Heater oil pump with high sealing performance
By using a limiting and loading structure design, the problem of insufficient connection strength between the heater and the oil pump was solved, achieving stable sealing and safe connection under high temperature and high pressure environments.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-13
- Publication Date
- 2026-03-20
AI Technical Summary
Traditional heater oil pumps have low connection strength with external oil supply equipment, and the connecting bolts are easily affected by external stress, causing them to shake or loosen, resulting in decreased sealing performance and safety hazards.
A high-sealing heater oil pump was designed, employing a limiting structure and a loading structure. The limiting structure applies a radial load when the connecting bolts are inserted, and the tension loading of the loading structure enhances the connection strength. Furthermore, the loading spring provides dynamic preload compensation, ensuring the stability and sealing of the connection.
It effectively limits the shaking and loosening of the connecting bolts, improves the sealing and mechanical reliability of the connection interface, and ensures safety and stability under high temperature and high pressure environments.
Smart Images
Figure CN224017347U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of heater oil pump technology, specifically a high-sealing heater oil pump. Background Technology
[0002] In the industrial production field, heater oil pumps are often used to transport oil with a certain temperature. The stability of their performance is crucial to the normal operation of the entire system. In practical applications, heater oil pumps need to be connected to external oil supply equipment to realize the input and output of oil. Currently, traditional heater oil pumps are usually connected to external oil supply equipment through flanges and connecting bolts. That is, the oil inlet end of the pump body is equipped with a connecting plate, and the output end of the external oil supply equipment is equipped with a flange. The two are detachably connected by several connecting bolts. However, this traditional connection method has obvious drawbacks: On the one hand, the connection strength between the connecting plate and the flange mainly depends on the preload of the connecting bolts. During long-term operation, due to factors such as vibration in the external environment and fluctuations in oil pressure, the connecting bolts are easily subjected to external stress, resulting in shaking or loosening. Once the connecting bolts loosen, it will not only lead to a decrease in the sealing between the pump body and the oil supply equipment, causing oil leakage and affecting the normal operation of the system, but may also cause safety accidents, bringing significant safety hazards. On the other hand, the traditional connection structure lacks effective limiting and loading structures, making it impossible to apply radial loads to the connecting bolts to limit their shaking, nor can it improve the connection strength between the connecting plate and the flange through reasonable loading methods, resulting in poor connection stability and difficulty in meeting the usage requirements under high-demand operating conditions. Utility Model Content
[0003] To address the shortcomings of existing technologies, this utility model provides a high-sealing heater oil pump, which solves the problem of low connection strength between traditional heater oil pumps and external oil supply equipment, and the fact that the connecting bolts are easily affected by external stress, resulting in shaking or loosening.
[0004] To achieve the above objectives, this utility model provides a high-sealing heater oil pump, including a pump body, one end of which is an oil inlet and the other end is an oil outlet. It also includes a flange for installation on the output end of an external oil supply device. A connecting plate is provided on the oil inlet for coaxial contact with the flange. Several connecting bolts are detachably connected between the connecting plate and the flange. A limiting structure is provided on the connecting plate to apply a radial load to the connecting bolts when they are inserted, thereby limiting bolt movement or loosening. A loading structure is also provided on the connecting plate to cooperate with the limiting structure, subjecting the limiting structure to tension loading to improve the connection strength between the connecting plate and the flange.
[0005] The advantages of adopting the above technical solution are as follows: The limiting structure can apply a radial load when the connecting bolts are inserted. By constraining the circumferential movement of the bolts, it effectively limits their tendency to wobble or loosen under external stresses such as vibration and pressure fluctuations. The radial constraint mechanism can control the bolt's degree of freedom within a very small range, avoiding failure of the flange and connecting plate contact surface due to bolt displacement, thus significantly improving the sealing performance of the connection interface. Furthermore, the combined design of the loading structure and the limiting structure, through the principle of tension loading, further strengthens the contact strength between the connecting plate and the flange. When the loading structure applies tension to the limiting structure, the preload between the connecting plate and the flange is dynamically maintained and enhanced. Even under long-term alternating load conditions, the contact surface can maintain stable contact pressure, avoiding connection failure due to preload attenuation. The dual-structure design in the above technology not only improves the reliability of the mechanical connection but also ensures the safety of the heater oil pump in high-temperature, high-pressure oil transportation environments by reducing leakage risks.
[0006] This utility model further comprises: a plurality of connecting holes circumferentially formed on the connecting plate, each of the connecting holes corresponding to a plurality of connecting bolts and threadedly engaged; a mating hole for the corresponding connecting bolt to pass through and be threadedly engaged on the flange corresponding to each connecting hole; a limiting groove on one side of each connecting hole on the connecting plate, each limiting groove communicating with its corresponding connecting hole; the limiting structure comprising a plurality of first connecting plates, each of the first connecting plates corresponding to a plurality of limiting grooves and each first connecting plate being disposed in its corresponding limiting groove; a limiting hole for coaxial alignment with the adjacent and corresponding connecting hole on the first connecting plate, the limiting hole being threadedly engaged with the connecting bolt.
[0007] The advantages of adopting the above technical solution are as follows: Each connecting hole in the above technology corresponds to a limiting groove and a first connecting plate. The coaxial fit between the limiting hole and the connecting bolt can form a uniform radial support force in the circumference of the bolt. Compared with the traditional connection method where the bolt directly passes through the open hole, this structure transforms the radial constraint of the bolt from single-point contact to surface contact, significantly increasing the contact area and effectively dispersing the shear force and bending moment on the bolt. At the same time, the connection design between the limiting groove and the connecting hole allows the first connecting plate to fit tightly against the bolt shank, forming a constraint simultaneously during the bolt screwing process, avoiding tilting or displacement of the bolt due to installation deviation or external vibration. In addition, the fit between the first connecting plate and the limiting groove allows for fine adjustment within a certain range to adapt to coaxiality errors during installation, thereby reducing assembly difficulty and improving connection accuracy. Through the above technical structural design, not only is the anti-loosening ability of the bolt connection enhanced, but also the radial displacement of the bolt is limited to ensure that the flange and the connecting plate always remain coaxially fitted, avoiding uneven stress distribution on the sealing surface caused by eccentricity, providing double protection for high sealing performance from the mechanical structure level.
[0008] The present invention further includes the following configuration: the limiting structure includes several second connecting plates, each of which corresponds to a certain limiting groove, and each second connecting plate is disposed in its corresponding limiting groove. Each second connecting plate is located on one side of its adjacent and corresponding first connecting plate. Each second connecting plate is provided with a locking hole. A locking bolt is threadedly connected to one side of each mating hole on the flange. Several locking bolts correspond to several locking holes and are threadedly connected. The diameter of the locking hole is smaller than the diameter of the limiting hole. The first connecting plate and the second connecting plate are slidably disposed in their respective limiting grooves, and the first connecting plate and the second connecting plate are mated by a loading structure.
[0009] The advantages of adopting the above technical solution are as follows: the sliding arrangement of the second connecting plate and the first connecting plate in the limiting groove, combined with the pulling action of the locking bolt on the second connecting plate, forms an active loading of the limiting structure. When the locking bolt is screwed into the mating hole of the flange and threadedly connected to the locking hole of the second connecting plate, the axial tension of the locking bolt is transmitted to the first connecting plate through the second connecting plate, causing the two to slide relative to each other in the limiting groove. At the same time, the design that the diameter of the locking hole is smaller than the diameter of the limiting hole allows the second connecting plate to form a directional tension on the first connecting plate when under force, ensuring that the limiting structure is always in a state of tension loading. The two-way constraint mechanism not only restricts the radial wobble of the connecting bolt, but also dynamically compensates for the connection loosening problem caused by vibration or temperature changes through the active pre-tightening effect of the locking bolt.
[0010] The present invention further includes a loading spring connected between the first connecting plate and the second connecting plate. One end of the loading spring is connected to the first connecting plate and the other end is connected to the second connecting plate. The loading spring is a square spring, and the loading spring is the loading structure.
[0011] The advantages of adopting the above technical solution are as follows: The design of using a loading spring as the loading structure provides a dynamic elastic preload compensation mechanism for the connection system. Compared with traditional cylindrical springs, the square spring structure has stronger torsional stiffness and stability, and can maintain a stable axial tension state within the limiting groove, avoiding loading failure caused by spring deformation. When the connecting bolt is subjected to external vibration or oil pressure fluctuations, the loading spring absorbs energy through elastic deformation, converting the dynamic load into the elastic potential energy of the spring, thereby reducing the alternating stress directly borne by the bolt and reducing the risk of fatigue fracture. At the same time, the two ends of the loading spring are connected to the first connecting plate and the second connecting plate respectively. Under the preload action of the locking bolt, the spring is stretched and stores elastic potential energy, continuously applying tension to the limiting structure, ensuring that the contact surface between the connecting plate and the flange always maintains a constant contact pressure.
[0012] The present invention further includes: a loading sleeve is fitted on the loading spring, and the two ends of the loading sleeve are respectively connected to the first connecting plate and the second connecting plate, and the loading sleeve is made of elastic material.
[0013] The advantages of adopting the above technical solution are as follows: The loading sleeve is made of elastic material, which can tightly fit the spring surface and effectively isolate the spring from the corrosion of external media such as oil and dust. It is especially suitable for heater pumps that transport high-temperature oil, avoiding spring failure due to media corrosion, thereby improving the durability of the entire loading structure. At the same time, the connection design between the two ends of the loading sleeve and the first and second connecting plates restricts the elastic deformation of the spring within the axial range of the loading sleeve, preventing radial bending or twisting of the spring during tensioning, ensuring that the tension is evenly transmitted along the bolt axis, and enhancing the stability of the loading structure. In addition, the elastic material of the loading sleeve can also absorb high-frequency vibration energy through its own deformation, assisting the spring in reducing the impact of vibration on the connection system, forming a double buffer mechanism.
[0014] The present invention further includes: anti-detachment grooves are provided on both sides of the limiting groove along the opening direction of the limiting groove; anti-detachment blocks extend from both sides of the first connecting plate and both sides of the second connecting plate toward the anti-detachment groove; and each anti-detachment block is slidably disposed in its corresponding anti-detachment groove.
[0015] The advantages of adopting the above technical solution are: the anti-detachment groove extends along the opening direction of the limiting groove and forms a mechanical limiting structure with the sliding cooperation of the anti-detachment block, ensuring that the first connecting plate and the second connecting plate can only slide axially in the limiting groove and will not detach radially. This effectively solves the problem of component detachment that may occur in traditional sliding structures under vibration or impact loads. Even under extreme working conditions, the connecting plate can maintain a normal movement trajectory in the limiting groove, avoiding connection failure or equipment failure caused by component detachment. Attached Figure Description
[0016] Figure 1 This is a three-dimensional view of the present invention;
[0017] Figure 2 This is a three-dimensional partial perspective view of the connecting disc in this utility model;
[0018] Figure 3 This is a three-dimensional partial perspective view of the combined state of the first connecting plate and the second connecting plate in this utility model;
[0019] Figure 4 This is a simplified cross-sectional view of the first and second connecting plates of this utility model, showing the engagement of the anti-detachment block and the limiting groove. Detailed Implementation
[0020] This utility model provides a high-sealing heater oil pump, including a pump body 1, one end of which is an oil inlet 11 and the other end is an oil outlet 12. It also includes a flange 2 for installation on the output end of an external oil supply device. A connecting plate 3 is provided on the oil inlet 11 for coaxial contact with the flange 2. A plurality of connecting bolts 21 are detachably connected between the connecting plate 3 and the flange 2. The connecting plate 3 is provided with a limiting structure for applying a radial load to the connecting bolts 21 when they are inserted, thus limiting the shaking or loosening of the connecting bolts 21. The connecting plate 3 is also provided with a loading structure that cooperates with the limiting structure to subject the limiting structure to tension loading, thereby improving the connection strength between the connecting plate 3 and the flange 2. The connecting plate 3 has a circumferential... The flange 2 has a plurality of connecting holes 31, each corresponding to a plurality of connecting bolts 21 and threadedly engaged. For each connecting hole 31, the flange 2 has a threaded mating hole 22 for the corresponding connecting bolt 21 to pass through. For each connecting hole 31, the connecting plate 3 has a limiting groove 32 on one side, each limiting groove 32 communicating with its corresponding connecting hole 31. The limiting structure includes a plurality of first connecting plates 4, each corresponding to a plurality of limiting grooves 32, and each first connecting plate 4 is disposed in its corresponding limiting groove 32. Each first connecting plate 4 has a limiting hole 41 for coaxial alignment with an adjacent and corresponding connecting hole 31. The connecting bolts 21 are threaded through and fitted. The limiting structure also includes several second connecting plates 42, each corresponding to a limiting groove 32. Each second connecting plate 42 is located on one side of its adjacent first connecting plate 4. Each second connecting plate 42 has a locking hole 421. Locking bolts 23 are threadedly connected to one side of each mating hole 22 on the flange 2. The locking bolts 23 correspond to the locking holes 421 and are threadedly connected. The diameter of the locking holes 421 is smaller than the diameter of the limiting holes 41. The first connecting plate 4 and the second connecting plate 42 are slidably positioned on their respective limiting grooves 32. The first connecting plate 4 and the second connecting plate 42 are configured in the slot 32 and are fitted together by a loading structure. A loading spring 43 is connected between the first connecting plate 4 and the second connecting plate 42. One end of the loading spring 43 is connected to the first connecting plate 4, and the other end is connected to the second connecting plate 42. The loading spring 43 is a square spring and serves as the loading structure. A loading sleeve 44 is fitted onto the loading spring 43. The two ends of the loading sleeve 44 are respectively connected to the first connecting plate 4 and the second connecting plate 42. The loading sleeve 44 is made of elastic material. Anti-detachment grooves 33 are formed on both sides of the limiting slot 32 along the opening direction of the limiting slot 32. Anti-detachment blocks 331 extend from both sides of the first connecting plate 4 and the second connecting plate 42 toward the anti-detachment grooves 33.Each of the aforementioned anti-detachment blocks 331 is slidably disposed in its corresponding anti-detachment groove 33.
[0021] The foregoing has shown and described the basic principles and main features of this utility model, as well as its advantages. 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 may be made to this utility model without departing from its spirit and scope. All such changes and modifications fall within the scope of protection of this utility model as defined by the appended claims and their equivalents.
Claims
1. A high-sealing heater oil pump, comprising a pump body, wherein one end of the pump body is an oil inlet and the other end is an oil outlet, characterized in that: It also includes a flange for installation on the output end of an external oil supply device. The oil inlet end is provided with a connecting plate for coaxial contact with the flange. Several connecting bolts are detachably connected between the connecting plate and the flange. The connecting plate is provided with a limiting structure for applying a radial load to the connecting bolt when it is inserted to limit the bolt from shaking or loosening. The connecting plate is also provided with a loading structure for cooperating with the limiting structure to subject the limiting structure to tension loading, thereby improving the connection strength between the connecting plate and the flange.
2. The high-sealing heater oil pump according to claim 1, characterized in that: The connecting plate has a plurality of connecting holes circumferentially arranged, and each of the connecting holes corresponds to a plurality of connecting bolts and is threadedly engaged. The flange has a mating hole for the corresponding connecting bolt to pass through and be threadedly engaged at the position of each connecting hole. The connecting plate has a limiting groove on one side of each connecting hole, and each limiting groove is connected to its corresponding connecting hole. The limiting structure includes a plurality of first connecting plates, each of the first connecting plates corresponds to a plurality of limiting grooves and each first connecting plate is disposed in its corresponding limiting groove. The first connecting plate has a limiting hole for coaxial alignment with the adjacent and corresponding connecting hole, and the limiting hole is threadedly engaged with the connecting bolt.
3. The high-sealing heater oil pump according to claim 2, characterized in that: The limiting structure also includes several second connecting plates, each corresponding to a certain limiting groove, with each second connecting plate disposed in its respective limiting groove. Each second connecting plate is positioned on one side of its adjacent and corresponding first connecting plate. Each second connecting plate has a locking hole. A locking bolt is threadedly connected to one side of each mating hole on the flange. Several locking bolts correspond to several locking holes and are threadedly connected. The diameter of the locking hole is smaller than the diameter of the limiting hole. The first and second connecting plates are slidably disposed in their respective limiting grooves, and the first and second connecting plates are mated together by a loading structure.
4. A high-sealing heater oil pump according to claim 3, characterized in that: A loading spring is connected between the first connecting plate and the second connecting plate. One end of the loading spring is connected to the first connecting plate and the other end is connected to the second connecting plate. The loading spring is a square spring, which is the loading structure.
5. A high-sealing heater oil pump according to claim 4, characterized in that: The loading spring is fitted with a loading sleeve, and the two ends of the loading sleeve are respectively connected to the first connecting plate and the second connecting plate. The loading sleeve is made of elastic material.
6. A high-sealing heater oil pump according to claim 3, characterized in that: Anti-detachment grooves are provided on both sides of the limiting groove along the opening direction of the limiting groove. Anti-detachment blocks extend from both sides of the first connecting plate and both sides of the second connecting plate toward the anti-detachment groove. Each anti-detachment block is slidably disposed in its corresponding anti-detachment groove.