High-pressure rotary joint connecting mechanism

Abstract

The utility model discloses a high-pressure rotating joint connecting mechanism which comprises a rotating fixing seat connected with inlet water, a rotating shaft is arranged in the rotating fixing seat, the inlet water flows out through a hollow structure of the rotating shaft, and the rotating shaft is sleeved with a deep groove ball bearing and a sealing piece. The water inlet side of the deep groove ball bearing is limited in an inner groove of the rotary fixing base through a shaft elastic check ring, a hole elastic check ring is arranged on the water outlet side of the deep groove ball bearing, a protruding part is arranged on the water outlet side of the rotary shaft, and the deep groove ball bearing is prevented from moving outwards through the hole elastic check ring and the protruding part. Therefore, the rotating shaft is assembled in the rotating fixing seat. The high-pressure rotary joint connecting mechanism can be used for a high-pressure spray head on an automatic car washer, and is simple to assemble and stable in performance.

Description

TECHNICAL FIELD

[0001] The utility model belongs to rotary joint, concretely relates to a high pressure rotary joint coupling mechanism. BACKGROUND

[0002] Rotary joint is a kind of rotary mechanical seal device, it is for fixed pipeline and rotating roller to convey and exclude heat conducting medium. The heat conducting medium including steam, water, heat conducting oil, hydraulic oil and coolant is applied to rotary joint. In automatic car washer, we realize the conversion of waterway through the rotary joint, and connect high pressure spray head to improve the effect of car washing.

[0003] Most of the existing rotary joints will adopt mechanical seal to realize the connection of dynamic and static components, but in assembly, how to realize simple assembly and how to reduce the wear of rotating shaft during rotation is the key of product design, and the assembly process of existing products is relatively complex, so many manufacturers directly replace the damaged products. INVENTION CONTENTS

[0004] The utility model aims at providing a high pressure rotary joint coupling mechanism, which is simple in structure and convenient for subsequent component maintenance and replacement.

[0005] Technical scheme: a high pressure rotary joint coupling mechanism, comprising a rotating fixed seat connected with water inlet, a rotating shaft is arranged in the rotating fixed seat, water inlet flows out through the hollow structure of the rotating shaft, the rotating shaft is provided with a deep groove ball bearing and a sealing element, the water inlet side of the deep groove ball bearing is limited on the rotating shaft by an elastic retaining ring for shaft, the water inlet side of the deep groove ball bearing abuts against a convex part on the rotating shaft, and the water inlet side of the deep groove ball bearing in the rotating shaft is further fixed in the rotating fixed seat by a hole elastic retaining ring, and the sealing element is used for sealing the contact part of the water inlet side of the rotating shaft and the rotating fixed seat.

[0006] Further, the water inlet on the rotating fixed seat is arranged at 90° with the water channel of the rotating shaft, and the rotating fixed seat comprises a bottom cover arranged at the end opposite to the water inlet of the rotating shaft.

[0007] Further, the water inlet on the rotating fixed seat and the water outlet of the rotating shaft are both provided with a threaded connection port.

[0008] Further, the sealing element is a mechanical sealing element, comprising a Y-shaped sealing ring.

[0009] Further, considering the rotation stability of the rotating shaft in the coupling mechanism, the deep groove ball bearings arranged on the rotating shaft are two or more, and the diameter of the deep groove ball bearing close to the water outlet side is greater than or equal to that of the deep groove ball bearing close to the water inlet side, and the rotating fixed seat is of an open structure at the water outlet side, which is easier to assemble.

[0010] Further, the rotating shaft is provided with a clamping part at the water outlet side for clamping and fixing when the rotating shaft is connected with the component.

[0011] Beneficial effects: the assembly difficulty of the prior art lies in the fixing and sealing effect of the rotating shaft, in order to improve the sealing performance, the friction loss needs to be overcome, which can cause the component to be easily worn, the coupling mechanism provided by the utility model realizes the connection of the rotating shaft and the rotating fixed base through the elastic retaining ring for shaft and the elastic sealing ring for hole and the mechanical sealing element, in assembly, the elastic retaining ring for shaft and the elastic retaining ring for hole are used to fix and limit displacement, at the same time, the diameter of the component gradually decreases from the water outlet end of the rotating shaft to the water inlet, and the rotating fixed base is open from the water inlet to the position of the water outlet end of the rotating shaft, so that the assembly convenience is greatly improved, at the same time, high-pressure water enters from the water inlet, considering the pressure influence of the rotating shaft and the deep groove ball bearing, the elastic retaining ring for hole is used to hinder the displacement of the deep groove ball bearing (rotating shaft), combined with the convex part of the rotating shaft, the pressure of the water flow can be well dispersed and transmitted to the rotating fixed base, so that the product performance is stable. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 is the sectional view of the high-pressure rotating joint coupling mechanism of the utility model;

[0013] Figure 2 is the structure schematic diagram after assembly;

[0014] Figure 3 is the explosion view of parts;

[0015] Figure 4 is the structure schematic diagram of the rotating shaft (after assembly) and the rotating fixed base after separation. DETAILED DESCRIPTION

[0016] In order to explain the technical scheme provided by the utility model in detail, the composition and assembly of the high-pressure rotating joint coupling mechanism will be further explained below in combination with the drawings.

[0017] In combination with Figures 1-4 the utility model discloses a high-pressure rotating joint coupling mechanism, which comprises a rotating fixed base 1, a high-pressure water inlet and a high-pressure water outlet (the hollow structure of a rotating shaft 2 serves as a water outlet pipeline) on the high-pressure fixed base 1 are 90 DEG, and of course, in other embodiments, the high-pressure water inlet on the high-pressure fixed base 1 is a threaded hole, and the end part of the rotating shaft 2 at the water outlet is also provided with a threaded connecting part, so as to be connected with a water pipe, a car washer nozzle and the like.

[0018] Referring to Figure 1 and Figure 3 , Figure 4The rotating fixing base 1 adopts a two-halves shell structure to facilitate assembly, and more preferably, the internal components are replaced by disassembling and assembling the bottom cover 101.

[0019] For the assembly of the rotating shaft 2 and its related components, first, the deep groove ball bearing 3 is sleeved on the rotating shaft 2, the number of which is not limited, and is designed according to the length of the rotating shaft 2. One side of the deep groove ball bearing 3 is attached to the protruding part 201 of the rotating shaft 2, and the other side is fixed by the shaft elastic retainer 5. After the shaft elastic retainer 5 is clamped into the clamping groove 202 on the rotating shaft 2 to complete the assembly, the water inlet of the rotating shaft 2 is assembled with the sealing element 4. The sealing element 4 is a mechanical sealing element, including a dynamic ring, a static ring, and a spring structure. We should know that one end face is fixed on the rotating shaft (dynamic ring), and the other end face is fixed on the static device shell (static ring). When the device is running, the dynamic ring rotates with the shaft, and the static ring remains stationary. By applying pressure through a spring or other elastic element, the dynamic ring and the static ring are in close contact to form a very thin liquid film. This liquid film can not only play a lubricating role, but also can prevent fluid leakage. After the rotating shaft 2 is assembled in the rotating fixing base 1, finally, on the water outlet side, the hole elastic retainer 6 is used to complete the assembly of the entire high-pressure rotating joint coupling mechanism.

[0020] Further, through Figures 1-4 We can also know that the rotating fixing base 5 in the utility model can be an integrally formed structure, which improves its structural stability and pressure resistance, and is suitable for high-pressure water outlet. For the bottom cover or two-halves shell structure, it is suitable for smaller water pressure or needs to clean the internal impurities regularly. In order to facilitate the connection of the water outlet and the high-pressure spray head, the rotating shaft 2 in the utility model is provided with a clamping part 203 on the protruding part 201, which is used for clamping and fixing when screwing, and controlling the rotation of the rotating shaft 2.

[0021] Finally, we analyze the sealing and stress of the high-pressure rotary joint connecting mechanism. In the mechanism, the rotary shaft 2 and the rotary fixed seat 1 are connected by a mechanical seal, which is a component known in the art. The mechanical seal has good sealing performance in liquid, gas and other aspects. Although it has a small amount of wear, it can greatly improve the wear resistance of the rotary joint connection. After the rotary shaft 2 is assembled with the rotary fixed seat 1, the hole elastic retainer 6 is assembled, the hole elastic retainer 6 is tightly fitted on the inner wall of the rotary fixed seat 1 by expansion force, which prevents the deep groove ball bearing 3 from moving away, does not contact the rotary shaft 2, and thus does not hinder the rotation of the rotary shaft 2. However, the deep groove ball bearing 3 is limited to separate from the rotary shaft 2. The shaft elastic retainer 5 on the other side of the deep groove ball bearing 3 limits the separation of the rotary shaft 2. In the overall assembly, the shaft elastic retainer 5 and the hole elastic retainer 6 are the stress points of the two connections. Obviously, the contact surface of the shaft elastic retainer 5 is smaller than the stress surface of the hole elastic retainer 6. From the water inlet to the water outlet, the pressure is dispersed from the shaft elastic retainer 5 to the hole elastic retainer 6, and back to the rotary fixed seat 1. In the actual use process, we find that the rotary shaft 2 of the mechanism moves relatively stably, and the overall sealing performance and quality are improved.

Claims

1. A high-pressure rotary joint coupling mechanism comprising a rotary fixed seat (1) connected to water inlet, a rotary shaft (2) is arranged in the rotary fixed seat (1), the water inlet flows out through the hollow structure of the rotary shaft (2), characterized in that, The rotating shaft (2) is fitted with a deep groove ball bearing (3) and a seal (4). The water inlet side of the deep groove ball bearing (3) is fixed to the rotating shaft (2) by a shaft elastic retaining ring (5). The water inlet side of the deep groove ball bearing (3) abuts against the protrusion (201) on the rotating shaft (2). The water inlet side of the deep groove ball bearing (3) on the rotating shaft (2) is also fixed in the rotating fixed seat (1) by a hole elastic retaining ring (6). The seal (4) is used to seal the contact between the water inlet side of the rotating shaft (2) and the rotating fixed seat (1).

2. The high-pressure rotary joint connection mechanism according to claim 1, characterized in that, The water inlet on the rotating fixed base (1) and the water passage of the rotating shaft (2) are set at 90°.

3. The high-pressure rotary joint connection mechanism according to claim 2, characterized in that, Both the inlet on the rotating fixed base (1) and the outlet on the rotating shaft (2) are provided with threaded connection ports.

4. The high-pressure rotary joint connection mechanism according to claim 1, characterized in that, The sealing element (4) is a mechanical seal.

5. The high-pressure rotary joint connection mechanism according to claim 1, characterized in that, The rotating shaft (2) is fitted with two or more deep groove ball bearings (3), and the diameter of the deep groove ball bearing (3) closer to the water outlet side is greater than or equal to that of the deep groove ball bearing (3) closer to the water inlet side.

6. The high-pressure rotary joint connection mechanism according to claim 1, characterized in that, The rotating shaft (2) is provided with a clamping part (203) on the water outlet side for clamping and fixing when the rotating shaft (2) is connected to the component.

7. The high-pressure rotary joint connection mechanism according to claim 1 or 4, characterized in that, The sealing element (4) is a Y-type sealing ring.

8. The high-pressure rotary joint connection mechanism according to claim 1, characterized in that, The rotating fixed base (1) includes a bottom cover (101) which is located at the end of the water inlet of the rotating shaft (2).

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