CN103047108A - Variable-aperture cylinder seat applied to refrigeration compressors - Google Patents
Variable-aperture cylinder seat applied to refrigeration compressors Download PDFInfo
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- CN103047108A CN103047108A CN 201110311720 CN201110311720A CN103047108A CN 103047108 A CN103047108 A CN 103047108A CN 201110311720 CN201110311720 CN 201110311720 CN 201110311720 A CN201110311720 A CN 201110311720A CN 103047108 A CN103047108 A CN 103047108A
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Abstract
The invention relates to parts of refrigeration compressors, particularly to a variable-aperture cylinder seat applied to refrigeration compressors. The cylinder seat is provided with a seat body, a crank shaft hole is designed in the middle of the seat body, a cylinder head is designed on one side of the seat body, and a cylinder hole is opened in the cylinder head. The cylinder seat is characterized in that the cylinder hole in the cylinder head is step-shaped, the aperture of the section close to the outer side of the cylinder head is smaller, and the aperture of the section on the inner side is larger. According to the cylinder seat, friction force of a piston during reciprocation in the cylinder hole is reduced, the friction power consumption of the refrigeration compressors can be reduced, and the mechanical efficiency of the refrigeration compressors can be improved; and the clearance cavity is enlarged and can store more lubricating oil, good lubricating conditions can be provided for reciprocation of the piston, and the cylinder seat is particularly suitable for improvement of cylinder seats of piston refrigeration compressors.
Description
(i) technical field: the present invention relates to the component technological improvement of refrigeration compressor, especially a kind of change aperture cylinder block that is applied to refrigeration compressor.
(ii) background technique: in refrigeration compressor, piston to-and-fro motion in the cylinder hole, the operation such as compress to the refrigerant vapor sucked, thereby complete the process of refrigerastion of compressor.In order to guarantee the refrigeration of compressor, piston must have good tightness during to-and-fro motion in the cylinder hole, and therefore, the matching gap in piston and cylinder hole is unsuitable excessive; Simultaneously, the frictional force when reducing reciprocating motion of the pistons, avoid the generation of dry friction phenomenon and the compressor stuck phenomenon in piston and cylinder hole, and the matching gap in piston and cylinder hole is unsuitable too small.At present, in existing refrigeration compressor, the cylinder hole of cylinder block is divided into two kinds, straight shape cylinder hole and taper cylinder hole, and the internal surface in straight shape cylinder hole is cylindrical, and aperture, cylinder hole is constant; The internal surface in taper cylinder hole is comprised of cylindrical and conical two-part, cylindrical cylinder bore portion cylinder bore dia zero draft, and aperture is constant; There is certain tapering in aperture, conical cylinder hole, and pore size is pressed tapering and changed.Straight shape cylinder hole is with respect to taper cylinder hole, and straight shape cylinder hole is easy to process.During due to reciprocating motion of the pistons, must guarantee good tightness, the matching gap in piston and cylinder hole is less, lubricant oil in the cavity volume of gap is less, during reciprocating motion of the pistons in the cavity volume of gap the internal friction of lubricant oil larger, cause the friction power loss of refrigeration compressor larger, on the other hand because the gap cavity volume is little, during reciprocating motion of the pistons, the supply of lubricant oil may be not enough, there will be the dry friction phenomenon, easily make the parts wear of refrigeration compressor, more serious meeting causes refrigeration compressor stuck fault to occur.The tightness of taper cylinder hole when guaranteeing reciprocating motion of the pistons, the cylindrical cylinder bore portion in taper cylinder hole and the matching gap of piston are less, simultaneously in order to reduce the generation of dry friction and stuck phenomenon, the conical cylinder bore portion in taper cylinder hole cylindrical cylinder bore portion relative to the matching gap of piston is large, conical cylinder bore portion has increased the matching gap in piston and cylinder hole, matching gap increases, the gap cavity volume increases, lubricant oil in the cavity volume of gap is more, during reciprocating motion of the pistons, the internal friction less of lubricant oil in the cavity volume of gap, reduced the friction power loss of refrigeration compressor, in addition because the lubricant oil accumulated in the cavity volume of gap is more, can provide good lubricating condition for reciprocating motion of the pistons, the stuck rate of breakdown of refrigeration compressor also can decrease, but taper cylinder hole requirement on machining accuracy is higher, difficulty of processing and processing cost are all higher.Existing cylinder block cylinder hole is that straight shape cylinder hole or ，Qi Gang hole, taper cylinder hole are all one section, and the cylinder hole does not have the stairstepping obviously jumped, and existing cylinder block sectional view as shown in Figure 1.
(iii) summary of the invention: purpose of the present invention is exactly to overcome the problems referred to above that existing cylinder block exists, reduce piston in cylinder block cylinder hole during to-and-fro motion, the internal friction of lubricant oil in piston and cylinder block cylinder hole matching gap, reduce the frictional force of refrigeration compressor, reduce the friction power loss of compressor; For reciprocating motion of the pistons provides good lubricating condition, avoid occurring the dry friction phenomenon, a kind of change aperture cylinder block that is applied to refrigeration compressor is provided.
Concrete scheme of the present invention is: for existing cylinder block, improved, it has pedestal, middle part at pedestal is designed with crankshaft hole, one side of pedestal is designed with cylinder head, offer the cylinder hole in cylinder head, it is characterized in that: the cylinder hole in described cylinder head is stepped, and less by one sector hole footpath, the cylinder head outside, an inboard sector hole footpath is larger.
Large and small aperture in the hole of cylinder described in the present invention differs 0.25mm～3mm.
Hole diameter in the hole of cylinder described in the present invention is 15～40mm, and little hole length is 20～40mm.
Large bore dia in cylinder of the present invention hole is 15.25～43mm, and large hole length is 5～20mm.
Of the present inventionly be designed with exhaust cavity or air aspiration cavity in the cylinder head both sides or be designed with air aspiration cavity and exhaust cavity simultaneously pedestal is upper.
Principle of the present invention is: in the movement process of piston compression refrigeration steam and exhaust in the section of small aperture, cylinder hole, piston is very large to the pressure of refrigerant vapor, the lateral force to cylinder block cylinder hole of piston is also very large, especially in the second half section stroke, piston can reach peak value to the pressure of refrigerant vapor and the lateral force in cylinder hole.Piston can make piston depart from the cylinder axially bored line along the straight line motion of cylinder axially bored line to the lateral force in cylinder hole, and this lateral force can act on the oil film in piston and cylinder hole matching gap, and then acts on the inwall of cylinder hole.Because Wai Duande aperture, cylinder hole in this design is less, the matching gap of itself and piston is also less, oil slick thickness is less, the piston linear motion departs from the cylinder axially bored line a little, cylinder hole inwall can apply an active force with the lateral force opposite direction to piston by oil film, guarantee that piston moves along the cylinder axially bored line, can off-axis.If in this section stroke, the matching gap in piston and cylinder hole is larger, and oil film is thicker, because piston is larger to the lateral force in cylinder hole, can make the motion off-axis of piston, makes the bumpy motion of piston, and the motion of compressor will be not steady, produces vibrating noise; If in this section stroke, the matching gap in piston and cylinder hole is very little, oil film is very thin, the motion of piston can not depart from the cylinder axially bored line, but it is lubricated fully that very thin oil film can make the to-and-fro motion of piston can not get, there will be the dry friction phenomenon, cause the wearing and tearing of refrigeration compressor component, stuck phenomenon can occur in compressor.So, in this section stroke, the matching gap of piston and small aperture, cylinder hole section is designed to 0.005mm～0.015mm, the length of aperture is 20mm～40mm.If what this section carried out is expansion or the breathing process of compressor, in this process, piston is less to the lateral force of cylinder inner wall, and the motion that 0.005mm～0.015mm matching gap makes piston can off-axis, has guaranteed that the motion of piston is steady.
In the movement process of piston compression refrigeration steam in the section of large aperture, cylinder hole, in piston and cylinder hole matching gap, be full of lubricant oil, the motion of the relative cylinder of piston hole inwall.From fluid mechanics, lubricant oil, for hindering this motion in the relative cylinder of piston hole, can produce internal friction in lubricant oil, and this internal friction is relevant with the thickness of lubricant oil in the cavity volume of gap, and thickness is larger, and the internal friction of lubricant oil is less.Therefore internal friction move in the section of large aperture, cylinder hole in claiming in order to reduce piston, need to increase the matching gap of piston and large aperture, cylinder hole section, increase gap cavity volume, increase lubricant oil thickness.But piston is in this section movement process, piston has lateral force to cylinder block cylinder hole, though this lateral force is little, if but matching gap is excessive, lubricant oil is too thick, and this lateral force can make the motion of piston depart from the cylinder axially bored line, causes piston movement not steady, therefore compressor also can produce vibrating noise, has reduced the mechanical efficiency of refrigeration compressor.So, in this section stroke, the matching gap of piston and large aperture, cylinder hole section is designed to 0.01mm～2mm, the length of large aperture, cylinder hole section is 5mm～20mm.If what this section carried out is exhaust or the breathing process of compressor, by the cooperation of two sections of cylinder hole sizes, the motion that can make compressor piston can off-axis, has guaranteed that the motion of piston is steady.
The present invention has the following advantages:
1. can reduce the cylindricity requirement to the cylinder hole, can well guarantee in production process, needn't drop into the surveying instrument of higher-end, can reduce waste product, enhance productivity.
2. because the cylinder hole is stair-stepping change aperture, during reciprocating motion of the pistons, at the larger end of cylinder bore dia, piston and cylinder hole matching gap large (with respect to taper cylinder hole and straight shape cylinder hole), in gap, the internal friction of lubricant oil is less, can reduce the friction power loss of refrigeration compressor, improves mechanical efficiency.
3. because the cylinder hole has adopted stair-stepping change aperture, like this, piston and cylinder interporal lacuna cavity volume increase, can accumulate more lubricant oil, in the piston reciprocating running, this lubricant oil can have good lubricated, vibration damping and cooling effect to the cylinder hole, because the kinematic pair temperature reduces, and the wearing and tearing in movement process reduce, working life of elongated component preferably, the working life of simultaneously improving whole refrigeration compressor.
(iv) accompanying drawing explanation: the three-dimensional cutaway view of the existing cylinder block of Fig. 1;
Fig. 2 is three-dimensional cutaway view of the present invention;
Fig. 3 is the plan view of general structure of the present invention;
In figure: 1-pedestal, 2-crankshaft hole, 3-exhaust cavity, 4-cylinder head, 5-cylinder hole, 6-air aspiration cavity.
(v) embodiment:
Referring to Fig. 2,3, the present invention has pedestal 1, at the middle part of pedestal 1, is designed with crankshaft hole 2, one side of pedestal 1 is designed with cylinder head 4, offers cylinder hole 5 in cylinder head 4, and particularly: the cylinder hole 5 in cylinder head 4 is stepped, less by one sector hole footpath, cylinder head 4 outside, an inboard sector hole footpath is larger.
Large and small aperture in cylinder of the present invention hole 5 differs 0.25mm～3mm, is specially 1mm.
Hole diameter in cylinder of the present invention hole 5 is 15～40mm, is specially 20mm, and little hole length is 20～40mm, is specially 30mm.
Large bore dia in cylinder of the present invention hole 5 is 15.25～43mm, is specially 21mm, and large hole length is 5～20mm, is specially 15mm.
Claims (5)
1. a change aperture cylinder block that is applied to refrigeration compressor, there is pedestal, middle part at pedestal is designed with crankshaft hole, one side of pedestal is designed with cylinder head, offer the cylinder hole in cylinder head, it is characterized in that: the cylinder hole in described cylinder head is stepped, and less by one sector hole footpath, the cylinder head outside, an inboard sector hole footpath is larger.
2. a kind of change aperture cylinder block that is applied to refrigeration compressor according to claim 1, it is characterized in that: the large and small aperture in described cylinder hole differs 0.25mm～3mm.
3. a kind of change aperture cylinder block that is applied to refrigeration compressor according to claim 1 and 2, it is characterized in that: the hole diameter in described cylinder hole is 15～40mm, little hole length is 20～40mm.
4. a kind of change aperture cylinder block that is applied to refrigeration compressor according to claim 1 and 2, it is characterized in that: the large bore dia in described cylinder hole is 15.25～43mm, large hole length is 5～20mm.
5. a kind of change aperture cylinder block that is applied to refrigeration compressor according to claim 1 is characterized in that: be designed with exhaust cavity or air aspiration cavity in the cylinder head both sides or be designed with air aspiration cavity and exhaust cavity simultaneously pedestal is upper.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110311720 CN103047108A (en) | 2011-10-14 | 2011-10-14 | Variable-aperture cylinder seat applied to refrigeration compressors |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110311720 CN103047108A (en) | 2011-10-14 | 2011-10-14 | Variable-aperture cylinder seat applied to refrigeration compressors |
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| Publication Number | Publication Date |
|---|---|
| CN103047108A true CN103047108A (en) | 2013-04-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201110311720 Pending CN103047108A (en) | 2011-10-14 | 2011-10-14 | Variable-aperture cylinder seat applied to refrigeration compressors |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108302003A (en) * | 2018-04-08 | 2018-07-20 | 黄石东贝电器股份有限公司 | A kind of synchronous double-cylinder refrigeration compressor |
| CN108412725A (en) * | 2018-04-08 | 2018-08-17 | 黄石东贝电器股份有限公司 | A kind of asynchronous double-cylinder refrigeration compressor |
-
2011
- 2011-10-14 CN CN 201110311720 patent/CN103047108A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108302003A (en) * | 2018-04-08 | 2018-07-20 | 黄石东贝电器股份有限公司 | A kind of synchronous double-cylinder refrigeration compressor |
| CN108412725A (en) * | 2018-04-08 | 2018-08-17 | 黄石东贝电器股份有限公司 | A kind of asynchronous double-cylinder refrigeration compressor |
| CN108412725B (en) * | 2018-04-08 | 2024-02-06 | 黄石东贝压缩机有限公司 | Asynchronous double-cylinder refrigeration compressor |
| CN108302003B (en) * | 2018-04-08 | 2024-02-06 | 黄石东贝压缩机有限公司 | Synchronous double-cylinder refrigeration compressor |
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Application publication date: 20130417 |