Shaft sealing structure for slurry pump

Abstract

The shaft sealing structure for the slurry pump comprises a pump body and a main shaft arranged on the inner side of the pump body, an end cover is fixedly installed on the left end face of the pump body through a bolt structure, the pump body comprises a pump shell and a connecting groove, an adjusting assembly is connected into the end cover in a penetrating mode, and the adjusting assembly comprises an adjusting block, a connecting rod and a connecting block. The end, close to the main shaft, of the adjusting assembly is connected with a limiting assembly. The limiting assembly is composed of a connecting block, a pressing rod and a pressing block. The main shaft is rotationally arranged on the inner side of the pump body, the outer surface of the main shaft is sleeved with an adjusting assembly, the outer side of the adjusting assembly is connected with a sealing ring, the right end face of the sealing ring is fixedly connected with a convex ring, and a mounting assembly is arranged on the left side of the sealing ring. According to the shaft sealing structure for the slurry pump, the problems that most of existing shaft sealing structures cannot conveniently press a shaft body sealing piece, the connection tightness is low, and most of the existing shaft sealing structures cannot conveniently adjust the pressing force according to the use condition are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of sealing structures, in particular to a shaft sealing structure for a slurry pump. Background Technique

[0002] A slurry pump generally refers to a pump suitable for transporting liquids (water) containing suspended solids. Currently, slurry pumps are one of the indispensable devices in each process flow of ore dressing and coal preparation plants. Since the medium transported by the slurry pump generally contains a large number of suspended solid particles, if the medium leaks out, it is very easy to cause wear on working parts such as the rotating shaft. Therefore, an effective sealing structure is required to seal both sides inside and outside the rotating shaft.

[0003] For example, a mechanical sealing structure of a slurry pump with the Chinese patent authorization publication number CN212079728U includes a pump body and a pump shell fixedly connected to the pump body. A rotatable main shaft is arranged on the pump body. The outer end of the main shaft is provided with an external thread and extends to the outside of the pump shell. A shaft sleeve is sleeved on the main shaft. A flange ring is arranged at the exposed end of the shaft sleeve. The shaft sleeve is locked on the main shaft by cooperating with the external thread at the outer end of the main shaft through a nut. A end cover is fixedly embedded on the side of the pump shell close to the pump body. The end cover and the pump shell form a sealed chamber. A stationary sealing ring is embedded on the side of the end cover away from the pump body. A rotating sealing ring is sleeved on the shaft sleeve. Both ends of the rotating sealing ring are in close fit and abut against the stationary sealing ring and the flange ring respectively. The stationary sealing ring, the shaft sleeve, and the rotating sealing ring maintain precise fit when the main shaft rotates at high speed to keep the sealed chamber in a sealed state, preventing the slurry in the pump body from leaking into the sealed chamber. The structure of this embodiment is simple, the parts are convenient to process, the cost is low, the structural cooperation is precise, and the sealing effect is good.

[0004] However, most of the existing shaft sealing structures still have some deficiencies in use. For example, most of the existing shaft sealing structures are not convenient to press the shaft body seal, the connection tightness is relatively low, and most of them are not convenient to adjust the pressing force according to the use situation. Therefore, there are certain use defects. Therefore, we propose a shaft sealing structure for a slurry pump to solve the problems mentioned above.

[0005] Therefore, those skilled in the art urgently need to design a shaft sealing structure for a slurry pump. Content of the Utility Model

[0006] (1) Technical Problems to be Solved

[0007] Aiming at the deficiencies of the prior art, the utility model provides a shaft sealing structure for a slurry pump, which solves the problems that most of the existing shaft sealing structures are not convenient to press the shaft body seal, the connection tightness is relatively low, and most of them are not convenient to adjust the pressing force according to the use situation.

[0008] (2) Technical Solutions

[0009] To achieve the above object, the utility model is realized by the following technical solutions:

[0010] A shaft sealing structure for a slurry pump, the shaft sealing structure for the slurry pump includes a pump body and a main shaft arranged inside the pump body. Among them,

[0011] The left end face of the pump body is fixedly installed with an end cover through a bolt structure, and the pump body includes a pump shell and a connection groove. The inside of the end cover is connected through an adjusting component, and the adjusting component includes an adjusting block, a connecting rod and a connecting block. One end of the adjusting component close to the main shaft is connected with a limiting component, and the limiting component is composed of a connecting block, a pressing rod and a pressing block;

[0012] The main shaft is rotatably arranged inside the pump body, and the outer surface of the main shaft is sleeved and connected with an adjusting component. The outside of the adjusting component is connected with a sealing ring, and the right end face of the sealing ring is fixedly connected with a convex ring. The left side of the sealing ring is provided with an installation component, and the installation component includes a first moving ring, a connecting ring and a second moving ring.

[0013] In a possible implementation manner, a connection groove is opened on the left end face of the pump shell, and the convex rings are arranged in one-to-one correspondence with the connection groove on the left and right, and the convex rings are connected with the pump shell through the connection groove to form a fitting connection.

[0014] In a possible implementation manner, the second moving ring is attached to the left end face of the sealing ring, and the left end of the second moving ring is fixedly connected with a connecting ring.

[0015] In a possible implementation manner, the vertical section of the connecting ring is trapezoidal, and the left end of the connecting ring is fixedly connected with a first moving ring.

[0016] In a possible implementation manner, the connecting rod is threadedly connected inside the end cover, and one end of the adjusting block away from the central axis of the main shaft is fixedly connected with an adjusting block, and one end of the adjusting block close to the central axis of the main shaft is fixedly connected with a connecting block.

[0017] In a possible implementation manner, the outside of the connecting block is rotatably connected with a connecting block, and one end of the connecting block close to the central axis of the main shaft is fixedly connected with a pressing rod, and both the connecting block and the pressing rod are slidably connected inside the end cover.

[0018] In a possible implementation manner, one end of the pressing rod close to the central axis of the main shaft is fixedly connected with a pressing block, and the pressing block is attached to the outer surface of the connecting ring.

[0019] In a possible implementation manner, both the adjusting component and the limiting component are symmetrically arranged up and down about the central axis of the main shaft.

[0020] (III) Beneficial effects

[0021] The present utility model provides a shaft seal structure for a slurry pump. An engagement groove is provided on the left end face of the pump casing, and the convex rings are arranged in one-to-one correspondence with the engagement groove on the left and right. Since the convex rings are fitted and connected to the pump casing through the engagement groove, the connection at the joint is made more tight, thereby improving the connection tightness between the sealing ring and the pump body.

[0022] The present utility model provides a shaft seal structure for a slurry pump. By rotating the adjusting block, the position-limiting component can be adjusted to move inside the end cover, and then the installation component is pressed and limited by the position-limiting component, which is convenient for converting the radial movement of the adjusting component into the axial movement of the installation component, so that the installation component presses the sealing ring, and the connection part of the pump body is sealed by the sealing ring, which is convenient for pressing the shaft seal.

[0023] The present utility model provides a shaft seal structure for a slurry pump. The adjusting component and the position-limiting component play a role in limiting and adjusting the installation component. Since the outer surface of the connecting ring is inclined, the radial movement of the position-limiting component can be converted into the lateral movement of the installation component. By rotating and adjusting the adjusting component, the extrusion degree of the installation component on the sealing ring can be controlled, solving the problem that most of the existing shaft seal structures are not convenient to adjust the pressing force according to the usage conditions, and making the practicability better. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The above description is only an overview of the technical solution of the present utility model. In order to be able to understand the technical means of the present utility model more clearly and implement it according to the content of the specification, the following takes the preferred embodiment of the present utility model and combines with the drawings to describe in detail as follows.

[0025] Figure 1 It is a structural schematic diagram of the front view section in the first embodiment;

[0026] Figure 2 It is a schematic diagram of the overall connection structure of the adjusting component and the position-limiting component in the first embodiment;

[0027] Figure 3 For the first embodiment Figure 1 An enlarged structural schematic diagram of part A therein;

[0028] Figure 4 It is a schematic diagram of the overall structure of the installation component in the first embodiment;

[0029] LEGEND DESCRIPTION: 1 - pump body; 101 - pump casing; 102 - engagement groove; 2 - end cover; 3 - main shaft; 4 - sealing ring; 5 - convex ring; 6 - installation component; 601 - first moving ring; 602 - connecting ring; 603 - second moving ring; 7 - adjusting component; 701 - adjusting block; 702 - connecting rod; 703 - connecting block; 8 - position-limiting component; 801 - connecting block; 802 - pressing rod; 803 - pressing block. Detailed implementation mode

[0030] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative work belong to the scope of protection of the present utility model. In addition, for the convenience of description below, the "upper", "lower", "left", "right", etc. cited are consistent with the upper, lower, left, right, etc. of the accompanying drawings themselves. The "first", "second", etc. in the following text are used for distinction in description and have no other special meaning.

[0031] In view of the problems existing in the prior art, the present utility model provides a shaft seal structure for a slurry pump. The shaft seal structure for a slurry pump includes a pump body and a main shaft arranged inside the pump body, which is specifically described as follows:

[0032] 1 - Pump body

[0033] The left end face of the above-mentioned pump body is fixedly installed with an end cover through a bolt structure, and the pump body includes a pump shell and a connection groove. The inside of the above-mentioned end cover is connected through an adjustment component, and the adjustment component includes an adjustment block, a connection rod, and a connection block. One end of the above-mentioned adjustment component close to the main shaft is connected with a limit component, and the limit component is composed of a connection block, a pressure rod, and a pressure block. By rotating the adjustment block, the movement of the limit component inside the end cover can be adjusted, and then the installation component can be pressed and limited through the limit component, facilitating the conversion of the radial movement of the adjustment component into the axial movement of the installation component, so that the installation component presses the sealing ring, and the connection part of the pump body is sealed through the sealing ring.

[0034] In some examples, a connection groove is opened on the left end face of the above-mentioned pump shell, and the convex rings are arranged in one-to-one correspondence with the connection grooves left and right, and the convex rings are connected with the pump shell through the connection grooves to form a fitting connection. Through the fitting connection between the convex ring and the pump shell, the connection sealing performance between the sealing ring and the pump body is improved.

[0035] In some examples, the above-mentioned connection rod is threadedly connected inside the end cover, and one end of the adjustment block away from the central axis of the main shaft is fixedly connected with an adjustment block, and one end of the adjustment block close to the central axis of the main shaft is fixedly connected with a connection block. The adjustment component plays a role in connecting and limiting the limit component. At the same time, the movement of the limit component inside the end cover can be controlled by rotating the adjustment component.

[0036] In some examples, a connection block is rotatably connected to the outside of the above-mentioned connection block, and one end of the connection block close to the central axis of the main shaft is fixedly connected with a pressure rod, and both the connection block and the pressure rod are slidably connected inside the end cover. By rotating the adjustment component inside the pump body, the connection block and the pressure rod can be driven to slide up and down inside the end cover.

[0037] In some examples, a pressing block is fixedly connected to one end of the above-mentioned pressing rod close to the central axis of the main shaft, and the pressing block is fitted and connected to the outer surface of the connecting ring. By sliding the pressing rod inside the end cover towards the main shaft, the pressing block can be pressed against the connecting ring.

[0038] In some examples, the above-mentioned adjusting assembly and limiting assembly are both symmetrically arranged up and down with respect to the central axis of the main shaft. The adjusting assembly and the limiting assembly play a role in limiting and adjusting the mounting assembly.

[0039] 3 - Main shaft

[0040] The above-mentioned main shaft is rotatably arranged inside the pump body, and an adjusting assembly is sleeved on the outer surface of the main shaft. A sealing ring is connected to the outside of the adjusting assembly, and a convex ring is fixedly connected to the right end face of the sealing ring. An installation assembly is arranged on the left side of the sealing ring, and the installation assembly includes a first moving ring, a connecting ring, and a second moving ring. The sealing ring seals the pump body, and the convex ring forms a fitting connection with the pump shell to improve the connection sealing performance between the sealing ring and the pump body.

[0041] In some examples, the above-mentioned second moving ring is fitted and connected to the left end face of the sealing ring, and a connecting ring is fixedly connected to the left end of the second moving ring. By the lateral movement of the installation assembly outside the adjusting assembly, the sealing ring can be pressed tightly, thereby increasing the sealing performance of the sealing ring to the pump body.

[0042] In some examples, the vertical cross-section of the above-mentioned connecting ring is trapezoidal, and a first moving ring is fixedly connected to the left end of the connecting ring. By the inclined arrangement of the outer surface of the connecting ring, the radial movement of the limiting assembly can be converted into the lateral movement of the installation assembly. Embodiment 1:

[0043] Based on the above concept, as Figures 1-4 shown, in the specific application scenario of a shaft seal structure for a slurry pump provided by the present utility model, as Figure 1 shown, the shaft seal structure for a slurry pump includes a pump body 1 and a main shaft 3 arranged inside the pump body 1. Among them,

[0044] As Figure 1 and Figure 2 shown, the left end face of the pump body 1 is fixedly installed with an end cover 2 through a bolt structure, and the pump body 1 includes a pump shell 101 and a connecting groove 102. An adjusting assembly 7 is connected through the inside of the end cover 2, and the adjusting assembly 7 includes an adjusting block 701, a connecting rod 702, and a connecting block 703. A limiting assembly 8 is connected to one end of the adjusting assembly 7 close to the main shaft 3, and the limiting assembly 8 is composed of a connecting block 801, a pressing rod 802, and a pressing block 803;

[0045] As Figure 1 , Figure 3and Figure 4 As shown in Figure 4 , the main shaft 3 is rotatably arranged inside the pump body 1, and an adjusting assembly 7 is sleeved and connected to the outer surface of the main shaft 3. A sealing ring 4 is connected to the outside of the adjusting assembly 7, and a convex ring 5 is fixedly connected to the right end face of the sealing ring 4. An installation assembly 6 is arranged on the left side of the sealing ring 4, and the installation assembly 6 includes a first moving ring 601, a connecting ring 602, and a second moving ring 603.

[0046] In a specific application scenario, such as Figure 1 and Figure 3 As shown in Figure 1 and Figure 3 , a connecting groove 102 is formed in the left end face of the pump housing 101, and the convex ring 5 is arranged in a one-to-one correspondence with the connecting groove 102 left and right. Moreover, the convex ring 5 and the pump housing 101 are fitted and connected through the connecting groove 102.

[0047] In a specific application scenario, such as Figure 3 and Figure 4 As shown in Figure 3 and Figure 4 , the second moving ring 603 is in fitting connection with the left end face of the sealing ring 4, and a connecting ring 602 is fixedly connected to the left end of the second moving ring 603.

[0048] In a specific application scenario, such as Figure 1 and Figure 4 As shown in Figure 1 and Figure 4 , the vertical cross-section of the connecting ring 602 is trapezoidally arranged, and a first moving ring 601 is fixedly connected to the left end of the connecting ring 602.

[0049] In a specific application scenario, such as Figure 1 and Figure 2 As shown in Figure 1 and Figure 2 , the connecting rod 702 is threadedly connected to the inside of the end cover 2, and an adjusting block 701 is fixedly connected to one end of the adjusting block 701 away from the central axis of the main shaft 3. Moreover, a connecting block 703 is fixedly connected to one end of the adjusting block 701 close to the central axis of the main shaft 3.

[0050] In a specific application scenario, such as Figure 1 and Figure 2 As shown in Figure 1 and Figure 2 , a connecting block 801 is rotatably connected to the outside of the connecting block 703. Moreover, a pressing rod 802 is fixedly connected to one end of the connecting block 801 close to the central axis of the main shaft 3. Both the connecting block 801 and the pressing rod 802 are slidably connected to the inside of the end cover 2.

[0051] In a specific application scenario, such as Figure 1 and Figure 2 As shown in Figure 1 and Figure 2 , a pressing block 803 is fixedly connected to one end of the pressing rod 802 close to the central axis of the main shaft 3, and the pressing block 803 is in fitting connection with the outer surface of the connecting ring 602.

[0052] In a specific application scenario, such as Figure 1 As shown in Figure 1 , both the adjusting assembly 7 and the limiting assembly 8 are symmetrically arranged up and down with respect to the central axis of the main shaft 3.

[0053] Those skilled in the art can understand that the attached drawings are only schematic diagrams of a preferred implementation scenario, and the modules or processes in the attached drawings are not necessarily essential for implementing the new type.

[0054] Those skilled in the art can understand that the modules in the shaft seal structure in the implementation scenario can be distributed in the shaft seal structure of the implementation scenario according to the description of the implementation scenario, or can be correspondingly changed and located in one or more shaft seal structures different from this implementation scenario. The modules in the above implementation scenario can be combined into one module, or further split into multiple sub-modules.

[0055] The specific implementation scenarios of the new type disclosed above are only for reference. However, the new type is not limited to this, and any changes that can be conceived by those skilled in the art should fall within the protection scope of the new type.

Claims

1. A shaft sealing structure for a slurry pump, the shaft sealing structure for a slurry pump comprising a pump body (1), and a main shaft (3) arranged inside the pump body (1), characterized in that: The left end surface of the pump body (1) is fixedly mounted with an end cover (2) by means of a bolt structure, and the pump body (1) comprises a pump housing (101) and a connecting groove (102), an adjustment component (7) is connected through the interior of the end cover (2), and the adjustment component (7) comprises an adjustment block (701), a connecting rod (702) and a connecting block (703), and an end of the adjustment component (7) close to the main shaft (3) is connected to a limit assembly (8), and the limit assembly (8) is composed of a connecting block (801), a pressure rod (802) and a pressure block (803); The main shaft (3) is rotatably arranged on the inner side of the pump body (1), and the outer surface of the main shaft (3) is sleeved and connected with an adjustment component (7), the outer side of the adjustment component (7) is connected with a sealing ring (4), and the right end surface of the sealing ring (4) is fixedly connected with a convex ring (5), and the left side of the sealing ring (4) is provided with a mounting component (6), and the mounting component (6) comprises a first movable ring (601), a connecting ring (602) and a second movable ring (603).

2. A shaft sealing structure for a slurry pump according to claim 1, characterized in that: The left end surface of the pump housing (101) is provided with a connecting groove (102), and the convex ring (5) and the connecting groove (102) are arranged in a one-to-one correspondence on the left and right, and the convex ring (5) is engaged with the pump housing (101) through the connecting groove (102).

3. A shaft sealing structure for a slurry pump according to claim 1, characterized in that: The second movable ring (603) is closely connected to the left end surface of the sealing ring (4), and the left end of the second movable ring (603) is fixedly connected to the connecting ring (602).

4. A shaft sealing structure for a slurry pump according to claim 3, characterized in that: The vertical cross-section of the connecting ring (602) is arranged in a trapezoidal shape, and the left end of the connecting ring (602) is fixedly connected to the first movable ring (601).

5. A shaft sealing structure for a slurry pump according to claim 1, characterized in that: The connecting rod (702) is threadedly connected to the inside of the end cover (2), and the end of the adjusting block (701) away from the central axis of the main shaft (3) is fixedly connected to the adjusting block (701), and the end of the adjusting block (701) close to the central axis of the main shaft (3) is fixedly connected to the connecting block (703).

6. A shaft sealing structure for a slurry pump according to claim 5, characterized in that: The outer side of the connection block (703) is rotatably connected to a connecting block (801), and one end of the connecting block (801) close to the central axis of the main shaft (3) is fixedly connected to a pressure rod (802), and the connecting block (801) and the pressure rod (802) are both slidably connected to the inside of the end cover (2).

7. A shaft sealing structure for a slurry pump according to claim 6, characterized in that: A pressing block (803) is fixedly connected to one end of the pressing rod (802) close to the central axis of the main shaft (3), and the pressing block (803) is closely connected to the outer surface of the connecting ring (602).

8. A shaft sealing structure for a slurry pump according to claim 1, characterized in that: The adjustment component (7) and the limit component (8) are both arranged vertically and symmetrically about the central axis of the main shaft (3).

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