CN214464769U

CN214464769U - Piston with oil storage tank

Info

Publication number: CN214464769U
Application number: CN202120168445.6U
Authority: CN
Inventors: 李颖高; 李东海; 吕绮峰
Original assignee: Baohua Haines Compressor Shanghai Co ltd
Current assignee: Baohua Haines Compressor Shanghai Co ltd
Priority date: 2021-01-21
Filing date: 2021-01-21
Publication date: 2021-10-22
Anticipated expiration: 2031-01-21

Abstract

The utility model provides a take piston of oil storage tank, including piston, piston ring, set up 2 at least piston ring grooves on the lateral wall of piston, piston ring groove includes at least one oil storage tank, the piston ring with the link can be dismantled to the piston ring groove. The utility model discloses simple structure, convenient to use can be based on the mounted position of the operating mode adjustment piston ring of piston, thereby change the position of oil storage tank, in order to adjust the piston needs lubricated position, satisfies under the different operating modes the lubricated demand of piston can be arranged in mechanical products such as different compressors and engines, has extensive suitability.

Description

Piston with oil storage tank

Technical Field

The utility model relates to a compressor and engine field especially relate to a take piston of oil storage tank.

Background

In order to ensure the lubricity between the piston and the inner wall of the cylinder, lubricating oil is generally injected into the cylinder, and under the extrusion of the piston, the oil injection of the oil injection hole is distributed along the periphery of the oil injection hole instead of being uniformly distributed along the circumferential direction of the piston, so that the oil injection of the cylinder is easily caused to be not uniformly distributed along the circumferential direction of the cylinder, the local oil film is lost, the sealing effect is influenced, the service life of a piston ring and the cylinder is influenced, and even the local dry friction is possibly caused to cause the pulling damage of the cylinder wall and the surface of the piston.

In order to solve the problem of lubrication uniformity, an oil storage groove is usually formed in a piston in the prior art, so that a certain amount of lubricating oil is reserved, and the lubrication time is prolonged. For example, a piston with an oil storage groove disclosed in patent publication No. CN2644786Y includes a piston body, and is characterized in that: an annular oil groove is processed on the skirt part of the piston body.

However, the design in the prior art has the disadvantage that the position of the oil storage tank is not adjustable, so that the position of the piston required for lubrication is also not adjustable, and therefore, the oil storage tank cannot be applied to different working conditions or different mechanical products such as compressors, engines and the like, and is short of wide applicability.

Therefore, it is necessary to provide a piston with an oil reservoir to solve the above problems in the prior art.

SUMMERY OF THE UTILITY MODEL

The utility model provides a take piston of oil storage tank has overcome above-mentioned prior art not enough, can according to the mounted position of the operating mode adjustment piston ring of piston to the lubricated position of adjustment needs satisfies the lubricated demand of piston under the different operating modes and can be used to mechanical products such as different compressors and engines, has extensive suitability.

In order to achieve the above object, a take piston of oil storage tank, including piston, piston ring, set up 2 at least piston ring grooves on the lateral wall of piston, piston ring groove includes at least one oil storage tank, the piston ring with the connection can be dismantled to piston ring groove.

The beneficial effects of the utility model reside in that: piston ring groove includes at least one oil storage tank, the setting up of oil storage tank makes vice lubricating oil circumference of friction arrange more evenly effectively, has strengthened sealed effect, has reduced the friction consumption, has prolonged the vice life-span of friction, simultaneously, through the mounted position of piston ring can be adjusted the oil storage tank is in position in the piston to satisfy the lubricated demand of piston under the different work condition, and be applied to mechanical products such as different compressors and engines, make the piston has extensive suitability.

Further, the piston further comprises a piston top, a piston skirt and a piston rod, wherein the piston top and the piston skirt are arranged on the outer side wall of the piston, and the piston skirt is arranged between the piston top and the piston rod. The beneficial effects are that: the piston top is used for the setting of piston ring groove with the oil storage tank, is convenient for with the heat transfer from the piston top to accommodate on the cylinder wall of piston, the piston skirt portion is used for connecting the piston rod, and when the piston is in make reciprocating motion in the cylinder play the effect of direction and bearing side direction pressure.

Further, the piston still includes oil ring groove and oil return tank, the oil return tank sets up the piston ring groove is kept away from one side at piston top, the oil ring groove sets up the piston ring groove with between the oil return tank. The beneficial effects are that: the oil ring groove and the oil return groove are used for storing redundant lubricating oil.

Furthermore, the piston also comprises an oil ring, and the oil ring is detachably connected with the oil return groove. The beneficial effects are that: the oil ring is used for scraping redundant lubricating oil on the cylinder wall, and meanwhile, a thin oil film is distributed on the inner wall of the cylinder, so that the normal lubrication of the inner wall of the cylinder and the piston ring is ensured.

Further, when the number of the oil storage grooves is n (n is a natural number not less than 1), the number of the piston rings is a natural number more than 5(n-1) and not more than 5 n. The beneficial effects are that: the quantity of oil groove sets up according to the quantity of piston ring, guarantees the degree of lubrication of piston.

Further, the piston ring grooves are identical in shape and size. The beneficial effects are that: the shape and the size of the piston ring groove are the same, so that the piston ring with the same specification can be installed at any position of the piston ring groove, and the position of the oil storage groove can be conveniently and quickly adjusted.

Furthermore, the oil return groove is provided with an oil return hole, and the oil return hole is arranged between the lower surface of the oil ring and the lower edge of the oil return groove. The beneficial effects are that: and the oil return hole is arranged to enable redundant lubricating oil to flow back to the oil tank through the oil return hole, so that the lubricating oil can be recycled in the piston.

Further, the oil ring groove is provided with an oil return hole, and the oil return hole is arranged between the upper edge of the oil ring groove and the upper edge of the oil return groove. The beneficial effects are that: and the oil return hole is arranged to enable redundant lubricating oil to flow back to the oil tank through the oil return hole, so that the lubricating oil can be recycled in the piston.

Further, the ratio of the diameter of the piston ring groove to the width and diameter of the piston is between 1/36 and 1/22. The beneficial effects are that: the width and diameter ratio of the piston ring groove is between 1/36 and 1/22, so that the piston ring groove has a suitable oil storage volume.

Further, the outer diameter of the piston ring is larger than the diameter of the piston, and the outer diameter of the piston ring is smaller than the inner diameter of a cylinder accommodating the piston. The beneficial effects are that: the inner diameter of the piston ring is larger than the diameter of the piston, so that the piston ring can ensure the sealing performance of the cylinder, can scrape lubricating oil attached to the wall of the cylinder and has the effect of lubricating the piston.

Furthermore, the piston is provided with a cavity structure along the skirt part of the piston, and the cavity structure is also provided with a reinforcing rib which is arranged in the cavity structure of the piston in a penetrating way. The beneficial effects are that: the cavity structure can reduce the friction of the friction pair, save materials and reduce cost, and the reinforcing rib is used for improving the bearing load of the piston and prolonging the service life of the piston.

Drawings

Fig. 1 is a schematic view of an oil reservoir in a first position of a piston according to an embodiment of the present invention;

fig. 2 is a schematic view of an oil reservoir in a second position of the piston according to an embodiment of the invention;

fig. 3 is a schematic view of an oil reservoir in a third position of the piston according to an embodiment of the present invention;

fig. 4 is a schematic view of an oil reservoir in a fourth position of the piston according to an embodiment of the present invention;

FIG. 5 is a front view of an embodiment of the present invention with the piston ring and oil ring removed;

FIG. 6 is a cross-sectional view of a piston passing through the axis perpendicular to the direction of the ring grooves according to an embodiment of the present invention;

fig. 7 is a cross-sectional view of a piston oil gallery in parallel with the ring groove in an embodiment of the present invention. The codes in the figures are respectively:

1-a piston; 11-piston ring groove; 111-oil reservoir; 12-an oil return tank; 121-oil return hole; 13-oil ring groove; 131-oil return holes; 14-piston top; 15-piston skirt; 16-a piston rod; 17-a cavity structure; 18-reinforcing ribs; 19-transition fillets;

2-a piston ring;

3-oil ring.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, the drawings of the present invention are combined to clearly and completely describe the technical solutions in the embodiments of the present invention, and obviously, the described embodiments are some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention. Unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention belongs. As used herein, the word "comprising" and similar words are intended to mean that the element or item listed before the word covers the element or item listed after the word and its equivalents, but does not exclude other elements or items.

To the problem that prior art exists, the piston of taking the oil storage tank includes piston, piston ring, set up 2 at least piston ring grooves on the lateral wall of piston, piston ring groove includes at least one oil storage tank, the piston ring with the link can be dismantled to piston ring groove.

Taking the piston 1 shown in fig. 1 and fig. 5 as an example, the piston with the oil storage groove comprises a piston 1 and a piston ring 2, at least 2 piston ring grooves 11 are arranged on the side wall of the piston 1, the piston ring grooves 11 comprise at least one oil storage groove 111, and the piston ring 2 is detachably connected with the piston ring grooves 11. The setting up of oil storage tank 111 makes vice lubricating oil circumference of friction arrange more evenly effectively, has strengthened sealed effect, has reduced the friction consumption, has prolonged the vice life-span of friction, simultaneously, through piston ring 2's mounted position can adjust oil storage tank 111 is in position in the piston 1 to satisfy under the different work condition piston 1's lubricated demand, and be applied to mechanical products such as different compressors and engines, make the piston of taking the oil storage tank has extensive suitability.

In some specific embodiments, as shown in fig. 1 and 5, the piston 1 further includes a piston crown 14, a piston skirt 15 and a piston rod 16, the piston crown 14 and the piston skirt 15 are disposed on an outer side wall of the piston 1, the piston skirt 15 is disposed between the piston crown 14 and the piston rod 16, the piston crown 14 is used for disposing the piston ring groove 11 and the oil storage groove 111, so as to facilitate heat transfer from the piston crown 14 to a cylinder wall accommodating the piston 1, and the piston skirt 15 is used for connecting the piston rod 16 and serving to guide and bear lateral pressure when the piston 1 reciprocates in the cylinder.

In some specific embodiments, as shown in fig. 5, the piston further includes an oil ring groove 13 and an oil return groove 12, the oil return groove 12 is disposed on one side of the piston ring groove 11 away from the piston top 14, the oil ring groove 13 is disposed between the piston ring groove 11 and the oil return groove 12, and the oil ring groove 13 and the oil return groove 12 are used for storing redundant lubricating oil.

In some specific embodiments, as shown in fig. 1, the piston 1 further includes an oil ring 3, the oil ring 3 is detachably connected to the oil return groove 12, and the oil ring 3 is configured to scrape off excess lubricating oil on the cylinder wall and at the same time, distribute a thin oil film on the cylinder wall to ensure normal lubrication of the cylinder wall and the piston ring 2.

Preferably, the piston 1 has 1

oil reservoir

111 and 3 piston rings 2, and the number of the oil reservoirs 111 is set according to the number of the piston rings 2, so as to ensure the lubrication of the piston 1.

In some embodiments, as shown in fig. 1, the piston 1 has 1

oil reservoir

111 and 3 piston rings 2, and the oil reservoir 111 is located at the first position to improve the lubrication between the cylinder wall and the piston 1.

In other embodiments, as shown in fig. 2 and 3, the piston 1 has 1

oil reservoir

111 and 3 piston rings 2, and when the oil reservoir 111 is located at the second position or the third position, the sealing pressure required by the piston 1 is higher than that at the position shown in fig. 1, and the oil reservoir 111 lubricates the piston rings 2 more directly, but reduces the oil storage effect.

Preferably, as shown in fig. 4, the piston 1 has 1

oil storage tank

111 and 3 piston rings 2, and when the oil storage tank 111 is located at the fourth position, compared to the positions shown in fig. 1 to 3, the sealing pressure required by the piston 1 is the smallest, the air tightness of the piston 1 is the best, and the leakage pressure and the sealing pressure of the cylinder in which the piston 1 operates are the lowest, so as to facilitate oil storage in the oil storage tank 111.

Preferably, as shown in fig. 1 to 5, the piston ring grooves 11 have the same shape and size, so that the piston rings 2 of the same specification can be installed at any position of the piston ring grooves 11 to conveniently and rapidly adjust the position of the oil reservoir 111.

In some specific embodiments, as shown in fig. 5, the oil return groove 12 is provided with an oil return hole 121, the oil return hole 121 is disposed between the lower surface of the oil ring 3 and the lower edge of the oil return groove 12, and the oil return hole 121 is disposed to return the excess lubricating oil to the oil tank through the oil return hole 121, so that the lubricating oil is recycled in the piston 1.

Preferably, the oil return hole 121 is disposed at a position where the lower surface of the oil ring 3 contacts the oil return groove 12, so that the lubricating oil in the oil return groove 12 can conveniently and quickly flow back to the oil tank through the oil return hole 121.

In some specific embodiments, as shown in fig. 5, the oil ring groove 13 is provided with oil return holes 131, the oil return holes 131 are disposed between an upper edge of the oil ring groove 13 and an upper edge of the oil return groove 12, and the oil return holes 131 are disposed to return the excess lubricating oil to the oil tank through the oil return holes 131, so that the lubricating oil is recycled in the piston 1.

Preferably, the oil return hole 131 is arranged at a position where the lower surface of the oil ring groove 13 contacts with the upper surface of the oil return groove 12, so that the lubricating oil in the oil ring groove 13 can more conveniently flow back to the oil tank through the oil return hole 131.

Preferably, as shown in fig. 1 and 5, the ratio of the diameter of the piston ring groove 11 to the width and diameter of the piston 1 is 1/36 to 1/22, so that the piston ring groove 11 has a suitable oil storage capacity.

In some embodiments, as shown in fig. 1, the outer diameter of the piston ring 2 is larger than the diameter of the piston 1, and the outer diameter of the piston ring 2 is smaller than the inner diameter of the cylinder accommodating the piston 1, so that the piston ring 2 can ensure the sealing performance of the cylinder and scrape off the lubricating oil adhered to the cylinder wall to play a role in lubricating the piston 1.

Preferably, as shown in fig. 1 and 6, the piston 1 is provided with a cavity structure 17 along the skirt portion of the piston, the cavity structure 17 is further provided with a reinforcing rib 18, the reinforcing rib 18 is arranged in the cavity structure 17 of the piston 1 in a penetrating manner, the cavity structure 17 can reduce friction of the friction pair, save materials and reduce cost, and the reinforcing rib 18 is used for improving bearing load of the piston 1 and prolonging service life of the piston 1.

Preferably, as shown in fig. 4, the piston crown 14 and the piston cluster 15 are further provided with a transition fillet 19, and the transition fillet 19 is used for reducing the heat flow resistance of the piston 1 during operation, so that heat can be transferred from the piston crown 14 to the cylinder wall.

Although the embodiments of the present invention have been described in detail hereinabove, it is apparent to those skilled in the art that various modifications and variations can be made to these embodiments. However, it is to be understood that such modifications and variations are within the scope and spirit of the present invention as set forth in the appended claims. Moreover, the invention as described herein is capable of other embodiments and of being practiced or of being carried out in various ways.

Claims

1. The utility model provides a take piston of oil storage tank, its characterized in that includes piston, piston ring, set up 2 at least piston ring grooves on the lateral wall of piston, piston ring groove includes at least one oil storage tank, the piston ring with the link can be dismantled to piston ring groove.

2. The piston with a reservoir of claim 1 further comprising a piston crown, a piston skirt, and a piston rod, said piston crown and said piston skirt being disposed on an exterior sidewall of said piston, said piston skirt being disposed between said piston crown and said piston rod.

3. The piston with an oil reservoir as set forth in claim 2, further comprising an oil ring groove and an oil return groove, said oil return groove being provided on a side of said piston ring groove remote from said piston crown portion, said oil ring groove being provided between said piston ring groove and said oil return groove.

4. The piston with an oil reservoir of claim 3 further comprising an oil ring, said oil ring being removably attached to said oil ring groove.

5. The piston with an oil reservoir as set forth in claim 1, wherein when the number of the oil reservoirs is n (n is a natural number not less than 1), the number of the piston rings is a natural number greater than 5n-5 and not greater than 5 n.

6. The piston with an oil reservoir of claim 1 wherein said ring grooves are identical in shape and size.

7. The piston with an oil reservoir of claim 3 wherein said oil return gallery is provided with an oil return hole, said oil return hole being disposed between a lower edge of said oil ring groove and a lower edge of said oil return gallery.

8. The piston with an oil reservoir of claim 3 wherein said oil ring groove is provided with oil return holes, said oil return holes being disposed between an upper edge of said oil ring groove and an upper edge of said oil return groove.

9. The piston with an oil reservoir of claim 1 wherein said piston ring groove has a width to diameter ratio between 1/36 and 1/22.

10. The piston with an oil reservoir of claim 1, further comprising a cylinder receiving said piston, said piston ring having an inner diameter greater than a diameter of said piston and an outer diameter less than an inner diameter of said cylinder.

11. The piston with the oil storage tank as claimed in claim 2, wherein a cavity structure is formed along the skirt portion of the piston, and a reinforcing rib is further arranged in the cavity structure and penetrates through the cavity structure.