CN112412748B - Piston assembly, crankshaft assembly, compressor and refrigeration equipment - Google Patents
Piston assembly, crankshaft assembly, compressor and refrigeration equipment Download PDFInfo
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- CN112412748B CN112412748B CN202011239509.3A CN202011239509A CN112412748B CN 112412748 B CN112412748 B CN 112412748B CN 202011239509 A CN202011239509 A CN 202011239509A CN 112412748 B CN112412748 B CN 112412748B
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- piston
- pin hole
- pin
- eccentric
- crankshaft
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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
- F04B39/0005—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 adaptations of pistons
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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
- F04B39/0005—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 adaptations of pistons
- F04B39/0022—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 adaptations of pistons piston rods
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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
- F04B39/0094—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 crankshaft
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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
- F04B39/14—Provisions for readily assembling or disassembling
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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
- F04B49/12—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 varying the length of stroke of the working members
- F04B49/123—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 varying the length of stroke of the working members by changing the eccentricity of one element relative to another element
- F04B49/125—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 varying the length of stroke of the working members by changing the eccentricity of one element relative to another element by changing the eccentricity of the actuation means, e.g. cams or cranks, relative to the driving means, e.g. driving shafts
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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
- F04B49/12—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 varying the length of stroke of the working members
- F04B49/14—Adjusting abutments located in the path of reciprocation
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J1/00—Pistons; Trunk pistons; Plungers
- F16J1/10—Connection to driving members
- F16J1/14—Connection to driving members with connecting-rods, i.e. pivotal connections
- F16J1/16—Connection to driving members with connecting-rods, i.e. pivotal connections with gudgeon-pin; Gudgeon-pins
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Compressor (AREA)
Abstract
The utility model provides a piston assembly, bent axle subassembly, compressor and refrigeration plant, piston assembly includes: the piston is provided with a fixed cavity, the connecting rod is provided with a first end and a second end, the first end extends into the fixed cavity, and the second end is connected with a crankshaft of the compressor; the piston is provided with a first pin hole, the first end is provided with a second pin hole, a piston pin is installed in the first pin hole, and the piston pin can penetrate through the first pin hole and fix the second pin hole at a first intercept position or fix the second pin hole at a second intercept position. The connecting mode of piston and connecting rod in this disclosed piston assembly that adopts variable intercept through changing the intercept of piston and piston pin, changes the stroke dead center position of piston, and connecting rod and bent axle in the bent axle assembly adopt variable eccentric volume's connecting mode, through changing the eccentric volume of crank, changes the stroke dead center position of piston, makes the displacement of compressor variable to satisfy the diversified requirement of compressor.
Description
Technical Field
The utility model belongs to the technical field of the compressor, concretely relates to piston assembly, bent axle subassembly, compressor and refrigeration plant.
Background
Refrigeration equipment such as a refrigerator serves as daily life electric appliances, along with the increase of the types of the electric appliances and the diversification of functional purposes, reciprocating compressors in the related art have single discharge capacity due to single part structure and assembly mode, are not beneficial to expanding compressor products with different discharge capacities, and are difficult to meet the matching requirements of the refrigeration equipment.
Disclosure of Invention
Therefore, the technical problem to be solved by the present disclosure is that the reciprocating compressor has a single part structure and assembly mode, and the compressor has a single displacement, thereby providing a piston assembly, a crankshaft assembly, a compressor and a refrigeration device.
In order to solve the above problems, the present disclosure provides a piston assembly including:
a piston, a connecting rod; the piston is provided with a fixed cavity, the connecting rod is provided with a first end and a second end, the first end extends into the fixed cavity, and the second end is connected with a crankshaft of the compressor;
the piston is provided with a first pin hole, the first end is provided with a second pin hole, a piston pin is installed in the first pin hole, and the piston pin can penetrate through the first pin hole and fix the second pin hole at a first intercept position or fix the second pin hole at a second intercept position.
In some embodiments, the first pin hole is groove-shaped extending in an axial direction of the piston, and the wrist pin includes a first key portion matching the first pin hole, a first cylindrical portion matching the second pin hole, and the first cylindrical portion is fixed perpendicularly to the first key portion at a position near either of the head portions.
In some embodiments, the head of the working end surface of the first pin hole close to the piston is the head of the pin hole, the first intercept position is the distance between the center line of the first cylindrical portion and the working end surface of the piston when the first cylindrical portion is close to the head of the pin hole, and the second intercept position is the distance between the center line of the first cylindrical portion and the working end surface of the piston when the first cylindrical portion is far away from the head of the pin hole.
In some embodiments, the width of the first key shape is equal to the diameter of the first cylindrical portion.
In some embodiments, the piston is further provided with a third pin hole perpendicular to the first pin hole and penetrating to the first pin hole, and a first fixing pin is installed in the third pin hole and configured to fix the piston pin in the first pin hole.
In some embodiments, the piston outer peripheral wall is provided with an annular cooling oil groove provided with an oil passing hole communicating with the fixed chamber.
In some embodiments, the first pin bore is disposed within the cooling oil gallery and the wrist pin is provided with a first lubrication bore.
A crankshaft assembly, comprising:
a crankshaft, a connecting rod; the crankshaft comprises an eccentric table, the connecting rod is provided with a first end and a second end, the second end is connected with the eccentric table, and the first end is connected with the piston;
the eccentric table is provided with an eccentric groove, the second end of the eccentric table is provided with a crank hole, a crank piece is installed in the eccentric groove, and the crank piece is configured to be arranged in the eccentric groove and fix the crank hole at a first eccentric position or fix the crank hole at a second eccentric position.
In some embodiments, the crank member includes a second key portion that mates with the eccentric slot, a second cylindrical portion that mates with the crank bore, and a second cylindrical portion that is vertically fixed to the second key portion adjacent either head.
In some embodiments, the head of the eccentric groove close to the axis of the crankshaft is used as the eccentric head, the first eccentric position is the distance between the center line of the second cylindrical part and the axis of the crankshaft when the second cylindrical part is close to the eccentric head, and the second eccentric position is the distance between the center line of the second cylindrical part and the axis of the crankshaft when the second cylindrical part is far away from the eccentric head.
In some embodiments, the eccentric table is further provided with a fourth pin hole perpendicular to the eccentric groove and penetrating to the eccentric groove, and a second fixing pin is installed in the fourth pin hole and configured to fix the crank member in the eccentric groove.
In some embodiments, the crank member is provided with a second lubrication hole.
A compressor adopts above-mentioned piston assembly, and/or, above-mentioned bent axle subassembly.
A refrigeration device adopts the piston assembly and/or the crankshaft assembly.
The piston assembly, the crankshaft assembly, the compressor and the refrigeration equipment provided by the disclosure at least have the following beneficial effects:
1. the piston assembly comprises a piston, a connecting rod, a piston pin, a piston rod and a piston rod.
2. The connecting rod and the crankshaft in the crankshaft assembly adopt a variable eccentricity connecting mode, and the stroke dead center position of the piston is changed by changing the eccentricity of the crankshaft, so that the displacement of the compressor is variable, and the diversified requirements of the compressor are met.
Drawings
FIG. 1 is a schematic illustration of a piston assembly and crankshaft assembly according to an embodiment of the present disclosure;
FIG. 2 is a first schematic structural diagram of a piston according to an embodiment of the present disclosure;
FIG. 3 is a second schematic structural view of a piston according to an embodiment of the present disclosure;
FIG. 4 is a schematic structural view of a piston pin according to an embodiment of the present disclosure;
FIG. 5 is an exploded view of the structure of the crankshaft assembly of the disclosed embodiment;
fig. 6 is a schematic structural diagram of a compressor according to an embodiment of the present disclosure.
The reference numerals are represented as:
1. a piston; 2. a connecting rod; 3. a fixed cavity; 4. a first end; 5. a second end; 6. a crankshaft; 7. a first pin hole; 8. a second pin hole; 9. a piston pin; 10. a first key shape portion; 11. a first cylindrical portion; 13. a third pin hole; 14. a first fixing pin; 15. cooling the oil tank; 16. an oil passing hole; 17. a first lubricating oil hole; 18. an eccentric table; 19. an eccentric groove; 20. a crank bore; 21. a crank member; 22. a second key shape portion; 23. a second cylindrical portion; 24. a fourth pin hole; 25. a second fixing pin; 26. a second lubricant hole; 27. a third lubrication oil hole; 28. and a cylinder.
Detailed Description
To make the objects, technical solutions and advantages of the present disclosure more apparent, the following embodiments of the present disclosure will be clearly and completely described in conjunction with the accompanying drawings. It is to be understood that the described embodiments are merely a subset of the disclosed embodiments and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments disclosed herein without making any creative effort, shall fall within the protection scope of the present disclosure.
As shown in fig. 1 to 4, an embodiment of the present disclosure provides a piston assembly, including: a piston 1 and a connecting rod 2; the piston 1 is provided with a fixed cavity 3, the connecting rod 2 is provided with a first end 4 and a second end 5, the first end 4 extends into the fixed cavity 3, and the second end 5 is connected with a crankshaft 6 of the compressor; the piston 1 is provided with a first pin bore 7, the first end 4 is provided with a second pin bore 8, a piston pin 9 is mounted in the first pin bore 7, and the piston pin 9 is configured to be able to pass through the first pin bore 7 to fix the second pin bore 8 in a first intercept position or to fix the second pin bore 8 in a second intercept position.
The piston assembly disclosed by the invention aims at the problem that after the piston and the connecting rod are connected through the cylindrical piston pin in the related art, the distance from the working end surface of the piston to the central line of the piston pin, namely the intercept, is fixed, the reciprocating operation stroke of the piston is fixed, the displacement of the compressor is fixed, and the diversified requirements of the compressor cannot be met. The piston and the connecting rod adopt a variable intercept connecting mode, and the stroke stop point of the piston is changed by changing the intercept of the piston and the piston pin, so that the displacement of the compressor is variable, and the diversified requirements of the compressor are met.
In some embodiments, the first pin hole 7 has a groove shape extending in the axial direction of the piston 1, and the piston pin 9 includes a first key portion 10 and a first cylindrical portion 11, the first key portion 10 being fitted to the first pin hole 7, the first cylindrical portion 11 being fitted to the second pin hole 8, and the first cylindrical portion 11 being vertically fixed to the first key portion 10 at a position near either head.
In some embodiments, the first key shape portion 10 may also be a circular portion, and any shape capable of fixing the first cylindrical portion 11 at different positions in the axial direction of the piston 1 may achieve the technical effects of the present disclosure.
The piston pin 9 of the present embodiment adopts a key shape and a cylindrical shape, the first key shape part 10 is connected with the piston 1, the first cylindrical part 11 is connected with the connecting rod 2, when the connection position of the first cylindrical part 11 and the first key shape part 10 changes, the distance between the working end surface of the piston 1 and the first cylindrical part 11, namely the intercept changes, the first cylindrical part 11 is matched with the second pin hole 8 of the connecting rod 2, and the position of the first cylindrical part 11 and the position of the connecting rod 2 are relatively fixed, so that the piston 1 and the connecting rod 2 have position change. With a fixed range of motion of the connecting rod 2, the stroke that the working end face of the piston 1 can travel also changes.
In some embodiments, the head of the working end surface of the first pin hole 7 close to the piston 1 is a pin hole head, the first intercept position is a distance between a center line of the first cylindrical portion 11 and the working end surface of the piston 1 when the first cylindrical portion 11 is close to the pin hole head, and the second intercept position is a distance between a center line of the first cylindrical portion 11 and the working end surface of the piston 1 when the first cylindrical portion 11 is far from the pin hole head.
In the present embodiment, when the crankshaft 6 rotates to a specific angle at the first cutoff point, the distance between the working end surface of the piston 1 and the end surface of the cylinder 28 is the largest, the stroke in which the piston 1 can perform compression operation is the longest, and the displacement of the compressor is the largest. The position is a top dead center of the movement, and at the moment, an included angle between a connecting line of the center of the second end 5 and the axis of the crankshaft 6 and a center line of the reciprocating movement is a top dead center included angle which is consistent with the specific angle. In the second intercept position, when the crankshaft 6 rotates to a specific angle, the distance between the working end surface of the piston 1 and the end surface of the cylinder 28 is minimum, the stroke of the piston 1 capable of performing compression operation is shortest, and the displacement of the compressor is minimum.
In some embodiments, the distance of the piston 1 protruding out of the end surface of the cylinder 28 is 0.17-0.35 mm, and the distance from the working end surface of the piston 1 to the suction valve plate in the cylinder head assembly when the piston 1 runs to the bottom dead center is adjusted to be 0.05mm by the cylinder head gasket.
In some embodiments, the width of the first key shape portion 10 is equal to the diameter of the first cylindrical portion 11. Thereby, the piston pin 9 is ensured to have sufficient strength, and breakage during the reciprocating motion of the piston 1 is avoided.
In some embodiments, in order to prevent the piston pin 9 from falling out of the first pin hole 7 and affecting the reliability of the connection between the piston 1 and the connecting rod 2, the piston 1 is further provided with a third pin hole 13, the third pin hole 13 is perpendicular to the first pin hole 7 and penetrates through the first pin hole 7, a first fixing pin 14 is installed in the third pin hole 13, and the first fixing pin 14 is configured to fix the piston pin 9 in the first pin hole 7.
In some embodiments, the outer peripheral wall of the piston 1 is provided with an annular cooling oil groove 15, and the cooling oil groove 15 is provided with an oil passing hole 16 communicating with the fixed chamber 3. The first pin hole 7 is arranged in the cooling oil groove 15, and the piston pin 9 is provided with a first lubricating oil hole 17. The outer peripheral wall of the piston 1 is divided into a working section and a non-working section by the cooling oil groove 15, the working section is close to the working end face of the piston 1, the non-working section is far away from the working end face of the piston 1, the outer diameter of the non-working section is smaller than that of the working section, the frozen oil splashed to the cylinder 28 by the crankshaft 6 enters the cooling oil groove 15 from the tail part of the piston 1 through a gap between the non-working section and the inner wall of the cylinder 28, the frozen oil in the cooling oil groove 15 lubricates the cylinder 28, and heat generated by friction is taken away. Part of the freezing oil enters the fixed cavity 3 through the oil passing hole 16, lubricates and cools the connecting rod 2 and the piston pin 9, and lubricates and cools the inner wall of the connecting rod 2 and the fixed cavity 3, and part of the freezing oil reaches the rotating matching surface of the piston pin 9 and the connecting rod 2 through the first lubricating oil hole 17 to lubricate and cool the rotating matching surface.
The piston assembly of this embodiment, through the direction of adjustment piston pin 9, makes the hookup location change of piston 1 and connecting rod 2, changes piston assembly's intercept, realizes different discharge capacity designs, satisfies the diversified demand of compressor. In the present embodiment, only two intercept positions are disclosed, but based on the design idea of the present disclosure, the number of intercept positions is determined by the shape of the wrist pin 9, such as when the first cylindrical portion 11 is arranged at the center of the first key portion 10, an intermediate intercept between the first and second intercept may be generated. Thus, in theory, the piston assembly of the present disclosure is capable of achieving at least two different intercepts.
Referring to fig. 1 and 5, the present embodiment provides a crankshaft assembly, including: a crankshaft 6, a connecting rod 2; the crankshaft 6 comprises an eccentric table 18, the connecting rod 2 is provided with a first end 4 and a second end 5, the second end 5 is connected with the eccentric table 18, and the first end 4 is connected with the piston 1; the eccentric table 18 is provided with an eccentric groove 19, the second end 5 is provided with a crank hole 20, a crank member 21 is arranged in the eccentric groove 19, and the crank member 21 is configured to be arranged in the eccentric groove 19 to fix the crank hole 20 at a first eccentric position or fix the crank hole 20 at a second eccentric position.
The bent axle subassembly of this embodiment is connected the back to bent axle and connecting rod among the correlation technique, because the bent axle structure is fixed, and the crank portion is fixed for the eccentric volume of the axis of bent axle, and the connecting rod is connected behind the crank portion, and the connecting rod is rotatory along with the bent axle, and it is fixed to drive piston reciprocating motion's stroke, and the displacement of compressor is fixed, can't satisfy the diversified demand of compressor. The connecting rod and the crankshaft adopt a connection mode of variable eccentricity, and the stroke dead center of the piston is changed by changing the eccentricity of the crankshaft, so that the displacement of the compressor is variable, and the diversified requirements of the compressor are met.
In some embodiments, the crank member 21 includes a second key 22, a second cylindrical portion 23, the second key 22 mating with the eccentric groove 19, the second cylindrical portion 23 mating with the crank hole 20, the second cylindrical portion 23 being vertically fixed to the second key 22 near either head.
In the present embodiment, the crank portion integrated with the crankshaft in the related art is formed separately as the crank member 21, and the crank member 21 is formed in a composite form of the second key portion 22 and the second cylindrical portion 23, and the eccentricity of the second end 5 of the connecting rod 2 can be changed by changing the position of the second cylindrical portion 23 on the second key portion 22, so that the piston 1 connected to the connecting rod 2 has different reciprocating strokes and different exhaust amounts are generated.
In some embodiments, the second key portion 22 may also be a circular portion, and any shape capable of fixing the second cylindrical portion 23 at different positions in the radial direction of the crankshaft 6 may achieve the technical effects of the present disclosure.
In some embodiments, the head of the eccentric groove 19 close to the axis of the crankshaft 6 is an eccentric head, the first eccentric position is the distance between the center line of the second cylindrical portion 23 and the axis of the crankshaft 6 when the second cylindrical portion 23 is close to the eccentric head, and the second eccentric position is the distance between the center line of the second cylindrical portion 23 and the axis of the crankshaft 6 when the second cylindrical portion 23 is far from the eccentric head.
In this embodiment, in the first eccentric position, when the crankshaft 6 rotates to a specific angle, the connecting rod 2 drives the piston 1 to reciprocate until the distance between the working end face of the piston 1 and the end face of the cylinder 28 is the minimum, the stroke of the piston 1 capable of performing compression work is the shortest, and the displacement of the compressor is the minimum. In the second eccentric position, when the crankshaft 6 rotates to a specific angle, the connecting rod 2 drives the piston 1 to reciprocate until the distance between the working end face of the piston 1 and the end face of the cylinder 28 is the largest, the stroke of the piston 1 capable of performing compression work is the longest, and the displacement of the compressor is the largest.
In some embodiments, the distance of the piston 1 protruding out of the end surface of the cylinder 28 is 0.17-0.35 mm, and the distance from the working end surface of the piston 1 to the suction valve plate in the cylinder head assembly when the piston 1 runs to the bottom dead center is adjusted to be 0.05mm by the cylinder head gasket.
In some embodiments, in order to ensure the connection reliability of the eccentric table 18 and the crank member 21, the eccentric table 18 is further provided with a fourth pin hole 24, the fourth pin hole 24 is perpendicular to the eccentric groove 19 and penetrates through the eccentric groove 19, a second fixing pin 25 is installed in the fourth pin hole 24, and the second fixing pin 25 is configured to fix the crank member 21 in the eccentric groove 19.
In some embodiments, a second lubrication hole 26 is provided in the crank member 21, and a third lubrication hole 27 is provided in the second fixing pin 25. In this embodiment, after the frozen oil is sucked through the oil suction pipe assembly of the crankshaft 6, the frozen oil rises to the oil outlet of the matching section of the motor stator inside the crankshaft 6 and enters the spiral oil feeding groove of the moving part, lubricates the bearing holes of the crankshaft 6 and the cylinder block, rises to the oil outlet of the matching section of the bearing holes, enters the eccentric table 18, passes through the third lubricating oil hole 27, and reaches the second lubricating oil hole 26. The refrigerant oil lubricates the crank member 21 and the connecting rod 2, and a part of the refrigerant oil rises to the top end and splashes to the cylinder 28 by the centrifugal force of the rotational motion, thereby lubricating the piston 1 and the cylinder 28.
The bent axle subassembly of this embodiment is through the direction of adjustment crank spare 21 for the hookup location of bent axle 6 and connecting rod 2 changes, changes the eccentric magnitude of bent axle 6, realizes different discharge capacity designs, satisfies the diversified design of compressor. In the present embodiment, only two eccentric positions are disclosed, but based on the design idea of the present disclosure, the number of eccentric positions is determined by the shape of the crank member 21, such as when the second cylindrical portion 23 is disposed at the center of the second key shape portion 22, an intermediate eccentric amount between the first eccentric amount and the second eccentric amount can be generated, and thus, the crankshaft assembly of the present disclosure can theoretically realize at least two different eccentric amounts.
A compressor adopts above-mentioned piston assembly, and/or, above-mentioned bent axle subassembly. In addition, this disclosed compressor still includes that epitheca subassembly, inferior valve subassembly, motor stator, motor rotor, cylinder block, interior calandria subassembly, cylinder head subassembly and relevant auxiliary component assemble and form. The motor rotor is in interference fit with the crankshaft 6, the motor stator is assembled with a cylinder block machine foot through screws, and the cylinder head assembly is assembled on the cylinder block through screws to achieve sealing of the compression cylinder 28.
After the crankshaft assembly is assembled in a bearing hole of the cylinder block, the lower part of the crankshaft assembly is in interference fit with a motor rotor and serves as a transmission component to enable the crankshaft 6 to perform rotary motion, a crank piece 21 of the crankshaft assembly is in clearance fit with a crank hole 20 of the connecting rod 2, a second pin hole 8 of the connecting rod 2 is in clearance fit with a piston pin 9, and the rotary motion of the crankshaft 6 is converted into reciprocating linear motion of the piston 1 due to the eccentric design of the crankshaft assembly.
The compressor of this embodiment can only adopt the piston assembly of variable intercept or the bent axle subassembly of variable eccentricity, also can adopt the piston assembly of variable intercept, the bent axle subassembly of variable eccentricity simultaneously, obtains the air displacement design of at least two kinds, satisfies different compressor air displacement demands.
A refrigeration device adopts the piston assembly and/or the crankshaft assembly.
It is readily understood by a person skilled in the art that the advantageous ways described above can be freely combined, superimposed without conflict.
The present disclosure is to be considered as limited only by the terms of the appended claims and all changes that come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. The foregoing is only a preferred embodiment of the present disclosure, and it should be noted that, for those skilled in the art, several improvements and modifications can be made without departing from the technical principle of the present disclosure, and these improvements and modifications should also be considered as the protection scope of the present disclosure.
Claims (9)
1. A crankshaft assembly, comprising:
a piston assembly; the piston assembly comprises a piston (1) and a connecting rod (2); the piston (1) is provided with a fixed cavity (3), the connecting rod (2) is provided with a first end (4) and a second end (5), the first end (4) extends into the fixed cavity (3), and the second end (5) is connected with a crankshaft (6) of the compressor; a first pin hole (7) is formed in the piston (1), a second pin hole (8) is formed in the first end (4), a piston pin (9) is installed in the first pin hole (7), and the piston pin (9) is configured to penetrate through the first pin hole (7) and fix the second pin hole (8) at a first intercept position or fix the second pin hole (8) at a second intercept position;
a crankshaft (6) and a connecting rod (2); the crankshaft (6) comprises an eccentric table (18), the connecting rod (2) is provided with a first end (4) and a second end (5), the second end (5) is connected with the eccentric table (18), and the first end (4) is connected with the piston (1);
the eccentric table (18) is provided with an eccentric groove (19), the second end (5) is provided with a crank hole (20), a crank piece (21) is installed in the eccentric groove (19), and the crank piece (21) is configured to be arranged in the eccentric groove (19) and fix the crank hole (20) at a first eccentric position or fix the crank hole (20) at a second eccentric position; the first pin hole (7) is groove-shaped and extends along the axial direction of the piston (1), the piston pin (9) comprises a first key-shaped part (10) and a first cylindrical part (11), the first key-shaped part (10) is matched with the first pin hole (7), the first cylindrical part (11) is matched with the second pin hole (8), and the first cylindrical part (11) is vertically fixed at the position of the first key-shaped part (10) close to any head part; taking the head of the working end surface of the first pin hole (7) close to the piston (1) as a pin hole head, wherein the first intercept position is the distance between the center line of the first cylindrical part (11) and the working end surface of the piston (1) when the first cylindrical part (11) is close to the pin hole head, and the second intercept position is the distance between the center line of the first cylindrical part (11) and the working end surface of the piston (1) when the first cylindrical part (11) is far away from the pin hole head;
the crank member (21) comprises a second key-shaped part (22) and a second cylindrical part (23), the second key-shaped part (22) is matched with the eccentric groove (19), the second cylindrical part (23) is matched with the crank hole (20), and the second cylindrical part (23) is vertically fixed at a position, close to any head, of the second key-shaped part (22);
the head of the eccentric groove (19) close to the axis of the crankshaft (6) is an eccentric groove head, the first eccentric position is the distance between the central line of the second cylindrical part (23) and the axis of the crankshaft (6) when the second cylindrical part (23) is close to the eccentric groove head, and the second eccentric position is the distance between the central line of the second cylindrical part (23) and the axis of the crankshaft (6) when the second cylindrical part (23) is far away from the eccentric groove head.
2. The crankshaft assembly as in claim 1, wherein the first key shape portion (10) has a width equal to the first cylindrical portion (11) diameter.
3. The crankshaft assembly according to claim 1, characterized in that the piston (1) is further provided with a third pin hole (13), the third pin hole (13) being perpendicular to the first pin hole (7) and penetrating to the first pin hole (7), a first fixing pin (14) being mounted in the third pin hole (13), the first fixing pin (14) being configured to fix the piston pin (9) in the first pin hole (7).
4. An assembly according to claim 1, characterized in that the outer peripheral wall of the piston (1) is provided with an annular cooling oil groove (15), the cooling oil groove (15) being provided with an oil passage hole (16) communicating with the fixed chamber (3).
5. An assembly according to claim 4, characterized in that the first pin bore (7) is arranged in the cooling oil sump (15) and the wrist pin (9) is provided with a first lubrication bore (17).
6. The crankshaft assembly as in claim 5, wherein the eccentric table (18) is further provided with a fourth pin hole (24), the fourth pin hole (24) is perpendicular to the eccentric groove (19) and extends through to the eccentric groove (19), a second fixing pin (25) is mounted in the fourth pin hole (24), and the second fixing pin (25) is configured to fix the crank member (21) in the eccentric groove (19).
7. A crankshaft assembly according to claim 1, characterized in that the crankshaft piece (21) is provided with a second oil lubrication hole (26).
8. A compressor, characterized by the use of a crankshaft assembly as claimed in any one of claims 1 to 7.
9. A refrigeration apparatus, characterized by the use of a crankshaft assembly as claimed in any one of claims 1 to 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011239509.3A CN112412748B (en) | 2020-11-09 | 2020-11-09 | Piston assembly, crankshaft assembly, compressor and refrigeration equipment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011239509.3A CN112412748B (en) | 2020-11-09 | 2020-11-09 | Piston assembly, crankshaft assembly, compressor and refrigeration equipment |
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| Publication Number | Publication Date |
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| CN112412748A CN112412748A (en) | 2021-02-26 |
| CN112412748B true CN112412748B (en) | 2022-05-31 |
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| CN1477308A (en) * | 2002-08-19 | 2004-02-25 | 乐金电子(天津)电器有限公司 | Double-volume compressor |
| CN101629515A (en) * | 2009-08-18 | 2010-01-20 | 刘佳骏 | Automatically varied crank-link mechanism of four-stroke internal combustion engine |
| CN103782031A (en) * | 2011-06-15 | 2014-05-07 | 惠而浦股份有限公司 | Mounting arrangement for a piston-connecting rod assembly in a refrigeration compressor |
| CN106996363A (en) * | 2017-05-27 | 2017-08-01 | 安徽美芝制冷设备有限公司 | The compression mechanism and reciprocating compressor of reciprocating compressor |
| CN112065690A (en) * | 2020-09-30 | 2020-12-11 | 珠海格力电器股份有限公司 | Compressor piston, compressor piston assembly, compressor and household appliance |
| CN112196998A (en) * | 2020-09-28 | 2021-01-08 | 珠海格力节能环保制冷技术研究中心有限公司 | Piston pin, piston assembly and reciprocating compressor |
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2020
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1477308A (en) * | 2002-08-19 | 2004-02-25 | 乐金电子(天津)电器有限公司 | Double-volume compressor |
| CN101629515A (en) * | 2009-08-18 | 2010-01-20 | 刘佳骏 | Automatically varied crank-link mechanism of four-stroke internal combustion engine |
| CN103782031A (en) * | 2011-06-15 | 2014-05-07 | 惠而浦股份有限公司 | Mounting arrangement for a piston-connecting rod assembly in a refrigeration compressor |
| CN106996363A (en) * | 2017-05-27 | 2017-08-01 | 安徽美芝制冷设备有限公司 | The compression mechanism and reciprocating compressor of reciprocating compressor |
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| CN112412748A (en) | 2021-02-26 |
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