Hydraulic pump shaft sealing structure

Abstract

The utility model discloses a hydraulic pump shaft sealing structure, which relates to the technical field of pump shaft sealing, and comprises a pump shaft, a sealing assembly is arranged outside the pump shaft, an adjusting assembly is arranged on one side of the sealing assembly, the sealing assembly comprises a mounting seat, a limiting ring is arranged on one side of the mounting seat, a sealing filler is arranged outside the limiting ring, and the adjusting assembly is arranged on the other side of the sealing assembly. A sealing sleeve is arranged outside the sealing filler, a mounting ring is arranged at one end of the sealing sleeve, a supporting top plate is arranged at the other end of the sealing sleeve, and a positioning bolt is arranged outside the mounting ring. The sealing sleeve is clamped outside the sealing filler, the mounting ring and the sealing sleeve are positioned and connected through the positioning bolt and the limiting slide rail, so that the sealing filler is hermetically connected, the screw rod is driven to rotate by rotating the handle, and the adjusting plate is ejected by the ejector rod, so that the sealing filler can be conveniently and quickly adjusted. And the adjusting plate is used for positioning and extruding the sealing filler.

Description

Technical Field

[0001] This utility model relates to the field of pump shaft sealing technology, and in particular to a hydraulic pump shaft sealing structure. Background Technology

[0002] In the existing technology, most sealing bushings are cylindrical. In the packing structure, the packing is mainly fixed by the tightening of the packing gland. Tightening the packing gland can improve the dynamic sealing between the packing and the bushing and the static sealing between the packing and the inner wall of the stuffing box.

[0003] The pressure that the packing can withstand is not only affected by the pre-adjustment of the packing gland's tightness, but also changes as the pump shaft operates. However, conventional packings are all limiting components that are bolted to the fixing sleeve and packing ring on the outside of the pump shaft. During the operation of the pump shaft, the sealing strength cannot be adjusted in real time, which affects product quality. Utility Model Content

[0004] The main objective of this invention is to provide a hydraulic pump shaft sealing structure that can effectively solve the problems in the background art.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] A hydraulic pump shaft sealing structure includes a pump shaft, a sealing assembly is provided on the outside of the pump shaft, and an adjustment assembly is provided on one side of the sealing assembly.

[0007] The sealing assembly includes a mounting base, a limiting ring on one side of the mounting base, a sealing filler on the outside of the limiting ring, a sealing sleeve on the outside of the sealing filler, a mounting ring on one end of the sealing sleeve, a supporting top plate on the other end of the sealing sleeve, and a positioning bolt on the outside of the mounting ring.

[0008] The adjustment assembly includes a support sleeve, a helical rod is provided in the middle of the support sleeve, a rotating handle is provided at the top of the helical rod, an ejector rod is provided outside the helical rod, and an adjustment plate is provided at the bottom of the ejector rod.

[0009] Preferably, the mounting base is sleeved on the outside of the pump shaft, and the inner wall of the mounting base is tightly fitted with the outer wall of the pump shaft. A limiting ring is fixedly connected to one side of the mounting base, and the limiting ring is located on the side of the mounting base closer to the pump shaft. A sealing packing is installed on the outside of the limiting ring, and the sealing packing is inserted into the outside of the limiting ring.

[0010] Preferably, a sealing sleeve is fitted over the sealing packing, and one end of the sealing sleeve contacts the side of the mounting base near the limiting ring. A supporting top plate is fixedly connected to the end of the sealing sleeve away from the mounting base, and the supporting top plate is fitted over the outside of the pump shaft. An installation ring is fitted over the side of the sealing sleeve near the mounting base, and the installation ring is fixedly connected to the mounting base. The installation ring is located outside the limiting ring.

[0011] Preferably, the outer wall of the mounting ring is threaded with three positioning bolts, which are evenly distributed on the outer wall of the mounting ring. The positioning bolts pass through the mounting ring and are connected to the sealing sleeve. The sealing sleeve has a limiting groove on the side near the positioning bolt, and the positioning bolt is inserted into the limiting groove. The inner wall of the mounting ring has three limiting grooves, which are evenly distributed on the inner wall of the mounting ring. The limiting grooves are slidably connected to limiting rails, and the limiting rails are fixedly connected to the sealing sleeve. The limiting rails are located on the outer wall of the sealing sleeve.

[0012] Preferably, a support sleeve is bolted to the side of the support top plate away from the sealing sleeve, and there are three support sleeves, which are evenly distributed on the side of the support top plate away from the sealing sleeve. A helical rod is mounted on the end of the support sleeve away from the support top plate through a bearing, and the bottom end of the helical rod is connected to the bottom of the support sleeve.

[0013] Preferably, a rotating handle is engaged at the top of the spiral rod, and the rotating handle is located at the end of the support sleeve away from the support top plate. An ejector rod is sleeved on the outer wall of the spiral rod, and the bottom end of the ejector rod passes through the support top plate and connects to the inside of the sealing sleeve. An adjusting plate is bolted to the end of the ejector rod away from the spiral rod. The adjusting plate is slidably connected to the inside of the sealing sleeve, and the side of the adjusting plate away from the ejector rod is in contact with the sealing packing.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] In this invention, a sealing sleeve is attached to the outside of the sealing packing, and a positioning bolt and a limiting slide rail are used to position and connect the mounting ring and the sealing sleeve, thereby achieving a sealing connection of the sealing packing. At the same time, rotating the handle drives the screw rod to rotate, causing the ejector rod to eject the adjusting plate. The adjusting plate positions and compresses the sealing packing, thereby achieving positioning and pressurizing of the sealing packing. This also facilitates the adjustment of the sealing packing thickness and improves the practicality of the device. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the device of this utility model;

[0017] Figure 2This is a structural schematic diagram of the overall cross-section of the device of this utility model;

[0018] Figure 3 This is a schematic diagram of the sealing assembly of this utility model;

[0019] Figure 4 This is a schematic diagram of the structure of the adjustment component of this utility model.

[0020] In the diagram: 1. Pump shaft; 2. Sealing assembly; 3. Mounting base; 4. Limiting ring; 5. Sealing packing; 6. Mounting ring; 7. Sealing sleeve; 8. Support top plate; 9. Positioning bolt; 10. Limiting slide rail; 11. Limiting slide groove; 12. Limiting groove; 13. Adjusting assembly; 14. Support sleeve; 15. Rotary handle; 16. Helical rod; 17. Ejector rod; 18. Adjusting plate. Detailed Implementation

[0021] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0022] Please see Figure 1 , Figure 2 , Figure 3 As shown, a hydraulic pump shaft sealing structure includes a pump shaft 1, a sealing assembly 2 is provided on the outside of the pump shaft 1, and an adjusting assembly 13 is provided on one side of the sealing assembly 2.

[0023] The sealing assembly 2 includes a mounting base 3. A limiting ring 4 is provided on one side of the mounting base 3, and a sealing packing 5 is provided outside the limiting ring 4. A sealing sleeve 7 is provided outside the sealing packing 5. A mounting ring 6 is provided at one end of the sealing sleeve 7, and a supporting top plate 8 is provided at the other end of the sealing sleeve 7. A positioning bolt 9 is provided outside the mounting ring 6. The mounting base 3 is sleeved on the outside of the pump shaft 1, and the inner wall of the mounting base 3 is tightly fitted with the outer wall of the pump shaft 1. The limiting ring 4 is fixedly connected to one side of the mounting base 3, and the limiting ring 4 is located on the side of the mounting base 3 closer to the pump shaft 1. The sealing packing 5 is installed outside the limiting ring 4, and the sealing packing 5 is inserted into the outside of the limiting ring 4. The sealing sleeve 7 is sleeved outside the sealing packing 5, and one end of the sealing sleeve 7 contacts the side of the mounting base 3 closest to the limiting ring 4. A supporting top plate 8 is fixedly connected to the end of the sealing sleeve 7 away from the mounting base 3. Plate 8, and support top plate 8 are sleeved on the outside of pump shaft 1. The sealing sleeve 7 is sleeved on the side near the mounting base 3 with mounting ring 6, and mounting ring 6 is fixedly connected to mounting base 3. The mounting ring 6 is located outside of limiting ring 4. There are three positioning bolts 9 connected to the outer wall of the mounting ring 6 by threads. The positioning bolts 9 are evenly distributed on the outer wall of the mounting ring 6. The positioning bolts 9 pass through the mounting ring 6 and are connected to the sealing sleeve 7. A limiting groove 12 is opened on the side of the sealing sleeve 7 near the positioning bolts 9, and the positioning bolts 9 are inserted into the inside of the limiting groove 12. A limiting slide groove 11 is opened on the inner wall of the mounting ring 6, and there are three limiting slide grooves 11, which are evenly distributed on the inner wall of the mounting ring 6. A limiting slide rail 10 is slidably connected inside the limiting slide groove 11, and the limiting slide rail 10 is fixedly connected to the sealing sleeve 7. The limiting slide rail 10 is located on the outer wall of the sealing sleeve 7.

[0024] Please see Figure 1 , Figure 2 , Figure 3 , Figure 4As shown, the adjusting assembly 13 includes a support sleeve 14, a spiral rod 16 disposed in the middle of the support sleeve 14, a rotating handle 15 disposed at the top of the spiral rod 16, an ejector rod 17 disposed on the outside of the spiral rod 16, and an adjusting plate 18 disposed at the bottom of the ejector rod 17. The support sleeve 14 is bolted to the side of the support top plate 8 away from the sealing sleeve 7. There are three support sleeves 14, evenly distributed on the side of the support top plate 8 away from the sealing sleeve 7. The spiral rod 16 is mounted to the end of the support sleeve 14 away from the support top plate 8 via a bearing, and the bottom end of the spiral rod 16 is connected to the bottom of the support sleeve 14. The rotating handle 15 is engaged at the top of the spiral rod 16, and the rotating handle 15 is located at the end of the support sleeve 14 away from the support top plate 8. The ejector rod 17 is sleeved on the outer wall of the spiral rod 16, and the top... The bottom end of the ejector rod 17 passes through the supporting top plate 8 and connects to the inside of the sealing sleeve 7. An adjusting plate 18 is bolted to the end of the ejector rod 17 away from the screw rod 16. The adjusting plate 18 is slidably connected inside the sealing sleeve 7. The side of the adjusting plate 18 away from the ejector rod 17 contacts the sealing packing 5. It is snapped onto the outside of the sealing packing 5 by the sealing sleeve 7. The positioning bolt 9 and the limiting slide rail 10 are used to position the mounting ring 6 and the sealing sleeve 7, thereby achieving a sealing connection of the sealing packing 5. At the same time, rotating the handle 15 drives the screw rod 16 to rotate, causing the ejector rod 17 to eject the adjusting plate 18. The adjusting plate 18 positions and compresses the sealing packing 5, thereby achieving positioning and pressurizing of the sealing packing 5. It also facilitates the adjustment of the thickness of the sealing packing 5 and improves the practicality of the device.

[0025] It should be noted that this utility model is a hydraulic pump shaft sealing structure. In use, the mounting base 3 is fitted onto the outside of the pump shaft 1, and the sealing packing 5 is installed between the mounting base 3 and the sealing sleeve 7. The sealing sleeve 7 moves towards the mounting base 3, causing it to engage between the mounting ring 6 and the sealing packing 5. Simultaneously, the limiting slide rail 10 on the outer wall of the sealing sleeve 7 aligns with the limiting slide groove 11 on the inner wall of the mounting ring 6. The limiting slide rail 10 is slidably connected inside the limiting slide groove 11, thereby achieving a limiting connection between the sealing sleeve 7 and the mounting ring 6. Finally, the rotating positioning bolt 9 passes through the mounting ring 6 and connects to the limiting groove 12 on the outer wall of the sealing sleeve 7. Internally, this achieves the positioning connection between the mounting ring 6 and the sealing sleeve 7. Rotating the rotating handle 15 causes the rotating handle 15 to drive the spiral rod 16 to rotate, thereby causing the ejector rod 17 to move along the outer wall of the spiral rod 16. The ejector rod 17 drives the adjusting plate 18 to move away from the spiral rod 16. The ejector rod 17 and the adjusting plate 18 compress the sealing packing 5 inside the sealing sleeve 7, thereby achieving the compaction and positioning of the sealing packing 5. When the sealing packing 5 is worn out, rotating the rotating handle 15 and the spiral rod 16 again causes the ejector rod 17 to drive the adjusting plate 18 to compress the sealing packing 5, which facilitates the adjustment of the device.

[0026] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A hydraulic pump shaft sealing structure, comprising a pump shaft (1), characterized in that: A sealing assembly (2) is provided on the outside of the pump shaft (1), and an adjusting assembly (13) is provided on one side of the sealing assembly (2); The sealing assembly (2) includes a mounting base (3), a limiting ring (4) is provided on one side of the mounting base (3), and a sealing filler (5) is provided outside the limiting ring (4). A sealing sleeve (7) is provided outside the sealing filler (5). A mounting ring (6) is provided at one end of the sealing sleeve (7), and a supporting top plate (8) is provided at the other end of the sealing sleeve (7). A positioning bolt (9) is provided outside the mounting ring (6). The adjustment assembly (13) includes a support sleeve (14), a spiral rod (16) is provided in the middle of the support sleeve (14), and a rotating handle (15) is provided at the top of the spiral rod (16). An ejector rod (17) is provided outside the spiral rod (16), and an adjustment plate (18) is provided at the bottom of the ejector rod (17).

2. The hydraulic pump shaft seal structure according to claim 1, characterized in that: The mounting base (3) is sleeved on the outside of the pump shaft (1), and the inner wall of the mounting base (3) is tightly fitted with the outer wall of the pump shaft (1). A limiting ring (4) is fixedly connected to one side of the mounting base (3), and the limiting ring (4) is located on the side of the mounting base (3) close to the pump shaft (1). A sealing packing (5) is installed on the outside of the limiting ring (4), and the sealing packing (5) is inserted into the outside of the limiting ring (4).

3. The hydraulic pump shaft seal structure according to claim 2, characterized in that: The sealing packing (5) is fitted with a sealing sleeve (7), and one end of the sealing sleeve (7) is in contact with the side of the mounting base (3) near the limiting ring (4). The end of the sealing sleeve (7) away from the mounting base (3) is fixedly connected to a supporting top plate (8), and the supporting top plate (8) is fitted on the outside of the pump shaft (1). The side of the sealing sleeve (7) near the mounting base (3) is fitted with a mounting ring (6), and the mounting ring (6) is fixedly connected to the mounting base (3). The mounting ring (6) is located outside the limiting ring (4).

4. The hydraulic pump shaft seal structure according to claim 3, characterized in that: The outer wall of the mounting ring (6) is connected by a threaded positioning bolt (9), and there are three positioning bolts (9), which are evenly distributed on the outer wall of the mounting ring (6). The positioning bolts (9) pass through the mounting ring (6) and are connected to the sealing sleeve (7). The sealing sleeve (7) has a limiting groove (12) on the side near the positioning bolt (9), and the positioning bolt (9) is inserted into the limiting groove (12). The inner wall of the mounting ring (6) has a limiting slide groove (11), and there are three limiting slide grooves (11), which are evenly distributed on the inner wall of the mounting ring (6). The limiting slide groove (11) is slidably connected to a limiting slide rail (10), and the limiting slide rail (10) is fixedly connected to the sealing sleeve (7). The limiting slide rail (10) is located on the outer wall of the sealing sleeve (7).

5. A hydraulic pump shaft seal structure according to claim 1, characterized in that: The supporting top plate (8) is bolted to the side away from the sealing sleeve (7) with a supporting sleeve (14), and there are three supporting sleeves (14), which are evenly distributed on the side of the supporting top plate (8) away from the sealing sleeve (7). The end of the supporting sleeve (14) away from the supporting top plate (8) is fitted with a helical rod (16) through a bearing, and the bottom end of the helical rod (16) is connected to the bottom of the supporting sleeve (14).

6. The hydraulic pump shaft seal structure according to claim 5, characterized in that: The top of the spiral rod (16) is fitted with a rotating handle (15), and the rotating handle (15) is located at the end of the support sleeve (14) away from the support top plate (8). An ejector rod (17) is sleeved on the outer wall of the spiral rod (16), and the bottom end of the ejector rod (17) passes through the support top plate (8) and connects to the inside of the sealing sleeve (7). An adjusting plate (18) is installed on the end of the ejector rod (17) away from the spiral rod (16) by bolts. The adjusting plate (18) is slidably connected to the inside of the sealing sleeve (7). The side of the adjusting plate (18) away from the ejector rod (17) is in contact with the sealing filler (5).

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