CN111140487A - Compressor unit - Google Patents
Compressor unit Download PDFInfo
- Publication number
- CN111140487A CN111140487A CN202010020647.6A CN202010020647A CN111140487A CN 111140487 A CN111140487 A CN 111140487A CN 202010020647 A CN202010020647 A CN 202010020647A CN 111140487 A CN111140487 A CN 111140487A
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- valve
- compressor
- air inlet
- oil separator
- air outlet
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- 238000007789 sealing Methods 0.000 claims description 57
- 238000012423 maintenance Methods 0.000 claims description 14
- 238000003825 pressing Methods 0.000 claims description 12
- 238000005452 bending Methods 0.000 claims description 10
- 230000000694 effects Effects 0.000 description 9
- 241000405098 Champsodontidae Species 0.000 description 5
- 230000003139 buffering effect Effects 0.000 description 4
- 239000003507 refrigerant Substances 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 238000005299 abrasion Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
- 210000002445 nipple Anatomy 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 210000002421 cell wall Anatomy 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- -1 polytetrafluoroethylene Polymers 0.000 description 1
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 1
- 239000004810 polytetrafluoroethylene Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- 230000002441 reversible effect Effects 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical group O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
- F04B49/22—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00 by means of valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
- F04B39/02—Lubrication
- F04B39/0207—Lubrication with lubrication control systems
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
- F04B39/04—Measures to avoid lubricant contaminating the pumped fluid
Abstract
The invention provides a compressor unit, relates to the technical field of compressors, and solves the problems that in the prior art, the capacity adjustment and loading of a compressor are not smooth, and the compressor has poor series due to insufficient high-low pressure difference; the pressure maintaining valve is a three-way valve with an air inlet, an air outlet and a low-pressure end air inlet; the compressor is connected with an oil separator, an air outlet of the oil separator is connected with an air inlet of the pressure maintaining valve, and an air inlet of a low-pressure end of the pressure maintaining valve is connected with a low-pressure side of the compressor unit. The invention has the characteristics of smooth capacity adjustment loading and quick establishment of high and low pressure difference.
Description
Technical Field
The invention relates to the technical field of compressors, in particular to a compressor unit.
Background
The air-cooled heat pump, the refrigerating unit, the low-temperature brine unit and the like often need cold starting due to weather and other reasons, when the compressor in the units is in cold starting, enough high-low pressure difference cannot be quickly established on the high-low pressure side, so that the conditions that the compressor cannot be loaded and the oil supply is insufficient occur, and the conditions can cause serious damage to the compressor. In reality, an oil pump is usually adopted to supply oil forcibly, the oil pump is a moving part, the reliability of the unit is influenced to a great extent by the shaft seal of the oil pump and the reliability of the motor, the oil supply mode not only increases the cost of the unit, but also reduces the reliability of the unit, and great hidden dangers are left for the reliability of the unit to a great extent. Therefore, the defects that the capacity adjustment loading of the compressor is not smooth and the compressor is poor in series due to insufficient high-low pressure difference in the prior art need to be overcome.
Disclosure of Invention
The invention aims to design a compressor unit to solve the problems of unsmooth capacity adjustment and loading of a compressor and series defects caused by insufficient high-low pressure difference of the compressor in the prior art, and has the characteristics of smooth capacity adjustment and loading and rapid establishment of high-low pressure difference.
The invention is realized by the following technical scheme:
the compressor unit comprises a compressor and a pressure maintaining valve;
the pressure maintaining valve is a three-way valve with an air inlet, an air outlet and a low-pressure end air inlet;
the compressor is connected with an oil separator, an air outlet of the oil separator is connected with an air inlet of the pressure maintaining valve, and an air inlet of a low-pressure end of the pressure maintaining valve is connected with a low-pressure side of the compressor unit.
When the structure is adopted, the pressure maintaining valve is installed in the compressor unit, after the compressor is started, enough high-low pressure difference can be quickly established in a short time, the requirement of minimum safe oil supply pressure of the compressor is met, the smooth capacity adjustment and loading of the compressor are further guaranteed, the compressor is prevented from generating serious faults due to oil loss or poor oil supply, and the reliability of the compressor unit system is improved. The pressure maintaining valve has the function of a check valve, when the compressor is stopped, the compressor can be quickly cut off from being connected with the exhaust pipeline, high-pressure gas is prevented from flowing back into the compressor, and the compressor is effectively prevented from reversing reversely for a long time.
In order to further better implement the invention, the following arrangement structure is particularly adopted: the oil separator connected with the compressor is a built-in oil separator, the built-in oil separator and the compressor are provided with a complete oil loop, an air outlet of the built-in oil separator is used as an air outlet of the compressor, and an air inlet of the pressure maintaining valve is connected with the air outlet of the built-in oil separator.
In order to further better implement the invention, the following arrangement structure is particularly adopted: the oil separator connected with the compressor comprises an internal oil separator and an external oil separator, the air inlet of the pressure maintaining valve is connected with the air outlet of the internal oil separator, and the air outlet of the pressure maintaining valve is connected with the air inlet of the external oil separator.
In order to further better implement the invention, the following arrangement structure is particularly adopted: the oil separator connected with the compressor is an external oil separator, a pipeline accessory is connected between the external oil separator and the compressor through a pipeline, an air outlet of the compressor is connected with an air inlet of the external oil separator, and an air inlet of the pressure maintaining valve is connected with an air outlet of the external oil separator.
In order to further better implement the invention, the following arrangement structure is particularly adopted: the air suction port of the compressor is connected with an air inlet check valve or the air outlet of the compressor is connected with an air outlet check valve, and the air outlet of the air outlet check valve is connected with the air inlet of the external oil separator.
In order to further better implement the invention, the following arrangement structure is particularly adopted: the number of the compressors is at least two, all the compressors are arranged in parallel, air suction ports of all the compressors are connected with an air inlet main pipe, air outlets of all the compressors are connected with an air outlet main pipe, and air outlets of the air outlet main pipe are connected with the external oil separator.
In order to further better implement the invention, the following arrangement structure is particularly adopted: the pressure maintenance valve includes:
the valve body is a three-way valve;
the valve cover connecting sleeve is detachably arranged at the air inlet of the low-pressure end of the valve body;
the valve cover is detachably connected with the air inlet of the low-pressure end of the valve body and tightly fixes the valve cover connecting sleeve to the valve body;
the valve core is arranged on the valve seat of the valve body and is movably matched with the inner wall of the valve cover connecting sleeve;
the first elastic piece is arranged between the valve cover and the valve core and used for providing opening pressure and resetting force for the valve core.
When the structure is arranged, the valve cover of the integrated structure in the prior art is divided into two independent parts, including the valve cover and the valve cover connecting sleeve, the processing difficulty and the processing cost of the valve cover can be reduced, the production efficiency is improved, the valve cover can be directly opened after the valve cover is partially abraded, and then the valve cover connecting sleeve is replaced, so that the replacement cost can be reduced.
In order to further better implement the invention, the following arrangement structure is particularly adopted: the valve cover connecting sleeve and the pressing surface of the valve cover pressing are provided with a first annular groove, and a sealing ring is arranged in the first annular groove.
When the structure is adopted, after the valve cover and the valve sleeve are divided into two independent parts, the valve cover and the valve cover connecting sleeve need to be sealed, and the sealing ring arranged in the first annular groove can improve the sealing capacity between the valve cover and the valve cover connecting sleeve, so that air leakage is avoided.
In order to further better implement the invention, the following arrangement structure is particularly adopted: the sealing ring arranged in the first annular groove is a spring sealing ring.
In order to further better implement the invention, the following arrangement structure is particularly adopted: the spring sealing ring comprises a lip-shaped ring with an upper lip and a lower lip and a sealing ring spring which is arranged in the concave cavity and used for enabling the upper lip and the lower lip to expand outwards;
the upper lip and the lower lip are of inward-extending arc structures, and convex ring parts protruding outwards are arranged on sealing surfaces of the upper lip and the lower lip.
When the structure is arranged, the extrusion effect between the convex ring part and the end face of the valve cover is greater than that of other parts, and the sealing capacity of the part on the end face of the valve cover can be improved.
In order to further better implement the invention, the following arrangement structure is particularly adopted: the sealing ring spring comprises a flat plate framework and a plurality of bent tooth parts symmetrically arranged on two sides of the flat plate framework, all the bent tooth parts are independent from each other, and the bent tooth parts abut against the upper lip and the lower lip to enable the upper lip and the lower lip to be expanded.
When adopting above-mentioned structure that sets up, dull and stereotyped skeleton of dull and stereotyped structure is compared in the skeleton of arc bending structure and can be made the tooth portion of buckling and provide stronger external expanding sealed effect for the lip circle.
In order to further better implement the invention, the following arrangement structure is particularly adopted: the bent tooth part is of an arc structure which is in copying fit with the inner walls of the upper lip and the lower lip.
In order to further better implement the invention, the following arrangement structure is particularly adopted: the case with disk seat complex terminal surface is provided with the second annular groove, set up valve seat sealing washer in the second annular groove, valve seat sealing washer with the terminal surface of second annular groove tank bottom contact is provided with the buffering recess, valve seat sealing washer is provided with the pressure release hole, two openings in pressure release hole are located respectively the cell wall department of buffering recess with valve seat sealing washer's inside wall department be used for with the second annular groove with the air inlet UNICOM of valve body.
When the structure is arranged, the pressure relief hole is favorable for rapidly discharging the refrigerant entering the valve seat sealing ring, and the situation of poor sealing caused by damage to the valve seat sealing ring due to expansion impact after the refrigerant is not timely or discharged is avoided.
In order to further better implement the invention, the following arrangement structure is particularly adopted: the valve core comprises a valve head and a sliding block, the valve head is used for being matched with the valve seat, and the sliding block is used for being matched with the valve cover connecting sleeve.
When the structure is adopted, the valve core comprises the valve head and the sliding block, and the maintenance cost of the valve core can be reduced.
In order to further better implement the invention, the following arrangement structure is particularly adopted: one end of the valve head is movably inserted into the sliding block, a small spring is arranged between the sliding block and the valve head, and the small spring is used for enabling the valve head to press the valve seat.
In order to further better implement the invention, the following arrangement structure is particularly adopted: the valve comprises a valve core, a valve cover connecting sleeve and a valve cover connecting sleeve, wherein the valve core is movably matched with the valve cover connecting sleeve and is provided with an O-shaped ring, the O-shaped ring is sleeved with a ring sleeve, the cross section of the ring sleeve is in a semicircular groove shape, and the ring sleeve is directly contacted with the valve cover connecting sleeve towards the outer side.
When the structure is adopted, the O-shaped ring is protected by sleeving the ring sleeve outside the O-shaped ring, so that the overall durability of the O-shaped ring is improved.
The invention has the following advantages and beneficial effects:
according to the invention, the pressure maintaining valve is arranged in the compressor unit, so that sufficient high-low pressure difference can be quickly established in a short time after the compressor is started, the requirement of minimum safe oil supply pressure of the compressor is met, the smooth capacity adjustment and loading of the compressor are further ensured, the compressor is prevented from generating serious faults due to oil loss or poor oil supply, and the reliability of the compressor unit system is improved. The pressure maintaining valve has the function of a check valve, when the compressor is stopped, the compressor can be quickly cut off from being connected with the exhaust pipeline, high-pressure gas is prevented from flowing back into the compressor, and the compressor is effectively prevented from reversing reversely for a long time.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic diagram of a compressor unit with an oil separator;
FIG. 2 is a schematic view of a compressor package without its own oil separator (intake check valve);
FIG. 3 is a schematic view of a compressor package without its own oil separator (discharge check valve);
FIG. 4 is a schematic view of the structure of two compressor trains;
FIG. 5 is a schematic cross-sectional view of a pressure maintenance valve;
FIG. 6 is an enlarged partial view of portion A of FIG. 5;
FIG. 7 is an enlarged partial view of portion B of FIG. 6;
FIG. 8 is a schematic structural view of a seal ring spring;
FIG. 9 is an enlarged partial view of portion C of FIG. 6;
labeled as:
1. a valve body; 2. a valve head; 3. a valve seat sealing ring; 4. a slider; 5. a spring washer; 6. an O-shaped ring; 11. a bolt; 12. a valve cover; 13. a right angle joint; 16. the valve cover is sleeved; 17. a paper shim; 18. a first elastic member; 19. a small spring; 20. a needle valve body; 21. a valve core; 27. a first ring groove; 28. a spring seal ring; 29. a lip-shaped ring; 30. the upper lip; 31. a lower lip; 32. a concave cavity; 33. a convex ring part; 34. a seal ring spring; 35. a flat plate skeleton; 36. bending the tooth part; 37. a buffer groove; 38. a pressure relief vent; 39. sleeving a ring; 40. a compressor; 41. an intake check valve; 42. an external oil separator; 43. an exhaust check valve; 44. an oil filter; 45. an oil cooler; 46. an intake manifold; 47. a low pressure suction balance tube; 48. a pressure maintenance valve; 49. and a gas outlet header pipe.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the examples given herein without any inventive step, are within the scope of the present invention.
Example 1:
the compressor unit has the characteristics of smooth capacity adjustment loading and rapid establishment of high and low pressure differences, and is particularly arranged into the following structures as shown in figures 1, 2, 3, 4, 5, 6, 7, 8 and 9:
basically, the compressor package includes a compressor 40 and a pressure maintenance valve 48 mounted in association therewith. The pressure maintaining valve 48 is a three-way valve having an air inlet, an air outlet, and a low-pressure end air inlet, the axis of the air inlet coincides with the axis of the low-pressure end air inlet, and the axis of the air inlet is perpendicular to the axis of the air outlet. The compressor 40 is connected to an oil separator, the outlet of which is connected to the inlet of a pressure maintenance valve 48, the inlet of the low pressure side of which valve 48 is connected to the low pressure side of the compressor train.
Specifically, for the compressor 40 of the unit with the oil separator, the oil separator connected to the compressor 40 is a built-in oil separator, the built-in oil separator and the compressor 40 have a complete oil circuit, the oil circuit has complete pipeline accessories, and the pipeline accessories include an oil pump, an oil filter, an oil cooler and the like. The pressure maintenance valve 48 is directly mounted to the air outlet of the compressor 40, i.e., the air inlet of the pressure maintenance valve 48 is connected to the air outlet of the built-in oil separator, because the air outlet of the built-in oil separator is now the air outlet of the compressor 40. The low pressure side inlet of the pressure maintaining valve 48 is connected to a low pressure suction balance pipe 47, and the low pressure suction balance pipe 47 is connected to the low pressure side of the unit, such as the suction port of the compressor 40 or the air inlet pipe.
For the unit without the oil separator in the compressor 40, the oil separator connected to the compressor 40 is an external oil separator 42, the external oil separator 42 is connected to the oil supply port of the compressor 40 through a pipeline and pipeline accessories, the pipeline accessories include an oil pump, an oil filter 44, an oil cooler 45 and the like, the air outlet of the compressor 40 is connected to the air inlet of the external oil separator 42, a pressure maintaining valve 48 is directly installed on the air outlet side of the external oil separator 42, namely the air inlet of the pressure maintaining valve 48 is connected to the air outlet of the external oil separator 42, the low-pressure end air inlet of the pressure maintaining valve 48 is connected to a low-pressure air intake balance pipe 47, and the low-pressure air intake balance pipe 47 is connected to the low-pressure side of the compressor unit, such as the air intake or the air. Meanwhile, an air inlet check valve 41 is connected to an air inlet of the compressor 40 or an air outlet check valve 43 is connected to an air outlet of the compressor 40, and an air outlet of the air outlet check valve 43 is connected to an air inlet of the external oil separator 42.
For a compressor unit with a compressor 40 having an internal oil separator and an external oil separator 42 connected thereto, the connected oil separators are the internal oil separator and the external oil separator 42, the internal oil separator and the compressor 40 have a complete oil loop, the oil loop has complete pipeline accessories, the pipeline accessories include an oil pump, an oil filter, an oil cooler and the like, the external oil separator 42 and an oil supply port of the compressor 40 are connected by a pipeline and the pipeline accessories, and the pipeline accessories include an oil pump, an oil filter 44, an oil cooler 45 and the like. The inlet of the pressure maintenance valve 48 is connected to the outlet of the internal oil separator, and the outlet of the pressure maintenance valve 48 is connected to the inlet of the external oil separator 42. The low pressure side inlet of the pressure maintaining valve 48 is connected to a low pressure suction balance pipe 47, and the low pressure suction balance pipe 47 is connected to the low pressure side of the compressor unit, such as the suction port of the compressor 40 or the air inlet pipe.
For a compressor unit with two or more compressors 40 connected in parallel, all the compressors 40 are connected in parallel, the air inlets of all the compressors 40 are connected to an air inlet manifold 46, the air outlets of all the compressors 40 are connected to an air outlet manifold 49, a pressure maintaining valve 48 is directly installed on the air outlet side of an external oil separator 42 of the compressor unit, the air outlet of the air outlet manifold 49 is connected to the air inlet of the external oil separator 42, the air inlet at the low-pressure end of the pressure maintaining valve 48 is connected to a low-pressure air suction balancing pipe 47, and the low-pressure air suction balancing pipe 47 is connected to the low-pressure side of the compressor unit, such as the air inlet or an air inlet pipe. The external oil separator 42 is connected with the oil supply port of each compressor 40 through a pipeline and pipeline accessories thereof.
By installing the pressure maintaining valve 48 in the compressor unit, after the compressor 40 is started, sufficient high-low pressure difference can be quickly established in a short time, so that the requirement of minimum safe oil supply pressure of the compressor is met, the smooth capacity adjustment and loading of the compressor are further ensured, the compressor is prevented from generating serious faults due to oil loss or poor oil supply, and the reliability of the compressor unit system is improved. The pressure maintaining valve 48 also has a check valve function, so that when the compressor 40 is stopped, the connection between the compressor 40 and the exhaust line can be quickly cut off, the high-pressure gas can be prevented from flowing back into the compressor 40, and the long-term reverse rotation of the compressor can be effectively avoided. Meanwhile, the mode of forcibly supplying oil by using an oil pump can be abandoned to ensure that the oil supply of the compressor is sufficient, so that the unit cost is prevented from greatly increasing and the reliability of the unit is improved.
The compressor unit with the pressure maintaining valve can realize the function of year-round refrigeration, so that the compressor can adapt to the changing demand of system load at any time, and the power consumption of the compressor can be greatly reduced. After the compressor is started, enough high-low pressure difference can be quickly established in a short time to meet the requirement of the minimum safe oil supply pressure difference of the compressor, so that smooth capacity adjustment and loading of the compressor are guaranteed, serious faults of the compressor caused by oil loss or poor oil supply are avoided, and the reliability of a unit is improved. Compared with the traditional unit, the compressor unit with the pressure maintaining valve does not need any special processing technology, is low in cost and high in reliability, and does not increase the operation cost of the unit.
The pressure maintenance valve in this embodiment includes a valve body 1, a bonnet nipple 16, a bonnet 12, a valve spool, and a first elastic member 18. The valve body 1 is a three-way valve and is provided with an air inlet, an air outlet and a low-pressure end air inlet, channels of the three ports, namely the air inlet, the air outlet and the low-pressure end air inlet, are converged at one position, and a valve seat for arranging a valve core is arranged at the converged position.
The valve cover connecting sleeve 16 is a through hole type upper end flange structural member, a counter bore is arranged at the air inlet of the low pressure end of the valve body 1, the end of the valve cover 12 is also provided with a counter bore which is matched with the counter bore arranged at the air inlet of the low pressure end of the valve body 1 in an aligning way, paper gaskets 17 are respectively paved in the counter bores of the valve cover connecting sleeve 16 and the valve body 1, the bottom end of the flange of the valve cover connecting sleeve 16 is seated at the paper gaskets 17 of the counter bore arranged at the air inlet of the low pressure end of the valve body 1, and the valve sleeve part of the valve cover connecting sleeve.
The valve cover 12 is also a flange part, the valve cover 12 is detachably connected to the air inlet of the low-pressure end of the valve body 1 through a bolt 11, a paper gasket 17 arranged in a counter bore of the valve cover 12 is erected at the top end of the valve cover connecting sleeve 16, the valve cover connecting sleeve 16 is located in a counter bore formed between the valve cover 12 and the valve body 1, the valve cover 12 compacts and fixes the valve cover connecting sleeve 16 on the end face of the valve body 1, and the detachable connection of the air inlet of the low-pressure end of the valve body 1 and the valve cover connecting sleeve 16 is achieved.
The valve core is arranged at the valve seat of the valve body 1, the valve core is movably matched with the inner wall of the valve cover connecting sleeve 16, the valve core is provided with two O-shaped rings 6, and the valve core can reciprocate up and down along the valve cover connecting sleeve 16 to complete the opening and closing action of the valve core.
The first elastic part 18 is arranged in a space between the valve cover 12 and the valve core, the top end of the first elastic part 18 abuts against the valve cover 12, the bottom end of the first elastic part 18 abuts against the top of the valve core, and the first elastic part 18 is used for providing opening pressure and reset force for the valve core.
The valve cover with the integrated structure in the prior art is divided into two independent parts, including the valve cover 12 and the valve cover connecting sleeve 16, the previous complex integrated part structure is divided into two independent parts with simpler structures, the processing difficulty and the processing cost of the valve cover can be reduced, the production efficiency is improved, the valve cover 12 can be directly opened after the valve cover is partially abraded, then the valve cover connecting sleeve 16 is replaced, and the replacement cost can be reduced. The valve assembly is more convenient by pressing and fixing the valve cover connecting sleeve 16 through the valve cover 12, the valve core can be positioned more reliably, and the valve performance is stable and reliable.
As a preferable sealing scheme of the bonnet adapter 16 and the bonnet 12 in this embodiment, the bonnet adapter 16 and the bonnet 12 are two components that are fixed and sealed by pressing, so that the fixing and sealing effects between the bonnet adapter 16 and the bonnet 12 are realized by a pressing surface, and the machining precision and the matching precision required by the pressing surface of the bonnet adapter 16 and the bonnet 12 are high. The first annular groove 27 is formed in the pressing surface where the valve cover connecting sleeve 16 and the valve cover 12 are pressed, the sealing ring is arranged in the first annular groove 27, the sealing effect is achieved or assisted to achieve jointly through the sealing ring, the processing difficulty and cost of the valve cover 12 and the valve cover connecting sleeve 16 can be reduced, and the sealing capacity between the valve cover 12 and the valve cover connecting sleeve 16 can also be improved.
Specifically, the sealing ring disposed in the first annular groove 27 is selected as a spring sealing ring 28, the spring sealing ring 28 includes a lip ring 29 and a sealing ring spring 34, the lip ring 29 has an upper lip 30 and a lower lip 31 symmetrically disposed, the upper lip 30 and the lower lip 31 are of an inwardly extending arc structure, a cavity 32 is formed between the upper lip 30 and the lower lip 31, and the sealing ring spring 34 is mounted in the cavity 32 for expanding the upper lip 30 and the lower lip 31 outwardly for providing a strong sealing effect.
As a preferable structure of the spring sealing ring in the present embodiment, the sealing surfaces of the upper lip 30 and the lower lip 31 are both provided with convex ring portions 33, the cross section of the convex ring portions 33 is similar to a triangle, but the head portions are rounded heads with gentle transitions. When in sealing, the valve cover 12 and the valve cover connecting sleeve 16 which need to be sealed simultaneously press the upper lip 30 and the lower lip 31, the convex ring part 33 is more convex than other parts, so that the pressing effect between the convex ring part 33 and the end surface of the valve cover 12 is larger than that of other parts, and the sealing capability of the part on the end surface of the valve cover 12 can be improved.
The springs used in the existing spring sealing rings are generally spiral type or V-shaped springs. The coil type spring itself is characterized by a pitch, and thus, the elastic force generated to the lip 29 cannot be continuous. The framework of the V-shaped spring can be bent to form a fillet, continuous and uniform load cannot be provided after the framework forms a ring, and sealing of low-leakage occasions is difficult to meet. As a preferred structure scheme of the seal ring spring 34 in this embodiment, the seal ring spring includes a flat plate frame 35 and a plurality of bending tooth portions 36 symmetrically disposed on both sides of the flat plate frame 35, the flat plate frame 35 is of a flat plate structure, all the bending tooth portions 36 are independent from each other without bending design, the bending tooth portions 36 are arc-shaped structures which are in profiling fit with the inner walls of the upper lip 30 and the lower lip 31, and the bending tooth portions 36 abut against the upper lip 30 and the lower lip 31 to expand the upper lip 30 and the lower lip 31. The flat plate framework 35 of the flat plate structure can enable the bent tooth part 36 to provide a stronger outward expanding sealing effect for the lip-shaped ring 29 compared with the framework of the arc-shaped bent structure, and has the characteristic of low leakage amount.
A needle valve body 20 for detecting internal pressure is respectively arranged at the air inlet channel part and the air outlet channel part of the valve body 1, a valve core 21 is arranged in the needle valve body 20, and a sealing ring and a nut which are matched with each other are arranged at the end part of the needle valve body 20.
After the valve cover and the valve sleeve are divided into two independent components, namely the valve cover 12 and the valve cover connecting sleeve 16, the valve cover 12 and the valve cover connecting sleeve 16 need to be sealed to prevent leakage, the valve cover connecting sleeve 16 and the valve cover 12 are two components which are fixed and sealed through pressing, so that the valve cover connecting sleeve 16 and the valve cover 12 realize the fixing and sealing effects through a pressing surface, the machining precision and the matching precision required by the pressing surface of the valve cover connecting sleeve 16 and the valve cover 12 are higher, and the sealing ring arranged in the first annular groove 27 can improve the sealing capacity between the valve cover 12 and the valve cover connecting sleeve 16 and avoid air leakage. The paper gasket 17 is arranged to protect the press-fit surface, so that surface crushing is avoided and the sealing effect is improved, meanwhile, if the valve core is opened fully, the valve core can be abutted against the bottom end of the valve cover connecting sleeve 16, and the paper gasket 17 is arranged to avoid hard collision between the valve cover 12 and the valve cover connecting sleeve 16 and between the valve cover connecting sleeve 16 and the valve body 1 under the condition, so that no abnormal sound is generated when the valve core is opened fully.
Example 2:
the embodiment is further optimized on the basis of the above embodiment, and in order to further better implement the invention, the following arrangement structure is particularly adopted:
the end face, matched with the valve seat, of the valve core is provided with a second annular groove, a valve seat sealing ring 3 is arranged in the second annular groove, an inwards concave buffering groove 37 is arranged on the end face, contacted with the bottom of the second annular groove, of the top end of the valve seat sealing ring 3, the buffering groove 37 is preferably an arc groove, the valve seat sealing ring 3 is provided with pressure relief holes 38, the pressure relief holes are generally two or four, and the pressure relief holes 38 are arranged along the circumferential equal-interval angular distribution of the valve seat sealing ring 3. Two openings of the pressure relief hole 38 are respectively located at the groove wall of the buffer groove 37 and the inner side wall of the valve seat sealing ring to form an inclined hole, and the pressure relief hole 38 is used for communicating the second annular groove with the air inlet of the valve body 1. The pressure relief hole 38 is beneficial to discharging the refrigerant entering the valve seat sealing ring 3 quickly, and avoids the situation of poor sealing caused by damage to the valve seat sealing ring 3 due to expansion impact after the refrigerant is not discharged in time.
Example 3:
the embodiment is further optimized on the basis of the above embodiment, and in order to further better implement the invention, the following arrangement structure is particularly adopted:
the valve core comprises two mutually independent parts, including valve head 2 and slider 4, valve head 2 is used for cooperating with the disk seat, slider 4 is used for with valve gap nipple 16 clearance fit. Wherein, valve head 2 is located the disk seat department of valve body 1, and slider 4 and the inner wall clearance fit of valve gap adapter sleeve 16, and two rings of grooves have been seted up to the outer wall department of slider 4, and every circle inslot is provided with one O type circle 6, and slider 4 can accomplish the action of opening and shutting of case along valve gap adapter sleeve 16 up-and-down reciprocating motion.
The valve core comprises a valve head 2 and a sliding block 4, the structure complexity can be reduced, the processing difficulty is reduced, the production efficiency is improved, the abrasion part of the sliding block 4 can be replaced independently, and the maintenance cost of the valve core is reduced. One end of the valve head 2 is provided with a cylinder structure, the cylinder structure is movably inserted into the sliding block 4, a small spring 19 is arranged between the sliding block 4 and the valve head 2, and the small spring 19 is arranged in the cylinder structure and used for enabling the valve head 2 to compress the valve seat and enabling the valve head 2 to be rapidly closed.
Example 4:
the embodiment is further optimized on the basis of the above embodiment, and in order to further better implement the invention, the following arrangement structure is particularly adopted:
the O-shaped ring 6 which is arranged on the valve core and is used for being in sealing fit with the valve cover connecting sleeve 16 belongs to a quick-wear part and is easy to wear after long-term use, so that the O-shaped ring 6 is sleeved with the ring sleeve 39 to protect the O-shaped ring 6, and the integral durability of the O-shaped ring 6 is improved. Specifically, the ring sleeve 39 is a structural member made of polytetrafluoroethylene material, the cross section of the ring sleeve 39 is in the shape of a semicircular groove, the inner diameter of the semicircular groove is slightly smaller than the diameter of the circular cross section of the O-shaped ring 6, so that the O-shaped ring 6 can be stably clamped on the inner side of the ring sleeve 39, when the ring sleeve 39 is sleeved on the O-shaped ring 6, the ring sleeve 39 faces outwards and is directly contacted with the valve cover sleeve 16, the sealing performance of the sliding block 4 and the valve cover sleeve 16 can be improved, the abrasion of the O-shaped ring 6 can be reduced, and therefore the service life of the pressure maintaining valve is effectively prolonged.
Example 5:
the embodiment is further optimized on the basis of the above embodiment, and in order to further better implement the invention, the following arrangement structure is particularly adopted:
an arc-shaped groove is formed in one surface, namely the bottom surface, facing the air inlet end of the air inlet, of the valve head 2 to form a dome structure. The arrangement of the arc-shaped groove increases the stress area of the valve head 2, thereby effectively improving the valve opening sensitivity of the pressure maintaining valve, improving the opening degree of the valve head 2 and reducing the pressure loss of the valve.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention.
Claims (10)
1. Compressor unit, its characterized in that: comprises a compressor (40) and a pressure maintaining valve (48);
the pressure maintenance valve (48) is a three-way valve having an inlet port, an exhaust port, and a low pressure side inlet port;
the compressor (40) is connected with an oil separator, an air outlet of the oil separator is connected with an air inlet of the pressure maintaining valve (48), and an air inlet at the low-pressure end of the pressure maintaining valve (48) is connected with the low-pressure side of the compressor unit.
2. The compressor rack of claim 1, wherein: the oil separator connected with the compressor (40) is a built-in oil separator, the built-in oil separator and the compressor (40) are provided with a complete oil loop, an air outlet of the built-in oil separator is used as an air outlet of the compressor (40), and an air inlet of the pressure maintaining valve (48) is connected with the air outlet of the built-in oil separator.
3. The compressor rack of claim 1, wherein: the oil separators connected to the compressor (40) are an internal oil separator and an external oil separator (42), the air inlet of the pressure maintaining valve (48) is connected to the air outlet of the internal oil separator, and the air outlet of the pressure maintaining valve (48) is connected to the air inlet of the external oil separator (42).
4. The compressor rack of claim 1, wherein: the oil separator connected with the compressor (40) is an external oil separator (42), a pipeline accessory is connected between the external oil separator (42) and the compressor (40) through a pipeline, an air outlet of the compressor is connected with an air inlet of the external oil separator (42), and an air inlet of the pressure maintaining valve (48) is connected with an air outlet of the external oil separator.
5. The compressor rack of claim 4, wherein: an air inlet check valve (41) is connected to an air inlet of the compressor (40) or an air outlet of the compressor (40) is connected with an air outlet check valve (43), and an air outlet of the air outlet check valve (43) is connected with an air inlet of the external oil separator (42).
6. The compressor rack according to any one of claims 3-5, characterized in that: the number of the compressors (40) is at least two, all the compressors (40) are arranged in parallel, air suction ports of all the compressors (40) are connected with an air inlet main pipe (46), air outlet ports of all the compressors (40) are connected with an air outlet main pipe (49), and an air outlet port of the air outlet main pipe is connected with the external oil separator.
7. The compressor rack of claim 1, wherein: the pressure maintenance valve (48) includes:
the valve body (1) is provided with an air inlet, an air outlet and a low-pressure end air inlet, the axis of the air inlet coincides with that of the low-pressure end air inlet, and the axis of the air inlet is perpendicular to that of the air outlet;
the valve cover connecting sleeve (16), the valve cover connecting sleeve (16) is detachably arranged at the air inlet of the low-pressure end of the valve body (1);
the valve cover (12), the valve cover (12) is detachably connected with the air inlet of the low-pressure end of the valve body (1) and compacts and fixes the valve cover connecting sleeve (16) on the valve body (1);
the valve core is seated on the valve seat of the valve body (1) and is movably matched with the inner wall of the valve cover connecting sleeve (16);
the first elastic piece (18) is arranged between the valve cover (12) and the valve core, and is used for providing opening pressure and resetting force for the valve core along the axial direction of the air inlet.
8. The compressor rack of claim 7, wherein: a first annular groove (27) is formed in a pressing surface, pressed with the valve cover (12), of the valve cover connecting sleeve (16), a spring sealing ring (28) is arranged in the first annular groove (27), and the spring sealing ring (28) comprises a lip-shaped ring (29) with an upper lip (30) and a lower lip (31) and a sealing ring spring (34) which is arranged in a cavity (32) and used for enabling the upper lip (30) and the lower lip (31) to expand outwards; the upper lip (30) and the lower lip (31) are of inward-extending arc structures, and convex ring parts (33) are arranged on sealing surfaces of the upper lip (30) and the lower lip (31).
9. The compressor rack of claim 8, wherein: the sealing ring spring (34) comprises a flat plate framework (35) and a plurality of bending tooth parts (36) symmetrically arranged on two sides of the flat plate framework (35), all the bending tooth parts (36) are independent from each other, and the bending tooth parts (36) are propped against the upper lip (30) and the lower lip (31) to enable the upper lip and the lower lip to expand outwards.
10. The compressor rack according to any of claims 7-9, characterized in that: the valve core is used for being provided with an O-shaped ring (6) at the position movably matched with the valve cover connecting sleeve (16), the O-shaped ring (6) is sleeved with a ring sleeve (39), the cross section of the ring sleeve (39) is in the shape of a semicircular groove, and the ring sleeve (39) is directly contacted with the valve cover connecting sleeve (16) towards the outer side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010020647.6A CN111140487A (en) | 2020-01-09 | 2020-01-09 | Compressor unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010020647.6A CN111140487A (en) | 2020-01-09 | 2020-01-09 | Compressor unit |
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| Publication Number | Publication Date |
|---|---|
| CN111140487A true CN111140487A (en) | 2020-05-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010020647.6A Pending CN111140487A (en) | 2020-01-09 | 2020-01-09 | Compressor unit |
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| CN (1) | CN111140487A (en) |
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|---|---|---|---|---|
| CN101696731A (en) * | 2009-09-30 | 2010-04-21 | 李雄 | Two-way contact type shaft seal ring |
| CN202141256U (en) * | 2011-06-16 | 2012-02-08 | 浙江国祥空调设备有限公司 | Year-round water cooled chiller set |
| CN203717926U (en) * | 2014-02-26 | 2014-07-16 | 北京裕泰行新材料科技有限公司 | Sealing assembly |
| CN203784398U (en) * | 2014-03-20 | 2014-08-20 | 新昌县利永达制冷机械有限公司 | Pressure sustaining valve |
| CN105352711A (en) * | 2015-11-02 | 2016-02-24 | 新昌县利永达制冷机械有限公司 | Constant pressure valve and detection device and detection method thereof |
| CN211474402U (en) * | 2020-01-09 | 2020-09-11 | 北京比泽尔制冷设备有限公司 | Compressor unit |
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2020
- 2020-01-09 CN CN202010020647.6A patent/CN111140487A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101696731A (en) * | 2009-09-30 | 2010-04-21 | 李雄 | Two-way contact type shaft seal ring |
| CN202141256U (en) * | 2011-06-16 | 2012-02-08 | 浙江国祥空调设备有限公司 | Year-round water cooled chiller set |
| CN203717926U (en) * | 2014-02-26 | 2014-07-16 | 北京裕泰行新材料科技有限公司 | Sealing assembly |
| CN203784398U (en) * | 2014-03-20 | 2014-08-20 | 新昌县利永达制冷机械有限公司 | Pressure sustaining valve |
| CN105352711A (en) * | 2015-11-02 | 2016-02-24 | 新昌县利永达制冷机械有限公司 | Constant pressure valve and detection device and detection method thereof |
| CN211474402U (en) * | 2020-01-09 | 2020-09-11 | 北京比泽尔制冷设备有限公司 | Compressor unit |
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Address after: 101300 building 3, No. 16, Yuanying Road, Zhaofeng industrial base, zhaoquanying Town, Shunyi District, Beijing Applicant after: Beijing bivico refrigeration equipment Co.,Ltd. Address before: 101300 building 3, No. 16, Yuanying Road, Zhaofeng industrial base, zhaoquanying Town, Shunyi District, Beijing Applicant before: BEIJING BITZER REFRIGERATION EQUIPMENT Co.,Ltd. |