Oil inlet sealing structure of forward and reverse blowing fan motor

Abstract

The utility model discloses an oil inlet sealing structure of a forward and reverse blowing fan motor, which comprises fan blades and a hub assembly, the hub assembly comprises a piston cover body, a high-pressure oil seal, a hydraulic cylinder body and a rotary oil inlet component, a lip seal is arranged between the cylinder body and a shaft sleeve, and a through hole communicated with the cylinder body is arranged at the bottom of the shaft sleeve. The device further comprises an oil inlet shaft, a bearing, a mounting cylinder, a sealing valve seat, a compensation spring, a valve seat sealing ring and a cylinder sealing ring. The installation cylinder is fixed in a shaft hole of the shaft sleeve, the cylinder sealing ring is installed between the installation cylinder and the shaft hole, the installation cylinder penetrates through the two ends of the installation cylinder through a first hole and a second hole, and a spring step is arranged at the bottom of the second hole. The oil inlet shaft is rotationally connected with the first hole of the installation cylinder through a bearing, and a sealing groove used for installing the valve seat sealing ring is formed in the sealing shaft. Sealing performance is obviously improved, and hydraulic oil leakage is prevented; meanwhile, the structure is simplified, the number of accessories is reduced, assembly complexity and production cost are reduced, and forward and reverse blowing operation stability and economic benefits are improved.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic sealing technology, specifically to an oil inlet sealing structure for a forward and reverse blowing fan motor. Background Technology

[0002] During the operation of a forward / reverse blower fan, the oil inlet seal plays a crucial role, and its performance directly affects the fan's lifespan and operational stability. A good oil inlet seal effectively prevents hydraulic oil leakage, avoiding malfunctions in the forward / reverse blower function, poor heat dissipation, and engine overheating due to hydraulic oil loss.

[0003] Currently, in the oil inlet sealing structure of forward and reverse blowing fans, the seal between the sealing shaft and the hole mostly uses a spring to press the sealing ring against the end of the sealing shaft. However, this sealing method has obvious drawbacks. In actual use, it is difficult to guarantee a reliable seal between the sealing shaft and the hole, which can easily lead to hydraulic oil leakage, thus affecting the performance and service life of the forward and reverse blowing fan. In addition, this sealing method requires many components, which not only increases the complexity of assembly but also leads to high production costs, hindering the product's promotion and application in the market. Therefore, it is necessary to develop a new oil inlet sealing structure to solve the problems of poor sealing effect and high cost in the existing technology. Utility Model Content

[0004] To address the shortcomings in the prior art, this utility model provides an oil inlet sealing structure for a forward and reverse blowing fan motor.

[0005] The technical solution adopted by this utility model is: an oil inlet sealing structure for a forward and reverse blowing fan motor, including fan blades and a hub assembly, the hub assembly including a piston cover, a high-pressure oil seal, a hydraulic cylinder, and a rotating oil inlet component;

[0006] The mounting cylinder is fixed inside the shaft hole of the bushing. The aforementioned cylinder sealing ring is installed between the mounting cylinder and the shaft hole. The interior of the mounting cylinder is penetrated through two holes, and a spring step is provided at the bottom of the second hole.

[0007] The oil inlet shaft is rotatably connected to the mounting cylinder via a bearing;

[0008] The sealing valve seat is fixed to the bottom wall of hole one by a fixing pin, and the sealing shaft of the sealing valve seat extends into hole two. The sealing shaft is provided with a sealing groove for installing the valve seat sealing ring.

[0009] The compensation spring is installed inside the second hole, with one end of the compensation spring abutting against the spring step and the other end abutting against the end of the sealing shaft.

[0010] Furthermore, the oil inlet shaft is provided with an oil inlet channel one, and the sealing valve seat is provided with an oil inlet channel two that communicates with the oil inlet channel one, and the oil inlet channel two communicates with the through hole.

[0011] Furthermore, a first retaining ring groove for a retaining ring for a mounting hole is provided in the hole of the mounting cylinder, and a bearing step is provided on the inner wall of the shaft hole below the first retaining ring groove. The bearing is installed between the bearing step and the retaining ring for the hole, and there are two bearings.

[0012] Furthermore, a retaining ring is fixed on the oil inlet shaft below the bearing.

[0013] Furthermore, the two ends of the hole are provided with guide slopes.

[0014] Furthermore, a second retaining ring groove is provided on the shaft hole, and an upper retaining ring is installed in the second retaining ring groove. A limiting step is provided below the shaft hole, and the mounting cylinder is limited and installed between the upper retaining ring and the limiting step.

[0015] The beneficial effects of this utility model are:

[0016] Firstly, in terms of sealing performance, the lip seal placed between the cylinder block and the bushing forms the first line of defense, effectively preventing lubricating oil from leaking from the gap between the cylinder block and the bushing. At the same time, the sealing valve seat is fixed by a fixing pin, and the sealing groove on the sealing shaft, together with the valve seat sealing ring and the compensation spring, can automatically adjust the sealing force according to pressure changes, making the seal between the sealing shaft and the second hole more reliable. This greatly reduces the risk of hydraulic oil leakage and avoids the failure of the forward and reverse blowing function, poor heat dissipation, and high temperature failure of the engine due to hydraulic oil loss.

[0017] Secondly, in terms of structural design, this patent reduces unnecessary accessories and simplifies the overall structure compared to existing technologies by rationally arranging components such as the mounting cylinder, oil inlet shaft, and bearings. The mounting cylinder and the shaft hole of the bushing are sealed by a cylinder sealing ring, resulting in a compact structure and convenient installation, reducing assembly complexity and improving production efficiency.

[0018] Finally, from a cost perspective, the simplified structure and reduced number of parts not only lower the cost of raw material procurement but also reduce labor costs during assembly, making the product more price-competitive in the market and creating greater economic benefits for the company.

[0019] In addition to the objectives, features and advantages described above, this utility model has other objectives, features and advantages.

[0020] The present invention will now be described in further detail with reference to the accompanying drawings. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of this utility model.

[0022] Figure 2 This is a cross-sectional schematic diagram of the present invention.

[0023] Figure 3 This is a schematic diagram of the mounting cylinder.

[0024] Figure 4 This is a schematic diagram of the upper cover.

[0025] Figure 5 This is a structural schematic diagram of the top cover from another perspective. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0028] This utility model provides an oil inlet sealing structure for a forward and reverse blowing fan motor.

[0029] In this embodiment, refer to Figure 1-5 The oil inlet sealing structure of the forward and reverse blowing fan includes a reversing hub 1 and a fan blade 2 driven by the reversing hub 1. The reversing hub 1 includes a rotor 3, an upper cover 4 and a lower cover 5. A bushing 6 is provided on the upper cover. A cylinder 7 is fitted on the bushing 6. A lip seal 9 is provided between the cylinder 7 and the bushing. A through hole 10 communicating with the cylinder is provided at the bottom of the bushing. The fan also includes an oil inlet shaft 11, a bearing 12, a mounting cylinder 13, a sealing valve seat 14, a compensating spring 15, a valve seat sealing ring 16 and a cylinder sealing ring 17.

[0030] The mounting cylinder is fixed inside the shaft hole 18 of the bushing. The aforementioned cylinder sealing ring is installed between the mounting cylinder and the shaft hole 18. The interior of the mounting cylinder is penetrated through the two ends of the mounting cylinder via hole 19 and hole 20. A spring step 21 is provided at the bottom of hole 20.

[0031] The oil inlet shaft is rotatably connected to the mounting cylinder via a bearing;

[0032] The sealing valve seat is fixed to the bottom wall of hole one by fixing pin 22, and the sealing shaft 23 of the sealing valve seat extends into hole two. The sealing shaft 23 is provided with a sealing groove 24 for installing the valve seat sealing ring.

[0033] The compensation spring is installed inside the second hole, with one end of the compensation spring abutting against the spring step and the other end abutting against the end of the sealing shaft.

[0034] In the above technical solution, the mounting cylinder is fixed inside the shaft hole of the bushing, and the cylinder sealing ring achieves a seal between the two, ensuring that the lubricating oil will not leak from the gap between the mounting cylinder and the shaft hole; the oil inlet shaft is rotatably connected to the first hole of the mounting cylinder through the bearing, so that the oil inlet shaft can rotate flexibly; the sealing valve seat is fixed to the bottom wall of the first hole, and its sealing shaft extends into the second hole. In conjunction with the valve seat sealing ring, under the elastic action of the compensation spring, the sealing force can be automatically adjusted according to the internal pressure change to achieve a reliable seal.

[0035] A complete and well-coordinated oil inlet sealing system has been formed, with a compact and reasonable structure. Compared with existing technologies, unnecessary parts have been reduced, simplifying the assembly process; the multi-component collaborative sealing greatly improves the sealing effect, effectively prevents lubricating oil leakage, ensures stable motor operation, and reduces maintenance costs.

[0036] Specifically, the oil inlet shaft is provided with an oil inlet channel 25, and the sealing valve seat is provided with an oil inlet channel 26 that communicates with the oil inlet channel 25. The oil inlet channel 26 communicates with the through hole.

[0037] In this embodiment, the first oil inlet channel on the oil inlet shaft, the second oil inlet channel on the sealing valve seat, and the through hole at the bottom of the bushing are connected in sequence to form a channel for lubricating oil to enter.

[0038] Specifically, the mounting cylinder has a first retaining ring groove 27 for a mounting hole retaining ring 34 inside the hole, and a bearing step 28 is provided on the inner wall of the shaft hole below the first retaining ring groove 27. The bearing is installed between the bearing step and the retaining ring, and there are two bearings.

[0039] In this embodiment, the first retaining ring groove is used to install a retaining ring for the bore, which mates with the bearing step to install two bearings between them. The retaining ring for the bore prevents the bearing from moving axially, while the bearing step provides mounting positioning and support for the bearing. The two bearings work together to better withstand the radial and axial loads when the oil inlet shaft rotates.

[0040] Specifically, a shaft retaining ring 29 is also fixed on the oil inlet shaft below the bearing.

[0041] In this embodiment, a retaining ring is fixed on the oil inlet shaft below the bearing to further restrict the axial movement of the oil inlet shaft, prevent the oil inlet shaft from being displaced due to axial force during rotation, and ensure the relative position of the oil inlet shaft and other components is stable.

[0042] Specifically, the two ends of the hole are provided with guide slopes 30.

[0043] In this embodiment, an inlet ramp is provided at the end of the second hole. When the lubricating oil enters the second hole, the inlet ramp can guide the sealing shaft to be inserted, which facilitates the assembly of the sealing shaft.

[0044] Specifically, a second retaining ring groove 31 is provided on the shaft hole, an upper retaining ring 32 is installed in the second retaining ring groove 31, a limiting step 33 is provided below the shaft hole, and the mounting cylinder is limited and installed between the upper retaining ring and the limiting step.

[0045] In this embodiment, an upper retaining ring is installed in the second retaining ring groove on the shaft hole, which cooperates with the limiting step to limit the installation of the mounting cylinder between the two. The upper retaining ring prevents the mounting cylinder from moving upward, while the limiting step restricts the mounting cylinder from moving downward, thereby achieving precise positioning and stable installation of the mounting cylinder within the shaft hole.

[0046] Please note to all technical personnel: Although this utility model has been described according to the specific embodiments above, the concept of this utility model is not limited to this utility model. Any modification that utilizes the concept of this utility model will be included within the scope of protection of this patent right.

Claims

1. An oil inlet sealing structure for a forward and reverse blowing fan motor, comprising fan blades and a hub assembly, the hub assembly comprising a piston cover, a high-pressure oil seal, a hydraulic cylinder, and a rotary oil inlet assembly, wherein a lip seal is provided between the cylinder and a bushing, and a through hole communicating with the cylinder is provided at the bottom of the bushing, characterized in that: It also includes an oil inlet shaft, bearings, mounting cylinder, sealing valve seat, compensating spring, valve seat seal ring, and cylinder seal ring; The mounting cylinder is fixed inside the shaft hole of the bushing. The aforementioned cylinder sealing ring is installed between the mounting cylinder and the shaft hole. The interior of the mounting cylinder is penetrated through two holes, and a spring step is provided at the bottom of the second hole. The oil inlet shaft is rotatably connected to the mounting cylinder via a bearing; The sealing valve seat is fixed to the bottom wall of hole one by a fixing pin, and the sealing shaft of the sealing valve seat extends into hole two. The sealing shaft is provided with a sealing groove for installing the valve seat sealing ring. The compensation spring is installed inside the second hole, with one end of the compensation spring abutting against the spring step and the other end abutting against the end of the sealing shaft.

2. The oil inlet sealing structure of the forward and reverse blowing fan motor according to claim 1, characterized in that: The oil inlet shaft is provided with an oil inlet channel one, and the sealing valve seat is provided with an oil inlet channel two that communicates with the oil inlet channel one. The oil inlet channel two communicates with the through hole.

3. The oil inlet sealing structure of the forward and reverse blowing fan motor according to claim 1, characterized in that: The mounting cylinder has a first retaining ring groove for a mounting hole retaining ring inside the hole. A bearing step is provided on the inner wall of the shaft hole below the first retaining ring groove. The bearing is installed between the bearing step and the retaining ring for the hole, and there are two bearings.

4. The oil inlet sealing structure of the forward and reverse blowing fan motor according to claim 3, characterized in that: A retaining ring is also fixed on the oil inlet shaft below the bearing.

5. The oil inlet sealing structure of the forward and reverse blowing fan motor according to claim 1, characterized in that: The two ends of the hole are provided with guide slopes.

6. The oil inlet sealing structure of the forward and reverse blowing fan motor according to claim 1, characterized in that: A second retaining ring groove is provided on the shaft hole, and an upper retaining ring is installed in the second retaining ring groove. A limiting step is provided below the shaft hole, and the mounting cylinder is limited and installed between the upper retaining ring and the limiting step.

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