Cam pump capable of automatically compensating abrasion

Abstract

The utility model discloses a cam pump capable of automatically compensating abrasion, which comprises a stator, end covers are arranged on both sides of the stator, a rotating shaft is rotatably connected in the stator, a cam rotor is arranged outside the rotating shaft, a cam sealing groove is formed in the cam rotor, and a cam sealing strip is arranged in the cam sealing groove. Stator blade grooves are formed in the stator, blade shafts are arranged in the stator blade grooves, blades are arranged outside the blade shafts, blade springs are arranged outside the blades, and the blade springs are fixedly connected to the inner wall of the stator. According to the device, the sealing strip and the blade automatically adjust the sealing pressure along with the change of the medium pressure during working, unnecessary friction is reduced while the sealing effect is guaranteed, the service life is prolonged, energy loss caused by friction is reduced, reciprocating motion of a piston connecting rod mechanism is avoided, and the service life of the device is prolonged. Therefore, idle work caused by overcoming inertia is avoided, and the working efficiency is improved.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of cam pumps, and particularly relates to a cam pump capable of automatically compensating for wear. BACKGROUND

[0002] At present, similar products on the market include piston pumps, gear pumps, vane pumps, and rotor piston engines, etc., and various structures have their own shortcomings, for example, the piston connecting rod structure needs to overcome the reciprocating inertia of the piston to consume additional power, the sealing piston ring needs to be replaced after being used to a certain extent, and maintenance is difficult. The gear pump and the vane pump need very precise machining precision to ensure the sealing effect, and the medium viscosity directly affects the working effect, even so, a good sealing effect cannot be achieved, and the Wankel engine with a triangular piston has sealing difficulties and serious wear, and the vane pump is difficult to seal the gap between the vane and the rotor and is prone to wear. SUMMARY

[0003] In view of the deficiencies in the prior art, the present application aims to provide a cam pump capable of automatically compensating for wear, which has the advantages of high efficiency, good sealing effect, simple structure, easy production and manufacturing, and automatic wear compensation.

[0004] To achieve the above-mentioned purpose, the present application provides the following technical scheme: a cam pump capable of automatically compensating for wear, comprising a stator, end covers are arranged on both sides of the stator, a rotating shaft is rotatably connected inside the stator, a cam rotor is arranged outside the rotating shaft, a cam sealing groove is formed inside the cam rotor, a cam sealing strip is arranged inside the cam sealing groove, a stator vane groove is formed inside the stator, a vane shaft is arranged inside the stator vane groove, a vane is arranged outside the vane shaft, a vane spring is arranged outside the vane, and the vane spring is fixedly connected to the inner wall of the stator.

[0005] Preferably, a first channel hole is arranged inside the stator, and a second channel hole is arranged inside the stator.

[0006] Preferably, a pressure balance hole is formed inside the cam rotor, the number of the pressure balance hole is four, and the four pressure balance holes are uniformly distributed outside the cam rotor.

[0007] Preferably, a cam sealing strip is arranged inside the cam rotor.

[0008] Preferably, a first working cavity is formed inside the stator, and a second working cavity is formed inside the stator.

[0009] Preferably, a stator end face sealing groove is arranged inside the stator, and the stator end face sealing groove is located on the inner wall of the stator.

[0010] Compared with the prior art, the beneficial effects of the present invention are:

[0011] 1. This device avoids the reciprocating motion of the piston-connecting rod mechanism, thus avoiding wasted effort due to overcoming inertia and improving work efficiency. Due to the characteristics of this invention's structure, the intake and exhaust of the working medium can be carried out simultaneously, thereby improving work efficiency. When used as an air pump or pneumatic motor, it increases power. Because of its good linearity of input and output torque, it operates smoothly with less vibration. Due to its wear compensation function, it greatly extends the machine's service life and maintenance cycle, while reducing the requirements for production precision. The sealing strip and blades of this invention automatically adjust the sealing pressure according to the change of medium pressure during operation, ensuring the sealing effect while reducing unnecessary friction, which increases service life and reduces energy loss caused by friction. When rotating forward, this invention can be used as an air pump or hydraulic pump, etc. If the intake and exhaust ports are reversed, it can be used as a pneumatic motor or hydraulic motor, etc. It can also be used as a liquid flow metering pump or vacuum pump. Therefore, this device has a very wide range of applications.

[0012] 2. The stator has stator blade slots, and blades are installed in the slots. One end of the blade is fixed to the stator via a blade shaft, while the other end can swing back and forth within a certain range around the blade shaft. Channel holes are opened on both sides of the blades for the entry and exit of the working medium. The rotor has one or several evenly spaced cams, each with a cam sealing groove at its apex. A cam sealing strip is inlaid in the cam sealing groove and slides to seal against the inner wall of the stator. When the cam rotor rotates, the non-fixed end of the blade is always pressed tightly against the surface of the cam rotor under the combined action of the blade spring and the medium pressure, thus achieving a sealing effect and automatic compensation for blade wear. When the top of the cam rotor rotates to the vicinity of the stator blade slot, the blade closes in the stator blade slot under the push of the cam rotor, simultaneously sealing the channel opening. The channel opening is directly connected to the outside. The end cover and the stator end face are sealed by the stator end face sealing groove and the sealing strip embedded in the sealing groove, and fixed with screws. The two end faces of the cam rotor and the end cover are slidably sealed by the sealing strip embedded in the rotor end face sealing groove. The cam sealing groove is connected to the pressure balance hole. When there is a high pressure medium in the first working chamber, it will transmit the pressure to the cam sealing strip, so that the cam sealing strip is pressed tightly against the inner wall of the stator, thereby achieving the effect of sealing and wear compensation. When the cam part of the cam rotor passes the stator blade groove, the non-fixed end of the blade re-engages with the outer surface of the rotor to start the next working cycle. According to different application scenarios, several cams on the cam rotor can be evenly arranged along the circumference. Similarly, several blade grooves, blades and the first channel holes and second channel holes on both sides of the blades on the stator can also be evenly arranged along the circumference. According to different application scenarios, we can also adjust the shape of the rotor cam to achieve the best working effect. Attached Figure Description

[0013] Fig. 1 This is a schematic diagram of the overall structure of the present invention;

[0014] Fig. 2 This is a schematic diagram of the overall side structure of the present invention;

[0015] Fig. 3 This is a schematic diagram of the cam rotor structure of the present invention.

[0016] In the diagram: 1. Stator; 2. Cam rotor; 3. End cover; 4. Blade; 5. First channel hole; 6. Second channel hole; 7. Cam sealing groove; 8. Cam sealing strip; 9. Blade spring; 10. Rotating shaft; 11. Stator blade groove; 12. Stator end face sealing groove; 13. Pressure balance hole; 14. First working chamber; 15. Second working chamber; 16. Blade shaft. Detailed Implementation

[0017] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. Example

[0018] Please see Figs. 1-3 The present invention provides a technical solution: a cam pump capable of automatically compensating for wear, comprising a stator 1, end caps 3 on both sides of the stator 1, a rotating shaft 10 rotatably connected inside the stator 1, a cam rotor 2 outside the rotating shaft 10, a cam sealing groove 7 inside the cam sealing groove 7, a cam sealing strip 8 inside the cam sealing groove 7, a stator blade groove 11 inside the stator 1, a blade shaft 16 inside the stator blade groove 11, blades 4 outside the blade shaft 16, and blade springs 9 outside the blades 4, which are fixedly connected to the inner wall of the stator 1.

[0019] In this embodiment, when used as an air pump, the cam rotor 2 rotates counterclockwise under external force. The cam and blade 4 of the cam rotor 2 divide the space formed by the stator 1 and the end cover 3 of the cam rotor 2 into a first working chamber 14 and a second working chamber 15. As the cam rotor 2 rotates counterclockwise, the volume of the second working chamber 15 gradually increases, allowing air to enter the second working chamber 15 through the second channel hole 6. At the same time, the volume of the first working chamber 14 gradually decreases, discharging the internal gas from the first channel hole 5. When the cam rotor 2 continues to rotate, the top of the cam of the cam rotor 2 presses the blade 4 into the stator blade groove 11. After the blade 4 squeezes all the gas out of the first working chamber 14 through the first channel hole 5, the blade 4 closes the first channel hole 5. When the cam rotor 2 continues to rotate, after the top of the cam of the cam rotor 2 passes over the stator blade groove 11, under the action of the blade spring 9, the non-fixed end of the blade 4 quickly returns to pressing against the surface of the cam rotor 2, dividing the space again into the first working chamber 14 and the second working chamber 15, and starting the next working cycle. Example

[0020] Please see Figs. 1-3 Based on Embodiment 1, the present invention provides a technical solution: Four pressure balance holes 13 are formed inside the cam rotor 2, and these four pressure balance holes 13 are evenly distributed on the outside of the cam rotor 2. A cam sealing strip 8 is provided inside the cam rotor 2. A first working cavity 14 and a second working cavity 15 are formed inside the stator 1. A stator end face sealing groove 12 is provided inside the stator 1, and the stator end face sealing groove 12 is located on the inner wall of the stator 1. It is understood that the number of pressure balance holes 13 is not limited to four; other numbers are also possible.

[0021] In this embodiment, when used as a pneumatic motor, the cam rotor 2 rotates clockwise. The cam top of the cam rotor 2 and the blade 4 divide the space to form a first working chamber 14 and a second working chamber 15. When high-pressure gas enters through the first channel hole 5, the cam rotor rotates clockwise under pressure. The volume of the first working chamber 14 gradually increases, while the volume of the second working chamber 15 gradually decreases, lifting the internal gas through the second channel hole 6 and discharging it. When the cam rotor 2 continues to rotate, the cam top presses the blade 4 into the stator blade slot 11. The blade 4 closes the first channel hole 5, cutting off the high-pressure air intake. When the rotor continues to rotate, after the cam top of the cam rotor 2 passes over the stator blade slot 11, the non-fixed end of the blade 4 is quickly pressed tightly against the rotor surface under the combined action of the blade spring 9 and the high-pressure air intake, dividing the working chamber into the first working chamber 14 and the second working chamber 15 again, and starting the next working cycle.

[0022] The working principle and usage process of this invention: When used as an air pump, the cam rotor 2 rotates counterclockwise under the drive of an external force. The cam and blade 4 of the cam rotor 2 divide the space formed by the stator 1 and the end cover 3 of the cam rotor 2 into a first working chamber 14 and a second working chamber 15. As the cam rotor 2 rotates counterclockwise, the volume of the second working chamber 15 gradually increases, allowing air to enter the second working chamber 15 through the second channel hole 6. Simultaneously, the volume of the first working chamber 14 gradually decreases, expelling internal gas from the first channel hole 5. When the cam rotor 2 continues to rotate, the cam tip of the cam rotor 2 presses the blade 4 into the stator blade slot 11. After the blade 4 forces all the gas out of the first working chamber 14 through the first channel hole 5, the blade 4 closes the first channel hole 5. As the cam rotor 2 continues to rotate, the cam tip of the cam rotor 2 passes over the stator blade slot 11. Under the action of the blade spring 9, the non-fixed end of the blade 4 quickly returns to its original position on the surface of the cam rotor 2, again dividing the space into the first working chamber 14 and the second working chamber 15, beginning the next working cycle. When used as a pneumatic motor, the cam rotor 2 rotates clockwise, and the cam tip of the cam rotor 2 and the blade 4 divide the space to form the first working chamber 14 and the second working chamber 15. When high-pressure gas enters through the first channel hole 5, the cam rotor rotates clockwise under pressure, the volume of the first working chamber 14 gradually increases, and the volume of the second working chamber 15 gradually decreases, lifting the internal gas through the second channel hole 6 and discharging it. When the cam rotor 2 continues to rotate, the top of the cam presses the blade 4 into the stator blade slot 11, and the blade 4 seals the first channel hole 5, cutting off the high-pressure gas intake. When the rotor continues to rotate, after the top of the cam of the cam rotor 2 passes over the stator blade slot 11, the non-fixed end of the blade 4 is quickly pressed tightly against the rotor surface under the combined action of the blade spring 9 and the high-pressure gas intake, dividing the working chamber into the first working chamber 14 and the second working chamber 15 again, and starting the next working cycle.

[0023] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A cam pump capable of automatically compensating for wear, comprising a stator (1), characterized in that: Both sides of the stator (1) are provided with end caps (3). The stator (1) is rotatably connected to a rotating shaft (10). A cam rotor (2) is provided outside the rotating shaft (10). A cam sealing groove (7) is provided inside the cam rotor (2). A cam sealing strip (8) is provided inside the cam sealing groove (7). A stator blade groove (11) is provided inside the stator (1). A blade shaft (16) is provided inside the stator blade groove (11). A blade (4) is provided outside the blade shaft (16). A blade spring (9) is provided outside the blade (4). The blade spring (9) is fixedly connected to the inner wall of the stator (1).

2. A cam pump capable of automatically compensating for wear according to claim 1, characterized in that: The stator (1) has a first channel hole (5) inside and a second channel hole (6) inside.

3. A cam pump capable of automatically compensating for wear according to claim 1, characterized in that: The cam rotor (2) has four pressure balance holes (13) inside, and the four pressure balance holes (13) are evenly distributed on the outside of the cam rotor (2).

4. A cam pump capable of automatically compensating for wear according to claim 1, characterized in that: The cam rotor (2) is provided with a cam sealing strip (8) inside.

5. A cam pump capable of automatically compensating for wear according to claim 1, characterized in that: The stator (1) has a first working cavity (14) inside and a second working cavity (15) inside.

6. A cam pump capable of automatically compensating for wear according to claim 1, characterized in that: The stator (1) is provided with a stator end face sealing groove (12) inside, and the stator end face sealing groove (12) is located on the inner wall of the stator (1).

Images