Double-support high-pressure spiral rubber rotor pump
By introducing a double-support structure into the rubber rotor pump, the problems of low bearing load capacity and poor sealing performance are solved, achieving stable operation and media sealing under heavy load conditions.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- KNIROVA (HANGZHOU) IND EQUIP CO LTD
- Filing Date
- 2025-09-10
- Publication Date
- 2026-07-21
AI Technical Summary
Existing rubber rotor pumps have low bearing capacity and poor sealing, making them prone to vibration and media leakage, especially under heavy load conditions.
The pump employs a dual-support structure, which includes an inner baffle, first and second ball bearings, a dual-support pump cover, and a sealing kit, forming dual support for rotation and sealing, thereby enhancing the bearing load capacity and improving sealing performance.
It improves the load-bearing capacity of the shaft, reduces vibration and axial displacement, ensures stable operation and media sealing under heavy load conditions, and prevents leakage.
Smart Images
Figure CN224532959U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of rotor pump technology, and more specifically, to a double-supported high-pressure spiral rubber rotor pump. Background Technology
[0002] A rubber rotor pump is a device that uses two synchronously rotating rotors in opposite directions to create a sealed volume change within the pump chamber, thereby enabling the intake, transport, and discharge of liquids.
[0003] A rubber rotor pump consists of two internal parts: a pump chamber and a gear chamber. Two sets of meshing gears within the gear chamber allow the pump body's internal shaft to rotate synchronously, which in turn drives two mating rotors within the pump chamber. However, existing rubber rotor pumps typically only have bearings at both ends of the gear chamber to support the shaft, meaning the shafts are only supported on one side, resulting in low load-bearing capacity. When the rotor pump operates under heavy loads, the high pressure on the shaft can easily cause vibration or axial displacement, affecting the pump's operational stability. Furthermore, existing rotor pumps usually only have a sealing kit at the junction of the pump chamber and gear chamber to seal the shaft. When the pressure of the medium flowing through the pump chamber is high, the medium can easily leak from the end of the pump chamber to the outside, affecting the pump's sealing performance. Utility Model Content
[0004] This utility model provides a double-support high-pressure spiral rubber rotor pump, which solves the technical problems of existing rubber rotor pumps, which usually only have bearings at both ends of the gear cavity to support the rotating shaft, so that the two sets of rotating shafts can only be supported on one side, resulting in low load-bearing capacity of the rotating shaft. In addition, existing rotor pumps usually only have sealing kits at the junction of the pump cavity and the gear cavity to seal the rotating shaft, thus affecting the sealing performance of the pump body.
[0005] In view of the above problems, the technical solution proposed by this utility model is as follows: A double-support high-pressure spiral rubber rotor pump includes a pump body. Two sets of rotating shafts are rotatably arranged inside the pump body. One set of rotating shafts extends outward from the outside of the pump body and is connected to the output shaft of an external motor. The pump body is internally composed of a gear cavity and a pump cavity. An inner partition is provided inside the pump body at the junction of the gear cavity and the pump cavity, through which the two sets of rotating shafts pass. A first sealing kit is provided between the inner partition and the rotating shaft. First ball bearings are provided between the two ends of the gear cavity and the rotating shaft. A double-support pump cover is provided at the end of the pump cavity away from the gear cavity. The double-support pump cover is fixedly connected to the outer end of the pump cavity via a flange. Two sets of end bearings for the rotating shafts to pass through are provided at the outer end of the double-support pump cover. Second ball bearings are fixedly provided between the end bearings and the rotating shaft. A second sealing kit is provided between the double-support pump cover and the rotating shaft.
[0006] Furthermore, the gear cavity is provided with two sets of synchronous gears, which are respectively sleeved on the surface of the rotating shaft and mesh with each other.
[0007] Furthermore, the pump chamber is equipped with two sets of cooperating rubber rotors, which are respectively sleeved on two sets of rotating shafts. The pump body is provided with an inlet end and an outlet end on both sides of the pump chamber.
[0008] Furthermore, the outer end of the double-support pump cover is provided with two sets of shaft seat covers, which are fixedly connected to the end shaft seat through flanges. The shaft seat covers can be used to seal the end of the second ball bearing, thereby preventing external dust and impurities from entering the interior through the second ball bearing and improving the sealing and protection effect of the rotor pump end.
[0009] Furthermore, the pump body is fixedly provided with support feet on both sides of the bottom end to provide stable support for the pump body as a whole, and the support feet are provided with fixing holes on both sides of the bottom end.
[0010] Furthermore, the shaft is made of carbon steel and has an electroplated anti-corrosion layer on its surface.
[0011] Compared with the prior art, the beneficial effects of this utility model are as follows: By setting up a double-support pump cover, an end bearing, and a second ball bearing, the outer end of the shaft located on the end bearing can be provided with rotational support. Under the combined action of the second ball bearing and the inner partition, rotational support can be provided at both ends and the middle of the shaft. Thus, a double-support system is formed on both sides of the shaft axially, which runs through the gear cavity and the pump cavity. This improves the load-bearing capacity of the shaft and can effectively reduce the vibration and axial displacement of the shaft during operation. This supports the normal operation of the rotor pump under heavy load conditions, thereby enabling it to output greater pressure. The double-support pump cover and the second sealing kit can provide a sealing effect at the outer end of the shaft located in the pump cavity. Under the combined action of the second sealing kit and the first sealing kit, a double sealing structure can be formed between the two ends of the pump cavity and the double-support pump cover. In addition, more sealing structures can be configured on the double-support pump cover as needed, thereby ensuring the sealing performance of the medium flowing through the pump cavity and effectively preventing leakage due to high medium pressure inside the pump cavity. Attached Figure Description
[0012] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.
[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram showing the disassembled structure of the middle shaft seat and shaft seat cover of this utility model; Figure 3 This is a cross-sectional structural diagram of the present invention; Figure 4 This utility model Figure 3 Enlarged view of point A in the middle.
[0014] In the diagram: 1. Pump body; 2. Rotary shaft; 3. Gear cavity; 4. Pump chamber; 5. Synchronous gear; 6. Rubber rotor; 7. Suction end; 8. Discharge end; 9. Inner partition; 10. First sealing kit; 11. First ball bearing; 12. Double-support pump cover; 13. End bearing seat; 14. Second ball bearing; 15. Second sealing kit; 16. Bearing seat cover; 17. Support leg; 18. Fixing hole. Detailed Implementation
[0015] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, 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, 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 scope of protection of this utility model.
[0016] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.
[0017] Please see Figure 1-4 A double-supported high-pressure spiral rubber rotor pump includes a pump body 1. Two sets of rotating shafts 2 are rotatably arranged inside the pump body 1. One set of rotating shafts 2 extends outward from the pump body 1 and connects to the output shaft of an external motor to form a drive shaft. The other set of rotating shafts 2 is a driven shaft. The pump body 1 is internally composed of a gear cavity 3 and a pump cavity 4. Two sets of synchronous gears 5 are arranged inside the gear cavity 3, respectively sleeved on the surface of the rotating shafts 2 and meshing with each other. When the output shaft of the motor drives one set of rotating shafts 2 to rotate, the other set of rotating shafts 2 will rotate synchronously in the opposite direction under the meshing transmission of the synchronous gears 5. Two sets of cooperating rubber rotors 6 are arranged inside the pump cavity 4, respectively sleeved on the two sets of rotating shafts 2. A suction end 7 and a discharge end 8 are respectively arranged on both sides of the pump body 1 at the pump cavity 4. During the synchronous reverse rotation of the two sets of rotating shafts 2, the two sets of rubber rotors 6 inside the pump cavity 4 will rotate synchronously in the opposite direction, creating a vacuum at the suction end 7 to draw the medium into the pump cavity 4 and discharge it from the discharge end 8.
[0018] In this rotary pump, an inner partition 9 is provided inside the pump body 1 at the junction of the gear cavity 3 and the pump cavity 4, through which two sets of rotating shafts 2 pass. A first sealing kit 10 is provided between the inner partition 9 and the rotating shaft 2, forming a seal at the junction of the gear cavity 3 and the pump cavity 4 to prevent the medium flowing through the pump cavity 4 from leaking into the interior of the gear cavity 3. First ball bearings 11 are provided between the two ends of the gear cavity 3 and the rotating shaft 2, which can provide rotational support for the two ends of the rotating shaft 2 located in the gear cavity 3. A double ball bearing is also provided at the end of the pump cavity 4 away from the gear cavity 3. The pump cover 12 is fixedly connected to the outer end of the pump chamber 4 via a flange. The outer end of the double-support pump cover 12 is provided with two sets of end bearings 13 for the rotating shaft 2 to pass through. A second ball bearing 14 is fixedly provided between the end bearing 13 and the rotating shaft 2. The second ball bearing 14 can provide rotational support for the two sets of rotating shafts 2 at the end positions of the pump chamber 4. A second sealing kit 15 is also provided between the double-support pump cover 12 and the rotating shaft 2, which can form a seal between the ends of the double-support pump cover 12 and the rotating shaft 2 to prevent the medium flowing through the pump chamber 4 from leaking to the outside.
[0019] The double-support pump cover 12, end bearing 13, and second ball bearing 14 provide rotational support for the outer end of the shaft 2 located on the end bearing 13. The second ball bearing 14 and the inner partition 9 provide rotational support for both ends and the middle of the shaft 2. This creates a double-support system on both axial sides of the shaft 2, which runs through the gear cavity 3 and pump cavity 4. This improves the load-bearing capacity of the shaft 2 and effectively reduces vibration and axial displacement of the shaft 2 during operation, ensuring normal operation of the rotor pump under heavy load conditions. The pump can operate and output greater pressure. The double-support pump cover 12 and the second sealing kit 15 can seal the outer end of the shaft 2 in the pump chamber 4. Under the combined action of the second sealing kit 15 and the first sealing kit 10, a double sealing structure can be formed between the two ends of the pump chamber 4 and the double-support pump cover 12. In addition, more sealing structures can be configured on the double-support pump cover 12 as needed, thereby ensuring the sealing performance of the medium flowing through the pump chamber 4 and effectively preventing leakage due to high pressure of the medium inside the pump chamber 4.
[0020] For further details, please refer to Figure 1-4 Two sets of shaft seat covers 16 are provided at the outer end of the double-support pump cover 12. They are fixedly connected to the end shaft seat 13 by flanges. The shaft seat covers 16 can be used to seal the end of the second ball bearing 14, thereby preventing external dust and other impurities from entering the interior through the second ball bearing 14, and improving the sealing and protection effect of the end of the rotor pump.
[0021] For further details, please refer to Figure 1-4The pump body 1 has two fixed feet 17 on the bottom of its two sides, which are used to provide stable support for the pump body 1. The bottom of the feet 17 has two fixing holes 18 on the bottom of its two sides, through which the bottom of the pump body 1 can be fixedly installed on the base for operation.
[0022] Furthermore, the shaft 2 is made of carbon steel, which has high strength and toughness, and can withstand a large load with a small cross-sectional area. Its surface is provided with an electroplated anti-corrosion layer to prevent the medium from corroding the shaft 2 and effectively improve its service life.
[0023] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.
Claims
1. A double-supported high-pressure spiral rubber rotor pump, comprising a pump body (1), characterized in that, The pump body (1) is internally equipped with two sets of rotating shafts (2). The end of one set of rotating shafts (2) extends out of the outside of the pump body (1) and is connected to the output shaft of an external motor. The pump body (1) is internally composed of a gear cavity (3) and a pump cavity (4). An inner partition (9) is provided inside the pump body (1) at the junction of the gear cavity (3) and the pump cavity (4) for the two sets of rotating shafts (2) to pass through. A first sealing kit (10) is provided between the inner partition (9) and the rotating shaft (2). The two ends of the gear cavity (3) are connected to the... A first ball bearing (11) is provided between the rotating shaft (2). A double-support pump cover (12) is provided at the end of the pump chamber (4) away from the gear chamber (3). The double-support pump cover (12) is fixedly connected to the outer end of the pump chamber (4) by a flange. Two sets of end bearing seats (13) are provided at the outer end of the double-support pump cover (12) for the rotating shaft (2) to pass through. A second ball bearing (14) is fixedly provided between the end bearing seat (13) and the rotating shaft (2). A second sealing kit (15) is provided between the double-support pump cover (12) and the rotating shaft (2).
2. The double-supported high-pressure spiral rubber rotor pump according to claim 1, characterized in that, The gear cavity (3) is provided with two sets of synchronous gears (5), which are respectively sleeved on the surface of the rotating shaft (2) and mesh with each other.
3. The double-supported high-pressure spiral rubber rotor pump according to claim 1, characterized in that, The pump chamber (4) is equipped with two sets of rubber rotors (6) that cooperate with each other. The two sets of rubber rotors (6) are respectively sleeved on the two sets of rotating shafts (2). The pump body (1) is provided with a suction end (7) and a discharge end (8) on both sides of the pump chamber (4).
4. The double-supported high-pressure spiral rubber rotor pump according to claim 1, characterized in that, The outer end of the double-support pump cover (12) is provided with two sets of shaft seat covers (16), which are fixedly connected to the end shaft seat (13) by flanges. The shaft seat covers (16) can be used to seal the end of the second ball bearing (14), thereby preventing external dust and impurities from entering the interior through the second ball bearing (14) and improving the sealing and protection effect of the end of the rotor pump.
5. The double-supported high-pressure spiral rubber rotor pump according to claim 1, characterized in that, The pump body (1) is fixedly provided with support legs (17) on both sides of the bottom end, which are used to provide stable support for the pump body (1) as a whole. The support legs (17) are provided with fixing holes (18) on both sides of the bottom end.
6. The double-supported high-pressure spiral rubber rotor pump according to claim 1, characterized in that, The rotating shaft (2) is made of carbon steel and has an electroplated anti-corrosion layer on its surface.