CN218031376U - Narrow seal groove structure of low roughness - Google Patents

Abstract

The utility model discloses a narrow seal groove structure of low roughness, set up on fluid passage's tip outer wall, including first step hole, second step hole and bush, first step hole forms on the tip outer wall, and the aperture of first step hole is greater than fluid passage's aperture, thereby form first step face at the junction of first step hole and fluid passage, second step hole forms on first step hole keeps away from the one end of first step face, the aperture of second step hole is greater than fluid passage's aperture, thereby form second step face at the junction of second step hole and first step hole, the one end of bush is nested in first step hole, and the other end that the bush kept away from first step face protrudes in second step face; the utility model discloses a narrow seal groove structure of low roughness forms combination formula seal groove through processing and embedding bush, improves the roughness of machining field seal groove, satisfies sealed operation requirement.

Description

Narrow seal groove structure of low roughness

Technical Field

The utility model relates to a seal groove roughness improves technical field, in particular to narrow seal groove structure of low roughness.

Background

Sealing grooves are widely available on marine machinery, wherein roughness is an important technical index for machining. After the sealing ring is arranged in the sealing groove, if the roughness exceeds the requirement, the sealing ring is easily damaged, and leakage is caused. Generally, the sealing groove is directly machined on the structure body, as shown in the following figures. When the narrow sealing groove is directly machined, the roughness after machining is difficult to guarantee due to the influence of the geometric parameters and the cutting edge angle of the cutter, and the sealing effect is directly influenced. Even if grinding is performed after machining, the effect after grinding is not satisfactory because the groove width is narrow.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome foretell not enough, the utility model provides a narrow seal groove structure of low roughness forms combination formula seal groove through processing and embedding bush, improves the roughness of machining field seal groove, satisfies sealed operation requirement.

The utility model provides a pair of narrow seal groove structure of low roughness, set up on fluid passage's tip outer wall, including first step hole, second step hole and bush, first step hole forms on the tip outer wall, and the aperture of first step hole is greater than fluid passage's aperture, thereby form first step face in first step hole and fluid passage's junction, second step hole forms on first step hole keeps away from the one end of first step face, the aperture of second step hole is greater than fluid passage's aperture, thereby form second step face in second step hole and first step hole's junction, the one end of bush is nested in first step hole, and the bush keeps away from the other end protrusion of first step face in second step face, thereby at the pore wall in second step hole, form the seal groove between the outer wall of bush and the second step face.

Further, the bushing is provided with an axial through hole therein, the axial through hole is coaxially arranged with the fluid channel, and the radial dimension of the axial through hole is equal to that of the fluid channel.

Further, the outer diameter of the bushing is in interference fit with the bore diameter of the first stepped bore.

Further, the distance between the other end of the bushing and the second stepped surface is equal to the depth of the second stepped hole.

Further, one end of the bushing facing the first step surface abuts against the first step surface.

Further, the first stepped bore is disposed coaxially with the fluid passage.

Further, the second stepped hole is coaxially arranged with the first stepped hole.

The beneficial effects of the utility model are that: the utility model discloses a narrow seal groove structure of low roughness forms combination formula seal groove through processing and embedding bush, when guaranteeing that the size after narrow seal groove processing satisfies the drawing requirement, can satisfy the roughness after the processing again to satisfy mechanical equipment's sealed requirement, improve machining field seal groove roughness, processing is simple swift, and safe and reliable has played good improvement effect to the sealed of improvement machinery field.

Drawings

Fig. 1 is a schematic view of a low roughness narrow seal groove structure in an embodiment of the present invention;

fig. 2 is a schematic structural view of a bushing according to an embodiment of the present invention;

fig. 3 is a schematic structural view of a fluid passage in an embodiment of the present invention;

fig. 4 is a schematic structural view of forming a first stepped hole in an embodiment of the present invention;

fig. 5 is a schematic structural diagram of forming the second stepped hole in the embodiment of the present invention.

In the figure, 1 is a distributor casing, 2 is an oil inlet joint, 3 is an oil outlet joint, 4 is a refrigerant channel, 5 is a valve body, 6 is an outer casing, 7 is a right side plate, 8 is a front side plate, 9 is a rear side plate, 10 is an upper side plate, 11 is a lower side plate, 12 is a second oil outlet through hole, 13 is a first groove, 14 is a second groove, 15 is a filter screen, and 16 is a refrigerant outlet.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.

Fig. 1 is a schematic structural view of a narrow seal groove structure with low roughness according to an embodiment of the present invention. Fig. 2 is a schematic structural view of a bushing in an embodiment of the present invention; fig. 3 is a schematic structural view of a fluid passage in an embodiment of the present invention; fig. 4 is a schematic structural view of forming a first stepped hole in an embodiment of the present invention; fig. 5 is a schematic structural diagram of forming the second stepped hole in the embodiment of the present invention.

As shown in fig. 1 and 3, a narrow seal groove structure with low roughness in the present embodiment is provided on an end outer wall 2 of a fluid passage 1, and includes a first stepped hole 3, a second stepped hole 4, and a liner 5.

As shown in fig. 1 and 4, a first stepped hole 3 is formed in the end outer wall 2 and is disposed coaxially with the fluid passage 1, and the bore diameter of the first stepped hole 3 is larger than that of the fluid passage 1, so that a first stepped surface 7 is formed at the junction of the first stepped hole 3 and the fluid passage 1.

As shown in fig. 1 and 5, the second stepped hole 4 is formed at an end of the first stepped hole 3 remote from the first stepped surface 7 and is disposed coaxially with the first stepped hole 3, and the bore diameter of the second stepped hole 4 is larger than that of the fluid passage 1, so that a second stepped surface 8 is formed at the junction of the second stepped hole 4 and the first stepped hole 3.

As shown in fig. 1 and 2, the outer diameter of the bushing 5 is in interference fit with the bore diameter of the first stepped hole 3, one end of the bushing is nested in the first stepped hole 3 and abuts against the first stepped surface 7, and the other end of the bushing protrudes out of the second stepped surface 8, so that a seal groove is formed between the hole wall of the second stepped hole 4, the outer wall of the bushing 5, and the second stepped surface 8.

Further, the distance between the other end of the bush 5 and the second stepped surface 8 is equal to the depth of the second stepped hole 4.

The bush 5 has an axial through hole 6 therein, the axial through hole 6 is arranged coaxially with the fluid passage 1, and the radial dimension of the axial through hole 6 is equal to the radial dimension of the fluid passage 1.

The formation process of the narrow sealing groove structure with low roughness of the embodiment is as follows:

after the fluid passage 1 is machined, as shown in fig. 3, firstly, according to the inner diameter of the seal groove to be machined on the drawing, referring to the center reference line of the fluid passage 1, a first stepped hole 3 with the height H1 is machined on the outer wall 2 of the end part of the fluid passage 1 at the position to be sealed by using a numerical control machine, as shown in fig. 4, the first stepped hole 3 is mainly used for installing a subsequent bushing 5.

Then, according to the outer diameter and the height of the to-be-machined sealing groove on the drawing, referring to the central reference line of the fluid passage 1, machining a second stepped hole 4 with a height H2, as shown in FIG. 5, measuring the roughness of the hole wall of the second stepped hole 4 after machining, and entering the next step if the requirement of the drawing is met; otherwise, the roughness in the second stepped hole 4 needs to be ground until the requirement of a design drawing is met. At this time, since the diameter of the second stepped hole 4 is large, not a narrow groove structure, the grinding is convenient.

Next, based on the hole diameter of the second stepped hole 4, a bush 5 is machined, and as shown in fig. 2, the roughness of the outer circumference of the bush 5 is measured after machining. The inner bore of the bush 5 is sized according to the diameter of the fluid passage 1, and the outer diameter of the bush 5 is determined according to the actual diameter of the second stepped bore 4. On the basis of this dimension, a certain interference of the bush 5 with respect to the second stepped hole 4 is ensured. According to the requirement of the interference and the size of the inner hole, the bushing 5 meeting the requirement is processed. After the machining is finished, measuring the roughness of the outer circle of the bushing 5, and entering the next working procedure if the requirement is met; otherwise, the surface roughness of the lining 5 needs to be ground until the requirements of the design drawing are met.

Finally, the bushing 5 is inserted into the groove in a freezing manner to form a required sealing groove, as shown in fig. 1, thereby ensuring roughness in the sealing groove. Bushing 5 and first step hole 3 are interference fit, need freeze the installation during the installation, select for use liquid nitrogen or dry ice to freeze usually. Before the installation, place a period with bush 5 in liquid nitrogen or dry ice, wait to cool off to take out the back to the certain degree, imbed bush 5 in first step hole 3 immediately, use the bar copper to strike gently, wait that the installation finishes after the terminal portion outer wall 2 parallel and level of plane and fluid passage 1 on the bush 5.

Because the excircle of second step hole 4 and 5 excircle of bush all are processed the completion in advance, and the roughness has satisfied the drawing requirement moreover, consequently, the seal groove that forms after 5 installations of bush, roughness can be guaranteed.

To sum up, it is the utility model discloses a concrete application example, right the utility model discloses the protection scope does not constitute the restriction, adopts the technical scheme of equivalent replacement all to fall within the utility model discloses within the protection scope.

Claims (7)

1. The utility model provides a narrow seal groove structure of low roughness, sets up on fluid passage's tip outer wall, its characterized in that includes first step hole, second step hole and bush, first step hole is formed on the tip outer wall, just the aperture of first step hole is greater than fluid passage's aperture, thereby first step hole forms first step face with fluid passage's junction, second step hole forms first step hole is kept away from on the one end of first step face, the aperture of second step hole is greater than fluid passage's aperture, thereby second step hole with the junction of first step hole forms second step face, the one end of bush is downthehole in the first step, just the other end that the bush kept away from first step face bulge in the second step face, thereby form the seal groove between the pore wall in second step hole, the outer wall of bush and the second step face.

2. The narrow low roughness seal groove structure of claim 1, wherein said bushing has an axial through hole therein, said axial through hole being coaxially disposed with said fluid passageway and having a radial dimension equal to a radial dimension of said fluid passageway.

3. The narrow low roughness seal groove structure of claim 2, wherein said bushing has an outer diameter that is an interference fit with said first stepped bore diameter.

4. The narrow low roughness seal groove structure of claim 3, wherein said other end of said bushing is spaced from said second step surface by a distance equal to the depth of said second step bore.

5. The narrow low roughness seal groove structure of claim 4, wherein an end of said bushing facing said first step surface abuts said first step surface.

6. The narrow low roughness seal groove structure of claim 1, wherein said first stepped bore is disposed coaxially with said fluid passageway.

7. The narrow low roughness seal groove structure of claim 6, wherein the second stepped bore is disposed coaxially with the first stepped bore.

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