CN109556854B - Auxiliary valve core detection structure of rotary direct drive servo valve - Google Patents
Auxiliary valve core detection structure of rotary direct drive servo valve Download PDFInfo
- Publication number
- CN109556854B CN109556854B CN201811441081.3A CN201811441081A CN109556854B CN 109556854 B CN109556854 B CN 109556854B CN 201811441081 A CN201811441081 A CN 201811441081A CN 109556854 B CN109556854 B CN 109556854B
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- China
- Prior art keywords
- detection
- valve core
- auxiliary valve
- direct drive
- rod
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- 238000001514 detection method Methods 0.000 title claims abstract description 86
- 210000004907 Glands Anatomy 0.000 claims abstract description 10
- 238000007789 sealing Methods 0.000 claims abstract description 4
- 239000000463 material Substances 0.000 claims description 3
- 230000002452 interceptive Effects 0.000 claims description 2
- 229910001220 stainless steel Inorganic materials 0.000 claims description 2
- 239000010935 stainless steel Substances 0.000 claims description 2
- 230000002265 prevention Effects 0.000 claims 2
- 229910052782 aluminium Inorganic materials 0.000 claims 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminum Chemical compound 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[Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims 1
- 238000005299 abrasion Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002035 prolonged Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
Abstract
The invention belongs to the technical field of hydraulic mechanical structures, and relates to an auxiliary valve core detection structure of a rotary direct drive servo valve, which consists of a detection rocker arm (1), a detection pressure rod (2), a detection gland (3), a detection pressure plate (4) and a safety pin (5), wherein the detection rocker arm (1) is sleeved on the auxiliary valve core; the detection pressing cover (3) is sleeved on the detection pressing rod (2), and the tail end of the detection pressing rod (2) is fixedly connected with the detection pressing plate (4); a sealing groove (2a) and a safety hole are formed in the detection pressure rod (2), and a safety pin (5) penetrates through the safety hole; the valve body is provided with a unthreaded hole matched with the detection pressure rod (2) and a threaded hole matched with the detection gland (3) at the position to be detected. The structure provided by the invention can regularly detect the states of the auxiliary valve core and the clutch, is simple and convenient, is easy to operate in an external field, improves the maintainability of a product, and ensures the mechanical redundancy of the main valve core and the auxiliary valve core to be normal.
Description
Technical Field
The invention belongs to the technology of hydraulic mechanical structures, and relates to a secondary valve core detection structure for a rotary direct drive servo valve.
Background
In the existing hydraulic mechanical rotary direct drive servo valve structure, a main valve core and auxiliary valve core plus clutch structure is adopted, an electric channel is used for monitoring the state of the main valve core in real time, the auxiliary valve core and the clutch are not monitored by the electric channel, and the valve core is blocked but cannot be detected, so that redundancy failure is caused.
Disclosure of Invention
The purpose of the invention is: the auxiliary valve core detection design structure is provided, whether the auxiliary valve core is blocked or not can be detected regularly, and the maintainability and the reliability of the rotary direct drive servo valve are improved.
The technical scheme of the invention is as follows: rotating an auxiliary valve core detection structure which directly drives the servo valve; the safety valve is characterized by comprising a detection rocker arm (1), a detection pressure rod (2), a detection gland (3), a detection pressure plate (4) and a safety pin (5), wherein the detection rocker arm (1) is sleeved on an auxiliary valve core; the detection pressing cover (3) is sleeved on the detection pressing rod (2), and the tail end of the detection pressing rod (2) is fixedly connected with the detection pressing plate (4); a sealing groove (2a) and a safety hole are formed in the detection pressure rod (2), and a safety pin (5) penetrates through the safety hole; the valve body is provided with a unthreaded hole matched with the detection pressure rod (2) and a threaded hole matched with the detection gland (3) at the position to be detected.
The invention has the advantages that: the state of the auxiliary valve core and the state of the clutch can be regularly detected, the external field operation is simple and convenient, the maintainability of the product is improved, and the mechanical redundancy of the main valve core and the auxiliary valve core is ensured to be normal.
Drawings
FIG. 1 is a schematic diagram of a secondary spool detection configuration and primary and secondary spools,
figure 2 is a cross-sectional view of a rotary direct drive servo valve employing a secondary spool sensing arrangement,
description of numbering: 1-detection rocker arm, 2-detection pressure rod, 3-detection gland, 4-detection pressure plate, 5-safety pin, 6-main valve core and 7-auxiliary valve core.
Detailed Description
The present invention is described in further detail below. Referring to fig. 1 and 2, the secondary valve core detection structure for directly driving the servo valve in a rotating mode comprises a secondary valve core detection structure for directly driving the servo valve in a rotating mode. The safety valve consists of a detection rocker arm (1), a detection pressure rod (2), a detection gland (3), a detection pressure plate (4) and a safety pin (5), wherein the detection rocker arm (1) is sleeved on an auxiliary valve core; the detection pressing cover (3) is sleeved on the detection pressing rod (2), and the tail end of the detection pressing rod (2) is fixedly connected with the detection pressing plate (4); a sealing groove (2a) and a safety hole are formed in the detection pressure rod (2), and a safety pin (5) penetrates through the safety hole; the valve body is provided with a unthreaded hole matched with the detection pressure rod (2) and a threaded hole matched with the detection gland (3) at the position to be detected.
On the basis of the structure, in order to prevent the detection pressing plate (4) and the detection pressing cover (3) from loosening, fuse holes are further formed in the detection pressing plate (4), the detection pressing cover (3) and the detection pressing rod (2), and the looseness of the fuses is prevented.
On the basis of the structure, the detection pressure lever (2) is made of stainless steel materials with good wear resistance, so that the service life of the structure can be prolonged, and oil leakage caused by abrasion can be prevented.
The working principle of the invention is as follows: during detection, the safety pin is taken down, the detection pressure plate and the detection pressure rod are pressed down, the detection rocker arm is pushed to rotate, and the auxiliary valve core is driven to rotate. The pressing to the bottom indicates that the auxiliary valve core rotates normally; after the hand is loosened, the detection of the rebound of the pressure lever indicates that the auxiliary valve core clutch device is normal. And after the detection is finished, a safety pin is installed, so that the detection assembly is prevented from interfering the normal work of the main valve core and the auxiliary valve core.
Claims (5)
1. Rotatory direct drive servovalve's vice case detects structure, its characterized in that: the device consists of a detection rocker arm (1), a detection pressure rod (2), a detection gland (3), a detection pressure plate (4) and a safety pin (5); the detection rocker arm (1) is sleeved on the auxiliary valve core; the detection pressing cover (3) is sleeved on the detection pressing rod (2), and the tail end of the detection pressing rod (2) is fixedly connected with the detection pressing plate (4); a sealing groove (2a) and a safety hole are formed in the detection pressure rod (2), and a safety pin (5) penetrates through the safety hole; a to-be-detected position of the valve body is provided with a unthreaded hole matched with the detection pressure rod (2) and a threaded hole matched with the detection gland (3);
during detection, the safety pin (5) is taken down, the detection pressure plate (4) is pressed, then the detection pressure rod (2) is pressed, the detection rocker arm (1) is pushed to rotate, and the auxiliary valve core is driven to rotate; the pressing to the bottom indicates that the auxiliary valve core rotates normally; after the hand is released, the detection pressure rod (2) rebounds to indicate that the auxiliary valve core clutch device is normal; and after the detection is finished, a safety pin (5) is installed to prevent the detection assembly from interfering the normal work of the main valve core and the auxiliary valve core.
2. The sub spool sensing structure of a rotary direct drive servo valve according to claim 1, wherein: fuse holes are further formed in the detection pressing plate (4) and the detection pressing rod (2), and looseness prevention is achieved through fuses.
3. The sub spool sensing structure of a rotary direct drive servo valve according to claim 1, wherein: the contact part of the detection gland (3) and the valve body is provided with a fuse hole, and the looseness prevention is realized through the fuse.
4. The sub spool sensing structure of a rotary direct drive servo valve according to claim 1, wherein: the detection pressure lever (2) is made of stainless steel material with good wear resistance.
5. The sub spool sensing structure of a rotary direct drive servo valve according to claim 1 or 2, wherein: the detection pressing plate (4) is made of aluminum product materials.
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