CN111520276A - Novel tilt cylinder mechanism for hydraulic motor - Google Patents
Novel tilt cylinder mechanism for hydraulic motor Download PDFInfo
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- CN111520276A CN111520276A CN202010511145.3A CN202010511145A CN111520276A CN 111520276 A CN111520276 A CN 111520276A CN 202010511145 A CN202010511145 A CN 202010511145A CN 111520276 A CN111520276 A CN 111520276A
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- Prior art keywords
- plunger
- cylinder body
- oil
- ring
- wear
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03C—POSITIVE-DISPLACEMENT ENGINES DRIVEN BY LIQUIDS
- F03C1/00—Reciprocating-piston liquid engines
- F03C1/02—Reciprocating-piston liquid engines with multiple-cylinders, characterised by the number or arrangement of cylinders
- F03C1/04—Reciprocating-piston liquid engines with multiple-cylinders, characterised by the number or arrangement of cylinders with cylinders in star or fan arrangement
- F03C1/053—Reciprocating-piston liquid engines with multiple-cylinders, characterised by the number or arrangement of cylinders with cylinders in star or fan arrangement the pistons co-operating with an actuated element at the inner ends of the cylinders
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03C—POSITIVE-DISPLACEMENT ENGINES DRIVEN BY LIQUIDS
- F03C1/00—Reciprocating-piston liquid engines
- F03C1/02—Reciprocating-piston liquid engines with multiple-cylinders, characterised by the number or arrangement of cylinders
- F03C1/04—Reciprocating-piston liquid engines with multiple-cylinders, characterised by the number or arrangement of cylinders with cylinders in star or fan arrangement
- F03C1/0403—Details, component parts specially adapted of such engines
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03C—POSITIVE-DISPLACEMENT ENGINES DRIVEN BY LIQUIDS
- F03C1/00—Reciprocating-piston liquid engines
- F03C1/02—Reciprocating-piston liquid engines with multiple-cylinders, characterised by the number or arrangement of cylinders
- F03C1/04—Reciprocating-piston liquid engines with multiple-cylinders, characterised by the number or arrangement of cylinders with cylinders in star or fan arrangement
- F03C1/0403—Details, component parts specially adapted of such engines
- F03C1/0406—Pistons
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03C—POSITIVE-DISPLACEMENT ENGINES DRIVEN BY LIQUIDS
- F03C1/00—Reciprocating-piston liquid engines
- F03C1/02—Reciprocating-piston liquid engines with multiple-cylinders, characterised by the number or arrangement of cylinders
- F03C1/04—Reciprocating-piston liquid engines with multiple-cylinders, characterised by the number or arrangement of cylinders with cylinders in star or fan arrangement
- F03C1/0403—Details, component parts specially adapted of such engines
- F03C1/0415—Cylinders
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03C—POSITIVE-DISPLACEMENT ENGINES DRIVEN BY LIQUIDS
- F03C1/00—Reciprocating-piston liquid engines
- F03C1/02—Reciprocating-piston liquid engines with multiple-cylinders, characterised by the number or arrangement of cylinders
- F03C1/04—Reciprocating-piston liquid engines with multiple-cylinders, characterised by the number or arrangement of cylinders with cylinders in star or fan arrangement
- F03C1/0403—Details, component parts specially adapted of such engines
- F03C1/0435—Particularities relating to the distribution members
- F03C1/0444—Particularities relating to the distribution members to plate-like distribution members
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Hydraulic Motors (AREA)
Abstract
The invention discloses a novel tilt cylinder mechanism for a hydraulic motor, wherein high-pressure oil is communicated to the inside of a swing cylinder body (5) through inclined holes of an oil communicating disc (1), a flow distribution mechanism (2) and a rear cover (3) and is transmitted to a plunger (8), and the swing cylinder body (5) and the plunger (8) are always in a centering state with a spherical plunger support ring (15) through a hydrostatic bearing (11); the rear end of the swing cylinder body (5) can rotate around a spherical hinge (6), and the spherical hinge (6) is fixed on a transition sleeve (7); the left end and the right end of the swing cylinder body (5) are respectively connected with a wear-resistant floating ring (9) in a contact manner, and the swing cylinder body (5) and the wear-resistant floating ring (9) achieve an ideal static pressure sealing effect through a floating sealing component (4). The high pressure oil is transmitted to a crankshaft (14) through a static pressure bearing (11) and a radial roller bearing (13), so that the output of power is realized. Through the arrangement, the invention has the advantages of high rotating speed, high bearing capacity, high power, low abrasion and the like.
Description
Technical Field
The invention relates to the technical field of hydraulic motors, in particular to a novel swing cylinder mechanism for a hydraulic motor.
Background
The hydraulic motor is an actuator of the hydraulic system, which converts the hydraulic pressure energy provided by the hydraulic pump into mechanical energy (torque and rotational speed) of its output shaft. The method is widely applied to the fields of injection molding machinery, ships, lifting machines, engineering machinery, construction machinery, coal mine machinery, mining machinery, metallurgical machinery, ship machinery, petrochemical industry, port machinery and the like.
The power of the hydraulic motor is mainly determined by the pressure of the motor, the displacement of the motor and the actual output rotating speed (power is motor pressure and motor displacement and motor rotating speed/60), the size of the displacement of the hydraulic motor is limited by the external dimension of the hydraulic motor, most of the existing large-torque hydraulic motors are low-speed hydraulic motors, and the output power of the motor can be greatly improved if the rotating speed and the pressure of the motor can be improved. The structural form of the tilt cylinder mechanism, which is a main component of the hydraulic motor, directly determines the rotation speed and pressure of the motor. In order to improve the energy utilization rate and enable the hydraulic motor to exert larger power, a cylinder oscillating mechanism capable of realizing high pressure and high rotation speed is urgently needed.
In the prior art, the structure of a tilt cylinder mechanism of a hydraulic motor is shown in fig. 1, high-pressure oil passes through an oil passing disc 1 ', passes through a flow distribution mechanism 2', passes through an inclined hole in a rear cover 3 ', passes through the interior of a swing cylinder body 5', is transmitted to a plunger 8 ', the swing cylinder body 5' and the plunger 8 'are kept in alignment with a spherical plunger support ring 15' through a hydrostatic bearing 11 ', and the high-pressure oil is transmitted to a crankshaft 14' through the hydrostatic bearing 11 'and a centripetal roller bearing 13', so that power output is realized. Left and right trunnions (501 'and 502') are respectively arranged at two sides of the swing cylinder body 5 'to be connected with an oil inlet structure, and if the concentricity of the left and right trunnions cannot be well made, the swing cylinder body in the structure can cause serious abrasion between the trunnions and the end cover 3' when the rotating speed of the swing cylinder body is high, so that the lifting of the rotating speed is limited. In addition, since the rollers of the radial roller bearing 13' have gaps therebetween, the positions of the rollers cannot be always fixed, which limits the increase in the rotational speed and causes heat generation due to wear.
Disclosure of Invention
In order to solve the technical problems, the invention aims to provide a novel tilt cylinder mechanism for a hydraulic motor, which has the characteristics of high rotating speed, high pressure, low loss and the like.
Aiming at the problems, the invention adopts a technical scheme that: the utility model provides a hydraulic motor is with novel tilt cylinder mechanism, includes: the plunger oil pump comprises an oil passing disc, an oil distribution mechanism, a rear cover, a swinging cylinder body, a plunger, a shell, a transition sleeve, a hydrostatic bearing, a centripetal roller bearing, a plunger support ring, a plunger clamping ring and a crankshaft, wherein an oil inlet channel is arranged on the oil passing disc, an inclined hole communicated with the oil inlet channel is arranged on the rear cover, high-pressure oil passes through the oil passing disc, passes through the inclined hole of the oil distribution mechanism and the inclined hole of the rear cover, is communicated to the inside of the swinging cylinder body and is transmitted to the plunger, the swinging cylinder body and the plunger are always in a centering state through the hydrostatic bearing and the plunger support ring, the pressure of the plunger is transmitted to the crankshaft through the hydrostatic bearing and the centripetal roller bearing, and the plunger clamping ring ensures that the plunger and the crankshaft are always kept in contact with: the left end and the right end of the swing cylinder body are respectively in contact connection with a wear-resistant floating ring, the swing cylinder body and the wear-resistant floating ring achieve a static pressure sealing effect through a floating sealing assembly between the wear-resistant floating rings at the left end and the right end and the swing cylinder body, a first clamping groove is formed in the rear cover, and the wear-resistant floating ring at the left end is arranged in the first clamping groove; a second clamping groove is formed in the shell, and a wear-resistant floating ring at the right end is arranged in the second clamping groove.
Furthermore, one end, far away from the crankshaft, of the swing cylinder body can rotate around a spherical hinge, and the spherical hinge is installed on the transition sleeve.
Further, the radial roller bearing comprises a roller partition fence, wherein a plurality of roller installation grooves are formed in the roller partition fence, and the roller installation grooves are used for installing each roller of the radial roller bearing, so that the relative position of each roller is kept fixed.
Furthermore, an oil inlet channel on the oil through disc is arranged along the axial direction of the oil through disc.
Further, the surface hardness of the swing cylinder body and the plunger is more than or equal to 60 HRC.
Furthermore, the wear-resistant floating ring adopts 42CrMo as a body and a layer of wear-resistant coating material is sprayed on the surface of the body.
Further, the floating seal assembly adopts the combination form of polytetrafluoroethylene sealing ring + fluororubber O type circle, the polytetrafluoroethylene sealing ring sets up the indent sphere, the indent sphere is used for restricting the position of fluororubber O type circle.
The invention has the beneficial effects that: 1. the design of left and right trunnions is omitted, the swing cylinder body is connected with the floating seal assembly through the wear-resistant floating ring, so that the rotating speed of the swing cylinder body can be higher, compared with a hydraulic motor in the conventional technology, the rotating speed can be increased by 40-50%, the pressure can be increased by 35-45%, and the output power of the motor can be greatly increased; 2. the radial roller bearing is additionally provided with the roller partition fence, so that the resistance area of the roller is reduced, the generated heat is minimized, meanwhile, the through flow of the surface of the roller is better, the heat dissipation effect is optimized, the working performance of the radial roller bearing is greatly improved, the possibility of high-speed operation is provided, and the service life of accessories is prolonged; 3. the oil passing disc is provided with the axial oil inlet channel, so that the power loss in large flow is reduced, the oil inlet is smoother, and the optimal oil distribution capacity is ensured; 4. the hardness is improved by surface treatment of the swing cylinder body and the plunger, and the phenomenon of seizure is prevented; 5. the centripetal roller bearing reduces the sliding speed between the bottom of the plunger and the spherical plunger support ring to the minimum, thereby reducing friction, abrasion and heat generation, improving starting torque, widening the running range of the motor at low speed (reduced crawling) and high speed and reducing friction; 6. the plunger retaining ring ensures that the plunger remains in contact with the crankshaft under any operating conditions, even in the case of a cavity.
Drawings
FIG. 1 is a schematic structural view of a tilt cylinder mechanism in the conventional art;
FIG. 2 is a schematic structural diagram of a preferred embodiment of the present invention;
FIG. 3 is a left side view of FIG. 1;
FIG. 4 is an enlarged view of a spherical hinge portion in an embodiment of the present invention;
FIG. 5 is an enlarged view of a portion of a floating seal arrangement in an embodiment of the present invention;
FIG. 6 is a method view of a flow distribution mechanism in an embodiment of the present invention;
FIG. 7 is a view showing the arrangement of the oscillating cylinder and the plunger in the embodiment of the present invention;
fig. 8 is a schematic view of the structure of the roller cage in an embodiment of the present invention.
Detailed Description
The following detailed description of the preferred embodiments of the present invention, taken in conjunction with the accompanying drawings, will make the advantages and features of the invention easier to understand by those skilled in the art, and thus will clearly and clearly define the scope of the invention.
Examples
Referring to fig. 2 to 8, a novel tilt cylinder mechanism for a hydraulic motor according to an embodiment of the present invention includes: the oil distribution device comprises an oil passing disc 1, an oil distribution mechanism 2, a rear cover 3, a swinging cylinder 5, a plunger 8, a shell 10, a transition sleeve 7, a hydrostatic bearing 11, a radial roller bearing 13, a spherical plunger support ring 15, a plunger clamping ring 12 and a crankshaft 14; the oil through disc 1 is provided with a first oil inlet channel 1a and a second oil inlet channel 1b along the axial direction, the rear cover 3 is provided with an inclined hole 3a communicated with the first oil inlet channel 1a and the second oil inlet channel 1b, high-pressure oil passes through the oil through disc 1, passes through the flow distribution mechanism 2 and the inclined hole 3a of the rear cover 3, then is communicated to the inside of the swing cylinder 5 and is transmitted to the plunger 8, the swing cylinder 5 and the plunger 8 are always in a centering state through a hydrostatic bearing 11 and a spherical plunger support ring 15, the pressure of the plunger 8 is transmitted to a crankshaft 14 through the hydrostatic bearing 11 and a radial roller bearing 13, and the plunger clamping ring 12 ensures that the plunger 8 and the crankshaft 14 are always kept in contact.
The left end and the right end of the swing cylinder body 5 are respectively in contact connection with a wear-resistant floating ring 9, and the wear-resistant floating rings 9 at the left end and the right end and the swing cylinder body 5 are respectively in contact connection with each other through a floating seal assembly 4, so that the swing cylinder body 5 and the wear-resistant floating rings 9 achieve a static pressure sealing effect; the rear cover 3 is provided with a first clamping groove, and the wear-resistant floating ring 5 at the left end is arranged in the first clamping groove; the shell 10 is provided with a second clamping groove, and the wear-resistant floating ring 5 at the right end is arranged in the second clamping groove. The wear-resistant floating ring 9 and the floating seal assembly 4 replace the traditional trunnion structure, so that the lateral load between a swing rigid body and a plunger is avoided, the problem that the rotation speed of a motor is limited by the concentricity of a trunnion in the prior art is solved, and the rotation speed of the motor can be increased by more than 20-30%.
The end of the swing cylinder body 5 can rotate around the spherical hinge 6, and the spherical hinge 6 is arranged on the transition sleeve 7 through a bolt.
The radial roller bearing 13 comprises a roller partition 16, and a plurality of roller mounting grooves are formed in the roller partition 16 and used for mounting each roller of the radial roller bearing 13, so that the relative position of each roller is kept fixed. The roller separating fence 16 can reduce the resistance area of the roller, make the through-flow performance of the roller surface better, maximize the speed of the motor, reduce the abrasion and heat generation, and greatly improve the working performance of the radial roller bearing 13, thereby improving the possibility of high-speed operation and prolonging the service life of accessories.
The surfaces of the swing cylinder body 5 and the plunger 8 are pretreated to ensure that the surface hardness is more than or equal to 60HRC, so that the seizure phenomenon is prevented.
Comparative example
Referring to fig. 1, a tilt cylinder mechanism with a trunnion structure in the prior art is shown.
The output powers, speeds and pressures of the comparative examples and comparative examples are given in the table below, with the same overall dimensions and motor displacement (380 mm outside diameter, 425mL/r displacement).
| Sample numbering | Pressure of motor | Speed of motor | Output power |
| Examples | 28Mpa | 570r/min | 113kW |
| Comparative example | 20Mpa | 380r/min | 53.8kW |
Compared with the traditional structure of the tilt cylinder mechanism, the tilt cylinder mechanism provided by the embodiment of the invention can greatly improve the rotating speed, the pressure and the output power, so that the motor has higher working efficiency and pressure bearing capacity, and has the advantages of high mechanical efficiency, high volumetric efficiency and the like; meanwhile, the friction, the abrasion and the heat generation are reduced, the starting torque is improved, the running range of the motor at low speed (creep reduction) and high speed is widened, and the friction is reduced.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes performed by the present specification and drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (7)
1. A novel tilt cylinder mechanism for a hydraulic motor, comprising: the plunger oil pump comprises an oil passing disc, an oil distribution mechanism, a rear cover, a swinging cylinder body, a plunger, a shell, a transition sleeve, a hydrostatic bearing, a centripetal roller bearing, a plunger support ring, a plunger clamping ring and a crankshaft, wherein an oil inlet channel is arranged on the oil passing disc, an inclined hole communicated with the oil inlet channel is arranged on the rear cover, high-pressure oil passes through the oil passing disc, passes through the inclined hole of the oil distribution mechanism and the inclined hole of the rear cover, is communicated to the inside of the swinging cylinder body and is transmitted to the plunger, the swinging cylinder body and the plunger are always in a centering state through the hydrostatic bearing and the plunger support ring, the pressure of the plunger is transmitted to the crankshaft through the hydrostatic bearing and the centripetal roller bearing, and the plunger clamping ring ensures that the plunger and the crankshaft are always kept in contact with: the left end and the right end of the swing cylinder body are respectively in contact connection with a wear-resistant floating ring, the swing cylinder body and the wear-resistant floating ring achieve a static pressure sealing effect through a floating sealing assembly between the wear-resistant floating rings at the left end and the right end and the swing cylinder body, a first clamping groove is formed in the rear cover, and the wear-resistant floating ring at the left end is arranged in the first clamping groove; a second clamping groove is formed in the shell, and a wear-resistant floating ring at the right end is arranged in the second clamping groove.
2. The novel tilt cylinder mechanism for a hydraulic motor according to claim 1, wherein an end of the tilt cylinder body away from the crankshaft is rotatable about a ball joint, and the ball joint is mounted on the transition sleeve.
3. The novel tilt cylinder mechanism for hydraulic motor according to claim 1, wherein the radial roller bearing comprises a roller partition bar, and a plurality of roller mounting grooves are formed on the roller partition bar, and are used for mounting each roller of the radial roller bearing, so that the relative position of each roller is kept fixed.
4. The novel tilt cylinder mechanism for the hydraulic motor according to claim 1, wherein an oil inlet channel on the oil through pan is arranged along an axial direction of the oil through pan.
5. The novel tilt cylinder mechanism for hydraulic motor as claimed in claim 1, wherein the surface hardness of the tilt cylinder body and the plunger is greater than or equal to 60 HRC.
6. The novel tilt cylinder mechanism for the hydraulic motor as claimed in claim 1, wherein the wear-resistant floating ring is made of 42CrMo and is coated with a wear-resistant coating material on the surface.
7. The novel tilt cylinder mechanism for the hydraulic motor according to claim 1, wherein the floating seal assembly is a combination of a teflon seal ring and a fluororubber O-ring, the teflon seal ring is provided with an inner concave spherical surface, and the inner concave spherical surface is used for limiting the position of the fluororubber O-ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010511145.3A CN111520276A (en) | 2020-06-08 | 2020-06-08 | Novel tilt cylinder mechanism for hydraulic motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010511145.3A CN111520276A (en) | 2020-06-08 | 2020-06-08 | Novel tilt cylinder mechanism for hydraulic motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111520276A true CN111520276A (en) | 2020-08-11 |
Family
ID=71911469
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010511145.3A Pending CN111520276A (en) | 2020-06-08 | 2020-06-08 | Novel tilt cylinder mechanism for hydraulic motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111520276A (en) |
-
2020
- 2020-06-08 CN CN202010511145.3A patent/CN111520276A/en active Pending
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