阅读说明：本技术 曲轴、泵体、压缩机及制冷系统 (Crankshaft, pump body, compressor and refrigerating system ) 是由 罗蔼玉 魏会军 赵旭敏 彭慧明 马志强 李自好 于 2021-01-25 设计创作，主要内容包括：本发明提供一种曲轴、泵体、压缩机及制冷系统,曲轴包括：轴杆,轴杆的外周壁开设有凹槽；偏心轮,偏心轮套设在轴杆上且与轴杆偏心设置,偏心轮的内周壁开设有卡合槽；旋转体,旋转体可绕转轴旋转地支撑在凹槽处,轴杆沿第一方向转动时,旋转体的第一端卡合在卡合槽内,轴杆沿第二方向转动时,旋转体完全位于凹槽内。本发明曲轴分成三部分：轴杆、偏心轮和旋转体,轴杆沿第一方向转动(正转)时,旋转体旋转凸出轴杆带动偏心轮转动,一旦轴杆沿第二方向转动(反转)时,旋转体旋转完全位于凹槽内,使得轴杆空转,及时保护其他配合零部件,减少反转带来的损坏,具有反转保护功能,且工作性能可靠,显著提高了具有该曲轴的设备的使用寿命。(The invention provides a crankshaft, a pump body, a compressor and a refrigerating system, wherein the crankshaft comprises: the outer peripheral wall of the shaft rod is provided with a groove; the eccentric wheel is sleeved on the shaft rod and is eccentrically arranged with the shaft rod, and a clamping groove is formed in the inner peripheral wall of the eccentric wheel; the rotator, the rotator can support in recess department around the axis of rotation rotatoryly, and when the axostylus axostyle rotated along first direction, the first end block of rotator was in the block groove, and when the axostylus axostyle rotated along the second direction, the rotator was located the recess completely. The crankshaft of the invention is divided into three parts: the axostylus axostyle, eccentric wheel and rotator, when the axostylus axostyle rotated (corotation) along first direction, the rotatory salient axostylus axostyle of rotator drives the eccentric wheel and rotates, in case the axostylus axostyle rotates (reversal) along the second direction, the rotator is rotatory to be located the recess completely for the axostylus axostyle idles, in time protects other cooperation spare parts, reduces the damage that the reversal brought, has the reversal protect function, and working property is reliable, is showing the life who has improved the equipment.)

1. A crankshaft, comprising:

the outer peripheral wall of the shaft rod is provided with a groove;

the eccentric wheel is sleeved on the shaft rod and is eccentrically arranged with the shaft rod, and a clamping groove is formed in the inner peripheral wall of the eccentric wheel;

the rotating body is rotatably supported at the groove around a rotating shaft, when the shaft rod rotates along a first direction, the first end of the rotating body is clamped in the clamping groove, and when the shaft rod rotates along a second direction, the rotating body is completely positioned in the groove.

2. The crankshaft of claim 1, wherein:

the groove comprises a straight extension section and an arc section which are arranged in the radial direction of the shaft lever and are communicated with each other, and the width of an opening end of the arc section, which is positioned on the outer peripheral wall of the shaft lever, is larger than the width of the straight extension section in the circumferential direction of the shaft lever;

the rotating shaft is positioned in the arc-shaped section, and the second end of the rotating body can abut against the side wall of the straight section in the circumferential direction of the shaft rod.

3. The crankshaft of claim 2, wherein:

the rotating body comprises a first end wall and a second end wall, the extension length of the first end wall in the radial direction of the rotating shaft is smaller than that of the second end wall in the radial direction of the rotating shaft, a first end, far away from the rotating shaft, of the first end wall can be clamped in the clamping groove, and a second end, far away from the rotating shaft, of the second end wall can abut against a side wall, in the circumferential direction of the shaft rod, of the straight section.

4. The crankshaft of claim 3, wherein:

the rotating body further comprises an arc-shaped wall connected between the first end wall and the second end wall, and one end of the arc-shaped wall adjacent to the second end wall abuts against the side wall of the straight section in the circumferential direction of the shaft.

5. The crankshaft of claim 4, wherein:

the rotating shaft is located at the intersection position of the first end wall and the second end wall, and the central angle between the first end wall and the second end wall relative to the rotating shaft is larger than 180 degrees.

6. The crankshaft of claim 1, wherein:

the rotating shaft is arranged in parallel with the axial direction of the shaft lever.

7. The crankshaft of claim 1, wherein:

the two end walls of the groove in the axial direction of the shaft rod are respectively provided with a limiting groove, and the two ends of the rotating shaft are rotatably embedded into the two limiting grooves respectively.

8. The crankshaft of claim 1, wherein:

the cross section of the clamping groove is arc-shaped.

9. The crankshaft of claim 8, wherein:

the cross section of the clamping groove is in major arc arrangement.

10. A crankshaft according to any one of claims 1 to 9, wherein:

the oil duct is arranged on the shaft lever, the oil duct extends along the axis of the shaft lever and penetrates through one end of the shaft lever, and at least one oil guide hole communicated with the oil duct is formed in the outer peripheral wall of the shaft lever.

11. The crankshaft of claim 10, wherein:

and the oil guide hole is arranged opposite to the eccentric wheel in the radial direction of the shaft rod.

12. The pump body, including the bent axle, its characterized in that:

the crankshaft is as claimed in any one of claims 1 to 11.

13. Compressor, including the pump body, its characterized in that:

the pump body according to claim 12.

14. Refrigerating system, including the compressor, its characterized in that:

the compressor is the compressor of claim 13 above.

Technical Field

The invention relates to the technical field of compressors, in particular to a crankshaft, a pump body with the crankshaft, a compressor with the pump body and a refrigerating system with the compressor.

Background

The compressor is a driven fluid machine for lifting low-pressure gas into high-pressure gas, and is a heart of a refrigeration system.

In the traditional rolling rotor compressor, through the eccentric integral design of a crankshaft, a roller rolls along the inside of an air cylinder under the driving of the eccentric of the crankshaft, a crescent working cavity is formed between the roller and the air cylinder, the end part of a sliding sheet is in close contact with the roller under the action of spring force, the crescent working cavity is divided into two parts, a suction cavity communicated with an air suction port and a compression cavity at the other side. When the compressor works normally, the refrigerant enters the air suction cavity from the air suction port to be compressed and then is exhausted. In the actual operation process, an installer mistakenly connects the power lines of the compressor, the power lines are reversely connected to cause the motor to reversely rotate, so that the crankshaft is driven to reversely rotate, the original compression cavity becomes a suction low-pressure cavity, but the pressure difference cannot be built in the actual working cavity due to the fact that refrigerant is not supplemented, and the pump body of the compressor is in a vacuumizing state. Under this evacuation state, the compressor pump body oil circuit changes, and the unable sufficient refrigeration oil that supplyes of pump body inside destroys the normal lubrication of the pump body, increases the friction work of acting between the pump body spare part, leads to the pump body consumption to rise easily to lead to compressor overheat protection or overcurrent protection, therefore serious accidents such as the pump body card is dead, the motor burns out appear.

Disclosure of Invention

A first object of the present invention is to provide a crankshaft having a reverse rotation protection function and reliable operation performance, thereby remarkably improving the service life of equipment having the crankshaft.

A second object of the invention is to provide a pump body with the above crankshaft.

A third object of the present invention is to provide a compressor having the above pump body.

A fourth object of the present invention is to provide a refrigeration system having the above compressor.

In order to achieve the first object of the present invention, the present invention provides a crankshaft comprising: the outer peripheral wall of the shaft rod is provided with a groove; the eccentric wheel is sleeved on the shaft rod and is eccentrically arranged with the shaft rod, and a clamping groove is formed in the inner peripheral wall of the eccentric wheel; the rotator, the rotator can support in recess department around the axis of rotation rotatoryly, and when the axostylus axostyle rotated along first direction, the first end block of rotator was in the block groove, and when the axostylus axostyle rotated along the second direction, the rotator was located the recess completely.

By the scheme, when the compressor pump body normally operates, namely the shaft rod of the crankshaft rotates (rotates positively) along the first direction, the rotating body is synchronously driven to rotate positively, and the rotating body rotates around the rotating shaft under the action of the rotating centrifugal force, so that the first end of the rotating body protrudes out of the shaft rod and is clamped in the clamping groove of the eccentric wheel, the rotating body drives the eccentric wheel to rotate, and the compressor can normally work. When the compressor meets the wrong line and leads to the axostylus axostyle of bent axle to rotate (reversal) the operation along the second direction, the synchronous rotation of drive rotator, receive the effect of opposite rotation centrifugal force because of the rotator, rotator revolute axle antiport for the past recess internal rotation of first end of rotator, thereby inside the whole recess that is in the axostylus axostyle of rotator, the axostylus axostyle is in idle running state, plays the reversal guard action, prevents that the compressor from because of the axostylus axostyle reversal card dies or the motor is. The crankshaft of the invention is divided into three parts: the crankshaft comprises a shaft rod, an eccentric wheel and a rotating body, wherein when the shaft rod rotates forwards, the rotating body rotates to protrude the shaft rod to drive the eccentric wheel to rotate, once the shaft rod rotates reversely, the rotating body rotates to enable the whole shaft rod to be located inside a groove of the shaft rod, and the shaft rod idles, so that other matched parts can be protected in time when the shaft rod rotates reversely, damage caused by reverse rotation is reduced, abnormal protection is achieved, the crankshaft has a reverse rotation protection function, the working performance is reliable, and the service life of equipment with the crankshaft is obviously prolonged.

One preferred scheme is that the recess includes the section of stretching directly and the segmental arc that are arranged and are linked together in the footpath of axostylus axostyle, and in the circumference of axostylus axostyle, the width that the segmental arc is located the open end on the axostylus axostyle periphery wall is greater than the width of the section of stretching directly, and the pivot is located the segmental arc, but the second end butt of rotator is on the ascending lateral wall of the section of stretching directly in axostyl.

The rotating body comprises a first end wall and a second end wall, the extension length of the first end wall in the radial direction of the rotating shaft is smaller than that of the second end wall in the radial direction of the rotating shaft, a first end, far away from the rotating shaft, of the first end wall can be clamped in the clamping groove, and a second end, far away from the rotating shaft, of the second end wall can abut against a side wall, in the circumferential direction of the shaft rod, of the straight section.

In a further development, the rotating body further comprises an arcuate wall connected between the first end wall and the second end wall, and an end of the arcuate wall adjoining the second end wall abuts against a side wall of the straight section in the circumferential direction of the shaft.

Still further, the rotation shaft is located at an intersection of the first end wall and the second end wall, and a central angle between the first end wall and the second end wall with respect to the rotation shaft is greater than 180 °.

In a further aspect, the shaft is disposed parallel to the axial direction of the shaft.

The shaft rod is provided with a plurality of limiting grooves, and the two ends of the shaft rod are respectively embedded into the two limiting grooves in a rotating mode.

Further, the cross section of the clamping groove is arc-shaped.

The further proposal is that the cross section of the clamping groove is arranged in a major arc.

The oil duct has been seted up to the axostylus axostyle further to the scheme, and the oil duct extends and runs through the one end of axostylus axostyle along the axis of axostylus axostyle, and the periphery wall of axostylus axostyle is seted up at least one and is led the oilhole that is linked together with.

In a further embodiment, an oil guide opening is arranged radially opposite the eccentric wheel of the shaft lever.

In order to achieve the second object of the present invention, the present invention provides a pump body, which includes a crankshaft, wherein the crankshaft is the crankshaft.

In order to achieve the third object of the present invention, the present invention provides a compressor, which includes a pump body, wherein the pump body is the above pump body.

In order to achieve the fourth object of the present invention, the present invention provides a refrigeration system, which includes a compressor, wherein the compressor is the above-mentioned compressor.

Drawings

FIG. 1 is a block diagram of an embodiment of the pump body of the present invention.

FIG. 2 is a cross-sectional view of an embodiment of the pump body of the present invention.

Figure 3 is an exploded view of an embodiment of the pump body of the present invention.

FIG. 4 is a block diagram of the shaft and rotor mating configuration in a pump body embodiment of the present invention.

FIG. 5 is a cross-sectional view of the shaft and rotor mating in a pump body embodiment of the present invention.

FIG. 6 is a top view of a rotor in an embodiment of the pump body of the present invention.

FIG. 7 is a cross-sectional view of a shaft in an embodiment of a pump body of the present invention.

Figure 8 is a cross-sectional view of a first operating condition of an embodiment of the pump body according to the invention.

Fig. 9 is an enlarged view of fig. 8 at a.

Figure 10 is a cross-sectional view of a second operating condition of an embodiment of the pump body according to the invention.

Fig. 11 is an enlarged view of fig. 10 at B.

The invention is further explained with reference to the drawings and the embodiments.

Detailed Description

The following embodiments are directed to the pump body of the present invention, and since the pump body of the present invention employs the crankshaft of the present invention, the embodiments of the crankshaft have been described in the description of the embodiments of the pump body.

Referring to fig. 1 to 3, the pump body 1 includes a crankshaft 2, a roller 4, a cylinder 3, a sliding vane 5 and a lower flange 6, the crankshaft 2 includes a shaft 21, an eccentric 22 and a rotator 23, the eccentric 22 is disposed on the shaft 21 and eccentric to the shaft 21, the roller 4 is disposed on the eccentric 22, the cylinder 3 is disposed on the roller 4, and the lower flange 6 is disposed on the shaft 21 and abuts against an axial end surface of the cylinder 3. Wherein, the cylinder 3 is provided with a slide sheet groove (not marked), the slide sheet 5 slides along the slide sheet groove, and one end of the slide sheet is pressed against the roller 4 under the action of the elastic force of the elastic piece. The roller 4 rolls along the inside of the cylinder 3 under the driving of the eccentric wheel 22 of the crankshaft 2, and forms a crescent working cavity with the cylinder 3, the sliding sheet 5 makes one end of the sliding sheet closely contact with the roller 4 under the action of elastic force, and divides the crescent working cavity into two parts, a suction cavity communicated with the suction port and a compression cavity at the other side. When the compressor pump body 1 works normally, the refrigerant enters the air suction cavity from the air suction port to be compressed, and then high-temperature and high-pressure refrigerant gas is discharged to provide power for the refrigeration cycle.

Referring to fig. 4 to 7, in the present embodiment, the outer peripheral wall of the shaft 21 of the crankshaft 2 is formed with a groove 26, the inner peripheral wall of the eccentric wheel 22 of the crankshaft 2 is formed with an engaging groove 221, the rotating body 23 of the crankshaft 2 is rotatably supported at the groove 26 around the rotating shaft 27, when the shaft 21 rotates in the first direction, the first end of the rotating body 23 is engaged in the engaging groove 221, and when the shaft 21 rotates in the second direction, the rotating body 23 is completely located in the groove 26. In this embodiment, the rotating shaft 27 is disposed parallel to the axial direction of the shaft 21.

Referring to fig. 8 and 9, when the compressor pump body 1 operates normally, that is, the shaft 21 of the crankshaft 2 rotates in the first direction (forward rotation), the rotating body 23 is synchronously driven to rotate forward, and the rotating body 23 rotates around the rotating shaft 27 under the action of the rotating centrifugal force, so that the first end of the rotating body 23 protrudes out of the shaft 21 and is clamped in the clamping groove 221 of the eccentric wheel 22, and the rotating body 23 drives the eccentric wheel 22 to rotate, so that the compressor pump body 1 can operate normally.

Referring to fig. 10 and 11, when the compressor is connected to the wrong line, the shaft 21 of the crankshaft 2 rotates (rotates reversely) in the second direction, the rotating body 23 is synchronously driven to rotate reversely, and the rotating body 23 rotates reversely around the rotating shaft 27 under the action of the reverse rotating centrifugal force, so that the first end of the rotating body 23 rotates toward the groove 26, the whole rotating body 23 is located inside the groove 26 of the shaft 21, the shaft 21 is in an idle state, and the reverse rotation protection effect is achieved, and the compressor is prevented from being locked due to the reverse rotation of the shaft 21 or being burnt out of the motor due to excessive current.

The crankshaft 2 of the present embodiment is divided into three parts: axostylus axostyle 21, eccentric wheel 22 and rotator 23, axostylus axostyle 21 corotation, the rotatory protruding axostylus axostyle 21 of rotator 23 drives eccentric wheel 22 and rotates, in case when axostylus axostyle 21 reverses, rotator 23 is rotatory to make whole inside being in the recess 26 of axostylus axostyle 21, axostylus axostyle 21 idles, thereby can in time protect other cooperation spare parts when axostylus axostyle 21 reverses, reduce the damage that the reversal brought, play unusual protection, reverse rotation protect function has, and the working property is reliable.

The groove 26 of the shaft 21 is used for placing the rotating body 23 and limiting the rotating body 23, so that the rotating body 23 does not protrude out of the shaft 21 when the shaft 21 idles, and the first end of the rotating body 23 protrudes out of the shaft 21 and is linked with the positioning of the eccentric wheel 22 when the eccentric wheel 22 works. Specifically, the groove 26 includes a straight section 261 and an arc-shaped section 262 which are arranged in the radial direction of the shaft 21 and communicate with each other, and the width of the opening end of the arc-shaped section 262 on the outer peripheral wall of the shaft 21 in the circumferential direction of the shaft 21 is larger than the width of the straight section 261. The rotating shaft 27 is located in the arc-shaped section 262, and the second end of the rotating body 23 can abut on the sidewall of the straight section 261 in the circumferential direction of the shaft 21.

The rotating body 23 of the present embodiment includes a first end wall 231 and a second end wall 232, an extension length L1 of the first end wall 231 in the radial direction of the rotating shaft 27 is smaller than an extension length L2 of the second end wall 232 in the radial direction of the rotating shaft 27, a first end of the first end wall 231 away from the rotating shaft 27 may be engaged in the engaging groove 221, and a second end of the second end wall 232 away from the rotating shaft 27 may abut on a side wall of the straight section 261 in the circumferential direction of the shaft 21. Furthermore, the rotating body 23 further includes an arc-shaped wall 233 connected between the first end wall 231 and the second end wall 232, and an end of the arc-shaped wall 233 adjacent to the second end wall 232 abuts on a side wall of the straight section 261 in the circumferential direction of the shaft 21.

Wherein the rotation shaft 27 is located at the intersection position of the first end wall 231 and the second end wall 232, and the central angle θ between the first end wall 231 and the second end wall 232 with respect to the rotation shaft 27 is greater than 180 °. The two end walls of the groove 26 in the axial direction of the shaft 21 are respectively opened with a limiting groove (not labeled), and two ends of the rotating shaft 27 are rotatably embedded into the two limiting grooves respectively. The cross section of the engaging groove 221 of the eccentric wheel 22 of the present embodiment is arc-shaped, and preferably, the cross section of the engaging groove 221 is arc-shaped.

The rotating body 23 is hinged at the groove 26 of the shaft 21 by a rotating shaft 27 to be rotatable within a certain range, the rotating stroke of the rotating body 23 is limited by the groove 26 of the shaft 21, and the rotating position is realized by changing the extension length of the first end wall 231 and the second end wall 232 of the rotating body 23 in the radial direction of the rotating shaft 27. When the shaft lever 21 rotates forward, the first end of the rotating body 23 is engaged in the engaging groove 221 of the eccentric wheel 22 to drive the eccentric wheel 22 and the shaft lever 21 to rotate forward synchronously, so that the normal working effect of the equipment is achieved, and the reliability of the working performance is greatly improved.

In addition, in the present embodiment, the shaft 21 is provided with the oil passage 24, the oil passage 24 extends along the axis of the shaft 21 and penetrates through one end of the shaft 21, the outer peripheral wall of the shaft 21 is provided with a plurality of oil guiding holes 25 communicated with the oil passage 24, one of the oil guiding holes 25 is disposed opposite to the eccentric wheel 22 in the radial direction of the shaft 21, and the lubricating effect of the crankshaft 2 during the rotation process can be effectively improved.

The above embodiments are merely preferred examples of the present invention, and not intended to limit the scope of the invention, so that equivalent changes or modifications made based on the structure, characteristics and principles of the invention as claimed should be included in the claims of the present invention.