CN110748482B

CN110748482B - Hydraulic machine based on cam transmission principle

Info

Publication number: CN110748482B
Application number: CN201911093044.2A
Authority: CN
Inventors: 马狄
Original assignee: Zhejiang Tai Bang Electric Co ltd
Current assignee: HUBEI XINYE HYDRAULIC MECHANICAL CO LTD
Priority date: 2019-11-11
Filing date: 2019-11-11
Publication date: 2021-09-07
Anticipated expiration: 2039-11-11
Also published as: CN110748482A

Abstract

The invention relates to the technical field of hydraulic machinery, and discloses a hydraulic machinery based on a cam transmission principle, which comprises a pump body, wherein an oil suction ring and a first bearing are fixedly connected inside the pump body, a main shaft is fixedly connected inside the oil suction ring and the first bearing, a baffle plate is fixedly connected inside the pump body, a sealing plate fixing plate is movably connected outside the baffle plate, a side sealing plate is movably connected to one surface of the sealing plate fixing plate, which is far away from the baffle plate, a stator is fixedly connected outside the side sealing plate, a rotor is connected inside the stator in a sliding manner, the disassembly of the device is convenient through the matching use of the sealing plate fixing plate and the side sealing plate, the maintenance or renovation of the inside of the device is convenient, meanwhile, the sealing performance inside the stator is effectively ensured by the side sealing plate, the working efficiency and the working performance are ensured, the leakage is prevented, and the working performance is reduced, and cause damage to the device components.

Description

Hydraulic machine based on cam transmission principle

Technical Field

The invention relates to the technical field of hydraulic machinery, in particular to a hydraulic machinery based on a cam transmission principle.

Background

Hydraulic machines are fluid-operated apparatuses and tools in which hydraulic oil is delivered at high pressure to actuators in the apparatus by means of a hydraulic pump driven by an engine or an electric motor, the hydraulic oil being controlled by operating various hydraulic control valves to obtain a desired pressure or flow rate, and hydraulic components being connected by hydraulic lines, wherein a vane pump is a pump in which vanes in rotor grooves are in contact with a pump housing (stator ring) to press sucked liquid from an oil inlet side to an oil outlet side, and the vanes are pressed against the inner surface of a stator by centrifugal force and pressure oil when a rotor of the vane pump rotates. The working volume formed by the two blades, the rotor and the inner surface of the stator firstly absorbs oil from small to large and then discharges oil from large to small, and when the blades rotate for one circle, oil absorption and oil discharge are completed once.

The existing hydraulic vane motor adopts a spring structure to enable vanes to be tightly attached to a stator for starting, and has the inherent defects brought by the structure, sliding friction is formed between rotor vanes and the stator, the surface friction loss of the stator is large, the product performance and the service life are influenced, when the spring is used for a long time, metal fatigue is easily generated and fails, the failure of the spring can cause poor working reliability, the oil delivery capacity of the hydraulic vane motor is reduced, meanwhile, the space in the stator is limited, in order to ensure the performance of the hydraulic vane motor, the thickness of the vanes is very limited, and the vanes are often deformed to a certain extent under the action of high-pressure fluid, so that the working efficiency of the product is reduced, and the maintenance cost of the product is increased.

In order to solve the problems, the inventor provides a hydraulic machine based on a cam transmission principle, which has the advantages that the stator rotates to absorb oil and discharge oil, the acceptable working strength is high, deformation cannot occur, the work is reliable, the reduction of the working efficiency caused by the deformation of the blade is avoided, rolling friction is adopted between the rolling shaft and the stator, sliding friction is changed into rolling friction, the friction force is reduced, the friction loss is reduced, the service life of a product is prolonged, the spring is removed to control the sliding rotation of the blade and the stator, the structure is simpler and more stable, the working reliability is improved, and the problem of hydraulic oil conveying caused by the failure of the spring is avoided.

Disclosure of Invention

In order to realize the purposes of high acceptable working strength, no deformation, reliable work, small friction loss, long service life, simple structure and stability, the invention provides the following technical scheme: the utility model provides a hydraulic machine based on cam drive principle, includes the pump body, inhales oil ring, first bearing, main shaft, baffle, shrouding fixed plate, side seal board, stator, rotor, roller bearing, ring gear chamber, gear, compression chamber, oil inlet, oil-out, oil inlet duct, oil outlet, second bearing, apron, sealing washer, louvre.

The positions and the connection relations of the structures are as follows:

the oil pump comprises a pump body, an oil suction ring and a first bearing are fixedly connected inside the pump body, a main shaft is fixedly connected inside the oil suction ring and the first bearing, a baffle is fixedly connected inside the pump body, a sealing plate fixing plate is movably connected outside the baffle, a side sealing plate is movably connected on one side, away from the baffle, of the sealing plate fixing plate, a stator is fixedly connected outside the side sealing plate, the stator is connected with a rotor in a sliding manner, a rolling shaft is movably connected inside the rotor, a toothed ring cavity is formed inside the rotor, a gear is meshed and connected inside the toothed ring cavity, a compression cavity is formed inside the stator, an oil inlet and an oil outlet are fixedly connected outside the stator, an oil inlet channel and an oil outlet channel are fixedly connected outside the oil inlet and the oil outlet, a second bearing is fixedly connected outside the main shaft, and a cover plate is fixedly connected outside the second bearing, the outside fixedly connected with sealing washer of apron, the louvre has been seted up to the outside of apron.

Preferably, the number of the baffle plates is two, the two baffle plates are fixedly connected to the left side and the right side inside the pump body respectively, and the two baffle plates are movably connected with the main shaft.

Preferably, the shrouding fixed plate has two, and two shrouding fixed plates all with pump body fixed connection, two shrouding fixed plates all with main shaft swing joint.

Preferably, the side seal board has two, and two side seal boards respectively with two shrouding fixed plates fixed connection, and two side seal boards respectively the left and right sides of fixed connection stator.

Preferably, the rotor is an equilateral triangle cam, the number of the rollers is three, the rollers are respectively and movably connected to three vertex angles of the rotor triangle cam, and the rollers are in sliding connection with the inner wall of the stator.

Preferably, the gear ring cavity is located at the center of the rotor, and the circle center of the gear ring cavity coincides with the center of the rotor.

Preferably, the gear is fixedly connected with the main shaft, the gear is located inside the stator, and the axis of the gear is collinear with the center of the stator.

Preferably, the oil inlets and the oil outlets are respectively two, the two oil inlets and the two oil outlets are fixedly connected with the stator, the two oil inlets are connected to two ends of the oil inlet channel, and the two oil outlets are connected to two ends of the oil outlet channel.

Advantageous effects

Compared with the prior art, the invention provides a hydraulic machine based on a cam transmission principle, which has the following beneficial effects:

1. this hydraulic machine based on cam drive principle uses through the cooperation of shrouding fixed plate and side seal board, makes things convenient for the device's dismantlement, is convenient for to the inside maintenance of the device or renovate, and the inside leakproofness of stator is effectively guaranteed to the side seal board simultaneously, guarantees work efficiency and working property, prevents to produce and leaks to lead to the working property to descend, and lead to the device part to take place to damage.

2. This hydraulic machine based on cam drive principle uses through the cooperation of stator and rotor to get rid of the use to blade and spring, avoid traditional blade hydraulic motor's inherent defect, avoid the blade to take place the possibility of deformation, increase this hydraulic means's acceptable working strength scope, avoid simultaneously leading to the operational reliability to descend because of the spring inefficacy, reduce the work effect, make work more reliable, work efficiency is higher.

3. This hydraulic machine based on cam drive principle uses through the cooperation of rotor and roller bearing, and the sliding friction between rotor and the stator becomes rolling friction during, reduces frictional force, reduces the friction loss of rotor and stator, increases the live time of rotor and stator to increased the life of equipment, also avoided leading to the working property to descend because of the friction loss.

Drawings

FIG. 1 is a schematic view of the overall connection of the structure of the present invention;

FIG. 2 is a schematic view of the A-A section stator, rotor and gear connection of FIG. 1 according to the present invention;

FIG. 3 is an enlarged and schematic view of the rotor roller connection of FIG. 2 according to the present invention;

FIG. 4 is a schematic view of a rotor state of the present invention;

FIG. 5 is a schematic view showing a rotor rotating state according to the present invention.

In the figure: 1. a pump body; 2. an oil suction ring; 3. a first bearing; 4. a main shaft; 5. a baffle plate; 6. a sealing plate fixing plate; 7. a side sealing plate; 8. a stator; 9. a rotor; 10. a roller; 11. a gear ring cavity; 12. a gear; 13. a compression chamber; 14. an oil inlet; 15. an oil outlet; 16. an oil inlet channel; 17. an oil outlet channel; 18. a second bearing; 19. a cover plate; 20. a seal ring; 21. and (4) heat dissipation holes.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-5, a hydraulic machine based on cam transmission principle includes a pump body 1, an oil suction ring 2, a first bearing 3, a main shaft 4, a baffle 5, a sealing plate fixing plate 6, a side sealing plate 7, a stator 8, a rotor 9, a roller 10, a gear ring cavity 11, a gear 12, a compression cavity 13, an oil inlet 14, an oil outlet 15, an oil inlet channel 16, an oil outlet channel 17, a second bearing 18, a cover plate 19, a sealing ring 20, and a heat dissipation hole 21.

The positions and the connection relations of the structures are as follows:

the oil suction ring 2 and the first bearing 3 are fixedly connected inside the pump body 1, the main shaft 4 is fixedly connected inside the oil suction ring 2 and the first bearing 3, the baffle plates 5 are fixedly connected inside the pump body 1, the number of the baffle plates 5 is two, the two baffle plates 5 are respectively fixedly connected to the left side and the right side inside the pump body 1, the two baffle plates 5 are movably connected with the main shaft 4, the outer parts of the baffle plates 5 are movably connected with two sealing plate fixing plates 6, the number of the sealing plate fixing plates 6 is two, the two sealing plate fixing plates 6 are both fixedly connected with the pump body 1, the two sealing plate fixing plates 6 are both movably connected with the main shaft 4, one side of the sealing plate fixing plate 6 far away from the baffle plates 5 is movably connected with a side sealing plate 7, the side sealing plates 7 are two, the two side sealing plates 7 are respectively fixedly connected with the two sealing plate fixing plates 6, the two side sealing plates 7 are respectively fixedly connected with the left side and the right side of the stator 8, and the side sealing plates are used by matching the sealing plate fixing plates 6 and the side sealing plates 7, make things convenient for the device's dismantlement, be convenient for to the inside maintenance or the renovation of the device, the inside leakproofness of stator 8 is effectively guaranteed to side seal board 7 simultaneously, guarantees work efficiency and working property, prevents to produce and leaks to lead to the working property to descend, and lead to the device part to take place to damage, the outside fixedly connected with stator 8 of side seal board 7.

The internal sliding connection of the stator 8 is connected with the rotor 9, the stator 8 and the rotor 9 are used in a matched manner, so that the use of blades and springs is eliminated, the inherent defect of a traditional blade hydraulic motor is avoided, the possibility of deformation of the blades is avoided, the acceptable working strength range of the hydraulic device is increased, meanwhile, the reduction of the working reliability caused by the failure of the springs is avoided, the working effect is reduced, the work is more reliable, the working efficiency is higher, the internal movable connection of the rotor 9 is provided with three rolling shafts 10, the number of the rotor 9 is three, the three rolling shafts 10 are respectively movably connected at three vertex angles of the triangular cam of the rotor 9, the rolling shafts 10 are in sliding connection with the inner wall of the stator 8, the sliding friction between the rotor 9 and the stator 8 is changed into the rolling friction through the matched use of the rotor 9 and the rolling shafts 10, the friction force is reduced, and the friction loss of the rotor 9 and the stator 8 is reduced, the service life of the rotor 9 and the stator 8 is prolonged, thereby prolonging the service life of the equipment and avoiding the reduction of working performance caused by friction loss, a gear ring cavity 11 is arranged inside the rotor 9, the gear ring cavity 11 is positioned at the center of the rotor 9, the circle center of the gear ring cavity 11 is coincided with the center of the rotor 9, a gear 12 is meshed and connected inside the gear ring cavity 11, the gear 12 is fixedly connected with the main shaft 4, the gear 12 is positioned inside the stator 8, the axle center of the gear 12 is collinear with the center of the stator 8, a compression cavity 13 is arranged inside the stator 8, an oil inlet 14 and an oil outlet 15 are fixedly connected outside the stator 8, an oil inlet 16 and an oil outlet 17 are fixedly connected outside the oil inlet 14 and the oil outlet 15, two oil inlets 14 and two oil outlets 15 are respectively provided, the two oil inlets 14 and the two oil outlets 15 are fixedly connected with the stator 8, the two oil inlets 14 are connected with two ends of the oil inlet 16, two oil outlets 15 are connected at two ends of an oil outlet channel 17, a second bearing 18 is fixedly connected to the outside of the main shaft 4, a cover plate 19 is fixedly connected to the outside of the second bearing 18, a sealing ring 20 is fixedly connected to the outside of the cover plate 19, and heat dissipation holes 21 are formed in the outside of the cover plate 19.

The working process and principle are that during working, as the main shaft 4 is fixedly connected with the gear 12, the main shaft 4 drives the gear 12 to rotate, the gear 12 is meshed with the gear ring cavity 11, the gear 12 drives the rotor 9 to rotate, the rotor 9 rotates around the axis of the gear 12 in the stator 8, meanwhile, as the rolling shafts 10 are movably connected with the rotor 9 and are positioned at three vertex angles of the triangular cam of the rotor 9, the rolling shafts 10 are always movably connected with the inner wall of the stator 8, a compression cavity 13 is formed between the two rolling shafts 10, the rotor 9 and the stator 8, as the stator 8 is respectively fixedly connected with the oil inlet 14 and the oil outlet 15, when the compression cavity 13 is expanded, the compression cavity 13 absorbs oil from the oil inlet 14, when the compression cavity 13 is contracted, hydraulic oil is pressed into the oil outlet 15, and along with the rotation of the main shaft 4, the main shaft 4 drives the rotor 9 to repeatedly rotate in the stator 8, the compression cavity 13 is repeatedly expanded and contracted, forming a continuous oil absorption and oil discharge process.

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

Claims

1. Hydraulic machine based on cam transmission principle, comprising a pump body (1), characterized in that: the oil suction ring (2) and the first bearing (3) are fixedly connected inside the pump body (1), the main shaft (4) is fixedly connected inside the oil suction ring (2) and the first bearing (3), the baffle (5) is fixedly connected inside the pump body (1), the sealing plate fixing plate (6) is movably connected outside the baffle (5), one side, far away from the baffle (5), of the sealing plate fixing plate (6) is movably connected with the side sealing plate (7), the stator (8) is fixedly connected outside the side sealing plate (7), the rotor (9) is connected inside the stator (8) in a sliding connection mode, the rolling shaft (10) is movably connected inside the rotor (9), the toothed ring cavity (11) is formed inside the rotor (9), the gear (12) is connected inside the toothed ring cavity (11) in a meshing mode, the compression cavity (13) is formed inside the stator (8), two oil inlets (14) of outside fixedly connected with and two oil-out (15) of stator (8), oil inlet (16) and oil outlet (17) are all the way to the outside fixed connection of oil inlet (14) and oil-out (15), the outside fixedly connected with second bearing (18) of main shaft (4), two oil inlets (14) are connected at the both ends of oil inlet (16), and the both ends at oil outlet (17) are connected in two oil-out (15), the outside fixedly connected with apron (19) of second bearing (18), the outside fixedly connected with sealing washer (20) of apron (19), louvre (21) have been seted up to the outside of apron (19).

2. Hydraulic machine according to claim 1, characterised in that it comprises: the two baffles (5) are respectively fixedly connected to the left side and the right side inside the pump body (1), and the two baffles (5) are movably connected with the main shaft (4).

3. Hydraulic machine according to claim 1, characterised in that it comprises: the two sealing plate fixing plates (6) are fixedly connected with the pump body (1), and the two sealing plate fixing plates (6) are movably connected with the main shaft (4).

4. Hydraulic machine according to claim 1, characterised in that it comprises: the two side sealing plates (7) are fixedly connected with the two sealing plate fixing plates (6) respectively, and the two side sealing plates (7) are fixedly connected with the left side and the right side of the stator (8) respectively.

5. Hydraulic machine according to claim 1, characterised in that it comprises: the rotor (9) is an equilateral triangle cam, the number of the rolling shafts (10) is three, the rolling shafts are respectively movably connected to three vertex angles of the rotor (9) triangle cam, and the rolling shafts (10) are slidably connected with the inner wall of the stator (8).

6. Hydraulic machine according to claim 1, characterised in that it comprises: the gear ring cavity (11) is located at the center of the rotor (9), and the circle center of the gear ring cavity (11) is coincided with the center of the rotor (9).

7. Hydraulic machine according to claim 1, characterised in that it comprises: the gear (12) is fixedly connected with the main shaft (4), the gear (12) is located inside the stator (8), and the axis of the gear (12) is collinear with the center of the stator (8).