Mechanical seal for pump

Abstract

The utility model discloses a mechanical seal for a pump in the field of mechanical seals for pumps, which comprises a shell, an end cover, an adjusting mechanism and a connecting mechanism, the end cover is connected to the front end of the shell through the connecting mechanism, the adjusting mechanism is connected to the inside of the shell, a movable ring is arranged on the rear side of the inside of the shell, and the movable ring is connected with the end cover through the connecting mechanism. According to the mechanical seal for the pump, the position of a connecting plate is limited by rotating a rotating button and utilizing cooperation of a sliding block and a sliding groove, so that the position of a threaded cylinder is limited, when the rotating button rotates, the threaded cylinder moves, and the threaded cylinder is driven to rotate, so that the threaded cylinder is driven to rotate; and the rubber ring is extruded and expanded, so that the rubber ring is attached to the outer side wall of the rotating shaft, adjustment is conveniently carried out when the sealing performance is reduced, the sealing performance is correspondingly adjusted, and the service life of the sealing piece is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of mechanical seals for pumps, in particular to a mechanical seal for pumps. Background Art

[0002] A circulating pump is a water pump that circulates water for utilization. The rotating shaft inside the circulating pump runs through the inside and outside of the equipment. There is a gap between the rotating shaft and the equipment, which makes it easy for water to leak out through the gap. Therefore, there must be a shaft sealing device to prevent leakage. Since mechanical seals have the advantages of less leakage and long service life, they are often used for shaft sealing of equipment such as centrifugal pumps, centrifuges, reactors and compressors.

[0003] The sealing performance of the current mechanical seal for pumps will gradually decrease with long-term use and wear, and it is difficult to adjust the sealing performance of the seal accordingly, resulting in a limited service life of the seal. For this reason, we propose a mechanical seal for pumps. Utility Model Content

[0004] The utility model aims to provide a mechanical seal for a pump, so as to solve the problem in the background art that it is difficult to adjust the sealing performance of the seal accordingly, resulting in a limited service life of the seal.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a mechanical seal for a pump, comprising a housing, an end cover, an adjusting mechanism and a connecting mechanism, wherein the end cover is connected to the front end of the housing through the connecting mechanism, the adjusting mechanism is connected to the interior of the housing, a dynamic ring is arranged on the rear side of the interior of the housing, a static ring is arranged on the front side of the dynamic ring, a compression spring is evenly fixedly connected to the front side edge of the static ring, a rotating shaft is connected to the interior of the dynamic ring and the static ring, the adjusting mechanism comprises a threaded cylinder, a rotating knob, a limit block, a sealing sleeve, a rubber ring, a force-bearing column, a connecting plate, a sliding block ... Grooves and limit grooves, the outer front part of the rotating shaft is sleeved with a threaded barrel, the front part of the outer wall of the threaded barrel is screwed with a rotating knob through a thread, the rear side of the rotating knob is evenly fixedly connected to a limiting block, the inside of the threaded barrel is fixedly connected with a sealing sleeve, the outer side of the rotating shaft is sleeved with a rubber ring and is located on the rear side of the threaded barrel, the middle part of the front side of the static ring is fixedly connected with a force column, the rear part of the outer wall of the threaded barrel is fixedly connected with a connecting plate, the outer wall of the connecting plate is symmetrically fixedly connected with a sliding block, the inner wall of the shell is symmetrically provided with sliding grooves, and the middle part of the front side of the end cover is provided with a limiting groove.

[0006] As a further description of the above technical solution:

[0007] The inner side wall of the sealing sleeve is in contact with the outer side wall of the rotating shaft, and a retaining ring is fixedly connected to the front portion of the outer side wall of the threaded barrel.

[0008] As a further description of the above technical solution:

[0009] The outer side wall of the rotating knob is provided with anti-slip grooves, and the limiting block is rotatably clamped in the inner part of the limiting groove.

[0010] As a further description of the above technical solution:

[0011] The slider is slidably connected to the inside of the slide groove, and the outer side wall of the slider is in contact with the inner side wall of the slide groove.

[0012] As a further description of the above technical solution:

[0013] The connecting mechanism includes a fixing hole, a mounting frame, a pull rod, a mounting plate, a connecting spring and a fixing rod. The front part of the outer wall of the shell is symmetrically provided with fixing holes, the outer wall of the end cover is symmetrically fixedly connected with a mounting frame, a pull rod is slidably connected through the middle part of the mutually distant sides of the left and right mounting frames, the opposite ends of the pull rods of the left and right parts are fixedly connected with mounting plates, the front parts of the mutually distant sides of the left and right mounting plates are fixedly connected with a connecting spring, and the front parts of the opposite sides of the left and right mounting plates are fixedly connected with a fixing rod.

[0014] As a further description of the above technical solution:

[0015] The left end of the left connecting spring is fixedly connected to the right side of the left mounting frame, the right end of the right connecting spring is fixedly connected to the left side of the right mounting frame, and the connecting spring is sleeved on the outside of the pull rod.

[0016] Compared with the prior art, the beneficial effects of the utility model are:

[0017] 1. The pump uses a mechanical seal. By turning the knob, the position of the connecting plate is limited by the cooperation of the slider and the slide groove, thereby limiting the position of the threaded barrel. When the knob is turned, the threaded barrel moves, thereby squeezing the rubber ring, causing the rubber ring to expand and fit the rubber ring to the outer wall of the rotating shaft, so that it is convenient to adjust when the sealing performance is reduced, and make corresponding adjustments to the sealing performance to improve the service life of the seal.

[0018] 2. The pump uses a mechanical seal. During installation, the adjustment mechanism is embedded in the shell, the pull rod is pulled to move the mounting plate, the connecting spring is squeezed, the rear side of the end cover is fitted with the front side of the shell, the fixing rod is aligned with the fixing hole, the pull rod is loosened, and the fixing rod is reset by resetting the connecting spring, so that the fixing rod is embedded in the fixing hole and the end cover is fixed, thereby facilitating the installation of the adjustment mechanism, assembling, and later replacement, thereby improving the practicality of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the overall structure of a mechanical seal for a pump proposed by the utility model;

[0020] Figure 2 This is a schematic diagram of the structure of an adjustment mechanism of a mechanical seal for a pump proposed by the utility model;

[0021] Figure 3 A schematic diagram of the structure of a limit groove for a mechanical seal for a pump proposed by the utility model;

[0022] Figure 4 The utility model is a schematic diagram of the connection mechanism structure of a mechanical seal for a pump.

[0023] In the figure: 100, housing; 110, moving ring; 120, stationary ring; 130, compression spring; 140, rotating shaft; 200, end cover; 300, adjusting mechanism; 310, threaded cylinder; 320, rotating knob; 330, limiting block; 340, sealing sleeve; 350, rubber ring; 360, force column; 370, connecting plate; 371, slider; 380, slide groove; 390, limiting groove; 400, connecting mechanism; 410, fixing hole; 420, mounting bracket; 430, pull rod; 440, mounting plate; 450, connecting spring; 460, fixing rod. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, unless otherwise specified, "multiple" means two or more.

[0026] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0027] The utility model provides a mechanical seal for a pump, which is convenient for adjustment when the sealing performance is reduced, and the sealing performance is adjusted accordingly to increase the service life of the seal. Please refer to Figure 1-4 , comprising a housing 100, an end cover 200, an adjustment mechanism 300 and a connection mechanism 400;

[0028] Please refer again Figure 1 , the housing 100 is used to install the end cover 200, the adjustment mechanism 300 and the connection mechanism 400;

[0029] Please refer again Figure 1 The end cover 200 is connected to the front end of the housing 100 through a connecting mechanism 400, the adjusting mechanism 300 is connected to the inside of the housing 100, a dynamic ring 110 is arranged at the rear side of the inside of the housing 100, a static ring 120 is arranged at the front side of the dynamic ring 110, a compression spring 130 is evenly fixedly connected to the front side edge of the static ring 120, and a rotating shaft 140 is connected to the inside of the dynamic ring 110 and the static ring 120;

[0030] Please refer again Figure 2 The adjustment mechanism 300 includes a threaded cylinder 310, a rotating knob 320, a limiting block 330, a sealing sleeve 340, a rubber ring 350, a force-bearing column 360, a connecting plate 370, a slider 371, a sliding groove 380 and a limiting groove 390;

[0031] Please refer again Figure 2 The front part of the outer side of the rotating shaft 140 is sleeved with a threaded barrel 310, the front part of the outer wall of the threaded barrel 310 is screwed with a rotating knob 320 through a thread, the rear side of the rotating knob 320 is evenly fixedly connected to a limit block 330, the inside of the threaded barrel 310 is fixedly connected with a sealing sleeve 340, and the outer side of the rotating shaft 140 is sleeved with a rubber ring 350, which is located at the rear side of the threaded barrel 310;

[0032] Please refer again Figure 2A force-bearing column 360 is fixedly connected to the middle part of the front side of the static ring 120, a connecting plate 370 is fixedly connected to the rear part of the outer wall of the threaded cylinder 310, a slider 371 is symmetrically fixedly connected to the outer wall of the connecting plate 370, a sliding groove 380 is symmetrically opened on the inner wall of the shell 100, and a limiting groove 390 is opened in the middle part of the front side of the end cover 200.

[0033] In summary, by rotating the rotating knob 320, the position of the connecting plate 370 is limited by the cooperation of the slider 371 and the slide groove 380, thereby limiting the position of the threaded tube 310. When the rotating knob 320 is rotated, the threaded tube 310 moves, thereby squeezing the rubber ring 350, causing the rubber ring 350 to expand, and making the rubber ring 350 fit against the outer wall of the rotating shaft 140, so that it is convenient to adjust when the sealing is reduced, and make corresponding adjustments to the sealing performance to improve the service life of the seal.

[0034] Please refer again Figure 2 The inner wall of the sealing sleeve 340 is in contact with the outer wall of the rotating shaft 140 , and a retaining ring is fixedly connected to the front of the outer wall of the threaded cylinder 310 .

[0035] Please refer again Figure 3 The outer wall of the rotating button 320 is provided with anti-slip grooves, and the limiting block 330 is rotatably engaged with the inside of the limiting groove 390.

[0036] Please refer again Figure 2 The slider 371 is slidably connected to the inside of the slide groove 380 , and the outer wall of the slider 371 is in contact with the inner wall of the slide groove 380 .

[0037] Please refer again Figure 4 The connecting mechanism 400 includes a fixing hole 410, a mounting frame 420, a pull rod 430, a mounting plate 440, a connecting spring 450 and a fixing rod 460. The fixing holes 410 are symmetrically opened on the front portion of the outer wall of the housing 100, the mounting frame 420 is symmetrically fixedly connected to the outer wall of the end cover 200, the pull rod 430 is slidably connected through the middle of the mutually distant sides of the left and right mounting frames 420, the mounting plates 440 are fixedly connected to the opposite ends of the left and right pull rods 430, the connecting spring 450 is fixedly connected to the front portion of the mutually distant sides of the left and right mounting plates 440, and the fixing rod 460 is fixedly connected to the front portion of the opposite sides of the left and right mounting plates 440.

[0038] Please refer again Figure 4 The left end of the left connecting spring 450 is fixedly connected to the right side of the left mounting frame 420 , the right end of the right connecting spring 450 is fixedly connected to the left side of the right mounting frame 420 , and the connecting spring 450 is sleeved on the outer side of the pull rod 430 .

[0039] To summarize, during installation, the adjustment mechanism 300 is embedded in the outer shell 100, the pull rod 430 is pulled to move the mounting plate 440, the connecting spring 450 is squeezed, the rear side of the end cover 200 is fitted with the front side of the outer shell 100, the fixing rod 460 is aligned with the fixing hole 410, the pull rod 430 is loosened, and the fixing rod 460 is reset by resetting the connecting spring 450, so that the fixing rod 460 is embedded in the fixing hole 410, and the end cover 200 is fixed, thereby facilitating the installation of the adjustment mechanism 300, facilitating assembly, facilitating later replacement, and improving the practicality of the device.

[0040] In specific use, when installing, the technical personnel of this field will embed the adjustment mechanism 300 inside the housing 100, so that the slider 371 is located inside the slide groove 380, pull the pull rod 430, move the mounting plate 440, squeeze the connecting spring 450, fit the rear side of the end cover 200 with the front side of the housing 100, align the fixing rod 460 with the fixing hole 410, loosen the pull rod 430, and reset the fixing rod 460 by resetting the connecting spring 450, so that the fixing rod 460 is reset inside the fixing rod 460. It is embedded in the fixing hole 410 to fix the end cover 200. When the sealing needs to be adjusted, the rotating knob 320 is rotated, and the position of the connecting plate 370 is limited by the cooperation of the slider 371 and the slide groove 380, thereby limiting the position of the threaded tube 310. When the rotating knob 320 is rotated, the threaded tube 310 moves, thereby squeezing the rubber ring 350, causing the rubber ring 350 to expand, so that the rubber ring 350 fits with the outer wall of the rotating shaft 140, thereby enhancing the sealing.

[0041] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0042] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A mechanical seal for a pump, characterized in that: The invention comprises a housing (100), an end cover (200), an adjustment mechanism (300) and a connection mechanism (400), wherein the end cover (200) is connected to the front end of the housing (100) through the connection mechanism (400), the adjustment mechanism (300) is connected to the inside of the housing (100), a dynamic ring (110) is arranged on the rear side of the inside of the housing (100), a static ring (120) is arranged on the front side of the dynamic ring (110), a compression spring (130) is evenly fixedly connected to the front side edge of the static ring (120), a rotating shaft (140) is connected to the inside of the dynamic ring (110) and the static ring (120), and the adjustment mechanism (300) comprises a threaded cylinder (310), a rotating knob (320), a limit block (330), a sealing sleeve (340), a rubber ring (350), a force-bearing column (360), a connecting plate (370), a slider (371), a slide groove (380), and a plurality of connecting plates (371). ) and a limiting groove (390), the outer front part of the rotating shaft (140) is sleeved with a threaded barrel (310), the outer side wall front part of the threaded barrel (310) is screwed with a rotating knob (320) through a thread, the rear side of the rotating knob (320) is evenly fixedly connected to a limiting block (330), the inside of the threaded barrel (310) is fixedly connected with a sealing sleeve (340), the outer side of the rotating shaft (140) is sleeved with a rubber ring (350), and the position On the rear side of the threaded barrel (310), a force-bearing column (360) is fixedly connected to the middle of the front side of the static ring (120), a connecting plate (370) is fixedly connected to the rear of the outer wall of the threaded barrel (310), a sliding block (371) is symmetrically fixedly connected to the outer wall of the connecting plate (370), sliding grooves (380) are symmetrically provided on the inner wall of the shell (100), and a limiting groove (390) is provided in the middle of the front side of the end cover (200).

2. A mechanical seal for a pump according to claim 1, characterized in that: The inner wall of the sealing sleeve (340) is in contact with the outer wall of the rotating shaft (140), and a retaining ring is fixedly connected to the front portion of the outer wall of the threaded cylinder (310).

3. A mechanical seal for a pump according to claim 1, characterized in that: The outer side wall of the rotating knob (320) is provided with anti-slip grooves, and the limiting block (330) is rotatably engaged with the inside of the limiting groove (390).

4. A mechanical seal for a pump according to claim 1, characterized in that: The slider (371) is slidably connected to the inside of the slide groove (380), and the outer wall of the slider (371) is in contact with the inner wall of the slide groove (380).

5. A mechanical seal for a pump according to claim 1, characterized in that: The connecting mechanism (400) includes a fixing hole (410), a mounting frame (420), a pull rod (430), a mounting plate (440), a connecting spring (450) and a fixing rod (460). The front portion of the outer wall of the housing (100) is symmetrically provided with fixing holes (410), the outer wall of the end cover (200) is symmetrically fixedly connected with the mounting frame (420), the middle portion of the mutually distant sides of the left and right mounting frames (420) is slidably connected with a pull rod (430), the opposite ends of the pull rods (430) of the left and right are fixedly connected with the mounting plates (440), the front portions of the mutually distant sides of the left and right mounting plates (440) are fixedly connected with a connecting spring (450), and the front portions of the opposite sides of the left and right mounting plates (440) are fixedly connected with a fixing rod (460).

6. A mechanical seal for a pump according to claim 5, characterized in that: The left end of the left connecting spring (450) is fixedly connected to the right side of the left mounting frame (420), the right end of the right connecting spring (450) is fixedly connected to the left side of the right mounting frame (420), and the connecting spring (450) is sleeved on the outside of the pull rod (430).

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