment, the extension portions 6-2 at one end of the torsion spring 6 are fixedly connected to the bottom surface of the limiting base plate 1, and when the exhaust valve plate 2 is closed, an included angle between the 2 extension portions 6-2 at the two ends of the torsion spring 6 is equal to an included angle between the exhaust valve plate 2 and the limiting base plate 1.

Example 3

As shown in fig. 6 to 8, the present embodiment provides a peek exhaust restriction plate, which is different from embodiments 1 and 2 in that the exhaust valve sheet 2 is an integrally formed metal elastic sheet. The integrally formed metal elastic sheet is used as the exhaust valve plate 2, the structure is simpler, and the cost can be saved.

Specifically, the fixed end 2-1 of the metal elastic sheet is installed at the bottom of one end of the limiting substrate 1, and a spring buffer sheet 4 is arranged between the top surface of the free end 2-2 of the metal elastic sheet and the bottom surface of the middle section of the limiting substrate 1. The spring buffer sheet 4 is arranged between the metal elastic sheet and the limiting base plate 1, so that the slapping noise between the exhaust valve sheet 2 and the exhaust limiting plate can be further reduced; meanwhile, the impact force of the exhaust valve plate 2 when the exhaust valve plate is opened is reduced, and the service life of the exhaust valve plate 2 is prolonged; in the process that the exhaust valve plate 2 is closed, the compressed spring buffer sheet 4 can also provide certain thrust, so that the closing efficiency of the exhaust valve plate 2 is improved.

In this embodiment, vent valve piece 2 is integrated into one piece's metal shrapnel, simple structure, stability, and easily volume production can play and fall the effect of making an uproar and reducing impact fatigue through set up spring buffer piece 4 between metal shrapnel and spacing base plate 1.

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

Claims (5)

1. The polyether-ether-ketone exhaust limiting plate comprises a limiting base plate, and is characterized in that the limiting base plate is made of a polyether-ether-ketone material; the bottom surface of the limiting base plate is provided with an exhaust valve plate, and the exhaust valve plate shields an exhaust hole of the valve plate; the exhaust valve plate comprises a fixed end and a free end, and the fixed end is fixedly arranged at the bottom of one end of the limiting base plate; the free end is positioned below the middle section of the limiting substrate; the fixed end and the free end are detachably connected through a pin shaft.

2. The PEEK exhaust restriction plate of claim 1, wherein a spring buffer sheet is disposed between a top surface of the free end and a bottom surface of the middle portion of the restriction base plate.

3. The PEEK exhaust limiting plate of claim 1, wherein a torsion spring is sleeved outside the pin.

4. The PEEK exhaust limiting plate of claim 3, wherein the torsion spring comprises a coil portion and 2 extending portions at two ends of the coil portion, and the 2 extending portions are clamped between the top surface of the free end and the bottom surface of the middle section of the limiting substrate.

5. The PEEK exhaust limiting plate of claim 1, wherein the fixed end is fastened to one end of the limiting base plate by riveting or screwing.

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