Sealing structure of shaft body and double-rotor flow meter applying sealing structure

Abstract

The utility model provides a sealing structure of a shaft body and a double-rotor flow meter applying the sealing structure, and particularly relates to the technical field of mechanical sealing. The sealing structure of the shaft body comprises a shell, the shaft body and a sealing assembly. A connecting part is arranged at the end part of the shaft body, the connecting part is rotationally connected to the shell through a rotating part, and at least one limiting surface is arranged at one end, close to the connecting part, of the shaft body; the sealing assembly is located between the radial outer side of the connecting part and the shell and comprises a sealing ring base, a movable sealing ring, a static sealing ring and an elastic piece. The sealing ring seat is sleeved on the connecting part; the dynamic and static sealing rings are arranged on the sealing ring seat and are positioned between the limiting surface of the shaft body and one end surface of the sealing ring seat; and the elastic piece is positioned between the other end face of the sealing ring seat and the rotating part. The double-rotor flowmeter can effectively solve the problem that in the actual using process of a double-rotor flowmeter in the prior art, the sealing effect is poor due to the fact that a sealing structure of the double-rotor flowmeter is prone to abrasion.

Description

Technical Field

[0001] The utility model relates to the technical field of mechanical seals, in particular to a shaft body sealing structure and a double-rotor flowmeter using the same. Background Art

[0002] The flowmeter usually drives the rotor to operate through the inlet and outlet pressure difference, and uses the sensor to process the intelligent electronic counter to achieve intelligent display of the accumulated flow and instantaneous flow. Among them, the sealing part of the metering chamber of the dual-rotor flowmeter is placed between the upper and lower bearings of the flowmeter and the rotor, with an adjustment washer in the middle. When the flowmeter is in operation for a long time, the adjustment washer is easy to wear, thereby shortening the service life of the rotor and affecting the product quality.

[0003] At the same time, when the twin rotor flowmeter is in use, the two rotors are prone to get stuck. Therefore, when encountering sandy media, it wears out quickly, resulting in reduced measurement accuracy and increased maintenance costs. Utility Model Content

[0004] In view of the shortcomings of the prior art mentioned above, the purpose of the utility model is to provide a dual-rotor flowmeter with a shaft sealing structure and an application thereof, so as to solve the problem that the sealing structure of the dual-rotor flowmeter in the prior art is prone to wear during actual use, resulting in poor sealing effect, and the two rotors are prone to wear due to the medium.

[0005] In order to achieve the above-mentioned purpose and other related purposes, the utility model provides a shaft sealing structure, which includes:

[0006] case;

[0007] A shaft body, an end of which is provided with a connecting portion, the connecting portion is rotatably connected to the housing through a rotating component, and at least one limiting surface is provided at one end of the shaft body close to the connecting portion; and

[0008] A sealing assembly, located between the radially outer side of the connecting portion and the housing, comprising:

[0009] A sealing ring seat, which is sleeved on the connecting portion;

[0010] a dynamic and static sealing ring, which is arranged on the sealing ring seat and is located between the limiting surface of the shaft body and an end surface of the sealing ring seat; and

[0011] An elastic member is located between the other end surface of the sealing ring seat and the rotating component.

[0012] In an embodiment of the present invention, a connecting hole is formed on the housing, and the connecting portion and the rotating component are adaptively installed in the connecting hole.

[0013] In an embodiment of the present invention, the rotating component is a bearing, an outer ring of the bearing is fixedly connected to the housing, and an inner ring of the bearing is fixedly connected to the connecting portion.

[0014] In one embodiment of the present invention, an adjusting gasket is further included, which is sleeved between the connecting portion and the sealing ring seat.

[0015] In one embodiment of the present invention, a gasket is further included, which is sleeved on the adjusting washer and disposed between the elastic member and the bearing.

[0016] In an embodiment of the present invention, the dynamic and static sealing rings are made of tungsten carbide.

[0017] In an embodiment of the present invention, an annular groove is formed on the inner wall of the connecting hole, an O-type sealing ring is disposed in the annular groove, and the O-type sealing ring is located between the sealing ring seat and the annular groove.

[0018] The utility model also provides a dual rotor flow meter, which comprises:

[0019] A sealing structure for the shaft as described above;

[0020] Wherein, the shaft body is a rotor, the rotor includes two, and the two rotors are meshed and driven through a gear pair.

[0021] In an embodiment of the present invention, the rotor is a circular arc cycloid three-tooth helical rotor, and a gap area is always reserved between two circular arc cycloid three-tooth helical rotors.

[0022] As described above, the utility model provides a sealing structure of a shaft body and a dual-rotor flowmeter using the same. The sealing structure reduces the friction caused by the shaft body after rotation by installing a spring on the sealing ring seat to achieve gap adjustment, thereby extending the service life of the dynamic and static sealing rings and improving product quality. At the same time, the dynamic and static sealing rings made of tungsten carbide have greatly enhanced wear resistance and flexible operation, thereby improving product quality. At the same time, in the dual-rotor flowmeter, the gap between the spiral rotors is controlled by adding a synchronous gear to ensure that the two rotors are not in contact. Therefore, when measuring media containing sand or impurities, it is not easy to wear, and the measurement accuracy of the dual-rotor flowmeter can be maintained for a long time. It can effectively solve the problem that the sealing structure of the dual-rotor flowmeter in the prior art is prone to wear during actual use, resulting in poor sealing effect, and the two rotors are prone to wear due to the medium. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0024] Figure 1 It is a structural schematic diagram of a circular arc cycloid three-tooth spiral rotor in one embodiment of a dual-rotor flowmeter of the utility model;

[0025] Figure 2 It is a three-dimensional structural schematic diagram of a circular arc cycloid three-tooth spiral rotor in an embodiment of a dual-rotor flowmeter of the utility model;

[0026] Figure 3 It is a structural schematic diagram of a sealing structure of a shaft body in an embodiment of the utility model;

[0027] Figure 4 for Figure 3 Schematic diagram of the structure enlarged at point A in the middle.

[0028] Component number description

[0029] 10. Arc cycloid three-tooth spiral rotor; 11. Gear pair; 1101. Output gear; 1102. Synchronous gear; 1103. Left-handed spiral rotor; 1104. Right-handed spiral rotor;

[0030] 100, housing; 110, connecting hole;

[0031] 200, shaft body; 210, connecting portion; 211, limiting surface;

[0032] 300, sealing assembly; 310, sealing ring seat; 320, dynamic and static sealing rings; 330, elastic member; 340, bearing; 350, gasket; 360, adjusting washer; 370, O-ring. DETAILED DESCRIPTION

[0033] The following describes the implementation of the present invention through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific implementations, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the following embodiments and features in the embodiments can be combined with each other without conflict.

[0034] It should be noted that the illustrations provided in the following embodiments are only schematic illustrations of the basic concept of the present invention, and thus the drawings only show components related to the present invention rather than being drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component may be changed at will, and the component layout may also be more complicated.

[0035] See also Figures 1 to 4 The utility model provides a dual rotor flowmeter, which at least includes a housing 100 and a shaft 200 connected to the inside of the housing 100. At the same time, a sealing structure of the shaft 200 is also connected between the shaft 200 and the housing 100, and the sealing structure of the shaft 200 can effectively improve the sealing performance of the shaft 200 and the housing 100 at the connection position.

[0036] It should be noted that, for the dual rotor flowmeter, the shaft body 200 located inside the dual rotor flowmeter may be a rotor structure. For example, the rotor may be a circular arc cycloid three-tooth spiral rotor 10. The rotor includes two rotors, and the two rotors rotate in opposite directions. When the two rotors are rotating, the medium used to measure the flow may pass between the two rotors, and the medium may also drive the two rotors to rotate.

[0037] In one embodiment, the two rotors are meshed and driven by a gear pair 11. For example, a gear may be fixedly connected to the end of the rotor, and the gear structure between the two rotors is the same and is in a meshing state. The gear may be a spur gear or a helical gear, but is not limited to this and may be determined according to actual needs. At the same time, the gear on one rotor is an output gear 1101, and the gear on the other rotor is a synchronous gear 1102. Therefore, the synchronous gear 1102 can be driven to rotate by the rotation of the output gear 1101. It can be understood that for the two rotors, one rotor is connected to a left-handed spiral rotor 1103, and the other rotor is connected to a right-handed spiral rotor 1104. The left-handed spiral rotor 1103 and the right-handed spiral rotor 1104 are meshed.

[0038] Furthermore, since the two rotors are meshed and driven by the gear pair 11, the two gears of the gear pair 11 can be allowed to define the distance between the two rotor axes. It can be understood that the gap between the spiral rotors can be effectively controlled by the meshing relationship between the output gear 1101 and the synchronous gear 1102 to ensure that the two rotors do not contact each other. At the same time, when measuring media containing sand or impurities, it is not easy to wear and the measurement accuracy of the dual rotor flowmeter can be maintained for a long time.

[0039] See also Figure 3 and Figure 4In one embodiment, the sealing structure of the shaft body 200 may include a sealing assembly 300, and the sealing assembly 300 is located between the shaft body 200 and the housing 100. The sealing assembly 300 can effectively improve the sealing effect between the shaft body 200 and the housing 100. In addition, the problem that the sealing structure of the dual rotor flowmeter in the prior art is easily worn during actual use, resulting in poor sealing effect, is improved.

[0040] Specifically, a connecting portion 210 is provided at the end of the shaft body 200, and the connecting portion 210 is rotatably connected to the housing 100 through a rotating component. At least one limiting surface 211 is provided at the end position of the connecting portion 210. Meanwhile, for the sealing assembly 300, it includes a sealing ring seat 310, a dynamic and static sealing ring 320, and an elastic member 330. The sealing ring seat 310 is located on the housing 100, and the dynamic and static sealing ring 320 is sleeved on the connecting portion 210. It can be understood that one end face of the dynamic and static sealing ring 320 is connected to the limiting surface 211, and the other end face is connected to the sealing ring seat 310. Therefore, through the sealing ring seat 310, the dynamic and static sealing ring 320 can be tightly connected to the limiting surface 211. It can be understood that when the shaft body 200 is rotating, friction may be generated between the limiting surface 211 and the dynamic and static sealing ring 320. Therefore, in order to reduce the friction loss between the shaft 200 and the dynamic and static sealing ring 320, in one embodiment, the dynamic and static sealing ring 320 can be made of tungsten carbide. By making the dynamic and static sealing ring 320 of tungsten carbide, the friction loss of the dynamic and static sealing ring 320 in actual use can be effectively reduced.

[0041] Specifically, the elastic member 330 is located between the sealing ring seat 310 and the housing 100, and the elastic member 330 can drive the dynamic and static sealing ring 320 to have a movement tendency close to the limiting surface 211. At the same time, through the compressibility of the elastic member 330, the friction loss of the dynamic and static sealing ring 320 can be reduced during the rotation of the shaft body 200.

[0042] See also Figure 3 and Figure 4 In one embodiment, a connection hole 110 may be provided on the housing 100, and the connection portion 210 and the rotating component may be adapted to be installed in the connection hole 110. In one embodiment, the rotating component is a bearing 210, and the connection portion 210 is connected to a bearing 340. Specifically, the outer ring of the bearing 340 is fixedly connected to the housing 100, and the inner ring is fixedly connected to the connection portion 210. The bearing 340 may be a deep groove ball bearing 340, but is not limited thereto. The specific model of the bearing 340 may be determined according to actual needs.

[0043] It is understandable that in order to improve the use effect of the device in actual use, a gasket 350 may be provided above the bearing 340. The gasket 350 is sleeved on the adjustment washer 360 and is provided between the elastic member 330 and the bearing 340, and a gap area is also reserved between the inner diameter of the gasket 350 and the connecting portion 210. The gap area facilitates the rotation of the shaft body 200 and avoids the wear between the gasket 350 and the shaft body 200.

[0044] Further, for the gasket 350, a protrusion is provided on one side of the gasket 350, and the protrusion is connected to the outer ring of the bearing 340. At the same time, the elastic member 330 is connected to the other side of the gasket 350, and the elastic member 330 is supported by the pad, thereby generating a certain elastic force. Specifically. For the elastic member 330, a spring may be used. The elastic member 330 is in a compressed state during normal assembly. The elastic force generated by the elastic member 330 in the compressed state can make the dynamic and static sealing ring 320 tightly connected to the limiting surface 211.

[0045] See also Figure 3 and Figure 4 In one embodiment, in order to improve the stability of the shaft body 200 during the rotation process in the actual use of the device, an adjustment washer 360 can be sleeved on the connecting portion 210, and the adjustment washer 360 is sleeved between the connecting portion 210 and the sealing ring seat 310, and the actual length of the adjustment washer 360 can be matched and adjusted according to the length of the connecting portion 210. At the same time, one end of the adjustment washer is connected to the limiting surface 211, and the other end is connected to the inner ring of the bearing 340. And, for the elastic member 330 and the sealing ring seat 310, they are respectively located on the periphery of the adjustment washer.

[0046] See also Figure 4 In one embodiment, an O-ring 370 is allowed to be connected to the housing 100, and the O-ring 370 is located at the periphery of the sealing ring seat 310. Specifically, an annular groove may be provided on the inner wall of the connecting hole 110, and the O-ring 370 is located between the sealing ring seat 310 and the annular groove. Therefore, the O-ring 370 may be used to improve the sealing effect of the gap between the sealing ring seat 310 and the housing 100 during actual use of the device.

[0047] In summary, the utility model provides a sealing structure of an axis body and a dual-rotor flowmeter using the same. The sealing structure reduces the friction caused by the axis body 200 after rotation by installing a spring on the sealing ring seat 310, thereby adjusting the gap and extending the service life of the sealing structure to improve product quality. The dynamic and static sealing rings 320 made of tungsten carbide have greatly enhanced wear resistance and flexible operation, thereby improving product quality. At the same time, in the dual-rotor flowmeter, the gap between the spiral rotors can be controlled by adding a synchronous gear 1102 to ensure that the two rotors are not in contact. In addition, when measuring media containing sand or impurities, it is not easy to wear, and the measurement accuracy of the dual-rotor flowmeter can be maintained for a long time. Therefore, it can effectively solve the problem that the sealing structure of the dual-rotor flowmeter in the prior art is prone to wear during actual use, resulting in poor sealing effect, and the two rotors are prone to wear due to the medium.

[0048] Therefore, the utility model effectively overcomes various shortcomings in the prior art and has high industrial utilization value.

[0049] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the technology may modify or change the above embodiments without violating the spirit and scope of the present invention. Therefore, all equivalent modifications or changes made by those with ordinary knowledge in the technical field without departing from the spirit and technical ideas disclosed in the present invention should still be covered by the claims of the present invention. As used in the description herein and in the entire claims below, unless otherwise specified, "one", and "the" include plural references. Similarly, as used in the description herein and in the entire claims below, unless otherwise specified, the meaning of "in..." includes "in..." and "on...".

[0050] The above description of the illustrated embodiments of the present invention (including that described in the Abstract of the Specification) is not intended to be an exhaustive list or to limit the present invention to the precise form disclosed herein. Although specific embodiments of the present invention and examples of the present invention are described herein for illustrative purposes only, various equivalent modifications are possible within the spirit and scope of the present invention as will be recognized and understood by those skilled in the art. As noted, these modifications may be made to the present invention in accordance with the above description of the embodiments described in the present invention, and these modifications will be within the spirit and scope of the present invention.

Claims

1. A sealing structure of a shaft, characterized in that: include: Housing (100); A shaft body (200), with a connecting portion (210) provided at an end thereof, the connecting portion (210) being rotatably connected to the housing (100) via a rotating component, and at least one limiting surface (211) being provided at one end of the shaft body (200) close to the connecting portion (210); as well as A sealing assembly (300) is located between the radially outer side of the connecting portion (210) and the housing (100), and comprises: A sealing ring seat (310) sleeved on the connecting portion (210); a dynamic and static sealing ring (320), which is arranged on the sealing ring seat (310) and is located between a limiting surface (211) of the shaft body (200) and an end surface of the sealing ring seat (310); and An elastic member (330) is located between the other end surface of the sealing ring seat (310) and the rotating component.

2. The sealing structure of the shaft according to claim 1, characterized in that: The housing (100) is provided with a connection hole (110), and the connection portion (210) and the rotating component are adaptively installed in the connection hole (110).

3. The sealing structure of the shaft according to claim 1 or 2, characterized in that: The rotating component is a bearing (340), an outer ring of the bearing (340) is fixedly connected to the housing (100), and an inner ring of the bearing (340) is fixedly connected to the connecting portion (210).

4. The sealing structure of the shaft body according to claim 3, characterized in that: It also includes an adjusting gasket (360) which is sleeved between the connecting portion (210) and the sealing ring seat (310).

5. The sealing structure of the shaft according to claim 4, characterized in that: It also includes a gasket (350) which is sleeved on the adjustment gasket (360) and is arranged between the elastic member (330) and the bearing (340).

6. The sealing structure of the shaft according to claim 1, characterized in that: The dynamic and static sealing rings (320) are made of tungsten carbide.

7. The sealing structure of the shaft according to claim 2, characterized in that: An annular groove is provided on the inner wall of the connecting hole (110), an O-type sealing ring (370) is arranged in the annular groove, and the O-type sealing ring (370) is located between the sealing ring seat (310) and the annular groove.

8. A dual rotor flow meter, characterized in that: include: The sealing structure of the shaft body according to any one of claims 1 to 7; The shaft body (200) is a rotor, the rotor comprises two rotors, and the two rotors are meshed and driven via a gear pair (11).

9. The dual rotor flow meter according to claim 8, characterized in that: The rotor adopts a circular arc cycloid three-tooth helical rotor (10), and a gap area is always reserved between two circular arc cycloid three-tooth helical rotors (10).

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