CN218796580U - Piston centrifuge does not have transmission sealing, hides oil circuit formula structure - Google Patents

Abstract

The utility model relates to a piston centrifuge field discloses a piston centrifuge does not have transmission and seals, hide oil circuit formula structure, the test platform comprises a support, be equipped with the main shaft in the frame, the main shaft end fixing has the hydro-cylinder, wear to be equipped with the push rod in the main shaft, the push rod stretches into in the hydro-cylinder and is connected with the piston and pushes away the material subassembly, the end fixing that the frame was kept away from to the hydro-cylinder has the end cover, be equipped with oil inlet and oil drain port on the frame, be equipped with the main shaft oil passageway with the oil inlet intercommunication on the main shaft, the hydro-cylinder lateral wall is equipped with the hydro-cylinder oil passageway with main shaft oil passageway intercommunication, the piston pushes away the material subassembly and is equipped with the piston oil passageway with hydro-cylinder oil passageway intercommunication, the inside push rod oil passageway that communicates with piston oil passageway that is equipped with of push rod oil passageway, still be equipped with the oil drain hole of intercommunication push rod oil passageway and oil drain port on the main shaft. The utility model discloses can solve and adopt among the prior art to stride across the external oil pipe that hydro-cylinder and seal extended to the seal afterbody, have the belt to change the operation and need dismantle external oil pipe earlier, work load is big and there is the problem of hydraulic oil leakage risk.

Description

Piston centrifuge does not have transmission sealing, hides oil circuit formula structure

Technical Field

The utility model relates to a piston centrifuge field, concretely relates to piston centrifuge does not have transmission and seals, hides oil circuit formula structure.

Background

An oil circuit system of an existing large-specification piston centrifuge is generally of an external oil pipe + transmission sealing structure, as shown in fig. 1, after a bearing in a machine base 1 is lubricated by an external oil pipe 3, the external oil pipe crosses an oil cylinder 2 and a sealing body 5 from the outer side of the machine base 1 and extends to an oil inlet pipe seat 4 at the tail part of the sealing body 5, high-pressure oil enters the oil cylinder 2 communicated with the sealing body 5 through a transmission sealing 6 installed in the sealing body 5, the oil cylinder 2 provides a reversing place of a piston pushing device and is connected with a main motor by serving as a belt pulley at the same time, and the oil circuit structure has the following problems in use:

1. the equipment is inconvenient to maintain, when only the belt needs to be replaced in the use process, the external oil pipe 3 must be firstly disassembled, so that the belt can be taken down or installed on the oil cylinder 2, the redundant workload is increased, and the cleanness of a use site is easily influenced due to the leakage of hydraulic oil;

2. the external oil pipe 3 has a long cantilever, and under the vibration working condition of equipment operation, the reliability is insufficient, so that a certain oil leakage risk exists;

3. the transmission seal 6 has a complex and fine structure, has extremely high requirements on processing precision, is usually a complete set of foreign devices purchased integrally, and has extremely high cost; meanwhile, difficulty is brought to inspection and maintenance;

4. the number of parts is large, so that the overall size of the equipment is increased, and the attractiveness of the whole machine is influenced.

SUMMERY OF THE UTILITY MODEL

The utility model discloses it is sealed, hide oil circuit formula structure to anticipate to provide a piston centrifuge does not have transmission to adopt to stride across the external oil pipe that hydro-cylinder and seal extended to the seal afterbody among the solution prior art, there is the belt to change the operation and need dismantle external oil pipe earlier, and work load is big and there is the problem of hydraulic oil leakage risk.

In order to achieve the above purpose, the utility model adopts the following technical scheme: the utility model provides a piston centrifuge does not have transmission seal, hide oil circuit formula structure, which comprises a base, be equipped with the main shaft in the frame, main shaft tip fixedly connected with hydro-cylinder, wear to be equipped with the push rod in the main shaft, the push rod stretches into in the hydro-cylinder and is connected with the piston and pushes away the material subassembly, the processing of hydro-cylinder outer wall has the belt groove, the end fixing that the frame was kept away from to the hydro-cylinder has the end cover, be equipped with oil inlet and oil drain port on the frame, be equipped with the main shaft oil passageway with the oil inlet intercommunication on the main shaft, the hydro-cylinder lateral wall is equipped with the hydro-cylinder oil passageway with main shaft oil passageway intercommunication, the piston pushes away the material subassembly and is equipped with the piston oil passageway with hydro-cylinder oil passageway intercommunication, the inside push rod oil passageway that communicates with piston oil passageway that is equipped with the oil drain hole of intercommunication on the main shaft.

The principle and the advantages of the scheme are as follows: in practical application, hydraulic oil enters from an oil inlet on the base, enters the oil cylinder oil channel through the main shaft oil channel and further enters the oil cylinder. The piston pushing assembly in the oil cylinder completes pushing action through hydraulic oil, the hydraulic oil is sent into the push rod oil channel through the piston oil channel, and then enters the oil discharge port from the push rod oil channel and the oil discharge hole to be discharged. Adopt hollow main shaft and push rod structure like this, set up hidden oil circuit in inside, cancel prior art's external oil pipe, hydro-cylinder, frame outside do not have and stride and cover the structure, as the hydro-cylinder of band pulley simultaneously, the belt on it can directly dismouting change, and convenient operation is laborsaving, does not have the risk that hydraulic oil leaked. And the oil cylinder is directly sealed by the sealing end cover, the dynamic and static motion during working is not required to be converted by transmission sealing, the number of parts is reduced, and the manufacturing cost of the product is reduced. The overall dimension of the piston centrifuge can be further reduced, and the occupied area during installation of user equipment can be saved.

Preferably, as an improvement, a bearing seat sleeved outside the main shaft is arranged in the machine seat, the bearing seat is fixed in the machine seat, an annular oil inlet groove communicated with the main shaft oil channel is formed in the inner wall of the bearing seat, the annular oil inlet groove is communicated with the oil inlet, an annular oil discharge groove communicated with the oil discharge hole is formed in the inner wall of the bearing seat, and the annular oil discharge groove is communicated with the oil discharge port. The bearing seat is used as transition connection between the main shaft and the machine base, the circular groove structure is used for ensuring that the main shaft can continuously keep smooth of an oil way in the operation process, and the oil inlet and the oil discharge can be effectively separated.

Preferably, as an improvement, a front bearing and a rear bearing are arranged between the front end and the rear end of the main shaft and the base, a front bearing oil duct is arranged between the annular oil inlet groove and the front bearing, and a rear bearing oil duct is arranged between the annular oil discharge groove and the rear bearing. The lubricating oil pipe arranged outside the base in the prior art is omitted, the bearing is lubricated by the internal oil way, the overall appearance of the piston centrifuge is simpler, and the risk of oil leakage of the external lubricating oil pipe is avoided.

Preferably, as an improvement, a labyrinth seal is arranged between the bearing seat and the main shaft, and parts of the labyrinth seal are used as parts of the front bearing oil passage and the rear bearing oil passage. Because the bearing block is fixed, the main shaft rotates, the labyrinth seal can be adopted to effectively seal the contact area of the bearing block and the main shaft, a small amount of hydraulic oil leaked by the labyrinth seal is used for lubricating a front bearing and a rear bearing, a bearing lubricating oil channel is not required to be separately processed in the bearing block or the main shaft, and an external lubricating oil pipe is not required to be connected outside the engine base.

Preferably, as an improvement, two concentric O-shaped sealing rings are arranged between the end part of the main shaft and the oil cylinder, the oil cylinder and the main shaft are connected by a bolt between the two O-shaped sealing rings, and the main shaft oil channel is positioned between the two O-shaped sealing rings. Preferably, the seal between the main shaft and the oil cylinder is stable and reliable.

Drawings

Fig. 1 is a schematic structural diagram of an oil circuit system in the prior art.

Fig. 2 is a partial cross-sectional view of an embodiment of the present invention.

Fig. 3 is a partial enlarged cross-sectional view of the connection portion between the oil cylinder and the main shaft in the embodiment of the present invention.

Detailed Description

The following is further detailed by way of specific embodiments:

reference numerals in the drawings of the specification include: the oil cylinder comprises a machine base 1, an oil inlet 101, an oil outlet 102, an oil cylinder 2, an oil cylinder oil channel 201, a piston oil channel 202, an external oil pipe 3, an oil inlet pipe seat 4, a sealing body 5, a transmission seal 6, a main shaft 7, a main shaft oil channel 701, an oil discharge hole 702, a bearing seat 8, an annular oil inlet groove 801, an annular oil discharge groove 802, a push rod 9, a push rod oil channel 901, a front bearing 10, a sealing end cover 11, a front bearing oil duct 12, a labyrinth seal 13, a piston 14, a slide valve 15, a reversing rod 16 and an O-shaped sealing ring 17.

The embodiment is basically as shown in the attached figures 2 and 3: the utility model provides a piston centrifuge does not have transmission sealing, hides oil circuit formula structure, includes frame 1, is equipped with main shaft 7 in the frame 1, is equipped with front bearing 10 and rear bearing between the preceding, the back both ends of main shaft 7 and the frame 1, and main shaft 7 front end bolted connection has hydro-cylinder 2, is equipped with two concentric O type sealing washers 17 between the front end of main shaft 7 and hydro-cylinder 2, and the bolt is located between two O type sealing washers 17. The spindle 7 is hollow and is coaxially provided with a push rod 9 in the interior, the push rod 9 extends into the oil cylinder 2 and is connected with a piston 14 pushing assembly, the piston 14 pushing assembly is a prior art assembly comprising a reversing rod 16, a slide valve 15, a piston 14 and a piston oil channel 202, and the specific structure is not described herein.

The outer wall of the oil cylinder 2 is provided with a belt groove, and the end part of the oil cylinder 2 far away from the machine base 1 is fixed with a sealing end cover 11 through a bolt. An oil inlet 101 and an oil outlet 102 are arranged on the machine base 1, a bearing seat 8 sleeved on the outer side of the main shaft 7 is arranged in the machine base 1, the bearing seat 8 is fixed in the machine base 1 through a pin, a main shaft oil channel 701 is arranged on the main shaft 7, an oil cylinder oil channel 201 communicated with the main shaft oil channel 701 is arranged on the side wall of the oil cylinder 2, and the connecting end of the main shaft oil channel 701 and the oil cylinder oil channel 201 is located between the two O-shaped sealing rings 17.

The cylinder oil channel 201 is communicated with the piston oil channel 202, a push rod oil channel 901 communicated with the piston oil channel 202 is arranged in the push rod 9, and an oil discharge hole 702 communicated with the push rod oil channel 901 is further arranged on the main shaft 7. An annular oil inlet groove 801 communicated with the main shaft oil channel 701 is formed in the inner wall of the bearing seat 8, the annular oil inlet groove 801 is communicated with the oil inlet 101, an annular oil drain groove 802 communicated with the oil drain hole 702 is formed in the inner wall of the bearing seat 8, and the annular oil drain groove 802 is communicated with the oil drain port 102. A front bearing oil duct 12 is arranged between the annular oil inlet groove 801 and the front bearing 10, and a rear bearing oil duct is arranged between the annular oil discharge groove 802 and the rear bearing. A labyrinth seal 13 is arranged between the bearing seat 8 and the main shaft 7, the labyrinth seal 13 between the annular oil inlet groove 801 and the front bearing 10 is used as a part of a front bearing oil passage 12, and the labyrinth seal 13 between the annular oil outlet groove 802 and the rear bearing is used as a part of a rear bearing oil passage.

The specific implementation process is as follows: in the operation process of the piston 14 centrifuge, hydraulic oil sucked out by a hydraulic pump enters the machine base 1 from the oil inlet 101 through a pipeline, then enters the main shaft oil channel 701 on the main shaft 7 through the annular oil inlet groove 801 on the bearing seat 8, and then enters the oil cylinder oil channel 201 from the main shaft oil channel 701, and the hydraulic oil in the oil cylinder 2 drives the piston 14 pushing assembly to complete pushing action. After the hydraulic oil in the oil cylinder 2 is pushed, the hydraulic oil enters the push rod oil passage 901 from the piston oil passage 202, then enters the annular oil drainage groove 802 from the push rod oil passage 901 through the oil drainage hole 702, and is drained from the oil drainage port 102 communicated with the annular oil drainage groove 802. Thus, an internal hidden oil way structure is formed, an external oil pipe 3 outside the engine base 1 is omitted, and the whole engine is simpler and more beneficial to overhaul. A clearance of 0.2-0.5mm is reserved between the labyrinth seals 13 in the front bearing oil duct 12 and the rear bearing oil duct, so that a small amount of hydraulic oil in the annular oil inlet groove 801 and the annular oil outlet groove 802 can leak through the front bearing oil duct 12 and the rear bearing oil duct to lubricate the front bearing 10 and the rear bearing, and in this way, a special oil pipe for lubricating the outer side of the engine base 1 can be removed, and the appearance of the whole machine is further simplified.

The above description is only an example of the present invention, and the detailed technical solutions and/or characteristics known in the solutions are not described too much here. It should be noted that, for those skilled in the art, without departing from the technical solution of the present invention, several modifications and improvements can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicability of the patent. The scope of the claims of the present application shall be determined by the contents of the claims, and the description of the embodiments and the like in the specification shall be used to explain the contents of the claims.

Claims (5)

1. The utility model provides a piston centrifuge does not have transmission and seals, hides oil circuit formula structure, includes the frame, is equipped with the main shaft in the frame, and main shaft tip fixedly connected with hydro-cylinder wears to be equipped with the push rod in the main shaft, and the push rod stretches into in the hydro-cylinder and is connected with the piston and pushes away the material subassembly, and the processing of hydro-cylinder outer wall has belt groove, its characterized in that: the end portion, far away from the frame, of the oil cylinder is fixed with a sealing end cover, the frame is provided with an oil inlet and an oil discharge port, a main shaft oil channel communicated with the oil inlet is arranged on the main shaft, an oil cylinder oil channel communicated with the main shaft oil channel is arranged on the side wall of the oil cylinder, a piston pushing assembly is provided with a piston oil channel communicated with the oil cylinder oil channel, a push rod oil channel communicated with the piston oil channel is arranged inside the push rod, and the main shaft is further provided with an oil discharge hole communicated with the push rod oil channel and the oil discharge port.

2. The piston centrifuge non-transmission sealing and oil circuit hiding structure as claimed in claim 1, wherein: the oil inlet of the main shaft is communicated with the oil inlet, the oil outlet of the main shaft is communicated with the oil outlet of the main shaft, and the oil outlet of the main shaft is communicated with the oil outlet of the main shaft.

3. The piston centrifuge non-transmission sealing and oil path hiding structure as claimed in claim 2, wherein: the oil-saving oil-discharging device is characterized in that a front bearing and a rear bearing are arranged between the front end and the rear end of the main shaft and the base, a front bearing oil duct is arranged between the annular oil inlet groove and the front bearing, and a rear bearing oil duct is arranged between the annular oil discharging groove and the rear bearing.

4. The piston centrifuge non-transmission sealing and oil path hiding structure as claimed in claim 3, wherein: and a labyrinth seal is arranged between the bearing seat and the main shaft, and the part of the labyrinth seal is used as a part of the front bearing oil duct and the rear bearing oil duct.

5. The piston centrifuge non-transmission sealing and oil path hiding structure as claimed in claim 4, wherein: two concentric O-shaped sealing rings are arranged between the end part of the main shaft and the oil cylinder, the oil cylinder and the main shaft are connected through a bolt between the two O-shaped sealing rings, and the main shaft oil channel is located between the two O-shaped sealing rings.

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