CN113252335A - Detection device for detecting variable-pitch push rod device - Google Patents
Detection device for detecting variable-pitch push rod device Download PDFInfo
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- CN113252335A CN113252335A CN202110666931.5A CN202110666931A CN113252335A CN 113252335 A CN113252335 A CN 113252335A CN 202110666931 A CN202110666931 A CN 202110666931A CN 113252335 A CN113252335 A CN 113252335A
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- G01M13/00—Testing of machine parts
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Abstract
The invention discloses a detection device for detecting a variable-pitch push rod device, which comprises: the sealing end of the sealing shaft is inserted into the variable-pitch push rod; a rotation isolating bearing; the sealing shaft and the sliding rod are respectively arranged on an inner ring and an outer ring of the rotation isolating bearing; the sliding rod is arranged on the bracket in a sliding manner; the loading frame is connected with the sliding rod; a roller; the rope is wound on the roller, one part of the rope is horizontally arranged along the axial direction of the variable-pitch push rod, the end part of the horizontally arranged part is connected to one side, away from the variable-pitch push rod, of the loading frame, the other part of the rope is vertically arranged, and the end part of the vertically arranged part is used for being connected with the mass block. The detection device not only can provide axial force for the variable-pitch push rod when the variable-pitch push rod is in a rotating state, but also can keep the axial force constant when the variable-pitch push rod moves axially, so that the variable-pitch push rod device is in a variable-pitch operation environment, and the push rod device can be accurately detected.
Description
Technical Field
The invention relates to the field of detection of variable-pitch push rod devices, in particular to a detection device for detecting a variable-pitch push rod device.
Background
The variable pitch propeller device is used as a special propulsion device and is commonly used for engineering ships with variable working conditions, official law enforcement ships and double-locomotive parallel operation or multi-locomotive parallel operation ships. The variable pitch propeller device comprises a variable pitch push rod device. The variable-pitch push rod device comprises a speed reducer, a variable-pitch push rod and a variable-pitch executing mechanism.
In practical application, one end of the propeller pitch-variable rod is hermetically connected in the pitch-variable push rod and used for sealing high-pressure oil in the pitch-variable push rod, and meanwhile, the propeller pitch-variable rod forms axial force on the pitch-variable push rod to resist the pressure of the high-pressure oil. The variable-pitch push rod rotates under the driving of the speed reducer. The pitch-variable actuating mechanism is used for pushing the pitch-variable push rod to move axially, so that the pitch-variable function of the pitch-variable propeller device is realized.
In order to ensure the reliability of the pitch-controlled push rod device, the pitch-controlled push rod device needs to be detected before shipment. During detection, a sealing element needs to be provided for the variable-pitch push rod, and axial force needs to be provided for the sealing element. It is easier for a person skilled in the art to provide an axial force to the seal, but it is not easy to provide an axial force to the seal in the event of a rotational movement of the pitch horn and to ensure that the axial force remains constant during a pitch movement of the pitch horn. Therefore, the variable-pitch tappet device cannot be detected.
Disclosure of Invention
The invention aims to provide qualified axial force for a variable-pitch push rod, thereby facilitating the detection of a variable-pitch push rod device. In order to achieve the purpose, the invention provides the following technical scheme:
a detection device for detecting a pitch-variable push rod device, comprising:
the sealing end of the sealing shaft is inserted into the variable-pitch push rod;
a rotation isolating bearing;
the end, far away from the variable-pitch push rod, of the sealing shaft and the end, far away from the variable-pitch push rod, of the sliding rod are respectively installed on the inner ring and the outer ring of the rotation isolating bearing, and the sliding rod is far away from the variable-pitch push rod relative to the sealing shaft;
the sliding rod is slidably arranged on the bracket;
the loading frame is connected with the sliding rod;
the roller is arranged in the loading frame in a rotatable mode;
the rope is wound on the roller, one part of the rope is horizontally arranged along the axial direction of the variable-pitch push rod, the end part of the horizontally arranged part is connected to one side, away from the variable-pitch push rod, of the loading frame, the other part of the rope is vertically arranged, and the end part of the vertically arranged part is used for connecting the mass block.
Preferably, the slide bar comprises two parts, namely a first slide bar and a second slide bar, the load frame is located between the first slide bar and the second slide bar, two sides of the load frame are connected with the first slide bar and the second slide bar respectively, the bracket comprises a first bracket and a second bracket, the first slide bar is slidably disposed on the first bracket, and the second slide bar is slidably disposed on the second bracket.
Preferably, the loading frame comprises:
the first loading plate and the second loading plate are arranged along the axial direction of the variable-pitch push rod;
a connecting rod for connecting the first load plate and the second load plate, an end of the horizontally disposed portion of the rope being connected to the second load plate, the second load plate being remote from the pitch horn with respect to the first load plate.
Preferably, the connecting rod is plural, the plural connecting rods are arranged around an axis of the pitch changing push rod, and a vertical portion of the rope passes through a gap between the two connecting rods.
Preferably, a first threaded hole is formed in the first loading plate, the end of the first sliding rod is in threaded fit with the first threaded hole and penetrates out of the first threaded hole, and a first anti-drop ring is arranged at the end of the first sliding rod, which penetrates out of the first threaded hole;
and a second threaded hole is formed in the second loading plate, the end part of the second sliding rod is in threaded fit with the second threaded hole and penetrates out of the second threaded hole, and a second anti-falling ring is arranged at the end part of the second sliding rod, which penetrates out of the second threaded hole.
Preferably, the roller comprises a rolling bearing and a bearing sleeve, the bearing sleeve is sleeved outside the rolling bearing, and a guide groove for guiding the rope is formed in the bearing sleeve.
Preferably, a support rod penetrates through the rolling bearing, the support rod is arranged along the radial direction of the variable-pitch push rod, and two ends of the support rod are fastened on the support frame.
Preferably, the top of support has linked firmly the support, the inner wall of support inlays and is equipped with the steel ball, the steel ball is rotatable, the slide bar is worn to locate in the support, just be provided with the spout on the slide bar, a part of steel ball is located in the spout, the spout along the length direction of slide bar extends.
Preferably, a clamping groove is embedded in the inner wall of the support and arranged around the axis of the support, and a plurality of steel balls are arranged in the clamping groove.
Preferably, the support comprises an outer sleeve and an inner sleeve, the inner sleeve is provided with a clamping hole arranged around the axis of the inner sleeve, and the clamping hole and the inner wall of the outer sleeve form the clamping groove.
Preferably, a first sealing ring is arranged around the sealing end, a first sealing groove is arranged on the inner wall of the variable-pitch push rod, and the first sealing ring is arranged in the first sealing groove.
Preferably, a shaft shoulder is formed at the intersection of the sealing end head and the main body part of the sealing shaft, a second sealing groove is formed in the end face of the shaft shoulder, the second sealing groove is arranged around the joint of the variable-pitch push rod, and a second sealing ring is arranged in the second sealing groove.
According to the technical scheme, the sealing shaft is connected with the sliding rod through the rotation isolating bearing, and meanwhile, the rotation isolating bearing also isolates the rotation of the sealing shaft for the sliding rod, so that a condition is provided for providing constant axial force for the sealing shaft. In the detection process, the variable-pitch actuating mechanism is required to drive the variable-pitch push rod to axially move, and the variable-pitch push rod can sequentially drive the sealing shaft, the slide rod and the loading frame to axially move when axially moving. The loading frame can drive the rope to move horizontally when moving axially, the mass block can move up and down along with the movement of the rope, but the axial force loaded on the loading frame is constant because the mass of the mass block is constant.
Therefore, the detection device can provide axial force for the variable-pitch push rod when the variable-pitch push rod is in a rotating state, and the axial force is constant when the variable-pitch push rod moves axially, so that the variable-pitch push rod device is in a variable-pitch operation environment, and the push rod device can be accurately detected.
Drawings
In order to more clearly illustrate the solution of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the description below are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained based on these drawings without inventive efforts.
FIG. 1 is a cross-sectional view of a detection device for detecting a pitch change putter device in accordance with an embodiment of the present invention;
FIG. 2 is a top view of FIG. 1;
FIG. 3 is a cross-sectional view of a slide bar and a support provided in accordance with an embodiment of the present invention;
fig. 4 is a cross-sectional view of a seal shaft and a pitch change push rod according to an embodiment of the present invention.
Wherein, 1 is a variable-pitch push rod, 2 is a sealing shaft, 3 is a rotation isolating bearing, 4 is a first slide rod, 5 is a first support, 6 is a roller, 7 is a support frame, 8 is a connecting rod, 9 is a mass block, 10 is a second slide rod, 11 is a second support, 13 is a first support, 14 is a support rod, 15 is an inner bushing, 16 is a first sealing ring, 17 is a second sealing ring, and 18 is a second support.
Detailed Description
The invention discloses a detection device for detecting a variable-pitch push rod device, which can enable the variable-pitch push rod device to be in a variable-pitch working environment, so that the accurate detection of the variable-pitch push rod device is realized.
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 of the present invention without making any creative effort, shall fall within the protection scope of the present invention.
The invention discloses a detection device for detecting a variable-pitch push rod device, which comprises: sealing shaft 2, isolating bearing 3, slide bar, support, loading frame, gyro wheel 6 and rope.
Wherein, the sealing end of the sealing shaft 2 is inserted into the variable-pitch push rod 1 and is used for plugging the interface of the variable-pitch push rod 1. One end of the sealing shaft 2, which is far away from the variable-pitch push rod 1, and one end of the sliding rod are respectively arranged on an inner ring and an outer ring of the rotation isolating bearing 3. The slide rod is further away from the distance-changing push rod 1 with respect to the seal shaft 2. During the pitch-changing operation, the pitch-changing push rod 1 is driven by the speed reducer to rotate, and then the sealing shaft 2 rotates along with the pitch-changing push rod 1. The rotation isolating bearing 3 realizes the connection of the sealing shaft 2 and the sliding rod, and the rotation isolating bearing 3 also isolates the rotation of the sealing shaft 2 for the sliding rod, namely the sliding rod is not influenced by the rotation of the sealing shaft 2, thereby providing a condition for providing constant axial force for the sealing shaft 2.
In practical applications, one end of the seal shaft 2, which is far away from the pitch varying push rod 1, may be installed in the inner ring of the rotation isolating bearing 3, and the end of the slide rod may be provided with a bearing housing, and the rotation isolating bearing 3 may be installed in the bearing housing. Of course, it is also possible to install the end of the slide rod in the inner ring of the anti-rotation bearing 3 and the anti-rotation bearing 3 in the end housing of the seal shaft 2.
Continuing with the detection apparatus, a support is provided for supporting the slide bar while the slide bar is also slidable relative to the support. The loading frame is connected with the sliding rod. The loading frame is provided with rollers 6, and the rollers 6 can automatically transmit around the axis. The rope is wound on the roller 6. A part of the rope is horizontally arranged along the axial direction of the pitch push rod 1, and the end of the horizontally arranged part is connected to the side of the loading frame far away from the pitch push rod 1. Another part of the rope is arranged vertically and the ends of the vertically arranged part are used for connecting the mass 9. The ropes arranged at right angles transform the weight force of the mass 9 into an axial force in the horizontal direction. Since the cable is connected to the side of the loading frame remote from the distance-changing tappet 1, an axial force is exerted on the loading frame in the direction of the distance-changing tappet 1, which is transmitted via the slide rod to the sealing shaft 2. High-pressure oil is arranged in the variable-pitch push rod 1, and the axial force applied to the sealing shaft 2 can resist the pressure of the high-pressure oil.
It should be particularly noted that, in the detection process, the variable pitch actuating mechanism is required to drive the variable pitch push rod 1 to axially move, and the variable pitch push rod 1, when axially moving, sequentially drives the seal shaft 2, the slide rod and the loading frame to axially move. The loading frame can drive the rope to move horizontally when moving axially, the mass block 9 can move up and down along with the movement of the rope, but the axial force loaded on the loading frame is constant because the mass of the mass block 9 is constant.
Therefore, the detection device not only can provide axial force for the variable-pitch push rod 1 when the variable-pitch push rod 1 is in a rotating state, but also can keep the axial force constant when the variable-pitch push rod 1 moves axially, so that the variable-pitch push rod device is in a variable-pitch working environment, and the push rod device can be accurately detected.
The detection of the variable-pitch push rod device is divided into two aspects, namely, on one hand, whether the variable-pitch push rod 1 rotates normally under the action of the axial force formed by the mass block 9 is observed. On the other hand, whether the pitch distance and the pitch speed of the pitch push rod 1 meet the requirements when the pitch actuator drives the pitch push rod 1 to pitch is detected.
The following description is directed to specific structures of the slide bar and the loading frame: the slide bar comprises two parts, a first slide bar 4 and a second slide bar 10, respectively. The loading frame is located between the first slide bar 4 and the second slide bar 10. The two sides of the loading frame are respectively connected with the first slide bar 4 and the second slide bar 10. The bracket includes a first bracket 13 and a second bracket 11. The first slide bar 4 is slidably arranged on the first bracket 13. The second slide bar 10 is slidably arranged on a second bracket 11. The arrangement mode of the sliding rod, the bracket and the loading frame ensures the stability of the structure.
The loading frame specifically comprises a first loading plate, a second loading plate and a connecting rod 8. The first and second load plates are arranged along the axial direction of the pitch drive rod 1. The connecting rod 8 is used for connecting the first loading plate and the second loading plate. The second load plate is remote from the pitch horn 1 relative to the first load plate. The ends of the horizontally disposed portion of the rope are attached to the center portion of the second load plate.
The connecting rod 8 is a plurality of connecting rods 8, and the connecting rods 8 are uniformly arranged around the axis of the pitch-variable push rod 1. The roller 6 is arranged in the area surrounded by the plurality of connecting rods 8, and the center of the roller 6 and the center of the second loading plate are positioned on the same horizontal plane, so that the acting force of the mass block 9 acts on the axis of the variable pitch push rod 1, and the accuracy of the axial force is improved. The vertical part of the rope passes through the gap between the two connecting rods 8.
It should be noted that the first loading plate and the second loading plate may be preferably provided as circular plates.
The first slide bar 4 is connected with the first loading plate in the following manner: a first threaded hole is formed in the first loading plate, and the end part of the first sliding rod 4 is in threaded fit with the first threaded hole and penetrates out of the first threaded hole. The end of the first slide bar 4 that penetrates the first threaded hole, or the part of the first slide bar 4 that is located between the first load plate and the second load plate, is provided with a first anti-slip ring. The outer diameter of the first anti-drop ring is larger than the inner diameter of the first threaded hole, and the first anti-drop ring is used for preventing the end part of the first slide bar 4 from dropping out of the first threaded hole.
The second slide bar 10 is connected to the second load plate in the following manner: a second threaded hole is formed in the second loading plate, and the end of the second slide bar 10 is in threaded fit with and protrudes out of the second threaded hole. The end of the second slide bar 10 that protrudes through the second threaded hole, or the portion of the second slide bar 10 between the first load plate and the second load plate, is provided with a second anti-slip ring. The outer diameter of the second anti-slip ring is larger than the inner diameter of the second threaded hole, and is used for preventing the end of the second slide bar 10 from slipping out of the second threaded hole.
In order to facilitate the fixation of the rope, a horizontally arranged locking ring may be provided on the second loading plate, and the end of the rope may be tied to the locking ring.
The roller 6 is described next: the roller 6 comprises a rolling bearing and a bearing sleeve, and the bearing sleeve is sleeved outside the rolling bearing. The bearing sleeve is provided with a guide groove which is arranged along the axial direction of the bearing sleeve. The rope is wound in the guide groove, and the guide groove has a limiting effect on the rope, so that the rope is ensured to stably move. A support rod 14 penetrates through the rolling bearing, and the arrangement direction of the support rod 14 is vertical to the variable-pitch push rod 1. The two ends of the support bar 14 are fastened on the support frame 7. The arrangement structure of the roller 6 in the embodiment is simple and easy to realize.
The sliding support of the sliding rod by the bracket is described as follows: the top of the support is fixedly connected with a support, and a steel ball is embedded in the inner wall of the support and can rotate. The slide bar is arranged in the support in a penetrating mode, a sliding groove is formed in the slide bar, the sliding groove extends along the length direction of the slide bar, and a part of the steel ball is located in the sliding groove. Specifically, a clamping groove is formed in the inner wall of the support and arranged around the axis of the support, and a plurality of steel balls are arranged in the clamping groove. The steel ball card is in the draw-in groove, and the steel ball can freely rotate in the draw-in groove simultaneously. And for each steel ball, a sliding groove corresponding to the sliding rod is arranged on the sliding rod. Therefore, when the sliding rod moves axially, the steel ball rotates to reduce the friction force between the sliding rod and the support.
The support of the present invention comprises an outer sleeve and an inner sleeve 15 in view of easy manufacturing. The inner liner 15 is provided with a snap hole, which is a through hole, arranged around the axis of the inner liner 15. After the inner bushing 15 is installed in the outer sleeve, a clamping groove is formed between the clamping hole and the inner wall of the outer sleeve.
It should be noted that, if the support includes a first support 13 and a second support 11, the support includes a first support 5 and a second support 18, the first support 5 is disposed on the first support 13, and the second support 18 is disposed on the second support 11. The first slide bar 4 is arranged in the first support 5 and the second slide bar 10 is arranged in the second support 18.
The sealing structure of the seal shaft 2 is described next: a first sealing ring 16 is arranged around the sealing end of the sealing shaft 2, a first sealing groove is arranged on the inner wall of the variable-pitch push rod 1, and the first sealing ring 16 is arranged in the first sealing groove. In this manner, a radial seal is formed.
The sealing end head is of a reducing structure, and the diameter of the sealing end head is smaller than that of the main body part of the sealing shaft 2. The intersection of the sealing tip and the main body portion of the seal shaft 2 is formed with a shoulder. The shaft shoulder is in contact with the end face of the interface of the pitch-variable push rod 1. The end face of the shaft shoulder is provided with a second sealing groove, the second sealing groove is arranged around the connector of the variable-pitch push rod 1, and a second sealing ring 17 is arranged in the second sealing groove. The second sealing ring 17 is pressed between the shaft shoulder end surface of the sealing shaft 2 and the interface end surface of the variable-pitch push rod 1 to form end surface sealing. The radial seal and the face seal form an effective seal against the high pressure oil in the pitch horn 1.
Next, a method for detecting a pitch distance and a pitch speed of the pitch-changing push rod 1 during the pitch-changing process will be described, referring to fig. 1:
a. and controlling the pitch-changing actuating mechanism to move to the maximum positive pitch position, so that the pitch-changing push rod 1 moves to the leftmost end, and recording the distance from the right end surface of the second slide rod 10 to the right end surface of the second support 18 at the moment, and recording the distance as a.
b. And controlling the variable pitch actuating mechanism to move to the position of the maximum negative pitch, so that the variable pitch push rod 1 moves to the rightmost end. The timing is started when the pitch starts to change (starts to change from the maximum positive pitch) and stopped when the pitch stops changing (ends to the maximum negative pitch). The total length of the timing is denoted as t.
c. The distance from the right end face of the second slide bar 10 to the right end face of the second abutment 18 at this time is recorded as b.
d. And obtaining a variable pitch distance s according to a formula of s-b-a, and obtaining a variable pitch speed according to a formula of v-b-a/t.
e. And judging whether the variable pitch distance s and the variable pitch speed v meet the requirements or not.
Finally, it should also be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (12)
1. A sensing device for sensing a pitch horn device, comprising:
the sealing end of the sealing shaft is inserted into the variable-pitch push rod;
a rotation isolating bearing;
the end, far away from the variable-pitch push rod, of the sealing shaft and the end, far away from the variable-pitch push rod, of the sliding rod are respectively installed on the inner ring and the outer ring of the rotation isolating bearing, and the sliding rod is far away from the variable-pitch push rod relative to the sealing shaft;
the sliding rod is slidably arranged on the bracket;
the loading frame is connected with the sliding rod;
the roller is arranged in the loading frame in a rotatable mode;
the rope is wound on the roller, one part of the rope is horizontally arranged along the axial direction of the variable-pitch push rod, the end part of the horizontally arranged part is connected to one side, away from the variable-pitch push rod, of the loading frame, the other part of the rope is vertically arranged, and the end part of the vertically arranged part is used for connecting the mass block.
2. The detecting device for detecting the distance-changing push rod device according to claim 1, wherein the slide rod comprises two parts, namely a first slide rod and a second slide rod, the loading frame is located between the first slide rod and the second slide rod, two sides of the loading frame are respectively connected with the first slide rod and the second slide rod, the bracket comprises a first bracket and a second bracket, the first slide rod is slidably disposed on the first bracket, and the second slide rod is slidably disposed on the second bracket.
3. The detecting device for detecting a pitch-variable push rod device according to claim 2, wherein the loading frame comprises:
the first loading plate and the second loading plate are arranged along the axial direction of the variable-pitch push rod;
a connecting rod for connecting the first load plate and the second load plate, an end of the horizontally disposed portion of the rope being connected to the second load plate, the second load plate being remote from the pitch horn with respect to the first load plate.
4. The detecting device for detecting a pitch-variable push rod device according to claim 3, wherein the connecting rod is plural, plural connecting rods are arranged around an axis of the pitch-variable push rod, and a vertical portion of the rope passes through a gap between the two connecting rods.
5. The detection device for detecting the variable-pitch push rod device according to claim 3, wherein a first threaded hole is formed in the first loading plate, the end of the first slide rod is in threaded fit with the first threaded hole and penetrates out of the first threaded hole, and a first anti-drop ring is arranged on the end of the first slide rod, which penetrates out of the first threaded hole;
and a second threaded hole is formed in the second loading plate, the end part of the second sliding rod is in threaded fit with the second threaded hole and penetrates out of the second threaded hole, and a second anti-falling ring is arranged at the end part of the second sliding rod, which penetrates out of the second threaded hole.
6. The detecting device for detecting the variable-pitch push rod device according to claim 1, wherein the roller comprises a rolling bearing and a bearing sleeve, the bearing sleeve is sleeved outside the rolling bearing, and a guide groove for guiding the rope is formed in the bearing sleeve.
7. The detecting device for detecting the variable-pitch push rod device according to claim 6, wherein a support rod penetrates through the rolling bearing, the support rod is arranged along the radial direction of the variable-pitch push rod, and two ends of the support rod are fastened on a support frame.
8. The detecting device for detecting the variable-pitch push rod device according to claim 1, wherein a support is fixedly connected to the top of the support, a steel ball is embedded in the inner wall of the support, the steel ball is rotatable, the slide rod is arranged in the support in a penetrating manner, a sliding groove is arranged on the slide rod, a part of the steel ball is located in the sliding groove, and the sliding groove extends along the length direction of the slide rod.
9. The detection device for detecting the variable-pitch push rod device according to claim 8, wherein a clamping groove is embedded in the inner wall of the support, the clamping groove is arranged around the axis of the support, and a plurality of steel balls are arranged in the clamping groove.
10. The detecting device for detecting the variable-pitch push rod device according to claim 9, wherein the support comprises an outer sleeve and an inner sleeve, the inner sleeve is provided with a clamping hole arranged around an axis of the inner sleeve, and the clamping hole and an inner wall of the outer sleeve form the clamping groove.
11. The detecting device for detecting the variable-pitch push rod device according to claim 1, wherein a first sealing ring is disposed around the sealing end, a first sealing groove is disposed on an inner wall of the variable-pitch push rod, and the first sealing ring is installed in the first sealing groove.
12. The detecting device for detecting the variable-pitch push rod device according to claim 11, wherein a shoulder is formed at the intersection of the sealing end head and the main body part of the sealing shaft, a second sealing groove is arranged on the end face of the shoulder, the second sealing groove is arranged around the interface of the variable-pitch push rod, and a second sealing ring is arranged in the second sealing groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110666931.5A CN113252335A (en) | 2021-06-16 | 2021-06-16 | Detection device for detecting variable-pitch push rod device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110666931.5A CN113252335A (en) | 2021-06-16 | 2021-06-16 | Detection device for detecting variable-pitch push rod device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113252335A true CN113252335A (en) | 2021-08-13 |
Family
ID=77188359
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110666931.5A Withdrawn CN113252335A (en) | 2021-06-16 | 2021-06-16 | Detection device for detecting variable-pitch push rod device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113252335A (en) |
-
2021
- 2021-06-16 CN CN202110666931.5A patent/CN113252335A/en not_active Withdrawn
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Application publication date: 20210813 |