阅读说明：本技术 冷却轴活塞 (Cooling shaft piston ) 是由 巴鹏 江泽磊 巴和平 于 2019-10-29 设计创作，主要内容包括：本发明属往复压缩机配件领域,尤其涉及一种冷却轴活塞,包括活塞体(2)、活塞杆体(5)、第一密封双隔室(13)及第二密封双隔室(14)；活塞体(2)包括前半活塞体(201)及后半活塞体(202)；在活塞体(2)的内部上下依次分别对称设有上活塞体空腔(22)及下活塞体空腔(23)；在活塞体(2)右侧设有第一密封双隔室(13)及第二密封双隔室(14)；活塞杆体(5)穿过第一密封双隔室(13)及第二密封双隔室(14)并与第一密封双隔室(13)及第二密封双隔室(14)动配合。本发明可在活塞体、活塞杆体、第一密封双隔室及第二密封双隔室内形成冷却介质多路循环,可实现活塞连杆内部冷却,冷却效率高,生产成本低。(The invention belongs to the field of reciprocating compressor accessories, and particularly relates to a cooling shaft piston which comprises a piston body (2), a piston rod body (5), a first sealed double-compartment (13) and a second sealed double-compartment (14); the piston body (2) comprises a front half piston body (201) and a rear half piston body (202); an upper piston body cavity (22) and a lower piston body cavity (23) are respectively and symmetrically arranged in the piston body (2) from top to bottom in sequence; a first sealed double-compartment (13) and a second sealed double-compartment (14) are arranged on the right side of the piston body (2); the piston rod body (5) penetrates through the first sealed double-compartment (13) and the second sealed double-compartment (14) and is movably matched with the first sealed double-compartment (13) and the second sealed double-compartment (14). The invention can form multi-path circulation of cooling medium in the piston body, the piston rod body, the first sealed double-compartment and the second sealed double-compartment, can realize the internal cooling of the piston connecting rod, and has high cooling efficiency and low production cost.)

1. A cooling shaft piston is characterized by comprising a piston body (2), a piston rod body (5), a first sealed double-compartment (13) and a second sealed double-compartment (14);

the piston body (2) comprises a front half piston body (201) and a rear half piston body (202); the end part of the front half piston body (201) is transversely and fixedly connected with the end part of the rear half piston body (202); an upper piston body cavity (22) and a lower piston body cavity (23) are respectively and symmetrically arranged in the piston body (2) from top to bottom in sequence; a piston rod body assembling channel (24) is transversely arranged in the middle area of the piston body (2); the front end of the piston rod body (5) is fixedly connected with the front end of the front half piston body (201) through a piston rod body assembling channel (24);

a rod body front end cavity (25) and a rod body rear end cavity (26) are transversely and sequentially arranged in the piston rod body (5); a piston rod core (8) is transversely and fixedly arranged in the rod body rear end cavity (26) to form an upper rear end cavity (261) and a lower rear end cavity (262) which are independent of each other; one end of the lower rear end cavity (262) is communicated with the front end cavity (25) of the rod body through a through hole (30); the lower part of the cavity (25) at the front end of the rod body is provided with a second open pore (17); the front end cavity (25) of the rod body is communicated with the lower piston body cavity (23) through a second opening (17); an upper piston body through hole (27) is formed in the lower portion of the upper piston body cavity (22); a lower piston body through hole (28) is arranged at the upper part of the lower piston body cavity (23); a rod body front end through hole (29) is arranged at the upper part of the rod body front end cavity (25); the lower piston body cavity (23) is respectively communicated with the rod body front end cavity (25) and the upper piston body cavity (22) through a lower piston body through hole (28), a rod body front end through hole (29) and an upper piston body through hole (27); a third opening (18) is formed in the upper portion of the upper rear end cavity (261); the upper piston body cavity (22) is communicated with the upper rear end cavity (261) through a third opening (18);

a first sealed double-compartment (13) and a second sealed double-compartment (14) are sequentially and fixedly arranged on the right side of the piston body (2) at a certain interval; the piston rod body (5) penetrates through the first sealed double-compartment (13) and the second sealed double-compartment (14) and is movably matched with the first sealed double-compartment (13) and the second sealed double-compartment (14); a fourth opening (19) communicated with the low-pressure cooling liquid return region (141) is formed in the upper portion of the upper rear end cavity (261); a first opening (16) communicated with the high-pressure low-temperature cooling liquid area (131) is formed in the lower portion of the lower rear end cavity (262); the maximum left stroke of the first opening (16) does not exceed the left wall of the first sealed double-compartment (13); the maximum distance of the fourth opening (19) to the right does not exceed the right wall of the second sealed double compartment (14).

2. The cooled shaft piston of claim 1, wherein: the front half piston body (201) and the rear half piston body (202) are sequentially sleeved with the piston ring (3) respectively.

3. The cooled shaft piston of claim 2, wherein: the front half piston body (201) and the rear half piston body (202) are respectively sleeved with a supporting ring (4) in sequence.

4. The cooled shaft piston of claim 3, wherein: an oil pipeline (20) is arranged between the upper piston body cavity (22) and the lower piston body cavity (23).

5. The cooled shaft piston of claim 4, wherein: and a sealing gasket (7) is arranged at the joint of the piston body (2) and the piston rod body (5).

6. The cooled shaft piston of claim 5, wherein: and a second cylindrical pin (21) is fixedly arranged between the front half piston body (201) and the rear half piston body (202).

7. The cooled shaft piston of claim 6, wherein: the right end of the piston rod body (5) is connected with an oil cooling pipe component (10); a connecting pad (9) and a plug (11) are arranged between the oil cooling pipe component (10) and the piston rod body (5); an O-shaped ring (12) is connected to the right side of the oil cooling pipe component (10); a cooling annular cavity (31) is arranged between the outer wall of the oil cooling pipe component (10) and the hollow inner wall of the piston rod body (5); and a piston rod body right side oil inlet (32) and a piston rod body right side oil outlet (33) are respectively arranged on the piston rod body (5).

Technical Field

The invention belongs to the field of reciprocating compressor accessories, and particularly relates to a cooling shaft piston.

Background

In the design process of the reciprocating compressor, the cooling design of the piston is important. The traditional piston cooling modes such as free jet cooling without an oil cavity, coiled pipe circulating cooling and vibration cooling cannot achieve ideal cooling effects. Cooling means heat loss, but such loss is necessary to ensure proper operation of the piston. If the piston is cooled too much, the following adverse effects occur: 1) the heat loss is too large, and the working efficiency of the piston is reduced; 2) the temperature difference is too large, and the thermal stress is too high; 3) the cost is increased by increasing the amount of the coolant. Moreover, the traditional piston cooling mode is mostly external cavity cooling, the cooling efficiency is lower, and the cooling cost is higher.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provides the cooling shaft piston which can realize the internal cooling of the piston connecting rod and has high cooling efficiency and low production cost.

In order to solve the technical problem, the invention is realized as follows:

a cooling shaft piston comprises a piston body, a piston rod body, a first sealed double-compartment and a second sealed double-compartment;

the piston body comprises a front half piston body and a rear half piston body; the end part of the front half piston body is transversely fixedly connected with the end part of the rear half piston body; an upper piston body cavity and a lower piston body cavity are respectively symmetrically arranged in the piston body up and down in sequence; a piston rod body assembling channel is transversely arranged in the middle area of the piston body; the front end of the piston rod body is fixedly connected with the front end of the front half piston body through the piston rod body assembling channel;

a rod body front end cavity and a rod body rear end cavity are transversely and sequentially arranged in the piston rod body; a piston rod core is transversely and fixedly arranged in the rear end cavity of the rod body so as to form an upper rear end cavity and a lower rear end cavity which are independent of each other; one end of the lower rear end cavity is communicated with the cavity at the front end of the rod body through a through hole; the lower part of the cavity at the front end of the rod body is provided with a second opening; the cavity at the front end of the rod body is communicated with the cavity of the lower piston body through a second opening; an upper piston body through hole is formed in the lower portion of the upper piston body cavity; the upper part of the cavity of the lower piston body is provided with a through hole of the lower piston body; the upper part of the cavity at the front end of the rod body is provided with a through hole at the front end of the rod body; the lower piston body cavity is respectively communicated with the rod body front end cavity and the upper piston body cavity through a lower piston body through hole, a rod body front end through hole and an upper piston body through hole; a third opening is formed in the upper portion of the upper rear end cavity; the cavity of the upper piston body is communicated with the cavity of the upper rear end through a third opening;

a first sealed double-compartment and a second sealed double-compartment are sequentially and fixedly arranged on the right side of the piston body at intervals; the piston rod body penetrates through the first sealed double-compartment and the second sealed double-compartment and is in movable fit with the first sealed double-compartment and the second sealed double-compartment; a fourth opening communicated with the low-pressure cooling liquid reflux area is formed in the upper part of the upper rear end cavity; a first opening communicated with the high-pressure low-temperature cooling liquid area is formed in the lower portion of the lower rear end cavity; the maximum left stroke of the first opening hole does not exceed the left wall of the first sealed double-compartment; the maximum right stroke of the fourth hole does not exceed the right wall of the second sealed double-compartment.

As a preferable scheme, the front half piston body and the rear half piston body are respectively sleeved with a piston ring in sequence.

Furthermore, the front half piston body and the rear half piston body are sequentially sleeved with the supporting rings respectively.

Furthermore, an oil pipeline is arranged between the cavity of the upper piston body and the cavity of the lower piston body.

Furthermore, the joint of the piston body and the piston rod body is provided with a sealing gasket.

Furthermore, a second cylindrical pin is fixedly arranged between the front half piston body and the rear half piston body.

Furthermore, the right end of the piston rod body is connected with an oil cooling pipe component; connecting a gasket and a plug between the oil cooling pipe component and the piston rod body; the right side of the oil-cooled pipe part is connected with an O-shaped ring; a cooling annular cavity is arranged between the outer wall of the oil cooling pipe part and the hollow inner wall of the piston rod body; and the piston rod body is respectively provided with a piston rod body right side oil inlet and a piston rod body right side oil outlet.

In the present invention, the coolant enters the lower rear cavity 262 from the first opening 16 of the high-pressure low-temperature coolant zone 131, thereby cooling the lower portion of the rear end of the piston rod. When the cooling fluid is full, it enters the lower piston body cavity 23 through the second opening 17. Under the action of gravity, when the cavity is filled with the cooling liquid, the cooling liquid enters the upper piston body cavity 22 through the oil pipeline, and therefore the piston body is cooled. When the upper piston body cavity 22 is filled with cooling liquid, it enters the upper back end cavity 261 through the third openings 18, thereby cooling the upper part of the piston rod. When the cooling liquid is full, the cooling liquid flows into the low-pressure cooling liquid reflux area 141 through the fourth hole 19. The whole process realizes the cooling of the shaft piston from the inside. According to the invention, through the combined structure design of the piston body, the piston rod body, the first sealed double-compartment and the second sealed double-compartment, the cooling medium channel is arranged on the piston body and the piston rod body, and then the multi-path circulation of the cooling medium is formed in the piston body, the piston rod body, the first sealed double-compartment and the second sealed double-compartment. The design is suitable for various reciprocating compressor shaft pistons, the thermal fatigue and the thermal stress of the piston can be effectively prevented from being overlarge, the internal cooling of the shaft piston is realized, the service life of the piston is prolonged, and the cooling efficiency is improved.

Drawings

The invention is further described with reference to the following figures and detailed description. The scope of the invention is not limited to the following expressions.

Fig. 1 is a schematic view of the overall structure of the present invention.

FIG. 2 is a schematic view of a piston rod body structure according to the present invention.

Fig. 3 is a schematic view of the piston rod core structure of the present invention.

FIG. 4 is a cross-sectional view taken along the line A-A and the line B-B in FIG. 3 according to the present invention.

Fig. 5 is an assembly view of a piston body of the present invention.

In the figure: 1. a nut; 2. a piston body; 201. a front half piston body; 202. a rear half piston body; 3. a piston ring; 4. a supporting ring; 5. a piston rod body; 7. a sealing gasket; 8. a piston rod core; 9. a pad; 10. an oil-cooled pipe section; 11. a plug; 12. an O-shaped ring; 13. a first sealed dual compartment; 131. a high pressure cryogenic coolant zone; 14. a second sealed double compartment; 141. a low pressure coolant reflux zone; 15. a first cylindrical pin; 16. a first opening; 17. a second opening; 18. a third opening; 19. a fourth opening; 20. an oil pipeline; 21. a second cylindrical pin; 22. an upper piston body cavity; 23. a lower piston body cavity; 24. a piston rod body assembly channel; 25. a cavity at the front end of the rod body; 26. a cavity at the rear end of the rod body; 261. an upper rear end cavity; 262. a lower rear end cavity; 27. an upper piston body through hole; 28. a lower piston body through bore; 29. a through hole is arranged at the front end of the rod body; 30. a through hole; 31. cooling the annular cavity; 32. an oil inlet at the right side of the rod body; 33. the right side oil outlet of the rod body.

Detailed Description

As shown in fig. 1 and 2, the cooling shaft piston comprises a piston body 2, a piston rod body 5, a first sealed double compartment 13 and a second sealed double compartment 14;

the piston body 2 comprises a front half piston body 201 and a rear half piston body 202; the end part of the front half piston body 201 is transversely fixedly connected with the end part of the rear half piston body 202; an upper piston body cavity 22 and a lower piston body cavity 23 are respectively and symmetrically arranged in the piston body 2 from top to bottom; a piston rod body assembling channel 24 is transversely arranged in the middle area of the piston body 2; the front end of the piston rod body 5 is fixedly connected with the front end of the front half piston body 201 through a piston rod body assembling channel 24;

a rod body front end cavity 25 and a rod body rear end cavity 26 are transversely and sequentially arranged in the piston rod body 5; a piston rod core 8 is transversely and fixedly arranged in the rod body rear end cavity 26 to form an upper rear end cavity 261 and a lower rear end cavity 262 which are independent from each other; one end of the lower rear end cavity 262 is communicated with the rod body front end cavity 25 through a through hole 30; the lower part of the rod body front end cavity 25 is provided with a second open pore 17; the rod body front end cavity 25 is communicated with the lower piston body cavity 23 through the second opening 17; an upper piston body through hole 27 is arranged at the lower part of the upper piston body cavity 22; a lower piston body through hole 28 is arranged at the upper part of the lower piston body cavity 23; a rod body front end through hole 29 is arranged at the upper part of the rod body front end cavity 25; the lower piston body cavity 23 is respectively communicated with the rod body front end cavity 25 and the upper piston body cavity 22 through a lower piston body through hole 28, a rod body front end through hole 29 and an upper piston body through hole 27; a third opening 18 is formed in the upper portion of the upper rear end cavity 261; the upper piston body cavity 22 is communicated with the upper rear end cavity 261 through the third open hole 18;

a first sealed double-compartment 13 and a second sealed double-compartment 14 are sequentially and fixedly arranged on the right side of the piston body 2 at a certain interval; the piston rod body 5 passes through the first sealed double-compartment 13 and the second sealed double-compartment 14 and is movably matched with the first sealed double-compartment 13 and the second sealed double-compartment 14; a fourth hole 19 communicated with the low-pressure cooling liquid reflux area 141 is formed in the upper part of the upper rear end cavity 261; a first opening 16 communicated with the high-pressure low-temperature cooling liquid area 131 is formed in the lower part of the lower rear end cavity 262; the maximum left travel of the first opening 16 does not exceed the left wall of the first sealed double compartment 13; the maximum right travel of the fourth aperture 19 does not exceed the right wall of the second sealed double compartment 14.

The front half piston body 201 and the rear half piston body 202 are respectively sleeved with the piston ring 3 in sequence. In the present invention, the front half piston body 201 and the rear half piston body 202 are respectively sleeved with the support ring 4 in sequence. In the present invention, an oil pipeline 20 is arranged between the upper piston body cavity 22 and the lower piston body cavity 23. In the invention, a sealing gasket 7 is arranged at the joint of the piston body 2 and the piston rod body 5. In the present invention, a second cylindrical pin 21 is fixedly provided between the front half piston body 201 and the rear half piston body 202. The right end of the piston rod body 5 is connected with an oil cooling pipe part 10; a connecting pad 9 and a plug 11 are arranged between the oil cooling pipe component 10 and the piston rod body 5; the right side of the oil-cooled pipe part 10 is connected with an O-shaped ring 12; a cooling annular cavity 31 is arranged between the outer wall of the oil cooling pipe part 10 and the hollow inner wall of the piston rod body 5; and a piston rod body right side oil inlet 32 and a piston rod body right side oil outlet 33 are respectively arranged on the piston rod body 5.

According to the invention, the front half piston body 201 is provided with a cavity which is symmetrical up and down, the cavity is communicated rightwards, and extends leftwards to the inside of the piston body. The rear half piston body 202 is also provided with a cavity which is symmetrical up and down, the cavity is opened leftwards and can be connected with the front half piston body for the inflow of cooling liquid.

Front piston body half 201 is butted against rear piston body half 202 to form an upper and lower cavity and a passage for assembling with the piston rod. A piston rod body assembling channel 24 is transversely arranged in the middle area of the piston body 2; the plunger rod body assembly channel 24 matches the assembly dimension of the plunger rod body 5.

Referring to fig. 1, the piston body 2 is fixed to the left side of the piston rod body 5 by a nut 1. And a sealing gasket 7 is arranged at the joint of the piston body 2 and the piston rod body 5. The upper piston body cavity 22 and the lower piston body cavity 23 are communicated through an annular channel formed by an upper piston body through hole 27, a lower piston body through hole 28 and a piston rod body 5 and a piston rod body assembling channel 24; at the same time, the oil delivery pipe 20 is also a passage for communicating the upper piston body cavity 22 with the lower piston body cavity 23. Referring to fig. 5, the second cylindrical pin 21 mainly functions to fix the front piston body 201 and the rear piston body 202.

The present invention provides the rear end of the rod body inside the piston rod body 5 as a channel with two cooling cavities, an upper rear end cavity 261 and a lower rear end cavity 262. The upper rear end cavity 261 is separated from the lower rear end cavity 262 by the piston rod core 8. Upper rear cavity 261 and lower rear cavity 262 extend to the right into second sealed double compartment 14 and to the left through rod front cavity 25 to the piston rod left.

The invention sets up two trompils in the rear end inferior part of the body of rod of the piston rod 5, the first trompil 16 connects the high-pressure cryogenic coolant district 131; the second opening 17 connects to the lower piston body cavity 23. The upper part of the rear end of the piston rod body 5 is also provided with two openings, a fourth opening 19 is connected with the low-pressure cooling liquid return area 141, and a third opening 18 is connected with the upper piston body cavity 22.

The front piston body 201 and the rear piston body 202 are respectively sleeved with three piston rings 3. The front half piston body 201 and the back half piston body 202 are respectively provided with a supporting ring 4 which plays a role of supporting and guiding the piston.

The piston rod body 5 is assembled with the piston body on the left side and passes through the first sealed double compartment 13 and the second sealed double compartment 14 on the right side. The lower side of the first sealed double compartment 13 is provided as a high pressure low temperature coolant region 131 and the upper side of the second sealed double compartment 14 is provided as a low pressure coolant recirculation region 141. The first sealed double compartment 13 and the second sealed double compartment 14 are stationary. The piston reciprocates in a horizontal plane.

The right side of the piston rod body 5 is connected with an oil cooling pipe component 10, a 9 pad and a 11 plug are connected between the oil cooling pipe component 10 and the piston rod body 5, and the right side of the oil cooling pipe component is connected with an O-shaped ring 12. A cooling annular cavity 31 is arranged between the outer wall of the oil cooling pipe part 10 and the hollow inner wall of the piston rod body 5; and a piston rod body right side oil inlet 32 and a piston rod body right side oil outlet 33 are respectively arranged on the piston rod body 5. The cooling liquid enters the cooling annular cavity 31 from the oil inlet 32 on the right side of the piston rod body and then flows out from the oil outlet 33 on the right side of the piston rod body, so that the cooling effect is achieved on the end area on the right side of the piston rod body 5.

In operation of the present invention, coolant in the high pressure low temperature coolant zone 131 in the first sealed double compartment 13 enters the lower back end cavity 262 through the first opening 16 under pressure, then the coolant is divided into two paths through the through hole 30, one path enters the lower piston body cavity 23 through the second opening 17, and the other path enters the rod front end cavity 25. The cooling liquid in the lower piston body cavity 23 is gradually filled in the cavity under the action of gravity, the cooling liquid enters the upper piston body cavity 22 through the oil pipeline 20, and meanwhile, the cooling liquid in the lower piston body cavity 23 can also enter the upper piston body cavity 22 through the upper piston body through hole 27 and an annular channel formed by the lower piston body through hole 28 and the piston rod body 5 and the piston rod body assembly channel 24. When the upper piston body cavity 22 is filled with the cooling liquid, the cooling liquid enters the upper rear end cavity 261 from the third opening 18, and then flows out from the fourth opening 19 and enters the low-pressure cooling liquid reflux area 141 at the upper part of the second sealed double-compartment chamber 14, so that the cooling from the interior of the piston body and the piston rod body is realized, and the whole cooling efficiency of the component is improved.

In the description of the present invention, it is to be understood that the terms indicating orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be taken as limiting the present invention.

In the present invention, unless otherwise expressly stated or limited, the terms "disposed," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integral; can be mechanically or electrically connected; the terms may be directly connected or indirectly connected through an intermediate, and may be communication between two elements or interaction relationship between two elements, unless otherwise specifically limited, and the specific meaning of the terms in the present invention will be understood by those skilled in the art according to specific situations.

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