Quick-release input shaft seal assembly for a new type of plunger pump

Abstract

The utility model relates to plunger pump technical field discloses a quick detach type input shaft oil seal assembly of novel plunger pump, including transmission shaft, one end of transmission shaft is installed with transmission shaft shield, the other end of transmission shaft is installed with input flange, the other end of input flange is installed with the connecting flat key, the outer wall of connecting flat key is installed with input oil seal seat body, the inner wall sliding connection of input oil seal seat body has a plurality of split type oil seal, the inner wall sliding connection of input oil seal seat body has the spacer ring, the inner wall screw thread connection of input oil seal seat body has the screw thread gland, the outer wall of connecting flat key is provided with lubricating assembly. In the utility model, by adopting split type oil seal structure, forms a set of quick detach type input shaft oil seal assembly device, realizes the quick and convenient replacement oil seal on the spot, greatly simplifies the operation process, reduces the operation labor intensity, avoids the environmental pollution, improves oil seal service life simultaneously, reduces the replacement frequency.

Description

Technical Field

[0001] This utility model relates to the field of plunger pump technology, and in particular to a novel quick-release input shaft oil seal assembly for a plunger pump. Background Technology

[0002] With the deepening development of oilfields both domestically and internationally, plunger pumps play a crucial role in various stages, including drilling, pressure testing, repair, and maintenance. The input shaft, as a core component of the plunger pump, directly bears the high-speed rotational power input to the pump's power end, reaching a maximum speed of 2100 rpm. An oil seal is installed on the input shaft to isolate the lubricating grease inside the power end from the external environment. Due to the long-term high-speed operation of the plunger pump, the linear velocity experienced by the oil seal on the input shaft reaches as high as 11 m / s, causing oil leakage due to wear of the oil seal lip. The oil seal becomes a consumable sealing component, requiring frequent disassembly and replacement. The input shaft oil seal seat is a component used in conjunction with the input shaft oil seal. It is required to have a simple structure, be lightweight, and facilitate the disassembly, assembly, and maintenance of the oil seal.

[0003] Currently, the oil seal assembly of the input shaft of plunger pumps, both domestically and internationally, generally adopts a structure of one or two integral oil seals + integral oil seal seat. If lubricating oil leakage occurs due to oil seal damage during on-site construction, the machine must be stopped and the drive shaft and input shaft flange must be disassembled to replace the new input shaft oil seal. The shutdown not only delays the normal construction progress of the equipment, but also results in a huge workload and labor intensity for operators to disassemble the drive shaft and input shaft flange, which weigh hundreds of kilograms. At the same time, during disassembly, lubricating oil will flow along the outer end face of the oil seal seat to the outside of the plunger pump, causing the subframe and chassis to be covered with oil. In addition, the on-site operation environment in China is harsh, with strong winds and sand. Once the sand and soil are adsorbed on the oil of the whole vehicle, they are not only difficult to remove, but also seriously affect the overall appearance and cause environmental pollution, which is time-consuming and laborious. Utility Model Content

[0004] To overcome the above shortcomings, this utility model provides a new type of quick-release input shaft oil seal assembly for a plunger pump, which aims to improve the problem that traditional input shaft oil seal assemblies need to be replaced when they leak oil, and are not easy to replace.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a novel quick-release input shaft oil seal assembly for a plunger pump, comprising a drive shaft, a drive shaft guard mounted on one end of the drive shaft, an input flange mounted on the other end of the drive shaft, a connecting key mounted on the other end of the input flange, an input oil seal seat body mounted on the outer wall of the connecting key, a plurality of split-type oil seals slidably connected to the inner wall of the input oil seal seat body, a spacer slidably connected to the inner wall of the input oil seal seat body, a threaded cap threadedly connected to the inner wall of the input oil seal seat body, and a lubrication assembly provided on the outer wall of the connecting key.

[0006] The above technical solution involves installing the input oil seal seat body at the other end of the connecting key, moving the split oil seal to the inner wall of the input oil seal seat body and the outer wall of the connecting key, then moving the spacer to the inner wall of the input oil seal seat body so that it contacts the outer wall of the split oil seal, then making another split oil seal contact the other end of the spacer's outer wall, and then rotating the threaded cap so that its other end's outer wall is threadedly connected to the other end's inner wall of the input oil seal seat body. This allows the threaded cap to fix the inner wall spacer and split oil seal of the input oil seal seat body, achieving the effect of convenient oil seal replacement.

[0007] Preferably, the lubrication assembly includes an oblique groove hole, which is formed on the outer wall of the input oil seal seat body, and the bottom end of the spacer ring has a 20mm wide notch.

[0008] Preferably, the notch of the spacer ring is positioned facing the oblique groove hole of the input oil seal seat body.

[0009] Preferably, the spacer is slidably connected to the outer wall between the two split oil seals, and the two split oil seals are slidably connected to the outer wall of the connecting key.

[0010] Preferably, the threaded gland is slidably connected to the outer wall of one of the split oil seals.

[0011] Preferably, the outer circumference of the threaded cap has multiple grooves.

[0012] Preferably, an input shaft oil seal seat is installed on the outer wall of the connecting key, and an input shaft oil seal is installed on the inner wall of the input shaft oil seal seat.

[0013] This utility model has the following beneficial effects:

[0014] 1. In this utility model, by adopting a split oil seal structure and through structural design innovation, a quick-release input shaft oil seal assembly device is formed, which realizes quick and convenient replacement of oil seals on site, greatly simplifies the operation process, reduces the labor intensity of operation, avoids environmental pollution, and at the same time improves the service life of oil seals and reduces the frequency of replacement.

[0015] 2. In this utility model, the movable threaded cap and the inclined guide oil groove set outside the oil seal reduce the manufacturing and maintenance costs of the equipment while ensuring the sealing effect. Attached Figure Description

[0016] Figure 1 This is a front view of a traditional input oil seal assembly.

[0017] Figure 2 for Figure 1 A magnified view of a section at point A in the middle;

[0018] Figure 3This is a front view of a quick-release input shaft oil seal assembly for a novel plunger pump proposed in this utility model;

[0019] Figure 4 An exploded view of a quick-release input shaft oil seal assembly for a novel plunger pump proposed in this utility model;

[0020] Figure 5 This is a schematic diagram of a split-type oil seal for a novel quick-release input shaft oil seal assembly of a plunger pump proposed in this utility model.

[0021] Legend:

[0022] 1. Drive shaft cover; 2. Drive shaft; 3. Input flange; 4. Input shaft oil seal seat; 5. Connecting key; 6. Input shaft oil seal; 7. Input oil seal seat body; 8. Spacer ring; 9. Split-type oil seal; 10. Threaded gland. Detailed Implementation

[0023] The technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0024] Reference Figure 1 and Figures 3-5 This utility model provides an embodiment of a novel quick-release input shaft oil seal assembly for a plunger pump, comprising a drive shaft 2, a drive shaft cover 1 mounted on one end of the drive shaft 2, an input flange 3 mounted on the other end of the drive shaft 2, a connecting key 5 mounted on the other end of the input flange 3, an input oil seal seat body 7 mounted on the outer wall of the connecting key 5, a plurality of split oil seals 9 slidably connected to the inner wall of the input oil seal seat body 7, a spacer 8 slidably connected to the inner wall of the input oil seal seat body 7, a threaded cap 10 threadedly connected to the inner wall of the input oil seal seat body 7, a lubrication assembly provided on the outer wall of the connecting key 5, a spacer 8 slidably connected to the outer wall between two split oil seals 9, two split oil seals 9 slidably connected to the outer wall of the connecting key 5, and a threaded cap 10 slidably connected to the outer wall of one of the split oil seals 9.

[0025] Specifically, the inner walls of the two split oil seals 9 contact the outer wall of the connecting key 5, and their outer walls contact the inner wall of the input oil seal seat body 7. At the same time, the spacer 8 is sandwiched between the two split oil seals 9, so that the spacer 8 and the two split oil seals 9 are fixed to the inner wall of the input oil seal seat body 7 by the threaded cap 10, so that the inner walls of the two input oil seal seat bodies 7 are tightly attached to the outer wall of the connecting key 5, thereby achieving the effect of convenient oil seal sealing.

[0026] Reference Figure 3 and Figure 4 The lubrication component includes an oblique groove hole, which is opened on the outer wall of the input oil seal seat body 7. The bottom end of the spacer ring 8 has a 20mm wide notch, and the notch of the spacer ring 8 faces the oblique groove hole of the input oil seal seat body 7.

[0027] Specifically, one end of the inclined groove hole of the input oil seal seat body 7 leads to the inner cavity of the oil seal seat, and the other end leads to the notch of the inner spacer 8 of the input oil seal seat body 7, so that the lubricating oil in the input oil seal seat body 7 can flow back to the power end of the plunger pump through the notch of the spacer 8 and the inclined groove hole of the input oil seal seat body 7, thereby reducing the loss of lubricating oil.

[0028] Reference Figure 3 and Figure 4 The threaded cap 10 has multiple grooves on its outer circumference.

[0029] Specifically, by providing multiple grooves on the outer circumference of the threaded gland 10, maintenance personnel can use tools such as screwdrivers to rotate the threaded gland 10 through the grooves, thereby facilitating the threaded gland 10 to press the split oil seal 9 inward or to detach from the input oil seal seat body 7 outward.

[0030] Reference Figure 1 and Figure 2 An input shaft oil seal seat 4 is installed on the outer wall of the connecting key 5, and an input shaft oil seal 6 is installed on the inner wall of the input shaft oil seal seat 4.

[0031] Specifically, the existing traditional input shaft oil seal is disassembled by using a pump tool to remove the input flange 3 and the connecting key 5. The four external hex bolts on the input shaft oil seal seat 4 are removed using a hex wrench, and the input shaft oil seal seat 4 assembly is removed. The input shaft oil seal 6 inside the input shaft oil seal seat 4 is knocked out, the inner surface of the input shaft oil seal seat 4 is cleaned, and the new input shaft oil seal is gently knocked into the input shaft oil seal seat 4 using a special tool. The four external hex bolts of the input shaft oil seal seat are then reinstalled. The connecting key 5, input flange 3, drive shaft 2, and drive shaft cover 1 are then installed in sequence to seal the oil seal.

[0032] Working principle: Through optimized structural design, a 10mm, 5° angled groove is provided on the input oil seal seat body 7. One end of the angled hole leads to the inner cavity of the oil seal seat, and the other end leads to the notch mounting position of the spacer ring 8 in the inner hole of the oil seal seat. At the same time, the inner hole of the outer end face of the oil seal seat is provided with internal threads. The spacer ring 8 is provided with a 20mm wide notch and is installed between the two split oil seals 9, with the notch facing the angled groove of the input oil seal seat body 7. The threaded cover 10 is connected to the input oil seal seat body 7 through external threads. The outer circle of the 10 has multiple grooves. When lubricating oil leaks outward from the pinion shaft of the plunger pump through the first input shaft oil seal, the second input shaft oil seal can block the leaking lubricating oil and allow it to flow back to the power end of the plunger pump through the notch of the spacer ring 8 and the oblique groove hole of the input oil seal seat body 7. At the same time, the outer groove of the threaded cover 10 can be rotated with a screwdriver or other tools to press the split oil seal 9 inward, adjust the interference fit between the oil seal lip and the input shaft, achieve a re-sealing effect, extend the service life of the oil seal, and avoid the need to replace the oil seal once it leaks.

[0033] If the split oil seal 9 leaks a large amount of oil and needs to be replaced, you only need to remove the threaded cover 10. Since the split oil seal 9 has a separate port structure, you can simply use a screwdriver or other tools to pry open the oil seal and remove the entire damaged oil seal. Then, reinstall the new oil seal in the reverse order of disassembly. There is no need to disassemble the drive shaft and input flange according to the traditional steps, which is convenient, simple and efficient.

[0034] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A novel quick-release input shaft oil seal assembly for a plunger pump, comprising a drive shaft (2), characterized in that: One end of the drive shaft (2) is equipped with a drive shaft cover (1), the other end of the drive shaft (2) is equipped with an input flange (3), the other end of the input flange (3) is equipped with a connecting key (5), the outer wall of the connecting key (5) is equipped with an input oil seal seat body (7), the inner wall of the input oil seal seat body (7) is slidably connected with multiple split oil seals (9), the inner wall of the input oil seal seat body (7) is slidably connected with a spacer (8), the inner wall of the input oil seal seat body (7) is threadedly connected with a threaded cap (10), and the outer wall of the connecting key (5) is provided with a lubrication component.

2. The quick-release input shaft oil seal assembly of a novel plunger pump according to claim 1, characterized in that: The lubrication assembly includes an oblique groove hole, which is opened on the outer wall of the input oil seal body (7), and the bottom end of the spacer (8) has a 20mm wide notch.

3. The quick-release input shaft oil seal assembly of a novel plunger pump according to claim 2, characterized in that: The notch of the spacer ring (8) is positioned towards the oblique groove hole of the input oil seal seat body (7).

4. The quick-release input shaft oil seal assembly of a novel plunger pump according to claim 1, characterized in that: The spacer (8) is slidably connected to the outer wall between the two split oil seals (9), and the two split oil seals (9) are slidably connected to the outer wall of the connecting key (5).

5. The quick-release input shaft oil seal assembly of a novel plunger pump according to claim 1, characterized in that: The threaded cap (10) is slidably connected to the outer wall of one of the split oil seals (9).

6. The quick-release input shaft oil seal assembly of a novel plunger pump according to claim 1, characterized in that: The threaded cap (10) has multiple grooves on its outer circumference.

7. The quick-release input shaft oil seal assembly of a novel plunger pump according to claim 1, characterized in that: The outer wall of the connecting key (5) is fitted with an input shaft oil seal seat (4), and the inner wall of the input shaft oil seal seat (4) is fitted with an input shaft oil seal (6).

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