A dispenser with automatic seal compensation mechanism

Abstract

This invention discloses a dispenser with an automatic sealing compensation mechanism, comprising a spindle and a housing rotatable relative to each other about a first axis. The automatic sealing compensation mechanism includes a first annular groove formed by a radial indentation in the inner periphery of the housing, a first sealing ring sleeved on the spindle, a sliding seat slidably disposed in the first annular groove for accommodating the first sealing ring, and an elastic element disposed in the first annular groove. The spindle includes a spindle body, a first convex ring and a second convex ring radially convexly disposed on the spindle body, the first convex ring and the second convex ring being arranged axially along the spindle body, the diameter of the first convex ring being smaller than the diameter of the second convex ring, and the first convex ring and the second convex ring being located inside the first annular groove, respectively. The elastic element provides an elastic restoring force to drive the sliding seat to slide from the first convex ring toward the second convex ring. This invention's dispenser can perform automatic sealing compensation in both the radial and axial directions, effectively extending the service life of the dispenser.

Description

Technical Field

[0001] This invention relates to the field of filling technology, and in particular to a dispenser with an automatic sealing compensation mechanism. Background Technology

[0002] When the dispenser of a filling machine is working, the rotation centers of the dynamic and static structures often become misaligned due to unavoidable factors such as processing and installation, or the rotation center axis of the dispenser is not perpendicular to the mounting surface due to the non-levelness of the mounting surface. This results in a conical oscillation phenomenon, which causes the sealing ring between the dispenser and the spindle to wear faster and cause leakage, shortening the service life of the dispenser and affecting production efficiency.

[0003] In existing technologies, sealing rings with only radial self-elastic compensation function are generally used to seal the dynamic and static parts of the distributor. This structure can effectively achieve the sealing effect. However, since conventional sealing rings are circumferential rotating structures, after the inner circumference of the sealing ring wears to a certain extent, the radial self-elastic function can no longer cause the sealing ring to shrink and seal. The compensation amount is limited, resulting in a short sealing life of the distributor. Frequent disassembly and assembly of the distributor affects production efficiency and leads to high maintenance costs. Summary of the Invention

[0004] The purpose of this invention is to provide a distributor with an automatic sealing compensation mechanism, which can automatically seal and compensate in both the radial and axial directions, effectively extending the service life of the distributor and making its production efficiency relatively high.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0006] A dispenser with an automatic sealing compensation mechanism includes a spindle and a housing that are rotatable relative to each other about a first axis. The housing is sleeved on the spindle, and the axes of the housing and the spindle are both the first axis. The automatic sealing compensation mechanism includes a first annular groove formed by a radial indentation of the inner periphery of the housing, a first sealing ring sleeved on the spindle and located in the first annular groove, a sliding seat slidably disposed in the first annular groove along an axial direction parallel to the housing and used to accommodate the first sealing ring, and an elastic member disposed in the first annular groove with one end abutting against the first inner end face of the first annular groove, the other end of the elastic member abutting against the sliding seat.

[0007] The mandrel includes a mandrel body, a first protruding ring and a second protruding ring radially convexly disposed on the mandrel body, the first protruding ring and the second protruding ring being arranged along the axial direction of the mandrel body, the diameter of the first protruding ring being smaller than the diameter of the second protruding ring, the first protruding ring and the second protruding ring being located inside the first annular groove, and the elastic element being used to provide an elastic restoring force for driving the sliding seat to slide from the first protruding ring toward the second protruding ring.

[0008] Preferably, the first sealing ring has a first sealing position and a second sealing position:

[0009] Before the first sealing ring wears out, the first sealing ring abuts against the outside of the first convex ring and the two are in an interference fit. The first sealing ring is located at the first sealing position. The frictional force between the first sealing ring and the first convex ring is greater than or equal to the elastic restoring force of the elastic element.

[0010] After the first sealing ring wears out, the frictional force between the first sealing ring and the first convex ring is less than the elastic restoring force of the elastic element. The elastic element is used to drive the first sealing ring to move from the first sealing position to the second sealing position. The first sealing ring abuts against the outside of the second convex ring and the two are interference-fitted.

[0011] More preferably, when the first sealing ring is in the second sealing position, the sliding seat abuts against the second inner end face of the annular groove.

[0012] Preferably, the first convex ring and the second convex ring are arranged at intervals, and the mandrel includes a transition convex ring disposed between the first convex ring and the second convex ring, the diameter of the transition convex ring gradually increasing in the direction close to the second convex ring.

[0013] More preferably, the transition ring is frustum-shaped, the minimum diameter of the transition ring is equal to the diameter of the first ring, and the maximum diameter of the transition ring is equal to the diameter of the second ring.

[0014] Preferably, the sliding seat includes an annular sliding body and a second annular groove formed by a radial recess in the inner periphery of the sliding body for accommodating the first sealing ring.

[0015] More preferably, the sliding seat further includes a guide post protruding from one end of the sliding body and parallel to the axial direction of the outer shell, and the elastic element is sleeved on the guide post.

[0016] Preferably, the sliding seat is annular, and the automatic sealing compensation mechanism further includes a second sealing ring that abuts against the outer periphery of the sliding seat and the bottom of the first annular groove.

[0017] Preferably, the outer casing has a medium inlet, and there are two sets of automatic sealing compensation mechanisms, which are respectively located on both sides of the medium inlet along the axial direction of the outer casing.

[0018] Preferably, the outer casing has a medium inlet, and the first convex ring is located on the side of the second convex ring away from the medium inlet.

[0019] Due to the application of the above technical solution, the present invention has the following advantages compared with the prior art: The distributor of the present invention with an automatic sealing compensation mechanism can automatically seal and compensate radially through its own elasticity. When the first sealing ring is worn to a certain extent, under the drive of the elastic element, the first sealing ring, together with the large-diameter second convex ring, can automatically seal and compensate axially. This structure can effectively extend the service life of the distributor and improve its production efficiency. Attached Figure Description

[0020] Appendix Figure 1 This is a cross-sectional structural schematic diagram of the distributor according to a specific embodiment of the present invention;

[0021] Appendix Figure 2 For the appendix Figure 1 Enlarged view of point A in the middle Figure 1 (The first sealing ring is located in the first sealing position);

[0022] Appendix Figure 3 For the appendix Figure 1 Enlarged view of point A in the middle Figure 2 (The first sealing ring is located at the second sealing position.)

[0023] Wherein: 1. First axis; 2. Mandrel; 21. Mandrel body; 22. First convex ring; 23. Second convex ring; 24. Transition convex ring; 25. Medium outlet; 3. Outer shell; 31. Medium inlet; 4. First annular groove; 41. First inner end face; 42. Second inner end face; 43. Groove bottom; 5. First sealing ring; 6. Sliding seat; 61. Sliding body; 62. Second annular groove; 63. Guide post; 64. Third annular groove; 7. Elastic element; 8. Second sealing ring; 9. Upper bearing; 10. Lower bearing. Detailed Implementation

[0024] The technical solution of the present invention will be further described below with reference to specific embodiments and accompanying drawings.

[0025] In the following description, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments can be modified in various ways without departing from the spirit or scope of the embodiments of the invention. Therefore, the drawings and description are considered to be exemplary in nature and not restrictive.

[0026] In the description of the embodiments of the present invention, it should be understood that the terms "length", "inner", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the embodiments of the present invention.

[0027] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of embodiments of the present invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0028] In this embodiment of the invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this embodiment of the invention according to the specific circumstances.

[0029] In embodiments of the present invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0030] The following disclosure provides many different implementations or examples for carrying out different structures of the embodiments of the present invention. To simplify the disclosure of the embodiments of the present invention, specific examples of components and arrangements are described below. Of course, these are merely examples and are not intended to limit the embodiments of the present invention. Furthermore, reference numerals and / or reference letters may be repeated in different examples of the embodiments of the present invention; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various implementations and / or arrangements discussed.

[0031] See Figure 1As shown, this embodiment provides a dispenser with an automatic sealing compensation mechanism, including a spindle and a housing that can rotate relative to each other about a first axis. The housing is sleeved on the spindle, and the axis of both the housing and the spindle is the first axis, which is parallel to the first axis. Figure 1 The distributor operates vertically. The outer casing is a stationary component, while the spindle is a rotating component, with an upper bearing and a lower bearing between them. The outer casing has a media inlet on its side, and the spindle has a media outlet at its top; the media inlet communicates with the side of the spindle. During operation, the outer casing and spindle are kept vertically coaxial and rotate relative to each other by the constraints of the upper and lower bearings. When the outer casing is stationary and the spindle rotates, external fluid flows in through the media inlet of the outer casing and flows out through the media outlet of the spindle.

[0032] To ensure that the fluid can flow smoothly from the stationary channel to the rotating channel without leakage when the outer shell and the mandrel rotate relative to each other, in this embodiment, automatic sealing compensation mechanisms are provided on the upper and lower sides of the medium inlet to ensure dynamic and static sealing between the outer shell and the mandrel.

[0033] See Figure 2-3 As shown, the automatic sealing compensation mechanism includes a first annular groove formed by a radial indentation of the inner periphery of the housing, a first sealing ring sleeved on the spindle and located in the first annular groove, a sliding seat that can be slidably disposed in the first annular groove along the axial direction parallel to the housing (i.e., the vertical direction in the figure) and is used to accommodate the first sealing ring, and an elastic member disposed in the first annular groove with one end abutting against the first inner end face of the first annular groove, and the other end of the elastic member abutting against the sliding seat.

[0034] In this embodiment, the elastic element is a spring. The upper end of the spring abuts against the first inner end face above the first annular groove, and the lower end of the spring abuts against the upper end face of the sliding seat. Obviously, the length of the sliding seat in the vertical direction is shorter than the groove width of the first annular groove in the vertical direction, so that the sliding seat can slide in the first annular groove in the vertical direction.

[0035] In this embodiment, the sliding seat includes an annular sliding body and a second annular groove formed by a radial indentation of the inner periphery of the sliding body for accommodating the first sealing ring. A portion of the first sealing ring is located in the second annular groove, and the other portion extends out of the second annular groove and abuts against the mandrel.

[0036] The aforementioned sliding seat also includes a guide post protruding upward from the upper end of the sliding body and parallel to the axial direction of the outer shell, and the elastic element is a spring sleeved on the guide post. Multiple guide posts and multiple springs can be arranged along the circumference of the sliding seat according to actual needs.

[0037] The aforementioned mandrel includes a mandrel body, a first protruding ring and a second protruding ring radially convexly disposed on the mandrel body, and the first and second protruding rings are arranged sequentially along the axial direction of the mandrel body (i.e., the vertical direction in the figure). The diameter of the first protruding ring is smaller than the diameter of the second protruding ring, and the first and second protruding rings are respectively located inside the first annular groove. An elastic element provides an elastic restoring force to drive the sliding seat to slide from top to bottom (i.e., from the first protruding ring towards the second protruding ring).

[0038] In this embodiment, the first sealing ring has a first sealing position and a second sealing position:

[0039] Before the first sealing ring wears out, the first sealing ring is pressed against the outside of the first convex ring and the two are in an interference fit. At this time, the first sealing ring is in the first sealing position. The friction between the first sealing ring and the first convex ring is greater than or equal to the elastic restoring force of the elastic element. The elastic element cannot drive the first sealing ring to move in the vertical direction.

[0040] After the first sealing ring wears down, its inner diameter increases, and the interference fit between it and the first convex ring decreases. The friction between the first sealing ring and the first convex ring is less than the elastic restoring force of the elastic element. The elastic element is used to drive the first sealing ring to move downward from the first sealing position to the second sealing position. At this time, the second convex ring forms a new interference area, and the first sealing ring abuts against the outside of the second convex ring and the two are in an interference fit.

[0041] See Figure 3 It can be seen that when the first sealing ring is in the second sealing position, the sliding seat abuts against the second inner end face below the annular groove.

[0042] See Figure 2-3 As shown, in this embodiment, the first and second convex rings are arranged axially at intervals. The mandrel also includes a transition convex ring disposed between the first and second convex rings, the diameter of which gradually increases towards the second convex ring. This arrangement ensures that the first sealing ring maintains its dynamic and static sealing effect through the transition convex ring even as wear causes the inner ring diameter to gradually increase and move vertically.

[0043] The transition ring is frustum-shaped, with its minimum diameter equal to the diameter of the first ring and its maximum diameter equal to the diameter of the second ring.

[0044] In this embodiment, the sliding seat is annular, and the automatic sealing compensation mechanism further includes a second sealing ring that abuts against the outer periphery of the sliding seat and the bottom of the first annular groove. The outer periphery of the sliding body is radially recessed to form a third annular groove for accommodating the second sealing ring.

[0045] In this structure, when the elastic element drives the sliding seat to slide in the vertical direction, it needs to overcome not only the friction between the first sealing ring and the spindle, but also the friction between the second sealing ring and the outer shell.

[0046] In this embodiment, the first convex ring is located on the side of the second convex ring furthest from the medium inlet. See also Figure 1 As shown, in the upper automatic sealing compensation mechanism, the first convex ring is located above the second convex ring, and in the lower automatic sealing compensation mechanism, the first convex ring is located below the second convex ring. With this arrangement, the automatic sealing compensation mechanism can gradually approach the medium inlet during axial automatic sealing compensation, further ensuring dynamic and static sealing between the housing and the spindle.

[0047] The working process of this embodiment is described in detail below:

[0048] In the initial state, the first sealing ring is a brand new, unworn sealing ring. The first sealing ring is interference-fitted with the first convex ring on the spindle. At this time, the elastic element is in a compressed state. The elastic restoring force of the elastic element is insufficient to overcome the sum of the friction between the first sealing ring and the spindle and the friction between the second sealing ring and the outer shell. At this time, the first sealing ring and the first convex ring play the role of dynamic and static sealing.

[0049] As the inner ring of the first sealing ring wears down, its inner ring diameter gradually increases, and the interference fit between it and the first convex ring decreases. At this time, the elastic element can drive the sliding seat to move in the vertical direction, so that the first sealing ring is fitted on the transition convex ring. The interference fit between the first sealing ring and the transition convex ring plays the role of dynamic and static sealing.

[0050] As the inner ring of the first sealing ring wears down, its inner ring diameter increases. The elastic element drives the sliding seat to continue moving axially until it presses against the second inner end face of the first annular groove, so that the first sealing ring is fitted onto the second convex ring. At this time, the first sealing ring and the second convex ring are interference-fitted, which plays the role of dynamic and static sealing.

[0051] The above embodiments are only for illustrating the technical concept and features of the present invention. Their purpose is to enable those skilled in the art to understand the content of the present invention and implement it. They should not be used to limit the scope of protection of the present invention. All equivalent changes or modifications made in accordance with the spirit and essence of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A dispenser with an automatic sealing compensation mechanism, comprising a spindle and a housing rotatable relative to each other about a first axis, the housing being sleeved on the spindle, the axes of the housing and the spindle being the first axis, characterized in that: The automatic sealing compensation mechanism includes a first annular groove formed by a radial indentation of the inner periphery of the housing, a first sealing ring sleeved on the spindle and located in the first annular groove, a sliding seat slidably disposed in the first annular groove along an axial direction parallel to the housing and used to accommodate the first sealing ring, and an elastic member disposed in the first annular groove with one end abutting against the first inner end face of the first annular groove, the other end of the elastic member abutting against the sliding seat; The mandrel includes a mandrel body, a first protruding ring and a second protruding ring radially convexly disposed on the mandrel body, the first protruding ring and the second protruding ring being arranged along the axial direction of the mandrel body, the diameter of the first protruding ring being smaller than the diameter of the second protruding ring, the first protruding ring and the second protruding ring being located inside the first annular groove, and the elastic element being used to provide an elastic restoring force for driving the sliding seat to slide from the first protruding ring toward the second protruding ring; The first sealing ring has a first sealing position and a second sealing position: Before the first sealing ring wears out, the first sealing ring abuts against the outside of the first convex ring and the two are in an interference fit. The first sealing ring is located at the first sealing position. The frictional force between the first sealing ring and the first convex ring is greater than or equal to the elastic restoring force of the elastic element. After the first sealing ring wears out, the frictional force between the first sealing ring and the first convex ring is less than the elastic restoring force of the elastic element. The elastic element is used to drive the first sealing ring to move from the first sealing position to the second sealing position. The first sealing ring abuts against the outside of the second convex ring and the two are in an interference fit. When the first sealing ring is in the second sealing position, the sliding seat abuts against the second inner end face of the annular groove; The outer casing has a medium inlet, and the first protruding ring is located on the side of the second protruding ring away from the medium inlet.

2. The distributor with an automatic sealing compensation mechanism according to claim 1, characterized in that: The first convex ring and the second convex ring are arranged at intervals, and the mandrel includes a transition convex ring disposed between the first convex ring and the second convex ring, the diameter of the transition convex ring gradually increasing in the direction close to the second convex ring.

3. The distributor with an automatic sealing compensation mechanism according to claim 2, characterized in that: The transition ring is frustum-shaped, the minimum diameter of the transition ring is equal to the diameter of the first ring, and the maximum diameter of the transition ring is equal to the diameter of the second ring.

4. The distributor with an automatic sealing compensation mechanism according to claim 1, characterized in that: The sliding seat includes an annular sliding body and a second annular groove formed by a radial indentation of the inner periphery of the sliding body for accommodating the first sealing ring.

5. The dispenser with an automatic sealing compensation mechanism according to claim 4, characterized in that: The sliding seat also includes a guide post protruding from one end of the sliding body and parallel to the axial direction of the outer shell, and the elastic element is sleeved on the guide post.

6. The dispenser with an automatic sealing compensation mechanism according to claim 1, characterized in that: The sliding seat is annular, and the automatic sealing compensation mechanism further includes a second sealing ring that abuts against the outer periphery of the sliding seat and the bottom of the first annular groove.

7. The dispenser with an automatic sealing compensation mechanism according to claim 1, characterized in that: The outer casing has a medium inlet, and there are two sets of automatic sealing compensation mechanisms, which are respectively located on both sides of the medium inlet along the axial direction of the outer casing.

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